10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)
☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended June 18, 2022
	OR
☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from _________________to _________________

Commission File Number 001-33987

HERITAGE-CRYSTAL CLEAN, INC.

(Exact name of registrant as specified in its charter)

Delaware	26-0351454
State or other jurisdiction of	(I.R.S. Employer
Incorporation	Identification No.)

2175 Point Boulevard

Suite 375

Elgin, IL 60123

(Address of principal executive offices and zip code)  

Registrant’s telephone number, including area code: (847) 836-5670

Securities registered pursuant to Section 12(b) of the Act:
Title of each Class	Trading Symbol	Name of Exchange on which registered
Common Stock, par value $0.01 per share	HCCI	NASDAQ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes x No o

Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).   Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See definitions of “large accelerated filer,” “accelerated filer,” "smaller

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reporting company," and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer o		Accelerated filer x
Non-accelerated filer o	(Do not check if a smaller reporting company)	Smaller reporting company   ☐
		Emerging growth company   ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ☐ No x

On July 26, 2022, there were outstanding 24,170,679 shares of Common Stock, $0.01 par value, of Heritage-Crystal Clean, Inc.

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Table of Contents

PART I
ITEM 1.   FINANCIAL STATEMENTS	4
ITEM 2.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	29
ITEM 3.   QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	37
ITEM 4.   CONTROLS AND PROCEDURES	37
PART II
ITEM 1.   LEGAL PROCEEDINGS	38
ITEM 1A.  RISK FACTORS	38
ITEM 6.   EXHIBITS	39
SIGNATURES	41

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PART I

    ITEM 1. FINANCIAL STATEMENTS

Heritage-Crystal Clean, Inc.

Condensed Consolidated Balance Sheets

(In Thousands, Except Share and Par Value Amounts)

	June 18, 2022		January 1, 2022
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	73,760	$	56,269
Accounts receivable - net	80,266		62,513
Inventory - net	36,221		29,536
Assets held for sale	1,125		1,125
Other current assets	4,427		6,773
Total current assets	195,799		156,216
Property, plant and equipment - net	171,169		166,301
Right of use assets	89,541		83,865
Equipment at customers - net	25,107		24,146
Software and intangible assets - net	44,610		45,949
Goodwill	49,695		49,695
Investments at fair value	3,000		—
Other assets	616		692
Total assets	$	579,537	$	526,864
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable	$	45,043	$	36,179
Current portion of lease liabilities	22,576		20,146
Contract liabilities - net	2,646		2,094
Accrued salaries, wages, and benefits	7,669		8,980
Taxes payable	8,503		8,474
Other current liabilities	11,177		9,476
Total current liabilities	97,614		85,349
Lease liabilities, net of current portion	70,391		65,041
Other long term liabilities	710		473
Contingent consideration	1,410		2,819
Deferred income taxes	32,070		31,126
Total liabilities	$	202,195	$	184,808
STOCKHOLDERS' EQUITY:
Common stock - 26,000,000 shares authorized at $0.01 par value, 23,494,045 and 23,473,931 shares issued and outstanding at June 18, 2022 and January 1, 2022, respectively	$	235	$	235
Additional paid-in capital	206,296		204,920
Retained earnings	171,052		137,067
Accumulated other comprehensive loss	(241)		(166)
Total stockholders' equity	377,342		342,056
Total liabilities and stockholders' equity	$	579,537	$	526,864

See accompanying notes to financial statements.

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Heritage-Crystal Clean, Inc.

Condensed Consolidated Statements of Income

(In Thousands, Except per Share Amounts)

(Unaudited)

		Second Quarter Ended,				First Half Ended,
		June 18, 2022		June 19, 2021		June 18, 2022		June 19, 2021
Revenues
	Service revenues	$	75,583	$	60,033	$	144,490	$	117,732
	Product revenues	74,790		51,551		139,272		93,817
	Rental income	6,274		5,695		12,251		11,111
Total revenues		$	156,647	$	117,279	$	296,013	$	222,660
Operating expenses
	Operating costs	$	104,755	$	78,329	$	206,538	$	155,099
	Selling, general, and administrative expenses	15,024		13,039		28,759		25,228
	Depreciation and amortization	6,777		5,619		13,285		9,401
	Other expense (income) - net	1,001		(330)		791		(439)
Operating income		29,090		20,622		46,640		33,371
Interest expense – net		250		177		473		501
Income before income taxes		28,840		20,445		46,167		32,870
Provision for income taxes		7,733		5,334		12,182		8,553
Net income		$	21,107	$	15,111	$	33,985	$	24,317
Net income per share: basic		$	0.90	$	0.65	$	1.45	$	1.04
Net income per share: diluted		$	0.89	$	0.64	$	1.44	$	1.03
Number of weighted average shares outstanding: basic		23,489		23,404		23,482		23,389
Number of weighted average shares outstanding: diluted		23,644		23,565		23,640		23,537

See accompanying notes to financial statements.

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Heritage-Crystal Clean, Inc.

Condensed Consolidated Statements of Comprehensive Income

(In Thousands)

(Unaudited)

		Second Quarter Ended,				First Half Ended,
		June 18, 2022		June 19, 2021		June 18, 2022		June 19, 2021
Net income		$	21,107	$	15,111	$	33,985	$	24,317
	Other comprehensive loss:
	Currency translation adjustments	(121)		—		(75)		—
	Total other comprehensive loss:	$	(121)	$	—	$	(75)	$	—
Comprehensive income		$	20,986	$	15,111	$	33,910	$	24,317

See accompanying notes to financial statements.

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Heritage-Crystal Clean, Inc.

Condensed Consolidated Statement of Stockholders’ Equity

(In Thousands, Except Share Amounts)

For the Second Quarter Ended June 18, 2022 and June 19, 2021

(Unaudited)

Second Quarter Ended,
June 18, 2022
	Shares	Par Value Common		Additional Paid–in Capital		Retained Earnings		Accumulated Other Comprehensive Loss		Total Equity
Balance, March 26, 2022	23,477,764	$	235	$	206,390	$	149,945	$	(120)	$	356,450
Net income	—	—		—		21,107		—		21,107
Currency translation adjustment	—	—		—		—		(121)		(121)
Issuance of common stock – ESPP	4,794	—		134		—		—		134
Share-based compensation	11,487	—		1,174		—		—		1,174
Share repurchases to satisfy tax withholding obligations	—	—		(1,402)		—		—		(1,402)
Balance at June 18, 2022	23,494,045	$	235	$	206,296	$	171,052	$	(241)	$	377,342
Second Quarter Ended,
June 19, 2021
	Shares	Par Value Common		Additional Paid–in Capital		Retained Earnings		Accumulated Other Comprehensive Loss		Total Equity
Balance at March 27, 2021	23,390,434	$	234	$	201,758	$	85,325	$	—	$	287,317
Net income	—	—		—		15,111		—		15,111
Issuance of common stock – ESPP	4,750	—		126		—		—		126
Share-based compensation	15,422	—		1,472		—		—		1,472
Balance at June 19, 2021	23,410,606	$	234	$	203,356	$	100,436	$	—	$	304,026

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First Half Ended,
June 18, 2022
	Shares	Par Value Common		Additional Paid–in Capital		Retained Earnings		Accumulated Other Comprehensive Loss		Total Equity
Balance, January 1, 2022	23,473,931	$	235	$	204,920	$	137,067	$	(166)	$	342,056
Net income	—	—		—		33,985		—		33,985
Currency translation adjustment	—	—		—		—		(75)		(75)
Issuance of common stock – ESPP	8,627	—		251		—		—		251
Share-based compensation	11,487	—		2,527		—		—		2,527
Share repurchases to satisfy tax withholding obligations	—	—		(1,402)		—		—		(1,402)
Balance at June 18, 2022	23,494,045	$	235	$	206,296	$	171,052	$	(241)	$	377,342
First Half Ended,
June 19, 2021
	Shares	Par Value Common		Additional Paid–in Capital		Retained Earnings		Accumulated Other Comprehensive Income		Total Equity
Balance, January 2, 2021	23,340,700	$	233	$	201,148	$	76,119	$	—	$	277,500
Net income	—	—		—		24,317		—		24,317
Issuance of common stock – ESPP	10,822	—		247		—		—		247
Share-based compensation	59,084	1		2,690		—		—		2,691
Share repurchases to satisfy tax withholding obligations	—	—		(729)		—		—		(729)
Balance at June 19, 2021	23,410,606	$	234	$	203,356	$	100,436	$	—	$	304,026

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Heritage-Crystal Clean, Inc.

Condensed Consolidated Statements of Cash Flows

(In Thousands)

(Unaudited)

	First Half Ended,
	June 18, 2022		June 19, 2021
Cash flows from Operating Activities:
Net income	$	33,985	$	24,317
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,285		9,401
Provision for civil action settlement	750		—
Uncollectible provision	453		567
Share-based compensation	2,785		2,886
Deferred taxes	944		8,612
Other, net	1,099		(30)
Changes in operating assets and liabilities:
(Increase) in accounts receivable	(18,207)		(11,481)
(Increase) in inventory	(6,685)		(978)
Decrease in other current assets	2,345		2,948
Increase in accounts payable	8,091		2,149
Increase in accrued liabilities	323		2,952
Cash provided by operating activities	$	39,168	$	41,343
Cash flows from Investing Activities:
Capital expenditures	$	(15,936)	$	(10,926)
Proceeds from sale of assets	96		1,533
Investment in Retriev	(3,000)		—
Cash used in investing activities	$	(18,840)	$	(9,393)
Cash flows from Financing Activities:
Payment of Term Loan	—		(30,000)
Debt Issuance Costs	—		(822)
Repayment of principal on finance leases	(1,686)		(949)
Share repurchases to satisfy tax withholding obligations	(1,402)		(729)
Proceeds from the issuance of common stock	251		247
Cash used in financing activities	$	(2,837)	$	(32,253)
Net increase (decrease) in cash and cash equivalents	17,491		(303)
Cash and cash equivalents, beginning of period	56,269		67,575
Cash and cash equivalents, end of period	$	73,760	$	67,272
Supplemental disclosure of cash flow information:
Income taxes paid	$	11,796	$	637
Cash paid for interest	140		108
Supplemental disclosure of non-cash information:
Payables for construction in progress	874		375

See accompanying notes to financial statements.

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HERITAGE-CRYSTAL CLEAN, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

June 18, 2022

(1)    ORGANIZATION AND NATURE OF OPERATIONS

Heritage-Crystal Clean, Inc., a Delaware corporation and its subsidiaries (collectively the “Company”), provide parts cleaning, hazardous and non-hazardous containerized waste, used oil collection, wastewater vacuum, antifreeze recycling and field services primarily to small and mid-sized industrial and vehicle maintenance customers. The Company owns and operates a used oil re-refinery where it re-refines used oils and sells high quality base oil for use in the manufacture of finished lubricants as well as other re-refinery products. The Company also has multiple locations where it dehydrates used oil. The oil processed at these locations is primarily sold as recycled fuel oil. The Company also operates multiple non-hazardous waste processing facilities as well as antifreeze recycling facilities at which it produces virgin-quality antifreeze. The Company's locations are in the United States and Ontario, Canada. The Company conducts its primary business operations through Heritage-Crystal Clean, LLC, its wholly owned subsidiary, and all intercompany balances have been eliminated in consolidation.

The Company has two reportable segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists of the Company's parts cleaning, containerized waste management, wastewater vacuum, antifreeze recycling activities, and field services. The Oil Business segment consists of the Company's used oil collection, recycled fuel oil sales, used oil re-refining activities, and used oil filter removal and disposal services. No customer represented greater than 10% of consolidated revenues for any of the periods presented. There were no intersegment revenues. Both segments operate in the United States and, to an immaterial degree, in Ontario, Canada. As such, the Company is not disclosing operating results by geographic segment.

The Company’s fiscal year ends on the Saturday closest to December 31. The most recent fiscal year ended on January 1, 2022. Each of the Company's first three fiscal quarters consists of twelve weeks while the last fiscal quarter consists of sixteen or seventeen weeks.  

In the Company's Environmental Services segment, product revenues include sales of solvent, machines, absorbent, accessories, and antifreeze; service revenues include servicing of parts cleaning machines, containerized waste removal services, wastewater vacuum services, field services, and other services; rental income includes embedded lease income from certain of our parts cleaning contracts. In the Company's Oil Business segment, product revenues primarily consist of sales of re-refined base oil, re-refinery co-products and recycled fuel oil; service revenues include revenues from used oil collection activities, collecting and disposing of wastewater and removal and disposal of used oil filters. Due to the Company's integrated business model, it is impracticable to separately present costs of tangible products and costs of services.

COVID-19 Pandemic

We are closely monitoring the spread and impact of the COVID-19 pandemic and are continually assessing its potential effects on our business and our financial performance as well as the businesses of our customers and vendors. The Company cannot predict the duration or severity of the COVID-19 pandemic, and we cannot reasonably estimate the financial impact the COVID-19 outbreak will have on our results and significant estimates going forward.

The ultimate impact of the COVID-19 pandemic on our business, results of operations, financial condition and cash flows is highly uncertain and cannot be accurately predicted and is dependent on future developments, including the duration of the pandemic and the related length of its impact on the global economy, and any new information that may emerge concerning the COVID-19 outbreak and the actions to contain it or treat its impact. In fiscal 2021, the continued impact on our business as a result of COVID-19 pandemic resulted in additional lost work hours which negatively impacted our ability to service our customers on a timely basis, the effect of which is included in the fiscal 2021 financial operations in this filing. Although no material impact on our business occurred during the second quarter of 2022, the continued impact on our business as a result of the COVID-19 pandemic could result in a material adverse effect on our business, results of operations, financial condition, prospects and the trading prices of our securities in the near-term and throughout 2022.

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(2)    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    The Company's significant accounting policies are described in Note 2, "Summary of Significant Accounting Policies," in the Company's Annual Report on Form 10-K for the fiscal year ended January 1, 2022. There have been no material changes in these policies or their application during the second quarter of fiscal 2022.

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(3)    BUSINESS COMBINATIONS

On September 27, 2021, the Company completed the acquisition of Source Environmental, Inc., ("Source Environmental"), which increased the Company's penetration in the hazardous and non-hazardous waste business in several markets in the western U.S. This transaction also provided us the opportunity to internalize the performance of certain field service activities in the western U.S. Total consideration for the acquisition was approximately $20.4 million. To date, there have been no adjustments to the purchase price. Factors leading to goodwill being recognized are the Company’s expectation of synergies from combining operations of Source Environmental, and the Company as well as the value of intangible assets that are not separately recognized, such as the assembled workforce. Transaction costs incurred in conjunction with the acquisition of Source Environmental were immaterial. The results of Source Environmental are consolidated into the Company’s Environmental Services segment.

On September 13, 2021, the Company completed the acquisition of Raider Environmental Services of Florida, Inc., ("Raider Environmental"), which expanded our network of wastewater processing, oil collection and non-hazardous waste consolidation and solidification to better serve our customers in Florida and throughout the Southern United States. Total consideration for the acquisition was approximately $13.7 million. To date, there have been no adjustments to the purchase price. This acquisition provided the Company with another wastewater treatment facility as well as assets to help further our initiative to increase our non-hazardous containerized waste processing capabilities. This also provided us exposure to industry verticals in which we didn't previously participate. Factors leading to goodwill being recognized are the Company’s expectation of synergies from combining operations of Raider Environmental, and the Company as well as the value of intangible assets that are not separately recognized, such as the assembled workforce. Transaction costs incurred in conjunction with the acquisition of Raider Environmental were immaterial. The results of Raider Environmental are consolidated primarily into the Company’s Environmental Services segment and an immaterial amount in the Oil Business segment from the date of acquisition.

On August 24, 2021, Heritage-Crystal Clean completed the acquisition of certain assets of Bakersfield Transfer, Inc., and Cole’s Services, Inc., together known as ("Cole's Environmental"), which processed, stored, and disposed of hazardous waste within the state of California. The purchase price was $17.3 million subject to certain adjustments, including a contingent consideration provision. Goodwill recognized from the acquisition of Cole's Environmental, represents the excess of the estimated purchase consideration transferred over the estimated fair value of the assets acquired and liabilities assumed. To date, there have been no adjustments to the purchase price. Factors leading to goodwill being recognized are the Company’s expectation of synergies from combining operations of Cole's Environmental, and the Company as well as the value of intangible assets that are not separately recognized, such as the assembled workforce. The results of Cole's Environmental are consolidated primarily into the Company’s Environmental Services segment and an immaterial amount in the Oil Business segment from the date of acquisition.

The following table summarizes the estimated fair values of the assets acquired, net of cash acquired, related to each acquisition as of June 18, 2022:

	As of June 18, 2022
(thousands)	Source Environmental, Inc.		Raider Environmental Services of Florida, Inc.		Cole's Environmental
Accounts receivable	$	1,064	$	488	$	—
Inventory	—		—		73
Other current assets	6		162		—
Property, plant, & equipment	174		4,404		2,455
Intangible assets	13,692		6,056		9,620
Goodwill	6,174		2,835		5,144
Accounts payable and accruals	(677)		(218)		—
Total purchase price, net of cash acquired	$	20,433	$	13,727	$	17,292
Less: contingent consideration	—		—		5,819
Less: to be placed in escrow	—		—		100
Net cash paid	$	20,433	$	13,727	$	11,373

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(4) REVENUE

We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when our performance obligations under the terms of a contract with our customers are satisfied. Recognition occurs when the Company transfers control by completing the specified services at the point in time the customer benefits from the services performed or once our products are delivered. The majority of revenue is recognized at a point in time, except for rental income which is recognized on an over time basis. The Company measures progress toward complete satisfaction of a performance obligation satisfied over time using a cost-based input method. This method of measuring progress provides a faithful depiction of the transfer of goods or services because the costs incurred are expected to be substantially proportionate to the Company’s satisfaction of the performance obligation. Revenue is measured as the amount of consideration we expect to receive in exchange for completing our performance obligations. Sales tax and other taxes we collect with revenue-producing activities are excluded from revenue. In the case of contracts with multiple performance obligations, the Company allocates the transaction price to each performance obligation based on the relative stand-alone selling prices of the various goods and/or services encompassed by the contract. We do not have any material significant payment terms as payment is generally due within 30 days after the performance obligation has been satisfactorily completed. The Company has elected the practical expedient to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less. In applying the guidance in Topic 606, there were no judgments or estimates made that the Company deems significant.

Contract Balances — Contract assets primarily relate to the Company’s rights to consideration for work completed in relation to its services performed but not billed at the reporting date. Contract liabilities primarily consist of advance payments of performance obligations yet to be fully satisfied in the period reported. Our contract liabilities and contract assets are reported in a net position at the end of each reporting period.

We disaggregate our revenue from contracts with customers by major lines of business for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors.

The following table disaggregates our revenue by major lines:

	Second Quarter Ended,
	June 18, 2022						June 19, 2021
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning, Containerized Waste, & related products/services	$	50,320	$	—	$	50,320	$	40,741	$	—	$	40,741
Wastewater Vacuum Services	21,150		—		21,150		14,848		—		14,848
Field Services	6,539		—		6,539		4,749		—		4,749
Antifreeze Business	7,118		—		7,118		6,285		—		6,285
Environmental Services - Other	486		—		486		407		—		407
Re-Refinery Product Sales	—		54,198		54,198		—		38,830		38,830
Oil Collection Services & RFO	—		9,253		9,253		—		4,552		4,552
Oil Filter Business	—		1,309		1,309		—		1,172		1,172
Revenues from Contracts with Customers	85,613		64,760		150,373		67,030		44,554		111,584
Rental income	6,265		9		6,274		5,686		9		5,695
Total Revenues	$	91,878	$	64,769	$	156,647	$	72,716	$	44,563	$	117,279

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	First Half Ended,
	June 18, 2022						June 19, 2021
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts cleaning, containerized waste, & related products/services	$	97,176	$	—	$	97,176	$	79,574	$	—	$	79,574
Wastewater Vacuum Services	38,541		—		38,541		28,541		—		28,541
Field Services	12,829		—		12,829		8,845		—		8,845
Antifreeze Business	14,774		—		14,774		13,273		—		13,273
Environmental Services - Other	981		—		981		847		—		847
Re-refinery Product Sales	—		103,337		103,337		—		68,883		68,883
Oil Collection Services & RFO	—		13,566		13,566		—		9,169		9,169
Oil Filter Business	—		2,558		2,558		—		2,417		2,417
Revenues from Contracts with Customers	164,301		119,461		283,762		131,080		80,469		211,549
Rental income	12,228		23		12,251		11,093		18		11,111
Total Revenues	$	176,529	$	119,484	$	296,013	$	142,173	$	80,487	$	222,660

The following table provides information about contract assets and contract liabilities from contracts with customers:

(thousands)	June 18, 2022		January 1, 2022
Contract assets	$	73	$	268
Contract liabilities	2,719		2,362
Contract liabilities - net	$	2,646	$	2,094

During the fiscal quarter ended June 18, 2022, the Company recognized no revenue that was included in the contract liabilities balance as of January 1, 2022. During the first half ended June 18, 2022, the Company recognized $2.4 million of revenue that was included in the contract liabilities balance as of January 1, 2022. The Company has no assets recognized from costs to obtain or fulfill a contract with a customer. We do not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less.

(5)    ACCOUNTS RECEIVABLE

Accounts Receivable — Net, includes amounts billed to and currently due from customers. The amounts due are stated at their net estimated realizable value. The allowance for uncollectible accounts is our best estimate of the amount of probable lifetime-expected credit losses in existing accounts receivable and is determined based on our historical collections experience, age of the receivable, knowledge of the customer and the condition of the general economy and industry as a whole. The Company does not have any off-balance-sheet credit exposure related to its customers.

Accounts receivable for the second quarter ended June 18, 2022, and the fiscal year ended January 1, 2022 consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Trade	$	73,487	$	59,132
Less: allowance for uncollectible accounts	3,011		2,928
Trade - net	70,476		56,204
Related parties	9,354		5,410
Other	436		899
Total accounts receivable - net	$	80,266	$	62,513

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The following table provides the changes in the Company’s allowance for uncollectible accounts for the first half ended June 18, 2022, and the fiscal year ended January 1, 2022:

(thousands)	June 18, 2022		January 1, 2022
Balance at beginning of period	$	2,928	$	2,502
Provision for uncollectible accounts	453		1,930
Accounts written off, net of recoveries	(370)		(1,504)
Balance at end of period	$	3,011	$	2,928

(6)    INVENTORY

The carrying value of inventory consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Solvents and solutions	$	10,429	$	7,704
Used oil and processed oil	12,734		9,361
Machines	5,175		4,995
Drums and supplies	6,028		5,731
Other	2,297		2,246
Total inventory	36,663		30,037
Less: machine refurbishing reserve	442		501
Total inventory - net	$	36,221	$	29,536

Inventory consists primarily of used oil, processed oil, solvents and solutions, new and refurbished parts cleaning machines, drums and supplies, and other items. Inventories are valued at the lower of first-in, first-out (FIFO) cost or net realizable value, net of any reserves for excess, obsolete, or unsalable inventory. The Company monitors its inventory levels at each of its locations and evaluates inventories for excess or slow-moving items. If circumstances indicate the cost of inventories exceed their recoverable value, inventories are reduced to net realizable value. The Company had no inventory write downs during the second quarter of fiscal 2022 compared to $0.2 million of inventory write downs during the second quarter of fiscal 2021.

(7) GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill is measured as a residual amount as of the acquisition date, which in most cases results in measuring goodwill as an excess of the purchase consideration transferred plus the fair value of any noncontrolling interest in the acquiree over the fair value of the net assets acquired, including any contingent consideration. The Company tests goodwill for impairment annually in the fourth quarter and in interim periods if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Company's determination of fair value requires certain assumptions and estimates, such as margin expectations, market conditions, growth expectations, expected changes in working capital, etc., regarding expected future profitability and expected future cash flows. The Company reports and tests goodwill for impairment only in its Environmental Services reporting unit.

15

The following table shows changes to our goodwill balances by segment from January 1, 2022 to June 18, 2022:

(thousands)	Environmental Services		Total
Goodwill at January 1, 2022
Gross carrying amount	$	49,695	$	49,695
Accumulated impairment loss	—		—
Net book value at January 1, 2022	$	49,695	$	49,695
Goodwill at June 18, 2022
Gross carrying amount	49,695		$	49,695
Accumulated impairment loss	—		—
Net book value at June 18, 2022	$	49,695	$	49,695

The following is a summary of software and other intangible assets:

	June 18, 2022						January 1, 2022
(thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer & supplier relationships	$	47,167	$	22,918	$	24,249	$	47,167	$	20,725	$	26,442
Permits	13,590		1,249		12,341		13,590		879		12,711
Software	13,202		6,820		6,382		11,721		6,399		5,322
Non-compete agreements	4,427		3,511		916		4,048		3,340		708
Patents, formulae, and licenses	1,769		936		833		1,769		906		863
Other*	606		717		(111)		996		1,093		(97)
Total software and intangible assets	$	80,761	$	36,151	$	44,610	$	79,291	$	33,342	$	45,949

*Other intangibles include an above market lease acquired in September 2021 that had a fair value of ($0.7) million upon acquisition and is being accreted over the remaining useful life of the lease.

Amortization expense was $1.4 million for the second quarter ended June 18, 2022, and $1.0 million for the second quarter ended June 19, 2021. Amortization expense was $2.8 million for the first half ended June 18, 2022, and $2.3 million for the first half ended June 19, 2021.

The weighted average useful lives of software and other intangibles are as follows:

	Weighted Average Useful Life (years)
Permits	16
Patents, formulae, & licenses	15
Customer and supplier relationships	12
Software	9
Non-compete agreements	5
Other	7

16

    The estimated amortization expense for the remainder of fiscal 2022 and each of the five succeeding fiscal years is as follows:

(millions)
Fiscal Year	Amortization Expense
2022	$3.4
2023	5.7
2024	4.1
2025	3.1
2026	2.5
2027	2.5

The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, the finalization of the fair value of intangible assets that have been acquired from business combinations, disposal of intangible assets, accelerated amortization of intangible assets, and other events.

17

(8)    ACCOUNTS PAYABLE

Accounts payable consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Accounts payable	$	44,105	$	35,613
Accounts payable - related parties	938		566
Total accounts payable	$	45,043	$	36,179

(9)    DEBT AND FINANCING ARRANGEMENTS

Bank Credit Facility

On March 18, 2021, Heritage-Crystal Clean, LLC, (the “Company”), entered into an Amended and Restated Credit Agreement (the "Agreement"), by and among the Company, its parent, Heritage-Crystal Clean, Inc., and the Company’s subsidiaries identified therein and Bank of America, N.A., as administrative agent, JPMorgan Chase Bank, N.A., and Wells Fargo Bank, National Association. The Agreement replaces the Company's previous Credit Agreement dated as of February 21, 2017. During the first quarter of 2021 the Company paid down its previous term loan, in full, of $30.0 million. The new Agreement provides for borrowings of up to $100.0 million, in the form of a revolving facility, of which $15 million can be used in the form of a Swing Line loan. The Agreement also provides for up to an additional $50.0 million of borrowings using an accordion feature upon approval of the lenders.

Loans made under the Agreement, as amended, may be Base Rate Loans or LIBOR Rate Loans, at the election of the Borrower subject to certain exceptions. Base Rate Loans have an interest rate equal to (i) the higher of (a) the federal funds rate plus 0.5%, (b) the London Interbank Offering Rate (“LIBOR”) plus 1%, or (c) Bank of America's prime rate, plus (ii) a variable margin of between 0.50% and 1.25% depending on the Company's total leverage ratio, calculated on a consolidated basis. LIBOR rate loans have an interest rate equal to (i) the LIBOR rate plus (ii) a variable margin of between 1.50% and 2.25% depending on the Company's total leverage ratio. Amounts borrowed under the Agreement are secured by a security interest in substantially all of the Company's tangible and intangible assets. The Company incurred $0.8 million of debt issuance costs related to the amended credit agreement.

The Credit Agreement contains customary terms and provisions (including representations, covenants, and conditions) for transactions of this type. Certain covenants, among other things, restrict the Company's and its subsidiaries' ability to incur indebtedness, grant liens, make investments and sell assets. The Credit Agreement also contains customary events of default, covenants and representations and warranties. Financial covenants include:

•An interest coverage ratio (based on interest expense and EBITDA) of at least 3.5 to 1.0;

•A total leverage ratio no greater than 3.0 to 1.0, provided that in the event of a permitted acquisition having an aggregate consideration equal to $10.0 million or more, at the Borrower’s election, the foregoing 3.00 to 1.00 shall be deemed to be 3.50 to 1.00 for the fiscal quarter in which such permitted acquisition occurs and the three immediately following fiscal quarters and will thereafter revert to 3.00 to 1.00.

The Credit Agreement places certain limitations on acquisitions and the payment of dividends.

On July 27, 2017, the Financial Conduct Authority, which regulates LIBOR, announced that it intended to phase out the London Interbank Offered Rate by the end of 2021. Subsequently the phase out deadline was extended to June 30, 2023. We expect that widespread use of LIBOR will transition to alternative interest rates in the near future. Since loans made under our Credit Agreement may be LIBOR based loans, the phasing out of LIBOR may adversely affect interest rates that could result in higher borrowing costs and higher interest expense. As the Company does not have any outstanding borrowings under the financial instruments impacted by LIBOR, the effect on the financial statements is not material.

The Company had no outstanding borrowings as of June 18, 2022 and January 1, 2022.

18

For the second quarter ended June 18, 2022, the Company recorded interest expense of $0.3 million with respect to our credit line and related amortization of debt issuance costs. For the second quarter ended June 19, 2021, the Company recorded interest expense of $0.3 million with respect to our term loan and credit line, and related amortization of debt issuance costs.

As of June 18, 2022 and January 1, 2022, the Company was in compliance with all covenants under its Credit Agreement. As of June 18, 2022 and January 1, 2022, the Company, had $6.7 million and $5.6 million, of standby letters of credit issued, respectively, and $93.3 million and $94.4 million was available for borrowing under the bank credit facility, respectively.

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(10)    SEGMENT INFORMATION

The Company has two reportable segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists primarily of the Company's parts cleaning, containerized waste management, wastewater vacuum services, antifreeze recycling activities, and field services. The Oil Business segment consists primarily of the Company's used oil collection, used oil re-refining activities, and the dehydration of used oil to be sold as recycled fuel oil.

No single customer in either segment accounted for more than 10.0% of consolidated revenues in any of the periods presented. There were no intersegment revenues. Both the Environmental Services and Oil Business segments operate in the United States and, to an immaterial degree, in Ontario, Canada. As such, the Company is not disclosing operating results by geographic segment.

Segment results for the second quarter ended June 18, 2022 and June 19, 2021 were as follows:

Second Quarter Ended,
June 18, 2022
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	72,979	$	2,604	$	—	$	75,583
	Product revenues	12,634		62,156		—		74,790
	Rental income	6,265		9		—		6,274
Total revenues		$	91,878	$	64,769	$	—	$	156,647
Operating expenses
	Operating costs	68,914		35,841		—		104,755
	Operating depreciation and amortization	3,192		2,125		—		5,317
Profit before corporate selling, general, and administrative expenses		$	19,772	$	26,803	$	—	$	46,575
Selling, general, and administrative expenses						15,024		15,024
Depreciation and amortization from SG&A						1,460		1,460
Total selling, general, and administrative expenses						$	16,484	$	16,484
Other expense (income) - net						1,001		1,001
Operating income								29,090
Interest expense – net						250		250
Income before income taxes								$	28,840

20

Second Quarter Ended,
June 19, 2021
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	56,403	$	3,630	$	—	$	60,033
	Product revenues	10,627		40,924		—		51,551
	Rental income	5,686		9		—		5,695
Total revenues		$	72,716	$	44,563	$	—	$	117,279
Operating expenses
	Operating costs	51,119		27,210		—		78,329
	Operating depreciation and amortization	2,430		2,109		—		4,539
Profit before corporate selling, general, and administrative expenses		$	19,167	$	15,244	$	—	$	34,411
Selling, general, and administrative expenses						13,039		13,039
Depreciation and amortization from SG&A						1,080		1,080
Total selling, general, and administrative expenses						$	14,119	$	14,119
Other (income) - net						(330)		(330)
Operating income								20,622
Interest expense – net						177		177
Income before income taxes								$	20,445

Segment results for the first half ended June 18, 2022, and June 19, 2021 were as follows:

First Half Ended,
June 18, 2022
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	139,278	$	5,212	$	—	$	144,490
	Product revenues	25,023		114,249		—		139,272
	Rental income	12,228		23		—		12,251
Total revenues		$	176,529	$	119,484	$	—	$	296,013
Operating expenses
	Operating costs	136,532		70,006		—		206,538
	Operating depreciation and amortization	6,081		4,209		—		10,290
Profit before corporate selling, general, and administrative expenses		$	33,916	$	45,269	$	—	$	79,185
Selling, general, and administrative expenses						28,759		28,759
Depreciation and amortization from SG&A						2,995		2,995
Total selling, general, and administrative expenses						$	31,754	$	31,754
Other expense (income) - net						791		791
Operating income								46,640
Interest expense – net						473		473
Income before income taxes								$	46,167

21

First Half Ended,
June 19, 2021
(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
Service revenues	$	109,706	$	8,026			$	117,732
Product revenues	21,374		72,443		—		93,817
Rental income	11,093		18				11,111
Total revenues	$	142,173	$	80,487	$	—	$	222,660
Operating expenses
Operating costs	102,999		52,100		—		155,099
Operating depreciation and amortization	4,008		3,058				7,066
Profit (loss) before corporate selling, general, and administrative expenses	$	35,166	$	25,329	$	—	$	60,495
Selling, general, and administrative expenses					25,228		25,228
Depreciation and amortization from SG&A					2,335		2,335
Total selling, general, and administrative expenses					$	27,563	$	27,563
Other (income) - net					(439)		(439)
Operating income							33,371
Interest expense – net					501		501
Income before income taxes							$	32,870

Total assets by segment as of June 18, 2022 and January 1, 2022 were as follows:

(thousands)		June 18, 2022		January 1, 2022
Total Assets:
	Environmental Services	$	294,619	$	281,333
	Oil Business	187,999		171,188
	Unallocated Corporate Assets	96,919		74,343
Total		$	579,537	$	526,864

Segment assets for the Environmental Services and Oil Business segments consist of property, plant, and equipment, right-of-use assets, intangible assets, accounts receivable, goodwill, and inventories. Assets for the corporate unallocated amounts consist of property, plant, and equipment used at the corporate headquarters as well as cash and net deferred tax assets.

22

(11)    COMMITMENTS AND CONTINGENCIES

LEASES

Lessee

The Company leases buildings and property, railcars, machinery and equipment, and various types of vehicles and trailers for use in our operations. Each arrangement is evaluated individually to determine if the arrangement is or contains a lease at inception. The Company has lease agreements with lease and non-lease components and we have elected to not separate lease and non-lease components for all classes of underlying assets. In addition, our lease agreements do not contain any material residual guarantees or restrictive covenants.

Leases may include variable lease payments for common area maintenance, real estate taxes, and truck lease mileage. Variable lease payments are not included in the initial measurement of the right-of-use assets or lease liabilities, and are recorded as lease expense in the period incurred. Options to extend or terminate a lease are included in the lease term when it is reasonably certain that we will exercise that option. We have elected not to record leases with an initial term of 12 months or less on the balance sheet and instead recognize those lease payments on a straight-line basis over the lease term. Leases with initial terms in excess of 12 months are recorded as either operating or financing leases in our Consolidated Balance Sheet.

Right-of-use assets represent the Company's right to use an underlying asset during the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Our leased right-of-use assets are measured at the initial measurement of the lease liability, adjusted for any lease payments made prior to the lease commencement date, less any lease incentives received and other initial direct costs incurred. Our lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use an incremental borrowing rate based on the information available at commencement date, including lease term, in determining the present value of future payments.

Our leases have remaining terms ranging from less than one month to approximately 12 years and may include options to extend or terminate the lease when it is reasonably certain that the option will be exercised. Lease expense is recognized on a straight-line basis over the lease term. Our finance leases include a fleet of mobile equipment.

Lessor

The Company is a lessor of portions of buildings and property, railcars, and equipment such as embedded leases of parts cleaning machines. Each of the Company’s leases is classified as an operating lease, and the vast majority are short-term leases. Variable lease payments include real and personal property taxes, which are based on the lessee’s pro rata portion of such amounts, and excess mileage charges which are computed as the actual miles traveled in a calendar year minus the maximum average mileage allowance as specified per the contract. Options to extend the lease beyond the original terms range from day-to-day renewals to increments of five-year extensions. Options to terminate the lease range from immediate termination upon return of the asset to various written notification periods following a minimum lease term. Options for a lessee to purchase the underlying asset are not contractually specified but may be negotiated on a case-by-case basis. Significant judgments made in determining whether a contract contains a lease include assessments as to whether or not the contract conveys the right to direct the use of an identified asset. Significant judgments made in allocating consideration between lease and non-lease components include techniques applied in estimating the relative stand-alone selling prices of the lease and non-lease components of the contract in cases where a stand-alone selling price is not directly observable. No leased assets are covered by residual value guarantees. The Company manages the risk associated with the residual value of leased assets through such means as performing periodic maintenance and upkeep activities and the inclusion of contractual terms that hold the lessee responsible for damage incurred to leased assets. The Company has made an accounting policy election to exclude from the consideration in the contract, and from variable payments not included in the consideration in the contract, all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific lease revenue-producing transaction and collected by the lessor from a lessee.

The Company recognizes rental income on a straight-line basis for that portion of the consideration allocated to the embedded lease component of certain of our parts cleaning contracts. We also recognize rental income on certain subleases of railcars and portions of buildings and property.

Rental income was as follows:

23

	Second Quarter Ended,
	June 18, 2022						June 19, 2021
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	6,233	$	—	$	6,233	$	5,636	$	—	$	5,636
Property	32		9		41		50		9		59
Total rental income	$	6,265	$	9	$	6,274	$	5,686	$	9	$	5,695

	First Half Ended,
	June 18, 2022						June 19, 2021
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	12,172	$	—	$	12,172	$	11,043	$	—	$	11,043
Property	56		23		79		50		18		68
Total rental income	$	12,228	$	23	$	12,251	$	11,093	$	18	$	11,111

Purchase Obligations

The Company may enter into purchase obligations with certain vendors. They represent expected payments to third party service providers and other commitments entered into during the normal course of our business. These purchase obligations are generally cancellable with or without notice, without penalty, although certain vendor agreements provide for cancellation fees or penalties depending on the terms of the contract.

The Company has purchase obligations in the form of open purchase orders of $16.8 million as of June 18, 2022, and $16.5 million as of January 1, 2022, primarily for used oil, solvent, machine purchases, disposal and transportation expenses, and capital expenditures.

Litigation and Claims

The Company may be subject to investigations, claims or lawsuits as a result of operating its business, including matters governed by environmental laws and regulations. The Company may also be subject to tax audits in a variety of jurisdictions. When claims are asserted, the Company evaluates the likelihood that a loss will occur and records a liability for those instances when the likelihood is deemed probable and the exposure is reasonably estimable. The Company carries insurance at levels it believes are adequate to cover loss contingencies based on historical claims activity. When the potential loss exposure is limited to the insurance deductible and the likelihood of loss is determined to be probable, the Company accrues for the amount of the required deductible, unless a lower amount of exposure is estimated. As of June 18, 2022 and January 1, 2022, the Company had accrued $3.9 million and $3.2 million related to loss contingencies and other contingent liabilities, respectively.

(12)    INCOME TAXES

Tax expense for the second fiscal quarter of 2022 was $7.7 million. The Company's effective tax rate for the second quarter of fiscal 2022 was 27.0% compared to 26.1% in the second quarter of fiscal 2021. Tax expense for the first fiscal half of 2022 was $12.2 million. The Company’s effective tax rate for the first half of fiscal 2022 was 26.4% compared to 26.0% in the first half of 2021. The rate increases are principally attributable to the increased impact of certain adjustments to federal taxable income as compared to the first half of fiscal 2021.

The Company establishes reserves when it is more likely than not that the Company will not realize the full tax benefit of a position. The Company had a reserve of $2.2 million for uncertain tax positions as of June 18, 2022. The gross unrecognized tax benefits would, if recognized, decrease the Company's effective tax rate.

As of June 18, 2022, the Company believes it is more likely than not that a benefit from foreign net operating loss carryforwards will not be realized. The Company provided a valuation allowance against those foreign net operating loss carryforwards of $0.6 million.

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(13)    SHARE-BASED COMPENSATION

 Restricted Stock Compensation/Awards

Annually, the Company grants restricted shares to its Board of Directors. The shares become fully vested one year from their grant date. The fair value of each restricted stock grant is based on the closing price of the Company's common stock on the date of grant. The Company amortizes the expense over the service period, which is the fiscal year in which the award is granted. In addition, the Company may grant restricted shares to certain members of management based on their services and contingent upon continued service with the Company. The restricted shares vest over a period of approximately three years from the grant date. The fair value of each restricted stock grant is based on the closing price of the Company's common stock on the date of grant.

The following table shows a summary of restricted share grants and expense resulting from the awards:

    

			Compensation Expense
(thousands, except share amounts)			First Half Ended,		Unrecognized Expense as of,
Recipient of Grant	Grant Date	Restricted Shares	June 18, 2022	June 19, 2021	June 18, 2022	June 19, 2021
Special Incentive Grant	April, 2018	350,000	380	810	—	1,111
Members of Management	May, 2019	23,560	—	110	—	145
Members of Management	February, 2020	41,138	40	66	47	280
Chief Executive Officer	February, 2021	500,000	1,067	912	2,814	5,310
Members of Management	February, 2021	35,898	103	71	345	586
Board of Directors	April, 2021	11,487	—	150	—	182
Members of Management	February, 2022	75,355	245	—	1,303	—
Board of Directors	April, 2022	17,082	234	—	246	—

On January 8, 2021, the Company and Mr. Brian Recatto entered into an amended Executive Employment Agreement (the “Amended Agreement”) which was effective on February 1, 2021. Pursuant to the Amended Agreement, the Company replaced in its entirety section 4.3 of the First Amendment to the Executive Employment Agreement relating to equity compensation that was effective February 1, 2017. As of February 1, 2021, Mr. Recatto received a one-time award of 500,000 shares of restricted stock, subject to the achievement of performance criteria established by the Compensation Committee of the Board of Directors pursuant to the Company's 2019 Incentive Plan.

The award date for such Performance-Based Restricted Stock was on February 1, 2021. Such award was granted pursuant to and governed by the terms of the 2019 Incentive Plan and an award agreement in a form provided by the Company. The Performance-Based Restricted Stock one-time award of 500,000 shares received on February 1, 2021, shall vest on January 31, 2025 if Mr. Recatto is employed by the Company on that date, in an amount determined by applying the applicable percentages from the chart below, with the common stock price increases to be determined based on the increase in the price of the Company’s common stock (if any) from the closing price of the common stock as reported by Nasdaq on the amended agreement commencement date ($21.77) and the common stock price on the potential vesting date (determined by using the average closing price of a share of the Company's common stock for the 90-day period ending on the vesting date). If the stock price does not increase by $5.00, then no shares shall vest.

During the second quarter of fiscal 2022, the Company recorded approximately $1.1 million of compensation expense related to this award. In the future, the Company expects to recognize compensation expense of approximately $2.8 million over the remaining requisite service period, which ends January 31, 2025. The fair value of this restricted stock award as of the grant date was estimated using a Monte Carlo simulation model. Key assumptions used in the Monte Carlo simulation to estimate the grant date fair value of this award are a risk-free rate of 0.29%, expected dividend yield of zero, and an expected volatility assumption of 53.07%.

25

Vesting Table
Increase in Stock Price From the Amended Agreement Commencement Date to the Vesting Date	Total Percentage of Restricted Stock Shares to Be Vested
Less than $5 per share increase	—%
$5 per share increase	25% (vest in 125,000 shares)
$10 per share increase	50% (vest in 250,000 shares)
$15 per share increase	75% (vest in 375,000 shares)
$20 or more per share increase	100% (vest in 500,000 shares)

Provision for possible accelerated vesting of award

If the average closing price of the Company's common stock increases by the marginal levels set forth in the above vesting table for any consecutive 180 day period between February 1, 2021 and January 31, 2025, Mr. Recatto shall become vested in 50% of the corresponding total percentage of restricted shares earned on the last day of the 180 day period.

In addition, on each of December 31, 2021, December 31, 2022, and December 31, 2023, to the extent Mr. Recatto remains employed by the Company under the Amended Agreement on such date, Mr. Recatto shall receive a grant of restricted stock as of such date valued at Five Hundred Thousand Dollars ($500,000), with the number of shares of restricted stock constituting such grant determined by applying the average closing price for a share of the Company’s common stock for the 90-day period ending on such date. Such awards of Time-Based Restricted Stock shall be granted pursuant to and governed by the terms of the 2019 Incentive Plan and an award agreement in a form provided by the Company. The Time-Based Restricted Stock shall vest only if Mr. Recatto remains employed by the Company under the Amended Agreement through December 31, 2023; provided, that, upon a Change of Control of the Company (as such term is defined in the Amended Agreement), all shares of the Time-Based Restricted Stock awarded up through the date of closing of the Change in Control shall become vested, and no further award of Time-Based Restricted Stock shall be awarded. During the second quarter of fiscal 2022, the Company recorded approximately $0.3 million of compensation expense related to this award.

The following table summarizes the restricted stock activity for the second quarter ended June 18, 2022:

Restricted Stock (Nonvested Shares)	Number of Shares	Weighted Average Grant-Date Fair Value Per Share
Nonvested shares outstanding at January 1, 2022	723,983	$	21.83
Granted	92,437	27.64
Vested	(107,772)	23.05
Forfeited	(128,297)	22.35
Nonvested shares outstanding at June 18, 2022	580,351	$	23.27

Employee Stock Purchase Plan

As of June 18, 2022, the Company had reserved 51,718 shares of common stock available for purchase under the Employee Stock Purchase Plan. In the second quarter of fiscal 2022, employees purchased 4,794 shares of the Company’s common stock with a weighted average fair market value of $29.77 per share.

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(14)  EARNINGS PER SHARE

The following table reconciles the number of shares outstanding for the second quarter of fiscal 2022 and 2021, respectively, to the number of weighted average basic shares outstanding and the number of weighted average diluted shares outstanding for the purposes of calculating basic and diluted earnings per share:

	Second Quarter Ended,				First Half Ended,
(thousands, except per share amounts)	June 18, 2022		June 19, 2021		June 18, 2022		June 19, 2021
Net income	$	21,107	$	15,111	$	33,985	$	24,317
Weighted average basic shares outstanding	23,489		23,404		23,482		23,389
Dilutive shares for share–based compensation plans	155		161		158		148
Weighted average diluted shares outstanding	23,644		23,565		23,640		23,537
Net income per share: basic	$	0.90	$	0.65	$	1.45	$	1.04
Net income per share: diluted	$	0.89	$	0.64	$	1.44	$	1.03

(15)  FAIR VALUE MEASUREMENTS

Recurring Fair Value Measurements

The following tables summarize assets measured at fair value on a recurring basis (in millions) as of June 18, 2022:

	Quoted prices in active markets (Level 1)	Significant other observable inputs (Level 2)	Significant unobservable inputs (Level 3)	Fair Value Measurements
Equity Securities (1)	$—	$—	$3.0	$3.0

(1) Represents a $3.0 million investment the Company invested in its privately held battery recycling partner, HBR Retriev Holdco, LLC ("Retriev"). Retriev is a Limited Liability Company that is controlled by the Heritage Group, an affiliate of the Company.

(16)  OTHER (INCOME) EXPENSE - NET

Other (income) expense - net was $1.0 million of expense for the second quarter of fiscal 2022, compared to a net $(0.3) million of income in the second quarter of 2021. Other (income) expense - net was $0.8 million of expense for the first half of fiscal 2022, compared to $(0.4) million of income for the first half of fiscal 2021. The 2022 other expense includes approximately $1.1 million of net loss on disposal of assets.

(17)  SUBSEQUENT EVENTS

On June 29, 2022, the Company entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”) with Channel PES Acquisition Co., LLC, a Delaware limited liability company (“Seller”), for the acquisition of all of the issued and outstanding shares of the capital stock (the “Shares”) of Patriot Environmental Services, Inc., a California corporation (“Patriot”). The Stock Purchase Agreement provides that, upon the terms and subject to the conditions thereof, Buyer will acquire all of the Shares, on a cash-free, debt-free basis, for an aggregate cash consideration of approximately $156 million, subject to certain adjustments set forth in the Stock Purchase Agreement. The transaction is not subject to any financing condition or contingency, and the Company expects to fund the purchase price with cash on hand and using its existing credit facility (and, in connection therewith, exercising the accordion feature of such credit facility to increase the borrowing availability of such credit facility).

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Each party’s obligation to consummate the transactions contemplated by the Stock Purchase Agreement is subject to certain customary conditions, including (i) the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, (ii) the absence of any order issued by any governmental authority restraining, enjoining or otherwise making illegal the transactions contemplated by the Stock Purchase Agreement and (iii) the absence of any law which makes the consummation of such transactions illegal. Buyer’s obligation to consummate the transactions contemplated by the Stock Purchase Agreement is also conditioned on, among other things, the absence of a Material Adverse Effect (as defined in the Stock Purchase Agreement) having occurred since June 29, 2022.

Patriot is a leading provider of environmental services across the Western United States specializing in a wide variety of waste services, including emergency response, industrial services, and OSRO spill response. Patriot provides full-service environmental solutions to a wide variety of end markets, serving customers within manufacturing, agriculture, construction, healthcare, mining, oil & gas, transportation, and utilities markets. From custom on-site services to industrial waste disposal, as well as wastewater treatment, Patriot operates at eighteen locations in the western and southern United States.

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ITEM 2.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Disclosure Regarding Forward-Looking Statements

    You should read the following discussion in conjunction with our consolidated financial statements and related notes in our Annual Report on Form 10-K filed with the SEC on March 2, 2022. In addition to historical information, this discussion contains forward-looking statements that involve risks, uncertainties and assumptions that could cause actual results to differ materially from our expectations. These statements can be identified by the fact that they do not relate strictly to historical or current facts. They use words such as "aim," "anticipate," "believe," "could," "estimate," "expect," "intend," "may," "plan," "project," "should," "will be," "will continue," "will likely result," "would" and other words and terms of similar meaning in conjunction with a discussion of future or estimated operating or financial performance. You should read statements that contain these words carefully, because they discuss our future expectations, contain projections of our future results of operations or of our financial position or state other “forward-looking” information. Forward-looking statements speak only as of the date of this quarterly report. Factors that could cause such differences include those described in the section titled “Risk Factors” and elsewhere in our Annual Report on Form 10-K for fiscal 2021 filed with the SEC on March 2, 2022. Except as required under federal securities laws and the rules and regulations of the SEC, we do not have any intention, and do not undertake, to update any forward-looking statements to reflect events or circumstances arising after the date of this quarterly report, whether as a result of new information, future events or otherwise. As a result of these risks and uncertainties, readers are cautioned not to place undue reliance on the forward-looking statements included in this quarterly report or that may be made elsewhere from time to time by, or on behalf of, us. All forward-looking statements attributable to us are expressly qualified by these cautionary statements. Certain tabular information may not foot due to rounding. Our fiscal year ends on the Saturday closest to December 31. Interim results are presented for the twelve weeks ("second quarter" or "quarter") ended June 18, 2022 and June 19, 2021, respectively. "Fiscal 2021" represents the 52-week period ended January 1, 2022 and "Fiscal 2022" represents the 52-week period beginning January 2, 2022, and ending on December 31, 2022.

Overview

We provide parts cleaning, containerized waste management, used oil collection, wastewater vacuum, antifreeze recycling, and field services, and we own and operate a used oil re-refinery where we re-refine used lubricating oils into high quality lubricant base oil and other products. We are the second largest provider of industrial and hazardous waste services to small and mid-sized customers in both the vehicle maintenance and manufacturing industries, and we have the second largest used oil re-refining capacity in North America. Our services help our customers manage their used chemicals and liquid and solid wastes, while also helping to minimize their regulatory burdens. We operate from a network of 91 branch facilities providing services to customers in 48 states and parts of Canada. We conduct business through two principal operating segments: Environmental Services and Oil Business.

Our Environmental Services segment revenues are generated primarily from providing parts cleaning, containerized waste management, wastewater vacuum, antifreeze recycling, and field services. Revenues from this segment accounted for approximately 58.7% of our total Company revenues for the second quarter of fiscal 2022. In the Environmental Services segment, we define and measure same-branch revenues for a given period as the subset of all our branches that have been open and operating throughout and between the periods being compared, and we refer to these as established branches. We calculate average revenues per working day by dividing our revenues by the number of non-holiday weekdays in the applicable fiscal year or fiscal quarter.

Our Oil Business segment consists primarily of our used oil collection and used oil re-refining activities, along with our recycled fuel oil ("RFO") sales which together accounted for approximately 41.3% of our total Company revenues in the second quarter of fiscal 2022.

We have established prices for our services primarily based on the perceived value of those services in the marketplace. Our customer agreements typically provide for annual renewal and price increases. With respect to our oil product sales, some prices are set through contracts or purchase orders with customers, which may be based on the market prices of an underlying commodity or market indicator.

Our operating costs include the costs of obtaining the materials we use in our products and services, such as used oil collected from customers or purchased from third party collectors, solvent, and other chemicals. The used solvent that we retrieve from customers in our product reuse program is accounted for as a reduction in our net cost of solvent under operating costs, whether placed in inventory or sold to a purchaser for reuse. Changes in the price of crude oil can impact operating costs indirectly as it may impact the price we pay for solvent or used oil, although we attempt to offset volatility in the oil markets by

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managing the spread between the costs we incur to obtain our materials and the prices we charge for our products and services. Operating costs also include transportation of solvents and waste, payments to third parties to recycle or dispose of the waste materials that we collect, and the costs of operating our re-refinery, recycling centers, non-hazardous waste processing facilities, hubs, and branch system including personnel costs (including commissions), facility rent, truck leases, fuel, and maintenance. Our operating costs as a percentage of revenues generally increase in relation to the number of new branch openings. As new branches achieve route density and scale efficiencies, our operating costs as a percentage of revenues generally decrease.

We use profit before corporate selling, general, and administrative expenses ("SG&A") as a key measure of segment profitability. We define profit before corporate SG&A expense as revenue less operating costs and depreciation and amortization from operations.

Our selling, general, and administrative expenses include the costs of performing centralized business functions, including sales management at or above the regional level, business management and marketing, billing, receivables management, accounting and finance, internal audit, logistics management beyond the branch level, environmental health and safety, human resources, and legal.

We operate a used oil re-refinery located in Indianapolis, Indiana, through which we recycle used oil into high quality lubricant base oil and other products. We supply the base oil to firms that produce and market finished lubricants. Our re-refinery has an annual nameplate capacity of approximately 75 million gallons of used oil feedstock (depending on the quality of the feedstock), allowing it to produce approximately 50 million gallons of lubricating base oil per year when operating at full capacity.

Critical Accounting Policies

Critical accounting policies are those that are both important to the accurate portrayal of a company’s financial condition and results and require subjective or complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain.

In order to prepare financial statements that conform to accounting principles generally accepted in the United States, commonly referred to as GAAP, we make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes. Certain estimates are particularly sensitive due to their significance to the financial statements and the possibility that future events may be significantly different from our expectations.

There were no material changes during the second quarter of fiscal 2022 to the information provided under the heading "Critical Accounting Policies" included in our Annual Report on Form 10-K for the fiscal year ended January 1, 2022.

Impact of the COVID-19 Pandemic on Our Business

We are closely monitoring the spread and impact of the COVID-19 pandemic and are continually assessing its potential effects on our business and our financial performance as well as the businesses of our customers and vendors. The Company cannot predict the duration or severity of the COVID-19 pandemic, and we cannot reasonably estimate the financial impact the COVID-19 outbreak will have on our results and significant estimates going forward.

The ultimate impact of the COVID-19 pandemic on our business, results of operations, financial condition and cash flows is highly uncertain and cannot be accurately predicted and is dependent on future developments, including the duration of the pandemic and the related length of its impact on the global economy, and any new information that may emerge concerning the COVID-19 outbreak and the actions to contain it or treat its impact. In fiscal 2021, the continued impact on our business as a result of COVID-19 pandemic resulted in additional lost work hours which negatively impacted our ability to service our customers on a timely basis, the effect of which is included in the fiscal 2021 financial operations in this filing. Although no material impact on our business occurred during the second quarter of 2022, the continued impact on our business as a result of the COVID-19 pandemic could result in a material adverse effect on our business, results of operations, financial condition, prospects and the trading prices of our securities in the near-term and throughout 2022.

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RESULTS OF OPERATIONS

General

The following table sets forth certain operating data as a percentage of revenues for the periods indicated:

	Second Quarter Ended,								First Half Ended,
(thousands)	June 18, 2022				June 19, 2021				June 18, 2022				June 19, 2021
Revenues
Service revenues	$	75,583	48.3	%	$	60,033	51.2	%	$	144,490	48.8	%	$	117,732	52.9	%
Product revenues	74,790		47.7	%	51,551		44.0	%	139,272		47.0	%	93,817		42.1	%
Rental income	6,274		4.0	%	5,695		4.9	%	12,251		4.1	%	11,111		5.0	%
Total revenues	$	156,647	100.0	%	$	117,279	100.0	%	$	296,013	100.0	%	$	222,660	100.0	%
Operating expenses
Operating costs	$	104,755	66.9	%	$	78,329	66.8	%	$	206,538	69.8	%	$	155,099	69.7	%
Selling, general, and administrative expenses	15,024		9.6	%	13,039		11.1	%	28,759		9.7	%	25,228		11.3	%
Depreciation and amortization	6,777		4.3	%	5,619		4.8	%	13,285		4.5	%	9,401		4.2	%
Other expense (income) - net	1,001		0.6	%	(330)		(0.3)	%	791		0.3	%	(439)		(0.2)	%
Operating income	29,090		18.6	%	20,622		17.6	%	46,640		15.8	%	33,371		15.0	%
Interest expense – net	250		0.2	%	177		0.2	%	473		0.2	%	501		0.2	%
Income before income taxes	28,840		18.4	%	20,445		17.4	%	46,167		15.6	%	32,870		14.8	%
Provision for income taxes	7,733		4.9	%	5,334		4.5	%	12,182		4.1	%	8,553		3.8	%
Net income	$	21,107	13.5	%	$	15,111	12.9	%	$	33,985	11.5	%	$	24,317	10.9	%

Revenues

Revenue for the second quarter of 2022 was $156.6 million compared to $117.3 million for the same quarter of 2021, an increase of $39.4 million, or 33.6%. The $39.4 million increase in revenue was mainly driven by higher base oil selling prices, increased demand and higher selling prices for our environmental services products and services and, to a lesser extent, by revenue from acquisitions made during the second half of 2021. For the first half of fiscal 2022, revenues increased $73.4 million, or 33.0%, from $222.7 million in the first half of fiscal 2021 to $296.0 million in the first half of 2022 mainly driven by the above mentioned factors.

Operating costs

Operating costs increased $26.4 million, or 33.7%, during the second quarter of 2022 compared to the second quarter of fiscal 2021 mainly due to higher used oil feedstock costs as well as higher disposal costs and transportation related expenses. Operating costs increased $51.4 million, or 33.1%, in the first half of fiscal 2022 compared to the first half of fiscal 2021 mainly due to the above mentioned factors.

We expect that in the future our operating costs in both the Environmental Services and Oil Business segments may increase or decrease depending on our product and service volumes and changes in commodity pricing, along with other factors.

Selling, general, and administrative expenses

Selling, general, and administrative expenses increased $2.0 million, or 15.2%, from the second quarter of fiscal 2021 to the second quarter of fiscal 2022 mainly due to higher salaries and benefits, depreciation and amortization, and a provision for a potential settlement of a U.S. EPA complaint (see the Legal Proceedings section of this filing for more information). Selling, general, and administrative expenses increased $3.5 million, or 13.9%, from the first half of fiscal 2021 to the first half of fiscal 2022 due to the above mentioned factors.

Other (income) expense - net

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Other (income) expense - net was $1.0 million of expense for the second quarter of fiscal 2022, compared to a net $(0.3) million of income in the second quarter of 2021. Other (income) expense - net was $0.8 million of expense for the first half of fiscal 2022, compared to a net $(0.4) million of income for the first half of fiscal 2021. The 2022 other expense includes approximately $1.1 million of net loss on disposal of assets.

Interest expense - net

Interest expense - net for the second quarter of fiscal 2022 and fiscal 2021 was $0.3 million and $0.2 million, respectively. Interest expense - net for the first half of fiscal 2022 and 2021 was $0.5 million and $0.5 million respectively.

Provision for income taxes

The Company's effective income tax rate for the second quarter of fiscal 2022 was 27.0% compared to 26.1% in the second quarter of fiscal 2021. The Company’s effective tax rate for the first half of fiscal 2022 was 26.4% compared to 26.0% in the first half of 2021. The rate increases are principally attributable to the increased impact of certain adjustments to federal taxable income as compared to the first half of fiscal 2021.

Segment Information

The following table presents revenues by reportable segment:

		Second Quarter Ended,				Change
(thousands)		June 18, 2022		June 19, 2021		$		%
Revenues:
	Environmental Services	$	91,878	$	72,716	$	19,162	26.4	%
	Oil Business	64,769		44,563		20,206		45.3	%
	Total	$	156,647	$	117,279	$	39,368	33.6	%

	First Half Ended,				Change
(thousands)	June 18, 2022		June 19, 2021		$		%
Revenues:
Environmental Services	$	176,529	$	142,173	$	34,356	24.2	%
Oil Business	119,484		80,487		38,997		48.5	%
Total	$	296,013	$	222,660	$	73,353	32.9	%

In the second quarter of fiscal 2022, Environmental Services revenue was $91.9 million compared to $72.7 million during the second quarter of fiscal 2021. The 26.4% increase in revenue was mainly due to the continued increase in demand and higher prices for our services compared to the prior year quarter and, to a lesser extent, revenue from companies acquired during the second-half of 2021. We experienced revenue increases across all service lines in the segment when compared to the second quarter of 2021. For the first half of fiscal 2022, Environmental Services revenue was $176.5 million, compared to $142.2 million during the first half of fiscal 2021.The 24.2% increase in revenue was mainly due to the above mentioned factors.

During the second quarter of fiscal 2022, Oil Business revenue of $64.8 million represents an increase of $20.2 million, or 45.3%, compared to $44.6 million in the second quarter of fiscal 2021. An increase in base oil prices was the main driver of the increase in revenue compared to the prior year quarter. For the first half of fiscal 2022, Oil Business revenues were $119.5 million, compared to $80.5 million during the first half of fiscal 2021. The increase in revenue was driven primarily by the above mentioned factors.

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Segment Profit Before Corporate Selling, General and Administrative Expenses ("SG&A")

The following table presents profit by reportable segment before corporate SG&A expense:

		Second Quarter Ended,				Change
(thousands)		June 18, 2022		June 19, 2021		$		%
Profit before corporate SG&A*
	Environmental Services	$	19,772	$	19,167	$	605	3.2%
	Oil Business	26,802		15,244		11,558		75.8%
	Total	$	46,574	$	34,411	$	12,163	35.3%

		First Half Ended,				Change
(thousands)		June 18, 2022		June 19, 2021		$		%
Profit before corporate SG&A*
	Environmental Services	$	33,916	$	35,166	$	(1,250)	(3.6)%
	Oil Business	45,269		25,329		19,940		N/M
	Total	$	79,185	$	60,495	$	18,690	30.9%

*Includes depreciation and amortization related to operating activity but not depreciation and amortization related to corporate selling, general, and administrative activity. For further discussion see Note 11 in our consolidated financial statements included elsewhere in this document.

Environmental Services profit before corporate SG&A expense increased $0.6 million, or 3.2%, in the second quarter of fiscal 2022 compared to the second quarter of fiscal 2021. The improvement in profitability was mainly driven by higher dollar increase in revenue compared to the increase in operating expenses. Our operating margin percentage for second quarter of 2022 was 21.5% compared to 26.4% in the second quarter of 2021. The decrease in operating margin was mainly driven by higher disposal and transportation costs caused by extraordinary high inflation.

Environmental Services profit before corporate SG&A expense decreased $1.3 million, or 3.6%, in the first half of fiscal 2022 compared to the first half of fiscal 2021. Operating margin for first half of 2022 was 19.2% compared to 24.7% in the first half of 2021. The decrease in operating margin was mainly driven by higher disposal, transportation and container costs caused by extraordinary high inflation.

Oil Business profit before corporate SG&A expense increased $11.6 million, or 75.8% in the second quarter of fiscal 2022 compared to the second quarter of fiscal 2021. Our Oil Business segment operating margin percentage increased to 41.4% in the second quarter of 2022 compared to 34.2% in the second quarter of fiscal 2021. The higher operating margin compared to the second quarter of 2021 was mainly due to an increase in the spread between the netback (sales price net of freight impact) on our base oil sales and the price paid/charged to our customers for the removal of their used oil.

Oil Business profit before corporate SG&A expense increased $19.9 million in the first half of fiscal 2022 compared to the first half of fiscal 2021. The factors which drove the improvement during the second quarter were primarily responsible for the improvement in profitability during the first half of fiscal 2022 compared to the first half of fiscal 2021.

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FINANCIAL CONDITION

Liquidity and Capital Resources

Cash and Cash Equivalents

As of June 18, 2022 and January 1, 2022, cash and cash equivalents were $73.8 million and $56.3 million, respectively. Our primary sources of liquidity are cash flows from operations and funds available to borrow under our revolving bank credit facility.

Debt and Financing Arrangements    

On March 18, 2021, Heritage-Crystal Clean, LLC, (the “Company”), entered into an Amended and Restated Credit Agreement (the "Agreement"), by and among the Company, its parent, Heritage-Crystal Clean, Inc., and the Company’s subsidiaries identified therein and Bank of America, N.A., as administrative agent, JPMorgan Chase Bank, N.A., and Wells Fargo Bank, National Association. The Agreement replaces the Company's previous Credit Agreement dated as of February 21, 2017. During the first quarter of fiscal 2021 the Company paid down its previous term loan, in full, of $30.0 million. The Agreement provides for borrowings of up to $100.0 million, in the form of a revolving facility, of which $15 million can be used in the form of a Swing Line loan. The Agreement also provides for up to an additional $50.0 million of borrowings using an accordion feature upon approval of the lenders.

Loans made under the Agreement, as amended, may be Base Rate Loans or LIBOR Rate Loans, at the election of the Borrower subject to certain exceptions. Base Rate Loans have an interest rate equal to (i) the higher of (a) the federal funds rate plus 0.5%, (b) the London Interbank Offering Rate (“LIBOR”) plus 1%, or (c) Bank of America's prime rate, plus (ii) a variable margin of between 0.50% and 1.25% depending on the Company's total leverage ratio, calculated on a consolidated basis. LIBOR rate loans have an interest rate equal to (i) the LIBOR rate plus (ii) a variable margin of between 1.50% and 2.25% depending on the Company's total leverage ratio. Amounts borrowed under the Agreement are secured by a security interest in substantially all of the Company's tangible and intangible assets. The Company incurred $0.8 million of debt issuance costs related to the amended credit agreement.

The Credit Agreement contains customary terms and provisions (including representations, covenants, and conditions) for transactions of this type. Certain covenants, among other things, restrict the Company's and its subsidiaries' ability to incur indebtedness, grant liens, make investments and sell assets. The Credit Agreement also contains customary events of default, covenants and representations and warranties. Financial covenants include:

•An interest coverage ratio (based on interest expense and EBITDA) of at least 3.5 to 1.0;

•A total leverage ratio no greater than 3.0 to 1.0, provided that in the event of a permitted acquisition having an aggregate consideration equal to $10.0 million or more, at the Borrower’s election, the foregoing 3.00 to 1.00 shall be deemed to be 3.50 to 1.00 for the fiscal quarter in which such permitted acquisition occurs and the three immediately following fiscal quarters and will thereafter revert to 3.00 to 1.00.

The Credit Agreement places certain limitations on acquisitions and the payment of dividends.

On July 27, 2017, the Financial Conduct Authority, which regulates LIBOR, announced that it intends to phase out the London Interbank Offered Rate by the end of 2021. Subsequently the phase out deadline was extended to June 30, 2023. We expect that widespread use of LIBOR will transition to alternative interest rates in the near future. Since loans made under our Credit Agreement may be LIBOR based loans, the phasing out of LIBOR may adversely affect interest rates that could result in higher borrowing costs and higher interest expense. As the Company does not have any outstanding borrowings under the financial instruments impacted by LIBOR, the effect on the financial statements is not material.

As of June 18, 2022 and January 1, 2022, the Company, had $6.7 million and $5.6 million, of standby letters of credit issued, respectively, and $93.3 million and $94.4 million was available for borrowing under the bank credit facility, respectively.

We believe that our existing cash, cash equivalents, available borrowings, and other sources of financings will be sufficient to meet our anticipated cash needs for working capital and capital expenditures for at least the next 12 months. We cannot assure you that this will be the case or that our assumptions regarding revenues and expenses underlying this belief will be

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accurate. If, in the future, we require more liquidity than is available to us under our credit facility, we may need to raise additional funds through debt or equity offerings. Adequate funds may not be available when needed or may not be available on terms favorable to us. If additional funds are raised by issuing equity securities, dilution to existing stockholders may result. If we raise additional funds by obtaining loans from third parties, the terms of those financing arrangements may include negative covenants or other restrictions on our business that could impair our operational flexibility, and would also require us to fund additional interest expense. If funding is insufficient at any time in the future, we may be unable to develop or enhance our products or services, take advantage of business opportunities, or respond to competitive pressures, any of which could have a material adverse effect on our business, financial condition and results of operations.

We expect to draw approximately $100 million of indebtedness pursuant to our Credit Agreement to finance the pending Acquisition discussed in note 17. The terms of this indebtedness will contain limitations on the amount of additional indebtedness that we and our subsidiaries may incur and may place other restrictions on the operation of our business. The indebtedness will require interest and principal payments and may impact our future operations.

Summary of Cash Flow Activity

	First Half Ended,
(thousands)	June 18, 2022		June 19, 2021
Net cash provided by (used in):
Operating activities	$	39,168	$	41,343
Investing activities	(18,840)		(9,393)
Financing activities	(2,837)		(32,253)
Net increase (decrease) in cash and cash equivalents	$	17,491	$	(303)

The most significant items affecting the comparison of our operating activities for the first half of fiscal 2022 and the first half of fiscal 2021 are summarized below:

Net Cash Provided by Operating Activities —

•Earnings — Our increase in net income during the first half of 2022 favorably impacted our net cash provided by operating activities by $9.7 million compared to the first half of 2021.

•Accounts Receivable — The increase in accounts receivable had an unfavorable impact on cash provided by operating activities of $6.7 million compared to the increase in accounts receivable during in the first half of fiscal 2021.

•Accounts Payable — The increase in accounts payable had a favorable impact on cash provided by operating activities of $5.9 million in the first half of fiscal 2022.

 Net Cash Used in Investing Activities —

•Capital expenditures — We made capital expenditures as follows:

	First Half Ended,
(millions)	June 18, 2022		June 19, 2021
Re-refinery capital improvements	$	4.1	$	2.2
Trucks and trailers	2.9		3.7
Parts cleaning machines	2.9		2.2
Branch replacements and facility improvements	3.1		—
IT projects	0.2		0.1
Various other projects	2.7		2.7
Total	$	15.9	$	10.9

•Investments — During the first half of 2022, the Company invested 3.0 million in its battery recycling partner, HBR Retriev Holdco, LLC ("Retriev"). Retriev is a Limited Liability Company that is controlled by the Heritage Group, an affiliate of the Company.

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Net Cash Used in Financing Activities — During the first half of fiscal 2021 the Company paid down its previous term loan, in full, of $30.0 million.

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ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to interest rate risks primarily through borrowings under our bank Credit Facility. Interest on this facility is based upon variable interest rates. We had no borrowings under our Credit Facility during the second quarter of fiscal 2022. We currently do not hedge against interest rate risk. Based on the foregoing, a hypothetical 1% increase or decrease in interest rates would have resulted in no change to our interest expense in the second quarter of fiscal 2022.

ITEM 4.  CONTROLS AND PROCEDURES

The Company's Chief Executive Officer and Chief Financial Officer have concluded, based on their evaluation as of the end of the period covered by this report, that the Company's disclosure controls and procedures (as defined in the Securities Exchange Act of 1934 Rules 13a-15(e) and 15d-15(e)) are effective to ensure that information required to be disclosed in the reports that the Company files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial

Officer, as appropriate, to allow timely decisions regarding financial disclosures.

Changes in Internal Control Over Financial Reporting

There have been no changes in the Company’s internal controls over financial reporting during the second quarter ended June 18, 2022 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II

ITEM 1. LEGAL PROCEEDINGS

Environmental Matters

On January 19, 2022, a civil enforcement action was filed in the United States District Court for the Northern District of Illinois, Civil Action No. 1:22-cv-00303: United States of America, Louisiana Department of Environmental Quality, and the State of Indiana vs. Heritage-Crystal Clean, LLC (the “Action”). The Action alleges that the Company’s spent solvent recycling programs violate sections 3008(a) and (g) of the Resource Conservation and Recovery Act (“RCRA”), 42 U.S.C. § 6928(a) and (g), and Indiana Code Section 13-30-4-1, including that the Company’s used 106 solvent program is not exempt under RCRA, and that some of the waste received by the Company under its non-hazardous 142 solvent program included hazardous waste. The Action further alleges that the Company’s storage and handling of used oil at its Shreveport, Louisiana location was not in full compliance with Louisiana environmental laws. The plaintiffs seek civil penalties in an undetermined amount, injunctive relief, and modifications made in the Company’s solvent recycling programs and used oil handling services. The Company is in discussions with members of the U.S. Department of Justice, U.S. Environmental Protection Agency, Louisiana Department of Environmental Quality, and Indiana Department of Environmental Management to resolve the Action but cannot predict the outcome of these discussions. As of June 18, 2022, the Company has accrued $750,000 related to this Action.

ITEM 1A. RISK FACTORS

Reference is made to the factors set forth under the caption “Disclosure Regarding Forward-Looking Statements” in Part I, Item 2 of this quarterly report on Form 10-Q and other risk factors described in our annual report on Form 10-K for fiscal 2021 filed with the SEC on March 2, 2022, which are incorporated herein by reference. There have not been any material changes to the risk factors previously disclosed in our annual report on Form 10-K for fiscal 2021, except as set forth below.

Our proposed acquisition of Patriot Environmental Services, Inc. is subject to conditions, some or all of which may not be satisfied, or completed on a timely basis, if at all. Failure to complete the proposed acquisition could have adverse effects on our business.

The completion of the pending acquisition (the “Acquisition”) of Patriot Environmental Services, Inc. (“Patriot”) is subject to a number of risks conditions, including (i) the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, (ii) the absence of any order issued by any governmental authority restraining, enjoining or otherwise making illegal the transactions contemplated by the Acquisition and (iii) the absence of any law which makes the consummation of such transactions illegal. Also, either we or Patriot may terminate the stock purchase agreement governing the Acquisition if the Acquisition is not consummated by October 1, 2022, subject to certain conditions. If we are not able to complete the Acquisition, we may experience negative reactions from the financial markets or from our customers or employees. We will be required to pay our costs relating to the Acquisition, such as legal, accounting, financial advisory and printing fees, whether or not the Acquisition is completed. In addition, if the Acquisition is not completed, we could be subject to litigation related to any failure to complete the Acquisition or related to any enforcement proceeding commenced against us to perform our obligations under the stock purchase agreement governing the Acquisition. If any such risk materializes, it could adversely impact our ongoing business. Similarly, delays in the completion of the Acquisition could, among other things, result in additional transaction costs, loss of revenue or other negative effects associated with uncertainty about completion of the Acquisition and cause us not to realize some or all of the benefits that we expect to achieve if the Acquisition is completed as contemplated within its expected timeframe. We cannot assure you that the conditions to the closing of the Acquisition will be satisfied or waived or that the Acquisition will be consummated.

We may not be able to realize the anticipated benefits from our pending Acquisition of Patriot Environmental Services, Inc.

We may not be able to realize the anticipated benefits from our pending Acquisition of Patriot. Achieving those benefits depends on the timely, efficient and successful execution of a number of post-acquisition events, including integrating Patriot’s businesses into our company. Factors that could affect our ability to achieve these benefits include:

•The failure of Patriot’s businesses to perform in accordance with our expectations;

•Difficulties in integrating and managing personnel, financial reporting and other systems used by Patriot’s businesses into our company;

•Any future goodwill impairment charges that we may incur with respect to the assets of Patriot;

•Failure to achieve anticipated synergies between our business units and the business units of Patriot;

•The loss of Patriot’s customers or our customers; and

•The loss of any of the key employees of Patriot or our company.

38

If Patriot’s businesses do not operate as we anticipate, it could materially harm our business, financial condition and results of operations. As part of the pending Acquisition, we will assume all of Patriot’s liabilities. We may learn additional information about Patriot’s business that adversely affects us, such as unknown or contingent liabilities, issues relating to internal controls over financial reporting and issues relating to compliance with the Sarbanes-Oxley Act or other applicable laws. As a result, there can be no assurance that the Acquisition will be successful or will not, in fact, harm our business. Among other things, if Patriot’s liabilities are greater than projected, or if there are obligations of Patriot of which we are not aware at the time of completion of the Acquisition, our business could be materially adversely affected.

The successful integration of Patriot’s businesses into our company following the Patriot Acquisition will present significant challenges.

We anticipate that the Acquisition will place significant demands on our administrative, operational and financial resources, and we cannot assure you that we will be able to successfully integrate Patriot’s businesses into our company. Our failure to successfully integrate Patriot with our company, and to manage the challenges presented by the integration process successfully, may prevent us from achieving the anticipated benefits of the acquisition and could have a material adverse effect on our business.

We expect to incur significant indebtedness in connection with our Acquisition of Patriot, which could harm our operating flexibility and competitive position.

We expect to draw approximately $100 million of indebtedness to finance the Acquisition pursuant to our Credit Agreement. The terms of this indebtedness will contain limitations on the amount of additional indebtedness that we and our subsidiaries may incur and place other restrictions on the operation of our business. The indebtedness will require interest and principal payments. Our level of debt as a result of the Acquisition and the limitations imposed on us by our Credit Agreement could adversely affect our operating flexibility and put us at a competitive disadvantage. Our substantial debt level may adversely affect our future performance, because, among other things:

• We may be placed at a competitive disadvantage relative to our competitors, some of which may have lower debt service obligations and greater financial resources than we do;

•Our ability to complete future acquisitions may be limited;

•We will have to use a portion of our cash flow for debt service rather than for operations;

•We may not be able to obtain further debt financing beyond our expanded credit agreement;

•We may not be able to take advantage of future business opportunities;

•The indebtedness may bear interest at variable interest rates, making us vulnerable to increases in interest rates; and

•We may be more vulnerable to adverse economic conditions.

Our ability to make scheduled payments of principal, to pay interest on, or to refinance our indebtedness and to satisfy our finance lease obligations will depend upon our future operating performance, which may be affected by factors beyond our control. In addition, there can be no assurance that future borrowings or equity financing will be available to us on favorable terms or at all for the payment or refinancing of our indebtedness. If we are unable to service our indebtedness, our business, financial condition and results of operations would be materially adversely affected.

ITEM 6.  EXHIBITS

2.1	Stock Purchase Agreement, dated as of June 29, 2022, by and between Heritage-Crystal Clean, LLC and Channel PES Acquisition Co., LLC (incorporated by reference to the Current Report on Form 8-K as filed with the SEC on June 30, 2022)+
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer pursuant to 18 U.S. Code Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Chief Financial Officer pursuant to 18 U.S. Code Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*	XBRL Instance Document
101.SCH*	XBRL Taxonomy Extension Schema Document
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB*	XBRL Taxonomy Extension Label Linkbase Document
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF*	XBRL Taxonomy Extension Definition Linkbase Document

39

+Schedules, annexes and exhibits have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The Company agrees to furnish supplementally to the SEC a copy of any omitted schedule, annex or exhibit upon request.

*In accordance with Regulation S-T, the XBRL-related information in Exhibits 101 to this Quarterly Report on Form 10-Q shall be deemed to be "furnished" and not "filed."

40

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

HERITAGE-CRYSTAL CLEAN, INC.

Date:	July 27, 2022	By:	/s/ Mark DeVita
			Mark DeVita
			Chief Financial Officer

41

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF PRESIDENT AND CEO — PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO RULES 13a-14(A) AND 15d-14(A)

OF THE SECURITIES EXCHANGE ACT OF 1934

I, Brian Recatto, certify that:

1.I have reviewed this report on Form 10-Q of Heritage-Crystal Clean, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 27, 2022	By: /s/ Brian Recatto
	Brian Recatto
	President, CEO and Director — Principal Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO RULES 13a-14(A) AND 15d-14(A)

OF THE SECURITIES EXCHANGE ACT OF 1934

I, Mark DeVita, certify that:

1.I have reviewed this report on Form 10-Q for Heritage-Crystal Clean, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 27, 2022	By: /s/ Mark DeVita
	Mark DeVita
	Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Report of HERITAGE-CRYSTAL CLEAN, INC. (the “Company”) on Form 10-Q for the period ended June 18, 2022, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brian Recatto, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: July 27, 2022	By: /s/ Brian Recatto
	Brian Recatto
	President, CEO and Director — Principal Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Report of HERITAGE-CRYSTAL CLEAN, INC. (the “Company”) on Form 10-Q for the period ended June 18, 2022, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mark DeVita, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: July 27, 2022	By: /s/ Mark DeVita
	Mark DeVita
	Chief Financial Officer

XML

Cover - shares	6 Months Ended
	Jun. 18, 2022	Jul. 26, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 18, 2022
Document Transition Report	false
Entity File Number	001-33987
Entity Registrant Name	HERITAGE-CRYSTAL CLEAN, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-0351454
Entity Address, Address Line One	2175 Point Boulevard
Entity Address, Address Line Two	Suite 375
Entity Address, City or Town	Elgin
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60123
City Area Code	847
Local Phone Number	836-5670
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	HCCI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		24,170,679
Entity Central Index Key	0001403431
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 18, 2022	Jan. 01, 2022
Current assets:
Cash and cash equivalents	$ 73,760	$ 56,269
Accounts receivable - net	80,266	62,513
Inventory - net	36,221	29,536
Assets held for sale	1,125	1,125
Other current assets	4,427	6,773
Total current assets	195,799	156,216
Property, plant and equipment - net	171,169	166,301
Right of use assets	89,541	83,865
Equipment at customers - net	25,107	24,146
Software and intangible assets - net	44,610	45,949
Goodwill	49,695	49,695
Investments at fair value	3,000	0
Other assets	616	692
Total assets	579,537	526,864
Current liabilities:
Accounts payable	45,043	36,179
Current portion of lease liabilities	22,576	20,146
Contract liabilities - net	2,646	2,094
Accrued salaries, wages, and benefits	7,669	8,980
Taxes payable	8,503	8,474
Other current liabilities	11,177	9,476
Total current liabilities	97,614	85,349
Lease liabilities, net of current portion	70,391	65,041
Other long term liabilities	710	473
Contingent consideration	1,410	2,819
Deferred income taxes	32,070	31,126
Total liabilities	202,195	184,808
STOCKHOLDERS' EQUITY:
Common stock - 26,000,000 shares authorized at $0.01 par value, 23,494,045 and 23,473,931 shares issued and outstanding at June 18, 2022 and January 1, 2022, respectively	235	235
Additional paid-in capital	206,296	204,920
Retained earnings	171,052	137,067
Accumulated other comprehensive loss	(241)	(166)
Total stockholders' equity	377,342	342,056
Total liabilities and stockholders' equity	$ 579,537	$ 526,864

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 18, 2022	Jan. 01, 2022
Statement of Financial Position [Abstract]
Common stock, shares authorized (in shares)	26,000,000	26,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	23,494,045	23,473,931
Common stock, shares outstanding (in shares)	23,494,045	23,473,931

XML

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021
Revenues
Revenues	$ 150,373	$ 111,584	$ 283,762	$ 211,549
Rental income	6,274	5,695	12,251	11,111
Total revenues	156,647	117,279	296,013	222,660
Operating expenses
Operating costs	104,755	78,329	206,538	155,099
Selling, general, and administrative expenses	15,024	13,039	28,759	25,228
Depreciation and amortization	6,777	5,619	13,285	9,401
Other expense (income) - net	1,001	(330)	791	(439)
Operating income	29,090	20,622	46,640	33,371
Interest expense – net	250	177	473	501
Income before income taxes	28,840	20,445	46,167	32,870
Provision for income taxes	7,733	5,334	12,182	8,553
Net income	$ 21,107	$ 15,111	$ 33,985	$ 24,317
Net income per share: basic (in dollars per share)	$ 0.90	$ 0.65	$ 1.45	$ 1.04
Net income per share: diluted (in dollars per share)	$ 0.89	$ 0.64	$ 1.44	$ 1.03
Number of weighted average shares outstanding: basic (in shares)	23,489	23,404	23,482	23,389
Number of weighted average shares outstanding: diluted (in shares)	23,644	23,565	23,640	23,537
Service revenues
Revenues
Revenues	$ 75,583	$ 60,033	$ 144,490	$ 117,732
Product revenues
Revenues
Revenues	$ 74,790	$ 51,551	$ 139,272	$ 93,817

XML

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 21,107	$ 15,111	$ 33,985	$ 24,317
Other comprehensive loss:
Currency translation adjustments	(121)	0	(75)	0
Total other comprehensive loss:	(121)	0	(75)	0
Comprehensive income	$ 20,986	$ 15,111	$ 33,910	$ 24,317

XML

Condensed Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid–in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Jan. 02, 2021		23,340,700
Beginning balance at Jan. 02, 2021	$ 277,500	$ 233	$ 201,148	$ 76,119	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,317			24,317
Currency translation adjustment	0
Issuance of common stock – ESPP (in shares)		10,822
Issuance of common stock – ESPP	247		247
Share-based compensation (in shares)		59,084
Share-based compensation	2,691	$ 1	2,690
Share repurchases to satisfy tax withholding obligations	(729)		(729)
Ending balance (in shares) at Jun. 19, 2021		23,410,606
Ending balance at Jun. 19, 2021	304,026	$ 234	203,356	100,436	0
Beginning balance (in shares) at Mar. 27, 2021		23,390,434
Beginning balance at Mar. 27, 2021	287,317	$ 234	201,758	85,325	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,111			15,111
Currency translation adjustment	0
Issuance of common stock – ESPP (in shares)		4,750
Issuance of common stock – ESPP	126		126
Share-based compensation (in shares)		15,422
Share-based compensation	1,472		1,472
Ending balance (in shares) at Jun. 19, 2021		23,410,606
Ending balance at Jun. 19, 2021	$ 304,026	$ 234	203,356	100,436	0
Beginning balance (in shares) at Jan. 01, 2022	23,473,931	23,473,931
Beginning balance at Jan. 01, 2022	$ 342,056	$ 235	204,920	137,067	(166)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	33,985			33,985
Currency translation adjustment	(75)				(75)
Issuance of common stock – ESPP (in shares)		8,627
Issuance of common stock – ESPP	251		251
Share-based compensation (in shares)		11,487
Share-based compensation	2,527		2,527
Share repurchases to satisfy tax withholding obligations	$ (1,402)		(1,402)
Ending balance (in shares) at Jun. 18, 2022	23,494,045	23,494,045
Ending balance at Jun. 18, 2022	$ 377,342	$ 235	206,296	171,052	(241)
Beginning balance (in shares) at Mar. 26, 2022		23,477,764
Beginning balance at Mar. 26, 2022	356,450	$ 235	206,390	149,945	(120)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,107			21,107
Currency translation adjustment	(121)				(121)
Issuance of common stock – ESPP (in shares)		4,794
Issuance of common stock – ESPP	134		134
Share-based compensation (in shares)		11,487
Share-based compensation	1,174		1,174
Share repurchases to satisfy tax withholding obligations	$ (1,402)		(1,402)
Ending balance (in shares) at Jun. 18, 2022	23,494,045	23,494,045
Ending balance at Jun. 18, 2022	$ 377,342	$ 235	$ 206,296	$ 171,052	$ (241)

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021	Jan. 01, 2022
Cash flows from Operating Activities:
Net income	$ 21,107	$ 15,111	$ 33,985	$ 24,317
Depreciation and amortization	6,777	5,619	13,285	9,401
Provision for civil action settlement			750	0
Uncollectible provision			453	567	$ 1,930
Share-based compensation			2,785	2,886
Deferred taxes			944	8,612
Other, net			1,099	(30)
Changes in operating assets and liabilities:
(Increase) in accounts receivable			(18,207)	(11,481)
(Increase) in inventory			(6,685)	(978)
Decrease in other current assets			2,345	2,948
Increase in accounts payable			8,091	2,149
Increase in accrued liabilities			323	2,952
Cash provided by operating activities			39,168	41,343
Cash flows from Investing Activities:
Capital expenditures			(15,936)	(10,926)
Proceeds from sale of assets			96	1,533
Investment in Retriev			(3,000)	0
Cash used in investing activities			(18,840)	(9,393)
Cash flows from Financing Activities:
Payment of Term Loan			0	(30,000)
Debt Issuance Costs			0	(822)
Repayment of principal on finance leases			(1,686)	(949)
Share repurchases to satisfy tax withholding obligations			(1,402)	(729)
Proceeds from the issuance of common stock			251	247
Cash used in financing activities			(2,837)	(32,253)
Net increase (decrease) in cash and cash equivalents			17,491	(303)
Cash and cash equivalents, beginning of period			56,269	67,575	67,575
Cash and cash equivalents, end of period	$ 73,760	$ 67,272	73,760	67,272	$ 56,269
Supplemental disclosure of cash flow information:
Income taxes paid			11,796	637
Cash paid for interest			140	108
Supplemental disclosure of non-cash information:
Payables for construction in progress			$ 874	$ 375

XML

ORGANIZATION AND NATURE OF OPERATIONS

6 Months Ended

Jun. 18, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

ORGANIZATION AND NATURE OF OPERATIONS

ORGANIZATION AND NATURE OF OPERATIONS

Heritage-Crystal Clean, Inc., a Delaware corporation and its subsidiaries (collectively the “Company”), provide parts cleaning, hazardous and non-hazardous containerized waste, used oil collection, wastewater vacuum, antifreeze recycling and field services primarily to small and mid-sized industrial and vehicle maintenance customers. The Company owns and operates a used oil re-refinery where it re-refines used oils and sells high quality base oil for use in the manufacture of finished lubricants as well as other re-refinery products. The Company also has multiple locations where it dehydrates used oil. The oil processed at these locations is primarily sold as recycled fuel oil. The Company also operates multiple non-hazardous waste processing facilities as well as antifreeze recycling facilities at which it produces virgin-quality antifreeze. The Company's locations are in the United States and Ontario, Canada. The Company conducts its primary business operations through Heritage-Crystal Clean, LLC, its wholly owned subsidiary, and all intercompany balances have been eliminated in consolidation.

The Company has two reportable segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists of the Company's parts cleaning, containerized waste management, wastewater vacuum, antifreeze recycling activities, and field services. The Oil Business segment consists of the Company's used oil collection, recycled fuel oil sales, used oil re-refining activities, and used oil filter removal and disposal services. No customer represented greater than 10% of consolidated revenues for any of the periods presented. There were no intersegment revenues. Both segments operate in the United States and, to an immaterial degree, in Ontario, Canada. As such, the Company is not disclosing operating results by geographic segment.

The Company’s fiscal year ends on the Saturday closest to December 31. The most recent fiscal year ended on January 1, 2022. Each of the Company's first three fiscal quarters consists of twelve weeks while the last fiscal quarter consists of sixteen or seventeen weeks.  

In the Company's Environmental Services segment, product revenues include sales of solvent, machines, absorbent, accessories, and antifreeze; service revenues include servicing of parts cleaning machines, containerized waste removal services, wastewater vacuum services, field services, and other services; rental income includes embedded lease income from certain of our parts cleaning contracts. In the Company's Oil Business segment, product revenues primarily consist of sales of re-refined base oil, re-refinery co-products and recycled fuel oil; service revenues include revenues from used oil collection activities, collecting and disposing of wastewater and removal and disposal of used oil filters. Due to the Company's integrated business model, it is impracticable to separately present costs of tangible products and costs of services.

COVID-19 Pandemic

We are closely monitoring the spread and impact of the COVID-19 pandemic and are continually assessing its potential effects on our business and our financial performance as well as the businesses of our customers and vendors. The Company cannot predict the duration or severity of the COVID-19 pandemic, and we cannot reasonably estimate the financial impact the COVID-19 outbreak will have on our results and significant estimates going forward.

The ultimate impact of the COVID-19 pandemic on our business, results of operations, financial condition and cash flows is highly uncertain and cannot be accurately predicted and is dependent on future developments, including the duration of the pandemic and the related length of its impact on the global economy, and any new information that may emerge concerning the COVID-19 outbreak and the actions to contain it or treat its impact. In fiscal 2021, the continued impact on our business as a result of COVID-19 pandemic resulted in additional lost work hours which negatively impacted our ability to service our customers on a timely basis, the effect of which is included in the fiscal 2021 financial operations in this filing. Although no material impact on our business occurred during the second quarter of 2022, the continued impact on our business as a result of the COVID-19 pandemic could result in a material adverse effect on our business, results of operations, financial condition, prospects and the trading prices of our securities in the near-term and throughout 2022.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
	Jun. 18, 2022
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    The Company's significant accounting policies are described in Note 2, "Summary of Significant Accounting Policies," in the Company's Annual Report on Form 10-K for the fiscal year ended January 1, 2022. There have been no material changes in these policies or their application during the second quarter of fiscal 2022.

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BUSINESS COMBINATIONS

6 Months Ended

Jun. 18, 2022

Business Combination and Asset Acquisition [Abstract]

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS

On September 27, 2021, the Company completed the acquisition of Source Environmental, Inc., ("Source Environmental"), which increased the Company's penetration in the hazardous and non-hazardous waste business in several markets in the western U.S. This transaction also provided us the opportunity to internalize the performance of certain field service activities in the western U.S. Total consideration for the acquisition was approximately $20.4 million. To date, there have been no adjustments to the purchase price. Factors leading to goodwill being recognized are the Company’s expectation of synergies from combining operations of Source Environmental, and the Company as well as the value of intangible assets that are not separately recognized, such as the assembled workforce. Transaction costs incurred in conjunction with the acquisition of Source Environmental were immaterial. The results of Source Environmental are consolidated into the Company’s Environmental Services segment.

On September 13, 2021, the Company completed the acquisition of Raider Environmental Services of Florida, Inc., ("Raider Environmental"), which expanded our network of wastewater processing, oil collection and non-hazardous waste consolidation and solidification to better serve our customers in Florida and throughout the Southern United States. Total consideration for the acquisition was approximately $13.7 million. To date, there have been no adjustments to the purchase price. This acquisition provided the Company with another wastewater treatment facility as well as assets to help further our initiative to increase our non-hazardous containerized waste processing capabilities. This also provided us exposure to industry verticals in which we didn't previously participate. Factors leading to goodwill being recognized are the Company’s expectation of synergies from combining operations of Raider Environmental, and the Company as well as the value of intangible assets that are not separately recognized, such as the assembled workforce. Transaction costs incurred in conjunction with the acquisition of Raider Environmental were immaterial. The results of Raider Environmental are consolidated primarily into the Company’s Environmental Services segment and an immaterial amount in the Oil Business segment from the date of acquisition.

On August 24, 2021, Heritage-Crystal Clean completed the acquisition of certain assets of Bakersfield Transfer, Inc., and Cole’s Services, Inc., together known as ("Cole's Environmental"), which processed, stored, and disposed of hazardous waste within the state of California. The purchase price was $17.3 million subject to certain adjustments, including a contingent consideration provision. Goodwill recognized from the acquisition of Cole's Environmental, represents the excess of the estimated purchase consideration transferred over the estimated fair value of the assets acquired and liabilities assumed. To date, there have been no adjustments to the purchase price. Factors leading to goodwill being recognized are the Company’s expectation of synergies from combining operations of Cole's Environmental, and the Company as well as the value of intangible assets that are not separately recognized, such as the assembled workforce. The results of Cole's Environmental are consolidated primarily into the Company’s Environmental Services segment and an immaterial amount in the Oil Business segment from the date of acquisition.

The following table summarizes the estimated fair values of the assets acquired, net of cash acquired, related to each acquisition as of June 18, 2022:

	As of June 18, 2022
(thousands)	Source Environmental, Inc.		Raider Environmental Services of Florida, Inc.		Cole's Environmental
Accounts receivable	$	1,064	$	488	$	—
Inventory	—		—		73
Other current assets	6		162		—
Property, plant, & equipment	174		4,404		2,455
Intangible assets	13,692		6,056		9,620
Goodwill	6,174		2,835		5,144
Accounts payable and accruals	(677)		(218)		—
Total purchase price, net of cash acquired	$	20,433	$	13,727	$	17,292
Less: contingent consideration	—		—		5,819
Less: to be placed in escrow	—		—		100
Net cash paid	$	20,433	$	13,727	$	11,373

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REVENUE

6 Months Ended

Jun. 18, 2022

Revenue from Contract with Customer [Abstract]

REVENUE

REVENUE

We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when our performance obligations under the terms of a contract with our customers are satisfied. Recognition occurs when the Company transfers control by completing the specified services at the point in time the customer benefits from the services performed or once our products are delivered. The majority of revenue is recognized at a point in time, except for rental income which is recognized on an over time basis. The Company measures progress toward complete satisfaction of a performance obligation satisfied over time using a cost-based input method. This method of measuring progress provides a faithful depiction of the transfer of goods or services because the costs incurred are expected to be substantially proportionate to the Company’s satisfaction of the performance obligation. Revenue is measured as the amount of consideration we expect to receive in exchange for completing our performance obligations. Sales tax and other taxes we collect with revenue-producing activities are excluded from revenue. In the case of contracts with multiple performance obligations, the Company allocates the transaction price to each performance obligation based on the relative stand-alone selling prices of the various goods and/or services encompassed by the contract. We do not have any material significant payment terms as payment is generally due within 30 days after the performance obligation has been satisfactorily completed. The Company has elected the practical expedient to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less. In applying the guidance in Topic 606, there were no judgments or estimates made that the Company deems significant.

Contract Balances — Contract assets primarily relate to the Company’s rights to consideration for work completed in relation to its services performed but not billed at the reporting date. Contract liabilities primarily consist of advance payments of performance obligations yet to be fully satisfied in the period reported. Our contract liabilities and contract assets are reported in a net position at the end of each reporting period.

We disaggregate our revenue from contracts with customers by major lines of business for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors.

The following table disaggregates our revenue by major lines:

	Second Quarter Ended,
	June 18, 2022						June 19, 2021
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning, Containerized Waste, & related products/services	$	50,320	$	—	$	50,320	$	40,741	$	—	$	40,741
Wastewater Vacuum Services	21,150		—		21,150		14,848		—		14,848
Field Services	6,539		—		6,539		4,749		—		4,749
Antifreeze Business	7,118		—		7,118		6,285		—		6,285
Environmental Services - Other	486		—		486		407		—		407
Re-Refinery Product Sales	—		54,198		54,198		—		38,830		38,830
Oil Collection Services & RFO	—		9,253		9,253		—		4,552		4,552
Oil Filter Business	—		1,309		1,309		—		1,172		1,172
Revenues from Contracts with Customers	85,613		64,760		150,373		67,030		44,554		111,584
Rental income	6,265		9		6,274		5,686		9		5,695
Total Revenues	$	91,878	$	64,769	$	156,647	$	72,716	$	44,563	$	117,279

	First Half Ended,
	June 18, 2022						June 19, 2021
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts cleaning, containerized waste, & related products/services	$	97,176	$	—	$	97,176	$	79,574	$	—	$	79,574
Wastewater Vacuum Services	38,541		—		38,541		28,541		—		28,541
Field Services	12,829		—		12,829		8,845		—		8,845
Antifreeze Business	14,774		—		14,774		13,273		—		13,273
Environmental Services - Other	981		—		981		847		—		847
Re-refinery Product Sales	—		103,337		103,337		—		68,883		68,883
Oil Collection Services & RFO	—		13,566		13,566		—		9,169		9,169
Oil Filter Business	—		2,558		2,558		—		2,417		2,417
Revenues from Contracts with Customers	164,301		119,461		283,762		131,080		80,469		211,549
Rental income	12,228		23		12,251		11,093		18		11,111
Total Revenues	$	176,529	$	119,484	$	296,013	$	142,173	$	80,487	$	222,660

The following table provides information about contract assets and contract liabilities from contracts with customers:

(thousands)	June 18, 2022		January 1, 2022
Contract assets	$	73	$	268
Contract liabilities	2,719		2,362
Contract liabilities - net	$	2,646	$	2,094

During the fiscal quarter ended June 18, 2022, the Company recognized no revenue that was included in the contract liabilities balance as of January 1, 2022. During the first half ended June 18, 2022, the Company recognized $2.4 million of revenue that was included in the contract liabilities balance as of January 1, 2022. The Company has no assets recognized from costs to obtain or fulfill a contract with a customer. We do not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less.

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ACCOUNTS RECEIVABLE

6 Months Ended

Jun. 18, 2022

Accounts Receivable, after Allowance for Credit Loss [Abstract]

ACCOUNTS RECEIVABLE

ACCOUNTS RECEIVABLE

Accounts Receivable — Net, includes amounts billed to and currently due from customers. The amounts due are stated at their net estimated realizable value. The allowance for uncollectible accounts is our best estimate of the amount of probable lifetime-expected credit losses in existing accounts receivable and is determined based on our historical collections experience, age of the receivable, knowledge of the customer and the condition of the general economy and industry as a whole. The Company does not have any off-balance-sheet credit exposure related to its customers.

Accounts receivable for the second quarter ended June 18, 2022, and the fiscal year ended January 1, 2022 consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Trade	$	73,487	$	59,132
Less: allowance for uncollectible accounts	3,011		2,928
Trade - net	70,476		56,204
Related parties	9,354		5,410
Other	436		899
Total accounts receivable - net	$	80,266	$	62,513

The following table provides the changes in the Company’s allowance for uncollectible accounts for the first half ended June 18, 2022, and the fiscal year ended January 1, 2022:

(thousands)	June 18, 2022		January 1, 2022
Balance at beginning of period	$	2,928	$	2,502
Provision for uncollectible accounts	453		1,930
Accounts written off, net of recoveries	(370)		(1,504)
Balance at end of period	$	3,011	$	2,928

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INVENTORY

6 Months Ended

Jun. 18, 2022

Inventory Disclosure [Abstract]

INVENTORY

INVENTORY

The carrying value of inventory consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Solvents and solutions	$	10,429	$	7,704
Used oil and processed oil	12,734		9,361
Machines	5,175		4,995
Drums and supplies	6,028		5,731
Other	2,297		2,246
Total inventory	36,663		30,037
Less: machine refurbishing reserve	442		501
Total inventory - net	$	36,221	$	29,536

Inventory consists primarily of used oil, processed oil, solvents and solutions, new and refurbished parts cleaning machines, drums and supplies, and other items. Inventories are valued at the lower of first-in, first-out (FIFO) cost or net realizable value, net of any reserves for excess, obsolete, or unsalable inventory. The Company monitors its inventory levels at each of its locations and evaluates inventories for excess or slow-moving items. If circumstances indicate the cost of inventories exceed their recoverable value, inventories are reduced to net realizable value. The Company had no inventory write downs during the second quarter of fiscal 2022 compared to $0.2 million of inventory write downs during the second quarter of fiscal 2021.

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GOODWILL AND OTHER INTANGIBLE ASSETS

6 Months Ended

Jun. 18, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill is measured as a residual amount as of the acquisition date, which in most cases results in measuring goodwill as an excess of the purchase consideration transferred plus the fair value of any noncontrolling interest in the acquiree over the fair value of the net assets acquired, including any contingent consideration. The Company tests goodwill for impairment annually in the fourth quarter and in interim periods if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Company's determination of fair value requires certain assumptions and estimates, such as margin expectations, market conditions, growth expectations, expected changes in working capital, etc., regarding expected future profitability and expected future cash flows. The Company reports and tests goodwill for impairment only in its Environmental Services reporting unit.

The following table shows changes to our goodwill balances by segment from January 1, 2022 to June 18, 2022:

(thousands)	Environmental Services		Total
Goodwill at January 1, 2022
Gross carrying amount	$	49,695	$	49,695
Accumulated impairment loss	—		—
Net book value at January 1, 2022	$	49,695	$	49,695
Goodwill at June 18, 2022
Gross carrying amount	49,695		$	49,695
Accumulated impairment loss	—		—
Net book value at June 18, 2022	$	49,695	$	49,695

The following is a summary of software and other intangible assets:

	June 18, 2022						January 1, 2022
(thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer & supplier relationships	$	47,167	$	22,918	$	24,249	$	47,167	$	20,725	$	26,442
Permits	13,590		1,249		12,341		13,590		879		12,711
Software	13,202		6,820		6,382		11,721		6,399		5,322
Non-compete agreements	4,427		3,511		916		4,048		3,340		708
Patents, formulae, and licenses	1,769		936		833		1,769		906		863
Other*	606		717		(111)		996		1,093		(97)
Total software and intangible assets	$	80,761	$	36,151	$	44,610	$	79,291	$	33,342	$	45,949

*Other intangibles include an above market lease acquired in September 2021 that had a fair value of ($0.7) million upon acquisition and is being accreted over the remaining useful life of the lease.

Amortization expense was $1.4 million for the second quarter ended June 18, 2022, and $1.0 million for the second quarter ended June 19, 2021. Amortization expense was $2.8 million for the first half ended June 18, 2022, and $2.3 million for the first half ended June 19, 2021.

The weighted average useful lives of software and other intangibles are as follows:

	Weighted Average Useful Life (years)
Permits	16
Patents, formulae, & licenses	15
Customer and supplier relationships	12
Software	9
Non-compete agreements	5
Other	7

    The estimated amortization expense for the remainder of fiscal 2022 and each of the five succeeding fiscal years is as follows:

(millions)
Fiscal Year	Amortization Expense
2022	$3.4
2023	5.7
2024	4.1
2025	3.1
2026	2.5
2027	2.5

The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, the finalization of the fair value of intangible assets that have been acquired from business combinations, disposal of intangible assets, accelerated amortization of intangible assets, and other events.

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ACCOUNTS PAYABLE

6 Months Ended

Jun. 18, 2022

Payables and Accruals [Abstract]

ACCOUNTS PAYABLE

ACCOUNTS PAYABLE

Accounts payable consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Accounts payable	$	44,105	$	35,613
Accounts payable - related parties	938		566
Total accounts payable	$	45,043	$	36,179

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DEBT AND FINANCING ARRANGEMENTS

6 Months Ended

Jun. 18, 2022

Debt Disclosure [Abstract]

DEBT AND FINANCING ARRANGEMENTS

DEBT AND FINANCING ARRANGEMENTS

Bank Credit Facility

On March 18, 2021, Heritage-Crystal Clean, LLC, (the “Company”), entered into an Amended and Restated Credit Agreement (the "Agreement"), by and among the Company, its parent, Heritage-Crystal Clean, Inc., and the Company’s subsidiaries identified therein and Bank of America, N.A., as administrative agent, JPMorgan Chase Bank, N.A., and Wells Fargo Bank, National Association. The Agreement replaces the Company's previous Credit Agreement dated as of February 21, 2017. During the first quarter of 2021 the Company paid down its previous term loan, in full, of $30.0 million. The new Agreement provides for borrowings of up to $100.0 million, in the form of a revolving facility, of which $15 million can be used in the form of a Swing Line loan. The Agreement also provides for up to an additional $50.0 million of borrowings using an accordion feature upon approval of the lenders.

Loans made under the Agreement, as amended, may be Base Rate Loans or LIBOR Rate Loans, at the election of the Borrower subject to certain exceptions. Base Rate Loans have an interest rate equal to (i) the higher of (a) the federal funds rate plus 0.5%, (b) the London Interbank Offering Rate (“LIBOR”) plus 1%, or (c) Bank of America's prime rate, plus (ii) a variable margin of between 0.50% and 1.25% depending on the Company's total leverage ratio, calculated on a consolidated basis. LIBOR rate loans have an interest rate equal to (i) the LIBOR rate plus (ii) a variable margin of between 1.50% and 2.25% depending on the Company's total leverage ratio. Amounts borrowed under the Agreement are secured by a security interest in substantially all of the Company's tangible and intangible assets. The Company incurred $0.8 million of debt issuance costs related to the amended credit agreement.

The Credit Agreement contains customary terms and provisions (including representations, covenants, and conditions) for transactions of this type. Certain covenants, among other things, restrict the Company's and its subsidiaries' ability to incur indebtedness, grant liens, make investments and sell assets. The Credit Agreement also contains customary events of default, covenants and representations and warranties. Financial covenants include:

•An interest coverage ratio (based on interest expense and EBITDA) of at least 3.5 to 1.0;

•A total leverage ratio no greater than 3.0 to 1.0, provided that in the event of a permitted acquisition having an aggregate consideration equal to $10.0 million or more, at the Borrower’s election, the foregoing 3.00 to 1.00 shall be deemed to be 3.50 to 1.00 for the fiscal quarter in which such permitted acquisition occurs and the three immediately following fiscal quarters and will thereafter revert to 3.00 to 1.00.

The Credit Agreement places certain limitations on acquisitions and the payment of dividends.

On July 27, 2017, the Financial Conduct Authority, which regulates LIBOR, announced that it intended to phase out the London Interbank Offered Rate by the end of 2021. Subsequently the phase out deadline was extended to June 30, 2023. We expect that widespread use of LIBOR will transition to alternative interest rates in the near future. Since loans made under our Credit Agreement may be LIBOR based loans, the phasing out of LIBOR may adversely affect interest rates that could result in higher borrowing costs and higher interest expense. As the Company does not have any outstanding borrowings under the financial instruments impacted by LIBOR, the effect on the financial statements is not material.

The Company had no outstanding borrowings as of June 18, 2022 and January 1, 2022.

For the second quarter ended June 18, 2022, the Company recorded interest expense of $0.3 million with respect to our credit line and related amortization of debt issuance costs. For the second quarter ended June 19, 2021, the Company recorded interest expense of $0.3 million with respect to our term loan and credit line, and related amortization of debt issuance costs.As of June 18, 2022 and January 1, 2022, the Company was in compliance with all covenants under its Credit Agreement. As of June 18, 2022 and January 1, 2022, the Company, had $6.7 million and $5.6 million, of standby letters of credit issued, respectively, and $93.3 million and $94.4 million was available for borrowing under the bank credit facility, respectively.

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SEGMENT INFORMATION

6 Months Ended

Jun. 18, 2022

Segment Reporting [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATION

The Company has two reportable segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists primarily of the Company's parts cleaning, containerized waste management, wastewater vacuum services, antifreeze recycling activities, and field services. The Oil Business segment consists primarily of the Company's used oil collection, used oil re-refining activities, and the dehydration of used oil to be sold as recycled fuel oil.

No single customer in either segment accounted for more than 10.0% of consolidated revenues in any of the periods presented. There were no intersegment revenues. Both the Environmental Services and Oil Business segments operate in the United States and, to an immaterial degree, in Ontario, Canada. As such, the Company is not disclosing operating results by geographic segment.

Segment results for the second quarter ended June 18, 2022 and June 19, 2021 were as follows:

Second Quarter Ended,
June 18, 2022
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	72,979	$	2,604	$	—	$	75,583
	Product revenues	12,634		62,156		—		74,790
	Rental income	6,265		9		—		6,274
Total revenues		$	91,878	$	64,769	$	—	$	156,647
Operating expenses
	Operating costs	68,914		35,841		—		104,755
	Operating depreciation and amortization	3,192		2,125		—		5,317
Profit before corporate selling, general, and administrative expenses		$	19,772	$	26,803	$	—	$	46,575
Selling, general, and administrative expenses						15,024		15,024
Depreciation and amortization from SG&A						1,460		1,460
Total selling, general, and administrative expenses						$	16,484	$	16,484
Other expense (income) - net						1,001		1,001
Operating income								29,090
Interest expense – net						250		250
Income before income taxes								$	28,840

Second Quarter Ended,
June 19, 2021
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	56,403	$	3,630	$	—	$	60,033
	Product revenues	10,627		40,924		—		51,551
	Rental income	5,686		9		—		5,695
Total revenues		$	72,716	$	44,563	$	—	$	117,279
Operating expenses
	Operating costs	51,119		27,210		—		78,329
	Operating depreciation and amortization	2,430		2,109		—		4,539
Profit before corporate selling, general, and administrative expenses		$	19,167	$	15,244	$	—	$	34,411
Selling, general, and administrative expenses						13,039		13,039
Depreciation and amortization from SG&A						1,080		1,080
Total selling, general, and administrative expenses						$	14,119	$	14,119
Other (income) - net						(330)		(330)
Operating income								20,622
Interest expense – net						177		177
Income before income taxes								$	20,445

Segment results for the first half ended June 18, 2022, and June 19, 2021 were as follows:

First Half Ended,
June 18, 2022
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	139,278	$	5,212	$	—	$	144,490
	Product revenues	25,023		114,249		—		139,272
	Rental income	12,228		23		—		12,251
Total revenues		$	176,529	$	119,484	$	—	$	296,013
Operating expenses
	Operating costs	136,532		70,006		—		206,538
	Operating depreciation and amortization	6,081		4,209		—		10,290
Profit before corporate selling, general, and administrative expenses		$	33,916	$	45,269	$	—	$	79,185
Selling, general, and administrative expenses						28,759		28,759
Depreciation and amortization from SG&A						2,995		2,995
Total selling, general, and administrative expenses						$	31,754	$	31,754
Other expense (income) - net						791		791
Operating income								46,640
Interest expense – net						473		473
Income before income taxes								$	46,167

First Half Ended,
June 19, 2021
(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
Service revenues	$	109,706	$	8,026			$	117,732
Product revenues	21,374		72,443		—		93,817
Rental income	11,093		18				11,111
Total revenues	$	142,173	$	80,487	$	—	$	222,660
Operating expenses
Operating costs	102,999		52,100		—		155,099
Operating depreciation and amortization	4,008		3,058				7,066
Profit (loss) before corporate selling, general, and administrative expenses	$	35,166	$	25,329	$	—	$	60,495
Selling, general, and administrative expenses					25,228		25,228
Depreciation and amortization from SG&A					2,335		2,335
Total selling, general, and administrative expenses					$	27,563	$	27,563
Other (income) - net					(439)		(439)
Operating income							33,371
Interest expense – net					501		501
Income before income taxes							$	32,870

Total assets by segment as of June 18, 2022 and January 1, 2022 were as follows:

(thousands)		June 18, 2022		January 1, 2022
Total Assets:
	Environmental Services	$	294,619	$	281,333
	Oil Business	187,999		171,188
	Unallocated Corporate Assets	96,919		74,343
Total		$	579,537	$	526,864

Segment assets for the Environmental Services and Oil Business segments consist of property, plant, and equipment, right-of-use assets, intangible assets, accounts receivable, goodwill, and inventories. Assets for the corporate unallocated amounts consist of property, plant, and equipment used at the corporate headquarters as well as cash and net deferred tax assets.

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COMMITMENTS AND CONTINGENCIES

6 Months Ended

Jun. 18, 2022

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

LEASES

Lessee

The Company leases buildings and property, railcars, machinery and equipment, and various types of vehicles and trailers for use in our operations. Each arrangement is evaluated individually to determine if the arrangement is or contains a lease at inception. The Company has lease agreements with lease and non-lease components and we have elected to not separate lease and non-lease components for all classes of underlying assets. In addition, our lease agreements do not contain any material residual guarantees or restrictive covenants.

Leases may include variable lease payments for common area maintenance, real estate taxes, and truck lease mileage. Variable lease payments are not included in the initial measurement of the right-of-use assets or lease liabilities, and are recorded as lease expense in the period incurred. Options to extend or terminate a lease are included in the lease term when it is reasonably certain that we will exercise that option. We have elected not to record leases with an initial term of 12 months or less on the balance sheet and instead recognize those lease payments on a straight-line basis over the lease term. Leases with initial terms in excess of 12 months are recorded as either operating or financing leases in our Consolidated Balance Sheet.

Right-of-use assets represent the Company's right to use an underlying asset during the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Our leased right-of-use assets are measured at the initial measurement of the lease liability, adjusted for any lease payments made prior to the lease commencement date, less any lease incentives received and other initial direct costs incurred. Our lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use an incremental borrowing rate based on the information available at commencement date, including lease term, in determining the present value of future payments.

Our leases have remaining terms ranging from less than one month to approximately 12 years and may include options to extend or terminate the lease when it is reasonably certain that the option will be exercised. Lease expense is recognized on a straight-line basis over the lease term. Our finance leases include a fleet of mobile equipment.

Lessor

The Company is a lessor of portions of buildings and property, railcars, and equipment such as embedded leases of parts cleaning machines. Each of the Company’s leases is classified as an operating lease, and the vast majority are short-term leases. Variable lease payments include real and personal property taxes, which are based on the lessee’s pro rata portion of such amounts, and excess mileage charges which are computed as the actual miles traveled in a calendar year minus the maximum average mileage allowance as specified per the contract. Options to extend the lease beyond the original terms range from day-to-day renewals to increments of five-year extensions. Options to terminate the lease range from immediate termination upon return of the asset to various written notification periods following a minimum lease term. Options for a lessee to purchase the underlying asset are not contractually specified but may be negotiated on a case-by-case basis. Significant judgments made in determining whether a contract contains a lease include assessments as to whether or not the contract conveys the right to direct the use of an identified asset. Significant judgments made in allocating consideration between lease and non-lease components include techniques applied in estimating the relative stand-alone selling prices of the lease and non-lease components of the contract in cases where a stand-alone selling price is not directly observable. No leased assets are covered by residual value guarantees. The Company manages the risk associated with the residual value of leased assets through such means as performing periodic maintenance and upkeep activities and the inclusion of contractual terms that hold the lessee responsible for damage incurred to leased assets. The Company has made an accounting policy election to exclude from the consideration in the contract, and from variable payments not included in the consideration in the contract, all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific lease revenue-producing transaction and collected by the lessor from a lessee.

The Company recognizes rental income on a straight-line basis for that portion of the consideration allocated to the embedded lease component of certain of our parts cleaning contracts. We also recognize rental income on certain subleases of railcars and portions of buildings and property.

Rental income was as follows:

	Second Quarter Ended,
	June 18, 2022						June 19, 2021
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	6,233	$	—	$	6,233	$	5,636	$	—	$	5,636
Property	32		9		41		50		9		59
Total rental income	$	6,265	$	9	$	6,274	$	5,686	$	9	$	5,695

	First Half Ended,
	June 18, 2022						June 19, 2021
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	12,172	$	—	$	12,172	$	11,043	$	—	$	11,043
Property	56		23		79		50		18		68
Total rental income	$	12,228	$	23	$	12,251	$	11,093	$	18	$	11,111

Purchase Obligations

The Company may enter into purchase obligations with certain vendors. They represent expected payments to third party service providers and other commitments entered into during the normal course of our business. These purchase obligations are generally cancellable with or without notice, without penalty, although certain vendor agreements provide for cancellation fees or penalties depending on the terms of the contract.

The Company has purchase obligations in the form of open purchase orders of $16.8 million as of June 18, 2022, and $16.5 million as of January 1, 2022, primarily for used oil, solvent, machine purchases, disposal and transportation expenses, and capital expenditures.

Litigation and Claims

The Company may be subject to investigations, claims or lawsuits as a result of operating its business, including matters governed by environmental laws and regulations. The Company may also be subject to tax audits in a variety of jurisdictions. When claims are asserted, the Company evaluates the likelihood that a loss will occur and records a liability for those instances when the likelihood is deemed probable and the exposure is reasonably estimable. The Company carries insurance at levels it believes are adequate to cover loss contingencies based on historical claims activity. When the potential loss exposure is limited to the insurance deductible and the likelihood of loss is determined to be probable, the Company accrues for the amount of the required deductible, unless a lower amount of exposure is estimated. As of June 18, 2022 and January 1, 2022, the Company had accrued $3.9 million and $3.2 million related to loss contingencies and other contingent liabilities, respectively.

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INCOME TAXES

6 Months Ended

Jun. 18, 2022

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

Tax expense for the second fiscal quarter of 2022 was $7.7 million. The Company's effective tax rate for the second quarter of fiscal 2022 was 27.0% compared to 26.1% in the second quarter of fiscal 2021. Tax expense for the first fiscal half of 2022 was $12.2 million. The Company’s effective tax rate for the first half of fiscal 2022 was 26.4% compared to 26.0% in the first half of 2021. The rate increases are principally attributable to the increased impact of certain adjustments to federal taxable income as compared to the first half of fiscal 2021.

The Company establishes reserves when it is more likely than not that the Company will not realize the full tax benefit of a position. The Company had a reserve of $2.2 million for uncertain tax positions as of June 18, 2022. The gross unrecognized tax benefits would, if recognized, decrease the Company's effective tax rate.

As of June 18, 2022, the Company believes it is more likely than not that a benefit from foreign net operating loss carryforwards will not be realized. The Company provided a valuation allowance against those foreign net operating loss carryforwards of $0.6 million.

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SHARE-BASED COMPENSATION

6 Months Ended

Jun. 18, 2022

Share-Based Payment Arrangement [Abstract]

SHARE-BASED COMPENSATION

SHARE-BASED COMPENSATION

 Restricted Stock Compensation/Awards

Annually, the Company grants restricted shares to its Board of Directors. The shares become fully vested one year from their grant date. The fair value of each restricted stock grant is based on the closing price of the Company's common stock on the date of grant. The Company amortizes the expense over the service period, which is the fiscal year in which the award is granted. In addition, the Company may grant restricted shares to certain members of management based on their services and contingent upon continued service with the Company. The restricted shares vest over a period of approximately three years from the grant date. The fair value of each restricted stock grant is based on the closing price of the Company's common stock on the date of grant.

The following table shows a summary of restricted share grants and expense resulting from the awards:

    

			Compensation Expense
(thousands, except share amounts)			First Half Ended,		Unrecognized Expense as of,
Recipient of Grant	Grant Date	Restricted Shares	June 18, 2022	June 19, 2021	June 18, 2022	June 19, 2021
Special Incentive Grant	April, 2018	350,000	380	810	—	1,111
Members of Management	May, 2019	23,560	—	110	—	145
Members of Management	February, 2020	41,138	40	66	47	280
Chief Executive Officer	February, 2021	500,000	1,067	912	2,814	5,310
Members of Management	February, 2021	35,898	103	71	345	586
Board of Directors	April, 2021	11,487	—	150	—	182
Members of Management	February, 2022	75,355	245	—	1,303	—
Board of Directors	April, 2022	17,082	234	—	246	—

On January 8, 2021, the Company and Mr. Brian Recatto entered into an amended Executive Employment Agreement (the “Amended Agreement”) which was effective on February 1, 2021. Pursuant to the Amended Agreement, the Company replaced in its entirety section 4.3 of the First Amendment to the Executive Employment Agreement relating to equity compensation that was effective February 1, 2017. As of February 1, 2021, Mr. Recatto received a one-time award of 500,000 shares of restricted stock, subject to the achievement of performance criteria established by the Compensation Committee of the Board of Directors pursuant to the Company's 2019 Incentive Plan.

The award date for such Performance-Based Restricted Stock was on February 1, 2021. Such award was granted pursuant to and governed by the terms of the 2019 Incentive Plan and an award agreement in a form provided by the Company. The Performance-Based Restricted Stock one-time award of 500,000 shares received on February 1, 2021, shall vest on January 31, 2025 if Mr. Recatto is employed by the Company on that date, in an amount determined by applying the applicable percentages from the chart below, with the common stock price increases to be determined based on the increase in the price of the Company’s common stock (if any) from the closing price of the common stock as reported by Nasdaq on the amended agreement commencement date ($21.77) and the common stock price on the potential vesting date (determined by using the average closing price of a share of the Company's common stock for the 90-day period ending on the vesting date). If the stock price does not increase by $5.00, then no shares shall vest.

During the second quarter of fiscal 2022, the Company recorded approximately $1.1 million of compensation expense related to this award. In the future, the Company expects to recognize compensation expense of approximately $2.8 million over the remaining requisite service period, which ends January 31, 2025. The fair value of this restricted stock award as of the grant date was estimated using a Monte Carlo simulation model. Key assumptions used in the Monte Carlo simulation to estimate the grant date fair value of this award are a risk-free rate of 0.29%, expected dividend yield of zero, and an expected volatility assumption of 53.07%.

Vesting Table
Increase in Stock Price From the Amended Agreement Commencement Date to the Vesting Date	Total Percentage of Restricted Stock Shares to Be Vested
Less than $5 per share increase	—%
$5 per share increase	25% (vest in 125,000 shares)
$10 per share increase	50% (vest in 250,000 shares)
$15 per share increase	75% (vest in 375,000 shares)
$20 or more per share increase	100% (vest in 500,000 shares)

Provision for possible accelerated vesting of award

If the average closing price of the Company's common stock increases by the marginal levels set forth in the above vesting table for any consecutive 180 day period between February 1, 2021 and January 31, 2025, Mr. Recatto shall become vested in 50% of the corresponding total percentage of restricted shares earned on the last day of the 180 day period.

In addition, on each of December 31, 2021, December 31, 2022, and December 31, 2023, to the extent Mr. Recatto remains employed by the Company under the Amended Agreement on such date, Mr. Recatto shall receive a grant of restricted stock as of such date valued at Five Hundred Thousand Dollars ($500,000), with the number of shares of restricted stock constituting such grant determined by applying the average closing price for a share of the Company’s common stock for the 90-day period ending on such date. Such awards of Time-Based Restricted Stock shall be granted pursuant to and governed by the terms of the 2019 Incentive Plan and an award agreement in a form provided by the Company. The Time-Based Restricted Stock shall vest only if Mr. Recatto remains employed by the Company under the Amended Agreement through December 31, 2023; provided, that, upon a Change of Control of the Company (as such term is defined in the Amended Agreement), all shares of the Time-Based Restricted Stock awarded up through the date of closing of the Change in Control shall become vested, and no further award of Time-Based Restricted Stock shall be awarded. During the second quarter of fiscal 2022, the Company recorded approximately $0.3 million of compensation expense related to this award.

The following table summarizes the restricted stock activity for the second quarter ended June 18, 2022:

Restricted Stock (Nonvested Shares)	Number of Shares	Weighted Average Grant-Date Fair Value Per Share
Nonvested shares outstanding at January 1, 2022	723,983	$	21.83
Granted	92,437	27.64
Vested	(107,772)	23.05
Forfeited	(128,297)	22.35
Nonvested shares outstanding at June 18, 2022	580,351	$	23.27

Employee Stock Purchase Plan

As of June 18, 2022, the Company had reserved 51,718 shares of common stock available for purchase under the Employee Stock Purchase Plan. In the second quarter of fiscal 2022, employees purchased 4,794 shares of the Company’s common stock with a weighted average fair market value of $29.77 per share.

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EARNINGS PER SHARE

6 Months Ended

Jun. 18, 2022

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHAREThe following table reconciles the number of shares outstanding for the second quarter of fiscal 2022 and 2021, respectively, to the number of weighted average basic shares outstanding and the number of weighted average diluted shares outstanding for the purposes of calculating basic and diluted earnings per share:

	Second Quarter Ended,				First Half Ended,
(thousands, except per share amounts)	June 18, 2022		June 19, 2021		June 18, 2022		June 19, 2021
Net income	$	21,107	$	15,111	$	33,985	$	24,317
Weighted average basic shares outstanding	23,489		23,404		23,482		23,389
Dilutive shares for share–based compensation plans	155		161		158		148
Weighted average diluted shares outstanding	23,644		23,565		23,640		23,537
Net income per share: basic	$	0.90	$	0.65	$	1.45	$	1.04
Net income per share: diluted	$	0.89	$	0.64	$	1.44	$	1.03

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FAIR VALUE MEASUREMENTS

6 Months Ended

Jun. 18, 2022

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

Recurring Fair Value Measurements

The following tables summarize assets measured at fair value on a recurring basis (in millions) as of June 18, 2022:

	Quoted prices in active markets (Level 1)	Significant other observable inputs (Level 2)	Significant unobservable inputs (Level 3)	Fair Value Measurements
Equity Securities (1)	$—	$—	$3.0	$3.0

(1) Represents a $3.0 million investment the Company invested in its privately held battery recycling partner, HBR Retriev Holdco, LLC ("Retriev"). Retriev is a Limited Liability Company that is controlled by the Heritage Group, an affiliate of the Company.

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OTHER (INCOME) EXPENSE - NET	6 Months Ended
	Jun. 18, 2022
Other Income and Expenses [Abstract]
OTHER (INCOME) EXPENSE - NET	OTHER (INCOME) EXPENSE - NETOther (income) expense - net was $1.0 million of expense for the second quarter of fiscal 2022, compared to a net $(0.3) million of income in the second quarter of 2021. Other (income) expense - net was $0.8 million of expense for the first half of fiscal 2022, compared to $(0.4) million of income for the first half of fiscal 2021. The 2022 other expense includes approximately $1.1 million of net loss on disposal of assets.

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SUBSEQUENT EVENTS

6 Months Ended

Jun. 18, 2022

Subsequent Events [Abstract]

SUBSEQUENT EVENTS

SUBSEQUENT EVENTSOn June 29, 2022, the Company entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”) with Channel PES Acquisition Co., LLC, a Delaware limited liability company (“Seller”), for the acquisition of all of the issued and outstanding shares of the capital stock (the “Shares”) of Patriot Environmental Services, Inc., a California corporation (“Patriot”). The Stock Purchase Agreement provides that, upon the terms and subject to the conditions thereof, Buyer will acquire all of the Shares, on a cash-free, debt-free basis, for an aggregate cash consideration of approximately $156 million, subject to certain adjustments set forth in the Stock Purchase Agreement. The transaction is not subject to any financing condition or contingency, and the Company expects to fund the purchase price with cash on hand and using its existing credit facility (and, in connection therewith, exercising the accordion feature of such credit facility to increase the borrowing availability of such credit facility).

Each party’s obligation to consummate the transactions contemplated by the Stock Purchase Agreement is subject to certain customary conditions, including (i) the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, (ii) the absence of any order issued by any governmental authority restraining, enjoining or otherwise making illegal the transactions contemplated by the Stock Purchase Agreement and (iii) the absence of any law which makes the consummation of such transactions illegal. Buyer’s obligation to consummate the transactions contemplated by the Stock Purchase Agreement is also conditioned on, among other things, the absence of a Material Adverse Effect (as defined in the Stock Purchase Agreement) having occurred since June 29, 2022.

Patriot is a leading provider of environmental services across the Western United States specializing in a wide variety of waste services, including emergency response, industrial services, and OSRO spill response. Patriot provides full-service environmental solutions to a wide variety of end markets, serving customers within manufacturing, agriculture, construction, healthcare, mining, oil & gas, transportation, and utilities markets. From custom on-site services to industrial waste disposal, as well as wastewater treatment, Patriot operates at eighteen locations in the western and southern United States.

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ORGANIZATION AND NATURE OF OPERATIONS (Policies)	6 Months Ended
	Jun. 18, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Fiscal Period	The Company’s fiscal year ends on the Saturday closest to December 31. The most recent fiscal year ended on January 1, 2022. Each of the Company's first three fiscal quarters consists of twelve weeks while the last fiscal quarter consists of sixteen or seventeen weeks.

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BUSINESS COMBINATIONS (Tables)

6 Months Ended

Jun. 18, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule Estimated Fair Values of Assets Acquired, Net of Cash Acquired

The following table summarizes the estimated fair values of the assets acquired, net of cash acquired, related to each acquisition as of June 18, 2022:

	As of June 18, 2022
(thousands)	Source Environmental, Inc.		Raider Environmental Services of Florida, Inc.		Cole's Environmental
Accounts receivable	$	1,064	$	488	$	—
Inventory	—		—		73
Other current assets	6		162		—
Property, plant, & equipment	174		4,404		2,455
Intangible assets	13,692		6,056		9,620
Goodwill	6,174		2,835		5,144
Accounts payable and accruals	(677)		(218)		—
Total purchase price, net of cash acquired	$	20,433	$	13,727	$	17,292
Less: contingent consideration	—		—		5,819
Less: to be placed in escrow	—		—		100
Net cash paid	$	20,433	$	13,727	$	11,373

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REVENUE (Tables)

6 Months Ended

Jun. 18, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue by Major Lines

The following table disaggregates our revenue by major lines:

	Second Quarter Ended,
	June 18, 2022						June 19, 2021
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning, Containerized Waste, & related products/services	$	50,320	$	—	$	50,320	$	40,741	$	—	$	40,741
Wastewater Vacuum Services	21,150		—		21,150		14,848		—		14,848
Field Services	6,539		—		6,539		4,749		—		4,749
Antifreeze Business	7,118		—		7,118		6,285		—		6,285
Environmental Services - Other	486		—		486		407		—		407
Re-Refinery Product Sales	—		54,198		54,198		—		38,830		38,830
Oil Collection Services & RFO	—		9,253		9,253		—		4,552		4,552
Oil Filter Business	—		1,309		1,309		—		1,172		1,172
Revenues from Contracts with Customers	85,613		64,760		150,373		67,030		44,554		111,584
Rental income	6,265		9		6,274		5,686		9		5,695
Total Revenues	$	91,878	$	64,769	$	156,647	$	72,716	$	44,563	$	117,279

	First Half Ended,
	June 18, 2022						June 19, 2021
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts cleaning, containerized waste, & related products/services	$	97,176	$	—	$	97,176	$	79,574	$	—	$	79,574
Wastewater Vacuum Services	38,541		—		38,541		28,541		—		28,541
Field Services	12,829		—		12,829		8,845		—		8,845
Antifreeze Business	14,774		—		14,774		13,273		—		13,273
Environmental Services - Other	981		—		981		847		—		847
Re-refinery Product Sales	—		103,337		103,337		—		68,883		68,883
Oil Collection Services & RFO	—		13,566		13,566		—		9,169		9,169
Oil Filter Business	—		2,558		2,558		—		2,417		2,417
Revenues from Contracts with Customers	164,301		119,461		283,762		131,080		80,469		211,549
Rental income	12,228		23		12,251		11,093		18		11,111
Total Revenues	$	176,529	$	119,484	$	296,013	$	142,173	$	80,487	$	222,660

Contract Assets and Contract Liabilities from Contracts with Customers

The following table provides information about contract assets and contract liabilities from contracts with customers:

(thousands)	June 18, 2022		January 1, 2022
Contract assets	$	73	$	268
Contract liabilities	2,719		2,362
Contract liabilities - net	$	2,646	$	2,094

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ACCOUNTS RECEIVABLE (Tables)

6 Months Ended

Jun. 18, 2022

Accounts Receivable, after Allowance for Credit Loss [Abstract]

Schedule of Accounts Receivable and Allowance for Uncollectible Accounts

Accounts receivable for the second quarter ended June 18, 2022, and the fiscal year ended January 1, 2022 consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Trade	$	73,487	$	59,132
Less: allowance for uncollectible accounts	3,011		2,928
Trade - net	70,476		56,204
Related parties	9,354		5,410
Other	436		899
Total accounts receivable - net	$	80,266	$	62,513

The following table provides the changes in the Company’s allowance for uncollectible accounts for the first half ended June 18, 2022, and the fiscal year ended January 1, 2022:

(thousands)	June 18, 2022		January 1, 2022
Balance at beginning of period	$	2,928	$	2,502
Provision for uncollectible accounts	453		1,930
Accounts written off, net of recoveries	(370)		(1,504)
Balance at end of period	$	3,011	$	2,928

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INVENTORY (Tables)

6 Months Ended

Jun. 18, 2022

Inventory Disclosure [Abstract]

Schedule of Inventory

The carrying value of inventory consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Solvents and solutions	$	10,429	$	7,704
Used oil and processed oil	12,734		9,361
Machines	5,175		4,995
Drums and supplies	6,028		5,731
Other	2,297		2,246
Total inventory	36,663		30,037
Less: machine refurbishing reserve	442		501
Total inventory - net	$	36,221	$	29,536

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 18, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table shows changes to our goodwill balances by segment from January 1, 2022 to June 18, 2022:

(thousands)	Environmental Services		Total
Goodwill at January 1, 2022
Gross carrying amount	$	49,695	$	49,695
Accumulated impairment loss	—		—
Net book value at January 1, 2022	$	49,695	$	49,695
Goodwill at June 18, 2022
Gross carrying amount	49,695		$	49,695
Accumulated impairment loss	—		—
Net book value at June 18, 2022	$	49,695	$	49,695

Schedule of Finite-Lived Intangible Assets

The following is a summary of software and other intangible assets:

	June 18, 2022						January 1, 2022
(thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer & supplier relationships	$	47,167	$	22,918	$	24,249	$	47,167	$	20,725	$	26,442
Permits	13,590		1,249		12,341		13,590		879		12,711
Software	13,202		6,820		6,382		11,721		6,399		5,322
Non-compete agreements	4,427		3,511		916		4,048		3,340		708
Patents, formulae, and licenses	1,769		936		833		1,769		906		863
Other*	606		717		(111)		996		1,093		(97)
Total software and intangible assets	$	80,761	$	36,151	$	44,610	$	79,291	$	33,342	$	45,949

*Other intangibles include an above market lease acquired in September 2021 that had a fair value of ($0.7) million upon acquisition and is being accreted over the remaining useful life of the lease.

The weighted average useful lives of software and other intangibles are as follows:

	Weighted Average Useful Life (years)
Permits	16
Patents, formulae, & licenses	15
Customer and supplier relationships	12
Software	9
Non-compete agreements	5
Other	7

Finite-lived Intangible Assets Amortization Expense

The estimated amortization expense for the remainder of fiscal 2022 and each of the five succeeding fiscal years is as follows:

(millions)
Fiscal Year	Amortization Expense
2022	$3.4
2023	5.7
2024	4.1
2025	3.1
2026	2.5
2027	2.5

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ACCOUNTS PAYABLE (Tables)

6 Months Ended

Jun. 18, 2022

Payables and Accruals [Abstract]

Schedule of Accounts Payable

Accounts payable consisted of the following:

(thousands)	June 18, 2022		January 1, 2022
Accounts payable	$	44,105	$	35,613
Accounts payable - related parties	938		566
Total accounts payable	$	45,043	$	36,179

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SEGMENT INFORMATION (Tables)

6 Months Ended

Jun. 18, 2022

Segment Reporting [Abstract]

Schedule of Reconciliation of Segment Results to Consolidated

Segment results for the second quarter ended June 18, 2022 and June 19, 2021 were as follows:

Second Quarter Ended,
June 18, 2022
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	72,979	$	2,604	$	—	$	75,583
	Product revenues	12,634		62,156		—		74,790
	Rental income	6,265		9		—		6,274
Total revenues		$	91,878	$	64,769	$	—	$	156,647
Operating expenses
	Operating costs	68,914		35,841		—		104,755
	Operating depreciation and amortization	3,192		2,125		—		5,317
Profit before corporate selling, general, and administrative expenses		$	19,772	$	26,803	$	—	$	46,575
Selling, general, and administrative expenses						15,024		15,024
Depreciation and amortization from SG&A						1,460		1,460
Total selling, general, and administrative expenses						$	16,484	$	16,484
Other expense (income) - net						1,001		1,001
Operating income								29,090
Interest expense – net						250		250
Income before income taxes								$	28,840

Second Quarter Ended,
June 19, 2021
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	56,403	$	3,630	$	—	$	60,033
	Product revenues	10,627		40,924		—		51,551
	Rental income	5,686		9		—		5,695
Total revenues		$	72,716	$	44,563	$	—	$	117,279
Operating expenses
	Operating costs	51,119		27,210		—		78,329
	Operating depreciation and amortization	2,430		2,109		—		4,539
Profit before corporate selling, general, and administrative expenses		$	19,167	$	15,244	$	—	$	34,411
Selling, general, and administrative expenses						13,039		13,039
Depreciation and amortization from SG&A						1,080		1,080
Total selling, general, and administrative expenses						$	14,119	$	14,119
Other (income) - net						(330)		(330)
Operating income								20,622
Interest expense – net						177		177
Income before income taxes								$	20,445

Segment results for the first half ended June 18, 2022, and June 19, 2021 were as follows:

First Half Ended,
June 18, 2022
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	139,278	$	5,212	$	—	$	144,490
	Product revenues	25,023		114,249		—		139,272
	Rental income	12,228		23		—		12,251
Total revenues		$	176,529	$	119,484	$	—	$	296,013
Operating expenses
	Operating costs	136,532		70,006		—		206,538
	Operating depreciation and amortization	6,081		4,209		—		10,290
Profit before corporate selling, general, and administrative expenses		$	33,916	$	45,269	$	—	$	79,185
Selling, general, and administrative expenses						28,759		28,759
Depreciation and amortization from SG&A						2,995		2,995
Total selling, general, and administrative expenses						$	31,754	$	31,754
Other expense (income) - net						791		791
Operating income								46,640
Interest expense – net						473		473
Income before income taxes								$	46,167

First Half Ended,
June 19, 2021
(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
Service revenues	$	109,706	$	8,026			$	117,732
Product revenues	21,374		72,443		—		93,817
Rental income	11,093		18				11,111
Total revenues	$	142,173	$	80,487	$	—	$	222,660
Operating expenses
Operating costs	102,999		52,100		—		155,099
Operating depreciation and amortization	4,008		3,058				7,066
Profit (loss) before corporate selling, general, and administrative expenses	$	35,166	$	25,329	$	—	$	60,495
Selling, general, and administrative expenses					25,228		25,228
Depreciation and amortization from SG&A					2,335		2,335
Total selling, general, and administrative expenses					$	27,563	$	27,563
Other (income) - net					(439)		(439)
Operating income							33,371
Interest expense – net					501		501
Income before income taxes							$	32,870

Schedule of Reconciliation of Assets by Segment to Consolidated

Total assets by segment as of June 18, 2022 and January 1, 2022 were as follows:

(thousands)		June 18, 2022		January 1, 2022
Total Assets:
	Environmental Services	$	294,619	$	281,333
	Oil Business	187,999		171,188
	Unallocated Corporate Assets	96,919		74,343
Total		$	579,537	$	526,864

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COMMITMENTS AND CONTINGENCIES (Tables)

6 Months Ended

Jun. 18, 2022

Commitments and Contingencies Disclosure [Abstract]

Rental Income

Rental income was as follows:

	Second Quarter Ended,
	June 18, 2022						June 19, 2021
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	6,233	$	—	$	6,233	$	5,636	$	—	$	5,636
Property	32		9		41		50		9		59
Total rental income	$	6,265	$	9	$	6,274	$	5,686	$	9	$	5,695

	First Half Ended,
	June 18, 2022						June 19, 2021
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	12,172	$	—	$	12,172	$	11,043	$	—	$	11,043
Property	56		23		79		50		18		68
Total rental income	$	12,228	$	23	$	12,251	$	11,093	$	18	$	11,111

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SHARE-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 18, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Restricted Stock Unit Activity

The following table shows a summary of restricted share grants and expense resulting from the awards:

    

			Compensation Expense
(thousands, except share amounts)			First Half Ended,		Unrecognized Expense as of,
Recipient of Grant	Grant Date	Restricted Shares	June 18, 2022	June 19, 2021	June 18, 2022	June 19, 2021
Special Incentive Grant	April, 2018	350,000	380	810	—	1,111
Members of Management	May, 2019	23,560	—	110	—	145
Members of Management	February, 2020	41,138	40	66	47	280
Chief Executive Officer	February, 2021	500,000	1,067	912	2,814	5,310
Members of Management	February, 2021	35,898	103	71	345	586
Board of Directors	April, 2021	11,487	—	150	—	182
Members of Management	February, 2022	75,355	245	—	1,303	—
Board of Directors	April, 2022	17,082	234	—	246	—

The following table summarizes the restricted stock activity for the second quarter ended June 18, 2022:

Restricted Stock (Nonvested Shares)	Number of Shares	Weighted Average Grant-Date Fair Value Per Share
Nonvested shares outstanding at January 1, 2022	723,983	$	21.83
Granted	92,437	27.64
Vested	(107,772)	23.05
Forfeited	(128,297)	22.35
Nonvested shares outstanding at June 18, 2022	580,351	$	23.27

Schedule of Restricted Stock Vesting Percentages

Vesting Table
Increase in Stock Price From the Amended Agreement Commencement Date to the Vesting Date	Total Percentage of Restricted Stock Shares to Be Vested
Less than $5 per share increase	—%
$5 per share increase	25% (vest in 125,000 shares)
$10 per share increase	50% (vest in 250,000 shares)
$15 per share increase	75% (vest in 375,000 shares)
$20 or more per share increase	100% (vest in 500,000 shares)

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EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 18, 2022

Earnings Per Share [Abstract]

Schedule of Weighted Average Basic and Diluted Shares Outstanding

The following table reconciles the number of shares outstanding for the second quarter of fiscal 2022 and 2021, respectively, to the number of weighted average basic shares outstanding and the number of weighted average diluted shares outstanding for the purposes of calculating basic and diluted earnings per share:

	Second Quarter Ended,				First Half Ended,
(thousands, except per share amounts)	June 18, 2022		June 19, 2021		June 18, 2022		June 19, 2021
Net income	$	21,107	$	15,111	$	33,985	$	24,317
Weighted average basic shares outstanding	23,489		23,404		23,482		23,389
Dilutive shares for share–based compensation plans	155		161		158		148
Weighted average diluted shares outstanding	23,644		23,565		23,640		23,537
Net income per share: basic	$	0.90	$	0.65	$	1.45	$	1.04
Net income per share: diluted	$	0.89	$	0.64	$	1.44	$	1.03

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FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 18, 2022

Fair Value Disclosures [Abstract]

Schedule of Assets Measured on Recurring Basis

The following tables summarize assets measured at fair value on a recurring basis (in millions) as of June 18, 2022:

	Quoted prices in active markets (Level 1)	Significant other observable inputs (Level 2)	Significant unobservable inputs (Level 3)	Fair Value Measurements
Equity Securities (1)	$—	$—	$3.0	$3.0

(1) Represents a $3.0 million investment the Company invested in its privately held battery recycling partner, HBR Retriev Holdco, LLC ("Retriev"). Retriev is a Limited Liability Company that is controlled by the Heritage Group, an affiliate of the Company.

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ORGANIZATION AND NATURE OF OPERATIONS (Details)	6 Months Ended
	Jun. 18, 2022 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	2

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BUSINESS COMBINATIONS - Narrative (Details) - USD ($) $ in Thousands	Jun. 18, 2022	Sep. 27, 2021	Sep. 13, 2021	Apr. 24, 2021
Source Environmental, Inc.
Business Acquisition [Line Items]
Purchase price	$ 20,433	$ 20,400
Raider Environmental Services of Florida, Inc.
Business Acquisition [Line Items]
Purchase price	13,727		$ 13,700
Cole's Environmental
Business Acquisition [Line Items]
Purchase price	$ 17,292			$ 17,300

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BUSINESS COMBINATIONS - Estimated Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 18, 2022	Jan. 01, 2022	Sep. 27, 2021	Sep. 13, 2021	Apr. 24, 2021
Business Acquisition [Line Items]
Goodwill	$ 49,695	$ 49,695
Source Environmental, Inc.
Business Acquisition [Line Items]
Accounts receivable	1,064
Inventory	0
Other current assets	6
Property, plant, & equipment	174
Intangible assets	13,692
Goodwill	6,174
Accounts payable and accruals	(677)
Total purchase price, net of cash acquired	20,433		$ 20,400
Less: contingent consideration	0
Less: to be placed in escrow	0
Net cash paid	20,433
Raider Environmental Services of Florida, Inc.
Business Acquisition [Line Items]
Accounts receivable	488
Inventory	0
Other current assets	162
Property, plant, & equipment	4,404
Intangible assets	6,056
Goodwill	2,835
Accounts payable and accruals	(218)
Total purchase price, net of cash acquired	13,727			$ 13,700
Less: contingent consideration	0
Less: to be placed in escrow	0
Net cash paid	13,727
Cole's Environmental
Business Acquisition [Line Items]
Accounts receivable	0
Inventory	73
Other current assets	0
Property, plant, & equipment	2,455
Intangible assets	9,620
Goodwill	5,144
Accounts payable and accruals	0
Total purchase price, net of cash acquired	17,292				$ 17,300
Less: contingent consideration	5,819
Less: to be placed in escrow	100
Net cash paid	$ 11,373

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REVENUE - Schedule of Disaggregation of Revenue by Major Lines (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021
Revenue from Contract with Customer [Abstract]
Performance obligation timing			We do not have any material significant payment terms as payment is generally due within 30 days after the performance obligation has been satisfactorily completed. The Company has elected the practical expedient to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less. In applying the guidance in Topic 606, there were no judgments or estimates made that the Company deems significant.
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 150,373	$ 111,584	$ 283,762	$ 211,549
Rental income	6,274	5,695	12,251	11,111
Total revenues	156,647	117,279	296,013	222,660
Parts Cleaning, Containerized Waste, & related products/services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	50,320	40,741	97,176	79,574
Wastewater Vacuum Services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	21,150	14,848	38,541	28,541
Field Services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	6,539	4,749	12,829	8,845
Antifreeze Business
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	7,118	6,285	14,774	13,273
Environmental Services - Other
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	486	407	981	847
Re-Refinery Product Sales
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	54,198	38,830	103,337	68,883
Oil Collection Services & RFO
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	9,253	4,552	13,566	9,169
Oil Filter Business
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,309	1,172	2,558	2,417
Environmental Services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	85,613	67,030	164,301	131,080
Rental income	6,265	5,686	12,228	11,093
Total revenues	91,878	72,716	176,529	142,173
Environmental Services | Parts Cleaning, Containerized Waste, & related products/services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	50,320	40,741	97,176	79,574
Environmental Services | Wastewater Vacuum Services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	21,150	14,848	38,541	28,541
Environmental Services | Field Services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	6,539	4,749	12,829	8,845
Environmental Services | Antifreeze Business
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	7,118	6,285	14,774	13,273
Environmental Services | Environmental Services - Other
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	486	407	981	847
Environmental Services | Re-Refinery Product Sales
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Environmental Services | Oil Collection Services & RFO
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Environmental Services | Oil Filter Business
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Oil Business
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	64,760	44,554	119,461	80,469
Rental income	9	9	23	18
Total revenues	64,769	44,563	119,484	80,487
Oil Business | Parts Cleaning, Containerized Waste, & related products/services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Oil Business | Wastewater Vacuum Services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Oil Business | Field Services
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Oil Business | Antifreeze Business
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Oil Business | Environmental Services - Other
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Oil Business | Re-Refinery Product Sales
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	54,198	38,830	103,337	68,883
Oil Business | Oil Collection Services & RFO
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	9,253	4,552	13,566	9,169
Oil Business | Oil Filter Business
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 1,309	$ 1,172	$ 2,558	$ 2,417

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REVENUE - Contract Assets and Contract Liabilities from Contracts with Customers (Details) - USD ($) $ in Thousands	Jun. 18, 2022	Jan. 01, 2022
Revenue from Contract with Customer [Abstract]
Contract assets	$ 73	$ 268
Contract liabilities	2,719	2,362
Contract liabilities - net	$ 2,646	$ 2,094

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REVENUE - Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 18, 2022	Jun. 18, 2022
Revenue from Contract with Customer [Abstract]
Revenue recognized	$ 0	$ 2,400,000

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ACCOUNTS RECEIVABLE - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 18, 2022	Jan. 01, 2022	Jan. 02, 2021
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Trade	$ 73,487	$ 59,132
Less: allowance for uncollectible accounts	3,011	2,928	$ 2,502
Trade - net	70,476	56,204
Related parties	9,354	5,410
Other	436	899
Total accounts receivable - net	$ 80,266	$ 62,513

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ACCOUNTS RECEIVABLE - Rollforward of Allowance (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jan. 01, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 2,928	$ 2,502	$ 2,502
Provision for uncollectible accounts	453	$ 567	1,930
Accounts written off, net of recoveries	(370)		(1,504)
Balance at end of period	$ 3,011		$ 2,928

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INVENTORY - Carrying Value of Inventory (Details) - USD ($)	3 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jan. 01, 2022
Inventory Disclosure [Abstract]
Solvents and solutions	$ 10,429,000		$ 7,704,000
Used oil and processed oil	12,734,000		9,361,000
Machines	5,175,000		4,995,000
Drums and supplies	6,028,000		5,731,000
Other	2,297,000		2,246,000
Total inventory	36,663,000		30,037,000
Less: machine refurbishing reserve	442,000		501,000
Total inventory - net	36,221,000		$ 29,536,000
Inventory impairment charge	$ 0	$ 200,000

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GOODWILL AND OTHER INTANGIBLE ASSETS - Goodwill Balances (Details) - USD ($) $ in Thousands	Jun. 18, 2022	Jan. 01, 2022
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 49,695	$ 49,695
Accumulated impairment loss	0	0
Net book value	49,695	49,695
Environmental Services
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	49,695	49,695
Accumulated impairment loss	0	0
Net book value	$ 49,695	$ 49,695

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GOODWILL AND OTHER INTANGIBLE ASSETS - Software and Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 18, 2022	Jan. 01, 2022	Sep. 30, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 80,761	$ 79,291
Accumulated Amortization	36,151	33,342
Net Carrying Amount	44,610	45,949
Customer & supplier relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	47,167	47,167
Accumulated Amortization	22,918	20,725
Net Carrying Amount	24,249	26,442
Permits
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,590	13,590
Accumulated Amortization	1,249	879
Net Carrying Amount	12,341	12,711
Software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,202	11,721
Accumulated Amortization	6,820	6,399
Net Carrying Amount	6,382	5,322
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,427	4,048
Accumulated Amortization	3,511	3,340
Net Carrying Amount	916	708
Patents, formulae, and licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,769	1,769
Accumulated Amortization	936	906
Net Carrying Amount	833	863
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	606	996	$ (700)
Accumulated Amortization	717	1,093
Net Carrying Amount	$ (111)	$ (97)

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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 1.4	$ 1.0	$ 2.8	$ 2.3

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GOODWILL AND OTHER INTANGIBLE ASSETS - Weighted Average Useful Life (Details)	6 Months Ended
	Jun. 18, 2022
Permits
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	16 years
Patents, formulae, and licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	15 years
Customer & supplier relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	12 years
Software
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	9 years
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	5 years
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	7 years

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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Expected Amortization Expense (Details) $ in Millions	Jun. 18, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2022	$ 3.4
2023	5.7
2024	4.1
2025	3.1
2026	2.5
2027	$ 2.5

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ACCOUNTS PAYABLE (Details) - USD ($) $ in Thousands	Jun. 18, 2022	Jan. 01, 2022
Payables and Accruals [Abstract]
Accounts payable	$ 44,105	$ 35,613
Accounts payable - related parties	938	566
Total accounts payable	$ 45,043	$ 36,179

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DEBT AND FINANCING ARRANGEMENTS - Narrative (Details) - USD ($)		3 Months Ended			6 Months Ended
	Mar. 18, 2021	Jun. 18, 2022	Jun. 19, 2021	Mar. 27, 2021	Jun. 18, 2022	Jun. 19, 2021	Jan. 01, 2022
Debt Instrument [Line Items]
Repayment of term loan					$ 0	$ 30,000,000
Debt issuance costs					0	$ 822,000
Outstanding borrowings		$ 0			0		$ 0
Interest costs incurred		300,000	$ 300,000
Letters of credit outstanding		6,700,000			6,700,000		5,600,000
Current borrowing capacity		$ 93,300,000			$ 93,300,000		$ 94,400,000
Previous term loan | Term Loan
Debt Instrument [Line Items]
Repayment of term loan				$ 30,000,000
Agreement
Debt Instrument [Line Items]
Debt issuance costs	$ 800,000
Minimum interest coverage ratio	3.5
Maximum total leverage ratio	3.00
Aggregate consideration limit	$ 10,000,000
Leverage ratio at time of acquisition	3.50
Agreement | Revolving Loan Portion
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 100,000,000
Accordion feature, increase limit (up to)	$ 50,000,000
Agreement | Revolving Loan Portion | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Agreement | Revolving Loan Portion | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Agreement | Revolving Loan Portion | LIBOR | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Agreement | Revolving Loan Portion | LIBOR | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Agreement | Revolving Loan Portion | Bank of America's Prime Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Agreement | Revolving Loan Portion | Bank of America's Prime Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Agreement | Swing Line loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 15,000,000

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SEGMENT INFORMATION - Operating Segment Results (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 18, 2022 USD ($)	Jun. 19, 2021 USD ($)	Jun. 18, 2022 USD ($) segment	Jun. 19, 2021 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Revenues
Revenues	$ 150,373	$ 111,584	$ 283,762	$ 211,549
Rental income	6,274	5,695	12,251	11,111
Total revenues	156,647	117,279	296,013	222,660
Operating expenses
Operating costs	104,755	78,329	206,538	155,099
Operating depreciation and amortization	5,317	4,539	10,290	7,066
Profit (loss) before corporate selling, general, and administrative expenses	46,575	34,411	79,185	60,495
Selling, general, and administrative expenses	15,024	13,039	28,759	25,228
Depreciation and amortization from SG&A	1,460	1,080	2,995	2,335
Total selling, general, and administrative expenses	16,484	14,119	31,754	27,563
Other expense (income) - net	1,001	(330)	791	(439)
Operating income	29,090	20,622	46,640	33,371
Interest expense – net	250	177	473	501
Income before income taxes	28,840	20,445	46,167	32,870
Environmental Services
Revenues
Revenues	85,613	67,030	164,301	131,080
Rental income	6,265	5,686	12,228	11,093
Total revenues	91,878	72,716	176,529	142,173
Oil Business
Revenues
Revenues	64,760	44,554	119,461	80,469
Rental income	9	9	23	18
Total revenues	64,769	44,563	119,484	80,487
Service revenues
Revenues
Revenues	75,583	60,033	144,490	117,732
Product revenues
Revenues
Revenues	74,790	51,551	139,272	93,817
Segments | Environmental Services
Revenues
Rental income	6,265	5,686	12,228	11,093
Total revenues	91,878	72,716	176,529	142,173
Operating expenses
Operating costs	68,914	51,119	136,532	102,999
Operating depreciation and amortization	3,192	2,430	6,081	4,008
Profit (loss) before corporate selling, general, and administrative expenses	19,772	19,167	33,916	35,166
Segments | Oil Business
Revenues
Rental income		9	23	18
Total revenues	64,769	44,563	119,484	80,487
Operating expenses
Operating costs	35,841	27,210	70,006	52,100
Operating depreciation and amortization	2,125	2,109	4,209	3,058
Profit (loss) before corporate selling, general, and administrative expenses	26,803	15,244	45,269	25,329
Segments | Service revenues | Environmental Services
Revenues
Revenues	72,979	56,403	139,278	109,706
Segments | Service revenues | Oil Business
Revenues
Revenues	2,604	3,630	5,212	8,026
Segments | Product revenues | Environmental Services
Revenues
Revenues	12,634	10,627	25,023	21,374
Segments | Product revenues | Oil Business
Revenues
Revenues	62,156	40,924	114,249	72,443
Corporate and Eliminations
Revenues
Rental income	0	0	0
Total revenues	0	0	0	0
Operating expenses
Operating costs	0	0	0	0
Operating depreciation and amortization	0	0	0
Profit (loss) before corporate selling, general, and administrative expenses	0	0	0	0
Selling, general, and administrative expenses	15,024	13,039	28,759	25,228
Depreciation and amortization from SG&A	1,460	1,080	2,995	2,335
Total selling, general, and administrative expenses	16,484	14,119	31,754	27,563
Other expense (income) - net	1,001	(330)	791	(439)
Interest expense – net	250	177	473	501
Corporate and Eliminations | Service revenues
Revenues
Revenues	0	0	0
Corporate and Eliminations | Product revenues
Revenues
Revenues	$ 0	$ 0	$ 0	$ 0

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SEGMENT INFORMATION - Assets by Segment (Details) - USD ($) $ in Thousands	Jun. 18, 2022	Jan. 01, 2022
Segment Reporting Information [Line Items]
Assets	$ 579,537	$ 526,864
Segments | Environmental Services
Segment Reporting Information [Line Items]
Assets	294,619	281,333
Segments | Oil Business
Segment Reporting Information [Line Items]
Assets	187,999	171,188
Unallocated Corporate Assets
Segment Reporting Information [Line Items]
Assets	$ 96,919	$ 74,343

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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Millions	Jun. 18, 2022	Jan. 01, 2022
Lessee, Lease, Description [Line Items]
Lease renewal term	5 years
Remaining amount committed	$ 16.8	$ 16.5
Loss contingency accrual	$ 3.9	$ 3.2
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 month
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	12 years

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COMMITMENTS AND CONTINGENCIES - Rental Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021
Lessor, Lease, Description [Line Items]
Rental income	$ 6,274	$ 5,695	$ 12,251	$ 11,111
Environmental Services
Lessor, Lease, Description [Line Items]
Rental income	6,265	5,686	12,228	11,093
Oil Business
Lessor, Lease, Description [Line Items]
Rental income	9	9	23	18
Parts Cleaning
Lessor, Lease, Description [Line Items]
Rental income	6,233	5,636	12,172	11,043
Parts Cleaning | Environmental Services
Lessor, Lease, Description [Line Items]
Rental income	6,233	5,636	12,172	11,043
Parts Cleaning | Oil Business
Lessor, Lease, Description [Line Items]
Rental income	0	0	0	0
Property
Lessor, Lease, Description [Line Items]
Rental income	41	59	79	68
Property | Environmental Services
Lessor, Lease, Description [Line Items]
Rental income	32	50	56	50
Property | Oil Business
Lessor, Lease, Description [Line Items]
Rental income	$ 9	$ 9	$ 23	$ 18

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INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021
Valuation Allowance [Line Items]
Provision for income taxes	$ 7,733	$ 5,334	$ 12,182	$ 8,553
Effective income tax rate, percent	27.00%	26.10%	26.40%	26.00%
Uncertain tax positions
Valuation Allowance [Line Items]
Valuation allowance	$ 2,200		$ 2,200
Foreign Net Operating Loss Carryforwards
Valuation Allowance [Line Items]
Valuation allowance	$ 600		$ 600

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SHARE-BASED COMPENSATION - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 01, 2021	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)	$ 21.77
Compensation expense		$ 234,000	$ 0
Unrecognized compensation expense		246,000	0	$ 246,000
Restricted stock | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				1 year
Restricted stock | Members of Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				3 years
Restricted stock | Members of Management | February, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		103,000	71,000
Unrecognized compensation expense		345,000	586,000	$ 345,000
Restricted stock | Mr. Recatto
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	180 days
Grants in period (in shares)	500,000
Vesting threshold (in dollars per share)	$ 5.00
Shares vested upon achievement of share price threshold (in shares)	0
Compensation expense		1,100,000
Unrecognized compensation expense		2,800,000		$ 2,800,000
Risk-free rate	0.29%
Expected dividend yield	0.00%
Expected volatility rate	53.07%
Vesting percentage	50.00%
Restricted stock | Mr. Recatto | Less than $5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				0.00%
Restricted stock | Mr. Recatto | $5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				25.00%
Restricted stock | Mr. Recatto | $10 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				50.00%
Restricted stock | Mr. Recatto | February, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		1,067,000	912,000
Unrecognized compensation expense		2,814,000	$ 5,310,000	$ 2,814,000
Time Based Restricted Stock | Mr. Recatto
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				90 days
Compensation expense		$ 300,000
Time Based Restricted Stock | Mr. Recatto | Less than $5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of restricted stock							$ 500,000
Time Based Restricted Stock | Mr. Recatto | $5 per share increase | Estimate
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of restricted stock						$ 500,000
Time Based Restricted Stock | Mr. Recatto | $10 per share increase | Estimate
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of restricted stock					$ 500,000

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SHARE-BASED COMPENSATION - Restricted Stock Compensation/Awards (Details) - USD ($) $ in Thousands	1 Months Ended							3 Months Ended		6 Months Ended
	Apr. 30, 2022	Feb. 28, 2022	Apr. 30, 2021	Feb. 28, 2021	Feb. 29, 2020	May 31, 2019	Apr. 30, 2018	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)										92,437
Compensation Expense								$ 234	$ 0
Unrecognized Expense								246	0	$ 246
Restricted stock | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense								1,100
Unrecognized Expense								2,800		2,800
Restricted stock | April, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)							350,000
Compensation Expense								380	810
Unrecognized Expense								0	1,111	0
Restricted stock | May, 2019 | Members of Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)						23,560
Compensation Expense								0	110
Unrecognized Expense								0	145	0
Restricted stock | February, 2020 | Members of Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)					41,138
Compensation Expense								40	66
Unrecognized Expense								47	280	47
Restricted stock | February, 2021 | Members of Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)				35,898
Compensation Expense								103	71
Unrecognized Expense								345	586	345
Restricted stock | February, 2021 | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)				500,000
Compensation Expense								1,067	912
Unrecognized Expense								2,814	5,310	2,814
Restricted stock | April, 2021 | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)			11,487
Compensation Expense								0	150
Unrecognized Expense								0	182	0
Restricted stock | February, 2022 | Members of Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)		75,355
Compensation Expense								245	0
Unrecognized Expense								$ 1,303	$ 0	$ 1,303
Restricted stock | April, 2022 | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)	17,082

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SHARE-BASED COMPENSATION - Restricted Stock Vesting Schedule by Percentage (Details) - $ / shares		6 Months Ended
	Feb. 01, 2021	Jun. 18, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (in shares)		107,772
Mr. Recatto | Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Percentage of Restricted Stock Shares to Be Vested	50.00%
Mr. Recatto | Restricted stock | Less than $5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)		$ 5
Total Percentage of Restricted Stock Shares to Be Vested		0.00%
Mr. Recatto | Restricted stock | $5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)		$ 5
Total Percentage of Restricted Stock Shares to Be Vested		25.00%
Vested (in shares)		125,000
Mr. Recatto | Restricted stock | $10 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)		$ 10
Total Percentage of Restricted Stock Shares to Be Vested		50.00%
Vested (in shares)		250,000
Mr. Recatto | Restricted stock | $15 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)		$ 15
Total Percentage of Restricted Stock Shares to Be Vested		75.00%
Vested (in shares)		375,000
Mr. Recatto | Restricted stock | $20 or more per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)		$ 20
Total Percentage of Restricted Stock Shares to Be Vested		100.00%
Vested (in shares)		500,000

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SHARE-BASED COMPENSATION - Restricted Stock Rollforward (Details)	6 Months Ended
	Jun. 18, 2022 $ / shares shares
Number of Shares
Nonvested shares outstanding at beginning of period (in shares) | shares	723,983
Granted (in shares) | shares	92,437
Vested (in shares) | shares	(107,772)
Forfeited (in shares) | shares	(128,297)
Nonvested shares outstanding at end of period (in shares) | shares	580,351
Weighted Average Grant-Date Fair Value Per Share
Nonvested shares outstanding at beginning of period (in dollars per share) | $ / shares	$ 21.83
Granted (in dollars per share) | $ / shares	27.64
Vested (in dollars per share) | $ / shares	23.05
Forfeited (in dollars per share) | $ / shares	22.35
Nonvested shares outstanding at end of period (in dollars per share) | $ / shares	$ 23.27

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SHARE-BASED COMPENSATION - Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan - Employee stock	3 Months Ended
	Jun. 18, 2022 $ / shares shares
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Shares available employee stock purchase plan (in shares)	51,718
Issuance of common stock – ESPP (in shares)	4,794
Weighted average fair value per share ESPP (in dollars per share) | $ / shares	$ 29.77

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021
Earnings Per Share [Abstract]
Net income	$ 21,107	$ 15,111	$ 33,985	$ 24,317
Weighted average basic shares outstanding (in shares)	23,489	23,404	23,482	23,389
Dilutive shares for share–based compensation plans (in shares)	155	161	158	148
Number of weighted average shares outstanding: diluted (in shares)	23,644	23,565	23,640	23,537
Net income per share: basic (in dollars per share)	$ 0.90	$ 0.65	$ 1.45	$ 1.04
Net income per share: diluted (in dollars per share)	$ 0.89	$ 0.64	$ 1.44	$ 1.03

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FAIR VALUE MEASUREMENTS - Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 18, 2022	Jan. 01, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments at fair value	$ 3,000	$ 0
Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments at fair value	3,000
Recurring | Quoted prices in active markets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments at fair value	0
Recurring | Significant other observable inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments at fair value	0
Recurring | Significant unobservable inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments at fair value	$ 3,000

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OTHER (INCOME) EXPENSE - NET (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 18, 2022	Jun. 19, 2021	Jun. 18, 2022	Jun. 19, 2021
Other Income and Expenses [Abstract]
Other (income) expense - net	$ 1,001	$ (330)	$ 791	$ (439)
Net loss on disposal of assets			$ 1,100

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SUBSEQUENT EVENTS (Details) - Subsequent event - Patriot Environmental Services, Inc. $ in Millions	Jun. 29, 2022 USD ($) location
Schedule of Equity Method Investments [Line Items]
Aggregate cash consideration | $	$ 156
Operation locations | location	18