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 quarter ended March 22, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Gregory Ray, 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:

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: May 12, 2008	By: /s/ Gregory Ray
	Gregory Ray
	Chief Financial Officer, Vice President, Business Management and Secretary