-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, OlQAVyxNuPCecmfvtFfh1tYUJPTQSZJBxdGy1kxzUsLJWI/N03zTvUP8vXGrIUhn IzTweifNvZ2KDnrX1XAv7Q== 0000898430-97-000537.txt : 19970222 0000898430-97-000537.hdr.sgml : 19970222 ACCESSION NUMBER: 0000898430-97-000537 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 19970213 SROS: NONE SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: TETRA TECH INC CENTRAL INDEX KEY: 0000831641 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-ENGINEERING SERVICES [8711] IRS NUMBER: 954148514 STATE OF INCORPORATION: DE FISCAL YEAR END: 0930 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-43035 FILM NUMBER: 97530553 BUSINESS ADDRESS: STREET 1: 670 N ROSEMEAD BOULEVARD CITY: PASEDENA STATE: CA ZIP: 91107-2190 BUSINESS PHONE: 8184496400 MAIL ADDRESS: STREET 1: 670 N ROSEMEAD BLVD CITY: PASADENA STATE: CA ZIP: 91107 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: HWANG LI-SAN CENTRAL INDEX KEY: 0000938431 STANDARD INDUSTRIAL CLASSIFICATION: [] FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 670 N ROSEMEAD BLVD CITY: PASADENA STATE: CA ZIP: 91107 BUSINESS PHONE: 8183514664 MAIL ADDRESS: STREET 1: 670 N ROSEMEAD BLVD CITY: PASADENA STATE: CA ZIP: 91107 SC 13G/A 1 AMENDMENT #4 TO SCHEDULE 13G -------------------------- OMB APPROVAL -------------------------- OMB NUMBER 3235-0145 Expires: October 31, 1994 Estimated average burden hours per form.....,14.90 ------------------------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 4 )* --- Tetra Tech, Inc. - -------------------------------------------------------------------------------- (Name of Issuer) COMMON STOCK, $0.01 par value - -------------------------------------------------------------------------------- (Title of Class of Securities) 881 62G 103 --------------------- (CUSIP Number) Check the following box if a fee is being paid with the statement [_]. (A fee is not required only if the reporting person: (1) has a previous statement on file reporting beneficial ownership of more than five percent of the class of securities described in Item 1; and (2) has filed no amendment subsequent thereto reporting beneficial ownership of five percent or less of such class.) (See Rule 13d-7.) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). Page 1 of 5 SCHEDULE 13G - ----------------------- --------------------- CUSIP NO. 881 62G 103 PAGE 2 OF 5 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Li-San Hwang - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [_] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 United States - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 1,121,757 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 -0- OWNED BY ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 1,121,757 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 -0- - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 1,121,757 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 11 7.9% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 IN - ------------------------------------------------------------------------------ *SEE INSTRUCTION BEFORE FILLING OUT! SCHEDULE 13G - ----------------------- --------------------- CUSIP NO. 881 62G 103 PAGE 3 OF 5 PAGES - ----------------------- --------------------- ITEM 1. (a) NAME OF ISSUER Tetra Tech, Inc. (b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES 670 North Rosemead Boulevard Pasadena, California 91107 ITEM 2. (a) NAME OF PERSON FILING Li-San Hwang (b) ADDRESS OF PRINCIPAL OFFICE 670 North Rosemead Boulevard Pasadena, California 91107 (c) CITIZENSHIP United States of America (d) TITLE OF CLASS OF SECURITIES Common Stock, $.01 par value (e) CUSIP NUMBER 881 62G 103 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR 13d- 2(b), CHECK WHETHER THE PERSON FILING IS A: Not Applicable ITEM 4. OWNERSHIP (a) AMOUNT BENEFICIALLY OWNED: 1,121,757 (b) PERCENT OF CLASS: 7.9% SCHEDULE 13G - ----------------------- --------------------- CUSIP NO. 881 62G 103 PAGE 4 OF 5 PAGES - ----------------------- --------------------- (c) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS: (i) SOLE POWER TO VOTE OR TO DIRECT THE VOTE: 1,121,757 (ii) SHARED POWER TO VOTE OR TO DIRECT THE VOTE: -0- (iii) SOLE POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF: 1,121,757 (iv) SHARED POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF: -0- ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS Not Applicable. ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON Not Applicable. ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY Not Applicable. ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP Not Applicable. ITEM 9. NOTICE OF DISSOLUTION OF GROUP Not Applicable. ITEM 10. CERTIFICATION Not Applicable. SCHEDULE 13G - ----------------------- --------------------- CUSIP NO. 881 62G 103 PAGE 5 OF 5 PAGES - ----------------------- --------------------- SIGNATURES AFTER REASONABLE INQUIRY AND TO THE BEST OF MY KNOWLEDGE AND BELIEF, I CERTIFY THAT THE INFORMATION SET FORTH IN THIS STATEMENT IS TRUE, COMPLETE AND CORRECT. /s/ Li-San Hwang _________________________________________ LI-SAN HWANG DATE: FEBRUARY 7, 1997 -----END PRIVACY-ENHANCED MESSAGE-----