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V Advanced � 0 GeoEnvironmental, Inc. =0= :- 08 August 2002 AGE-NC Project No 96-0232 Mr Marty Hartzell D California Regional Water Quality Control Board- Central Valley Region AUG 14 2002 3443 Routier Road, Suite A Sacramento, CA 95827 ENVIRONMENT HEALTH PERMIT/SERVICES Subject: Addendum to Quarterly Report- Second Quarter 2002, dated 15 July 2002 FLAG CITY CHEVRON- 6421 Capitol Avenue, Lodi, CA 95242 Dear Mr Hartzell On behalf of the Bokides Family Limited Partnership, Advanced GeoEnvironmentaI, Inc (AGE) previously submitted a quarterly report(Quarterly Report-Second Quarter 2002,dated 15 July 2002) for the Flag City Chevron site located at 6421 Capitol Avenue, Lodi, California In accordance with National Pollutant Discharge Elimination System. (NPDES) Permit No CAG915001 and State �} Implementation Policy (SIP) sampling requirements, water samples were collected from the ground water pump-and-treat remediation system effluent sampling point on 13 June 2002 and analyzed for a variety of potential waste constituents, however, the laboratory analysis were not reported in the above referenced quarterly report due to extended laboratory turn-around times Therefore,AGE is submitting the results of the NPDES-and SIP-required sampling as an addendum to the above quarterly report All water samples were logged on a chain-of-custody form,placed in a chilled container and transported to a California Department of Health Services (DHS)-certified laboratory for analysis for • Volatile Organic Compounds by EPA Method 8260, • Semi-Volatile Organic Compounds by EPA Method 8270, • Inorganic Compounds by appropriate EPA Methods (listed in Attachment IT of the SIP letter dated 27 December 2001), • Pesticides and Polychlorinated Biphenols (PCBs) by EPA Methods 8081 and 8082, and • General minerals and other constituents by appropriate EPA Methods (listed in Attachment II of the SIP letter dated 27 December 200 1) During the June 2002 sampling event,none of the analyzed volatile organic compounds (EPA Method 8260) or semi-volatile organic compounds (EPA Method 8270) were detected by laboratory analysis Laboratory results of the volatile organic and semi-volatile organic analysis are summarized in Tables 10 and 11 However, due to a laboratory oversight, the laboratory did not analyze for acroieim, acrylonitnle, hexachlorethane or 1,1,2-trichloro-1,2,2-tnfluoroethane by EPA Method 8260 or 1,2- benzanthracene, 3,4-benzofluoranthene, acenaphthene, acenaphythlene, anthracene, benzopyrene, lot benzopyrlene,benzofluoranthene,chrysene,di-benzo-anthracene,fluoranthene,fluorene,indenopyrene, 837 Shaw Road,Stockton,California 95215 Telephone (209) 467-1006 FAX(209) 467-1118