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SECOR <br />0 1110111111011011 /11L01P01 ah"(1 <br />�a <br />April 12, 2001 -' <br />Project 077 43452 570 -- <br />Mr Bob Cochran = - <br />Chevron Products Company <br />P O Box 6004 .� <br />San Ramon, CA <br />RE First Quarter 2001 Remedial System Evaluation Report <br />Former Chevron #9-5775 <br />301 West Kettleman Lane <br />Lodi, California <br />Cleanup and Abatement Order No 5-00-704 <br />Dear Mr Cochran <br />SECOR International Incorporated (SECOR), on behalf of Chevron Products Company <br />(Chevron), presents operating data for the groundwater extraction (GWE) and soil vapor <br />iextraction (SVE) systems at the site referenced above (Figures I and 2) GWE and SVE <br />systems were initiated on July 3, 2000 A brief description and performance evaluation <br />of the remedial system between December 27, 2000 and March 28, 2001, are presented <br />below <br />GROUNDWATER EXTRACTION SYSTEM <br />GWE system extracts groundwater from site wells EX -1, MW-14/EX-2, and EX -3 <br />Extraction and treatment of groundwater from EX -1, EX-2/MW- 14, and EX -3 was <br />initiated on July 3, September 22, and November 28, 2000, respectively Extracted <br />groundwater is routed through a particulate filter, then three 2,000 -pound liquid phase <br />activated carbon vessels plumbed in series as A, B, and C <br />Samples were collected form the influent port, midpoint 1 (between the first and second <br />carbon vessels), midpoint 2 (between the second and third carbon vessels), and the <br />effluent port on a weekly basis during the first quarter During the first quarter, total <br />petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and <br />xylenes (BTEX compounds), di -isopropyl ether (DIPE), ethylene dibromide (EDB), and <br />1,2-dichloroethane (1,2 -DCA) concentrations were not detected in influent, midpoint 1 <br />(mid -1), midpoint 2 (mid -2), or effluent samples <br />Maximum influent concentrations of methyl tertiary butyl ether (MtBE), ethyl tertiary <br />butyl ether (EtBE), tertiary butyl alcohol (TBA), and tertiary amyl methyl ether (TAME) <br />3017 K11go, e Road, 5ude 100, Rancho Cordot a CA 95670 916 861 0400 9161501 0430 Fa i it it it secor coin <br />