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SECOR www secor com <br /> INTERNATIONAL 3017 Kilgore Road Swte 100 <br /> S E C ® R INCORPORATED Rancho Cordova CA 95670 Ili <br /> 916-861-0400 TEL <br /> 916-861-0430 FAX <br /> a <br /> 1 <br /> 4 rr <br /> Oct 2s, 20o4 � �JYEL <br /> U L'T 2004 '� <br /> Mr Harlin Knoll 2 7 � I <br /> San Joaquin County Environmental Health Department _ .,vi,ENT HEALTH <br /> 304 East Weber Avenue, Third Floor I-. MIT/SERVICES t I} <br /> Stockton, California 95202 <br /> RE Third Quarter 2004 Groundwater Monitoring Report <br /> Chevron Station 9-3232 Jl ' <br /> 8660 Lower Sacramento Road <br /> Stockton, California <br /> SECOR Protect No 77CH 00000 23 0016 <br /> Dear Mr Knoll <br /> SECOR International Incorporated (SECOR) on behalf of Chevron Environmental Management ' <br /> Company (Chevron) has provided this report to summarize the third quarter 2004 (3Q2004) <br /> groundwater monitoring event at the above-referenced site lit <br /> COMPLETED ACTIVITIES -THIRD QUARTER 2004 ,i 'Im <br /> • Conducted quarterly groundwater monitoring and sampling, and, ; <br /> ■ Prepared and submitted quarterly groundwater monitoring report Ji <br /> fr�3 <br /> PLANNED ACTIVITIES — FOURTH QUARTER 2004 <br /> 4 <br /> ■ Conduct quarterly groundwater monitoring and sampling, and, 411 <br /> ■ Prepare and submit quarterly groundwater monitoring report Iv <br /> DISCUSSION <br /> On July 9, 2004, Gettler-Ryan Incorporated (G-R) performed 3Q2004 groundwater monitoring and ; <br /> sampling G-R's Groundwater monitoring report is included in Attachment A Depth to groundwater <br /> across the site ranged from 41 79 to 43 22 feet below ground surface (bgs) Groundwater elevation <br /> across the site decreased an average of 4 38 feet from the previous sampling event Groundwater <br /> flow was calculated to the southeast at an approximate gradient of 0 004 to 0 009 feet per foot(ft/ft) <br /> Ten wells were sampled during this event A summary of total petroleum hydrocarbons as gasoline `q <br /> (TPHg), benzene, methyl tertiary butyl ether (MtBE), and tertiary butyl alcohol (TBA) laboratory <br /> analytical data is listed below <br /> �r <br /> , <br /> j 4F� <br /> �1�41 <br /> i{�F; <br /> r <br /> 1 <br /> �l <br /> 1 IChevron193232kPenodic Mondonng12004t3Q2004 QMR 93232 doc SECOR International Incorporated �3 <br /> I, <br />