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'r <br /> SECOR 3p'17 Kiiyore Road Sude 100 <br /> INTERNATIONAL Rancho Cordova CA 95670 <br /> ® <br /> INCORPORATED 916-861-0400 TEL s <br /> 916-861-0430 FAX <br /> July 30, 2004 <br /> Mr Harlin Knoll D <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor JUL 3 0 2004 <br /> Stockton, California 95202 <br /> E PERMITISERVICES HEALTH <br /> RE Second Quarter 2004 Groundwater Monitoring Report � <br /> Former Chevron Station 9-8632 <br /> 575 Grant Line Road <br /> Tracy, California <br /> SECOR Project No 77CH 00000 23 0027 <br /> Dear Mr Knoll <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Environmental Management <br /> Company has provided this report to summarize the results of the second quarter 2004 (2Q2004) <br /> groundwater monitoring event at the above-referenced site <br /> COMPLETED ACTIVITIES - SECOND QUARTER 2004 <br /> • Conducted quarterly groundwater monitoring and sampling, and, <br /> • Prepared and submitted quarterly groundwater monitoring report <br /> PLANNED ACTIVITIES -THIRD QUARTER 2004 <br /> W <br /> • Conduct quarterly groundwater monitoring and sampling, and, <br /> • Prepare and submit quarterly groundwater monitoring report <br /> DISCUSSION <br /> E <br /> On April 27, 2004, Gettler-Ryan Incorporated (G-R) performed 2Q2004 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 5 73 to 8 27 feet below ground surface (bgs) Groundwater elevation <br /> across the site increased an average of 0 60 feet from the previous sampling event Groundwater <br /> flow was calculated to the southwest at an approximate gradient of 0 01 to 0 03 feet per foot (ft/ft) A <br /> summary of total petroleum hydrocarbons as diesel (TPHd), total petroleum hydrocarbons as <br /> gasoline (TPHg), benzene, methyl tertiary butyl ether (MtBE) laboratory analytical data is listed <br /> below ' <br /> 1� <br /> 3 <br /> r»^ <br /> n� <br /> ' 0 <br /> I lChevron198632FOnodic Mondoang120041202004 QMR 98632 doc SECOR Intemational Incorporated <br /> r <br /> 4 <br /> 4r <br />