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• • <br /> GROUND ZERO ANALYSIS, INC. <br /> 1714 Main Street <br /> Escalon,California 95320-1927 <br /> Telephone:(209)838-9888 <br /> Facsimile: (209)838-9883 <br /> 1 <br /> September 10,2008 <br /> ECE U(� fI �J <br /> �`�Iln <br /> � � <br /> Mr. James L.L.Barton SEP 1 12008 <br /> CA Regional Water Quality Control Board, <br /> Central Valley Region ENVIRONMENT HEALTH <br /> 11020 Sun Center Drive#200 PERMIT/SERVICES <br /> HEAL <br /> Rancho Cordova, CA 95670 <br /> Subject: August 2008 Status Report <br /> Gene Gabbard, Inc. 640 N. EI Dorado Street, Stockton,CA 95202 <br /> RWQCB Case No. 391005 <br /> Dear Mr. Barton: <br /> As directed in your letter of August 1, 2008, this letter summarizes site activities that occurred during the <br /> month of August 2008. <br /> FREE PRODUCT MONITORING AND GROUNDWATER SAMPLING <br /> Groundwater sampling and free product monitoring occurred on August 12, 2008. Prior to monitoring water <br /> levels in,site wells, an electronic interface probe was used the check for measurable product thickness in <br /> well MW3. None was detected. A clear bailer was then used to retrieve a sample from the top of the water <br /> column in the well and the sample was visually inspected. A slight sheen was noted by the technician <br /> Water levels were measured in wells MWl through MW7 on August 12, 2008 using an electronic water <br /> level indicator. The depth to groundwater in the wells ranged from 22.38 feet below the top of the well <br /> casing (btoc) in well MW3 to 23.40 feet btoc in well MW5. Groundwater flowed in a northeasterly <br /> direction with a average gradient of approximately 0.003 feet per foot. <br /> Wells MWI through MW4 were purged and sampled on August 12, 2008 using clean, disposable bailers. <br /> Purging was terminated at each well after physical parameters had stabilized and a minimum of three well <br /> casing volumes had been evacuated. Groundwater samples were collected from each well using a disposable <br /> bailer after the water level in the well had recovered to pre-purged levels. <br /> The water samples were decanted into the appropriate containers, placed in an ice chest cooled to a <br /> temperature of approximately 4° Centigrade and submitted to Argon Laboratory (ELAP No. 2359) under <br /> chain of custody protocol for analysis. The sample from MW3 was analyzed for TPHg, TPHd, TPHk and <br /> TPHmo using EPA Method 8015M; for BTEX by EPA Method 802111; and for fuel oxygenates and <br /> additives by EPA Method 8260B. As per EHD directive, samples from wells MW 1, MW2 and MW4 were <br /> analyzed only for TPHg, TPHmo, BTEX, oxygenates and additives since TPHd and TPHk were not detected <br /> in the sample from MW3. <br /> G:\GROUNDZEIGABBARD4eports\MON1NLY1SepR008.doc <br />