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BROWN AND <br /> C A L D W E L L <br /> December 14, 1995 <br /> Mr. Brian Cobb <br /> E-Z Serve Petroleum Marketing Company of California <br /> 2550 N Loop West, Suite 600 <br /> Houston, Texas 77292-2021 11-3003-05 <br /> Subject. Third Quarter 1995, Groundwater Monitoring Report <br /> Former E-Z Serve Station #100966 <br /> 2537 Waterloo Road, Stockton, Cahfornia <br /> Dear Mr. Cobb: <br /> Brown and Caldwell conducted the third quarter 1995, groundwater monitoring event at E-Z <br /> Serve Petroleum Marketing Company of California's (E-Z Serve) Former Station #100966, <br /> 2537 Waterloo Road, Stockton, California, on September 14, 1995. The work performed at <br /> . the subject site included collecting depth-to-groundwater measurements from eight <br /> groundwater monitoring wells, purging and sampling eight wells, and submitting the <br /> groundwater samples to CKY Inc. (CKY), an analytical laboratory located in Torrance, <br /> California and certified by the State of California Department of Health Services for analysis <br /> of hazardous materials. Field work was performed following the procedures outlined in <br /> Attachment A. <br /> Field Activities <br /> Depth-to-water measurements were collected using an oil-water interface probe and a clear <br /> acrylic bailer was used to check for the presence of free product. A minimum of three well <br /> volumes was purged from each of the monitoring wells prior to sampling. Samples were <br /> collected from each of the monitoring wells, transferred to the appropriate sampling vials, and <br /> submitted to CKY under appropriate chain-of-custody In addition, a duplicate sample was <br /> collected from well MW-1 and a field blank was prepared prior to sampling well MW-1. <br /> Samples were analyzed by CKY for total petroleum hydrocarbons as gasoline (TPHg), <br /> benzene, toluene, ethylbenzene, and xylene isomers, following Environmental Protection <br /> Agency Methods 8015 modified and 8020. <br /> HFLMNM <br /> Environmental Engineering And Coosuthng Analytical Services <br /> r•,+ <br /> P 0 Box 8045 WALNUT CREEK CA 94596 1220 <br /> 3480 BUUSKIRK AVENUE, PLEASANT HILL CA 94523 4342 <br /> (510) 937 9010 FAX (510) 937 9026 <br />