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Brown and Caldwell <br /> 3480 Buskirk Avenue Ei Vil ' " N,IL V E 4 L T I <br /> Pleasant Hill CA 94523-4342 PER,IIT SERVICE <br /> P 0 Box 8045 <br /> Walnut Creek CA 94596-1220 <br /> 95 J," S �� 2 <br /> (510) 937-9010 <br /> FAX (510)937-9026 <br /> January 12, 1995 <br /> Mr. Brian Cobb <br /> E-Z Serve Management Company <br /> 2550 N. Loop West, Suite 600 <br /> Houston, Texas 77292-2021 11-1567-0411 <br /> Subject: Fourth Quarter Groundwater Monitoring Report <br /> Former E-Z Serve Station #100966, <br /> 2537 Waterloo Road, Stockton, California <br /> Dear Mr Cobb: <br /> Brown and Caldwell conducted the fourth quarter groundwater monitoring event at E-Z Serve <br /> Management Company's(E-Z Serve)Former Station#100966,2537 Waterloo Road,Stockton, <br /> California, on December 8 and 9, 1994 The work performed at the subject site included <br /> collecting depth-to-groundwater measurements from eight groundwater monitoring wells, <br /> purging and sampling eight wells, and submitting the groundwater samples to SPL Inc. (SPL), <br /> an analytical laboratory located in Houston, Texas and certified by the State of California <br /> Department of Toxic Substance Control for analysis of hazardous materials. Field work was <br /> performed following the procedures outlined in Attachment A. <br /> Summary of Findings <br /> Depth-to-water measurements were collected using an oil-water interface probe. Free product <br /> was not identified in any of the monitoring wells. A minimum of three well volumes was <br /> purged from each of the momtonng wells prior to sampling. Samples were collected from <br /> each of the monitoring wells, transferred to the appropriate sampling vials, and submitted to <br /> SPL under appropriate chain-of-custody. In addition, a duplicate sample was collected from <br /> Well MW-1 and a field blank was prepared prior to sampling Well MW-1. A trip blank was - <br /> prepared by SPL and accompanied the samples during shipping. SPL reported receiving the <br /> samples at 3* Celsius. Samples were analyzed by SPL for total petroleum hydrocarbons as <br /> gasoline(TPHg),benzene,toluene,ethylbenzene,and xylene isomers,following Environmental <br /> Protection Agency Methods 8015 modified and 8020. <br /> Field data collected during the sampling event indicate groundwater elevations have decreased <br /> significantly relative to last quarter. Groundwater is flowing to the west-southwest, under an <br /> OIA2yP{L'qJ 56YYq=YxpNoo966ATH-19KWPs <br /> HPLamm <br />