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• Page 4 December 15, 2002 <br /> QUARTERLY MONITORING WELL FINDINGS <br /> Western Oil & Spreading Inc. Acampo Plant Site - <br /> 19256 N Highway 99, Acampo, CA Site <br /> Sampling lin Procedure <br /> On June 19, 2002, Don Light of Del-Tech Geotechnical Services (DelTech) sampled <br /> WOS Monitoring Wells Nos 1 through 6 He removed the cover and the secured <br /> expansive plug from the enclosed 2 IN PVC casing After a small portion of the <br /> undisturbed water was withdrawn using a clean bailer and visually examined it for any <br /> free phase product Depth to water surface was measured with an indexed tape and <br /> probe The depth to water surface from the north edge of the top of the PVC well <br /> casing (TOC) and recorded <br /> The well casing was purged using a dedicated Waterra Inertia Pump with a clear PE <br /> tube with a ball foot valve evacuating six volumes of the casing A grab sample from <br /> the bailing tube was measured periodically for pH, EC, temperature, O R P and <br /> Dissolved Oxygen as well as visual characteristics noted Following sampling the <br /> Waterra sample tube was left in place in the well casing The well cap was replaced <br /> secured and the well left to recover Reference ATTACHMENT 6, GROUNDWATER <br /> SAMPLING FORMS <br /> Later after well recovery sufficient sample to fill one each labeled quart amber glass <br /> bottle and two each labeled 40 ml VOA glass bottles was collected using the Waterra <br /> system VOA bottles were checked for trapped air All bottles were placed in an iced <br /> cooler and transferred to my office and delivered to Sequoia Laboratories' staff under <br /> chain of custody (C of C) for analysis <br /> Analysis Procedure <br /> The samples were analyzed for BTEX, TPHd, and TPHg, using DHS LOFT protocol <br /> The procedure is to be repeated quarterly at least through March 2003 <br /> Following the June 2002 collection of samples, chromatograms were not requested as <br /> they had been earlier Information is available from laboratory at additional cost if <br /> necessary <br /> Results are presented in tabular form with sample location site map as <br /> ATTACHMENT 2, "SITE CHARACTERIZATION -SUMMARY OF LAB RESULTS" <br /> i <br />