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1 <br /> • Page 4 September 16,2002 <br /> 1 <br /> QUARTERLY MONITORING WELL FINDINGS <br /> Western Oil & Spreading Inc. Acampo Plant Site - <br /> 19256 N Highway 99, Acampo, CA Site <br /> Sampling 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 ' undisturbed water was withdrawn using a clean bailer and visually examined it for any 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 for refrigeration until turned over to Sequoia <br /> Laboratories' staff June 19, 2002 under chain of custody (C of C) for analysis <br /> ' Analysis Procedure <br /> The samples were analyzed for BTEX, TPHd, and TPHg, using DHS LUFT protocol <br /> Chromatograms were requested and furnished by the laboratory with findings <br /> ' Results are presented in tabular form with sample location site map as <br /> ATTACHMENT 2, "SITE CHARACTERIZATION -SUMMARY OF LAB RESULTS" <br /> 1 <br /> 1 <br />