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02 December 1998 AGE-NC Project No. 98-0463 Page 4 of 5 diameter PVC casing with 0.020-inch slots into the boring. A ground water sample was collected utilizing a new, clean disposable bailer. Upon retrieval, the sample was transferred into a one-liter amber glass container. The sample was shipped in a chilled container under chain-of-custody to Sequoia Analytical Laboratory(SAL)a DHS-certified analytical laboratory for the required analysis. Sampling equipment was washed in an Alconox solution and rinsed with water prior to each sampling run to avoid cross-contamination.Each boring was completely backfilled with neat cement. 5.0. RESULTS Ground water was encountered in each probe boring at a depth of approximately 16.5 feet bsg. The only metals detected in the five grab ground water samples, at concentrations exceeding the method detection limits, were barium at 0.21 parts per million (ppm, reported as milligrams per liter), chromium (0.031 ppm), and molybdenum (0.075 ppm). These concentrations were the maximum metals concentrations detected. The maximum concentrations of barium and chromium detected do not exceed the Maximum Contaminant Levels(MCLs) set by the state of California for drinking water. An MCL for molybdenum has not been established. Two water samples(P2-H20 and P3-H20)were analyzed for chlorinated pesticides and PCBs.None were detected in the two water samples. One water sample (P2')was analyzed for semi-volatile organic compounds.No semi-volatile organic compounds were detected in the sample analyzed.The laboratory reports,QA/QC documentation and chain-of-custody forms are attached. Please note that the laboratory report erroneously listed sample P1 as `El'. 6.0. DISCUSSION/CONCLUSIONS As all water samples were analyzed for dissolved metals, the data indicates that the subject properties have not been adversely impacted by dissolved metals originating from the former magnesium plant, Steelgard's surface impoundment or from Lague Sales. The lack of detectable concentrations of chlorinated pesticides or PCBs in samples P2-H20 and P3- H20 indicates that these compounds are not likely to have impacted the subject properties from the Lague Sales site and probably have not been impacted from the former magnesium plant. The lack of detectable concentrations of semi-volatile organics in sample PT indicates that these compounds are not likely to have impacted the subject properties from the Lague Sales site. These data indicate that the subject properties have not been significantly adversely impacted by the Advanced GeoEnvironmental,Inc.