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Duplicate samples were collected at 10.0 feet in MW-1 and 0.5 feet in MW-4. The soil samples were <br />analyzed for the same constituents listed above, and also included: <br />Volatile Organic Compounds (VOCs) - EPA Method 8240; and <br />Semi-volatile Organic Compounds (SVOCs) - EPA 8270. <br />The soil samples collected from MW-1 were also analyzed for: <br />Elemental (Total) Sulphur - EPA Method 6010; and <br />Sulfates - EPA Method 300. <br />4.1.1 CAM Metals <br />The CAM Metals are antimony, arsenic, barium, beryllium, cadmium, cobalt, chromium, copper, <br />mercury, molybdenum, nickel, lead, selenium, silver, thallium, vanadium, and zinc. The majority of <br />the CAM Metals were analyzed by EPA Method 6010 with arsenic, mercury, selenium, and thallium <br />analyzed by alternate EPA approved methods to assure acceptable detection limits. Samples which were <br />analyzed for CAM Metals were subjected to an extraction prior to analysis. This enables a comparison <br />of reported concentrations of metals to the state of California regulatory criteria known as the Soluble <br />Threshold Limit Concentration (STLC). <br />Copper and lead were both detected at levels that exceed their respective STLC in soil samples <br />collected from Parcel III. Copper was detected above the STLC in four of 14 samples analyzed, and lead <br />in one sample. No other metals were detected at levels exceeding STLCs in Parcel III soil samples. <br />Metals detected above STLCs in Parcel HI soil samples are summarized in Table 1. Comprehensive <br />laboratory analytical data reports are included in Appendix B. <br />SAC28.013 <br />9 <br /> December 20, 1991 <br />L)A4T.-ti 11.4,:)("Pr: