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• CAM metals - STLC - EPA 6010; <br /> • Chlorinated Pesticides and PCBs - EPA 8080; <br /> • Organophosphate Pesticides - EPA 8140; and <br /> • Total Recoverable Petroleum Hydrocarbons (TRPH) - EPA 418.1. <br /> Borings for monitoring wells MW-1 and MW-4 were also used to supplement the soil <br /> investigation. Two relatively undisturbed soil samples were collected from each of the monitoring wells <br /> Jborings. Soil samples were collected from near the ground surface (0 to 6 inches bgs), and from the <br /> capillary fringe (approximately 10 feet bgs). Soil samples collected from MW-1 and MW-4 were <br /> analyzed for the constituents listed above plus the following constituents: <br /> J <br /> • Volatile Organic Compounds (VOCs) - EPA 8240; and <br /> 1 • Semi-volatile Organic Compounds (SVOCs) - EPA 8270. <br /> 7 Soil samples collected from MW-1 were also analyzed for: <br /> J <br /> • Elemental (Total) Sulphur - EPA 6010; and <br /> • Sulfates - EPA 9030. <br /> Task 3 - Groundwater Investigation <br /> This task consisted of the drilling,installing, developing,and sampling of groundwater monitoring <br /> wells. Groundwater monitoring well locations were coordinated with DBT representatives to avoid <br /> interference with planned future development of the parcels. Well locations are shown on Figure 2. One <br /> upgradient (background) groundwater monitoring well (MW-1) was located in the northeast corner of the <br /> portion of Parcel III, just south of the tracks. Groundwater monitoring wells were located downgradient <br /> of the proposed sulphur stockpile in Parcel I (MW-2), the proposed copper concentrate stockpile in Parcel <br /> II (MW-3), and the existing petroleum coke stockpile in Parcel III (MW-4). San Joaquin County well <br /> M <br /> installation permits were obtained prior to the implementation of this task. Drilling, well completion, <br /> development and sampling protocols are presented in Appendix A. <br /> Groundwater samples from MW-1 and MW-4 were analyzed for the following constituents: <br /> • CAM metals - TTLC - EPA 6010; <br /> • Chlorinated Pesticides and PCBs - EPA 608; <br /> • Organophosphate Pesticides - EPA 614; <br /> • Total Recoverable Petroleum Hydrocarbons (TRPH) - EPA 418.1; <br /> • Purgeable Halocarbons - EPA 601; <br /> 'I SAC28.013 December 20, 1991 <br /> 3 <br /> `?i:Po'18S 3. 2trl6F' <br />