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• • Sulfates - EPA 300; and <br /> • Sulfides - EPA 376.2. <br /> 4.3.1 CAM Metals <br /> Groundwater analysis was conducted for the same 17 CAM Metals identified in Section 3.1.1. <br /> Groundwater samples collected for analysis were filtered in the field to remove particulate matter to <br /> assure that groundwater being analyzed is representative of metal concentrations that are soluble in <br /> groundwater. The regulatory criteria applied to groundwater analytical results is the DTSC Maximum <br /> Contaminant Level (MCL) (26 CCR, 64435). <br /> Only one metal was detected above the MCL in groundwater samples collected from Parcel III. <br /> 1 Arsenic was detected at concentrations of 130µg/L and 60 Ag/L in MW-1 and MW-4 respectively. <br /> Arsenic was also detected at 60 µg/L in MW-00, a duplicate sample of MW-4. The concentration <br /> A detected in MW-4 is not elevated significantly above the MCL of 50 µg/L for arsenic. However, the <br /> concentration in MW-1 is more than twice the MCL. These detections of arsenic should be confirmed <br /> by resampling. Comprehensive laboratory analytical data reports are included in Appendix B. <br /> I <br /> J <br /> • 4.3.2 Chlorinated Pesticides and PCBs <br /> br <br /> Chlorinated Pesticides and PCBs were not detected in groundwater samples collected from MW-1 <br /> Ali 1 <br /> and MW-4. Comprehensive laboratory analytical data reports are included in Appendix B. <br /> J <br /> 4.3.3 Orzanophosphate Pesticides <br /> No Organophosphate Pesticides were detected in groundwater samples collected from MW-1 and <br /> 'j MW-4. Comprehensive laboratory analytical data reports are included in Appendix B. <br /> 4.3.4 Total Recoverable Petroleum Hydrocarbons <br /> TRPH was not detected in groundwater samples collected from MW-1 and MW-4. <br /> 4.3.5 Purzeable Halocarbons <br /> Purgeable Halocarbons were not detected in groundwater samples collected from MW-1 and <br /> MW-4. Comprehensive laboratory analytical data reports are included in Appendix B. <br /> SAC29.013 December 20, 1991 <br /> 17 <br />