PCBs. Distribution and Concentration Comparison: PCBs were detected at low concentrations as four different Arochlors (1242, 1248, 1254, and 1260) in samples of leachate only (Tables 5 and 9). These Arochlor mixtures were not detected in any shallow groundwater samples or samples of surface water. This suggests that the detected PCBs are likely related to the materials in the waste management. Frequency of Detection: PCBs are generally evaluated collectively. Therefore, frequency of detection of any single arochlor is not applicable. Comparison with Water Quality Criteria: Data collected at the Site to date suggest that the PCBs are associated with the waste management unit and a comparison with water quality criteria to evaluate their inclusion as COCs is not applicable.
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Sources: Lease Agreement (Cosine Communications Inc), Lease Agreement (Cosine Communications Inc)