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Identified Contamination Source Evaluation & Recommendations <br /> 6. Two pole-mounted transformers were Transformers are of concern because the <br /> observed near the southeast corner of oil within them may contain <br /> the Site. (Current on-site) polychlorinated biphenyls (PCBs), which <br /> can contaminate soil in the event of a <br /> leak. The property owner may wish to <br /> contact the utility provider regarding the <br /> PCB content of the transformers and any <br /> recommended action. <br /> 7. Two nearby wells which have been It appears that DBCP is present at levels <br /> tested for nitrate and/or DBCP were exceeding the MCL in some groundwater <br /> identified at addresses located within in the vicinity of the Site. <br /> approximately one-half mile of the Site. <br /> Both of the wells were tested for DBCP. <br /> DBCP was not detected in one well; it <br /> was detected in the other at a <br /> concentration of 1.7 ppb (µg/L). Only <br /> one of the wells was tested for nitrate as <br /> NO3; it was detected at a concentration <br /> of 34.0 mg/L. The Maximum <br /> Contaminant Level (MCL) set by the US <br /> EPA for nitrate as NO3 is 45 mg/L; the <br /> MCL for DBCP is 0.2 pg/L. (Current <br /> and past off-site) <br /> 8. Two natural gas transmission pipelines Natural gas pipelines are considered to <br /> were identified along Woodbridge Road be more of a safety issue than a <br /> one-quarter mile north of the Site. Two contamination source. Addressing these <br /> additional natural gas transmission safety issues is beyond the scope of this <br /> pipelines were identified along Turner report. <br /> Road one-half mile south of the Site. <br /> The pipelines are operated by Pacific <br /> Gas and Electric Company and are in <br /> service. (Current off-site) <br /> 9. Agricultural irrigation infrastructure may Old concrete irrigation pipes may contain <br /> be present on the Site from past farming asbestos. If any such pipes are to be <br /> operations. (Current and past on-site) disturbed, the asbestos content should be <br /> determined, and any material found to <br /> contain asbestos should be dealt with in <br /> accordance with local, State, and Federal <br /> regulations. <br /> LOGE 1406 Page 7 <br />