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• Identified Contamination Source Evaluation <br /> 3. Two domestic wells (one for each It appears that the existing wells and <br /> house), an irrigation well, and two septic system are currently in use. <br /> septic systems (one for each <br /> house) are located on the Site. A <br /> third septic system (for the former <br /> trailer) was destroyed <br /> approximately 20 years ago, <br /> according to Dominic DePalma. <br /> (Current and past on-site) <br /> 4. A mobile fuel tank approximately As with any property at which fuels <br /> 200 gallons in size was noted near are used and stored, the potential <br /> the irrigation well; it appears to be exists for fuel to be present in the <br /> used to power the pump. (Current nearby soil. The San Joaquin <br /> on-site) County Environmental Health <br /> Department provides regulatory <br /> oversight for fuel tanks. <br /> 5. One pole-mounted transformer was The utility provider may have <br /> noted near the southwest corner of additional information about the <br /> • the Site; it was not labeled free of PCB content of pole-mounted <br /> polychlorinated biphenyls (PCBs). transformers. <br /> (Current and past on-site) <br /> 6. Live Oak reviewed the San Joaquin It appears that ground water at <br /> County Environmental Health several nearby wells contains levels <br /> Department's Water Well Data of nitrate and DBCP in excess of the <br /> Table for nearby addresses that MCLs. San Joaquin County <br /> have been tested for nitrate and Environmental Health Department <br /> dibromochloropropane (DBCP). typically requires testing for these <br /> Six wells were identified at constituents as a condition of project <br /> addresses within approximately approval; in that event, one of the <br /> one mile of the subject Site. Four on-site domestic wells will be tested. <br /> of the wells had been tested for <br /> DBCP; it was detected in three of <br /> the wells, at concentrations of 0.06 <br /> to 1.08 µg/L. All the wells had <br /> been tested for nitrate; it was <br /> detected at concentrations of 19.6 <br /> to 135 mg/L. The Maximum <br /> Contaminant Level (MCL) set by <br /> the US EPA for nitrate as NO3 is 45 <br /> mg/L. The MCL for DBCP is 0.2 <br /> • µg/L. (Current and past off-site) <br /> LOGE 1612 8 <br />