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Identified Contamination Source Evaluation & Recommendations <br /> 5 Eight pole-mounted transformers were Transformers are of concern because the <br /> observed on the Site. (Current on-site) oil within them may contain <br /> 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 /> 6. A five-gallon bucket (presumably of As part of periodic "housekeeping," waste <br /> waste oil) was observed within the oil or other waste materials and any <br /> paved, fenced portion of the Site. Minor stained soil should be removed and <br /> oil staining was observed around the appropriately disposed. Hazardous <br /> northernmost well, and two small plastic materials should be maintained in <br /> containers (presumably of oil) were accordance with all applicable laws and <br /> observed at two of the wells. (Current regulations. <br /> on-site) <br /> 7. EHD records indicate that five nearby It appears that groundwater nitrate levels <br /> wells located within approximately 1.25 vary in the vicinity of the Site, the water in <br /> miles of the Site were tested for common one well was found to exceed the MCL. <br /> contaminants. Four of the wells had DBCP is also present in one of the nearby <br /> been tested for DBCP; it was detected in wells at a level exceeding the MCL. The <br /> only one of the four at a concentration of domestic/irrigation well on the Site has <br /> 0.27 µg/L. The Maximum Contaminant been tested for nitrate and DBCP as part <br /> Level (MCL) set by the US EPA for of the Soil Suitability Study to follow this <br /> DBCP is 0.2 µg/L. Nitrate as NO3 was report. The results are pending. <br /> detected in all five wells at <br /> concentrations of 11.0 to 51.4 parts per <br /> million (ppm). The MCL for nitrate as <br /> NO3 is 45 ppm. Several cattle facilities <br /> in the vicinity could contribute to <br /> elevated nitrate levels. (Current off-site) <br /> 8. The northern property line of the Site is Surface soils near railroad tracks may <br /> defined by railroad tracks. (Current off- contain elevated levels of metals, <br /> site) herbicides, and/or pesticides. The only <br /> way to determine the presence or <br /> absence of these chemicals is by testing <br /> and analysis. Typically, any such testing <br /> is conducted at the property owner's <br /> discretion. <br /> LOGE 1225 Page 8 <br />