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• Identified Contamination Source Evaluation <br /> 5. Two natural gas pipelines run along Regulatory oversight for the <br /> West Ripon Road approximately pipelines is provided by the Pipeline <br /> 800 feet south of the Site. (Current and Hazardous Materials Safety <br /> off-site) Administration. <br /> 6. Live Oak reviewed the San Joaquin It appears that ground water at one <br /> County Environmental Health nearby well contains levels of nitrate <br /> Department's Water Well Data in excess of the MCL. San Joaquin <br /> Table dated March 10, 2009 for County Environmental Health <br /> nearby addresses that have been Department typically requires testing <br /> tested for nitrate and for nitrate and DBCP as a condition <br /> dibromochloropropane (DBCP). of project approval; in that event, <br /> Three wells were identified at one of the on-site domestic wells will <br /> addresses within approximately be tested. <br /> 0.75 miles of the subject Site. Two <br /> of the wells had been tested for <br /> DBCP; it was detected in one of the <br /> wells, at a concentration of 0.01 <br /> µg/L. All the wells had been tested <br /> for nitrate; it was detected at <br /> • concentrations of 6.0 to 50.0 mg/L. <br /> The Maximum Contaminant Level <br /> (MCL) set by the US EPA for <br /> nitrate as NO3 is 45 mg/L. The <br /> MCL for DBCP is 0.2 µg/L. (Past <br /> off-site) <br /> 7. Joe Gonzales Trucking, 7385 W. No evidence was encountered to <br /> Ripon Rd., is included on the `suggest that this facility has <br /> Hazardous Materials, Hazardous impacted the Site. <br /> Waste Generators, and <br /> Underground Storage Tanks lists. <br /> This facility is located <br /> approximately 380 feet south of the <br /> Site. According to records <br /> reviewed, this facility maintains <br /> flammables, gasses, and motor oil. <br /> Violations related to hazardous <br /> materials storage were on file from <br /> 2010; a "return to compliance" <br /> certification was on file. The facility <br /> was listed as a small quantity <br /> • hazardous waste generator through <br /> 2014. (Current off-site) <br /> LOGE 1614 9 <br />