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On-Site Wells <br /> One well is located on the Site. Two well permits were identified at the San Joaquin <br /> County Environmental Health Department: <br /> • October 1973 permit for pump installation at well east of hay barn. <br /> • December 1981 permit for pump repair at domestic well east of hay barn. <br /> These permits have been included in Appendix 4. <br /> Water Sample <br /> Live Oak collected one water sample from the domestic well on the Site oApril 21, <br /> 2011. The sample was to be analyzed for nitrate and dibromochlorrane ( BC—P) <br /> per San Joaquin County Environmental Health Department policy. <br /> As required by the laboratory, the sample was collected in a plastic container and two <br /> glass vials for nitrate and DBCP analysis, respectively. A trip blank was also utilized. <br /> The sample was placed on ice and—transported under chain of custody to FGL <br /> Environmental, Stockton. Re fuse is of the tests are forth oc miftg. <br /> Nitrate is commonly detected in shallow ground water aquifers of the Central Valley. <br /> Application of fertilizers, livestock waste, and untreated septic tank waste can all <br /> contribute to nitrate in ground water. Nitrate is mobile and tends to accumulate in <br /> shallow ground water zones. Based on work in the Sacramento Valley from the early <br /> 1900s, it is estimated that under "natural" conditions, ground water contains nitrate at <br /> concentrations no more then about 13.5 mg/L-NO3 (3 mg/L-N). Nitrate may be <br /> increasing in areas with concentrations of 24.75 mg/L-NO3 (5.5 mg/L-N) or more (Hull, <br /> 1984). <br /> DBCP is a nematocide and soil fumigant for vegetables and grapes. It is known to <br /> cause male reproductive effects and is classified as a probable human carcinogen. <br /> :Most domestic use of DBCP was discontinued in 1977 through 1979. The US EPA set <br /> the MCL at 0.2 parts per billion (ppb) because it believes that given present technology <br /> and resources, this is the lowest level to which water systems can reasonably be <br /> required to remove this contaminant should it occur in drinking water. The Maximum <br /> Contaminant Level Goal (MCLG) for DBCP is zero. <br /> LOGE 1116 Page 4 <br />