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Water Sample <br /> Live Oak collected a water sample from the domestic well on October 12, 2011. The Z( 3� <br /> sample was to be analyzed for Nitrate and dibromochloropropane (DBCP) per San <br /> Joaquin County Environmental Health Department policy. LJ <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 l G� <br /> Environmental, Stockton. <br /> Nitrate was detected at a concentration(of 6.1 mg/L-NO'3 in the water sample. Nitrate is <br /> commonly detected in shallow ground water-aq­uifers of the Central Valley. Application <br /> of fertilizers, livestock waste, and untreated septic tank waste can all contribute to <br /> nitrate in ground water. Nitrate is mobile and tends to accumulate in shallow ground <br /> water zones. Based on work in the Sacramento Valley from the early 1900s, it is <br /> 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). The US EPA has set the Maximum Contaminant Level (MCL) for nitrate as NO3 <br /> at 45 mg/L. <br /> Although nitrate is a naturally-occurring compound necessary for plant growth, it can <br /> cause health problems when present at high levels in drinking water. The most <br /> common health effect of nitrates in water is methemoglobinemia or blue baby <br /> syndrome, which results in reduced oxygen supply to vital tissues. Pregnant women <br /> and certain others can also develop methemoglobinemia. Symptoms include a bluish <br /> color of the skin, as well as headache, dizziness, weakness, and difficulty breathing. <br /> Ingestion of high levels of nitrates over time can also lead to gastric problems. <br /> DBOP was not detected it.Ahe sample. DBCP is a nematocide and soil fumigant for <br /> vegefables-and-grapes. T is known to cause male reproductive effects and is classified <br /> as a probable human carcinogen. Most domestic use of DBCP was discontinued in <br /> 1977 through 1979. The US EPA set the MCL at 0.2 parts per billion (ppb, equivalent to <br /> µg/L) because it believes that given present technology and resources, this is the lowest <br /> level to which water systems can reasonably be required to remove this contaminant <br /> should it occur in drinking water. The Maximum Contaminant Level Goal (MCLG) for <br /> DBCP is zero. <br /> The laboratory analytical results are attached as Appendix 5 of this report. <br /> LOGE 1126 Page 4 <br />