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nk � x As required by the laboratory, the sample was collected in a plastic container and two glass vials for nitrate and DBCP analysis, respectively. A trip blank was also utilized. The sample was laeed—on ice and transported under chain of custody to FGL ' Environment , SErmg/L-N63. n. Results of the test indicate nitrate was. _ e c ed at concentratio of 2DBCP was detected at a coneentrati n of 0.05µg/L. A second water sample was collected on June 15, 2010 by David Welch o ak to confirm the results o e well water sampled by the property owner. The sample was colleLe'forthcoming girding to t e same rocedure discussed above. The results of p the second test frm FGL Environmental, Stockton. Nitrrfi monly detected in shallow ground water aquifers of the Central Valley. Y Application of fertilizers, livestock waste, and untreated septic tank waste can all ` contribute to nitrate in ground water. Nitrate is mobile and tends to accumulate in shallow ground water zones. Based on work in the Sacramento Valley from the early 1900s, it is estimated that under "natural" conditions, ground water contains nitrate at concentrations no more then about 13,5 mg/L-NO3 (3 mg/L-N). Nitrate may be increasing in areas with concentrations of 24.75,mg/L-NO3 (5.5 mg/L-N) or more (Hull, 1984). DBCP is a nematocide and soil fumigant for vegetables and grapes. It is known to cause male reproductive effects and is classified as a probable human carcinogen. Most do es se of DBCP was discontinued in 1977 through 1979. The US EPA set the MCL 0.2 rts per billion (ppb--equivalent to µg/L) because it believes that given present to gy and resources, this is the lowest level to which water systems can E reasonably be required to remove this contaminant should it occur in drinking water. The Maximum Contaminant Level Goal (MCLG) for DBCP is zero. Soil Profile and Geolo is Information The Site is depicted on the San Jose geology map sheet by the California Division of Mines and Geology. The Site is depicted on a map unit of the Great Valley Fan- Deposits. The unit represents arkosic alluvium composed of clay, silt, sand, and gravel mixtures. The source is Pleistocene age glacial outwash (Plate 7). The surface and near surface soils located at the Site in the septic field are reported by the USDA Web Sail Survey to be composed of Delhi loamy sand, 0 to 2 percent slopes, Manteca fine sandy loam, 0 to 2 percent slopes, and Veritas fine sandy loam, 0 to 2 percent slopes (Plate 8) (USDA, 2009). The table below presents some selected properties of these soils: i LOGE1016 Page 4