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February 2,2006 NOA Project Number: E05058B No water sample was taken. 4.4 Water Sample Constituents No water well was available for testing, therefore no water sample was taken for the subject property % and no water quality information is available.The following information describes water quality information about the vicinity of the subject property and what may be expected if a well is to be installed and then tested on the Site. The presence of nitrates is not uncommon in shallow ground water aquifers in San Joaquin County and other parts of the Central Valley. Nitrate in ground water occurs as a result of the application of fertilizers,livestock waste,and untreated septic tank waste. Nitrate is mobile and often accumulates in the shallow ground water zones. In the early 1900s,natural levels of nitrate in ground water were measured in forty-three (43)wells throughout the Sacramento Valley by Bryan (1923). It was thought that ground water at that time was close to "natural" conditions. Based on the work by Bryan,it is estimated that under"natural" conditions,ground water concentration containing nitrate is no more then about 13.5 mg/L-NO3 (3 mg/L-N). Areas having 24.75 mg/L-NO3 (5.5 mg/L-N) or more are those in which nitrate concentrations may be increasing (Hull, 1984). DBCP is a nematocide and soil fumigant for vegetables and grapes. It is thought to cause health problems consisting of kidney damage,liver damage, and cancer. The use of DBCP was discontinued in 1979. The Environmental Protection Agency (EPA) set the maximum contaminant limit (MCL) at 0.2 parts per billion (ppb) because the EPA believes that given present technology and resources, this is the lowest level to which water systems can reasonably be required to remove this contaminant should it occur in drinking water. Any new water wells installed on the property should have a water quality test performed prior to drinking the water. 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION -/ The Site is de icted on the Preliminary Geologic Map of the San Francisco - San Jose Cenozoic Quadran ,as wi a region of Quaternary Fan deposits. The unit consists of gravel, sandy silt and clay late 3). The surface and near surfa ils. cated at the Site are reported by the San Joaquin County Soil Survey to be composed of the C cWwet, 0-2% slopes and the Vernalis clay loam,wet, 0-2% slopes (Plate 4) (USDA, 199 presents some selected properties o tTie soils: 5 .,04