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January,3, 2006 <br /> NOA Project Number: E05164A <br /> DBCP was not detected in the water sample. DBCP is a nematocide and soil fumigant for <br /> vegetables and grapes. It is thought to cause health problems consisting of kidney damage, liver <br /> damage, and cancer. The use of DBCP was discontinued in 1979.The Environmental Protection <br /> Agency (EPA) set the maximum contaminant limit (MCL) at 0.2 parts per billion (ppb) because the <br /> EPA believes that given present technology and resources, this is the lowest level to which water <br /> systems can reasonably be required to remove this contaminant should it occur in drinking water. <br /> 4.5 Well Water Sample Collection, Handling, and Transportation <br /> The water sampl Nitrate was collected in a sterile plastic container, and the sample for DBCP <br /> was collected irk twly <br /> terile glass.vials. The samples were then transported oyn�and remained <br /> under chain of ust to Precision Enviro-Tech, Stockton. __-, <br /> 4.6 Chain of Custody <br /> V The Chain of Custody document s have been included in the.app of this report. <br /> 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the Geologic Map of the San.Francisco -San Jose Quadrangle,as within aregion of <br /> Quaternary Modesto Formation. Quaternary Modesto Formation is a unit of arkosic alluvium <br /> forming Mokelumne River terraces and alluvial fan; chiefly sand with minor gravel and silt;probably <br /> glacial outwash (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the San Joaquin County Soil Survey <br /> to be composed of the Honcut sandy loam, 0-2 % slopes (Plate 8). The following table presents <br /> some selected properties of the soils: <br /> San Joaquin County Soil Survey <br /> Selected Soil Properties of On-Site Soils. <br /> Soil Name Depth Unified Soil Classification. Salinity Soil Penne- Septic tan <br /> and Map (in) mmhos/c Reaction ability absorption <br /> Symbol m pH (in/hr) fields <br /> Honcut 0-21: Sandy loam;SM <2 6.1-7.3 2.0-6.0 Slight <br /> sandy loam, 21-60: Coarse sandy laom,sandy loam; <2 6.1-7.8 2.0-6.0 <br /> 0-2% SM <br /> slo es,'175. <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> © 6 _ <br />