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February 15, 2006 <br /> NOA Project Number: E06006A <br /> i' 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 maxisrtum.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 lie"required to remove this contaminant should it occur in drinking water. <br /> 4.5 Well Water Sample Collection, Handling, and Transportation <br /> P � <br /> The water sample for nitiate was collected in a sterile plastic container, and the sample for DBCP <br /> - was collected in two sterile glass vials. The samples were then transported on ice and under chain of <br /> custody to FGL Analytical Laboratory, Stockton. <br /> 4.6 Chain of Custody <br /> -The Chain of Custody documents have been included in the appendix of this report. <br /> 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> i <br /> The Site is depicted on the Geologic Map.of the San Francisco -San Jose Quadrangle, as within a region 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 8). <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 Veritas fine sandy loath, 0-2 % slopes (Plate 9).. 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 _ Perme- Septic tank <br /> and'Map (in) mmhos/cm Reaction ability absorption <br /> Symbol pH (in/hr) fields <br /> Fi <br /> Veritas fine 0-15: Fine sandy loam;SM,SC-SM <4 7.4-8.4 2.0-6.0 Moderate: <br /> sandy loam, 15-54: Sandy loam,fine sandy loam; <4 7.4-8.4 2.0-6.0 flooding, <br /> 0-2%.slopes, SC-5M cemented <br /> 266. .54-70: 1 Cemented I pan <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> 6 <br />