SU0004247 SSNL - Laserfiche WebLink

Home Browse Search

April 29, 2005 - NOA Project Number: E05040A 4.5 Well Water Sample Collection, Handling, and Transportation The sample for nitrate was collected in a clean plastic container, the sample for DBCP was collected in two clean glass vials. The samples were then transported on ice and remanded under chain of custody to Precision Enviro-Tech, Stockton. 4.6 Chain of Custody The Chain of Custody document has been included in the appendix of this report. 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION The Site is depicted on the USGS Preliminary Geologic Map_ San Francisco - San Jose Quadrangle as within the Quaternary Riverbank Formation. Quaternary Riverbank Formation is a weathered reddish gravel, sand, and silt forming clearly recognizable alluvial terraces and fans (Plate 7). The surface and near surface sbils located at the Site are reported by the San Joaquin County Soil Survey to be composed of Alamo clay, 0-2% slopes,Madera sandy loam, 0-2% slopes and Madera-Alamo complex,leveled, 0-1% slopes (Plate 8) (USDA, 1992). Table 3 presents some selected properties of these soils: Table 3. San Joaquin County Soil Survey Selected Soil Properties of On=Site Soils. _ Soil Name Depth Unified Soil Classification Salinity Soil Pertne- Septic tank and Map (in) mmhos/cm 'Reaction ability absorption Symbol pH (in/hr) fields = Alamo clay, 0-12: Clay;CH <2 6.1 -7.8 0.06-0.2 Severe: 0-2% 12-33: Clay;CH <2 6.6-8.4 <0.06 cemented slopes, 102. 33-60: Indurated pan Madera 0-19: Sandy loam;SM <2 5.6-7.3 2.0-6.0 Severe: sandy loam, 19-23: Sandy clay loam;SC <2 6.1 —7.3 0.2-0.6 cemented 0-2% 23-29: Clay,clay loam;CL,CH,SC <2 6.6-8.4 <0.06 pan,peres slopes,193. 29-60: Indurated; <2 --- slowly. Madera 0-10: Sandy loam;SM <2 5.6-7.3 2.0-6.0 Severe: } -Alamo 10-20: Clay,clay loam; <2 6.6-8.4 <0.06 cemented complex, 20-60: Indurated <2 --- --- pan,peres leveled, slowly. 0-1% , slopes, 195. Note:The table descriptions do not necessarily reflect site-specific soil properties. - FJ 6 P Fi