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April 3,2001 <br /> Job Number: LGO1-074 <br /> Page 6 <br /> alluvium, alluvial terraces, and abandoned channel ridges. The Modesto Formation consists of <br /> tan and light-gray gravely sand, silt, and clay.' <br /> The surface and near surface soils located at the proposed project location are reported to <br /> be the Acampo sandy loam (no. 10 1) and the Hollenbeck (no. 173) ( <br /> western 25 percent of the site is mapped as the Hollenbeck silty cla} Vim' y b <br /> Acampo sandy loam. The following is an excerpt of selected engine <br /> soil. <br /> b� <br /> Table 3. lJ' < t f S <br /> Selected Soil Properties of the Acampo Sandy Loam and l <br /> (San Joaquin County Soil Survey Repoi �M 1 i�j <br /> Soil Name and Depth(in) Unified Soil Salinity <br /> Map Symbol Classification mmhos/cm <br /> Acampo sandy 0-19: Sandy loam SM <2 �C / <br /> loam,0 to 2 19-47: Sandy loam,fine SM <2 — <br /> percent slopes, sandy loam,coarse sandy <br /> 101. (Approx. loam. <br /> _ the western 47-49: Indurated. --- <br /> 25%of site). 49-60: Cemented. --- --- <br /> Hollenbeck 0-10: Silty clay. CH,CL <2 <br /> silty clay,0 to 2 10-37:Clay, silty clay. CH,CL <2 <br /> percent slopes, 37-42: Silty clay loam, CL <2 ` <br /> — 173.(Approx. clay loam. <br /> the eastern 75% 42-60: Cemented --- --- 1 <br /> of site). <br /> Note: The table descriptions do not necessarily reflect site-specific soil propertie <br /> Two 10-foot deep borings were drilled in the primary and alternate septic disposal fields <br /> to characterize the subsurface conditions at each location. Several other soil borings were drilled <br /> and did not encounter suitable permeable material. Plate 1 identifies the locations where <br /> permeable soils were found and a successful percolation test was conducted. A boring log, <br /> attached in the appendix, describes the soils and the depth which an adjacent percolation test hole <br /> 6 USDA Soil Conservation Service,Soil Survey of San Joaquin County,California, Sheet 12. <br /> r�ERSO <br /> � 1 <br /> o � <br /> 'Ssoc. <br />