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1 KLE/NFELOER <br /> Bn9p«pk.Xgl,t LN(rou <br /> The presence of any existing and/or potential groundwater contamination issues in the <br /> project vicinity has been discussed in our Phase I -Environmental Site Assessments <br /> dated July 6, 2006 and July 29, 2008--(Fife " nos. 67453.P01 and 95428.E01, <br /> respectively). There are several existing dairies adjacent to the property. Various <br /> above ground storage tanks containing diesel, propane and other products were located <br /> throughout the northern parcel. <br /> 8. SOIL PROFILE <br /> The subsurface soil encountered in our soil profile borings consisted of brown to dark <br /> brown, sandy silt to a depth of about 2'/z feet below site grade underlain by light- to red- <br /> brown, fine-grained silty sand with interbedded layers of sandy silt to the maximum <br /> depth explored of 15 feet. A hard pan layer was encountered at about 2'/2 feet below <br /> site grade in boring B-3. <br /> The Soil Survey of San Joaquin County, California published by the U.S. Department of <br /> Agriculture, Soil Conservation Service (1992) refers to the near-surface soil within the <br /> area of the project as belonging to the Madera sandy loam, Madera-Alamo complex and <br /> Veritas Fine Sandy Loam soil series (Map Symbols 193, 195, and 266). This soil is <br /> described as having severe to moderate percolation characteristics for septic tank_ <br /> absorption. Other attributes are given in the table below: - <br /> Map Available Water Organic Content, <br /> Soil Name Capacity, PH <br /> Symbol inches/inch percent <br /> 193 Madera sandy 0.04 - 0.17 5.6 - 8.4 <1 <br /> loam <br /> 195 Madera-Alamo 0.04 - 0.13 5.6 - 8.4 <1 <br /> complex <br /> 266 Veritas fine 0.12 - 0.15 7.4 - 8.4 1 —2 <br /> sandy loam <br /> 9. PERCOLATION TESTING <br /> The results of our percolation tests are presented below; A copy o�our field percolation <br /> test results are attached as Plates A-6 and A-7 of Appendix A. / <br /> Test Soil Test Hole Percolation Rate SJCEHD <br /> Number Description Dopt h ft. (min./inch) Observed <br /> P-1 Silty Sand 3'/3 31.3 Yes <br /> P-2 Silty Sand 3'/a 25 Yes <br /> P-3 Silty Sand 3% 10.9 Yes <br /> 95671.G01/STOSR738 August 15,2008 <br /> 0 2008 Kleinfelder Page 5 of 6 <br />