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6. <br /> SOILS <br /> Parcel 1 . <br /> The soils map and description from the SOIL SURVEY OF SAN JOAQUIN <br /> COUNTY, CALIFORNIA, issued October, 1992, is Jacktone Clay. <br /> Jacktone Clay is , typically, a surface layer of very dark gray and <br /> dark gray clay. The upper subsoil is dark gray and light gray clay <br /> loam. The center portion is a thin layer of light gray, strongly <br /> cemented to indurated hardpan. The lower subsoil is a yellowish <br /> brown loam. The substratum is a yellowish brown, weakly cemented <br /> hardpan. <br /> Parcel 2 . <br /> All of the parcel except for a small portion that fronts on Micke <br /> Grove Road is the same as parcel 1 . <br /> The small portion typically consists of Stockton Clay. Typically, <br /> the surface layer is dark gray clay. The upper subsoil is also dark <br /> gray clay. The lower portion is a light brownish gray and grayish <br /> brown clay loam. The substratum is a variegated dark grayish brown <br /> and dark brown, weakly to strongly cemented hardpan. <br /> CONCLUSIONS <br /> Based on the test results and the performance of the existing and <br /> other septic systems ih the area, it is my opinion that the subject <br /> parcels are suitable for use of the existing and proposed septic <br /> systems . <br /> Since the depth to groundwater is 751t, based on San Joaquin County' s <br /> semi-annual groundwater report, and the maximum depth for pits is 251 , <br /> per S . J. County ordinance, the septic systems are well above ground- <br /> water elevation. <br /> Based on the above information, the septic systems should not advers- <br /> ly affect the groundwater in the area. <br /> loduca <br />