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topography of the site is relatively flat; therefore, a proposed septic system design would not <br /> have to be altered to accommodate slopes. Both parcels are currently pasture for horses. As <br /> can be noted on the attached Tentative Parcel Map, there is a mobile home on Parcel No. 1 and <br /> a single family residence on the Designated Remainder. <br /> A review of Application Permits on file at the San Joaquin County Environmental Health <br /> Department reveals that there have been three Applications for Repairs/Additions in the one <br /> mile radius study area. These applications for system modifications were all for additional <br /> drainage to existing systems. <br /> 131 PROPOSED DEVELOPMENT OF THE SUBJECT SITE <br /> It is proposed to divide a 26 acre parcel into two parcels, Parcel No. 1 being ±11 acres and the <br /> Designated Remainder consisting of±15 acres. It is our understanding that there are no plans <br /> for any improvements to these parcels, and the current residences will be removed. <br /> [4] SOIL PROFILE AND PERCOLATION TESTING <br /> An exploratory boring performed in the center of the subject site indicates a varied soil <br /> structure throughout the soil profile. The predominate soil type from grade to 10 ft is a silty <br /> clay. The sand content of the soil increases with depth, to a fine sandy silt at boring <br /> termination. <br /> During the drilling process for the percolation test holes, the soil structure was carefully <br /> analyzed. Since both parcels are currently in pasture, the top six inch "plow layer" was heavily <br /> organic with roots. The 42 inch depth represents the maximum depth of a leachline trench <br /> where percolation (the wetting front) will occur in native soil. Therefore, perc tests were <br /> performed at this depth. The 42 inch soil profile for both parcels has a fairly heavy clay <br /> content, as evidenced by the failing percolation rates at this depth. Deep perc tests were <br /> conducted on both parcels at depths of approximately 11 ft to illustrate percolation at the <br /> bottom of sumps or shallow seepage pits. <br /> Qlity (,o"trol Inspection <br /> i.. ,. �Y <br />