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This permit indicates that sumps were installed and there apparently have been no repairs to this system. Two other permits were found in the microfiche files in the one-half mile proximity to the subject Parcel. This can be considered a low number of repairs in the study area. (§ 5.1 and 6.0) SOIL PROFILE AND PERCOLATION TESTING (§ 5.4)As noted on the USDA Soil Survey map, the on-site soils consist of Madera sandy loam, #193. Typically, this soil type is moderately well-drained, with a moderately deep hardpan.-This hardpan stratum was encountered during the shallow perc test boring, as indicated by the shallow perc test results. Madera sandy loam has rapid permeability at depths below the encountered hardpan stratum, as illustrated by the deep perc test results. (§ 5.4) The subject property is in an area designated as "Hardpan"by EHD's map denoting the various soil types and septic system requirements throughout San Joaquin County. Consequently, only leachlines and seepage pits are allowed to be installed in this area of the County. However, as — referenced above, sumps have been installed in this area. This will be further discussed in the Conclusions Section 7.0.'� (§ 5.2, 5.3, and 5.4) A Log of Boring using the Unified Soil Classification System(USCS), as observed from the 25 ft'exploratory/deep perc test boring is found in Appendix B. Generally, the soils show a clayey,silty soil on the surface to five ft, then a consistent silty sandy soil under the referenced hardpan strata down to 23 ft. At 23 ft, a poorly graded fine sand was encountered. (§ 6.1)Percolation testing was conducted in the proposed location of the leachfield, as determined on the Site Plan. The perc test locations were 55 ft from the west grope me and 210 ft from the Tiffani Lane centerline, as illustrated on the Site Plan found in"Appendix B. (§ 66.3 and 6.5) ---On December 1, 2006, 1400 hrs, one shallo p est boring of 40 inches and one deep perc test boring of 25 ft were drilled with a truck mounted drill rig. The sidewalls of the shallow boring were scored with a pry-bar and the loose material removed. Two inches of fine gravel was placed at the bottom and three-inch perforated PVC pipe was inserted in each test boring. The borings were pre-saturated on December 3, 2006 at 1000 hrs with approximately 12 inches of water. (§ 6.4) O/i1 December 4, 2006, at 0800 hrs,percolation testing commenced. There was no standing water in either boring after the 24-hour soak period, as illustrated in Table 1 below. Consequently, EHD Perc Test Procedure#2 was conducted for both tests. The last half hour of the four-hour test was witnessed by Ted Tasiopoulos, R.E.H.S. of the San Joaquin County Environmental Health Department. Perc test results reveal a failing rate of 125 minutes/inch(min/in) for the shallow test, and a rate of 4.5 min/in for the deep perc test. The maximum acceptable perc rate is 60 min/in for shallow tests and 30 min/in for deep tests. (§ 5.4 a d 6.8) The following Table illustrates the existing acreage,post soak period status and test Twuits for the respective perc test depth: LL Page -2- Chesney Consulting