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This permit indicates that sumps were installed and there apparently have beery no epairs to this � system. wo other permits were found in the microfiche files in the one-half' e proximity to the subject el. 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 am, #193. Typically, this soil type is moderately well-drained, with a moderately deep an. 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 asIardp "by EHD's map denoting the various soil types and septic system requirements throu 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 23 ft exploratory/deep perc test boring is found in Appendix B. Generally, the soils show a clayey, silty soil on the space to five ft, then a consistent silty sandy soil under the referenced hardpan strata down to 23 ft.)At 23 ff, a poorly graded fine silty sand was encountered, where the boring was terminated'fer--the percolation test. (§ 6.1) Percolation testing was conducted in the proposed location of the leachfield, as determine on the Site Schematic. The perc test locations were approximately 60 ft from the west property line and 275 ft from the Tiffani Lane centerline, and 125 feet north of the existing domestic well, as all illustrated on the Site Schematic found in Appendix B. Q 6.2, 6.3 and 6.5) On April 18, 2007, 1245 hrs-,—onehallow perc test boring of 42 inches and one eep perc test boring of 23 ft (276 inches) were�dnlled with a truck mounted drill rig. The walls 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 then pre-saturated after drilling at 1400 hrs. with approximately 12 inches of water. (§ 6.4) On April 19, 2007, at 0800 hrs, percolation testing commenced. There w.As no sit ing water in either boring after the 24-hour soak period, as illustrated in Table 1 below. Co ently, 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 83.3 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 and 6.8) The following Table illustrates the existing acreage, post soak period status and perc test results for the respective perc test depth: Page -2- Chesney Consulting