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Generally, the underlying soils show a consistent very fine sandy silt down to the excavation depth of 12 feet. No cemented silts hardpan soil stratum was discernible. �(§ 6.1)Percolation testing was conducted in the location illustrated on the Tentative Map found in Appendix C. As referenced, the perc test location and subsequent leachfield installation for Parcel 1 is north of where the house will be built. The septic tank will be on the building pad, with the leachlines extending into the vineyard. The vineyard is under drip irrigation and is not flood irrigated; therefore, there should be no problems associated with inundation. This test location maintains sufficient distance requirements between wells,property lines, etc. The following information describes the preparation of the percolation test boring and the actual percolation testing: (§ 6.2, 6.3 and 6.5) On March 28, 2007, 1700 hrs, one shallow perc test boring of 42 inches was hand-drilled on proposed Parcel 1. No perc test was conducted on the Designated Remainder, as referenced. The test boring for Parcel 1 was drilled 10 feet to the north of the actual building pad, -._ as illustrated on the Tentative Map an . . ena arcel Viewer Map. The sidewalis of the shallow borings were scored with a pry-bar and the loose material removed. Two inches of fine gravel was placed at the bottom and a three-inch perforated PVC pipe was inserted into the test boring. The boring was pre-saturated on March 29, 2006 at 1010 hrs with 12 inches of clear water. (§6.4) On March 30, 2006, 1000 hrs, percolation testing commenced. There was no standing water after the 24-hour soak period in the perc tests boring due to the sandy-silty type soil, as illustrated in Table I below. Consequently, EHD Perc Test Procedure#2 was conducted. The last half hour of the test was witnessed by Lisa Medina, R.E.H.S. of the San Joaquin County Environmental Health Department. The maximum acceptable perc rate is 60 min/in for shallow perc tests. '-�(§ 5.4 and 6.8) The following Table illustrates the proposed Parcel number, septic system structure to be installed based on the depth of the passing perc rate and the comparatively shallow depth to groundwater,proposed acreage, post soak period status and perc test results for the respective perc test: TABLE 1 PERCOLATION TEST RESULTS AND RELATED DATA v PROPOSED PARCEL PROPOSED SHALLOW PERC TEST I POST SOAK PERC TEST POTENTIAL SEPTIC ACREAGE DEPTH PERIOD RESULTS SYSTEM STRUCTURE STATUS EXISTING WELLS Parcel 1 2.8 t Acres 42 INCHES No Standing 9.3 min/in 100 Foot Leachlines Water in Hole Per Bedroom. Existing House Pad Page -3- Chesney Consulting