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Fepth d 6.5) The following information describes the preparation of the percolation test actual perc testing: On April 9, 2007, one shallow perc test boring of 42 inches in d-drilled on proposed Parcel 1. Only a shallow depth boring was drilled and pert leachlines will ultimately manage the majority of effluent flows from any future sidewalls 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 in the test boring. The test boring was then pre-saturated at 1030 hrs with 12 inches of water. (§ 6.4) On April 10, 2007, 0900 firs,percolation testing commenced for the shallow test boring. There was no standing water after the 24-hour soak period in the perc tests boring, as illustrated in Table 1 below. Consequently, EHD Perc Test Procedure#2 was conducted. The last half hour of the tests was witnessed by Ted Tasiopoulos, R.E.H.S. of the San Joaquin County Environmental Health Dep7rent. (§ 5.4 and 6.8) The following Table illustrates the proposed Parcel number,potential septic system structure based on depth of passing perc rates,proposed acreage, post soak period status and perc test results for the respective perc test depths: TABLE 1 PERCOLATION TEST RESULTS AND RELATED DATA PROPOSED PARCEL PROPOSED SHALLOW POST SOAK PERC TEST AND POTENTIAL ACREAGE PERCOLATION TEST PERIOD RESULTS SEPTIC SYSTEM STRUCTURE DEPTHS STATUS MENEM Parcel 1 2.74 Acres 42 INCHES No standing 12.5 rninhn Existing Leachlines and Water in Hole Existing Well. No Testing of Designated Remainder (§ 4.0) LOCAL GROUNDWATER AND SURFACE WATER INFORMATION (§ 4.1) The 1999 Lines of Equal Depth Map published by the San Joaquin County Flood Control illustrates the groundwater depth to be approximately 55 feet below ground surface(b.g.s.). The 1999 Lines of Equal Elevation Map illustrates the groundwater elevation and the directional flow to be in a northwest direction under the property, and then turning to a northerly direction. A Well Driller's Log exists for one of the on-site domestic wells. (§ 4.2) The underground lithology specific to the subject property consists of sand, shale, clay, and gravel. There does not appear to be significant clay strata between the surface and the static water level, which may explain the propensity for nitrate contamination of the underlying groundwater. The property is not subject to 100-year flooding. Therefore, it is highly unlikely there would be surfacing of effluent from flooded conditions, other than irrigation water. Page-3- Chesney a a-3- Chesney Consulting