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The last half hour of the tests was witnessed by David Van Dyne of the San Joaquin County Environmental Health Department. The maximum acceptable perc rate is 60 min/in for shallow perc tests. ,,/( 50 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 PERC TEST POST SOAK PERC TEST AND SEPTIC SYSTEM ACREAGE DEPTHS PERIOD RESULTS STRUCTURE STATUS Homesite Parcel 5.0 Acres 42 INCHES No Standing Leachlines Water in Hole Designated Remainder 35.37 Acres 42 INCHES No Standing Parcel Water in Hole 5.6 mil]/in Leachlines (§ 4--.0) LOCAL GROUNDWATER AND SURFACE WATER INFORMATION (§ 411)The 1999 Lines of Equal Depth Map published by the San Joaquin County Flood Control illustrates the groundwater depth to be approximately 10 feet below ground surface (bgs). As referenced, a ten-foot exploratory boring was hand-drilled in the future leachfield. Although the soil was very moist at the 10 ft depth, the zone of saturation was not encountered. Therefore, the zone of saturation is assumed to be approximately 15 bgs. The 1999 Lines of Equal Elevation Map illustrates the groundwater directional flow in a westerly direction toward the San Joaquin River. A Well Driller's Log exists for the adjacent domestic well to the north. Underground lithology consists of intervening strata of sand and clay. The property is not subject to 100-year flooding. Therefore, it is highly unlikely there would be surfacing of effluent from inundated conditions. Surface stormwater will be managed by the surrounding almond orchard. ((9 anc�4. ) One domestic well is currently on Parcel 1 that serves the Dutra residence and one ag well is on the Remainder. A new domestic well is proposed for the Chavez home. The Dutra domestic well was sampled from the hose bibb next to the east side of the pressure tank. A clear plastic bottle was used for the nitrate sample and three amber VOC bottles were used for the Dibromochloropropane (DBCP) and Ethylene Dibromide (EDB) samples. The well was allowed to cycle four times to ensure the sampling of aquifer formation water. -/(§14.6)' The samples were placed in a cooled ice chest and transported under the attached Chain of Custody to A & L Labs in Modesto, California to be analyzed for nitrate, DBCP, and EDB. Page -3- Chesney Consulting