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Presoaking of the holes commenced on July 31, 2005 and the test was performed on August 1, 2005. The deep hole was dug to a depth of 25 respectively and filled with one inch of"pea gravel". A 2 inch pvc pipe with open ends and slots was placed in the hole. About 6 inches of"pea gravel" was placed in the annular space around the pipe. 6.4 Description of the Date,Time and Condition of the Test Hole After the 24-Hour Soak Period (Hole Still Intact,Hole Dry, Depth to Water Remaining in Hole,Etc.): On April 22,2005 the two shallow test holes were dry. Six inches of water was added to each hole. There was an adequate drop in the water level and the test was deemed suitable for completion. On August 1, 2005, the deep test hole was found to be intact and no water remained in the test hole, thus the 4 hour test was performed. (See test results below) 6.5 The Test Conformed to San Joaquin County Policy EHD 02-02 (Correct Depth,diameter, 2" gravel, 6" Water Refill, Correct Readings Recorded): The percolation tests conformed to San Joaquin County Policy EHD 02-02. 6.6 Complete Percolation Test Form(Including Readings) Was Provided With RENS Verification Signature. The Rate Was Correctly Calculated Using the Last Reading: See Appendix for Test Result Form. SHALLOW TEST HOLE PERCOLATION RATE 1 60 MINJIN. 2 Fail (See Results in Appendix) DEEP TEST HOLE PERCOLATION RATE 1 Fail (See Results in Appendix 6.7 Discussion of Any Potential Problems Predicted and/Or the Need for An Engineered or Alternative Septic System: In this area, the soils are classified as a Kingdom fine sandy loam, San Joaquin loam—thick surface, and Tokay fine sandy loam. Due to this classification and percolation rates, a standard septic system similar to those found on surrounding parcels would be recommended for parcel 1. An engineered system is recommended for parcel 2. 6.8 Discussion of Percolation Rates in Relation to the Type, Size and Location of future leach fields at the site: Based on the results of the percolation rates and the soils profile, it is Dillon&Murphy's opinion that Parcel 1 is suited for a typical on-site sewage disposal system. This system should be properly designed and installed according to the current San Joaquin County criteria for standard septic systems. The failed percolation rates for Parcel 2 will require a Engineered Septic System. See Appendix for design. Based on depth to groundwater in the area and the size of the proposed parcels, it is our opinion that the installation of any new proposed septic system, if properly installed, should not adversely affect the quality of groundwater in the area. 4 c:\0423\Soil Report