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gravel was poured in the annular space. Presatuation of the first two deep percolation test holes occurred on February 24, 2005, the third hole presoak was begun on March 8, 2005. All holes were filled to 12 inches above bottoms of boring. — 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 February 11, 2005 the two shallow test holes still contained water. Six inches of water was added to the hole. There was a negligible drop in the water level and the shallow test was called off. On February 25, 2005,the first deep test holes were found to be intact and no water remained in the test hole,thus the 4 hour test was performed. (See test results below) On March 9, 2005 the third deep 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 REHS Verification Signature. The Rate Was Correctly Calculated Using the Last Reading: See Appendix for Test Result Form. DEEP TEST HOLE PERCOLATION RATE — 1 10.87 MINJIN. 2 Fail(See Results in Appendix) 3 12.5 MINJIN. 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 Montpelliar-Cometa and Redding gravelly loam. Due to this classification and percolation rates, a standard septic system similar to those found on surrounding parcels would be recommended(See Appendix). 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 the subject proposed parcels are 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. Based on the 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:\04120\Soil Report