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► Standards. The shallow holes were prepared by Louie Mendez of Dillon & Murphy on April 26, 2005. On May 4, 2005 at 7:30 a.m. the 24 hour presoak period was started. The holes were filled with 12 inches of water over the gravel and at this time. Environmental Health Department was notified of the start of the test. Since two of the shallow tests failed,Neil O. Anderson &Associates (Anderson)were retained to dig deep percolation tests. Anderson dug the deep holes on May 20, 2005 and May 23, 2005. Presoaking of the holes commenced on June 2, 2005 and the tests were performed on June 3, 2005. The deep test holes were excavated to a depth of 24 feet and 21 feet respectively. The " third deep test hole was excavated to 23 feet. All holes were backfilled with 2 inches "pea gravel". A 2 inch PVC pipe with perforations at the bottom was installed into the test hole and gravel was poured in the annular space. 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 ` May 5, 2005 the four shallow test holes were dry. Six inches of water was added to the holes and the holes were deemed suitable to continue. Two of the shallow tests passed the minimum _ County requirements. On June 3, 2005, the first deep test holes were found to be intact and water was remaining in the ► holes. Four hour tests were performed. (See test results in appendix.) 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 15MIN. 2 17.14.14 MIN./IN. 3 FAIL (See results in Appendix). 4 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 Redding gravelly loam. Due ► to this classification and percolation rates, a standard septic system similar to those found on surrounding parcels would be recommended on test hole 1 and 2 lots. Engineered systems are recommended on Darcels 2 and 3. 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 tY ictal on-site -sewage disposal systems on parcels 1 and 4. These systems should be proper y desT� ign�and iX installed according to the current San Joaquin County criteria for standard septic systems. ► 4 '► c:\0466\Soil Report