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Soil Suitability Study*** APN: 051-160-04 *** 5 Acres Parcel ***McLaughlin itefuse Equipment, Inc. 04/10/91. A representative of the McLaughlin Refuse Equipment, Inc. business stated that the existing sewage system has been functioning without problems and this would appear to be a true statement in light of the almost 32 years between applied for permits. The permit for the property listed at 11353 East Locke Road consisted of adding a 40 feet leach line with a sump of unlisted dimensions at is end. PERCOLATION TESTS: The five (5) acre subject property was tested and an E.H.D. representative observed the percolation rate determination. This subject property is shown on the attached"Site Plan". A shallow percolation rest was the only percolation test conducted and reported on in this study. A deep percolation test was neither needed nor required. On July 2 and 3, 2002, I excavated the shallow Percolation and Soil Profile test holes and the shallow percolation test hole was presoaked for conducting percolation readings on July 8, 2002. The details of the conducted percolation test are contained on the attached "Percolation Details" sheet and are summarized as follows: TEST RESULTS: Test Hole No. Percolation Rate(Min/Inch) Minimum Usable Area(Sq. Ft.) Shallow Test (Y Deep Max) or Type of Septic System 1 6.67 6,000 or pits WELL WATER ANALYSIS Well water testing and analysis for Nitrate and DBCP concentrations is the responsibility of the property owner to provide. No undue chemical concentrations were detected,bacterial or other types, in the testing of water in the needed and required repair work on the well on the property. The property owner has supplied two (2) sheets showing DBCP and Nitrate test results which is just a portion of the well water chemical concentration test results determined by the Precision Enviro- Tech Analytical Laboratory required as a part of the repair work on the well on the property that has been completed and approved by the Environmental Health Department. No Dibromochloropropane(DBCP)was detected. If you have any questions or need any additional information or details on the DBCP and Nitrate testing, contact Warren L. Snider by phone at(209) 333-4414. RECOMMENDATIONS A minimum usable disposal area of 6,000 square feet is recommended for a leach field on this five (5)acre parcel. However, the property is located in an area where historically both leach field and/or pits are permissible. The present system in use on the property is pits. ENGINEER'S STATEMENT Septic systems of the types proposed can be installed and their construction is not expected to impact groundwater or cause other hazards. Walter E. Curtis Attachments: "Site Plan", "Percolation Details" sheet,"Precision Enviro-Tech Analytical Laboratory Report"(2 Sheets) T)nnv R, gncan MnI nitahlin 1 1 Qn0 F T.nclre Rnnrl T.nrlrPfnrrl CA 95717 PhnnP• 0091 f'i't-11414 4