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..o, <br /> March 13,2000 <br /> Job Number: LGOO-067 <br /> Page 10 <br /> a biomat filter. This will promote denitrification of the effluent in the sandy upper <br /> soils. The sand with clay layer(1.5 ft to 4.5 ft in depth) will promote moist <br /> conditions in the leach field for denitrification. The need for importation additional <br /> clay is not recommended. <br /> 2) If any large gathering or special event—exceeding the daily usage estimate—is <br /> anticipated, the use of portable chemical toilets for those events or periods is <br /> recommended. <br /> 3) The design of the septic system should follow the San Joaquin County"Sewage <br /> Standards" criteria. <br /> Based on the results of this study,we believe the soils in the proposed leach field area are <br /> satisfactory for use of an onsite septic system. Provided our recommendations are followed, we <br /> do not believe that the proposed project will negatively impact ground water quality. <br /> IX. LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the <br /> existing and proposed development, the use of the subject property, and the site conditions as <br /> they existed at the time we excavated our test hole and performed the percolation test. It was <br /> assumed that the test hole and percolation test results are representative of the subsurface <br /> conditions in the general area. <br /> Our professional services were performed, our findings obtained, and our conclusions <br /> proposed in accordance with generally accepted engineering principles and practices. This <br /> warranty is in lieu of all other warranties either expressed or implied. Test findings and <br /> statements of professional opinion do not constitute a guarantee or warranty, expressed or <br /> implied. <br /> Very truly yours, <br /> NEIL O. ANDERSON& ASSOC., INC. <br /> David J. Welch, M.Sc. Neil"- ) derso President <br /> Engineering Geologist, CEG-2151 Registered Geotechnical Engineer,No. 2245 <br /> ���iED GFO <br /> 5 <br /> J. 4ldil <br /> N <br /> No.2151 °y t <br /> CERTIFIED N 45 " roes o <br /> ENGINEERING <br /> .. N� GEOLOGIST �Q 4P �, Q <� <br /> '�oFCAtc3 ' <br /> OFC <br />