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File No. 20-3563-01� KLEINFELDER <br /> March 3 , 1992 <br /> suitable for septic system use. However, because of the high <br /> groundwater conditions (approximately 7 inches to 7 feet deep) , in <br /> order to maintain the required 5-foot separation between the bottom <br /> of leach lines and groundwater, engineered "mound-type" systems <br /> with leach lines constructed in fill pads will likely be required. <br /> We stress that the septic systems should be designed by a qualified <br /> engineer. Percolation tests are recommended in the fill pads to <br /> confirm that the soils percolate according to County requirements. <br /> Based on our experience, in our opinion the subgrade soils could be <br /> susceptible to settlement when heavy loads, such as provided by <br /> Engineered Fill pads, are placed on the surface. Therefore, prior <br /> to placement of Engineered Fill, we recommend that each <br /> construction site be evaluated individually by a qualified <br /> geotechnical engineer. <br /> The septic systems should be located and future wells should be <br /> constructed following County requirements. Continuous monitoring <br /> of the septic systems should be maintained throughout the duration <br /> of their use. Once this report is reviewed by Environmental Health <br /> Services, we would be pleased to furnish a proposal for providing <br /> whatever additional information they may require for their <br /> evaluation. <br /> This report was prepared in accordance with the generally accepted <br /> standard of practice which existed in San Joaquin County at the <br /> time the report was written. No warranty, express or implied, is <br /> made. <br /> We trust this report presents the information required at this <br /> time. If you have any questions regarding this report, please <br /> contact us. <br /> Respectfully submitted, <br /> RLEINFELDER, INC. <br /> Steven R. Davis, C.E.G. <br /> Engineering Geologist <br /> )20,.' fir"I.520 <br /> Ron Heinzen, G.E. <br /> Regional Manager <br /> SRD: sd <br /> Attachments <br /> cc: Quartaroli & Associates <br /> San Joaquin County Environmental Health <br /> Copyright 1992 Kleinfelder, Inc. Page 4 of 4 <br />