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KLEINFELDER <br /> File No. 20-3478-01 <br /> May 15, 1991 <br /> Page 3 of 3 <br /> showing lines of equal elevation of groundwater, Plate III, <br /> we conclude that the main groundwater gradient is in <br /> roughly the southerly direction. <br /> This completes our scope of work at this time. Based on the above <br /> information, it is our opinion that the two proposed parcels are <br /> suitable for septic system use. We note that our scope of services <br /> did not include a detailed evaluation of the potential for the <br /> septic systems to affect the quality of groundwater. However, the <br /> project involves only one additional septic system within an <br /> approximate 2-1/2-acre site. Therefore, with groundwater at <br /> approximately 106 to 108 feet deep, in our opinion the likelihood <br /> of a significant change in the nitrate level of the groundwater <br /> beneath the site, due to one additional system, is very remote. If <br /> additional development is planned in the area, we suggest that <br /> consideration be given to completing a nitrate loading study. <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 the Environmental <br /> Health Services, we would be pleased to furnish a proposal for <br /> providing whatever additional information they may require for <br /> their evaluation. <br /> We trust this report presents the information required at this <br /> time. If you have any questions regarding this report and the <br /> attached information, please contact us. <br /> Respectfully submitted, <br /> KLEINFELDER, INC. <br /> I <br /> Steven R. Davis, C.E.G. <br /> Engineering Geologist <br /> '20N �e'Ci. `2-0 <br /> Ron Heinzen, <br /> Regional Manager <br /> SRD: sd/Attachments <br /> cc: San Joaquin County Environmental Health <br /> Copyright 1991 KLeinfelder, Inc. <br />