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File No. 20-3698-01 kn KLEINFELDER <br /> February 16, 1993 <br /> Based on County requirements for a parcel split project such as this, we are not <br /> required to establish an on-site groundwater gradient by drilling borings. We are <br /> providing a general estimate of the groundwater gradient based on the published <br /> map. Based on the groundwater map showing lines of equal elevation of <br /> groundwater, Plate III, we conclude that the main groundwater gradient was in <br /> roughly the north to slightly northeast direction in spring 1992. <br /> We note that our scope of services did not include a detailed evaluation of the <br /> potential for the septic systems to affect the quality of groundwater. However, the <br /> project involves only one additional septic system within the approximate 40-acre <br /> site. Therefore, with roundwater at roxim ee <br /> opinion e likelihood of a significant change in the nitrate level of the groundwateL <br /> beneath the site, because of-one additional system, is remote. If additional, more- <br /> concentrate eve opment is pTaffifieT in a area, we suggest that consideration be <br /> given to completing a nitrate loading study. <br /> This completes our scope of work at this time. Based on the above information, it is our <br /> opinion that the proposed parcels are suitable for septic system use. The new septic system <br /> should be located and future wells should be constructed following County requirements. <br /> Continuous monitoring of the on-site septic systems should be maintained throughout the <br /> duration of their use. Once this report is reviewed by Environmental Health Services, we <br /> would be pleased to furnish a proposal for providing whatever additional information they may <br /> require for their evaluation. <br /> If you have any questions regarding this report and the attached information, please contact us. <br /> Respectfully submitted, <br /> KLEINFELDER, INC. <br /> Steven R. Davis, C.E.G. <br /> Engineering Geologist <br /> Ron Heinzen, G.E. <br /> Regional Manager <br /> SRD:sh <br /> Attachments <br /> cc: San Joaquin County Environmental Health/Cella Barr Associates <br /> Copyright 1993 Kleinfelder, Inc. Page 3 of 3 <br />