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File No. 20-3689-01 KLEINFELDER <br /> December 4, 1992 <br /> III, we conclude that the main groundwater gradient northeast of the site was in roughly <br /> the north to northeast direction in spring 1992. <br /> We note that our scope of services did not include a detailed evaluation of the potential <br /> for the septic systems to affect the quality of groundwater. However, the project <br /> involves only one or two additional septic systems within the approximate 56-acre site. <br /> Therefore, with groundwater below approximately 150 feet deep, in our opinion the <br /> likelihood of a significant change in the nitrate level of the groundwater beneath the <br /> site, because of one or two additional systems, is very remote. If additional, more- <br /> concentrated development is planned in the area, we suggest that consideration be given <br /> to completing a nitrate loading study. <br /> As requested by San Joaquin County Environmental Health in their "Conditions of <br /> Approval," we collected water samples from the domestic well that supplies water to <br /> 27545 Lammers Road (location 3 on Plate 1). The samples were delivered to FGL <br /> Environmental laboratory in Stockton for nitrate content and DBCP testing. The test <br /> results will be submitted under separate cover as soon as the results are received from <br /> the laboratory. <br /> This completes our scope of work at this time. Based on the above information, it is our opinion <br /> that the proposed parcels are suitable for septic system use. The new septic systems should be <br /> located and future wells should be constructed following County requirements. Continuous <br /> monitoring of the on-site septic systems should be maintained throughout the duration of their <br /> use. Once this report is reviewed by Environmental Health Services, we would be pleased to <br /> furnish a proposal for providing whatever additional information they may require for their <br /> evaluation. <br /> If you have any questions regarding this report and the attached information, please contact us. <br /> Respectfully submitted, <br /> KLEPa=ER, INC. <br /> Steven R. Davis, C.E.G. <br /> Engineering Geologist <br /> D #e4W a2-a.J/.�� <br /> Ron Heinzen, G.E. <br /> Regional Manager <br /> SRD:sh/md 12/92 <br /> Attachments/cc: San Joaquin County Environmental Health <br /> Copyright 1992 Kleinfelder, Inc. Page 3 of 3 p <br />