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KLEINFELDER <br /> File No. 20-3450-01 <br /> February 8 , 1991 <br /> Based on County requirements for a small parcel split <br /> project, we are not required to establish an on-site <br /> groundwater gradient by drilling test borings. We are <br /> providing a general estimate of the groundwater gradient <br /> based on the published map. Based on the groundwater <br /> map showing lines of equal elevation of groundwater, <br /> Plate III , we conclude that the main groundwater gradient <br /> is in roughly the north direction. <br /> This completes our scope of work at this time. Based on the above <br /> information, it is our opinion that the 2 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 a 2-1/2-acre split from a much larger 40- <br /> acre parcel. Therefore, with groundwater at approximately 33 to <br /> 37 feet deep, the likelihood of a significant change in the nitrate <br /> level of the groundwater beneath the site, due to one or two <br /> additional systems, is very remote. If additional development is <br /> planned in the area, we suggest that consideration be given to <br /> 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 /> Copyright 1991 KLeinfelder, Inc. 4 <br />