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k" KLEINFELDER <br /> File No. 20-3418-01 <br /> November 30, 1990 <br /> gradient by drilling test borings. We are providing a <br /> general estimate of the groundwater gradient based on the <br /> published maps. Based on the groundwater map showing <br /> lines of equal elevation of groundwater, Plate A-3, we <br /> conclude that the main groundwater gradient is in roughly <br /> the southwest 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 system to affect the quality of groundwater. However, the <br /> project involves only 2 possible septic systems on a total of 80 <br /> acres. In addition, groundwater is below a depth of 150 feet in <br /> the site area. Therefore, in our opinion, the likelihood of a <br /> significant change in the nitrate level of the groundwater beneath <br /> the site, due to 2 septic systems, is very remote. If additional <br /> development is planned in the area, we suggest that consideration <br /> 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 local health <br /> district, we would be pleased to furnish a proposal for providing <br /> whatever additional information the County may require for their <br /> evaluation. <br /> Copyright 1990 Kleinfelder, Inc. 4 <br />