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kn KLEINFELDER File No. 20-3460-01 May 16, 1991 and Water Conservation District, Plate II, indicates the depth to groundwater in this area was approximately 90 to 95 feet in Spring 1990 . Based on County requirements for a parcel split project such as this, we are not required to establish an on-site groundwater gradient by drilling test borings. We are providing a general estimate of the groundwater gradient based on the published map. Based on the groundwater map showing lines of equal elevation of groundwater, Plate III, it appears that the site is adjacent to an area of groundwater drawdown. The main groundwater gradient appears to shift from southerly north of the site to northwesterly at the site. This completes our scope of work at this time. Based on the above information, it is our opinion that the two proposed parcels are suitable for septic system use. We note that our scope of services did not include a detailed evaluation of the potential for the septic systems to affect the quality of groundwater. However, the project involves only one additional septic system within an approximate 20-acre site. Therefore, with groundwater at approximately 97 to 100 feet deep, in our opinion the likelihood of a significant change in the nitrate level of the groundwater beneath the site, due to one additional system, is very remote. If additional development is planned in the area, we suggest that consideration be given to completing a nitrate loading study. The septic systems should be located and future wells should be constructed following County requirements. Continuous monitoring of the septic systems should be maintained throughout the duration of their use. Once this report is reviewed by the Environmental Health Services, we would be pleased to furnish a proposal for providing whatever additional information they may require for their evaluation. Copyright 1991 Kleinfelder, Inc. 3 Page 3 of 4