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j Shaylynn Estates <br /> Page No. 2 <br /> A suiinmary of the test results is presented next: <br /> Diameter of Depth of <br /> Test No. Hole in. • Hole ft. Adi. Perc. Rate (min/in) <br /> PT-2 4.5 10.0 22 <br /> PT-3 4.5 14.5 4.1 <br /> PT-4 4.5 20.5 6.8 <br /> i PT-5 4.5 20.0 4.4 <br /> PT-6 4.5 16.0 3.1 <br /> PT-7 4.5 11.5 19 <br /> PT-9 4.5 16.0 12 <br /> PT-10 4.5 14.0 2.7 <br /> PT-11 4.5 11.0 4.7 <br /> PT-13 4.5 13.0 1.6 <br /> PT-14 4.5 16.0 6.2 <br /> p i r <br /> 1 <br /> i NITRATE LOADING STUDY <br /> I A nitrate loading study was performed by using a mass balance equation to obtain a <br /> simplified prediction of groundwater nitrate buildup from the proposed installation of septic <br /> systems. Assumptions that.were made and calculations are contained in the appendix. Due to <br /> j the cemented surface soils it was assumed that ground water recharge was from lateral movement <br /> of ground water rather them deep percolation of rainwater. Using a background level of 13 mg/1 <br /> for ground water nitrate, conservatively assuming 100 percent deep disposal of sewage effluent <br /> (dry wells), and the proposed 2.00 acre lot density, a resultant average ground water nitrate level <br /> of 14.6 mg/1 was obtained. This level is well within acceptable limits. This calculations also <br /> conservatively assumes that all effluent percolates to the ground water depth of approximately <br /> i 80 feet, which based on the soil profile encountered in the test holes, is likely not the case. <br /> I <br /> 01( rA <br /> 11 <br />