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v <br /> July 21,2003 <br /> Job Number:LG03-120 <br /> Page 7 <br /> Table 5. <br /> Summary of Percolation Tests. <br /> Percolation Test No. Test Depth(ft) Percolation Rate(minutes/inch) Comment <br /> Parcel 1 (P-1) 3.00 3.97 Passed Test <br /> 2.0-acres <br /> Parcel 2(P-2) 3.00 3.62 Passed Test <br /> 2.0-acres <br /> Parcel 3(P-3) 3.13 1.67 Passed Test <br /> 2.0-acres <br /> Parcel 4(P-4) 3.00 1.81 Passed Test <br /> 2.0-acres <br /> Parcel 5(P-5) 3.00 1.77 Passed Test <br /> 2.0-acres <br /> Parcel 6(P-6) 3.00 1.70 Passed Test <br /> 70.0-acres <br /> A satisfactory percolation rate is less than or equal to 60 minutes per inch (drop)per EHD <br /> ,requirements. The percolation tests conducted on each of the six parcels were found to be <br /> satisfactory according the policy of the EHD. <br /> 7.0 NITRATE LOADING STUDY <br /> Because of the concern of nitrate leaching into ground water from new septic systems <br /> constructed on the parcels, a nitrate loading analysis was required by the EHD to measure the <br /> potential concentration of percolating effluent and rain fall over the long term. Percolating septic <br /> effluent from each parcel may impact ground water to some degree. <br /> The method utilized for the nitrate loading analysis is based on a simple mass balance formula, <br /> discussed in a published article by Hantzsche and Finnemore,'which provides a convenient and <br /> simplified method to estimate long-term ground-water nitrate impacts on an area-wide basis. <br /> Hantzsche and Finnemore found that over a long period of time,water quality in the upper <br /> saturated ground-water zone closely approximates the quality of percolating recharge waters. <br /> 6 Hantzshe N.N.,Finnemore,E.J. 1991,Predicating Ground-Water Nitrate-Nitrogen Impacts. Ground <br /> Water,Vol.30,No.4. <br /> pE Rs01 <br /> = W <br /> O � <br /> f <br /> �'tS OLS <br />