Laserfiche WebLink
Page 4 <br /> Mr. Mcleyco <br /> March 19, 1997 <br /> cs culaticns and assurnpcions arr as follows: <br /> _ . WxN. I- ti r <br /> AW+r <br /> Where: <br /> Nc= oculated nitrate �onc-'ntratior in groundwater resulting from domestic sources and <br /> precipitation - mg/I, as lei <br /> A = number of dwelling units per acres on septic tanks {unit acre}= 1.0 <br /> W = annual wastewater loadingg per d'velIing unit.=acre ;inches] = 2.0 inches 11based on 150 <br /> gpd./residence) <br /> N.y = nitrate concentration of nitrified Jeachrield effluent (mg;1)=40 rng/I to 60 Mg/l. a N N <br /> D = percent denitrification of leachfield effluent =0,25 to 0.;0 <br /> r = annual deep percolation of precipitation (inches) = 3.0 ;nches ;based on 13.5 inches <br /> nrecipitatian. =inches runoff and 8.5 inches E7) <br /> N'b = background nitrate concentration of the deep percolat, precipitation - mg,'I =2,2 nom, <br /> as N(per Iieinfelder) <br /> Low Estimate- I <br /> N,; MVD <br /> (1.0) (2.0) +3.0 <br /> N; = <br /> 50_+6.6 = 6b.6 = 13.3 mg/I nitrate, as N <br /> +3 5 <br /> i <br /> High Estimate: <br /> N. r^� <br /> _ 0 164rn 11rt - 0.10) + 2.0) (2.2rng,l) C <br /> -x3.0 <br /> { <br /> ; <br /> f <br />