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CC1.38 in/)E(103 mg N/L) (1 - 0.20)(10 in/yr x 0.1 mg/L) <br /> 7Nr (1.38 in/yr+ 10 in/yr) <br /> Nr Dnst ' <br /> s nitrate-nitrogen (NO3-N) or 45 ppm as nitrate (NO3) <br /> Area aused by building footprints, stormwater retention,parking, well site location, <br /> septic system location and 100%replacement area may decrease the number of on-site people. <br /> Due to these area constraints, it is most likely that a filter bed disposal held will have to be <br /> installed, --- <br /> THE MAXIMUM NUMBER OF PEOPLE e3-2T7�14 03 Acres) C SUPPORTWITHOUT EXCEEDINCURRENNITRAT <br /> CONCENTRATION Off+' 7711�P#M AS NITR <br /> I <br /> HANTZSCHEIFINNEMORE EQUATION <br /> f <br /> k IN,,,(1_- d +_R Nb <br /> Nr= (I+ R) <br /> V ues n Assum tions: <br /> f <br /> I 12 eo le aximum x 15 als/ erson/d x 365 d/ r= 60,225 gals=total WW/ = 8,052 cu ft w 2.35 in/yr <br /> 1.03 Ac x 43,560 sq ft/Ac x (1 ft/12 in) <br /> Nw= 103 mg NIL <br /> d = Assume 20% due to fine-grained soil <br /> R = 10 in/yr. <br /> Nb = Assumed to be 0.1 ppm NO3-N <br /> 2.3 5 in/3g (,103 mg NQ (1 - 0.20) + (10 in/)r x 0.1 mg/Q <br /> Nr = (2.35 in/yr+ 10 in/yr) <br /> Nr = Dppmnitrate-nitrogen(NO3-N) f701 pp)s nitrate (NO) <br /> From the May 8, 2003 Symposium"Onsite Wastewater Treatment -Nitrogen Removal,"Dr. <br /> Stuart Oakley of Chico State University states that"approximately 20%of the total nitrogen <br /> generated is removed in the septic tank."As noted above, this estimate of 20%was not used for <br /> i nitrogen reduction occurring in a septic tank so that a conservative estimate could be calculated. <br /> 12 <br /> Chesney Consulting <br />