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F <br /> Assumed to be 0.1 ppm NO,-N <br /> 4.64 in/yr(81 mg N/L) (1 -0.25) + (9 in/yr x 0.1 mg/L) <br /> Nr = (4.64 in/yr+9 in/yr) <br /> Nr = 20.7 ppm as nitrate-nitrogen (NO3-N) or 92.3 ppm as nitrate(NO,) <br /> PREDICTED NITRATE-NITROGEN LOADING FROM A COMPLETELY BUILT-OUT <br /> PROJECT USING AN AVERAGE DAILY FLOW (ADF) BASED ON CURRENT AND <br /> ANTICIPATED NUMBER OF EMPLOYEES AND CUSTOMERS, AS REFERENCED ON <br /> PAGE 9: <br /> Borges Diesel Electric: 1 Employee, 2 Customers <br /> Oliveri Cabinet Shop: 5 Full-Time Employees, 2 Part-Time, 0 Customers <br /> Accurate Delivery Systems: 3 Full-Time Employees,4 Delivery People, 0 Customers <br /> Unknown Future Tenants (Projected): 3 Full Time, 3 Customers <br /> TOTAL: 23 people x 15 gal/day=345 gallons/day <br /> HANTZSCHE/FINNEMORE EO UA TION <br /> INN,(1 - d) +R Nb <br /> Nr= (I+R) <br /> Where: <br /> Nr= Resultant average concentration of nitrate-nitrogen in recharge water-(ppm NO3-N) <br /> I = Volume rate of wastewater entering the soil averaged over the gross developed area in inches per yr <br /> Nw Total nitrogen concentration of wastewater in mg NIL <br /> d = Fraction (%) of nitrate-nitrogen loss due to denitrification in the soil <br /> R = Average recharge rate of rainfall -inches per yr <br /> Nb= Background nitrate-nitrogen concentration of rainfall recharge, exclusive of wastewater <br /> influences (ppm NO3-N) <br /> Values and Assumptions <br /> 1= 345 als/d See Above x 260 work d/yj= 89,700 gals=total WW/ = 11,990 cu ft = 1.52 in. <br /> 2.17 Ac x 4 3,5 60 sq ft/Ac x 1 ft/12 in. <br /> Nw 113 mg N/L: 20%reduction from septic tank and pump chamber+ 10%removal from biomat= 81 mgN/L <br /> d = Assume 25% due to the high clay content soils <br /> R = 9 in/yr. <br /> Nb= Assumed to be 0.1 ppm NO3-N <br /> 1.52 in/yr(81 mg N/Q-(1 -0.25)+ (9 in/)r x 0.1 rung L) <br /> Nr = (1.52 in/yr+9 in/yr) <br /> Nr = 8.9 ppm as nitrate-nitrogen(NO3-N)or 39.4 ppm as nitrate(NOD <br /> 12 <br /> Chesney Consulting <br />