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Various scientific methods exist to estimate nitrate-nitrogen loading. This Study will use the <br /> Han tzsche/Finnemore Formula to predict the average resultant concentration of nitrate-nitrogen in <br /> effluent recharge water. As calculated below,the property has been assessed on a total areal loading <br /> basis of 2.0 acres for the Blue Rhino facility exclusively, correlated with the 1 Sr 0 gallons per day from <br /> one uni-sex restroom. These two factors primarily dictate the average resultant concentration of <br /> nitrate-nitrogen in the recharge water,which cannot exceed 10 ppm nitrate-nitrogen(45 ppm as <br /> nitrate). The following calculations demonstrate the resultant effluent recharge water from the project <br /> will not exceed 10 ppm NO3-N, or 45 ppm NO3. <br /> NLS§3.4,3.5,3.6 PREDICTED NITRATE-NITROGEN LOADING FROM THE PROPOSED <br /> BLUE RHINO PROJECT USING THE MAXIMUM AVERAGE DAILY FLOW(ADF) OF 150 <br /> GALLONS PER DAY, SIX DAYS PER WEEK,51 WEEKS PER YEAR,AND TAKING THE <br /> PROMUT AREA OF 2.0 ACRES INTO C0NSH)ERATI0N: <br /> HANTZSCHEIFINNEMORE EQUATION <br /> INw(1 - dl +RNb <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 N/L <br /> d = Fraction(%) of nitrate-nitrogen loss due to denitrification in the soil <br /> R = Average recharge rate of rainfall -inches per yr NLS§3.2 <br /> Nb= Background nitrate-nitrogen concentration of rainfall recharge,exclusive of wastewater influences <br /> (ppm NO3-N) <br /> Values and Assumptions <br /> I= 15 l d x +.'306 work d/w=45.900 eals=total WW/yr=6.136 cu ft = 0.85 in. <br /> 2.0 Ac x 43,560 sq ft/Ac x(I ft/12 in.) <br /> Nw = 103 mg N/L: 20%reduction from the septic tank =(1-0.2)103 =82 mg N/L <br /> d = Assume 20%due to the fine-grained soil at the potential soil-effluent interface as observed in the <br /> soil chemistry results. <br /> R = 12 in/yr. <br /> Nb= Assumed to be 0.1 ppm N0;N <br /> 0.85 in/w(82.4 mg N/L) G -0.20)+ (12 in/yr x 0.1 me/L) <br /> Nr = (0.85 in/yr+ 12 in/yr) <br /> Nr = 4.45 ppm as nitrate-nitrogen(NO,-N)or 19.8 ppm as nitrate(NO,) <br /> IL 8 <br /> Chesney Consulting <br />