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r February 25, 2002
<br /> Job Number:LGOl-397
<br /> Page 14
<br /> Mass Balance Analysis
<br /> ` In order to perform the mass balance analysis for multiple nitrate sources, each source
<br /> and its annual water quantity and average nitrogen concentration needs to be identified and
<br /> assumptions addressed. Two separate analysis were performed; 1)using rain fall, septic system
<br /> waste water and process waste water, and 2)using only rain and septic system waste water. The
<br /> following table presents the calculations and results of the nitrate loading based on two (2)
<br /> scenarios.
<br /> t_
<br /> Table 9, Nitrogen Balance.
<br /> Sources: Deep Percolation of Rain,Septic Effluent and Process Wastewater.
<br /> Concentration Weight
<br /> Volume Volume As Nitrogen As Nitrogen
<br /> Annual Average (Gallons) (Liters) (Milligrams/Liter) (Milligrams)
<br /> Deep Pere.Rain: 6,061,067 22,941,139 0.17 3,899,994
<br /> Septic: 415,661 1,573,277 35 55,064,691
<br /> r Wastewater: 5,509,487 20,853,408 6.71 . , 139,926,370
<br /> Total(Liters): 45,367,824 Total(Milligrams): 198,891,0554,,
<br /> Result: ��1�t�0a:.� (
<br /> Milligrams/Liters= 4.38 mg/L No Denitrification
<br /> Milligrarns/Liters x(1-0.25)= 3.29 mg/L With 25%Denitrification
<br /> Table 10,Nitrogen Balance.
<br /> Sources: Deep Percolation of Rain and Septic Effluent(No Process Wastewater).
<br /> .� Concentration Weight
<br /> Volume Volume As Nitrogen As Nitrogen
<br /> Annual Average (Gallons) (Liters) (11 illiorams/Liter) (Milligrams)
<br /> Deep Perc.Rain: 6,061,067 22,941,139 0.17 3,899,994
<br /> Septic: 415,661 1,573,277 35 55,064,691
<br /> Wastewater: - - - -
<br /> Total(Liters): 24,514,415 Total(Milligrams): 58,964,685
<br /> Result:
<br /> Milligrams/Liters= 2.41 mg/L No Denitrification
<br /> r Milligrams/Liters x(1-0.25)= 1.80 mg/L With 25%Denitrification
<br /> The resulting nitrogen balance which considered rainfall, septic effluent, and process
<br /> ` waste water produced an average concentration between 4.38 to 3.29 mg/L-N depending on the
<br /> effectiveness of denitrification. A second analysis was performed which considers only deep
<br /> percolation of septic effluent and deep percolation of rain fall. The nitrogen concentration was
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