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Soil Suitability/ Nitrate Loading Study Irerracon <br /> Buddhist Temple Proposed Dormitory N Stockton, California <br /> July 11, 2019 a Terracon Project No. NA177056 <br /> Table 10. <br /> Summary of Nitrate Mass Balance Equation. <br /> Result Average Effluent Deep <br /> Leach Field <br /> Year <br /> (Nc)* Acres Daily Concentration Denitrification Percolation <br /> (mg/L- (A) Effluent (Nw) (d) of Rainfall <br /> N) (Q)(gpd) (mg/L-N) (R) (in) <br /> 2006 10.8 4.60 730 56.5 30 5.76 <br /> 2012 12.6 4.60 850 59.82 30 5.76 <br /> Septic System No.1 <br /> Existing 5 Bedroom 6.7 4.60 350 45 30 4.49 <br /> Residence <br /> Septic System No.2 <br /> Assembly Hall Daily <br /> Visitors <br /> 7 Full Moon Events <br /> 2019 April—New Year 2.9 4.60 50.4 85 30 4.49 <br /> Event <br /> 5 Full Moon Events <br /> (July,August, <br /> October, November, <br /> December) <br /> Septic System No.3 <br /> Proposed 12 11.8 4.60 840 45 30 4.49 <br /> Bedroom Dormitory <br /> Total 21.4 J <br /> Maximum contaminant level(MCL)for nitrate in drinking water is 10 mg/L-N. <br /> Based on the nitrate loading results, nitrate levels for the existing 5 bedroom residence is 6.7 <br /> mg/L-N. The assembly hall daily visitors and special events is calculated to be 2.9 mg/L-N over <br /> the long term for a combined total of 9.6 mg/L-N below the MCL of 10 mg/L-N. The proposed 12 <br /> bedroom dormitory is anticipated to further increase nitrate levels by an additional 11.8 mg/L-N <br /> for a total of 21.4 mg/L-N above the MCL. <br /> As a worst case scenario, the existing 5 bedroom residence and proposed 12 bedroom dormitory <br /> have a potential to add 10.5 mg/L-N and 16.9 mg/L-N respectively when two people are calculated <br /> per bedroom and both residences are occupied. Therefore, the site has the potential to increase <br /> nitrate levels as high as 33.3 mg/L-N. <br /> 2.3.6 Impact of Nitrate Loading to Nearby Water Sources <br /> Since the subject property is relatively flat,we do not foresee percolating effluent affecting surface <br /> water sources. <br /> Responsive ■ Resourceful ■ Reliable 19 <br />