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TABLE 11 ANALYTE AVERAGE OF THE THREE EFFLUENT SAMPLES Ammonia Nitrogen (NH,N) 71.8 mg/L (82%of Total Nitrogen) Organic Nitrogen 15.6 mg/L(18% of Total Nitrogen) Total Nitrogen 87 mg/L Total Suspended Solids(TSS) 185 mg/L Biochemical Oxygen Demand(BODS) 158 mg/L pH 7.6 Total Alkalinity 563 mg/L 5. NITRATE-NITROGEN LOADING ESTIMATIONS AND VARIABLES The process of quantifying nitrate loading is complex with numerous variables and uncertainties. Several procedures and methods may be used for determining potential nitrate impact, including sophisticated computer modeling programs. Most of these computer programs are extremely complex and arduous, and have been unfavorably reviewed in the scientific literature. Three different equations and formulas will be used below to quantify the nitrate-nitrogen loading for the St. Bernard's Church and Multipurpose Building. These methods include the Hantzsche/ Finnemore Equation, the Crites/Tchobanoglous Formula from Small and Decentralized Wastewater Management Systems and the method presented by O. B. Kaplan in Septic Systems Handbook. The primary variables involved in the assessment or in quantifying nitrate impact to the underlying groundwater are the Total Nitrogen concentration, volume of yearly wastewater flows, extent of denitrification, and the extent of evapotranspiration. From Table 10, we find the nitrogen concentrations from the St. Patrick's Church are extremely high, and conversely, the nitrogen concentrations for the Stockton Baptist Church are extremely low,based upon comparisons with Metcalf&Eddy. The differences in nitrogen concentrations from these two Churches is inexplicable, other than the difference in the number of septic tanks at each site to provide sufficient treatment of influent. The Church of Latter-day Saints average is high in three of the seven tested constituents. Averaging all three Churches produces a Total Nitrogen concentration of 87 mg N/L as shown in Table 11. Although this can be considered a strong strength wastewater, the concentration of 87 mg N/L will be used in the equations below. The volume of wastewater flows is also difficult to predict. Based upon the history of wastewater generation from the existing St. Bernard's Church and extrapolating the future flows for the new Church as calculated on Page 13 and illustrated in Table 8, a value of 2,475 gpd will be used. Page-16- Chesney Consulting