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The results for the deep percolation at the site were 6.50 in./year for the 2.95 acre parcel. The nitrate concentration is estimated to be about 1 mg/L-N for the rain concentration. (Hantzche and Finnemore, 1992). 5.3 Description of all current on-site sources of nitrate to soil and groundwater and the contribution of nitrate load from these sources to the project site: There are no sources of nitrates on site due to the parcel being a bare lot for the last 20+ years. 5.4 Discussion of all proposed future on-site sources of nitrate to soil and groundwater and the contribution of nitrate load from these sources to the project site: The existing use for this site is an undeveloped lot. However, it has been undeveloped for the last 20+ years without significant change. The site is now proposing to begin construction of a gas station, convenience store, and a coffee shop. Accounting for 1.75 gal/person per day, based off the expected 300 customers per day plus the employees, 530 gallons/day were used for the site. The 2.95 acre parcel would not have a problem with those flows, but no major additions should be made without update to this report. The average total nitrogen concentration of domestic wastewater is about 20-85mg/L-N, although 35-45mg/L-N is a better approximation (Crites and Tchnobanglous). The value selected for this site was 40mg/L-N assuming this site shall experience a larger concentration. The site will experience a process of denitrification as the soil naturally treats surface material through natural forms. Denitrification is a process that occurs when bacteria uses oxygen in the nitrate (NO3) and release nitrogen (Na) into the atmosphere. Denitrification can be variable to the type of soils, chemical properties, moisture content and other variables. Based on the sandy loams on site and the high percolation rates, this site's soil has moderate levels of denitrification. It is expected that a site with soil of these characteristics shall have approximately about 10-15% of denitrification. The value used for this site was 15%. 5.5 Calculate mass balance of nitrogen loading considering all potential sources identified using Hanztch/Finnemore equation: Using the data mentioned within this report and the attached Soil Suitability Study, the mass balance of nitrogen loading for this site was calculated. This was done using Hanztch/Finnemore formula. Based on the Hanztch/Finnemore equation this 2.95 acre parcel would contain a Nitrate Load (Nc) of 9.80 mg/L-N when the site is generating its peak flows.