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C7Tablestrates that evapotranspiration exceeds precipitation, even when using higher rainfall data that exceeds normal rainfall data by 28% (10.33 in. vs. 13.18 in.). The Table also illustrates that during the months of December and January and possibly November and February, 2.21" of deep percolation potentially occurs. This data also illustrates a relatively high potential for there to be significant evapotranspiration from the primary disposal area. Calculation of Alkalinity Requirement for Nitrification The nitrate-nitrogen loading to the underlying groundwater is contingent upon the environmental factors required for nitrification to occur. These conditions include soil pore-space oxygen content, soil temperature/moisture,pH, electrical conductivity, organic matter, cation exchange capacity, and alkalinity. Alkalinity in wastewater effluent is derived from future on-site well i water, in addition to the introduction of wastes. Nitrification consumes approximately 7.1 mg of alkalinity for every mg of ammonia-nitrogen(NH4-N) oxidized. Nitrification of the average Total Nitrogen(TN) concentration of 90 mg/L, as determined on Page 6, would require: 90 mg/L NH4 N x 7.1 mg CaCO3 =639 mg/L alkalinity. The alkalinity concentration in the underlying groundwater was measured at 155 mg/L and the soil was approximately 0.1%, which is 1,000 ppm. Therefore,there is sufficient alkalinity in the soil for complete nitrification to readily proceed without the introduction of wastes. F. SURFACE WATER INFORMATION Storm water management will be on-site, flowing into the retention/infiltration basin directly north of the improvements. Percolating rainwater may provide an indeterminable water table dilution effect to percolating wastewater effluent. III. NITRATE LOADING STUDY FINDINGS A. - WASTEWATER FLOW VOLUME PROJECTIONS AND CHARACTERISTICS i Wastewater Flow Volume Projections Total fixture counts and anticipated onsite people have been..provided by the Applicant. Initial startup will require four onsite people, with the potential to increase the number to 10. This number includes office personnel, yard employees, truck drivers, and customers. It is my professional engineering opinion that wastewater flow volumes are accurately determined by the theoretical maximum use of the fixtures: If the 2 proposed toilets and 3 sinks are used 4x per hour, for a total volume of 2.0 gallons each use(1.5 gals/flush+0.5 gals hand washing): 2.0 gallons/use x 4 uses/hr x 10 hrs/day= 80 x 2 toilets= j 160 gallons/day(gpd). Although a waterless urinal is proposed by the owners, a conventional urinal flow volume is calculated in the event a waterless urinal is not installed: Page-5 - Chesney Consulting