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There will be an on-site kitchen in the Bingo Parlor. It will be a requirement g q ement of the �.1 Environmental Health Department that all kitchen wastewater flows be directed into a holding Ltank to be pumped out on a periodic basis. This tank will greatly reduce the potential for septic system failure from the buildup of grease in the leachfields and seepage pits. The tank must have an alarm to prevent effluent backup. The septic system design for the Bingo Parlor will be similar to the other systems servicing the remaining portion of the Mall. There will be three - 40 foot leachlines with three - five foot t diameter, 25 feet deep seepage pits at the ends of each leachline for a total of nine pits. The total L lineal feet of leachline required is calculated as the Base Tank Capacity (BTC), added to the Average Daily Flow(ADF) of sewage for the Bingo Parlor, multiplied by the Soil Factor (SF): 1200 BTC + 3000 ADF (w/20% safety factor)=4200 gals X .250 (SF)= 1050 ft of leachline. Each pit= 110 ft of leachline X 9 pits=990 + (40 ft X 3 lines)= 1110 actual ft of leachline. The Environmental Health Department will also require the following design considerations for effluent management from the Bingo Parlor based upon the factors discussed in this report: There are to be a maximum of 50 seepage pits placed along the back of the property, or wherever feasible. These pits are to be 33 inches in diameter by 25 feet deep. The effluent distribution system should be designed to divert and pump effluent from the nine large pits to these smaller pits. Additionally, the effluent must be distributed equally among these 50 smaller pits. This diversion procedure will be important during the summer months. Trees and shrubs will be used in conjunction with these smaller seepage pits to evapotranspire effluent and consume the ammonium, and to a lesser extent the nitrate molecules found in the effluent. Nitrogen in septic tank effluent averages approximately 75 percent ammonium and 25 percent nitrogen in the organic form. A certain percentage of the 75 percent ammonium will be converted to nitrate within the soil environment. It is difficult to quantify the uptake of ammonium and nitrate molecules by landscape plants. It is known that ammonium does not accumulate in the plant and is in fact, somewhat toxic due to its interference with physiological processes. Botanical research suggests that one large eucalyptus tree may transpire one ton, or 290 gallons of water per summer day. 5 Vafley Ag*search