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Summer: Volume=30,000 gal/d(6.1 days)(1 fe/7.48 gal) =24,465 fe Surface area= (24,465 06 ft)(1 ac/43,560 ft ) = 0.10 acres Therefore, winter condition requirement of 0.22 acres control surface area design. SE. Surface loading: lb BODS/acreod = (0.03 Mgal/day)(550 mg/1)-(0.25 acres)X [(8.34 lb/Mgalo(mg/1)] = 550 lbs BODS acreoday Therefore, increase pond surface area to 0.5 acres to reduce BODS acreoday to 275 lbs. E. FACULTATIVE TREATMENT POND STORAGE VOLUME Volume (ft3)= (LWxLLxLD)-[(SxLD2)(LW+LL)]+(4xS2xLD3-3) ft3= (150ftx 150ftx6ft) - [(2x62)x (150ft+ 150ft) + (4x22 x63-3)= fe = 135,000 - 21,600+ 1152 = 114,552 fe Gals = 114,552 ft x 7.48 gaIV = 856,850 gallons rainfall =(22,500 ft2)(9.6 in total rainfall)(7.48 gal/ft ) - 12 in/ft) = 134,600 gals evaporation=(0.05 in/day)(120 days)(22,500 ft2)(7.48 gallft3) - 12 in/ft= 84,150 gals Net Gain= 50,450 gals -4 months =+12,600 gal/month during winter months. Entire Facility is in Zone B - 500 year Flood Plain per FEMA Maps. F. POND CONSTRUCTION DETAILS AND DESIGN 1. Embankments: Use of on-site material to construct embankments by excavating four feet of material to build up four feet of compacted embankment. Top width is to be ten feet for _ vehicle traffic. Inner slope to be 2:1, outer slope to be 3:1. Vegetation should be planted on the outer embankments, preferably low growing grass to prevent erosion. 2. Pond: Utilize 30 mil HDPE plastic to line entire surface area of inner side embankments and bottom. One foot overlap at each seam and glued. Four-inch overlength at bottom of embankment to account for soil compaction. Anchored at top of embankment as detailed in Appendix. No less than one foot minimum freeboard. Total depth of pond to be eight feet. Fencing, with warning signs shall be placed around the entire pond. 3. Piping: Influent and effluent lines to be generally accepted sewer line construction material. There should be two to three inspection ports on influent line leaving abattoir to the pond to check for fat, oil and grease (FOG) build-up. Build-up of FOG will require additional treatment of wastewater before entering pond. Influent lines should be place along the bottom, near the north end of the pond. A fresh water line must also be installed to maintain 5 Valfey Ag R�searck