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3. BED CONFIGURATION: (less than 6% slope) <br />A. Required Bottom Area'. ft, <br />1.0 = pressurized <br />B. Select size Multiplier: 1.5 = gravity (not allowed in rapidly permeable soils) <br />Designed Bottom Area: ft, <br />Maximum width = 25 ft. (pressurized) <br />C. Select Bed Width: ft Maximum width = 12 ft. (gravity) <br />D. Calculate Bed Length: Designed Bottom Area (3.B) + Bed Width (3.C) = Length <br />ft, _ ft = ft <br />E. Select Sidewall Absorption : inches below the pipe = ft <br />F. Calculate Rock Volume:( Rock Depth (3.E) + 0.5 foot) X Adjusted Bottom Area (3.B) = ft' <br />( ft + 0.5) X ft3 <br />Calculate Volume in cubic yards : Rock volume in cubic feet (3.F) : 27 = cubic yards <br />27 �yd3 <br />[4. ORGANIC LOADING: (if pretreatment is being used) I <br />A. Organic Loading = Design Flow X Estimated BOD in mg/L in the effluent X 8.35 : 1,000,000 (See Table III) <br />X mg%L X 8.35 + 1,000,000 . = lbs BOD <br />B. Calculate System Organic -Loading: lbs. BOD (4.A) + Bottom Area (2.C) or (3.B) = lbs/day/ft" <br />ft - I I = I lbs/day/ftZ <br />Table III (7083.4030) <br />BOD Treatment BOD (mg/L) <br />Level A 15 <br />Level B 25 <br />Level C 125 <br />Cnmment— <br />I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws. <br />Michael Jungbauer r �% L3227 10/3/2011 <br />ature) (License <br />