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10 year/4$ hour Storm Runoff: <br /> See formulas for calculation of a storm drain pond ' s volume per San Joaquin <br /> County <br /> TOTAL RAINFALL RUNOFF VOLUME <br /> 3. Wash and Flush Water Volume: <br /> Wash Water Volume: <br /> = Daily gal/cow X No. Milkers X Storage X 0. 134 <br /> (days) <br /> 32 X 300 X 120 X 0. 134 = 154368 cu ft <br /> Flush Water Volume: <br /> gal/flush X flushes/day X Storage X Percent New <br /> 7. 48 (days) Water (decimal ) <br /> 1700 X 2 X 120 X 1 = 54545 cu ft <br /> 7. 48 <br /> TOTAL WASH AND FLUSH WATER VOLUME = 208913 cu ft <br /> 4. Dilution Water Volume: <br /> Desired Total Solids Content = 5 <br /> Total Solids (TS, table A) = 12. 5 <br /> ODilution Volume = Gal. of Water X Total Manure <br /> Waste (step 1 ) <br /> 7. 48 <br /> ( 11 X 79590 ) /7. 48 = 117044 cu ft <br /> OSum of steps 2 and 3 = 350859 + 208913 = 559772 cu ft <br /> Volume to Add: If 2 ? 1 , then no additional volume required <br /> If 2 2 1 then the difference <br /> is the additional volume required = 0 cu ft <br /> 5. Total Storage Volume Required equals the sum of steps 1 through 3 <br /> G. Pond Size: <br /> Average Surface Area = 59500 sq ft <br /> Average Depth = 8. 0' <br /> Therefore 59500 X 8. 0 = 476000 cu ft <br />