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f <br /> 7 <br /> i <br /> SUMMIT tivGINEERING, INC. <br /> Consulting Civil Engineers <br /> July 23, 2001 <br /> Project No. 2001015 <br /> Page B.9 <br /> POND SIZING <br /> The retention time was selected based on evaluating the system using a first order partial mix pond <br /> model for an Average Day, Peak Harvest Month Flow of 136,190 gpd. <br /> Pond No. 1 <br /> Total Volume — 4.357 Mgal <br /> Retention Time — 4,357,000 gallons <br /> 136,190 gpd <br /> 32 days <br /> Pond No. 2 <br /> I Total Volume = 4.357 Mgal <br /> Retention Time = 4,357,000 gallons <br /> 136,190 gpd <br /> — 32 days <br /> Totals, Pond Nos. 1 and 2 <br /> N <br /> Retention Time = 32 days + 32 days = 64 days <br /> y <br /> Retention Time of 64 days <br />