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i <br />Ponds 9-P2 and 9-P3 <br />Calculated Retention Time <br />Volumes 9-P2 = 6.07 acre feet <br />9-P3 = 0.41 acre feet <br />Max. Flow ditch 9-D7 = 3.12 cfs (1,400 gpm) <br />Retention time based on full volume: <br />9-P2 = 6.07 ac. ft. (43,560 ft.3/ac. ft.) _ 3.12 f~t.3/sec. <br />60 sec./min. _ 60 min./hr. = 23.54 hrs. <br />9-P3 = 0.41 ac. ft. (43,560 ft.3/ac. ft.) 3.12 f~t.3/sec. <br />60 sec./min. _ 60 min./hr. = 1.59 hrs. <br />TOTAL 25.13 hrs. <br />