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SMITH LUTO SHOP <br />NB JOB 91133C <br />PAGE 3 <br />a. COMPUTE THE PONDING CONTOUR FOR THE 670.5 <br />ELEVATION. THIS HAS tl SURFACE AREA OF <br />APPROXIMATELY 2,700 SF. AGAIN, DETERMII�E THE <br />PONDING CONTOUR FOR, THE 670.0 ELEVATION. THIS <br />SURFACE AREA IS APPROXiMATELY 450 SF. <br />b. COMPUTE THE VOLUME <br />1. VOLUME FROM CB (TOP 669.6) <br />' TO �LEVATION 670.0 <br />' V = B/3 [A + AZ + ,/A,Az] <br />V = 66 CF <br />2. VOLUM� FROM ELEVATION 670 TO 670.5 <br />, V = 708.7 CF <br />TOTAL CAPACITY IS 708 +66 = 775 CF <br />CONSERVATIVE SINCE PIPE AND CATCH BASIN VOLUMES WERE NOT <br />INCL'UDED. <br />THEN SET FINISH FLOOR OF BUILDING 12" ABOVE OR 671.5. <br />