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� � � ' RECEIVED <br /> MAY 21 2012 <br /> C�T1( OF ORONO <br /> PHILLIP WHIPPLE <br /> Rain Garden Calculations <br /> May 17, 2012 <br /> Proposed Rain Garden <br /> Runoff Area = 10,000 Sq. Ft. <br /> Impervious Area =3600 Sq. Ft. <br /> Rain Garden Minimum Size= 3600 Sq. Ft. x 0.77 inch runoff x 1 ft/12 inch= 232 Cu. Ft. <br /> Contour Area(Sq. Ft.) Incr.Vol.(Cu. Ft.) <br /> 950.5 30 0 <br /> 951.0 250 70 <br /> 951.5 400 162 <br /> Total 232 <br /> I� <br /> I <br /> �RONBERG�ASSOCIATF.S,ING, <br /> 445 N.WYLLOW I}R <br /> i.ONG LAh'�,IV�N 5535� <br />