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- � <br /> the required detention volume of 2.803 ft3. A (]otiv restrictor has been si-r.ed to dischar�e <br /> tcom the pipe as previously noted, and is described in Table l. <br /> Tuble 1: Flow R�strictor �ischar e <br /> � Orifce# Diameter Elevation 2 yr Q 10 yr Q 100 yr Q <br /> in ft cfs cfs cfs <br /> 1 3i/32 �5.50 0.05 0.06 0.06 <br /> 2 2-27/32 59.66 0 �.15 0.28 <br /> 3 1-11/32 60.20 0 0 0.05 <br /> Total : 0.05 0.2? 039 <br /> III. Risk Assessment and Erosion Control <br /> Most of the site exhibits mild slopes, except for the eastem boundary where it slopes <br /> steeply to the natural grade along the Burlington Norihem R.O.W.. Silt fencing will bz <br /> installed along the east property line at the base of the slopes,as well as along the south <br /> property line. <br /> N. Upstream Analvsis <br /> The project site is at the top of a small rise. Therefore, there are no upstream azeas <br /> dischazging onto the site. <br /> V. Downstream Anal,�s <br /> The os�site runoff will be detained and dischazged through a runoff spreader to the east, in <br /> the same manner as prior to the development. Presently, there aze no kno�m azeas of <br /> concem; therefore, by discharging at 50%of the two yeaz at the hvo yeaz, 100% of the 10 <br /> year at the 10 year, and 100% of the 100 year at the 100 yeaz events, no dovn�stream <br /> impacts or adverse affects aze anticipated. <br /> VT. Water ualit <br /> Water quality is being provided throu�h a combination sedimentation vault and wctpond, <br /> as described in the Proposed Devefopment section of this report. <br /> VIi. Maintenance Schedule <br /> The storm water management system shall be inspected annually and cleaned as <br /> neccssarv. <br /> C��.At}�Uucum;nt,lNc«InnJ l`HJ�U1'_)ADr:�in;igc Rcpurt Joc � <br />�-' — — <br />