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c , �.,ev* v,•.. -� a*�+ r= ^ao� - New streets con- <br /> .- structed shall not require curb and gutter. New <br /> streets which cross perennial streams shall be <br /> designed in such a way to avoid direct runoff from <br /> 1 pavement surface into the stream it crosses. <br /> d. a-r Chemical Tanks - No underground <br /> fuel or chemical storage tanks shall be permitted . <br /> Spill containment measures must be taken for any <br /> fuel or chemical tank. <br /> 2 . Water Cua i tv Bast Ilea <br /> a. Starn•water Retentioq - For all new development, <br /> measures shall be employed to infiltrate or retain <br /> the first one-half (1/2) inch of stormwater runoff <br /> from impervious surfaces during a storm occurring <br /> within a twenty-four (24) hour period. <br /> 3 b . Ztr ±�� r - For all perennial streams indicated <br /> by a solid blue line on the USGS topographic maps <br /> a fifty (50) foot vegetated buffer shall be <br /> maintained on both sides of the stream bank. <br /> For all areas designated as floodplain in <br /> Unincorporated Areas of Durham County on Flood <br /> Boundary and Floodway Map by the Federal Insurance <br /> Administration of the Department of Housing and <br /> Urban Development, a fifty (50) foot vegetative <br /> buffer shall be maintained on both sides of the <br /> stream bank. <br /> Street crossings, utility lines, recreational and <br /> greenway facilities may be allowed as exceptions to <br /> the vegetative buffer requirements in perennial <br /> stream buffer areas and floodplains. <br /> • <br /> c. Street Rurofr and Dr34 ^a?t - New streets con- <br /> structed shall not require curb and gutter. New <br /> streets which cross perennial streams shall be <br /> _._. .. _ _.._....._. _... designed _in such a way to avoid direct runoff from <br /> pavement surface into the stream it crosses. - <br /> d- er "?'-,a�' c„e, or C :oil T .ks - No underground <br /> fuel or chemical storage tanks shall be permitted. <br /> - Spill containment measures must be taken for any <br /> fuel or chemical tank. <br /> • <br /> G. ,5eKer Service timitat4 !t3 - Several limitations on sewer <br /> service and wastewater treatment facilities are necessary <br /> within the Critical Watershed District in order to prevent <br /> discharges of untreated or inadequately treated wastewater <br /> . 8 <br /> • <br />