Agenda - 11-28-1983 - Laserfiche WebLink

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$ 1 ARTICLE VI APPLICATION OF DIMENSIONAL REQUIREMENTS 6.23 EL:traileauirements for Protected Watershed Districts 6.23.5 Minimum Lot Size Regulated The minimum lot size for a commercial use inthe.Protected :a Watershed District shall be two (2) acres. The minimum lot size for an industrial use shall be ten (10) acres. The • minimum residential lot size shall be determined by the waste- water treatment system applicable, 6.23.6 Industrial Development Regulated To assure compatible industrial development in the Protected Watershed II (PW-II) District only light industrial uses characterized as low water users and not using, producing, storng, consuming or discharging amounts of hazardous and toxic substan as in excess of the amounts specified in the EPA listings are perm tted. No industrial uses shall be permitted in the portions of the PW-II District designated as Water Quality Critical Area. 6.23.7 Infiltration of the First k Inch of Runoff from Im.ervious Surfaces Stormwater runoff carries large amounts of oil, nutrients, meta s, bacteria and other pollutants. The quality of stormwater runof is closely associated with the /and use from which it originate-. The most significant factor is the increase of impervious surfa.es which prevent the natural infiltration of water into the soil. Most of the pollutant concentration is carried in the "first fl sh" of runoff. To control this pollutant load within the Water quality Critical Areas the first half-inch of runoff from all imperviou surfaces in new developments shall be infiltrated on-site. Developers shall be required to submit documentation which indic tea compliance with the specified standard. 6,23.8 Percentage of Undisturbed Area Regulated Soils which are seriously disturbed, even if revegetated, can generate nearly as much runoff as paved areas. Within Protected Watershed II districts at a minimum the amount of undisturbed area necessary to meet impervious surface requirements provided in 6.24.6 shall remain undisturbed during the construction process. The area to remain undisturbed shall include those portions of the lot which are most environmentally sensitive eg. highly erodible soils, steep slopes, floodplains, as well as those portions of the lot utilized for stormwater infiltration. All clearing limits chall be clearly marked and observed. However, no less that 50% of a lot used for non-residential purposes shall remain undisturbed. 6.24 Extra Requirements For Water Quality Critical Areas 6,24.1 Minimum Lot Size Regulated The minimum residential lot size in Water Quality Critical Areas .hal be two (2) acres. Commercial and industrial uses are not permitt.d. 6.24.2 Stream Ituffers Required in Water Quality Critical Areas Within the Water Quality Critical Area, an area of land along perennial and intermittent streams shall be required to remain in its natural state, unless the area is subject to serious erosi. in which case erosion resistant improvements to the vegetative cover shall be established and maintained. Perennial streams are those streams shown in solid blue on the USGS Quadrangel maps for Orange County; intermittent streams are those streams shown by broken blue lines on the same maps. , r----