Agenda - 11-28-1983 - Laserfiche WebLink

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w.: .,' 6,24.3 Width of Buffer Calculated ,'. The stream buffer area shall be calculated as provided in - Section 6.23,1 a) except that no maximum buffer shall be specified, 6.24,4 Distance of Structures'froM Water Supply Impoundment .. Within Water Quality Critical Areas, no structures may be constructed within 150 feet of the high water mark of the water supply impoundment, • 6,24.5 Location of Septic Tanks and Nitrification Fields Within Water Quality Critical Areas new septic tanks and their nitrification fields shall be located a minimum of 300 feet from the edge of a'water supply impoundment or perennial or intermittent stream as shown on the USGS Quadrangel maps for Orange County. 6.24.6 Impervious Surface Regulated in Protected Watersheds An impervious surface is any surface through which water cannot penetrate or can only penetrate slowly. This would include paved streets and parking lots, concrete sidewalks, and structures which cover land. As a watershed becomes developed, the amount: of impervious surface increases causing a decrease in soil absorption of stormwater and an increase in direct runoff to streams and water supply impoundments. In order to promote infiltration of stormwater runoff into the soil and minimize direct and immediate runoff into streams and water supply impoundments impervious surface ratios shall be required as provided in Section 6.23.4. . . 6.24.7 Percentage of UndistUrbed Area Regulated Soils which are seriously disturbed, even if revegetated, can generate nearly as much runoff as paved areas. Within Water Quality Critical Areas at a minimum the amount of undisturbed area necessary to meet impervious surface requirement provided in 6.24.6 shall remain undisturbed during the construction prone s. The area to remain undisturbed shall include portions of the lot which are most environmentally sensitive as well as those portio,: of the lot utilized for stormwater infiltration. All clearing limits shall be clearly marked and observed. 6.24.8 - Infiltration Of:the Fitst 15 Incll'ofROtoff from In.ervious Surfa.es Stormwater runoff carries large amounts of oil, nutrients, metal:, bacteria and other pollutants. The 'quality of stormwater runoff is closely associated to the land use from which it originates. The most significant factor is the increase of impervious surfac.s which prevent the natural infiltration of water into the soil. Most of the pollutant concentration is carried in the "first fludi" of runoff. To control this pollutant load within the Water Qual ty Critical Areas the first half-inch of runoff from all imperviousl surfaces in new developments shall be infiltrated on-site. Developers shall be required to submit documentation which indicdtes compliance of the proposed development with the specific standar . 1