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• 38 . Measuring, Analyzing, and Controlling <br /> Instruments ; Photographic, Medical, and <br /> Optical Goods ; Watches and Clocks <br /> • 39. Miscellaneous Manufacturing Industries <br /> Those industries described as Major Groups in the Standard <br /> Industrial Classification (SIC) Manual listed above which plan to <br /> use, store, distribute or produce hazardous substances equal to or <br /> exceeding the RQ (Reportable Quantity) threshold amounts listed in <br /> the Comprehensive Environmental Response, Compensation, and <br /> Liability Act (CERCLA) , Table 302.4 and the- Michigan Critical <br /> Materials Register shall register with the-Durham - Durham County <br /> Emergency Management Agency and Durham County Fire Marshal the. <br /> types (common and scientific names) and quantities of hazardous <br /> substances used, stored, distributed or produced, and the location <br /> and method of storage within six (6 ) months following the <br /> enactment of this ordinance and annually thereafter. An inventory <br /> of such substances shall be maintained on the premises available <br /> • , ' for inspection by the Durham County Fire Marshal and the <br /> Durham-Durham County Emergency Management Agency. <br /> d. 19't 4r or W 'ar-ioi,s Waste T]` gmoAfi'. - No facility <br /> which recycles or disposes of toxic or <br /> hazardous waste shall be located within the Water <br /> Quality 3asin Area. Such facilities are defined in <br /> NCOS 1433- 470 .2 entitled Hazardous Waste Treatment <br /> Facility and Hazardous Waste Long Term Storage <br /> Facility . <br /> E. <br /> 7-.,pr.ri r+, Cr,r are T ^+ �`r na - For the purpose of this <br /> section, an impervious surface is defined as a surface <br /> composed of any material that impedes or prevents natural <br /> infiltration of water into the soil. Impervious surface may <br /> include but are not limited to : roofs, decks, driveways, <br /> patios, sidewalks, parking areas, tennis courts, streets, <br /> any concrete, asphalt or compacted gravel surface. <br /> Calculation of impervious street coverage shall be deter- <br /> mined by the area of right-of-way between the center line of <br /> the street and the edge of a compacted surface. <br /> 1. Wa*_Pr QLai ;ry (70.4L4c�1 ,4rol - There shall be a <br /> limitation of no more than 6% of the total land <br /> area of a single development located within the <br /> boundaries of the Water Quality Critical Area which <br /> - - -4 may -be covered by an impervious surface. Roof areas <br /> of residential buildings may be excluded from the <br /> ` impervious surface calculations if roof runoff is kept <br /> from directly or indirectly entering street or <br /> parking/driveway drainage systems, but rather is <br /> directed to infiltrate the first one inch of storm <br /> water across lawn or natural vegetation areas within <br /> 5• <br /> i <br />