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10. The pesticide shall be applied according to label directions. Pesticides should be mixed, and equipment <br /> cleaned, in an area where accidental spills will not enter surface or ground waters,and will not <br /> contaminate the soil. Rinseate from equipment cleaning and/or triple-rinsing of pesticide containers <br /> should be used as product. <br /> 11. The application equipment used should be capable of immediate shutoff in the event of an emergency. <br /> 4-2.2.11 BMP S2.00 MAINTENANCE OF STORM DRAINAGE FACILITIES <br /> Without proper maintenance of stormwater facilities, sediment and other debris can quickly clog facilities, <br /> making them useless. Rehabilitation of such facilities is difficult and expensive. Polluted water and sediments <br /> removed during the cleaning operation must be properly disposed of. Stormwater treatment facilities shall be <br /> maintained according to criteria or procedures presented in Section 3-1. <br /> 4- BMP S2.10 LOCATING ILLICIT CONNECTIONS TO STORM DRAINS <br /> Illicit conn sanitaryor process wastewater drains located in a buildingthat discharge to the storm <br /> drain,rather than sewer. An allowable exception is noncontact cooling water,which may be <br /> discharged to a storm r <br /> Experience has shown that illicit con very common,even in buildings constructed as late as the <br /> 1960's. Building owners are seldom aware 'n lines are improperly connected since their sewer bills <br /> are tied to water use. <br /> Redevelopment projects shall check existing buildings for illicit conn ity can be contacted for <br /> additional information. <br /> 4-2.2.13 BMP S2.20 PRIVATE STREET AND PARKING LOT SWEEPING <br /> Private street/parking lot sweeping should be implemented for sites with high impervious cover and to improve 'J <br /> runoff quality from existing development sites. Sweeping refers to the removal of accumulated dust,dirt and <br /> debris from impervious surfaces with the use of mechanical cleaners. Sites which exhibit high levels of sediment <br /> on impervious surfaces should also implement aggressive source control measures to prevent accumulation of <br /> such sediments. <br /> While traditional street/parking lot sweeping has shown limited effectiveness at improving water quality there is <br /> evidence that it can be effective when better equipment and operating procedures are used. The most efficient <br /> types of sweepers, such as regenerative air cleaners or vacuum sweepers,should be used. • <br /> METHODS TO MAXIMIZE SWEEPING EFFICIENCY <br /> 1. Multiple passes should be made. Generally speaking,one pass can remove 50%of available solids,two <br /> passes provide 75%removal. <br /> 2. The frequency of sweeping private streets and parking areas with high pollutant loadings should be <br /> increased, particularly in industrial areas. Weekly cleaning of private streets will provide more removal <br /> efficiency; less frequent sweeping will accomplish little. <br /> 3. Vacuum or regenerative air sweepers are the most effective in removing the small particles most <br /> associated with pollutants. <br /> 4. Operators should be trained to attain maximum sweeper performance. Sweeper speed,brush adjustment <br /> and rotation rate, sweeping pattern,maneuvering around parked vehicles, interim storage and disposal <br /> methods all affect pollutant removal. <br /> • <br /> 4-2-16 <br />