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4.6 Maintenance Standards for Drainage Facilities <br /> The facility-specific maintenance standards contained in this section are <br /> intended to be conditions for determining if maintenance actions are <br /> required as identified through inspection. They are not intended to be <br /> measures of the facility's required condition at all times between <br /> inspections. In other words, exceedence of these conditions at any time <br /> between inspections and/or maintenance does not automatically constitute <br /> a violation of these standards. However, based upon inspection <br /> observations, the inspection and maintenance schedules shall be adjusted <br /> to minimize the length of time that a facility is in a condition that requires <br /> a maintenance action. <br /> Table 4.5.2 Maintenance Standards <br /> No. 1 —Detention Ponds <br /> Maintenance Defect Conditions When Maintenance Is Results Expected When <br /> Component Needed Maintenance Is Performed <br /> General Trash& Debris Any trash and debris which exceed 1 Trash and debris cleared from site. <br /> cubic feet per 1,000 square feet. In <br /> general,there should be no visual <br /> evidence of dumping. <br /> If less than threshold all trash and <br /> debris will be removed as part of next <br /> scheduled maintenance. <br /> Poisonous Any poisonous or nuisance No danger of poisonous vegetation <br /> Vegetation and vegetation which may constitute a where maintenance personnel or the <br /> noxious weeds hazard to maintenance personnel or public might normally be. (Coordinate <br /> the public. with local health department) <br /> Any evidence of noxious weeds as Complete eradication of noxious weeds <br /> defined by State or local regulations. may not be possible. Compliance with <br /> (Apply requirements of adopted IPM State or local eradication policies <br /> policies for the use of herbicides). required <br /> Contaminants Any evidence of oil, gasoline, ' <br /> and Pollution contaminants or other pollutants contaminant. <br /> (Coordinate removal/cleanup with Hoc cur�elte�ris <br /> t. <br /> local water quality response agency). P <br /> Rodent Holes Any evidence of rodent holes if Rodents destroyed and dam or berm <br /> facility is acting as a dam or berm, or repaired. (Coordinate with local health <br /> any evidence of water piping through department; coordinate with Ecology <br /> dam or berm via rodent holes. Dam Safety Office if pond exceeds 10 <br /> acre-feet.) <br /> Volume V—Runoff Treatment BMPs—December 2014 <br /> 4-32 <br />