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4. Documentation in the SWPPP that the BMPs selected provide an equivalent level <br /> of pollution prevention, compared to the applicable Stormwater Management <br /> Manuals, including: <br /> a. The technical basis for the selection of all stormwater BMPs(scientific, <br /> technical studies,and/or modeling) that support the performance claims for the <br /> BMPs being selected. <br /> b. An assessment of how the selected BMP will satisfy AKART requirements and <br /> the applicable federal technology-based treatment requirements under 40 CFR <br /> part 125.3. <br /> D. SWPPP—Narrative Contents and Requirements <br /> The Permittee must include each of the 13 elements below in Special Condition <br /> S9.D.1-13 in the narrative of the SWPPP and implement them unless site <br /> conditions render the element unnecessary and the exemption from that element is <br /> clearly justified in the SWPPP. <br /> 1. Preserve Vegetation/Mark Clearing Limits <br /> a. Before beginning land-disturbing activities,including clearing and grading, <br /> clearly mark all clearing limits, sensitive areas and their buffers, and trees that <br /> are to be preserved within the construction area. <br /> b. Retain the duff layer,native topsoil, and natural vegetation in an undisturbed <br /> state to the maximum degree practicable. <br /> 2. Establish Construction Access <br /> a. Limit construction vehicle access and exit to one route, if possible. <br /> b. Stabilize access points with a pad of quarry spalls,crushed rock, or other <br /> equivalent BMPs,to minimize tracking sediment onto roads. <br /> c. Locate wheel wash or tire baths on site,if the stabilized construction entrance is <br /> not effective in preventing tracking sediment onto roads. <br /> d. If sediment is tracked off site, clean the affected roadway thoroughly at the end <br /> of each day,or more frequently as necessary(for example,during wet weather). <br /> Remove sediment from roads by shoveling, sweeping, or pickup and transport <br /> of the sediment to a controlled sediment disposal area. <br /> e. Conduct street washing only after sediment removal in accordance with Special <br /> Condition S9.D.2.d. Control street wash wastewater by pumping back on site or <br /> otherwise preventing it from discharging into systems tributary to waters of the <br /> State. <br /> 3. Control Flow Rates <br /> a. Protect properties and waterways downstream of development sites from <br /> erosion and the associated discharge of turbid waters due to increases in the <br /> Construction Stormwater General Permit <br /> Page 29 <br />