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2. Stormwater Management Manual for Eastern Washington (most current approved <br /> edition at the time this permit was issued), for sites east of the crest of the Cascade <br /> Mountains; or <br /> 3. Revisions to the manuals listed in Special Condition S9.C.1 & 2, or other stormwater <br /> management guidance documents or manuals which provide an equivalent level of <br /> pollution prevention,that are approved by Ecology and incorporated into this permit in <br /> accordance with the permit modification requirements of WAC 173-226-230; or <br /> 4. Documentation in the SWPPP that the BMPs selected provide an equivalent level of <br /> pollution prevention, compared to the applicable stormwater management manuals, <br /> including: <br /> a. The technical basis for the selection of all stormwater BMPs (scientific,technical studies, <br /> and/or modeling)that support the performance claims for the BMPs being selected. <br /> b. An assessment of how the selected BMP will satisfy AKART requirements and the <br /> applicable federal technology-based treatment requirements under 40 CFR part 125.3. <br /> D. SWPPP—Narrative Contents and Requirements <br /> The Permittee must include each of the 13 elements below in Special Condition S9.D.1-13 in <br /> the narrative of the SWPPP and implement them unless site conditions render the element <br /> unnecessary and the exemption from that element is clearly justified in the SWPPP. <br /> 1. Preserve Vegetation/Mark Clearing Limits <br /> a. Before beginning land-disturbing activities, including clearing and grading, clearly <br /> mark all clearing limits, sensitive areas and their buffers, and trees that are to be <br /> preserved within the construction area. <br /> b. Retain the duff layer, native topsoil, and natural vegetation in an undisturbed state <br /> 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 equivalent <br /> BMPs,to minimize tracking sediment onto roads. <br /> c. Locate wheel wash or tire baths on site, if the stabilized construction entrance is not <br /> effective in preventing tracking sediment onto roads. <br /> d. If sediment is tracked off site, clean the affected roadway thoroughly at the end of <br /> each day, or more frequently as necessary(for example, during wet weather). <br /> Remove sediment from roads by shoveling, sweeping, or pickup and transport of the <br /> 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. <br /> f. Control street wash wastewater by pumping back on site or otherwise preventing it <br /> from discharging into systems tributary to waters of the State. <br /> Construction Stormwater General Permit Page 25 <br />