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` <br /> � <br /> 1 � <br /> 2. Stormwater Management Monmalfor8asbern Washington (most current approved ! <br /> | � edition at the time this permit was inxucd) for sites east of the crest of the Cascade <br /> Mountains; or <br /> \ � 3. Revisions tothe manuals listed in Special Condition S9.C.1 & 2, nr other stor/nvvater <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 /> ( � <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 /> | � <br /> including: <br /> a. The technical basis for the selection of all stormwater BMI)s (scientific,technical studies, <br /> ! � and/or modeling)that support the performance claims for the BIVIPs being selected. ' <br /> b. An assessment of how the selected BIVIP will satisfy AKART requirements and the <br /> applicable federal tech nology-based treatment requirements under 40 CFR part 125.3. 1 <br /> D. S@JPPP—NorrmthxmContmntn 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. PreserveVegetation/Mark Clearing Limits <br /> � a. Before beginning |and'd|sturb|ngootixities, including clearing and grading, clearly <br /> \ � <br /> mark all clearing limits, sensitive areas and their buffers, and trees that are tobe <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 /> | � <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 /> 8MPo,to minimize tracking sediment onto vnndo. <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 /> � <br /> Remove sediment from roads bv shoveling, sweeping,or pickup and transport nfthe \ <br /> | sediment toa controlled sediment disposal area. \ <br /> e. Conduct street washing only after sediment removal in accordance with Special � <br /> Condition S9Dd. .2. . � <br /> / | <br /> f. Control street wash wastewater by pumping back on site or otherwise preventing it ' <br /> � <br /> . from discharging into systems tributary to waters of the State. ` <br /> ` <br /> � <br />� i i Construction Smrmwater General Permit Page 25 � <br />