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I <br /> 1 All discharges to surface waters shall comply with surface water quality standards as 111 <br /> 2 defined in Washington Administrative Code (WAC) Chapter 173-201A. All discharges to the <br /> 3 ground shall comply with groundwater quality standards WAC Chapter 173-200. <br /> 4 <br /> 5 The Contractor shall comply with the CSWGP when the project is covered by the CSWGP. <br /> 6 Temporary Work, at a minimum, shall include the implementation of: <br /> 7 <br /> 8 1. Sediment control measures prior to ground disturbing activities to ensure all <br /> 9 discharges from construction areas receive treatment prior to discharging from the <br /> 10 site. <br /> 11 <br /> 12 2. Flow control measures to prevent erosive flows from developing. <br /> 13 <br /> 14 3. Water management strategies and pollution prevention measures to prevent <br /> 15 contamination of waters that will be discharged to surface waters or the ground. <br /> 16 <br /> 17 4. Erosion control measures to stabilize erodible earth not being worked. <br /> 18 <br /> 19 5. Maintenance of BMPs to ensure continued compliant performance. <br /> 20 <br /> 21 6. Immediate corrective action if evidence suggests construction activity is not in <br /> 22 compliance. Evidence includes sampling data, olfactory or visual evidence such <br /> 23 as the presence of suspended sediment, turbidity, discoloration, or oil sheen in <br /> 24 discharges. <br /> 25 <br /> 26 To the degree possible, the Contractor shall coordinate this temporary Work with <br /> 27 permanent drainage and erosion control Work the Contract requires. <br /> 28 <br /> 29 Clearing, grubbing, excavation, borrow, or fill within the Right of Way shall never expose <br /> 30 more erodible earth than as listed below: <br /> 31 <br /> Western Washington Eastern Washington <br /> (West of the Cascade Mountain (East of the Cascade Mountain <br /> Crest) Crest) <br /> May 1 through 17 Acres April 1 through 17 Acres <br /> September 30 I October 31 I <br /> October 1 November 1 <br /> through April 5 Acres through March 5 Acres <br /> 30 31 <br /> 32 <br /> 33 The Engineer may increase or decrease the limits based on project conditions. <br /> 34111 <br /> 35 Erodible earth is defined as any surface where soils, grindings, or other materials may be <br /> 36 capable of being displaced and transported by rain, wind, or surface water runoff. <br /> 37 <br /> 38 Erodible earth not being worked, whether at final grade or not, shall be covered within the <br /> 39 specified time period (see the table below), using BMPs for erosion control. <br /> 40 <br /> 41 <br /> 42 <br /> City of Everett Page AM-66 Amendments <br /> Everett Downtown Streetscape Improvement March 22, 2019 <br />