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At a minimum, discharges from potable water(including water line flushing), fire <br /> hydrant system flushing, and pipeline hydrostatic test water must undergo the following: <br /> dechlorination to a concentration of 0.1 parts per million(ppm) or less, and pH <br /> adjustment to within 6.5 —8.5 standard units (su), if necessary. <br /> D. Prohibited Discharges: <br /> The following discharges to waters of the State, including ground water, are prohibited. <br /> 1. Concrete wastewater. <br /> 2. Wastewater from washout and clean-up of stucco, paint, form release oils, curing <br /> compounds and other construction materials. <br /> 3. Process wastewater as defined by 40 Code of Federal Regulations (CFR) 122.2 <br /> (see Appendix A of this permit). <br /> 4. Slurry materials and waste from shaft drilling, including process wastewater from <br /> shaft drilling for construction of building,road, and bridge foundations unless <br /> managed according to Special Condition S9.D.9.j. <br /> 5. Fuels, oils, or other pollutants used in vehicle and equipment operation and <br /> maintenance. <br /> 6. Soaps or solvents used in vehicle and equipment washing. <br /> 7. Wheel wash wastewater, unless managed according to Special Condition S9.D.9. <br /> 8. Discharges from dewatering activities, including discharges from dewatering of <br /> trenches and excavations, unless managed according to Special Condition S9.D.10. <br /> E. Limits on Coverage <br /> Ecology may require any discharger to apply for and obtain coverage under an <br /> individual permit or another more specific general permit. Such alternative coverage will <br /> be required when Ecology determines that this CSWGP does not provide adequate <br /> assurance that water quality will be protected, or there is a reasonable potential for the <br /> project to cause or contribute to a violation of water quality standards. <br /> The following stormwater discharges are not covered by this permit: <br /> 1. Post-construction stormwater discharges that originate from the site after <br /> completion of construction activities and the site has undergone final stabilization. <br /> 2. Non-point source silvicultural activities such as nursery operations, site <br /> preparation,reforestation and subsequent cultural treatment,thinning,prescribed <br /> burning, pest and fire control, harvesting operations, surface drainage, or road <br /> construction and maintenance, from which there is natural runoff as excluded in 40 <br /> CFR Subpart 122. <br /> 3. Stormwater from any federal operator. <br /> Construction Stormwater General Permit <br /> Page 7 <br />