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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 />dechlormation 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 />is7. 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 />C onstni(.'tion,• St(iY'niih%f7fer {.TE'.Yleral I'ei` nit <br />Page 7 <br />