EXH0653024740

PCHBPollution Control Hearings Board of the State of Washington

Ken - thisis my whole extensivecoverageof WQ in the stormwatermanagement report. Canyoueditthis to indicatethat the evaluationand recommendationofWQ bmps (and whatever else) are coveredin Appendix F - Water Quality BMP Analysis? 4.3 Water Quality Facilities Water quality treatment at new storrnwater detentionfacilities will follow Ecology's stormwater manual guidance. In general, facilities will be designedto incorporate biofiltration and permanent water quality storage to aid in the removal of suspended sedimentand contaminants. Additional water quality requirements are contained in the Port's NPDESpermit and SWPPP for Airport Operations. Althoughthe NPDES permit requires routine monitoring and reporting of water quality, it does not set discharge limitations for the stormwater system outfalls. In general, source control best management practices (BMPs) will not be proposed as part of the Master Plan stormwater management projects. Activities that can potentially contribute pollutants to stormwater runoff are typically served by the IWS, which treats all runoff at the Industrial Wastewater TreatmentPlant, and therefore there should be very few, if any, cases where stormwater source control BMPsare required for the SDS. Should they be identified, appropriate BMPswill be installed in accordance with the requirements of the SWPPP. AR 024740 EXH0653024740
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