EXH0662024767

5808 Lake WashingtonBlvd. N,E., Suite200, .Kiddand,WA 98033-7350 425-822-8880 FAX TRANSMISSIONCOVER PAGE FAX # 425-889-8808 To: Company Name: ,,_ /_¢"'-/ Telephone #: Fax#: 9 ,-w_ 2._,_ _,_7._ PMX Project#: From: Ext. Sen_By:P_'_-- _r_,.,or-- Date: e_r z'7, (o_,c9 AR 024767 k_ Parametrix, Inc. i i 5808 Lake WashingtonBlvd. N.E., Suite200, Kirkland,WA 98033-7350 425-822-8880 FAX TRANSMISSION COVER PAGE FAX # 425-889-8808 To: Company Name: //,,_-, -/f' Telephone #: PMX Project #: From: Ext. Sent By: i(_'_- " _-'-_z_7-" Date: _- z_, t_ _ Number of Pages (Total): Comments/Message: Backup Copy Will [] Will Not [] Be Sent Via This facsimile is confidentialand may alsobe attorney-privileged.If you are not the intended recipientOrthe person responsiblefor itsdistribution,please call us collect immediatelyat (425) 82.2-8880 and returnthe odginaito us via the U.S. Postal Service. Thankyou. AR 024768 WaterQuality TalkingPoints - Copper Background A four hour_rcasonable potentialanalysis"was completedduringthe 401 negotiations last summerto determinethe e_ectivcness of BMPs to removemetals from storm water. The anAlysiSwas extremely conservative, andused a methodology that has notbeen adopted or recognized to answerquestions regardingthe quality of stormwater. The results showed that standardBMPs wouldetteetively remove all metals except copper. Sandfilters wcrcnot shown to be more cttcctive thanotherBMPs. The 40I certificationrextuiredtl_ one of 8 BMP treatmenttrain_be used, and that each requiresa sand filteror compostfilter. Issues Copper is ubiquitous in storm water runoff in developedand IlrbaniTe, d areas. Sources includeautomobile brakes and rooftops. Copper in thesUeamat background (upstream)stations frequently exceed the copper criteria. The Port has demonstrated that the qualityof storm water runoff from the airport is similar to…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]