EXH2060031714

PCHBPollution Control Hearings Board of the State of Washington

Dear Mr. Eglick, Mr. Stock and Ms. Grad: The purpose of this e-mail is to provide you with a response to several recent e-mail PDA requests, each of which is identified below. 1. E-mails of February 1 and February 5, 2001 Andrea Grad regarding a PDA request for documents reviewed per Chapter 173-175 WAC (Dam Safety issues): As you stated in your e-mail of February 5, 2001, you will be receiving information from Mr. Jerald LaVassar of Ecology's Dam Safety Office regarding ISW Lagoon #3. This is the only facility that has been reviewed by Ecology under Chapter 173-175 WAC. Based on our review of the Port of Seattle's project, to date, it appears that there are only two proposed stormwater facilities that may require review under Chapter 173-175 WAC. These are the 25.5 acre-foot pond associated with SDWlA and the 37.91 acre-foot pond associated with SDW1B. Ecology's Dam Safety Office has determined that the MSE wall will not require a Dam Safety permit. Ecology will recommend to the Port of Seattle that they begin consultation with the Dam Safety Office concerning the design of the two proposed stormwater facilities identified above to determine if they fall under the provisions of Chapter 173-175 WAC. Stormwater impacts related to construction of these facilities would be covered under the Port's NPDES permit. The 401 permit, if one is issued, would require the Port to obtain the necessary Dam Safety permits, if required, prior to commencement of construction of the stormwater ponds. 2.…
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