Washington State Department of Ecology

Sea-Tac Third Runway Water Quality Certification

Amended 401 water quality certification - 1.9 mb. pdf. includes cover letter and all attachments, Sept. 21, 2001.

For ease in downloading, the above file is also available in sections below:

Amended 401 water quality certification with cover letter (556 k.)
Attachment A: Contractor Statement (47 k.)
Attachment B: NRMP Plan Set Revisions (93 k.)
Attachment C: Wetland A17 image (1.1 mb.)
Attachment D: Borrow Area 3 Wetland and Swale Buffer image (47 k.)
Attachment E: Section 401 Certification Synthetic Precipitation Leaching Procedure Work Plan (106 k.)