TagACC(1534)

Washington Administrative Code (WAC) Chapter 173-201A, Water Quality Standards for Surface Waters of the State of Washington, issued by the Washington State Department of Ecology under RCW 90.48. Covers introduction (WAC 173-201A-010) and definitions (WAC 173-201A-020) including AKART, background conditions, best management practices, carcinogen, chronic/acute conditions, critical condition (7Q10 flow), ecoregions, fecal coliform, hardness, mixing

Office of the Hearing Examiner, Puget Sound Regional Council (PSRC) Findings, Conclusions, and Decision on City of Federal Way appeal (filed November 6, 1992) challenging adequacy of the Flight Plan Project Final Environmental Impact Statement (FEIS) issued by PSRC as nominal lead agency and Port of Seattle as co-lead agency. Appeal challenges FEIS adequacy in

Annotated bibliography on wetland mitigation replacement ratios, published February 1992 as Publication #92-09 by the Washington State Department of Ecology (Ecology), Shorelands and Environmental Assistance Program, Olympia, Washington. Edited by Andrew J. Castelle, Catherine Conolly, and Michael Emers (Adolfson Associates, Inc., Edmonds, WA) and Eric D. Metz, Susan Meyer, and Michael Witter (W & H

This document contains detailed chemical and environmental property data for Aroclor 1254, a polychlorinated biphenyl (PCB) mixture, including its molecular weight, water solubility, vapor pressure, and environmental fate characteristics. It covers sorption coefficients, half-lives in various environmental compartments (water, soil, sediment, biota), and bioconcentration factors in fish and other organisms. The data is compiled from numerous scientific studies published between the 1970s and late 1980s.

AR037747. Draft Final Report of the Puget Sound Air Transportation Committee’s Flight Plan Project, January 1992, sponsored by the Puget Sound Regional Council and Port Of Seattle with FAA grants. Study findings and draft recommendations for long-term air carrier system needs of the Puget Sound Region, including a Draft Programmatic Environmental Impact Statement. Committee chaired

Academic article by Stanley V. Gregory, Frederick J. Swanson, W. Arthur McKee, and Kenneth W. Cummins published in BioScience Vol. 41 No. 8 (September 1991). Presents an ecosystem perspective of riparian zones as three-dimensional interfaces between terrestrial and aquatic ecosystems, focusing on geomorphic processes, valley floor landforms (floodplains, terraces, alluvial fans, active channels), terrestrial plant

This 1991 report by Sheldon and Associates, prepared for the Washington Department of Ecology, assesses wetland mitigation replacement ratios in the Puget Sound region. It evaluates compensation sites where wetlands were restored or created to offset permitted wetland losses, examining how well those sites functioned as replacements. The report provides findings, conclusions, and recommendations on compensation plan design, monitoring, and appropriate replacement ratios for regulatory guidance.

A 1990 environmental assessment by Roy F. Weston Inc. evaluated soil and groundwater quality on an undeveloped Seattle property along the Duwamish Waterway, where Boeing was considering a 50-year lease with Seattle City Light. The study examined areas where dredged sediment from the Duwamish Waterway had been deposited in 1968 and 1985, testing for contaminants including PCBs, pentachlorophenols, PAHs, and metals. Prior sampling had found contaminant levels generally below state-regulated thresholds, and this baseline assessment was conducted to document existing conditions before any lease agreement was finalized.

A May 1989 environmental report from Hart Crowser, Inc. details the installation of three groundwater monitoring wells (WY-1, WY-2, WY-3) near underground fuel storage tanks at the Weyerhaeuser Aviation facility at Sea-Tac International Airport. Soil samples collected during drilling showed no detectable petroleum contamination, and no groundwater was encountered at the site. The report was prepared to help Weyerhaeuser comply with the Port of Seattle's NPDES permit requirements and to assess subsurface soil conditions around the tanks.

Army Corps of Engineers Regulatory Guidance Letter 87-03, dated April 14, 1987, clarifying requirements for Section 401 water quality certification under the Clean Water Act. Covers when certification or waiver is required before Federal permit issuance, the effect of state denial or court voidance before and after permit issuance, and the ‘reasonable period of time’