TagWAC(42)

This draft document from Washington State's Department of Ecology outlines requirements for a Low Flow Technical Report and a Low Flow Operation Plan related to MPU development activities. The Technical Report must include all calculations, engineering analyses, and hydrological studies needed to address low flow impacts, and must be stamped by a licensed Washington civil engineer. The Operation Plan must detail how stormwater and groundwater will be managed to mitigate those impacts, including maintenance procedures, performance standards, and methods to ensure those standards are met.

This document outlines Washington State water quality standards for surface waters, including criteria for total phosphorus levels in lakes across different ecoregions (Cascades and Columbia Basin) and limits for toxic substances such as heavy metals, pesticides, and radioactive materials. It establishes trophic state classifications and action values that trigger lake-specific studies when exceeded, and sets numerical criteria for aquatic life protection in both freshwater and marine environments.

Fax dated 8/20/02 from Sandra Manning (Washington State Department of Ecology, Shorelands and Environmental Assistance Program) to Tom Young transmitting a signed stormwater agreement. Includes WQP Policy 1-22 (effective July 15, 2001), titled ‘Adopting Supplemental Treatment as a Best Management Practice and Defining Compliance with Water Quality Standards for Stormwater Impacts for the Water Quality

Port Of Seattle joinder filed March 5, 2002 in PCHB No. 01-160 supporting Department of Ecology’s motion in limine to exclude testimony of Thomas R. Luster pursuant to WAC 371-08-475(7). Argues that ER 701 prohibits lay witness opinion testimony and that WAC 371-08-475(7) precludes Luster from serving as an expert, requesting exclusion of all opinion

This document presents a technical analysis of the effect of increasing water hardness on Fresh Water Acute Water Quality Standards, referencing WAC 173.201A.040. It includes calculated values for copper and zinc acute water quality criteria at varying hardness levels (ranging from 10 to 110 mg/L), showing how the allowable concentrations change as hardness increases. The document was transmitted via fax in February 2002 from Water Resources Consulting LLC.

This document is a February 2002 fax from Water Resources Consulting LLC addressing the effect of increasing water hardness on fresh water acute water quality standards, referencing WAC 173.201A.040. It contains tables calculating acute water quality standards for copper and zinc at varying hardness levels in fresh water. The document appears to be part of an administrative record (AR 021262) and was transmitted between consultants, though its connection to Sea-Tac Airport noise policy is not evident from the content.

Ecology guidance document (AR017502, Part II of IV) explaining how to use PQL and MDL tables under the Model Toxics Control Act (MTCA). Covers Practical Quantitation Limits (PQLs), Method Detection Limits (MDLs), and comparisons to MTCA Method B cleanup levels for water and soil. Describes analytical methods from US EPA SW-846 (3000, 7000, 8000-8100, 8310,

Fill Criteria Derivation Chart (Exhibit E) for Third Runway Embankment at Sea-Tac Airport, revised 9-28-01. Charts fill dirt criteria for constituents including antimony, arsenic, barium, beryllium, chromium, copper, lead, mercury, selenium, silver, thallium, diesel, and heavy oils against Ecology criteria, FWS drainage layer cover values, and FINAL drainage layer cover values. References WAC 173-340-747(3)(a) and

Internal email chain dated June 27, 2001 from Peter Kmet (Ecology HQ/TCP) to Kevin Fitzpatrick, cc Chung K. Yee, marked ‘Deliberative Document Currently Exempt From Public Disclosure.’ Kmet recommends language for fill material criteria in the Draft 401 Certification for the Seattle-Tacoma International Airport Third Runway project, including: requiring the uppermost 6 feet of fill

This Washington State Department of Ecology fact sheet explains how the Model Toxics Control Act (Initiative 97, 1989) governs the cleanup of hazardous waste sites in Washington, outlining who is liable, how sites are identified, and the options available for conducting cleanups. Potentially liable parties — including past and present owners, operators, and those who transported or disposed of hazardous substances — may clean up sites independently or work cooperatively with Ecology through formal agreements such as consent decrees. Note: this document concerns hazardous waste site cleanup regulation and does not contain information related to Sea-Tac Airport noise policy.