Resolution 3528 - Laserfiche WebLink

• Mitigation was provided in the Decision Document based on the assumption that 5,600,000 square feet of new construction would occur. • Mitigation requirements included in the Decision Document are based upon worst case impacts or the most intensive development permitted on the Boeing/Everett site. • Cumulative impacts of the project have been considered. • Appellant has not demonstrated that the decision of the Responsible Official is unreasonable or that it requires mitigation. Decision: Deny the appeal and affirm that the Decision Document with regard to this issue. SECTION 8: SAND PEAT FILTER SYSTEM Findings: • The City does not have a water quality monitoring policy nor ordinance which requires water quality monitoring of surface water from development sites. Historically, the City has not imposed these requirements on other developments. Any surface water quality monitoring requirement must be based on specific environmental impacts identified in the (SEPA) environmental analysis. • A number of aircraft fueling stations exist south of SR-526. Accidental fuel spills are likely to occasionally occur at this location. State of the art (API modified coalescing plate separator) source controls have been installed at this location (see DEIS App. c,pp 1-17 & 1-18&2-8 -2-10) and additional controls have been required by the Decision Document (see Decision Document Area 3b(1) Fueling Area, pp 29-30). All of the fueling station area drains into the Powder Mill Gulch surface water treatment system (see DEIS App. c, Fig. 2-1). • The purpose of the sand peat filter system is solely for treatment of surface water to remove pollutants. • The sand peat filter system was previously approved by the City as the best alternative water quality control system for Powder Mill Creek (SEPA Number 72-89) • The sand peat filters were constructed ahead of the majority of the wetland complex to allow time for testing and fine tuning. The filters first operated in November, 1990. Their operation and that of the sedimentation basin are critically linked and are being fine tuned together. This process is expected to be substantially complete by the time the full 11