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Cl DRAFT—RESPONSE TO COMMENTS, FINDINGS OF FACT, AND RECORD OF DECISION SILVER LAKE CENTER COMMERCIAL REDEVELOPMENT ENVIRONMENTAL ASSESSMENT WORKSHEET(EAW) S. Water Quality-Surface Water Runoff. The project will reduce peak runoff rates from the Wsting conditions. Modeling results predict a 26 percent reduction in phosphorus runoff from the 54-acre tributary watershed(a small portion of the drainage area is outside the subject property) following the construction of the first three ponds (Phase 1). The inclusion of the fourth basin will result in fiuther stormwater discharge rate reductions and will provide a 45 percent total reduction in phosphorus discharge relative to existing conditions. All stormwater ponding will meet or exceed RCWD permitting standards and significant negative impacts are not anticipated. 9. Water Quality-Wastewaters. Wastewater will be typical of developments of this sort and the estimated maximum potential wastewater production is 31,963 gallons per day. No adverse impacts on the sanitary sewer system are anticipated. 10. Ground Water-Potential for Contamination. Although some groundwater beneath the southwest portion of the site is known to contain low levels of petroleum contaminants from an off- site source,the proposed project is not expected to increase the potential for fhture releases of contaminants that could impact groundwater below the site because(1) substantial site cleanup has and will occur as a direct result of this redevelopment, (2)the majority of the site will be covered by impervious surfaces,(3)the proposed underground storage tanks will be installed and monitored in accordance with MPCA standards,and(4)all wastewater will be conveyed to the sanitary sewer system. 11. Solid Wastes;Hazardous Wastes;Storage Tanks. It is anticipated that solid waste generation will be typical of developments of this sort. The maximum potential solid waste generation for the ultimate development will likely be in-the range of 1,000 to 1,500 tons per year. Source separation will be encouraged by the St.Anthony Village for the restaurants and retail businesses to be constructed on the site and these businesses will be expected to take advantage of recycling programs to reduce costs for solid waste trucking and disposal. Three to five USTs may be installed during site redevelopment. Appropriate measures to minimize:environmental risks associated with solid wastes,hazardous wastes,and storage tanks are planned. 12. Traffic. The proposed project will have no significant impact on the signalized intersections near the project or on the regional roadway system surrounding the project. The unsignalized 'intersection of Silver Lake Road and the northern site driveway will operate at a poor level of service with Phase 1 or ultimate development if no mitigation is pursued. Signalization of this intersection is currently under discussion by the city, and, if signalized,this intersection would operate in the level B range. 13. Air Quality. No significant impacts are expected. 14. Adverse visual impacts. No significant visual nuisances are expected. 15. Compatibility with Plans. The proposed project is consistent with existing zoning and no conflicts with adjacent land uses are anticipated.