7000 HARDESON RD 2020-06-05 - Laserfiche WebLink

h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Construction BMPs will be in place for risks of erosion. Primarily this will be in the form of silt fence or coir log in areas where new outfall pipes will be placed. 2. Air a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. Construction equipment exhaust, asphalt placement, and paint for parking area striping will be sources of emission during the project. Durning and after construction, the site will continue to operate as a bus yard and transit facility, with associated vehicle emissions. The finished project will not increase the amount of emissions from existing levels. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. There are no anticipated off-site sources of emissions that may affect the project. c. Proposed measures to reduce or control emissions or other impacts to air, if any: Construction vehicles and equipment will be turned off when not in use to the extent practical. Unncessary idling during construction will be minimized. Contractors will be encouraged to use Ultra-Low Sulfur Diesel fuel (ULSD). Water spray will be used to keep dust to a minimum as needed. 3. Water a. Surface Water: 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. Merrill Ring Creek borders the eastern property edge and is a seasonal stream at this segment and upstream. Year round flows initiate though spring and seep flows 4,000 ft. downstream at the Merrill Creek Parkway. 2)Will the project require any work over, in, or adjacent to (within 200 feet)the described waters? If yes, please describe and attach available plans. Yes. The work will be within the footprint of previous construction and location of existing outfalls. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. None 4)Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. Existing outfalls are within the 100-year floodplain of the engineered channel. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. No SEPA Environmental checklist(WAG 197-11-960) July 2016 Page 8 of 15