8925 AIRPORT RD MUKILTEO SCHOOL DISTRICT 2018-01-02 MF Import

1.7 Management should provide a designated area for car washing. That area should be tied into the sanitary sewer where feasible. If this is not possible, then pretreatment, such as a grassed swale, should be used before the runoff from the area enters a stormwater management system. Separate receptacles should be provided for oil and antifreeze dumping. An effort should be made to recycle these wastes. Wastes must be disposed of in a manner which will not adversely impact the water quality of the state. 1.8 The owner of a construction site which disturbs five acres or more of total land area, and which has or will have a discharge . of storm water to a surface water or ta a storm sewer, must apply for coverage uader Ecology's Baseline General Permit for Storm Water Discharges Associated with Industrial Activities. Owners of sites where less than five acres of total land area aill be diaturbed must also apply if the construction activity is part of a larger plan of development or sale in which more than five acres will eventually be 3lsturbed. Diacharge of storm water from such sites without a permit is illegal and subject to eaforcement action by the Department of Ecology. 1.9 Application should be made at least 30 days prior to commencement of the construction activities. A storm water permit application form, referred to as a Notice of Intent, can be obtained by calling (206) 438-7034. If you have any questions, please call Mr. Bob Wright with oux Water Quality Program at (206) G49-7060. Mitigation af Adverse ImDacts by SEPA: 1. Any grading/fill on this site shall be doae so as to not impact the surrounding properties. CSEPA Earth, I.and and Shoreline Use Policies) 2. Full standard street improvements are required to Rasch Park Road, including but not limited to curb, gLtter, sidewallc, and stseet widening. (SEPA Circulation Policies) 3. Storm water runoff from paved surfaces muat be routed through eithes a wetpond or a baffletype oil/water separatar in series with a vegetated swale, prior to discharge from the site or to wetland or stream areas. These water quality enhancing facilities must be designed in accordance with City standards. CSEPA Water Policies) 4. No stormvnater facilities, including detention facilities or vegetated � swales, may be located inside wetland or stream buffer areas. Natural wetlands or wetlands created for mitigation may not be used far detention of stormwater. (SEPA Water Policies) -4-