3600 SMITH AVE 2025-08-19 - Laserfiche WebLink

• Spill prevention measures,such as drip pans,will be used when conducting maintenance and repair of vehicles or equipment. • In order to perform emergency repairs on-site,temporary plastic will be placed beneath and, if raining, over the vehicle or equipment. • Contaminated surfaces shall be cleaned immediately following any discharge or spill incident. Concrete and Grout: • Process water and slurry resulting form concrete work will be prevented from entering the waters of the state by implementing Concrete Handling measures (BMP C151). Solid Waste: • Solid waste will be stored in a secure, clearly marked containers. Other: • Other BMPs will be administered as necessary to address any additional pollutant sources on- site. The facility is transportation related and therefore not subject to the Federal requirements of the Spill Prevention Control, and Countermeasures (SPCC) Plan under the Clean Water Act (CWA). If applicable, the Contractor shall prepare an SPCC Plan according to the Washington State Department of Transportation (WSDOT) requirements(see the WSDOT Standard Specifications for Road, Bridge, and Municipal Construction 2004). 3.1.10 Element#10—Control Dewatering All dewatering water from open cut excavation,tunneling, foundation work,trench, or underground vaults shall be discharged into a controlled conveyance system prior to discharge to a sediment trap or sediment pond. Channels will be stabilized, per Element#8. Clean, not-turbid dewatering will not be routed through stormwater sediment ponds and will be discharged to systems tributary to the receiving waters of the state in a manner that does not cause erosion,flooding,or violation of state water quality standards in the receiving water. Highly turbid dewatering water from soils known or suspected to be contaminated, or from use of construction equipment,will require additional monitoring and treatment as required for the specific pollutants based on the receiving waters into which the discharge is occurring. Such monitoring is the responsibility of the contractor. 12