8920 EVERGREEN WAY THE RESERVE 2025-07-25

CITY OF EVERETT STORMWATER MANAGEMENT MANUAL hazardous must be disposed of at a licensed municipal solid waste disposal facility. The list in Appendix B has the phone numbers and addresses of these facilities in the City. Dangerous and hazardous wastes must be properly transported to an appropriate hazardous waste treatment, storage, and disposal facility. Costs of disposal vary considerably from option to option. Especially in the case of dangerous wastes, different types of wastes should be kept segregated. Disposal costs are usually determined by the most hazardous or difficult to dispose of waste present, so costs can be kept down by not mixing wastes. The Snohomish Health District Hazardous Waste section at(425)339-5200 can help determine the best disposal options for the waste. • 4.2.2 S.2 Connect Process Water Discharges to a Sanitary Sewer, Holding Tank, or Wastewater Treatment System This BMP is a minimum requirement for all industrial and commercial activities that generate contaminated process wastewater, such as washing activities, composting activities, and production and processing activities. The water used in these activities cannot drain to surface waters or groundwater untreated. Process water must drain to a sanitary sewer,holding tank, or wastewater treatment system, or it can be recycled. The first priority for these businesses is discharge of process water to a sanitary sewer via a new or existing plumbing connection. In order to connect to the sewer,the City's Industrial Pretreatment Program must be contacted at(425)257-8874 for information on permits for the connection. Pretreatment of industrial wastewaters will often be necessary before it is allowed to discharge to the sewer,and more information can be obtained by calling the number above. If a sanitary sewer is not available, or if it is determined that a discharge connection is not allowed,the only remaining options are holding tanks or an onsite wastewater treatment facility. Consideration should be given to using a holding tank for used process water if the volume of process water generated by the activity is not excessive. The contents of the holding tank must be pumped out or drained before the tank is full and disposed of properly(see BMP S.2 in this chapter for information on disposal options). If a sanitary sewer connection cannot be made and a holding tank is not used, a wastewater treatment facility must be constructed on the site. This treatment facility must be designed to receive and effectively treat all discharges of process water from the business. Ecology must be contacted for approval of such a facility, since discharges from the treatment facility will enter surface waters or be spread on land. See Appendix A for Ecology's requirements for discharges of process waters. For all types of process water discharges the following measures are required if the activity is to remain uncovered. Define a designated area for the activity and provide a mechanism for prevention of stormwater run-on into the activity area. This can be a curb,dike, or berm(see BMP S.7 in this chapter for more information)or similar effective means to prevent run-on. In this manner,only the precipitation that falls within the activity area is discharged and/or treated along with the activity process water. The designated area should be paved and sloped to a central collection drain. The collection drain must connect to the sanitary sewer(with pretreatment if required),the onsite holding tank, or the onsite treatment facility,whichever method is selected. This process water BMP can be made more effective if the activity is covered,thus reducing the total amount of water to be treated. Volume IV— Source Control 4-2