9826 7TH AVE SE 2025-03-25 - Laserfiche WebLink

SD&C PO Box 413,White Salmon,WA 98672 Phone(206)459-5775 January 25,2024 Don Cunningham Code Enforcement Officer Permit Services 3200 Cedar Street 2°d Floor Everett,WA 98201 This Interim Discharge Prevention Plan(IDPP)has been prepared to respond to the City of Everett Corrective Action Notice Case Number:CE23-0368 dated 4/7/2023 for the Nelson Petroleum(Nelson)Property located at 9826 7th Ave SE in Everett,WA(Facility). This plan has been prepared using the professional oversight,survey,and design review of PACE Engineering,and Slotta Design and Consulting(SD&C). The IDPP is proposed to be implemented during the conversion from stormwater discharge to the sanitary sewer at the site. On June 14,2023 Nelson terminated the stormwater discharge to the downstream network by closing the oil stop valve, located upstream from site stormwater discharge structure along the west property line. There are three storm line branches that converge at the oil stop valve structure. The IDPP plan by PACE has identified the storm branches using different colors for the pipes. The three existing storm branches include the drainage collections system for the Pacific Pride fueling island(magenta color),Nelson fueling island(blue color) and parking lot drainage system(red color). Closure of the oil stop valve prevents any discharge to the downstream storm system and creates a closed storm system. Presently the only means to remove stormwater from the closed system is by a contract pumping service hauling stormwater to an offsite location. The contract pumping service has been utilized since June 2023,when the oil stop valve was closed. Copies of the pumping invoices are included in the submittal. Note:there was not enough rain accumulation in August or September to warrant pumping;rain accumulated in those months were pumped out in October). Elements of the current/proposed IDPP include: 1. Prevent any discharge to the downstream storm by closing the oil stop valve(done). 2. The closed storm system must be monitored daily to assess remaining storm retention volume(done). 3. Observe water level in the containment vault daily,and contact pumping service(Marine Vacuum Service)when it reaches half its capacity to be periodically pumped for off-site disposal.(done). 4. Pumping may be required more frequently if there are larger storm events that fill the closed storm system(done). 5. If there is an onsite spill,Nelson will follow the existing Spill Control Plan and notify the City(done).