9826 7TH AVE SE 2025-06-25 - Laserfiche WebLink

SD&C PO Box 413, White Salmon, WA 98672 September 26, 2023 Don Cunningham Code Enforcement Officer Permit Services 3200 Cedar Street 2nd Floor Everett, WA 98201 Phone (206)459-5775 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 from the operational portions of the facility by closing the oil stop valve. The stormwater collects in a 4,500-gallon underground vault which is no longer required for secondary containment from the above ground storage tanks. The non -operational areas, including the roof drains from the adjacent shopping mall, located to the west of the property, and northeastern located storm drain are not interrupted and continue to discharge to the drainage swale located off -site to the west. As interim practice, Nelson is monitoring the volume of water collecting in the underground vault and disposing the water off site. During the recent rain approximately 2,500 gallons of water which collected in the vault was disposed off -site using a subcontractor Marine Vacuum Service. If you have any questions concerning the Interim Discharge Plan or the facility, please contact SD&C at (206) 459-5775 or Kory DeMun, Facility Coordinator with Nelson Petroleum Inc. at (425) 353-9701. Sincerely, SD&C L' S. SloWa, Timothy S Slotta L.G. L.H.G. L.E.G Hydrogeologist # 2175 Pace Engineering John Anderson P.E. Professional Engineer