3800 RIVERFRONT BLVD 2025-07-23 - Laserfiche WebLink

1 The City of Everett The Floyd & Snider Team Everett Landfill/Tire Fire Site 3.4.2.5 Contingency Plan Triggers Actuation of the continuous alarm set at 1,000 ppm would cause the SCSWD to implement contingency measures. 3.4.2.6 Contingency Plan Contingency measures will be implemented in the order they are presented below. The alarm will be set at 1,000 ppm to sound an audible alarm. Employees will be instructed to open doors, increase ventilation, and notify the SCSWD, Everett Public Works Department and Fire Department if an alarm sounds. Additional measures that SCSWD could take include: • Ventilating the building • Pinpointing, if possible, the entry point of methane into the building • Seal, block or otherwise stop the methane entry • Increase the normal air exchange rate within the building • Remove skirts from portable buildings • Improve ventilation beneath buildings • Improve the traps in sanitary sewers and check that they are full of water • Post "Warning/Do Not Enter/No Smoking" signs at the entry to confined spaces outside and/or underneath the buildings • Localized vacuum extraction wells The potential solution would be reviewed and approved by Ecology. 3.4.3 OFF -SITE BUILDING GAS MONITORING 3.4.3.1 Sampling and Inspection Plan Three buildings on the north side of the landfill and three buildings on the west side of the landfill will be monitored. A trained, qualified technician will conduct periodic sampling and inspection. The technician will use an appropriate methane detection field instrument capable of accurately measuring concentrations down to less than five ppm. With owner permission, the monitoring technician will check every ground floor room within each building with the monitoring instrument. The breathing zone within the building will be tested generally. Any penetration of the building structure will be tested. Penetrations include cracks in the floor and retaining walls, floor drains, sinks, toilets, showers, and tubs, interior ends of incoming utility conduits, power panels, and phone panels or switchboxes. The monitoring technician will also check exterior enclosed spaces by inserting the instrument probe into the space (no personnel entry). Enclosed spaces to be checked may include crawl spaces under buildings, manholes, roof drains, and catch basins. FAprojects\COEµBR Everett Landfill\PDF maker - final docs\Compliance Compliance Monitoring and Contingency Plan Monitoring Plan\CMCP 11-10-OO.doc p 9 9 Y FINAL - March 2001 Page 3-6