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1 1 1 1 1 The City of Everett The Floyd & Snider Team Everett Landfill/Tire Fire Site 3.5.4 EVALUATION METHODS The continuous in -building alarm system will automatically activate the controls and alarms described above at a flammable gas concentration of 1,000 ppm. Additional alarms and notifications will occur as described above at 10,000 ppm. The monitoring technician will note and record the readings of the monitoring instrument. Readings in excess of 100 ppm would be cause for further investigation and implementation of contingency plans. 3.5.5 REPORTING REQUIREMENTS The data from the periodic monitoring will be reported to Ecology on an annual basis. The report will include the dates of sampling, the locations sampled, and the results. If a result exceeds the regulatory limit it will be reported to Ecology within 7 days. The report to Ecology will include the same information as above as well as actions taken and anticipated to correct the excessive gas migration. 3.5.6 CONTINGENCY PLAN TRIGGERS The trigger for ground floor monitoring sensors will be 1,000 ppm for initial response and 10,000 ppm for secondary response. Manual, periodic monitoring will initiate contingencies if flammable gas concentration exceeds 100 ppm. 3.5.7 CONTINGENCY PLAN The ground floor monitoring system will trigger increased ventilation from the installed HVAC system. The increase will provide at least four air changes per hour. The intake will provide 100% outside make-up air. The exhaust will discharge to the outside at a point away from the intake. The ground floor alarm system will also trigger an auto -dialer to call a tier of responsible persons who can have the building inspected to find the source of the flammable gas. The inspection will attempt to pinpoint the entry point of methane into the building. Once found the leak will be sealed, blocked or otherwise stopped. Additionally, personnel will inspect and adjust the vacuum extraction pipes under the affected building to verify proper operation and increase applied vacuum if necessary. Above 10,000 ppm, the ground floor monitoring system would activate further alarms causing the building to be evacuated and the fire department notified. The periodic manual inspection trigger would initiate corrective action at the point where the exceedance was measured. This will typically be a small leak around a joint or through a crack. The leak would be sealed, blocked or otherwise stopped. The effectiveness of the repair would be monitored weekly for one month and thereafter resume normal periodic monitoring. Monitoring P an\CM Everett t-andrll\PDF maker -final dots\Compliance Compliance Monitoring and Contingency Plan Monitoring PIan1CMCP 1 1-10-OO.doc FINAL - March 2001 Page 3-9