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1 The City of Everett The Floyd & Snider Team Everett Landfill/Tire Fire Site Solid Waste Landfills). The intent of this monitoring is to identify locations where landfill gas may be entering the building. Permanently mounted, continuous monitors are located in the Animal Shelter. These monitors sound an alarm if flammable gas is detected at 1,000 ppm. They will be calibrated in accordance with the manufacturer's recommendations. 3.4.1.2 Frequency of Sampling Normal frequency of monitoring will be quarterly. More frequent monitoring as described above will be initiated if a measurement exceeds a contingency trigger. 3.4.1.3 Evaluation Methods The continuous in -building alarm system will activate if flammable gas concentration reaches 1,000 ppm. Activation of the alarm will cause employees to notify the Everett Public Works Department and the Fire Department and evacuate the building. 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. 3.4.1.4 Reporting Requirements The City will transmit compliance monitoring results and status of corrective actions to Ecology on a monthly basis until the MTCA Cleanup Action Plan and Consent Decree are finalized. Thereafter, the City will transmit the results to Ecology annually. Ecology will be notified within 7 days of any confirmed exceedance that triggers contingency plans. 3.4.1.5 Contingency Plan Triggers If the 100 ppm (methane) action level is exceeded during periodic monitoring, the City will implement contingency measures. Actuation of the continuous alarm set at 1,000 ppm would also cause the City to implement contingency measures. 3.4.1.6 Contingency Plan If any monitoring triggers contingency measures they will be implemented in the order they are presented below. 1. The instrument will be recalibrated, or a second instrument will be used, to verify the occurrence. Sampling will be repeated daily for three days to verify occurrence. 2. If the exceedance occurred at an Animal Shelter floor drain, joint or crack, the City will seal or re -seal that location within one week. Compliance monitoring will be performed as described above. If further exceedances are detected during compliance monitoring, the City will install a wall -mounted, full time monitor in that room of the Animal Shelter. 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 Public Works Department and Fire Department if an alarm sounds R Everett Lan00.dfill\PDF docslCompliance maker -final Plan\C Compliance Monitoring and Contingency Plan Monitoring Plan\CMCP 11-10-OO.doc Monitoring FINAL - March 2001 Page 34