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8.4 Flame Detectors Each LNG fueling station is equipped with multiple ultraviolet/infrared flame detectors strategically located to provide overlapping fields of view for the whole containment, offload, and dispensing areas. ■ Flame Detection The following safety measures take place automatically after aflame detection ❑ The station and pumps shut down ❑ All air-operated valves close ❑ The red alarm beacon illuminates ❑ The alarm horn activates ❑ The electrical power to all electrical equipment disconnects ❑ The Fire Detected Circuit on the FACP activates ❑ The FACP initiates communication to the fire monitoring service ❑ The alarm is logged into the alarm system of the PLC ■ Clearing the Alarm To clear a fire detection alarm,the following requirements must be met: ❑ The fire must no longer be present at the station ❑ If it is safe to do so,the alarm silence button on the front of the control panel must be pressed o This will silence the alarm horn, but will not clear the alarm or turn off the amber/red beacon ❑ The alarm reset button on the front of the control panel must be pressed o If the reset button is pressed while the detector still detects fire,the alarm will remain active and the red beacon will remain illuminated ❑ Offloading and dispensing will not be permitted to start until all alarms are acknowledged and cleared on the HMI screen of the PLC control system, located on the control panel ■ Fire Extinguishers Each LNG fueling station is equipped with multiple 20 Ib. dry chemical fire extinguishers. Refer to the layout drawings for the location of each fire extinguisher. Fire Fighting Procedures Clean Energy LNG fueling stations due not have an onsite emergency response team; in the event of a fire,all personnel have the authority to activate the emergency shutdown system and initiate evacuation procedures. Portable fire extinguishers are only for use in incipient (early) stages of a fire, and only by those personnel trained to do so. 8.5 Pressure Relief Valves Each section of LNG piping and pressure lines are equipped with relief valves to ensure the safe operating pressure of the fueling system.The relief valves protect the system from exceeding max allowable working pressure due to process upset, equipment failure, or fire. Storage vessels are equipped with dual relief valves and rupture disc assemblies. 8.6 Alarm System (Horns and Beacons) The Alarm System is activated (horn sounds and beacons illuminate) in the event of a significant methane detection (more than 20%of the LEL),fire detection, or activation of an ESD. An alarm horn, an amber beacon, and a red beacon are located on the top of the electrical control cabinet. When the alarm system is active, you can silence the horn by pressing the "alarm silence" button on the front of the main electrical cabinet. However, to turn off the beacons and place the LNG fueling station back into service, acknowledge the alarms on the HMI located on the front of the control panel. If an alarm is acknowledged, but the condition causing the alarm is still present (i.e. a methane detection that has not been resolved), the alarm will not be cleared and the LNG fueling station will not be permitted to operate — the amber or red beacon will remain illuminated. L/CNG Emergency Response Plan �, Clean Enerav- 6