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MONITORING PROCEDURES FOR DOUBLE WALL TANKS <br />EQUIPMENT AT THIS FACILITY: Veeder-Root TLS -350 Series 8470 <br />The Underground storage tanks are monitored using an approved continuous electronic monitoring <br />system (see below). This system is able to detect the presence of a leak in the primary as well as <br />secondary containment through the use of an annular space and submerged sensor. If an alarm or failure <br />conditions occurs, the Operator will call Chevron Maintenance Dispatch at 800-423-3528 <br />(24 hour) immediately. The Operator will then record the alarm condition on a log along with the <br />investigative/corrective action steps followed to resolve the situation. Response to the alarm condition will <br />occur within 24 hours. <br />If the alarm condition is NOT the result of an equipment failure, then Chevron will repair the tank system <br />in accordance with all local and state requirements. If the alarm condition is the result of an equipment <br />failure, Chevron will repair the equipment as required and ensure that it is functioning properly. <br />MONITORING SYSTEM <br />INTERSTITIAL MONITOR: X LIQUID FLOAT SWITCH SENSOR <br />EQUIPMENT AT THIS FACILITY: Veeder-Root TLS -350 Annular Space Monitor Series 8470 <br />MAINTENANCE CONTRACTOR: Chevron Maintenance Dispatch <br />The Operator or a designated employee performs visual monitoring of the tank monitor alarm box daily. <br />Please see the attached site map for the location of all equipment and forms for keeping monitoring <br />records at the site. The Operator will also perform inventory reconciliation according to the procedure <br />outlined in the Inventory reconciliation section of this plan. <br />The electronic monitoring devices are maintained according to manufacturer's recommendations. <br />Training will be given which includes information regarding: how to self test the electronic monitoring <br />equipment, what the equipment monitors, how to tell when the alarm goes off, how to perform inventory <br />reconciliation, record keeping requirements and procedures to follow in the event of alarm activation, <br />leak, suspected leak, or other emergency. All training is in accordance with the equipment manufacturer <br />recommendations. <br />See also "Chevron Leak Response Plan" <br />Chevron Maintenance Dispatch (24 Hour) 1-800-423-3528 <br />