COMPLIANCE INFO_1997-1998 - Laserfiche WebLink

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r • 0 ELECTRONIC MONITORING SYSTEMS This station is equipped with an electronic monitoring system for underground tanks and piping. In the event of a leak in the primary containment, product will be contained in the annular space. The sensors for the electronic monitoring system are located at the low end of each tank, and at the low end of the piping where the product will drain back into the tank. There may be sensors at additional locations. Sensors will signal the presence of a leak. If a leak is discovered, the "Unauthorized Release Report" must be sent to UNOCAL within 24 hours. The "Release Evaluation Checklist" must be attached to the "Quarterly Report." OVERFILL/SPILL PROTECTION 1. DELIVERIES/GAUGING 1. Dealer is responsible to ensure that the delivery he or she requests is not in excess of the tank capacity, taking into consideration the amount currently in tank. Driver is to gauge tank to assure capacity is available for the entire load and must remain in attendance during the entire delivery to monitor the operation. 2. Each tank will also be equipped with its own electronic in -tank gauge. 2. BALL VENT LINE FLOAT SYSTEM (Only for double-wall tanks installed after July 1986.) The ball float valve system installed with the tank substantially prevents the possibility of overfill occurring. If the tank is filled to the ball float level, the petroleum product delivery will be cut to 3 gallons per minute alerting the driver of a potential overfill condition. In the event that this occurs, the following actions will be taken: 1. The delivery truck driver shall turn off the petroleum product supply at the truck, leaving the hose fully connected to the tank fill pipe line and the truck. 2. The small amount of petroleum product remaining in the hose shall be slowly drained into the tank. Since the ball float valve is 2 to 3 inches below the top of the tank, there remains a 100+ gallon capacity within the tank at the moment when the ball float closes off delivery. The bleed hole in the ball float valve allows the remaining petroleum product in the hose to completely drain through the fill pipe into the tank. 3. The hose shall be disconnected from the fill pipe only when it has fully drained. In the event that spillage occurs upon hose disconnection, the remaining small amount of petroleum product will be properly contained. 3. AUTOMATIC HIGH LEVEL SHUT-OFF SWITCH 1. Each product tank will be equipped with an OPW 61 -SO automatic shut-off switch located near the top of the tank within the submerged fill tube. When product level is 2-3 inches below the top of tank a float is actuated thereby stopping product flow into the tank through the fill tube. N