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Page 3 of 5 8. MONITORING PLAN: (CONTINUED) b. Tank Annular Space Monitoring: The annular space between the primary and secondary containers is filled with water and fitted with a reservoir mounted at the top of the tank. Should the inner wall of the tank fail, the water inside the annular space would flow into the tank lowering the water level in the reservoir. This would set off an alarm at the control panel notifying the Owner of a potential leak. Should the outer wall (secondary container) fail, the water_ would flow out of the annular space lowering the water level in the reservoir which would signal an alarm. c. Subpump and Product Piping Monitor: This monitoring probe (Ronan Float Switch) is located inside the subpump secondary containment box, (also the law point of the product piping) . Its function is to detect the presence of liquid in the containment box which would indicate a leak in the product piping or subpump. If any liquid is detected, the subpump will automatically be shut down and an audible and visual alarm will alert the Owner of a potential leak. d. Pressurized piping systems shall be monitored utilizing on line leak detectors. Operator is to be aware that reduction in product flow to 3 + gallons per minute indicates a potential leak. Leak detectors will be tested yearly for proper operation. e. Dispensers: Product Dispensers are to be equipped with a containment box located at the base. Should a leak occur in the dispenser, the liquid would activate a mechanical float switch, closing the shear valve and be contained by the containment box. f. Records and Inspections - All records of underground tanks and petroleum piping shall be logged in writing using corresponding inspection log. Following is a list of monitoring activities and inspection which will be recorded. 1. Weekly visual inspections shall be made of: - Submerged Pump Boxes - Fill Boxes (also inspected after each delivery) - Reconcilation of the inventory control records g. Emergency Response Procedure: Once the operator is aware of a potential leak he shall: - Shut the system down using pump shut-off switch - Attempt to isolate leak location by inspection - Contact the City Fire Department - Record the leak with the action taken on the recordable discharge log (Incident shall be signed by the responsible representative:) . These procedures along with emergency telephone numbers will be posted in the Owner's office. The Shell Oil Company shall be responsible for contacting the local Environmental Health, Fire Department and a local petroleum maintenance contractor if a leak is confirmed. Hazardous materials shall be cleaned up in a timely manner or as required by Environmental Health and/or Fire Departments.