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22.0 FLEXWOR S SYSTEM MAINTENANCE The FlexWorks System is designed to provide reliable underground fuel transfer and short-term secondary containment of leaked petroleum product. FlexWorks sumps and secondary containment pipes are not intended for long term storage of petroleum products. Liquid that accumulates in the secondary containment system must be promptly removed and properly disposed of. Operational third party approved liquid sensors should be installed and maintained in each sump to reliably indicate to the operator that liquid is present in the secondary containment system. Once a leak is detected, the system must be shut down immediately and the source of the leak must be repaired. All liquid must be thoroughly flushed and cleaned out of the secondary containment system at once. Inspect all system components at least monthly for leaks or damage, and repair or replace any suspect component as necessary. 22.1 ROUTINE SUMP INSPECTIONS Visual inspections of all containment sumps and components should be made on a routine basis to check for damage, water infiltration or for any signs of leaking product. An electronic or mechanical shut-off leak detection system is recommended for all containment sumps. When changing fuel filters at the dispenser, make sure any spilled product is cleaned out of the bottom of the dispenser sump. Sumps are to be kept free of debris and spilled fuel. NOTE: Failure to remove fuel and liquids from containment sumps may compromise the performance and integrity of the sump and its associated fittings and seals over prolonged periods of time. Always follow warranty registration instruction and return warranty forms to OPW-FCS. 22.2 STORAGE AND TRANSIT Instructions shall specify that pipe and fittings are not intended for storage in direct sunlight or excessive temperatures and that rough handling (drops and impacts) during storage and transit may cause damage and leaking. Any special procedures for protection against environmental conditions and physical abuse during storage and transit shall be identified. Any special procedures for the inspection of parts for non- complying damage before assembly shall be identified with instructions specifying that a damaged part shall not be used. 23.0 PERIODIC INTERSTITIAL TESTING For periodic integrity testing of the interstitial space of the double wall pipe there is a different setup procedure for systems using coax fittings versus steel fittings with connector tubes. Both applications should have test tubes connected on each end. If they have been disconnected, reconnect them before testing. Follow the air pressure test procedures below for interstitial integrity testing, 23.1 Reconnect Test Tubes If necessary, reconnect the test tube located inside the tank sump to the test boot. Connect the test gauge assembly to the top end of the test tube. 23.2 Reconnect Connector Tubes If the piping system includes test boots with connector tubes then make sure all connector tubes have been reconnected. 19 L] FIC-4xWOORKS GY DPW FUELING CONTAINN12NT SYSTEMS 23.3 Plug Test Tube Plug and seal the test tube fitting located at the terminating end of the flexible piping line. 23.4 Air Pressurize Pressurize the interstitial space to 10 psi for a period of one hour, in accordance with Section 21, Interstitial Integrity Testing. If required, disconnect all tubes after test. Investigation If leakage or damage is detected in any part of the system (either by inspection of the sump, a leak detector, or similar monitors), the problems are to be immediately investigated by the site operator. Warning: Ignoring or disabling leak detection alarms may lead to further damage and possible failure. Notification If leakage or damage to the piping system is verified, notify the Technical Service Department of OPW Fueling Containment Systems at one of the below noted phone numbers: • 1-800-422-2525 Toll Free • 1-919-934-2786 Extension 104 26.0 GUIDE SPECIFICATIONS 26.1 Short Form The contractor shall provide a flexible underground piping system whereby the flexible piping, fittings, adapters and under dispenser riser pipes are secondarily contained anc having no metallic components exposed to the environment. The primary pipe shall be capable of being air pressure tested to 1.5 times the operating pressure of the pump not exceeding 60 psi. The secondary shall be capable of being air tested to 10 psi. 26.2 Long Form The following guide specification is designed around the use of OPW-FCS's flexible piping. 26.2.1 Design The contractor shall provide a secondarily contained flexible underground piping system that shall provide secondary containment for all primary piping, couplings, fittings and adapters. Piping runs shall be continuous between containment chambers (ie., tank & dispenser sumps or pans) in which all joints are contained within the containment chambers. The piping design shall allow for any leak in the primary supply or secondary containment piping to be directed to a leak detection sensor. 26.2.2 Product And Chemical Compatibility The flexible underground piping and associated couplings, fittings and adapters shall be chemically compatible with the products to be transported and with chemicals found naturally in the ground environment. The primary & sec-ondary piping shall be compatible with gasoline, alcohols, gasoline -alcohol mixtures and all EPA approved additives, including MTBE.