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�� PEI/RP1200-12 • A UST system component or dispenser that is leaking response procedure specified by the facility owner or fuel or vapor should not remain in service. If a leak is operator. A spill kit should be readily available at the discovered, deactivate the system or component,label facility. it"Out of Service"and notify the appropriate person. Avoid igniting spilled fuel. Immediately remove people 3.5 People Hazards. Other personnel present at a from the area and verify that no open flames or other facility may cause significant hazards.Customers operat- ignition sources are in the area of the spill. Do not allow ing vehicles,facility managers or operators who re-ener- the starting of vehicles in the area. gize electrical circuits that have been turned off,or clerks who authorize sales at dispensers that are being serviced Handle and dispose of used spill cleanup and sorbent are hazards that must be anticipated and addressed. materials according to instructions provided by the owner or operator of the facility. Do not store contaminated Always advise personnel in charge of point-of-sale sys- materials inside a building. tems and the facility management of work to be done. Take note of traffic patterns. Note the activities of any The owner or operator should report any spill or discharg- other workers at the facility and discuss with them ways es to the authority having jurisdiction (AHJ) as required of minimizing or eliminating any hazards that may be by law. In some locations, reporting to more than one presented by their activities. authority may be required. Use traffic barriers, personal protective equipment, lock- 3.10 Vehicle Hazards. Vehicles can present one of the out/tagout procedures, fuel shutoff valves and pump more serious and common safety hazards while working electrical disconnects as necessary to ensure safety dur- at dispenser islands and areas where traffic is present at ing dispenser and tank system inspection, testing and UST facilities.Drivers often are distracted and inattentive maintenance activities. at UST facilities, and may not notice personnel conduct- ing testing,maintenance or repair activities. 3.6 Test Equipment. Use equipment intended for test- ing spill, overfill, leak detection and secondary contain- Take appropriate safety precautions prior to performing ment equipment. any inspection, testing or maintenance of overfill, leak detection and release prevention equipment. For tests that impose a vacuum on a containment volume or interstitial space, use only an air-operated vacuum Workers should wear high-visibility safety vests while working in areas where vehicle traffic may be present. source or a vacuum pump powered by an explosion- proof motor. Vacuum pumps with electric motors that Use safety cones,barricades,warning signs and/or barrier are not explosion-proof may ignite flammable vapors. If tape to designate and isolate work areas. Take care not to a portable air compressor is used, it should be located at place tools or equipment outside the designated area. Do least 20 feet away from the venturi-eductor or outside any not remove safety equipment,barricades or signs until all Class I,Division 1 area. work is completed and equipment is ready to be returned to service. 3,7 Confined Space Entry. UST system containment sumps may be large enough to present hazards associated with confined space entry. Refer to OSHA 1910.146 for further guidance on confined space entry procedures. 3.8 use of water Versus Product for Testing. Do 4. TANK SECONDARY not use gasoline, gasolinelethanol blends, diesel fuel or CONTAINMENT INTEGRITY other stored liquids to test the integrity of spill buck- TESTING ets and containment sump walls. Use water or other approved monitoring liquid for tests requiring a test liq- uid.A release of product from a leaking system presents 4.1 General. Double-walled tanks have interstitial a safety hazard and could cause environmental damage. spaces that can be tested for integrity. Follow the guidelines in Section 6.7 for proper disposal 'There are two methods for testing the integrity of tank of water used in testing. secondary containment systems—dry and wet. Dry test methods use a partial vacuum to determine the integrity 3.9 Responding to Spills. Spills may occur during of the containment.To perform a wet test on an existing maintenance, testing or repair activities. Follow the spill liquid-filled tank interstitial space, the liquid level in the 0 peLorg