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Premium Truck & Trailer Repair, Inc. <br /> Leak tests: <br /> The tank was leak tested and observed to pass leak tightness testing. Al <br /> the vents and openings were sealed with plugs or pneumatic pressure <br /> plugs. The tank was tested to 5.0 psi for one continious hour and passed <br /> its certification testing. <br /> z <br /> psi <br /> rf <br /> Figure 8 - UL Certified pressure testing <br />