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The contractor will supply and hookup all necessary equipment and materials to restore vacuum on bulk oxygen reserve tank. And perform industry standard leak test. If feasible, repair leaks. Work is l... The contractor will supply and hookup all necessary equipment and materials to restore vacuum on bulk oxygen reserve tank. And perform industry standard leak test. If feasible, repair leaks. Work is located at VAMC Dallas, 4500 S Lancaster Rd, Dallas, TX 75216. Bulk oxygen reserve tank has suddenly lost vacuum in the interstitial space between the inner and outer shell. This has resulted in ambient heat vaporizing liquid oxygen stored for reserve use and subsequent discharge into oxygen supply line, negating its viability to function as a reserve.