ST9605-LR 980213 (2)Utility & Environmental Services, Inc.
LOW PRESSUre.; AIR TEST FOR GRAVITY SANI,,,,RY SEWER
~h~ll be tested between successive manholes.
~ ~to the pipe~e until 4.0 psi gauge pressure has been reached. At that t~e the flow
~ ~ pressure shall be maintained between 3.5 and 4.5 psi gauge for at least two (2) m~ute~ to ~ow
~mc to cq~fibrium with thc temperature of thc pipe walls. Pressure in thc pipe sh~ be co~t~tly
~d hose ~r~gemeat sep~atc lrmn the hose used to intr~ucc air ~to the ~e.
~o~ed to exc~d 5 psi.
ha~ ~tab~ed and no ak leaks at thc plugs have been found, thc air p[cssure shdl be used to
~:.~ req~ed [or the air pressu[e to drop to 2.5 psi gauge.
I~ for the ~ pressure to decre~e form 3.5 to 2.5 psi exceeds that shown ~ the
~ to be ~t~n acceptable limits ~or leakage.
~ ~ that shown in thc table, thc contractor shall m~e cogrcctions to reduce the le~age to
I .re , ] Test I Mandrel
~10 Station Pipe Size L.F. Tested Time Passed? Passed?
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O[ Utility & Environment~ Services, Inc. ~