HomeMy Public PortalAbout430750PART 4 – PIPE SEWER CONSTRUCTION
Section B, Pipe Field Tests, Paragraph 2, Reach Integrity Testing – delete
the first sentence and the following replacement applies:
All sanitary and combined sewers shall sustain a maximum leakage limit
of 100 gallons/inch of pipe diameter/mile of line/day, as required by the
Missouri Department of Natural Resources Specifications.
Section B, Pipe Field Tests, Paragraph 2, Reach Integrity Testing,
Subparagraph c, Infiltration/Exfiltration Testing – delete the sixth sentence,
concerning leakage limits, and the following replacement applies:
The measurement of leakage shall not exceed 100 gallons/inch of
pipe diameter/mile of line/day, as required by the Missouri
Department of Natural Resources Specifications.
Section B, Pipe Field Tests, Paragraph 4, Manhole Testing, Subparagraph
a, Vacuum Testing – after the first sentence, the following addition applies:
The vacuum test must be performed prior to backfilling around the
manhole unless the contractor provides documentation from the
precast manhole manufacturer stating that the manhole may be
vacuum tested after backfilling has taken place. The contractor
must submit this documentation prior to backfilling around any
manhole.
Section B, Pipe Field Tests, Paragraph 4, Manhole Testing, Subparagraph
b, Exfiltration Testing – delete the second sentence, concerning leakage limits,
and the following addition applies:
For exfiltration testing, the allowable leakage limit is 100
gallons/inch of pipe diameter/mile of line/day when the average
head on the test section is three feet (3’) or less.