Complete Compiled Specification.pdf - Peck Ormsby Construction

B. Abandoned Manholes and Structures: Excavate around manholes and structures as required
and use one procedure below:
1. Remove manhole or structure and close open ends of remaining piping.
2. Remove top of manhole or structure down to at least 36 inches below final grade. Fill to
within 12 inches of top with stone, rubble, gravel, or compacted dirt. Fill to top with
concrete.
C. Backfill to grade according to Division 2 Section "Earth Moving."
3.10 IDENTIFICATION
A. Materials and their installation are specified in Division 2 Section "Earth Moving." Arrange for
installation of green warning tape directly over piping and at outside edge of underground
structures.
1. Use warning tape or detectable warning tape over ferrous piping.
2. Use detectable warning tape over nonferrous piping and over edges of underground
structures.
3.11 FIELD QUALITY CONTROL
A. Inspect interior of piping to determine whether line displacement or other damage has occurred.
Inspect after approximately 24 inches of backfill is in place, and again at completion of Project.
1. Submit separate reports for each system inspection.
2. Defects requiring correction include the following:
a. Alignment: Less than full diameter of inside of pipe is visible between structures.
b. Deflection: Flexible piping with deflection that prevents passage of ball or cylinder
of size not less than 92.5 percent of piping diameter.
c. Crushed, broken, cracked, or otherwise damaged piping.
d. Infiltration: Water leakage into piping.
e. Exfiltration: Water leakage from or around piping.
f. Test for infiltration or exfiltration between manholes as follows:
1) Clean section of sewer line of dirt. Debris, gravel, rocks and other items.
2) Fill section between manholes with water. Allow water to sit in pipe for not
less than 3-hours to acclimate to surrounding earth temperature.
3) Use a water pump to pressurize the sewer pipe section to not less than 5 psi
and not more than 10 psi. Record starting pressure.
4) Turn off water pressure and wait 20 minutes.
5) Refill pipe to same pressure as in step 3 and measure volume required to fill
pipe to same pressure.
6) Pipe section passes test if volume required to refill pipe is less than !-gallon
per 400 feet of 8-inch pipe. Prorate the allowable seepage larger or smaller
pipes and for shorter or longer distances.
7) Find and fix leaks in any section that fails to pass test. Fix any visible leaks
found even if section of pipe passes test.
3. Replace defective piping using new materials, and repeat inspections until defects are
within allowances specified.
4. Re-inspect and repeat procedure until results are satisfactory.
SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION
SANITARY SEWEAGE PIPING
MARCH 2, 2009
02608 - 10