The inspection, handling, storage, installation
and testing of all piping and appurtenances shall conform to AWWA
C600 Specification for any typical installation details which may
pertain to the public water main.
Special care in handling shall be exercised
during delivery and distribution of pipe and appurtenances to avoid
damage. Damaged materials shall be rejected and replaced at the contractor's
expense. The pipe shall be stored prior to use in such a manner as
to prevent damage and keep the interior free from dirt and foreign
matter. Any pipe that becomes contaminated shall be hand-cleaned and
washed before it is incorporated in the work. It must be stressed
that contamination in the line will prolong and impede the disinfection
operation. Flushing cannot be too heavily relied upon for cleaning
due to the low velocity of water flow.
Each length of pipe shall be marked in accordance
with ANSI Specification A21.51 (AWWA C151) as to manufacturer and
class.
[Amended 1-19-1999 by L.L. No. 2-1999]
A. General backfill and fill materials. The contractor
shall provide approved soil materials for backfill and fill which
shall be free of clay, rock larger than six inches in any dimension,
debris, waste, frozen materials and vegetable, organic and other deleterious
matter.
B. Immediately after the pipes have been laid, backfilling shall be done with approved material. The material surrounding the pipe shall be carefully placed and carefully backfilled and tamped so as to have a thoroughly compacted material. Backfill material shall be placed evenly and carefully above the pipe in six-inch layers, and each layer shall be thoroughly tamped until one foot of cover exists over the pipe. The remainder of the backfill may be material excavated from the trench containing no stones larger than six inches in diameter but shall be carefully placed and compacted, if the contractor wishes to use excavated trench material, such material shall be stockpiled and tested in accordance with ASTM D698, Method C, including Note 2, so that proctor testing baseline can be established. Testing shall be performed by an approved laboratory. Until excavated material is tested and approved, the contractor shall utilize backfill material specified in Subsection
C below.
C. Suitable backfill.
(1) If, in the opinion of the Engineer, the material excavated
from the trench is not suitable to be used as backfill, the Engineer
may direct that the trench be backfilled with well-graded granular
material or run-of-bank gravel free from organic matter conforming
to NYSDOT Item 304.02, Type I, with the following gradation:
Size
|
WT Percent Passing
|
---|
3 inches
|
100
|
2 inches
|
90-100
|
1/4 inch
|
30-65
|
No. 40
|
5-40
|
No. 200
|
0-10
|
(2) A sample of the material shall be submitted for approval.
The Engineer shall be advised in writing of its source and furnished
with certification of conformance with the specification.