The following rules, regulations and requirements shall be deemed to
be incorporated into and form a part of and are hereby made a part of the
terms and conditions for the supply and delivery of water furnished to all
parties and consumers whatsoever in the Town of Pawling, New York, and all
applicants, parties and consumers hereby expressly consent thereto as a condition
precedent. All subsequent changes in rules, regulations and requirements shall
constitute a part of the terms of use with the suppliers and consumers and
owners of property in the Town of Pawling, New York.
As used in this chapter, the following terms shall have the meanings
indicated:
BOARD
The Town Board of the Town of Pawling or its duly authorized employees
or agents.
CURB STOP (BOX)
A valve used for controlling the flow of water into the customer's
service line, located at the property line.
MAIN
A pipeline owned by a community water supplier within the town, used
for supplying water to more than one premises.
PUBLIC STREET OR WAY
The territorial limits of any street, avenue, road or way, whether
privately or publicly maintained, used for highway purposes.
SERVICE LINE
A water line from the edge of the consumer's property to his
building.
STREET SERVICE CONNECTION
A pipe with appurtenances used to conduct water from the main to
the property line of the premises.
Flushing, hydrostatic and leakage testing shall conform to appropriate
AWWA Standard C600 for Ductile-Iron Pipe and the following:
A. General.
(1) Testing is to be performed only after partial or complete
backfill and restraint blocking using high-early-strength cement has had 36
hours to cure or blocking using standard cement has had seven days to cure.
(2) The contractor shall furnish and install, complete with
reaction blocking, necessary plugs and caps required for this operation. Main
line valves shall be utilized wherever possible to segregate test sections,
except as directed by the Town Engineer or his representative.
(3) The contractor is to furnish all equipment and labor
to complete testing.
(4) The main shall be partially backfilled or braced against
movement during the test. All air must be bled out of the section to be tested.
If necessary, the contractor shall install corporation stops at the high points
for blowoffs. After all air has been expelled, the corporation cocks shall
be closed and the pressure test applied. After examination of exposed parts
of the system, the test pressure will be increased to one and one-half (11/2)
times the normal pressure, based upon the elevation of the lowest point in
the line or section under test, but such pressure shall not be less than 125
pounds per square inch or more than 200 pounds per square inch, and the exposed
parts again examined. The minimum duration of the leakage test shall be two
hours.
(5) Allowable system leakage shall be as specified in the
referenced standards. If leakage in the system is greater than allowable,
the contractor will locate and repair the system at his expense and retest;
continue to test and repair the system until leakage is within allowable limits.
B. Flushing and disinfection. The contractor shall disinfect
the pipeline in conformance with AWWA C651 (except that the tablet method
described in Section 5.1 of C651 shall not be used) and in accordance with
the following:
(1) Flushing. The contractor shall initially flush the pipeline
completely, in sections, governed by the sources of clean water and suitable
discharge points. The pipe section shall be flushed until the water runs clear.
The contractor is advised that flushing may not create sufficient velocities
to clear the pipeline of matter that may cause an unsatisfactory bacteriological
test. Note that flushing is not a substitute for preventive measures during
construction. Permission of the Town Engineer to stop flushing or directions
to continue flushing shall involve no responsibility for the results of the
bacteriological test.
(2) Procedure for disinfecting. The water injector for introducing
the chlorine-bearing water into the pipe should be supplied from a tap on
the pressure side of the gate valve controlling the flow into the pipeline
extension.
(3) Rate of applications. Water from the existing distribution
system or other source of supply shall be controlled so as to flow slowly
into the newly laid pipeline during the application of chlorine. If the continuous-feed
method permitted in C651 is utilized, the rate of chlorine mixture flow shall
be in such proportion to the rate of water entering the pipe that the chlorine
dose applied to the water entering the newly laid pipe shall produce at least
25 parts per million residual, with a reading of 10 parts per million after
a twenty-four-hour period. If the slug method of C651 is utilized, the rate
of chlorine mixture flow shall be in such proportion that the chlorine dose
applied to the water entering the newly laid pipe shall produce at least 100
parts per million residual. The chlorine shall be applied continuously and
for a sufficient period to develop a solid column or slug of chlorinated water
that will, as it moves through the main, expose all interior surface to a
concentration of approximately 100 milligrams per liter for at least three
hours.
(4) Final flushing and testing. Following chlorination, all
treated water shall be thoroughly flushed from the newly laid pipeline at
its extremities until the replacement water throughout its entire length shall,
upon testing, be proved comparable in quality to the water served the public
from the existing water supply system and as approved by the public health
authority having jurisdiction. Should the initial treatment fail to result
in the conditions specified, the entire procedure shall be repeated until
satisfactory results are obtained. The contractor is responsible to properly
dispose of the chlorinated water. The environment to which the chlorinated
water is to be discharged shall be inspected. If there is any question that
the chlorinated discharge will cause damage to the environment, then a reducing
agent shall be applied to the water to be wasted to neutralize thoroughly
the chlorine residual remaining in the water. Where necessary, state and county
agencies should be contacted to determine special provisions for the disposal
of heavily chlorinated water.
(5) Bacteriological tests. The contractor shall make all
arrangements with the Dutchess County Department of Health office for bacteriological
tests and shall make the tests under its direction, if requested. The contractor
shall furnish all equipment, disinfectants, piping, etc., required for the
test. The pipelines shall be flushed and rechlorinated until satisfactory
bacteriological sampling has been achieved. The contractor shall obtain certificates
of satisfactory bacteriological tests and furnish them to the Town Engineer
before the request is made for acceptance of the work.
(6) The contractor shall furnish all water for flushing,
testing and disinfection. The contractor shall furnish all means and apparatus
for getting the water into the pipelines and shall furnish, install and remove
any additional temporary blowoff piping required to discharge water used for
flushing, testing and disinfecting.
C. Inspection and acceptance of work.
(1) The contractor shall give the Town Engineer reasonable
notice as to the time when he will be prepared to test portions of the work
so that inspection of all testing and disinfection can be scheduled.
(2) Upon completion of work, the contractor will provide
the Town Engineer with three sets of as-built plans of water lines, indicating
valves, fittings and hydrants, with measurements. Upon receipt of this plan,
an inspection of the work area will be made and any deficiencies corrected
by the contractor prior to the Town of Pawling accepting the new line.
No statement in this chapter shall be construed to interfere with any
additional requirements that may be imposed by any federal, state or local
health authority having jurisdiction.