DETAILED SPECIFICATIONS - RECLAIMED WATER-1
DETAILED SPECIFICATIONS - RECLAIMED WATER
INDEX
Paragraph – Number
2-16-1
2-16-2
2-16-3
2-16-4
2-16-5
2-16-6
2-16-7
2-16-8
2-16-9
2-16-10
2-16-11
2-16-12
General
Materials
Installation
Joints
Connections to Existing Reclaimed Water Mains
Setting Valves and Valve Boxes
Highway and Other Jack-and-Bore Crossings
Railroad Crossings
Ditch Crossings
Siltation and Bank Erosion
Corrosive Soils
Field Testing of Reclaimed Water System
Hydrostatic Leak Test Form
DETAILED SPECIFICATIONS - RECLAIMED WATER-2
DETAILED SPECIFICATIONS - RECLAIMED WATER
2-16-1
GENERAL
(a)
Scope
This section of the specifications covers the material and installation
requirements for piping, valves, fittings, specials, crossings, connections,
flushing, and testing. Excavation, trenching, and backfill for the installation
of underground piping systems shall be specified in section on Earthwork.
(b)
Submittals
Three copies of all required test reports shall be submitted to the City
Engineer. These shall include:
•
Certified records of tests on ductile iron pipe made by the
manufacturer or a commercial testing laboratory for each shipment
of pipe. Tests shall be in accord with the procedure outlined in ANSI
Standard A21.51 (AWWA C-151).
•
Certificate by polyvinyl chloride pipe manufacturer that all pipe
furnished meets the requirements of A.W.W.A. C-900; PVC pipe shall
be purple in color or as specified herein.
•
Reports on pressure and leakage tests.
Shop drawings shall be submitted for all valves, valve boxes, and pipeline
restraints.
(c)
2-16-2
Construction of reclaimed water mains shall proceed in a continuous
operation through flushing and pressure testing, unless otherwise permitted
by the City Engineer.
MATERIALS
(a)
All materials will be inspected by the City Engineering inspector prior to
installation. All materials shall be new, manufactured either in the year
that construction begins or the previous year. AWWA or ASTM
Specifications shall be latest issue.
(b)
Ductile Iron Pipe and Fittings
Ductile iron pipe for water main installed underground shall be
manufactured in accordance with AWWA C-151 (ANSI Std. A 21.51). Pipe
shall be designed for thickness in accordance with AWWA C-150 (ANSI Std.
DETAILED SPECIFICATIONS - RECLAIMED WATER-3
A 21.50), subject to the following design criteria: 150 psi water pressure
plus 100 psi surge pressure, Type 2 laying condition, 2 to 1 safety factor,
trench width diameter plus 2 feet, and depth of cover as shown on the
drawings. The depth of cover for reclaimed water mains not shown in
profile shall be a minimum of 3 feet 6 inches, unless otherwise shown on
the drawings. Where ductile iron pipe is threaded for flanges, the thickness
shall be increased to provide for pressures cited above.
The depth of cover for the pipe listed in the preceding paragraph is
specified as a minimum required depth. The pipe manufacturer shall
determine additional wall thickness required where amount of cover
exceeds the minimum requirements.
Pipe shall have cement lining and bituminous seal coat in accordance
with AWWA C-104 (ANSI Std. A 21.4). Pipe shall also be bituminous coated
on the outside. Lining shall be standard thickness.
Joints for ductile iron pipe shall be mechanical or push-on type designed
in accordance with AWWA C-111. Gasket lubricant shall be labeled with
the trade name, pipe manufacturer's name, and shall be stenciled on the
container "For use with reclaimed water system."
Fittings for ductile iron pipe shall be manufactured of ductile iron and shall
conform to the requirements of AWWA C-110 or AWWA C-153. Fittings shall
be designed so as to be compatible with the pipe and so as to provide at
least equal resistance to internal and external loads on the pipe. The
lining and coating of the fittings shall be as specified for the pipe. Joints
for fittings shall be mechanical type for underground service. The joint and
bolts and nuts shall conform to AWWA C-111. All fittings shall be rated for
not less than 150 psi working pressure plus 100 psi surge pressure.
All ductile iron pipe shall be wrapped with an 8-mil thick layer of
polyethlene film, purple in color and conforming to ANSI/AWWA
C105/A21.5.
Purple non-detectable marker tape shall be installed continuously 12"
below finish grade.
Above-ground ductile iron pipe, such as on bridges or separate pipe
supports, shall have a factory-applied exterior coating of a universal
phenolic primer and two field coats of an alkyd enamel (2 mils DFT per
coat), purple in color, as approved by the Engineer.
Primer shall be compatible with field finish; acceptable coating
manufacturers are Tnemec Co., Inc., Porter Paint Co., and Kop-Coat, Inc.
(c)
Polyvinyl Chloride (PVC) Pipe
DETAILED SPECIFICATIONS - RECLAIMED WATER-4
Polyvinyl chloride pipe for reclaimed water mains installed underground,
sizes 4" through 12" shall meet the requirements of AWWA C-900. Pipe shall
be of ductile iron O.D. and shall be Class 150. All fittings 4" and larger shall
be cast iron or ductile iron mechanical joint.
Pipe size under 4" shall conform to ASTM D-2241 for Pressure Rating 200.
Pipe shall be manufactured from clean, virgin, unplasticized polyvinyl
chloride resin, cell classification 12454-A or 12454-B as defined in ASTM
D-1784. All pipe shall bear the National Sanitation Foundation seal for
potable water pipe. Maximum laying length for all PVC water pipe shall
be 20 feet.
Connections for PVC reclaimed water pipe 2" in diameter and larger shall
be rubber compression ring type. The bell shall consist of an integral wall
section with a solid cross-section elastomeric gasket which meets the
requirements of ASTM F-477. The bell section shall be designed to be at
least as strong as the pipe wall.
All PVC reclaimed water pipe shall be purple in color, or bear an
acceptable, indelible purple 2" stripe in three locations for the continuous
length of each pipe section, with the spacing of these markings to be 120°
apart. The words "Reclaimed Water" shall be stenciled within the stripe, if
used, or in three continuous lines on purple pipe, with not more than 12"
separating the repetitions of the words.
Purple detectable marker tape shall be installed continuously 12" below
finish grade.
The use of PVC pipe shall be limited to certain locations, and approval of
the City Engineer and Public Works Water Division is required for its use,
unless otherwise provided for the in the Contract Documents.
(d)
Steel Casing Pipe
Pipe for casings to be jacked and bored under highways shall be steel
conforming to ASTM A139, Grade A. Casing pipe shall be of the length
and size shown on the drawings. The wall thickness shall be standard mil
thickness for the required pipe diameter. Minimum wall thickness shall be
3/8". Casings shall be bulkheaded or sealed at each end to prevent soil or
pavement erosion, and vented to the atmosphere on both ends. All parts
of the casing pipe shall be coated, to a least a 16 mil dry thickness, with
coal tar epoxy equal to Kop-Coat Bitumastic No. 300-M.
DETAILED SPECIFICATIONS - RECLAIMED WATER-5
(e)
Polyethylene Reclaimed Water Service Tubing
Reclaimed water service tubing shall be manufactured from ultra-high
molecular weight polyethylene. It shall meet the requirements of Type III,
Class C, Category 5-P34 polyethylene as defined by ASTM Specifications
D-1248. Tubing shall be designated PE 3408, with a hydrostatic design
stress of 630 psi for water at 73.4°F, be made from all virgin material, bear
the National Sanitation Foundation approval, and shall conform to
product standard ASTM D2737.
(f)
Restraining
Restrained Joints: Restrained joints shall be provided for all buried piping
systems at the location required to resist system thrust. Pipe joints and
fittings shall be restrained as specified below.
1.
Manufactured restrained joints (ductile iron pipe): Manufactured
restrained joints shall be Flex-Ring, Lok-Ring or Lok-Fast
manufactured by the American Cast Iron Pipe Company, Lok-Tyte
or Tr-Flex Type manufactured by the United States Pipe Company or
an equal approved by the Engineer. Joints shall be manufacturer's
standard specifically modified push-on type joints with joint restraint
provided by ductile iron retainer rings joined together by corrosion
resistant, high strength steel tee head bolts and nuts or with joint
restraint provided by a welded-on retainer ring and a split flexible
ring assembled behind the retainer ring. Manufactured restrained
joints shall be capable of deflection during assembly. Deflection
shall not exceed 80 percent of the manufacturer's
recommendations.
Tee head bolts and nuts for restrained joints shall be manufactured
of CORTEN, high strength, low alloy, corrosion resistant steel as
manufactured by NSS Industries, Plymouth, Michigan, or an equal
approved by the Engineer.
Joints shall be fully extended (i.e., all slack taken up) during
installation.
2.
Restrained joints for field-cut ductile iron pipe: When prior approval
is obtained from the Engineer, fittings and push-on ductile iron pipe
may be restrained using a follower gland which includes a
restraining mechanism. When actuated during installation, the
restraining device shall impart multiple wedging action against the
pipe wall which increases resistance as internal pressure in the
pipeline increases.
DETAILED SPECIFICATIONS - RECLAIMED WATER-6
The joint shall maintain flexibility after installation. Glands shall be
manufactured of ductile iron conforming to ASTM A536 and
restraining devices shall be of heat treated ductile iron with a
minimum hardness of 370 BHN. The gland shall have standard
dimension and bolting patterns for mechanical joints conforming to
ANSI/AWWA C111 and C153, latest revisions.
Tee head bolts and nuts shall be manufactured of corrosion
resistant, high strength, low alloy CORTEN steel in accordance with
ASTM A242.
The restraining wedges shall have twists-off nuts to insure proper
torquing. The mechanical joint restraint device shall have a
minimum working pressure rating of 250 psi with a minimum safety
factor of 2 to 1 and shall be MEGALUG as manufactured by EBBA
Iron, Inc. No other retainer gland type device will be acceptable.
After installation prior to backfilling, all parts of the joint restraint
system shall be coated, to a least a 16 mil dry thickness, with coal
tar epoxy equal to Kop-Coat Bitumastic No. 300-M.
3.
PVC pipe bell and spigot joints shall be restrained with the EBBA Iron
Series 1500 or 6500 Restrainer or an equal approved by the
Engineer. The restraining device and Tee head bolts shall be
manufactured of high strength ductile iron meeting ASTM A536,
Grade 65-42-10. Clamping bolts and nuts shall be manufactured of
corrosion resistant high strength, low alloy CORTEN steel meeting the
requirements of ASTM A242. Cast iron mechanical joint fittings used
with PVC pipe shall be restrained with the EBBA Iron Series 2000 PV
Restrainer or an equal approved by the Engineer. The restraining
device and Tee head bolts shall be manufactured of high strength
ductile iron meeting ASTM A536, Grade 65-42-10.
Clamping bolts and nuts shall be manufactured of corrosion
resistant high strength, low alloy CORTEN steel meeting the
requirements of ASTM A242.
4.
When prior approval is obtained from the Engineer, ductile iron and
PVC pipe, fittings, and valves may be restrained using tie bolt joint
restraint. Joint restraint materials for this method of restraint shall be
the Super-Star SST Series Joint Restraint System as manufactured by
Star National Products, a Division of Star Industries, Inc., Columbus,
Ohio, or an equal approved by the Engineer.
All bolts, nuts, washers, tie rods and other fasteners for the joint
restraint system shall be manufactured of CORTEN high strength, low
alloy, corrosion resistant steel in conformance with ASTM A242. Tie
bolts shall be manufactured of heat treated CORTEN steel. Tie rods
DETAILED SPECIFICATIONS - RECLAIMED WATER-7
and all fasteners for the system shall be galvanized in conformance
with the requirements of ASTM A123. Tie rods shall have a minimum
diameter of 3/4-inch. The number of tie rods required per joint shall
be as recommended by the manufacturer.
Prior to backfilling after installation, all parts of the joint restraint
system shall be coated with coal tar epoxy equal to Kop-Coat
Bitumastic No. 300-M, for a minimum dry film thickness of 16 mils.
5.
(g)
For all pipes 12" and smaller, joints may be restrained using thrust
blocks, unless restrained joints are called for on the drawings. See
drawings for thrust block details.
Gate Valves
Gate valves shall be designed for a working pressure of not less than 150
psi, of a resilient seat wedge type, and when fully open, have a clean
waterway equal to the nominal diameter of the pipe. The valve shall open
by turning to the left or counterclockwise when viewed from the stem. The
operating nut shall have an arrow cast in the metal indicating the
direction of opening. Each valve shall have the manufacturer's distinctive
marking, pressure rating, and year of manufacture cast on the body. Prior
to shipment from the factory, each valve shall be tested by applying to it a
hydraulic pressure equal to twice the specified working pressure.
Valves 3" and larger shall be iron body, fully bronze mounted, resilient seat
valves and shall conform to the specifications for Gate Valves for Ordinary
Water Works Service, AWWA C-500 and C-509 and shall be fitted with an
O-ring seal of standard manufacture. Valves to be located underground
shall be non-rising stem type designed for buried service with a two-inch
square operating nut. The valves shall have mechanical joint connections.
Valves to be used above ground shall have outside screw and yoke
operation, handwheels and standard flanged ends in accordance with
AWWA C-110.
Valves two inches (2") and smaller shall be all brass, ball valve curb stop
type and shall conform to AWWA standards and ASTM B62 Index 115-85-5-5-5.
(h)
Butterfly Valves
Butterfly valves shall be cast iron body, rubber seated, tight closure, direct
burial, and shall conform in all respects to AWWA Standard, C 504, Class
150B. Valve disc shall rotate 90° from full open position, to the right shut
position. Equipment must be of the latest models, and must be
cataloged, manufactured, and in service for more than five years, and be
DETAILED SPECIFICATIONS - RECLAIMED WATER-8
satisfactory for applications involving valve operations after long periods of
inactivity.
VALVE BODIES AND ENDS: Valve bodies shall be constructed of cast iron
conforming to ASTM 126, Grade B. Valves shall have integrally cast mechanical
joint ends and shall be furnished with mechanical joint accessories. Valves to be
coated with AWWA asphalt varnish.
VALVE SHAFTS: Valve shafts shall be constructed of type 304 stainless steel and
be of a one-piece unit extending completely through the valve disc. Valve shaft
seals shall be designed for standard "O" Ring Seals or Vee type packing.
VALVE DISC: Valve disc shall be of Ni-Resist, Type 1, or ductile iron conforming to
ASTM A 536, Grade 65-45-12.
VALVE SEATS: Valve seats shall be designed for Class 150B, be of synthetic or
new natural rubber and shall be either disc mounted and clamped or bonded
to the valve body according to ASTM D 429, method B. The mating seat surface
shall be constructed of Type 304 stainless steel integrally cast into the valve body
or disc.
VALVE OPERATORS: Operators shall be designed for buried service and shall be
of the traveling nut, self-locking type, and shall close with a clockwise rotation of
the two inch (2") square AWWA nut. Manufacturer's certified copies of required
operator torque tests shall be furnished by supplier.
TESTING: Testing shall be done in all respects to conform to AWWA C504, latest
revision. The manufacturer shall furnish certified copies of the reports covering
these tests.
AFFIDAVIT OF COMPLIANCE: An affidavit from the manufacturer that the valves
furnished comply with all applicable provisions of AWWA C 504 shall be furnished
by the Contractor.
(i)
Cast Iron Valve Boxes
Cast iron valve boxes shall be provided for all valves which are below
finished grade elevations. Valve boxes shall consist of cast iron base and
adjustable cast iron top section with cover which shall be marked
"RECLAIMED WATER."
(j)
Tapping Saddles and Tapping Valves Resilient Seat
Cast iron or steel fabricated tapping saddles and cast iron valves shall be
used to make "wet" taps into the existing reclaimed water mains where
shown on the drawings. Saddle bodies must be of carbon steel in
accordance with ASTM A-285, Grade C. The flanges must conform to
AWWA C-207 Class D ANSI 150# drilling. All bolts must conform to AWWA
DETAILED SPECIFICATIONS - RECLAIMED WATER-9
C-111. The tapping saddle must have a tap connection for pressure
testing. Contractor shall verify type of existing main before ordering
saddle. The tapping valve shall have an inlet flange to match the saddle
and a mechanical joint outlet for connection to water main pipe. Tapping
valve shall be rated for 150 psi working pressure, open counterclockwise
with non-rising stem, and have O-ring seals. The saddle shall be pressure
tested at 150 psi prior to tapping.
(k)
Corporation Stops and Service Clamps
Corporation stops shall be Ford Meter Box Co. Type F-1000, CC/LP, or
approved equal with inlet having AWWA tapered threads and outlet for
polyethylene or copper tubing with stainless steel insert stiffener.
Service clamps for PVC mains shall be full circle bearing type, and for
ductile iron mains service clamps shall be the double-strap tapped saddle
tap.
(l)
Curb Stops
Curb stops shall be ball valves, Ford No. B41, L.P./I.P., or approved equal.
(m)
Protection Tape
All reclaimed water mains shall have protection tape installed
continuously along the alignment. The protection tape shall be installed
during backfilling 12" above and directly over the pipe and be
continuously marked "Caution, Reclaimed Water Main Buried Below". All
protection tape shall be Terra-Tape, or approved equal.
2-16-3
INSTALLATION
(a)
Pipe and fittings for the reclaimed water main shall be strung out along the
route of construction with the bells pointing in the direction of construction.
Pipe shall be placed where it will cause least interference with traffic.
Pipe shall be handled by mechanical equipment. Before the pipe is
lowered into the trench, it shall be swabbed or brushed out to insure that
no dirt or foreign material gets into the finished line. Trench waters shall be
kept out of the pipe and the pipe kept closed by means of a test plug
whenever work is not in progress. The Contractor shall provide the means
for dewatering the trench, and the cost thereof shall be included in the
price for installing the pipe.
(b)
Deflections from a straight line or grade made necessary by vertical
curves or horizontal curves or offsets shall not exceed the manufacturer's
recommendations. If the specified or required alignment requires
deflections in excess of those recommended, the Contractor shall either
provide special bends as approved by the City Engineer or a sufficient
DETAILED SPECIFICATIONS - RECLAIMED WATER-10
(c)
number of shorter lengths of pipe to provide angular deflections within the
required limit.
Pipe shall be laid in a level trench. Irregularities shall be smoothed out or
filled in with sand and tamped. Holes shall be scooped out where the
joints occur leaving the entire barrel of the pipe bearing on the pipe bed.
Backfilling and earth cover shall conform to the requirements specified in
the section on Earthwork.
(d)
Laying of the pipe shall be commenced immediately after the excavation
is started, and every means must be used to keep pipe laying closely
behind the trenching. The City Engineer may stop the trenching when, in
his opinion, the trench is open too far in advance of the pipe laying
operation. Pipe may be laid in the best manner adapted to securing
speed and good results. The method shall, however, be in accordance
with the manufacturer's instructions and recommendations. Damaged or
unsound pipe or fittings will be rejected. Before jointing the pipe all lumps,
blisters, excess coating material, or oil shall be removed from the bell and
spigot ends of pipes. At any point in the system shown on the drawings or
as ordered by the City Engineer, the Contractor shall construct concrete
encasements under and around the pipe. This encasement shall be of
3,000 psi P.C. concrete.
(e)
Thrust blocks shall be installed on all fittings 12" and smaller, as shown in
details of typical thrust block placements on the drawings. Where thrust
blocking is not practical and the Contractor elects to provide restraining
apparatus in lieu of thrust blocks, or as directed by the City Engineer or as
indicated on the plans, restraining apparatus details for any type of pipe
shall be submitted for approval of the City Engineer in accordance with
the restraining section of these specifications.
Concrete used for thrust blocking shall have a minimum compressive
strength of 3,000 psi at 28 days. A schedule and details for the required
thrust blocks are included on the Standard Details. All precast thrust
blocks shall have a separate lifting handles.
Both concrete thrust blocks and restrained joints or tie rods must be used
when, in the judgment of the Engineer, the nature and criticality of an
installation is such as to require positive assurance of stability.
Areas where thrust blocks are to be placed shall be hand excavated.
Excavation for the thrust blocks shall be completed following installation of
the pipe and fitting to be restrained. For thrust blocks, hand excavate to
undisturbed soil and to the sizes and configurations shown on Drawings.
Use extreme care following excavation not to disturb soil in the thrust block
area, prior to pouring concrete.
DETAILED SPECIFICATIONS - RECLAIMED WATER-11
Each fitting and pipe shall be wrapped with 8 mil thick polyethylene prior
to pouring concrete, so that no concrete comes in direct contact with the
surface of the fitting or pipe. Concrete shall cure a minimum of 7 days prior
to putting the line under pressure. The Contractor shall not backfill around
thrust blocks until approval is obtained from the Engineer.
2-16-4
(f)
Where there is no adequate natural foundation upon which to construct a
pipe bed, the pipe shall be constructed on a prepared stabilized
subgrade or rock bedding. Unsuitable subgrade materials shall be
replaced or stabilized as described. Gravel or graded limerock used for
pipe bedding, when ordered in writing, shall be paid for under the bid
item for such material.
(g)
Installation of reclaimed water mains shall be in strict conformance with
the latest AWWA Specifications.
(h)
For the protection of exposed reinforcing in anchor blocks, the Contractor
shall furnish and apply two coats of protective material as specified by the
City Engineer.
(i)
The Contractor shall bore new reclaimed water services under existing
pavement where the reclaimed main is beyond the centerline of the
existing pavement from the intended point of service, unless otherwise
directed by the Engineer or shown on the drawings. The method of
installation shall include boring or pushing, such as
"Flow-Mole",
"Pow-R-Mole", "Allied Holehog" or approved equal. Water jetting and
open cutting will not be permitted.
JOINTS
All joints shall be watertight, and any leaks or defects discovered shall be
immediately repaired to the satisfaction of the City Engineer. Any pipe which has
been disturbed after being laid shall be taken up, the joints cleaned, and the pipe
properly relaid and reconnected to the reclaimed water system. Any superfluous
material inside the pipe shall be flushed or removed by means of an approved
follower or scraper after joints are made. Installation of fittings and pipe joints shall
be in strict accordance with the manufacturer's recommendations.
2-16-5
CONNECTIONS TO EXISTING RECLAIMED WATER MAINS
Where connections are required to be made between new mains and existing
reclaimed water mains the connections shall be made in a thorough and
workmanlike manner using proper materials, fittings and labor practices to suit the
actual conditions. In case a connection is made to an existing fitting in the line, the
Contractor will schedule his work so that digging and locating this existing fitting can
be completed prior to starting trench work on the line. Cut-ins into lines shall be
done at a time approved in writing by the City Engineer. Whenever it is required to
DETAILED SPECIFICATIONS - RECLAIMED WATER-12
turn off valves which may interrupt the reclaimed water supply of residents or
businesses, the Contractor shall notify all concerned parties or agencies at least
twenty-four hours in advance to such cut-off and after having obtained the
approval of the City Engineer. The Contractor shall minimize the interruption of
reclaimed water service to existing connections during construction.
2-16-6
SETTING VALVES AND VALVE BOXES
Before installing any valve, care shall be taken to see that all foreign material is
removed from the interior of the body and the valve opened and closed to see that
all parts are in proper working condition. Valves shall be set plumb with valve boxes
placed directly over the operators. After being correctly positioned, fill shall be
carefully tamped around the valve box for a distance of four feet on all sides of the
box. In unpaved areas, a concrete pad shall be poured around the top of the box
as shown in the standard details. Finished grades are to be approved by the City
Engineer.
2-16-7
HIGHWAY AND OTHER JACK-AND-BORE CROSSINGS
The Owner will obtain permits for FDOT and Pinellas County highway crossings, and
the Contractor shall comply with all permit requirements and with the FDOT Utility
Accommodation Guide, latest issue. The crossings for reclaimed water mains shall
be made in the locations and to the limits shown unless otherwise directed by the
City Engineer. The casing pipes or sleeves shall be 3/8 inch minimum wall thickness
steel conforming to the Florida Department of Transportation requirements and shall
be jacked and bored beneath the road area.
The Contractor shall be responsible for any and all expense the DOT will incur in
protecting its highway while the pipes are being placed thereunder. The Contractor
must stand all responsibility for all damage to said highway while the pipes are
being installed. He shall contact the Florida Department of Transportation for any
modifications and/or additions to the above-listed requirements and shall arrange
with DOT for the proper bracing, sheeting, shoring, or other necessary protection of
the right-of-way before excavation of a jacking pit or boring beneath the highway.
The Contractor shall secure from DOT the necessary information regarding proper
protection of the highway and traffic during the construction operation. The casing
pipe shall be sealed and vented.
2-16-8
RAILROAD CROSSINGS
The Owner will obtain permits for railroad crossings, and the Contractor shall comply
with all permit requirements. The railroad crossing for reclaimed water mains shall
be made in the locations and to the limits shown, unless otherwise directed by the
City Engineer. The casing pipes or sleeves shall be 3/8 inch minimum wall thickness
steel conforming to the railroad company's requirements and shall be jacked and
bored beneath the track area.
DETAILED SPECIFICATIONS - RECLAIMED WATER-13
The Contractor shall be responsible for any and all expense the railroad company
will incur in protecting its tracks while the pipes are being placed thereunder. The
Contractor must stand all responsibility for all damage incurred while the pipes are
being installed. He shall contact the railroad company or track owner for any
modifications and/or additions to the above listed requirements and shall arrange
with said company for the proper bracing, sheeting, shoring, or other necessary
protection of the tracks before excavation in their property or boring beneath the
tracks. The casing pipe shall be sealed and vented.
2-16-9
DITCH CROSSINGS
(a)
Permits
The Owner will obtain the necessary construction permits from the
governing authorities. The Contractor shall not begin work on any ditch
crossing until he receives a copy of the approved permit. The work shall
be subject to any additional requirements of the permitting authority.
(b)
Crossings
Ditch crossings shall be constructed in the locations and according to the
details shown on the drawings. Pipe, fittings, and connections shall be of
the sizes and type shown on the drawings or as specified. Ductile iron pipe
and fittings shall conform to the specifications for the pipe and fittings as
contained herein.
(c)
Restoration
Ditch banks and bottoms shall be restored to the original condition and
approved by the City Engineer. Where it is necessary for a reclaimed
water main to be constructed below the bottom of an existing ditch or
channel a concrete protective pad will be required over the water main
with the size and thickness of the pad to be determined by the City
Engineer, unless otherwise indicated on the drawings.
(d)
Protection
In ditch or canal crossings, all joints shall be restrained and the pipe and
fittings shall be wrapped with 8 mil thick polyethylene.
2-16-10
SILTATION AND BANK EROSION
The Contractor shall take necessary precautions to minimize siltation and bank
erosion in crossing canals or ditches, in discharging well point systems, or during
other construction activities.
DETAILED SPECIFICATIONS - RECLAIMED WATER-14
2-16-11
CORROSIVE SOILS
In corrosive soils (i.e., dump areas, swamps, marshes, alkaline soils, cinder beds,
etc.), ductile iron pipe shall be protected by encasing it in a polyethylene wrap (8
mil thick) where called for on the drawings or where directed by the City Engineer.
Poly wrap to be installed in accordance with AWWA C-105, and shall be purple in
color.
2-16-12
FIELD TESTING OF RECLAIMED WATER SYSTEM
(a)
All new piping shall be thoroughly flushed prior to pressure testing.
Contractor shall furnish all temporary facilities, including fittings, pipe,
valves and appurtenances necessary for flushing the system, and remove
same when complete, all without additional compensation. Clean water
shall be flushed through the system at a minimum velocity of 3 feet per
second for a minimum of 15 minutes per 1,000 feet of pipe or until no trace
of cuttings, lead, oil, dirt, or other foreign matter is visible. Water shall be
disposed of appropriately. No more than 1,000 feet of pipeline shall be
flushed and tested at any only time, unless otherwise approved by the City
Engineer.
All restrained joints shall be fully extended (i.e., all slack taken up) before
testing.
(b)
The Contractor shall furnish and install suitable temporary testing plugs or
caps for the pipe, all necessary pressure pumps, hose, pipe connections,
meters, gauges, and other similar equipment, and all labor required, all
without additional compensation, for conducting pressure and leakage
tests of the new reclaimed water lines. Tests shall be made between
valves and as far as practical in sections as approved by the City
Engineer. Reclaimed water from an existing reclaimed water distribution
system shall be used. If reclaimed water is not available, potable water
may be used, but not from a directly connected potable system.
The test pressure for the reclaimed water lines shall be 150 psi, and this
pressure shall be maintained for a period of not less than two hours for
uncovered pipes, and for not less than 24 hours for pipes which have been
backfilled before tests are made. The amount of water forced into the line
during this time shall be determined and this amount shall be taken as a
basis to compute the leakage for 24 hours. Pressure shall not vary more
than 2 psi from the above during the test periods. Allowable leakage shall
be computed on the basis of AWWA Standard C600.
The trench for pipe containing restrained joints shall be completely
backfilled and compacted before testing.
(c)
All leaks evident at the surface shall be uncovered and repaired,
regardless of the total leakage as indicated by the test, and all pipes,
DETAILED SPECIFICATIONS - RECLAIMED WATER-15
valves, and fittings and other materials found defective under the test shall
be removed and replaced at the Contractor's expense. Tests shall be
repeated until leakage has been reduced below the allowable amount.
DETAILED SPECIFICATIONS - RECLAIMED WATER-16
HYDROSTATIC LEAKAGE TEST FORM
PINELLAS PARK, FLORIDA
ENGINEER:
_________________________________________
CONTRACTOR:
_________________________________________
SECTION
DATE
DIAMETER
LENGTH
NUMBER
TEST
LEAKAGE
GPH
GPH
ACCEPTED
TESTED
OF TEST
(INCHES)
(FEET)
OF JOINTS
PRESSURE
ALLOWANCE
ALLOWANCE
ACTUAL
YES OR NO
PSI (AVERAGE)
TEST WITNESSED BY:
FOR ENGINEER
FOR CONTRACTOR
________________________________________
Name
________________________________________
Name
________________________________________
Title
________________________________________
Title