No construction of any part of the tap-in, the
building sewer, the lateral, additions to the sewer system or any
construction, renovation, or change in use of a property, lot, project,
development or building shall commence until the property owner has
made application for a sewer construction permit in the manner provided
within and until such permit has been duly issued. The application
for tap-in to the sewer system shall be submitted on the official
form, and must be completely filled out. Forms may be secured at the
Borough office.
The application herein before referred to in §
87-8 shall be accompanied by the proper plan review fee as provided for in the current schedule of fees, and complete plans, specifications and a description of the work to be done. At a minimum, the plans shall show the location of all new waste lines, cleanouts, traps, and adapters; all waste lines with their direction and slope that are affected by, or tap-in with, this installation; the location of the tap-in with the lateral together with the depth of such tap-in below finished grade. The plans must also indicate the point of discharge of all roof drains, downspouts, floor drains and sump pumps. If, in the course of work, it is found necessary to make any change from the approved plans and specifications on which a permit had been issued, amended plans and specifications shall be submitted and, if approved, a supplementary permit shall be issued to cover the change after the same conditions required to secure the original permit have been satisfied.
Upon receipt and approval of a properly executed
application to construct, and after receipt of the tap-in fees, the
Borough shall issue a sewer construction permit to the property owner
for tap-in to said sewer. No permit will be issued until and unless
the sewers are the property of the Authority or an agreement to accept
sewage flows is executed. An agreement to accept sewage shall only
be applicable to those facilities intended to be dedicated at a later
date.
The applicant shall secure a digging permit
or arrange for said permit from the proper issuing entity before opening
any road. The applicant for any road-opening permit within the Borough
shall provide a reasonable bond to cover the work. Any and all requirements
for excavating in a public road shall be met and satisfied in accordance
with the said permit at the expense of the applicant, including proper
restoration of the road after installation of any sewer or tap-in.
Testing procedures shall be as set forth below.
A. Description. The work of this section includes, but
is not limited to:
(1) Testing gravity sewer pipelines:
(2) Testing pressure pipelines:
(a)
Hydrostatic leakage test.
(3) Deflection testing of plastic pipe.
(4) Testing manholes:
(b)
Tap-in to existing manhole hydrostatic test/or
vacuum test.
(5) Testing laterals:
(a)
Hydrostatic leakage test.
B. Quality assurance; test acceptance:
(1) All infiltration and exfiltration tests in sanitary
sewer lines and manholes shall be performed by the developer and monitored
by a representative of the Borough at the expense of the developer.
(2) No test will be accepted until the results are below
the specified maximum limits.
(3) The contractor shall, at his/her own expense, determine
and correct the causes of test failure and retest until successful
test results are achieved.
C. Submittals to be furnished by the applicant prior
to commencement of testing:
(3) Testing sequence schedule.
(4) Provisions for disposal of flushing and test water.
(5) Certificate of test gauge calibration.
(6) Deflection mandrel drawings and calculations.
D. Testing equipment.
(1) Air test equipment:
(h)
Pressure gauge, calibrated to 0.1 psi.
(2) Infiltration test equipment:
(3) Hydrostatic test equipment:
(e)
Pressure gauge, calibrated to 0.1 psi.
(4) Deflection test equipment:
E. Execution; preparation.
(1) Backfill trenches in accordance with the Pen Argyl
Borough Sewage Procedures Manual, local and state regulations, or
the manufacturers recommendations, whichever is more stringent.
(2) Thrust blocks shall be provided for all pressure sewers
at all bends, valves and connections or as required by the engineer.
(3) Flush pipeline to remove debris. Collect flushing
water and debris in the closest downstream manhole.
(4) Clean pipelines by high-pressure jetting through the
pipeline with water from the downstream manhole to the upstream manhole
to the satisfaction of the Borough's representative. Vacuum and dispose
of cleaning water and debris in a proper manner.
(5) Lamping:
(a)
After flushing and cleaning, lamp gravity pipeline.
(b)
The contractor shall assist the Borough's representative
in the lamping operation by shining a light at one end of each pipeline
section between manholes. The Borough's representative will observe
the light at the other end. Pipeline that has not been installed with
uniform line and grade will be rejected. Remove and re-lay rejected
pipeline sections. Reclean and lamp until pipeline section achieves
a uniform line and grade to the satisfaction of the Borough's representative.
(6) Plug outlets, wye-branches and laterals. Brace plugs
to offset thrust.
F. Testing gravity sewer pipelines.
(1) Low-pressure air test:
(a)
Test each newly installed section of gravity
sewer line between manholes.
(b)
Slowly introduce air pressure to approximately
4.0 psig. If groundwater is present, determine its elevation above
the springline of the pipe by means of a piezometric tube. For every
foot of groundwater above the springline of the pipe, increase the
starting air test pressure reading by 0.43 psig. Do not increase pressure
above 9 psig.
(c)
Allow pressure to stabilize for at least five
minutes. Adjust pressure to 3.5 psig or the increased test pressure
as determined above if groundwater is present. Start the test.
(d)
Test:
[1]
Determine the test duration for a sewer section
with a single pipe size from the table below:
|
Low Pressure Air Test - Test Times
|
---|
|
Nominal Pipe Size
|
T (Time) Minute per 100 feet
|
---|
|
4
|
.3
|
|
6
|
.7
|
|
8
|
1.2
|
|
10
|
1.5
|
|
12
|
1.8
|
|
15
|
2.1
|
|
18
|
2.4
|
[2]
Record the drop in pressure during the test
period. If the air pressure has dropped more than 1.0 psig during
the test period, the line is presumed to have failed. If the 1.0 psig
air pressure drop has not occurred during the test period, the test
shall be discontinued and the line will be accepted.
[3]
If the line fails, the contractor shall determine
the source of the air leakage, make corrections and retest. After
the leaks are repaired, retest the entire section between manholes.
(2) Infiltration test:
(a)
Use only when gravity pipeline is submerged
in groundwater. Obtain prior approval of the Borough Engineer.
(b)
Maximum allowable infiltration: 100 gallons
per inch of pipe diameter per mile per day for any one section under
test, including the allowances for leakage from manholes.
G. Testing pressure sewer pipelines; hydrostatic leakage
test.
(1) Test each newly laid pressure pipeline, including
any valved section thereof, hydrostatically at 1.5 times the working
pressure of the pipeline based on the elevation of the lowest point
in the pipeline corrected to the elevation of the test gauge. Obtain
test pressure from the Borough representative.
(2) Slowly fill the section to be tested with water, expelling
air from the pipeline at the high points. Install corporation stops
at high points if necessary. After all air is expelled, close air
vents and corporation stops and raise the pressure to the specified
test pressure.
(3) Observe joints, fittings and valves under test. Remove
and replace all cracked pipes, joints fittings, and valves showing
visible leakage. Retest.
(4) After visible deficiencies are corrected. Continue
testing at the same test pressure for an additional two hours to determine
the leakage rate. Maintain pressure within plus or minus 5.0 psi of
test pressure. Leakage is defined as the quantity of water supplied
to the pipeline necessary to maintain test pressure during the period
of the test.
(5) Formula for computing leakage.
(a)
Compute the maximum allowable leakage by the
following formula:
|
|
Where:
|
|
|
L is the allowable leakage in gallons per hour.
|
|
|
N is the number of joints in the section tested.
|
|
|
D is the nominal diameter of the pipe in inches.
|
|
|
P is the average test pressure in psig.
|
(b)
If the line under test contains sections of
various diameters, the allowable leakage shall be the sum of the computed
leakage for each size. Leakage valves determined by the above formula
are found in Table II, Allowable Leakage for Pipe Systems in U.S.
Gallons Per Hour.
|
Table II
|
---|
|
Allowable Leakage for Pressure Pipe Systems
in U.S. Gallons Per Hour
|
---|
|
Allowable Leakage for 1,000 Feet or 50
Joints
|
---|
|
|
Average Pressure in Line (p.s.i.)
|
---|
|
Nominal
Pipe Size
|
50
|
100
|
150
|
200
|
250
|
---|
|
4
|
.19
|
.27
|
.33
|
.38
|
.43
|
|
6
|
.29
|
.41
|
.50
|
.57
|
.64
|
|
8
|
.38
|
.54
|
.66
|
.76
|
.85
|
|
10
|
.48
|
.68
|
.83
|
.96
|
1.07
|
|
12
|
.57
|
.81
|
.99
|
1.15
|
1.28
|
|
14
|
.67
|
.95
|
1.16
|
1.34
|
1.50
|
|
16
|
.76
|
1.08
|
1.32
|
1.53
|
1.71
|
|
18
|
.86
|
1.22
|
1.49
|
1.72
|
1.92
|
|
20
|
.96
|
1.35
|
1.66
|
1.91
|
2.14
|
|
24
|
1.15
|
1.62
|
1.99
|
2.29
|
2.56
|
|
30
|
1.43
|
2.03
|
2.48
|
2.87
|
3.21
|
|
36
|
1.72
|
2.43
|
2.98
|
3.44
|
3.85
|
(6) If the test of the pipe indicates leakage greater
than the allowable, the contractor shall, at his/her own expense,
locate the source of the leakage, make corrections and retest until
leakage is within allowable limits. All visible leaks shall be corrected
regardless of the amount of leakage.
H. Deflection testing of plastic sewer pipe.
(1) After the PVC pipe has been installed for a period
of at least 90 days, the trench backfilled and tamped to original
ground, the pipe tested for watertightness, the contractor, at his/her
own expense, may be required to perform a field test to demonstrate
that all PVC pipe, six-inch diameter or greater, has not deflected
beyond 5% of the diameter of the pipe. The test shall be witnessed
and approved by the Borough representative.
(2) The maximum allowable deflection for installed PVC
shall be limited to 5% of the original internal diameter.
(3) Perform deflection testing with a deflectometer, calibrated
television, or a properly sized go/no-go mandrel. The mandrel(s) shall
be constructed at the contractor's expense and subject to the approval
of the Borough representative.
(4) Pipe exceeding the allowable deflection shall be located,
excavated, replaced, and retested at the sole expense of the contractor.
I. Testing manholes.
(1) General.
(a)
After the sewers and manholes have been installed
and completely backfilled, the manholes shall be tested for leakage.
(b)
New manhole vacuum test. All lines entering
and leaving each manhole shall be plugged and plugs securely braced
to prevent the vacuum from pulling the plugs out of the pipe. The
vacuum test shall be performed after the frame and cover are installed.
Lift holes shall be plugged with a nonshrinking mortar. The contractor
shall provide all necessary hardware to perform the vacuum test as
manufactured by NPC Systems, Inc., Milford, NH, or equal. With the
vacuum-testing equipment in place proceed with the following:
[1]
Inflate the compression band to effect a seal
between the vacuum base and the manhole.
[2]
Connect the vacuum pump to the outlet port with
the valve open.
[3]
Draw a vacuum of 10 inches of Hg.
[4]
Close the valve and disconnect vacuum pump.
(2) A manhole will be considered acceptable if it takes
more than the following time for the vacuum to drop from 10 inches
of Hg to nine inches of Hg, regardless of depth, in the presence of
the Sewer Department representative or the Borough Engineer or the
Plumbing Inspector.
(a)
Sixty seconds for a forty-eight-inch diameter
manhole.
(b)
Seventy-five seconds for a sixty-inch diameter
manhole.
(c)
Ninety seconds for a seventy-two-inch diameter
manhole.
(3) Connection to existing manhole shall be tested by
hydrostatic test or vacuum test.
(a)
Vacuum test:
[1]
Prior to modification of manhole, all lines
entering and leaving each manhole shall be plugged and plugs securely
braced to prevent the vacuum from pulling any plugs out of the pipe.
Provide all the necessary hardware to perform the vacuum test as manufactured
by NPC Systems, Inc., Milford, NH, or equal. With the vacuum-testing
equipment in place, proceed with the following:
[a] Inflate the compression band to
effect a seal between the vacuum base and the manhole.
[b] Connect the vacuum pump to the
outlet port with the valve open.
[c] Draw a vacuum of 10 inches of Hg.
[d] Close valve and disconnect vacuum
pump.
[2]
Record time in seconds it takes for the vacuum
to drop from 10 inches of Hg to nine inches of Hg regardless of depth.
The test can be stopped if it takes more than the following time for
the vacuum to drop from 10 inches Hg to nine inches Hg, regardless
of depth:
[a] Sixty seconds for a forty-eight-inch
diameter manhole.
[b] Seventy-five seconds for a sixty-inch
diameter manhole.
[c] Ninety seconds for a seventy-two-inch
diameter manhole.
[3]
After modification or connection to the existing manhole has been made, repeat the test outlined in Subsection
I(3)(a)[1] and
[2]. The test will be considered acceptable if the time recorded on the second vacuum test is the same or more than the result of the first vacuum test.
(b)
Hydrostatic test.
[1]
Prior to modification of manhole, all lines
entering and leaving each manhole shall be plugged. Those manholes,
which are constructed in a high-groundwater-table location will be
allowed to remain plugged for a period of not less than four hours,
after which the quantity of inward leakage accumulation will be measured
by bailing and measuring and/or computation against depth of water
and diameter of the manhole. Those manholes constructed above the
groundwater table will be filled with water to the top of the cast-iron
frame and allowed to stand until the walls are well soaked. The manhole
shall be then refilled to the full or overflow point and remain undisturbed
for a period of not less than four hours. The loss of water shall
be measured by refilling to the top with a premeasured quantity of
water and/or computation against depth of water loss and diameter
of the manhole.
[2]
Gain or loss by the respective methods shall
not exceed the following:
[a] 0.02 gallon per hour, per vertical
foot of depth in top section.
[b] 0.03 gallon per hour, per vertical
foot of depth in cone section.
[c] 0.04 gallon per hour, per vertical
foot of depth in a four-foot diameter barrel section.
[d] 0.05 gallon per hour, per vertical
foot of depth in a five-foot diameter barrel section.
[e] 0.06 gallon per hour, per vertical
foot of depth in a six-foot diameter barrel section.
[f] 0.07 gallon per hour, per vertical
foot of depth in a seven-foot diameter barrel section.
[g] 0.08 gallon per hour, per vertical
foot of depth in an eight-foot diameter barrel section.
[3]
After modification or connection to the existing manhole has been made, repeat the test outlined in Subsection
I(3)(b)[1] and
[2]. The test will be considered acceptable if the gain or loss on the second hydrostatic test is the same or less than the result of the first hydrostatic test.
J. Testing laterals.
(1) Hydrostatic leakage test.
(a)
After the lateral has been installed, the lateral
shall be tested for leakage.
(b)
Plug the test tee using an air plug.
(c)
Fill the lateral with water to the brim of the
building clean-out riser next to the building.
(d)
After one-half hour of stabilization, refill
lateral with water to brim of clean-out riser.
(e)
After one hour, if there is no drop in water,
the hydrostatic test passes. If there is a drop in water, the contractor
shall find the leak, repair the leak and retest the lateral.