[HISTORY: Adopted by the Board of Commissioners of the City
of Margate City 11-19-2020 by Ord. No. 11-2020. Amendments noted
where applicable.]
As used in this chapter, the following terms shall have the
meanings indicated:
Earth borne oscillations occurring in discrete pulses at
less than 60 per minute.
Continuous earth borne oscillations. Discrete pulses occurring
60 or more times per minute are usually considered steady-state vibrations.
A.
Vibration, as used in these performance standards, refers to ground-transmitted
oscillations. They shall be measured with a seismograph or complement
of instruments capable of recording vibration displacement and frequency
particle velocity or acceleration simultaneously in three mutually
perpendicular directions.
B.
Maximum permitted vibration levels. Table I designates the applicable
columns of Table II that apply on or beyond adjacent lot lines within
the zone and on or beyond appropriate district boundaries. Vibration
shall not exceed the maximum permitted particle velocities of Table
II. Readings may be made at points of maximum vibration intensity.
|
Table I
| ||
|---|---|---|
|
District
|
Adjacent Lot Line (within zone)
|
Adjacent Lot Line
(If Adjacent Lot Has an Historic Structure)
|
|
Historic
|
B
|
A
|
|
All Others
|
C
|
A
|
|
Table II
Maximum Peak
Particle Velocity
(inches/second)
| |||
|---|---|---|---|
|
Vibration
|
A
|
B
|
C
|
|
Steady-state
|
0.02
|
0.05
|
0.10
|
|
Impact
|
0.35
|
0.50
|
0.75
|
C.
For purposes of these performance standards, steady-state vibrations
are vibrations which are continuous or vibrations in discrete impulses
more frequent than 60 per minute. Discrete impulses which do not exceed
60 per minute shall be considered impact vibrations.
E.
During impact vibration operations, vibration monitoring must occur
in accordance with N.J.A.C. 12:190-7.26.
F.
For all upland piling vibration monitoring must be performed using
a seismograph with a triaxial geophone that records particle velocity
displacement in three mutual perpendicular directions (vertical and
two horizontal directions). The seismograph must have a peak particle
velocity dynamic range of up to 10 inches per second and a sample
rate of 1,024 samples per second per component. The seismograph must
continuously record and store the highest peak particle velocity at
a minimum of three-second intervals. A caution level of 75% of the
maximum level shall be established for each job site. If ground vibrations
reach the caution level, the seismograph must record a waveform event
in order to measure the frequency of the vibration and the particle
velocity. All vibration monitoring must be performed by an individual
trained in vibration monitoring that is under the direct supervision
of a New Jersey licensed engineer.
G.
The installer of the pilings, sheet piling, foundation pilings and
other pilings of any kind shall submit a record of the recordings
to the Construction Office within five days of completing the work.
Applications for permits to perform pile driving for upland
foundations shall be accompanied with plans showing size, location,
configuration and specification of materials to be used in the placement
of upland foundation piling as well as the manner in which such materials
shall be incorporated into the upland foundation piling.
A.
Prior to the commencement of work to install upland foundation piling,
the contractor shall notify the owner of all properties contiguous
to the subject property for which the piling are to be installed.
All notifications shall be in writing and shall include the name,
address and telephone number of the piling installation contractor
and the owner of the property, the street address, lot and block of
the property and the date(s) on which the piling installation is to
be done and shall be delivered at least 10 calendar days prior to
the commencement date of the pile installation activity, and shall
be forwarded by either personal delivery to the owner(s) or certified
mail.
B.
Notification shall be forwarded to the property's mailing address
as set forth on the Margate City tax bill for each property. Proof
of such notification to contiguous property owners shall be furnished
to the Construction Office prior to the commencement of pile driving.
All piling contractors prior to issuance of a permit shall present
to the Construction Office proof of insurance coverage by way of an
insurance certificate indicating that the contractor has personal
injury and property damage liability insurance in a minimum amount
of $1,000,000 per occurrence. Such insurance coverage must be in effect
during the duration of the permit. The City of Margate City as an
interested party shall be notified of the cancellation of lapse of
any policy. In the event that said policy is cancelled or lapsed and
is not immediately renewed or replaced, the permit issued hereunder
shall be revoked.
Every upland foundation pile driving construction site in Margate
shall have a sign 18 inches in width and 24 inches in height posted
at the site which shall contain a phone number given to the contractor
by the City of Margate advising people to call if they believe any
violation of this chapter has occurred.
Any person, firm, association or corporation violating the provisions
of this chapter shall be subject, upon conviction, to a fine not to
exceed $1,000 or imprisonment for a term not to exceed 90 days, or
both such fine and imprisonment.
