The following are intended to be minimum standards
and requirements for all blasting operations.
Notwithstanding any other provision of this
chapter or of any license issued under this chapter, no blasting operation
shall be conducted in such a manner as to cause any substantial loss,
harm or damage to the owner of any property located outside of the
controlled blasting site area, or to the Village, or to the public
health, safety or welfare, or to create a serious risk of such loss,
harm or damage.
No person shall prepare explosive materials
for use in any blasting operation or conduct or engage in any blasting
operation, and no operator shall employ any person for such purposes,
unless the person so preparing explosive materials or conducting or
engaging in a blasting operation holds a valid blaster's license of
the proper classification issued by the Department pursuant to Ch.
SPS 307, Wis. Adm. Code, or unless such person is working under the
direct supervisor of a blaster holding a valid blaster's license of
the proper classification.
No person shall conduct or engage in any blasting
operation, or any related activities, without complying fully with
the requirements of this chapter and the requirements of Ch. SPS 307
("Explosives and Fireworks"), Wis. Adm. Code.
Blasting operations shall only be conducted
between 9:00 a.m. and 4:00 p.m. on Mondays through Fridays and between
9:00 a.m. and noon on Saturdays other than on legal holidays, or during
more restrictive periods specified in a particular blasting license;
provided, however, that in the event an emergency has delayed a blast,
a loaded charge may be exploded within a reasonable time thereafter.
The Village Administrator may authorize in writing individual instances
of blasting outside of the normally permissible time periods upon
a showing of extreme nonrecurring need by an operator.
A blasting log shall be prepared and maintained
by the operator for each blast, and a complete copy of such log shall
be delivered to the Village Clerk within three working days after
such blast. Each blasting log shall contain the following information,
if applicable and without limitation:
A.
Name and license number of blaster in charge of the
blast;
B.
Blast location with grid coordinates referenced to
a scaled aerial photograph or scaled diagram of the blasting site;
C.
Date and time of blast;
D.
Weather conditions at time of blast;
E.
Diagram and cross section of blast layout;
F.
Number of blast holes, if applicable;
G.
Blast hole depth and diameter;
H.
Spacing and burden of blast holes;
I.
Number of holes per delay or number of delays per
hole;
J.
Maximum pounds of explosives per delay;
K.
Total pounds of explosives used;
L.
Depth and type of stemming used;
M.
Distance to nearest inhabited building outside of
the controlled blasting site area;
N.
Type of initiation system used;
O.
Exact location of the monitoring instrument, including
the distance from the blast and the grid coordinates of the instrument
referenced to a scaled aerial photograph or scaled diagram of the
blasting site and surroundings supplied to the Village;
P.
Name and affiliation of the individual reading the
monitoring instrument;
Q.
Type, manufacturer and model of the monitoring instrument
used and the last calibration date;
R.
Peak particle velocity and airblast levels recorded;
and
S.
Name of individual and firm analyzing the peak particle
velocity and airblast data, when required.
All blast monitoring instruments utilized to
monitor blasts pursuant to this chapter shall comply with the following
minimum specifications:
A.
Seismic frequency range: 2 to 200 Hz (±3 Hz).
[Amended at time of adoption of Code (see Ch. 1, General
Provisions, Art. II)]
B.
Acoustic frequency range; 2 to 200 Hz (±1 dB).
[Amended at time of adoption of Code (see Ch. 1, General
Provisions, Art. II)]
C.
Velocity range 0.02 to 4.0 inches/second.
D.
Sound range: 110 to 140 dB linear.
E.
Transducers: three mutually perpendicular axes.
F.
Recording: provide time-history of waveform.
G.
Calibration: be laboratory calibrated as often as
necessary, but at least once every 12 months and according to manufacturer's
recommendations.
The operator shall monitor every blast with
a blast monitoring instrument satisfying the requirements of this
chapter located in the immediate vicinity of the closest inhabited
building outside of the controlled blasting area or, if the operator
cannot obtain permission to monitor at such location, at the location
best approximating the location of such building for the purposes
of accurately monitoring the level of the blasting resultants at such
building. Village officials may direct the operator to monitor blasts
at other locations from time to time, and the operator shall comply
with such directions. If it appears that the blasting resultants are
higher at an inhabited building outside of the controlled blasting
site area other than the closest such inhabited building, the monitoring
instrument shall be located in the immediate vicinity of such other
building. The peak particle velocity and peak airblast decibel readings
with respect to each blast shall be delivered to the Village Clerk
within three business days after the blast.
Flyrock traveling through the air or along the
ground shall remain within the controlled blasting site area and shall
not be cast from the location of the blast more than one-half of the
distance to the nearest inhabited building within or outside of the
controlled blasting site area. Any violation of this requirement shall
be reported immediately by the operator to the Village Clerk with
a full explanation of the probable cause of such violation and the
steps being taken to preclude any possibility of a repetition.
Ground vibration resulting from a blast shall
not exceed the peak particle velocity limit set out in the following
Figure 1 at the inhabited building located outside of the controlled
blasting site area which is closest to the location of the blast or
at any inhabited building located outside of the controlled blasting
site area.
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Airblast resulting from a blast shall not exceed
118 dB at the inhabited building located outside the controlled blasting
site area which is closest to the location of the blast or at any
other inhabited building located outside of the controlled blasting
site area.
