[Ord. No. 110706A §1, 11-7-2006]
A. In
all operations under this Chapter, whether above ground or below surface,
except as otherwise authorized in this Chapter, the maximum peak particle
velocity shall not exceed one (1.0) inch per second at the location
of any structure. Peak particle velocities shall be measured in three
(3) mutually perpendicular directions.
B. The
maximum peak particle velocity shall be the largest of any of these
three (3) measurements and shall not apply at the following locations:
1. At structures owned by the person conducting the blasting activity
and not leased to another party;
2. At structures owned by the person conducting the blasting activity
and leased to another party, if a written waiver by the lessee is
submitted to the licensing officer prior to blasting.
C. Flyrock,
including blasted material traveling along the ground, shall not be
cast from the permit area.
D. Access
to an area possibly subject to flyrock from blasting shall be regulated
to protect the public. Access to the area shall be controlled to prevent
the presence of unauthorized personnel during blasting until an authorized
representative of the person conducting the blasting activity has
reasonably determined:
1. That no unusual circumstances, such as imminent slides or undetonated
charges, exist; and
2. That access to and travel in or through the area can be safely resumed.
E. All
permitted activities shall be conducted so as to prevent injury to
persons and damage to public or private property outside the permit
area.
F. Before
firing any blast, all means of access to the danger zone (the extent
of which shall be determined by the blaster, but in no case to be
closer to the explosion than the blaster himself or three hundred
(300) feet, whichever is more) shall be effectively guarded to exclude
all unauthorized personnel. The blaster shall then sound a warning
of sufficient intensity and duration to be distinctly audible to all
persons within the danger zone and all such persons shall retire beyond
the danger zone. The danger zone shall then be examined by the blaster
to make certain that all persons have retired there from to a place
of safety. No blast shall be fired while any person is in the danger
zone.
G. When
the point of explosion is within three hundred (300) feet of a roadway,
the blaster shall, just prior to the blast, designate a sufficient
number of employees of the operator, each carrying a red warning flag,
to stop all vehicular and pedestrian traffic on each possible route
of travel within three hundred fifty (350) feet of the point of explosion
until the blast has been fired.
H. No
person shall return to the danger zone until permitted to do so by
the blaster as announced by audible or visual signal.
I. Immediately
following the blast the area shall be examined by the blaster for
evidence of misfired charges.
J. A complete
record shall be kept by the blaster showing the number of holes, the
amount of explosive used per hole, amount of explosive used per delay,
length of delay, all misfires and method of disposal of misfires.
[Ord. No. 110706A §1, 11-7-2006]
A. A summary
of the records of each blast, whether above ground or below surface,
including seismograph reports shall be submitted to the licensing
officer at weekly intervals for blasts occurring during the previous
week. The record shall contain the following data for each blast:
1. Name of the permittee conducting the blast;
2. Location, date and time of the blast;
4. Direction and distance in feet from the blast to the monitoring device;
5. The number of holes drilled;
6. The maximum weight of explosives in pounds used in any hole;
7. Maximum weight of explosives in pounds used per delay;
9. The total weight of explosives in pounds used in the blast;
10. Peak particle velocity at the testing location;
11. Name of company and the person taking the seismograph reading;
12. Affidavit of company monitoring the blast, certifying the accuracy
and truth of the reading obtained from the seismograph.
B. Monitoring
shall be performed by an independent firm approved by the City, retained
and compensated by permittee, who is responsible for submittal of
the data directly to the City. The monitoring shall be performed by
an engineering technician working under the direction of a registered
professional engineer. Tabulated data shall be submitted to the City
at weekly intervals. The firm shall be responsible for notifying the
City within one (1) hour of any blast exceeding the permitted values.
Work shall be stopped and the City notified immediately if any blast
exceeds one and one-half (1.5) inch per second.
C. The
licensing officer may suspend blast monitoring after the data from
five (5) blasts is submitted if, at his determination, monitoring
is not necessary to protect the public and when no individual blast
exceeded one (1) ips. All blasts over one (1) ips must be continuously
monitored. The licensing officer may reimpose the monitoring requirements
at his sole discretion. The suspension of monitoring does not relieve
the permittee from any other requirements of this Chapter.