[Ord. No. 1304 §99, 10-21-2009]
A.
Use of
explosives for blasting shall be permitted after all appropriate applications
and permits have been approved. Blasting shall be done only by those
experienced in the handling of explosives and in accordance with the
recommendations of the Associated General Blaster's Manual of Accident
Prevention (AGCMAP) in Construction and OSHA regulations. In locations
where flying rock may be present, additional overburden shall be ready
for use and/or in place before denotation. All trenching operations
utilizing explosives shall be suitably backfilled to prevent any fly
rock endangerment to persons or property. The use of these procedures
does not relieve the blaster of responsibility for damage to life
and property.
B.
The Mission
Community Development Department will be known as the "authority having
jurisdiction" regarding the storage, handling, use and control of
explosives used in construction projects. The Building Code Official
will issue all blasting permits. Control of the public road right-of-way
remains with the Mission Public Works Department.
C.
Requirements
of the International Fire Code, Chapter 33, regarding explosives and
blasting agents shall be considered part of these regulations. The
Building Code Official may enforce other national standards such as
Explosives and Blasting Procedures, Explosives Training Manual, Blasters
Handbook and the Safety Practices Manual. All explosives and related
material shall be in conformity with the requirements of the authority
having jurisdiction and the specifications contained herewith, whichever
is more stringent. Blasting will not be permitted within eighty feet
(80') of any building structure.
D.
All blasting
operations shall be conducted under the direction of a Kansas certified
blaster. Evidence of blaster certification shall be carried by blasters
or shall be on file at the Community Development Department during
blasting operations. A blaster and at least one other person shall
be present at the firing of a blast. Persons responsible for blasting
operations at a blasting site shall, as a minimum, conform to the
criteria as outlined. The blaster shall be responsible for all damage
caused by blasting operations and shall be responsible for responding
to all complaints. Suitable methods shall be employed to confine all
materials lifted by blasting within the limits of the excavation or
trench. All rock, which cannot be handled and compacted as earth,
shall be kept separate from other excavated materials and shall not
be mixed with backfill or embankment materials except as specified
or directed by the Building Code Official.
All blasting shall be in conformity with the requirements having
jurisdiction over the right-of-way and the specifications contained
herewith under the International Fire Code and Codes office, whichever
is more stringent.
E.
A blast
design shall be submitted to the Building Code Official for review
prior to any blasting operations. The blast design shall contain sketches
of the drill patterns, delay periods and decking and shall indicate
the type and amount of explosives to be used, critical dimensions
and the location and general description of structures to be protected,
as well as an outline of design factors to be used, which protect
the public and meet the applicable air blast and ground vibration
standards as set forth in Section 9. The blast design shall be prepared
and signed by a certified blaster. The Building Code Official may
request changes to the design submitted.
[Ord. No. 1304 §100, 10-21-2009]
A.
At least
ten (10) days before any blasting, the surveyor shall notify, in writing,
all residents or owners of dwellings and other structures located
within six hundred (600) feet of the blasting area of the intent to
conduct a preblasting survey. The Building Code Official may modify
the 600 feet distance for good cause. Notification shall be by certified
mail with a copy by regular mail.
B.
The surveyor
shall conduct a preblasting survey of dwellings and structures and
prepare a written report of the survey. The surveyor, if requested
by the Building Code Official, shall perform an updated survey of
any additions, modifications or renovations to dwellings or structures.
C.
The surveyor
shall determine the condition of the dwelling or structure and shall
document any existing damage or other physical factors that could
be affected by the blasting. Unless prevented by the owner or occupant
of the property, the surveyor shall examine the interior as well as
the exterior structure and shall document any damage by means of photographic
or video-recording methods. Structures such as pipelines, cables,
transmission lines, cisterns, wells and other water systems, may warrant
special attention; however, the assessment of these structures can
be limited to surface conditions and other readily available data.
Upon written request to the Building Code Official by Johnson County
Wastewater, the interior of any existing sanitary sewer line shall
be surveyed by means of a permanently recorded closed-circuit video
camera prior to blasting operations and after blasting has been concluded
in the area of the existing sewer line.
D.
The person
who conducted the survey shall sign the written report of the survey.
Copies of the report shall be promptly provided to the Building Code
Official. The surveyor shall complete all surveys before any blasting.
A disinterested third party, regularly engaged in performing preblast
surveys, shall conduct all surveys.
E.
The preblast
survey shall not commence until the survey method has been reviewed
and approved by the Building Code Official.
[Ord. No. 1304 §101, 10-21-2009]
Before blasting is started, the blaster shall inform all residents
within a radius of 1,500 feet of the blasting location by means of
printed information sheets. The notification shall be delivered by
registered mail, with a copy by regular mail or by hand delivery with
a signature from the owner or occupant to evidence receipt. At a minimum,
the information sheets shall include the blaster's name and contact
information, approximate dates and times of blasting, source and scope
of blast monitoring, explanation of warnings and control area parameters.
[Ord. No. 1304 §102, 10-21-2009]
The blaster shall provide suitable warning by siren or whistle
prior to all blasts.
[Ord. No. 1304 §103, 10-21-2009]
The requirements presented herein shall not relieve the blaster
from responsibility to avoid disturbing earth or rock beyond indicated
and specified lines and levels.
[Ord. No. 1304 §104, 10-21-2009]
The blaster shall notify the owner or operator of all gas, water
and petroleum pipelines in any area where blasting will occur. A representative
of the pipeline owner shall be allowed to be present to observe preparations
and blasting.
[Ord. No. 1304 §105, 10-21-2009]
The blaster shall conduct blasting operations between 8:30 A.M.
and 4:30 P.M. as approved by the Building Code Official and announced
in the blasting schedule. The Building Code Official may direct that
blasting only occur during a certain hour or hours.
[Ord. No. 1304 §106, 10-21-2009]
A.
Blasting
signs shall meet the specifications of this Section. The blaster shall:
1.
Conspicuously
place signs reading "Blasting Area" along the edge of any blasting
area that comes within 100 feet of any public or private road and
at the point where any other road provides access to the blasting
area; also, conspicuously place signs reading "Blasting Area —
Turn Off Two-Way Radios" along the edge of any blasting area that
comes within five hundred (500) feet of any road and one thousand
(1,000) feet on either end of the blasting area; and
2.
Place
conspicuous signs that state "Warning! Explosives In Use" at all entrances
to the permit area from any road. The signs must clearly list and
describe the meaning of the audible blast warning and "all-clear"
signals that are in use and must explain the marking of blasting areas
and charged holes awaiting firing within the permit area and shall
give warnings and "all-clear" signals of different character or pattern
that are audible within a range of one thousand (1,000) feet from
the point of the blast. Each person within the permit area and each
person who resides or regularly works within one thousand (1,000)
feet of the permit area shall be notified of the meaning of the signals.
Access within the blasting area shall be controlled to prevent presence
of livestock or unauthorized persons during blasting. Access to and
travel within the blasting area shall not be resumed until the blaster
has reasonably determined that no hazards, such as imminent slides
or un-detonated charges, exist.
[Ord. No. 1304 §107, 10-21-2009]
A.
Blasting
shall be conducted in a manner to prevent injury to persons, damage
to public or private property, adverse impacts on any underground
mine and change in the course, channel or availability of surface
or ground water outside the permit area.
B.
Air blast
shall not exceed the maximum limits listed below at the location of
any building outside the permit area, except as provided in this Section.
If necessary to prevent damage, the Building Code Official can specify
lower maximum allowable air blast levels than those listed in this
Section for use in the vicinity of a specific blasting operation.
|
Lower frequency limit of measuring system, in Hz (+3 dB)
|
Maximum level, in dB
| |
|---|---|---|
|
0.1 Hz or lower — flat response1
|
134 peak
| |
|
2 Hz or lower — flat response
|
133 peak
| |
|
6 Hz or lower — flat response
|
129 peak
| |
|
C-weighted — slow response1
|
105 peak dBC
| |
|
1Only when approved by the Building
Code Official
| ||
C.
The blaster
shall conduct monitoring to ensure compliance with the air blast standards.
The measuring systems shall have an upper-end flat frequency response
of at least two hundred (200) Hz.
D.
The maximum
ground vibration for protected structures listed in this Section shall
be established in accordance with the maximum peak-particle-velocity
limits, the scaled-distance equation, the blasting level chart or
by the Building Code Official. All structures in the vicinity of the
blasting area, such as water towers, pipelines and other utilities,
tunnels, dams, impoundments and underground mines, shall be protected
from damage by the establishment of a maximum allowable limit on the
ground vibration, one (1.0) inches per second. The Building Code Official
may specify a more restrictive limit in the interest of the public
safety or the Building Code Official may approve a higher limit if
the blaster can demonstrate that damage will not occur to buildings
or structures.
E.
The maximum
ground vibration shall not exceed the following limits at the location
of any building.
|
Distance
|
Maximum Allowable
|
Scaled Peak
|
|---|---|---|
|
Distance (D) from the blasting site in feet
|
Particle velocity (Vmax) for ground vibration in inches/second 1
|
Factor to be applied without seismic monitoring 2
|
|
0 to 300
|
1.00
|
50
|
|
301 to 5,000
|
1.00
|
55
|
|
5,001 and beyond
|
0.75
|
6
|
|
1Ground vibration shall be measured
as the particle velocity. Particle velocity shall be recorded in three
(3) mutually perpendicular directions. The maximum allowable peak
particle velocity shall apply to each of the three (3) measurements.
|
|
2Applicable to the scaled-distance
equation.
|
F.
A seismographic
record shall be provided for each blast at locations designated by
the Building Code Official. A blaster may use the scaled-distance
equation, W=(D/Ds), to determine the allowable charge weight of explosives
to be detonated in any eight (8) millisecond period, without seismic
monitoring; where W=the maximum weight of explosives, in pounds; D=the
distance, in feet, from the blasting site to the nearest protected
structure; and Ds=the scaled-distance factor, which may initially
be approved by a licensed engineer using the values for scaled-distance
factor listed. The blaster may use the ground-vibration limits in
Figure 1 of this Section to determine the maximum allowable ground
vibration.
 |
G.
If the
Figure 1 limits are used, a seismographic record including both particle
velocity and vibration-frequency levels shall be provided for each
blast. The Building Code Official shall approve the method for the
analysis of the predominant frequency contained in the blasting records
before application of this alternative-blasting criterion. The Building
Code Official can reduce the maximum allowable ground vibration beyond
the limits otherwise provided for in this Section, if determined necessary
to provide damage protection.
H.
The blaster
shall conduct seismic monitoring of all blasts at locations approved
by the Building Code Official.
[Ord. No. 1304 §108, 10-21-2009]
A.
The blaster
shall retain a record of all blasts for at least three (3) years.
Upon request, copies of these records shall be made available to the
Building Code Official and/or public for inspection within twenty-four
(24) hours. Such records shall contain the following data:
1.
Name
of the blaster conducting the blast;
2.
Location,
date and time of the blast;
3.
Name,
signature and certification number of the blaster conducting the blast;
4.
Identification,
direction and distance, in feet, from the nearest blast hole to the
nearest dwelling, public building, school, church, community or institutional
building outside the permit area, except those described herein;
5.
Whether
conditions, including those which may cause possible adverse blasting
effects;
6.
Type
of material blasted;
7.
Sketches
of the blast pattern including number of holes, burden, spacing, decks
and delay pattern;
8.
Diameter
and depth of holes;
9.
Types
of explosives used;
10.
Total
weight of explosives used per hole;
11.
The
maximum weight of explosives detonated in an eight (8) millisecond
period;
12.
Initiation
system;
13.
Type
and length of stemming;
14.
Mats
or other protections used;
15.
Seismographic
and air blast records shall include:
a.
Type
of instrument, sensitivity and calibration signal or certification
of annual calibration;
b.
Exact
location of instrument and the date, time and distance from the blast;
c.
Name
of the person and firm taking the reading;
d.
Name
of the person and firm analyzing the seismographic record; and
e.
The
vibration and/or air blast level recorded.
[Ord. No. 1304 §109, 10-21-2009]
A.
The blaster
shall be trained and be knowledgeable in the applications of all Sections
of the adopted blasting codes. The blaster shall be responsible for:
3.
Loading
blast holes, including priming and boostering;
4.
Initiation
systems and blasting machines;
6.
Secondary
blasting applications;
7.
Current
Federal and State rules applicable to the use of explosives;
8.
Blast
records;
9.
Schedules;
11.
Blast-plan
requirements;
12.
Certification
and training;
13.
Signs,
warning signals and site control;
15.
The
appropriate licensing authority shall license the blaster. The blaster
shall be responsible for obtaining all necessary permits required
for blasting operations.
[Ord. No. 1304 §110, 10-21-2009]
Any person violating any provision of this code shall be punished as provided in Section 100.100 of the Mission City Code.
