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New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 6 - TRANSPORTATION OF EXPLOSIVES OFF-THE-HIGHWAY › Section 12:190-6.4 - Signs and markings

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Any vehicles on the job site containing explosives shall be placarded on the front, back, and sides, in one of the following ways:
1. Placards with the word "EXPLOSIVES" in letters six inches high and in colors contrasting with the background; or
2. Placards in accordance with 49 CFR 172.522, 523, or 524.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 6 - TRANSPORTATION OF EXPLOSIVES OFF-THE-HIGHWAY › Section 12:190-6.5 - Off highway transportation of explosives

Current through Register Vol. 56, No. 14, July 15, 2024
(a) The person using any vehicle for the transportation of explosives, including the owner or lessee, shall be responsible for the keeping of records related to inspections required under the Act.
(b) No explosives shall be transported in any form of full trailer, nor shall any trailer be attached to a vehicle transporting explosives.
(c) Vehicles in which explosives are being transported shall be driven by and be under the control of a driver at least 21 years of age. Such a person shall be familiar with the New Jersey laws and rules and regulations pertaining to the transportation of explosives.
(d) Blasting caps or electric blasting caps, or both, may be transported in the same vehicle with other commercial explosives only when the net weight of the other commercial explosives does not exceed 5,000 pounds.
(e) When nitro-carbo-nitrates or propellants, or both, are transported in the same vehicle with commercial explosives, all requirements governing the transportation of commercial explosives must be followed.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 6 - TRANSPORTATION OF EXPLOSIVES OFF-THE-HIGHWAY › Section 12:190-6.6 - Transportation of explosives in underground operations

Current through Register Vol. 56, No. 14, July 15, 2024
(a) This section shall apply to the transportation of explosives from the surface to underground operations.
(b) Explosives in small amounts shall be transported in a substantially constructed transport box with lid and sides of plywood at least one inch thick or equivalent. The transport box shall be painted red, with a conspicuous marking reading: "EXPLOSIVES".
(c) Explosives exceeding 100 pounds shall be transported in a powder car of sound construction with an interior and lid of nonsparking material.
(d) The hoist operator shall be notified before transporting explosives in a shaft.
(e) Explosives shall be moved from the surface to the underground destination without any delay enroute.
(f) Detonators and other explosives shall not be transported together in the same transport box, in any shaft conveyance, or in the same cargo space of a powder car. Explosives shall not be transported in any conveyance containing other material.
(g) A person shall not ride in any shaft conveyance transporting explosives.
(h) Explosives transported underground by railroad shall be:
1. In a powder car or, if in small amounts, in a clean empty railroad car;
2. Pulled by a locomotive, if a locomotive is used; and
3. Separated by at least one empty railroad car between the locomotive and the explosive car.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 6 - TRANSPORTATION OF EXPLOSIVES OFF-THE-HIGHWAY › Section 12:190-6.7 - Manual transportation of explosives

Current through Register Vol. 56, No. 14, July 15, 2024
(a) This section shall apply to the manual transportation of explosives by a person.
(b) Explosives shall not be carried in personal clothing.
(c) When it is necessary to carry explosives which are not in the original outside container, they shall be carried in a suitable bag or container.
(d) Blasting caps shall not be transported in the same bag or container with other explosives.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.2 - Compliance

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Every mine operator employing the services of a blaster shall use every reasonable precaution to provide for the safety of his employees, all persons at the blast site, and the public in the vicinity of the blast site. Such operator shall comply with this subchapter.
(b) Every contractor and other persons employing the services of a blaster shall use every reasonable precaution to provide for the safety of all persons at the blast site and the public in the vicinity of the blast site. Such contractor and other person shall comply with this subchapter.
(c) Any of the following shall be jointly responsible for compliance with this chapter when involved in any way with blasting operations:
1. Any mine operator;
2. Any contractor;
3. Any sales individual, company firm or corporation providing the services of a blaster;
4. Any other employer of a blaster; and
5. Any blaster.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.3 - Notification

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Any person intending to conduct a blasting operation shall notify the New Jersey Department of Labor and Workforce Development, Division of Public Safety and Occupational Safety and Health, Mine Safety Section in Trenton of such intention prior to conducting the blasting operation via phone followed by fax transmittal or in writing. Such notification must be received by the Division of Public Safety and Occupational Safety and Health no later than 3:00 P.M. of the previous business day prior to conducting the blasting operation on forms specified by the Department of Labor and Workforce Development. Illegible or incomplete notifications shall not be acceptable. Notifications shall include:
1. The contractor name and address;
2. The specific location of the blasting;
3. The intended time of the blast; and
4. The specific start and scheduled completion dates of the blasting operations.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.4 - Documentation at the blasting site

Current through Register Vol. 56, No. 14, July 15, 2024
Any person conducting blasting operations shall have at the blasting site a current permit to use explosives and evidence of insurance required by 12:190-7.5.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.5 - Insurance

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Any self-employed person in possession of a valid permit to use explosives for blasting purposes shall have an insurance coverage for blasting damage not less than $ 500,000 for property damage including explosion, collapse, and underground utility damage and $ 500,000 to $ 1,000,000 personal injury.
(b) Any person in possession of a valid permit to use explosives for blasting purposes who is working for any person, shall not use explosives for such person, unless the employer has a valid insurance policy for blasting damage not less than $ 500,000 for property damage including explosion, collapse, and underground utility damage and $ 500,000 to $ 1,000,000 personal injury.
(c) Proof of the possession of a valid insurance policy covering blasting damage shall be readily available for inspection at the site.
(d) Nothing in (a) and (b) above shall be construed as preventing a greater insurance coverage for damage from blasting when requested by any person for whom blasting is being done.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.6 - Time of blasting operations

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Blasting, except during normal unusual conditions and when approved by the Commissioner, shall be conducted only during daylight hours, but shall not be conducted before 8:00 A.M. or after 6:00 P.M. on the day of blasting.
(b) Blasting shall not be conducted on Sundays except as approved by the Commissioner. Blasting on State legal holidays shall not exceed 100 pounds of explosives in any single blast, except as approved by the Commissioner.
(c) Loading of explosives into blast holes shall not be performed in other than daylight hours on the day of blasting, except as approved by the Commissioner.
(d) Where loading of blast holes has occurred and blasting cannot be safely accomplished within the limits prescribed by (a) and (c) above, the blast holes shall be attended until the explosives have been disposed of, and the person conducting the blasting operations shall notify the appropriate officials of the Division of Public Safety and Occupational Safety and Health.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.7 - Blasting in the vicinity of utility lines

Current through Register Vol. 56, No. 14, July 15, 2024
(a) This section shall apply to:
1. Blasting operations in the vicinity of underground utility lines or exposed utility lines making contact with the earth's surface, which are, but not limited to, any of the following: gas, water, hydrocarbon, sewer, electric or telephone lines; and
2. Supporting foundations of utility lines when such utility lines are located above the earth's surface and the supporting foundations are in the vicinity of blasting operations.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.8 - Proximity to highways

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Before blasting within the right of way of a highway where the bank or unpredictable rock conditions are liable to cause fly rock, the police authority having jurisdiction over the highway shall be notified of intent of the blaster to stop traffic.
(b) When blasting under the conditions of (a) above, a sufficient number of persons, each with a red flag not less than two feet square attached to a short shaft, shall be designated to prevent any vehicular traffic from entering the danger area.
(c) Mobile equipment, vehicles and any unauthorized person shall not be located within 25 feet of loaded blast holes, blast holes being loaded, or within the normal throw of blasted material but in no case less than 25 feet except as provided in 12:190-7.1 0(c) or when an exception is granted under 12:190-1.6. This provision shall not apply to mobile equipment placing blasting mats or vehicles used specifically for loading.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.9 - Warning signs and signals

Current through Register Vol. 56, No. 14, July 15, 2024
(a) A sign indicating blasting warning signals shall be posted at one or more conspicuous places where blasting operations are being conducted. The blaster shall set adequate time sequences between warning signals to give the public sufficient time to take cover. The lettering on such signs shall be not less than four inches in height on a contrasting background. The asterisk on the sign example indicates the time fixed by the blaster. The sign shall read as follows or express an equivalent:
BLASTING WARNING SIGNALS
2 LONG SIGNALS-1ST WARNING
*MINUTES TO BLASTING
1 LONG SIGNAL-FINAL WARNING
1 MINUTE TO BLASTING
2 SHORT SIGNALS-ALL CLEAR
(b) Warning signs shall be posted 350 feet from all approaches to the blasting area open to the public. The lettering on such signs shall be not less than four inches in height on a contrasting background, and the signs shall read as follows or express an equivalent:
DANGER
BLASTING ZONE
KEEP OUT
(c) Warning signs shall be placed on the right shoulder of all public vehicular approaches 350 feet from blasting sites, utilizing electric blasting caps. The lettering on such signs shall be not less than four inches in height on contrasting background, and the signs shall read as follows or express an equivalent:
BLAST AREA
TURN OFF TWO-WAY RADIO
(d) The person conducting blasting operations shall fix the time of blasting, check the blast area, post guards to keep all unauthorized persons out of the blast area, and sound the warning signals utilizing an effective warning device.
(e) When a warning device has been sounded, all persons not authorized to be in the blast area shall leave or take cover and not return until the all clear signal has been sounded.
(f) Warning signs shall be removed or covered when blasting or loading is not being performed.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.10 - Drilling blast holes

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Prior to drilling blast holes, a written diagram and a field layout of all blast holes shall be prepared by the blaster and given to the driller.
(b) The surface shall be carefully examined to detect the possible presence of unfired explosive materials, and drilling shall not be performed in blast holes that have contained explosive materials.
(c) When a blast hole has been loaded, no drilling shall be performed within a distance less than the depth of the hole, but in no case less than 25 feet from the loaded blast hole. Drilling may be performed to free an obstructed blast hole not containing explosives, when all explosives in the vicinity have been located at a safe distance. Such drilling operations shall be under the direct supervision of the blaster.
(d) All blast holes shall be of sufficient diameter so that cartridges of explosive materials can be inserted to the bottom of the hole without excessive force.
(e) Any person drilling blast holes shall inform the blaster of any unusual conditions, such as voids or mud seams or any deviation from the blast hole layout involving burden and spacing. Unusual conditions shall be recorded in writing and sent to the blaster.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.11 - Planning and preparation for blasts

Current through Register Vol. 56, No. 14, July 15, 2024
(a) The blaster shall plan each blast taking special precautions in loading, delaying, initiation and confinement so as to control the throw of fragments, ground vibration, and air blast effects.
(b) In planning a blast, careful consideration shall be given to the initiating system of the explosive charges. The recommendations of the manufacturer of the explosive device to be used shall be followed.
(c) When blasting is to be conducted near a property line where the adjacent property owner is not a party to the blasting operations, the blaster shall take precautions to prevent rock slides, sloughing or back break from extending into the adjoining property. These precautions shall include: angle drilling, reduced blast hole size, reduced blast hole depth, reduced explosive charges, or any other recognized method of controlled blasting.
(d) Sufficient, suitable stemming or tamping material shall be placed at the blast holes prior to delivery of explosives into the loading area. All equipment and tools not used for loading explosives into blast holes shall be removed from the loading area prior to delivery of explosives into the blast area. There shall be no activity in the loading area, other than loading of blast holes.
(e) Mobile equipment, vehicles and any unauthorized person shall not be located within 25 feet of loaded blast holes, blast holes being loaded, or within the normal throw of blasted material but in no case less than 25 feet except as provided in 12:190-7.1 0(c) or when an exception is granted under 12:190-1.6. This provision shall not apply to mobile equipment placing blasting mats or vehicles used specifically for loading.
(f) Only tools and equipment of nonsparking type shall be used to load blast holes. When loading blast holes underground or in other dark locations, only approved flood lamps, electric cap lamps or flashlights shall be used as illumination.
(g) Blast holes, prior to loading, shall be examined for alignment, water, blockage or other defects.
(h) All loaded holes shall be included in the next blast unless there is at least 100 feet separation between the loaded holes of the next blast and the holes being loaded for a subsequent blast.
(i) All required warning signs shall be posted.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.12 - Initiation with electric detonators

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Precautions shall be taken to prevent accidental discharge of electric blasting caps from current induced by radar, radio transmitters, lightning, adjacent power lines, dust storms or other sources of extraneous electricity.
1. All blasting operations shall be suspended and all persons shall be removed from the blasting area during the approach and progress of an electric storm.
2. Signs warning against the use of mobile radio transmitters shall be posted on all roads within 350 feet of the blasting operations.
3. The blaster shall comply with Radio Frequency Radiation Hazards, IME No. 20-1978.
4. Before commencing blasting operations under high voltage electric power lines or in other areas suspected of having extraneous electric currents, the area shall be tested for extraneous electric current by a competent person using an instrument designed for this purpose. Where extraneous electric currents exceeding 0.05 ampere are found, the use of electric blasting is prohibited.
5. When electric equipment or energized power distribution circuits are within a horizontal distance of 25 feet of the blast holes, the area shall be tested for extraneous electric current by a competent person using an instrument designed for the purpose. Testing need not be performed where the possible source of extraneous electric current is removed or turned off. This provision shall not apply to overhead electric lines, when the utility company gives approval to use electric blasting caps.
6. The leg wires of the electric blasting caps shall be kept shunted unless being tested or wired into the blasting circuit.
7. The firing line shall be kept shunted until immediately prior to the time of hook-up to the blasting machine or firing switch.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.13 - Initiation with safety fuse and cap

Current through Register Vol. 56, No. 14, July 15, 2024
(a) The safety fuse shall be in good condition. It shall not be kinked, bent sharply or handled roughly.
(b) Each spool of safety fuse shall be test burned to determine the burning rate. The burning rate shall be posted to assure that all persons using the fuse will know the burning rate.
(c) Blasting caps shall be crimped to the fuse only with a tool designed for that specific purpose. This work shall be performed at a safe location.
(d) Fuses shall be at least 48 inches long.
(e) Fuses shall be ignited with hot-wire lighter, lead spitters, ignitor cord, or other such devices designed for this purpose.
(f) Timing shall be such that the fuse in the last blast hole to fire is burning within the hole before the first blast hole fires.
(g) When cap and fuse are to be lighted, two individuals shall be present. No individual shall light more than 15 individual fires.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.14 - Initiation with detonating cord

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Detonating cord shall be in good condition, and have the proper core load and construction type for the work scheduled. It shall be kept free of kinks and sharp bends.
(b) Detonating cord down lines in blast holes shall be attached to a cap sensitive primer charge. Where the cord load is light, the detonating cord shall be attached to a blasting cap recommended by the manufacturer for this purpose which is to be inserted in the primer charge.
(c) Delayed connectors and blasting caps, used with detonating cords shall be handled with the same safety precautions as other detonators.
(d) Detonating cord lines shall be cut free from the spool when the primer charge is in place.
(e) Splices in the main trunk lines shall be tight square knots. Down lines shall be connected to the trunk lines by tight clove hitch knots at right angles to the trunk lines. Approved manufacturer's connecting devices may be used in place of cord-to-cord knots.
(f) When firing the detonating cord system with electric blasting caps, the caps shall be taped or fastened securely to the trunk line with the closed end of the cap pointing in the same direction the detonating cord is to fire. The cap shall not be attached until just before firing time.
(g) All detonating cord on the surface shall be covered with at least one foot of earth, sand or stone chips.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.15 - Initiation with other detonating systems

Current through Register Vol. 56, No. 14, July 15, 2024
Detonating systems not specifically addressed in this subchapter shall be utilized in accordance with the manufacturer's recommendation.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.16 - Explosives at blasting site

Current through Register Vol. 56, No. 14, July 15, 2024
(a) The amount of explosives taken into the blasting area shall not exceed the amount estimated by the blaster as necessary for the day's blasting.
(b) Damaged or deteriorated explosives shall not be delivered to the blast site.
(c) Only commercially manufactured explosive materials acceptable to the Commissioner shall be used for blasting operations.
(d) Explosives may be piled near blast holes at the blast site where the public is prohibited.
(e) The explosives shall be kept in small separate piles so as to prevent propagation of an explosion in the event of a premature explosion at any portion of a blast site.
(f) At blasting sites in close proximity to the public, all explosive materials shall be stored in Type 3 magazines until immediately before being loaded into blast holes.
(g) Blasting caps at the blast site shall be stored at a safe distance from all other explosive materials at blasting sites.
(h) Explosive materials for a subsequent blast shall be kept in an approved magazine, or shall be placed on the vehicle transporting explosives at a blasting site parked in accordance with Table 5.10 and attended.
(i) No explosives other than those in Fume Class I shall be used in underground mines, except explosives complying with Fume Class 2 or Fume Class 3 may be used, if adequate ventilation has been provided. The fume classification shall comply with Table 7.16(i).
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(j) When explosives are on a blast site a road is to be maintained for accessibility of emergency equipment.
(k) Explosives at a blast site shall not be left unattended.
(l) Explosives shall not be abandoned, buried or covered over by any materials as a means of disposal.
(m) All empty explosives packages, packaged linings and other rubbish from explosives containers left after the blast shall not be used again but disposed of in a safe manner.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.17 - Blast hole loading

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Blasting operations shall be under the direct supervision of a blaster holding the proper grade permit to use explosives.
(b) The blast hole loading crew shall be limited to four helpers for each blaster holding a permit to use explosives. When two or more blasting crews are used, the crews shall be separated by a practical distance consistent with efficient operation and supervision of crews.
(c) No intoxicating liquors or drugs shall be allowed in the blast area. No persons under the influence of intoxicating liquors or drugs shall be allowed in the blast area.
(d) No smoking or open flame devices shall be allowed within 100 feet of the blast area except for devices used in the lighting of safety fuse.
(e) All handling and use of explosive materials shall be immediately discontinued upon the approach of a thunderstorm and all persons in the area shall immediately seek a safe place.
(f) When preparing initiating primers, the work shall be performed adjacent to the blast hole just prior to using the primer. A nonsparking punch shall be used for the making of the hole in the explosive cartridge so that the detonator can be completely encased in the cartridge freely. Once each primer charge has been assembled, it shall be inserted immediately into the blast hole.
(g) Primer cartridges shall not be split, dropped, forced, tamped, or abused in any way when inserting them into the blast hole.
(h) The loading of the blast holes shall be as close to scheduled firing time as possible. When there is a delay, the loaded blast holes shall be under the observation of a guard stationed in the area.
(i) No explosive materials shall be loaded and left overnight without the approval of the Commissioner.
(j) During the loading operation, the blaster shall have a helper with him or her at all times to assist in the loading operation.
(k) When using plastic pipe as a loading pole, there shall be a nonsparking plug at the end of the pole which is used for tamping the explosive charges.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.18 - Firing the blast holes

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Before firing a blast which could cause injury to persons or damage to property from fly-rock, the material to be blasted shall be properly covered with blasting mats.
(b) The blaster shall fix the time of blasting.
(c) Prior to connecting the firing line to the blasting machine or permanent firing line, the blaster shall be certain that all persons have been cleared from the blast area, all approaches to the blast area are guarded, the traffic stopped when blasting in proximity to highways, and the proper warning signals sounded.
(d) The blaster shall designate a competent person to operate the blasting machine when duties associated with the blasting operation require the blaster's attention in the operational area of the blast.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.19 - Inspection after blasting

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Immediately after a blast has been fired, the firing line shall be disconnected from the blasting machine and all blasting lines shall be shunted. When firing from an electric power source in underground blasting, the switches shall be locked in an "Off" or "Open" position and the lightning gap shall be open.
(b) No person shall enter an underground blast area until at least 15 minutes has elapsed after a blast.
(c) The blast site shall be inspected to determine if all charges have been fired before work is resumed.
(d) If explosives or blasting agents are suspected of burning in a blast hole, all persons in the blast area shall move to a safe location and no person shall return to the blast area for at least one hour.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.20 - Misfires

Current through Register Vol. 56, No. 14, July 15, 2024
(a) When a misfire is discovered, the blaster shall provide proper safeguards and notify his employer.
(b) No work shall be done except that necessary to remove the hazard of the misfire and only those employees necessary to do the work shall remain in the blast area.
(c) When broken wires, faulty connections or short circuits are determined to be the cause of a misfire, proper repairs shall be made and the charge refired, provided the burden has not been dangerously weakened.
(d) When the blast hole cannot be refired, the stemming may be removed from the misfired blast hole by the use of compressed air, water, or other suitable means. A new priming charge may be added, the hole restemmed, and fired providing there is no danger of fly-rock or other hazards. The use of the drill to remove stemming shall be prohibited.
(e) When unfired explosives are found in a muck pile all loading work shall be stopped. The pieces of explosives and broken rock shall be carefully removed by hand until the unfired hole is exposed. If there is no danger of fly-rock from the weakened burdens, the blaster may reprime the hole and fire. If there is a danger of fly-rock, the unfired explosives in the hole shall be washed out with water.
(f) If conditions preclude the procedure described in (e) above, the blaster in charge shall safeguard the area and notify the appropriate officials of the Division of Public Safety and Occupational Safety and Health. All work in the blast area shall cease pending a joint investigation by the blaster and the appropriate officials of the Division of Public Safety and Occupational Safety and Health.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.21 - Breaking boulders

Current through Register Vol. 56, No. 14, July 15, 2024
(a) While loading block holes, other work shall not be allowed in the immediate area.
(b) Block holes shall contain at least 85 percent stemming material.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.22 - Bulk loading

Current through Register Vol. 56, No. 14, July 15, 2024
(a) No person shall drive a vehicle or equipment over electric blasting caps, leg wires, connecting wires, detonating cord, loaded blast holes or other explosive materials.
(b) Liners shall not be used in blast holes, unless proper precautions are taken to prevent the accumulation of static electricity.
(c) Only truck mounted or portable units for mixing or loading blasting agents shall be used.
(d) The mixing and loading of blasting agents at the blast site for immediate use may be permitted under the following conditions;
1. When under the direct supervision of a licensed blaster;
2. When in a reasonably safe location, considering the quantities involved;
3. When using equipment, materials and methods approved by the commissioner as adequate to provide for proper and safe mixture without frictional heating, compaction or confinement; and
4. When in quantities at locations which are appropriate for storage, handling and transportation of blasting agents.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.23 - Pneumatic loading of explosives

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Pneumatic loading equipment shall be constructed of materials compatible with the type of explosive materials to be used.
(b) Pneumatic loading equipment shall be used according to the recommendation of its manufacturer.
(c) A positive grounding device shall be used to prevent the accumulation of static electricity in the system. The ground shall be separated from any water line, air line, rail or permanent electrical grounding system.
(d) The air supply hose shall be nonconductive.
(e) The discharge hose shall be semi-conductive.
(f) All systems shall be evaluated by a competent person to insure that they will adequately dissipate static under potential field conditions.
(g) The compressed air supply shall be free of solid particles greater than 20 mesh size.
(h) The air pressure to the pneumatic loader shall not exceed the recommendations of the manufacturer. If necessary the supply shall be controlled by a pressure regulating valve in the air supply line. A pressure relief valve set at 10 percent above the loader's operating pressure shall be placed in the line ahead of the regulating valve.
(i) The temperature of the air supplied to the pneumatic loader shall not exceed 150 degrees F.
(j) When electric detonators are used, the leg wires shall be placed outside the discharge hose and kept away from the metal parts of the loader.
(k) The pneumatic loader shall not be used to place stemming in the blast hole.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.24 - Demolition

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Any person responsible for demolition by explosives shall comply with all applicable provisions of this Explosives Act, 21:1A-128 et seq., and these rules.
(b) A person intending to demolish by explosives any construction shall notify the appropriate officials of the Division of Public Safety and Occupational Safety and Health at least 14 days in advance of the demolition.
(c) Where a construction is to be demolished by explosives the notification required by (b) above shall be in writing and provide the following information:
1. Name, address and owner of the construction to be demolished;
2. Name of the general contractor at the demolition site;
3. Name of the blasting contractor at the demolition site;
4. Height and type of construction to be demolished;
5. A control map on a scale sufficient to show all constructions, streets, utilities and other pertinent objects within 300 feet of the demolition site;
6. Name and address of the public official responsible for traffic safety in the vicinity of the demolition site;
7. Name and address of the construction official having jurisdiction over the demolition site; and
8. Name and address of the fire official having jurisdiction over the demolition site.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.25 - Air blast effects

Current through Register Vol. 56, No. 14, July 15, 2024
(a) This section shall apply to air blast effects on a construction that is neither owned nor leased by the person conducting or contracting for the blasting operation closest to the nearest explosives to be detonated.
(b) All blasting shall be monitored by the blaster to determine air blast effects using an approved instrument operated by a competent person.
(c) The maximum allowable air blast at any building resulting from blasting operations shall not exceed 130 decibels peak when accurately measured by an instrument having a flat frequency response (+/-3 decibels) over the range of at least 6 to 200 Hertz.
(d) The maximum allowable air blast at any building resulting from blasting operations relative to demolition of structure work only shall not exceed 140 decibels peak when measured by an instrument having a flat response (+/-3 decibels) over the range of at least 6 to 200 Hertz.
(e) When blasting is of a continuing nature, 124 to 130 decibels shall be the caution range. When air blast effects are consistently within the caution range on six separate blasts, the blast shall be examined and changed so as to reduce air blast effects on subsequent blasts.
(f) For determining compliance with this section, an approved instrument that is operated by a competent person shall be used. An instrument is considered to be approved only when the instrument has been calibrated in accordance with the manufacturer's recommendations.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 7 - USE OF EXPLOSIVES › Section 12:190-7.26 - Ground vibration

Current through Register Vol. 56, No. 14, July 15, 2024
(a) This section shall apply to ground vibrations on a construction closest to the nearest loaded blast hole to be detonated that are neither owned nor leased by the person conducting or contracting for the blasting operation.
(b) In planning any blast, precautions shall be taken to protect construction from damage.
(c) The limits for ground vibration when blasting shall be in accordance with Table 7.26(e) or (f) below. In no case shall the peak particle velocity at a construction exceed two inches per second except when permitted by N.J.A.C. 12:190-1.6.
(d) If the ground vibrations are not within the blasting criteria of (e) below due to either blast design or geological conditions, the Commissioner may require a modified control method for the blast site.
(e) This subsection shall apply to ground vibration limits for blasting operations.
1. The blasting shall be conducted so that the low frequency ground vibration does not exceed the limits of Figure 7.26(e).
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New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 9 - BLASTING AGENTS › Section 12:190-9.1 - Scope of subchapter

Current through Register Vol. 56, No. 14, July 15, 2024
(a) This subchapter shall apply to the storage, handling and mixing of blasting agents.
(b) Unless otherwise set forth in this chapter, blasting agents shall be stored in the same manner as other explosives.
(c) The construction and operation of motor vehicles for the bulk delivery and mixing of blasting agents in transportation off-the-highway shall comply with the applicable sections of N.J.A.C. 12:190-6.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 9 - BLASTING AGENTS › Section 12:190-9.2 - Location of mixing facilities

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Buildings or other facilities used for mixing blasting agents shall be located, with respect to inhabited buildings, passenger railroads and public highways in accordance with N.J.A.C. 12:190-5.
(b) In determining the distance separating highways, railroads, and inhabited buildings from mixing facilities, the sum of all masses which may propagate from either individual or combined donor masses shall be included in the calculations. However, when ammonium nitrate must be included only 50 percent of its weight shall be used.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 9 - BLASTING AGENTS › Section 12:190-9.4 - Equipment used in mixing

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Equipment used for mixing blasting agents shall conform to this section.
(b) The design of the mixer shall minimize the possibility of frictional heat, compaction, and especially confinement. All bearings and drive assemblies shall be mounted outside the mixer and be protected against accumulations of dust. All surfaces shall be accessible for cleaning.
(c) Mixing and packaging equipment shall be constructed of materials compatible with the fuel-ammonium nitrate composition.
(d) Suitable means shall be provided to prevent the flow of fuel oil to the mixer. In gravity flow systems, an automatic springloaded shutoff valve with a fusible link shall be installed.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 9 - BLASTING AGENTS › Section 12:190-9.5 - Compositions

Current through Register Vol. 56, No. 14, July 15, 2024
(a) The provisions of this section shall be considered when determining blasting agent compositions.
(b) The sensitivity of the blasting agent shall be determined by means of a No. 8 blasting cap at regular intervals after every change in formulation, or as may be required by the Commissioner.
(c) Oxidizers of small particle size, such as crushed ammonium nitrate prills or fines, may be more sensitive than coarser products and shall be handled with greater care.
(d) No hydrocarbon liquid fuel with flash point lower than that of No. 2 fuel oil (125 degrees F minimum or legal) shall be used.
(e) Crude oil and crankcase oil shall not be used because they may contain light ends that offer increased vapor-explosion hazards or gritty particles that tend to sensitize the resulting blasting agent.
(f) Peroxides and chlorates shall not be used.
(g) Metal powders, such as aluminum shall be kept dry and shall be stored in containers or bins which are moisture-resistant or weather-tight. Solid fuels shall be used to minimize dust explosion hazards.
(h) The provisions of (d), (e) and (f) above shall not apply to compositions made under the supervision of a qualified person engaged in research and development capable of determining the overall hazard of the resulting product in its manufacture, storage, or use.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 9 - BLASTING AGENTS › Section 12:190-9.6 - Precautions at mixing plants

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Precautions at mixing plants shall include the following as provided by this section.
(b) Floors shall be constructed so as to eliminate floor drains and piping into which molten materials could flow and be confined in case of fire.
(c) The floors and equipment of the mixing and packaging room shall be cleaned regularly and thoroughly to prevent accumulation of oxidizers, fuels, or other sensitizers.
(d) The entire mixing and packaging building shall be cleaned regularly and thoroughly to prevent excessive accumulation of dust.
(e) Casual sources of ignition and firearms (except firearms carried by guards when authorized by police authorities) shall not be permitted inside of or within 50 feet of any building or facility used for the mixing of blasting agents.
(f) The land surrounding the mixing building shall be kept clear of brush, dried grass, leaves and other combustible materials for a distance of at least 25 feet.
(g) Empty ammonium nitrate bags shall be disposed of in a safe manner daily.
(h) No welding shall be permitted or open flames used in or around the mixing or storage area of the plant unless the equipment or area has been completely washed down and all oxidizing material removed.
(i) Before welding or repairs to hollow shafts, all oxidizing material shall be removed from the outside and inside of the shaft and the shaft vented with a minimum one half inch diameter opening.
(j) Explosives shall not be stored inside of or within 50 feet of any building or facility used for the mixing of blasting agents.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 9 - BLASTING AGENTS › Section 12:190-9.7 - Pneumatic unloading from bulk mix delivery motor vehicles

Current through Register Vol. 56, No. 14, July 15, 2024
(a) Pneumatic loading from bulk mix delivery motor vehicles into blast holes primed with electric blasting caps or other static-sensitive systems shall conform to this section.
(b) A positive grounding device shall be used to prevent the accumulation of static electricity.
(c) A discharge hose shall be used that has a resistance range that will prevent conducting stray currents, but that is conductive enough to bleed off static buildup.
(d) A qualified person shall evaluate all systems to determine if they will adequately dissipate static under potential field conditions.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 9 - BLASTING AGENTS › Section 12:190-9.8 - Bulk storage bins

Current through Register Vol. 56, No. 14, July 15, 2024
(a) The bin shall be a Type 4 magazine and shall be waterproof.
(b) The bin, including supports, shall be constructed of compatible materials, and adequately supported and braced to withstand the combination of all loads, including impact forces arising from product movement within the bin and accidental vehicle contact with the support legs.
(c) The bin discharge gate shall be designed to provide a closure tight enough to prevent leakage of the stored product. Provision shall also be made so that the gate can be locked.
(d) Bin loading manways or access hatches shall be hinged or otherwise attached to the bin and be designed to permit locking.
(e) Any electrically driven conveyors for loading or unloading bins shall conform to the National Electrical Code, NFPA No. 70-1987. The conveyors shall be designed to minimize damage from corrosion.
(f) Bins containing blasting agents shall be located in accordance with Table 5.10 of N.J.A.C. 12:190-5.
(g) Bins containing ammonium nitrate shall be separated from blasting agent storage and other explosives storage in accordance with Table 5.10 of N.J.A.C. 12:190-5.
(h) Good housekeeping practices shall be maintained around any bin containing ammonium nitrate or blasting agents. This includes keeping weeds and other combustible materials cleared within 25 feet of such bin. Accumulation of spilled product on the ground shall be prevented.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 9 - BLASTING AGENTS › Section 12:190-9.9 - Storage of blasting agents and supplies

Current through Register Vol. 56, No. 14, July 15, 2024
(a) This section shall apply to the storage of blasting agents and oxidizers used for mixing of blasting agents.
(b) Blasting agents or ammonium nitrate, when stored in conjunction with explosives, shall be stored as provided in N.J.A.C. 12:190-5. The mass of blasting agents and one-half the mass of ammonium nitrate shall be included when computing the total quantity of explosive materials for determining distance.
(c) Blasting agents, when stored entirely separate from explosives, shall be stored in a Type 4 magazine or a magazine of higher classification (lower number).
(d) Magazines in which blasting agents are stored shall be constructed so as to eliminate open floor drains and piping into which molten materials could flow and be confined in case of fire.
(e) Semi-trailers or full-trailers used for highway or on-site transportation of the blasting agents may be used for temporarily storing these materials, provided they are located in accordance with N.J.A.C. 12:90-5. Trailers shall be provided with substantial means for locking, and the trailer doors shall be kept locked, except during the time of placement and removal of stocks of blasting agents.
(f) Piles of ammonium nitrate and warehouses containing ammonium nitrate shall be separated adequately from readily combustible fuels.
(g) Caked oxidizers, either in bags or in bulk, shall not be loosened by blasting.
(h) Every magazine used for the storage of blasting agents shall be under the supervision of a competent person who shall be not less than 21 years of age.
New Jersey Administrative Code › Title 12 - LABOR AND WORKFORCE DEVELOPMENT › Chapter 190 - EXPLOSIVES › Subchapter 10 - SMOKELESS POWDER AND BLACK POWDER › Section 12:190-10.1 - Scope of subchapter

Current through Register Vol. 56, No. 14, July 15, 2024
(a) This subchapter shall apply to:
1. The storage of smokeless powder and black powder for the reloading of small arms ammunition; and
2. The channels of distribution for the users of smokeless powder and black powder.