Current through Register Vol. 56, No. 6, March 18, 2024
(a) In addition to the recordkeeping of 12:190-3.1 5, holders of a "permit to use" explosives shall comply with this section.
(b) The person having a "permit to use" explosives shall maintain a permanent record of each blast. At least one copy of this record shall be maintained at the mining office or construction site. In the absence of a blast site office, the record shall be maintained at the principal place of business of the employer.
(c) The person having a "permit to use" explosives shall maintain a record of each blast which shall include the following:
1. Name and address of person responsible for the project;
2. Name and permit number of blaster in charge;
3. Name, address and specific locations at the address of the blasting project;
4. Identification number for each blast in sequence by project on an annual basis;
5. Date and time of the blast;
6. General type of material blasted;
7. Nature of blasting, such as bank, trench or pre-split;
8. Weather conditions, including wind speed direction, temperature, and sky conditions;
9. Blast hole description, including hole sizes, inclinations, depths, sub-drilling, number of holes, burden spacing, and number of rows of holes;
10. Depth of stemming;
11. Depth and placement locations of decking used;
12. Kind of explosives used;
13. Total amount of explosives used;
14. Maximum amount of explosives fired on any time delay period;
15. The number of holes fired included in the maximum pounds per delay;
16. Number, brand name and type of electric blasting caps used and the number of individual delay periods;
17. Actual firing time where electric delay blasting caps do not fall within the manufacturer's sequence of delay time;
18. Size and total length of detonating cord, when used, delay periods, and type of precaution to deaden sound effects;
19. All pertinent information on delay periods, when other nonelectric initiating systems are used;
20. A plan indicating blast hole layout and a cross-section of a blast hole showing the maximum pounds per delay, burden, spacing, depth of hole, subdrilling, stemming depth, decking location, and locations of detonators and explosives.
21. The horizontal distance and direction to the nearest construction from the blast site, that is neither owned nor leased by the person conducting or contracting for the blasting operation closest to the nearest loaded blast hole to be detonated; and
22. The names of the instruments, operator, interpreter and statement of compliance in accordance with (f) below.
(d) When more than one similar blast is to be conducted in a single day, one form may be utilized for compliance with (c) above, provided the number of blasts is included and all applicable questions are answered for each blast.
(e) The person having a "permit to use" explosives shall maintain a record of all misfires which shall include the following:
1. The address and involved portion of the mine or construction site;
2. The date of misfire;
3. The number of holes involved in the misfire;
4. The cause of the misfire;
5. The method used to reblast the misfire;
6. The name of the blaster in responsible charge of handling the misfire; and
7. The signature of the blaster making the report.
(f) When required by N.J.A.C. 12:190-7, the person holding a "permit to use" explosives shall maintain a record of ground vibration readings and air blast effect readings, which shall include the following:
1. Identification of the instrument used;
2. The name of the observer;
3. The name of the interpreter;
4. The distance in feet and direction of the nearest construction from the blast site that is neither owned nor leased by the person conducting or contracting for the blasting operation closest to the nearest loaded blast hole to be detonated;
5. The distance in feet and direction of the instrument locations from the blast site;
6. The type of surface at the instrument location;
7. The maximum peak particle velocity of any one of the three mutually perpendicular components of the ground motion in the vertical and horizontal directions at the specific location in inches per second and the frequency range of the blast; and
8. The sound measurement in decibels measured on the linear frequency response or the overpressure in pounds per square inch.
