Administrative Code

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Virginia Administrative Code
Title 4. Conservation And Natural Resources
Agency 25. Department of Energy
Chapter 40. Safety and Health Regulations for Mineral Mining
11/28/2021

4VAC25-40-810. Recordkeeping.

A detailed record of each surface blast shall be prepared immediately by the certified blaster. Records shall be maintained at the mine site for three years and subject to inspection by the division mine inspectors. Records shall contain the following information:

1. Name of company or contractor;

2. Location, date, and time of blast;

3. Name, signature, and certification number of the certified blaster in charge;

4. Type of material blasted;

5. Number of holes, and burden and spacing for each hole;

6. Drill logs of boreholes as required by 4VAC25-40-1095;

7. Types of explosives used;

8. Total amount of explosives used;

9. Maximum amount of explosives per delay period of eight milliseconds or greater;

10. Method of firing and type of circuit;

11. Direction and distance in feet to nearest dwelling house, public building, school, church, commercial or institutional building neither owned nor leased by the person conducting the blasting;

12. Weather conditions (including such factors as wind directions, etc.);

13. Height or length of stemming for each hole;

14. Whether mats or other protections were used;

15. Type of detonators used and timing of detonation for each detonator used;

16. The person taking the seismograph reading shall accurately indicate exact location of seismograph, if used, and shall also show the distance of seismograph from blast;

17. Seismograph records, including:

a. Name and signature of the person operating the seismograph;

b. Name of the person analyzing the seismograph record; and

c. Seismograph readings;

18. When a permanently installed seismograph is used to prove compliance, the record shall indicate the:

a. Name of the person and company that installed the seismograph; and

b. Name, signature, and company affiliation of the person validating the authenticity of the seismic data collected and transmitted by the permanent unit.

The information should be attached to the blast record as soon as it is available, but in no instance later than five working days after the shot; and

19. All anomalies or abnormalities occurring during the execution of the blast and actions taken to correct or address them.

Statutory Authority

§§ 45.1-161.3, 45.1-161.294, and 45.1-161.305 of the Code of Virginia.

Historical Notes

Derived from VR480-05-1.2 § 6.4, eff. July 19, 1989; amended, Virginia Register Volume 14, Issue 17, eff. July 1, 1998; Volume 25, Issue 20, eff. July 8, 2009; Volume 35, Issue 4, eff. November 30, 2018.

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