Section 810. Recordkeeping

A detailed record of each surface blast shall be prepared immediately by the certified blaster. Records shall be maintained 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;

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 seismograph readings, where required:

a. Name and signature of person operating seismograph;

b. Name of person analyzing the seismograph record; and

c. Seismograph reading;

18. Maximum number of holes per delay period of eight milliseconds or greater; and

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

Historical Notes

Derived from VR480-05-1.2 § 6.4, eff. July 19, 1989; amended, Volume 14, Issue 17, eff. July 1, 1998; Volume 25, Issue 20, eff. July 8, 2009.

Statutory Authority

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