A record of each blast shall be kept. All records, including seismograph reports, shall be retained for at least 3 years, be available for inspection, and include the following items:
  • Name of company or contractor
  • Location, date, and time of blast
  • Name, signature, and Social Security number of blaster in charge
  • Type of material blasted
  • Number of holes, burden, and spacing
  • Diameter and depth of holes
  • Type of explosives used
  • Total amount of explosives used
  • Maximum amount of explosives per delay period of 8 milliseconds or greater
  • Method of firing and type of circuit
  • Direction and distance in feet to nearest dwelling house, public building, school, church, and commercial or institutional building not owned or leased by the person conducting the blasting
  • Weather conditions including such factors as wind direction, etc.
  • Height or length of stemming
  • If mats or other protection to prevent fly rock were used
  • Type of detonators used and delay period used
  • Seismograph records including seismograph readings when required containing:
    1. Name and signature of the individual operating the seismograph
    2. Name of the individual analyzing the seismograph records
    3. Seismograph reading
    4. The maximum number of holes per delay period of 8 milliseconds or greater
The person taking the seismograph reading shall accurately indicate the exact location of the seismograph, if used, and shall also show the distance of the seismograph from the blast.