Current through Register Vol. 48, No. 12, March 22, 2024
a) A record of each blast, including
seismograph reports, shall be retained by the operator for at least three (3)
years and shall be available for inspection by the Department and the public on
request. The record is to be completed by the end of the work day following the
day in which the blast occurred, including the seismograph meter reading, if
available, and shall contain the following data:
1) Name of the operator conducting the
blast;
2) Location, date, and time
of blast;
3) Name, signature, and
certification number of the blaster conducting the blast;
4) The name of the owner or resident of, and
the direction and distance, in feet, to the nearest dwelling, school, church,
or commercial, or institutional building either:
A) Not located in the permit area;
or
B) Not owned by the person who
conducts the surface mining activities.
5) Type of material blasted;
6) Number of holes, burden, and
spacing;
7) Diameter and depth of
holes;
8) Types of explosives
used;
9) Total weight of explosives
used;
10) Weight of explosives used
per hole;
11) Maximum weight of
explosives detonated within any eight (8) millisecond period;
12) Maximum number of holes or decks
detonated within any eight (8) millisecond period;
13) Initiation system;
14) Type and length of stemming;
15) Type of delay detonator and delay periods
used;
16) Sketch of the delay
pattern, including decking;
17)
Reasons and conditions for each unscheduled blast;
18) Wind velocity and direction;
and
19) Weather conditions,
including those which may cause possible adverse blasting effects.
b) Air blast and/or ground
vibration recordings, or photographic copies thereof, where required, shall be
kept at the mine site office for a period of three (3) years following the date
of the blast, and shall be available for inspection by the Department and the
public on request. The recordings shall include the following:
1) Maximum air blast and/or ground vibration
levels recorded;
2) The exact
location of the monitoring equipment, and its distance from the blast, and the
date and time of the recording;
3)
Name of the person and firm making the recording;
4) Name of the person and firm analyzing the
recording. The recording shall be signed and dated by the person performing the
analysis; and
5) The type of
instrument, sensitivity, and calibration signal or certification of annual
calibration. When the recordings required at Sections
1816.67(c)
and
1816.67(g)
are produced via digitized systems, the sampling rate of the digitizer, in
samples per second, shall be stated.