For each situation where surface blasting is necessary, a blast design, prepared and signed by a certified
<br />blaster, will be submitted to the CDRMS prior to the blast. The blast design will contain sketches of typical
<br />drill patterns, delay periods and decking, and will indicate the type and amount of explosives to be used,
<br />critical dimensions and descriptions of any structures to be protected, and design factors used to protect the
<br />public and meet applicable airblast, flyrock, and ground vibration standards of Rule 4.08. Blast designs
<br />will be submitted to the CDRMS for incorporation into Exhibit 50, Blast Design and Reporting Information
<br />prior to the blast.
<br />• So long as there are no structums or dwellings (owned by parties other than the mine operator) within one-
<br />halfmile of the blast location, no pre-blast survey will be required.
<br />• So long as the amount of explosives per blast does not exceed 5 pounds, requirements for publication and
<br />distribution of a blasting schedule are not applicable.
<br />• Any blasting will be conducted between sunrise and sunset, unless a prepazed blast is delayed due to
<br />unavoidable hazardous conditions and cannot be further delayed without creating a potential safety hazard
<br />that cannot be adequately mitigated, Should blasting be required at other times, TCC will comply with
<br />applicable provisions of Rule 4.08.4(1)(b).
<br />• Blast warning and all-clear signals, audible up to one-half mile from the blast area will be used, and any
<br />individuals who reside or regularly work within one-half mile of the blast will be instructed on the meaning
<br />of the signals.
<br />• So long as there are no residents or owners of dwellings or structures within one-half mile of the blast,
<br />requirements for 24-hour notification prior to any blast, are not applicable.
<br />• Consistent with applicable requirements of Rule 4.02.6, any blasting area will be conspicuously flagged or
<br />posted, and conspicuous signs stating "Warning! Explosives in Use", and explaining marking of blast areas
<br />and blasting and all-clear signals, will be posted at all entrances to the permit area from public roads.
<br />• Access to any area(s) potentially subject to flyrock or slides as a result of blasting will be controlled during
<br />and following blasting activities, until a qualified person checks the area and signals all-clear.
<br />• Except where lesser distances are approved by the CDRMS, blasting will not be conducted within 1,000
<br />feet of a dwelling, public building, school, church, hospital or nursing facility, community or institutional
<br />building; nor within 500 feet of disposal wells, petroleum or gas storage facilities, municipal water storage
<br />facilities, fluid transmission pipelines, gas or oil collection lines, or water or sewage lines. Any facility or
<br />structure that falls within these distance limits will be identified in the blast design, along with distance and
<br />specific protective measures, subject to review and approval by the CDRMS under applicable provisions of
<br />Rule 4.08.4(7).
<br />Any blasting will be conducted to prevent personal injury, damage to public or private properly, adverse
<br />impacts to underground mine workings, and change in the course, channel, or availability of surface or
<br />ground water. Any blasting with 500 feet of active underground mines will require approval of State and
<br />Federal mine safety officials.
<br />• The blast design, prepared and signed by a certified blaster for each situation where surface blasting may be
<br />necessary, will address design provisions necessary to control;
<br />l . Airblast, so that it does not exceed the table values given in Rule 4.08.4(6)(a)
<br />2. Flyrock, so that it is not cast more than half the distance to the nearest dwelling or occupied
<br />structure, and in no case beyond the pennittee's property line or area of regulated access
<br />3. Ground vibration, so that the maximum peak particle velocity does not exceed the table or
<br />calculated values given in Rule 4.08(10). [f the maximum peak particle velocity is not exceeded,
<br />based on table or calculated values, requirements for measurement of peak particle velocities using
<br />a seismograph are not applicable.
<br />MR06-213 2.05-85.1 11/13/06
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