Effective 28 Aug 2007

319.315. Retention of seismographic recordings, how long — records to include certain information. — 1. Seismograph recordings of the ground vibration and acoustic levels created by the use of explosives, when required by section 319.309, shall be retained for at least three years. Such recordings shall be made available to the division of fire safety within twenty-four hours of a request by any representative of the division of fire safety. Each seismograph recording and the accompanying records shall include the:

(1) Maximum ground vibration and acoustics levels recorded;

(2) Specific location of the seismograph equipment, its distance from the detonation of the explosives, the date of the recording, and the time of the recording;

(3) Name of the individual responsible for operation of the seismograph equipment and performing an analysis of each recording; and

(4) Type of seismograph instrument, its sensitivity and calibration signal or certification date of the last calibration.

2. When seismograph recordings of the use of explosives are required by section 319.309, a record of each such use of explosives shall be made and retained for at least three years. The record shall be completed by the end of the business day following the day in which the explosives were detonated. Such records shall be made available to the division of fire safety, upon request, within twenty-four hours of the request. Each record shall include the:

(1) Name of the person using the explosives;

(2) Location, date, and time of the detonation;

(3) Name of the licensed blaster responsible for use of the explosives;

(4) Type of material blasted;

(5) Number of bore holes, burden, and spacing;

(6) Diameter and depth of bore holes;

(7) Type of explosives used;

(8) Weight of explosives used per bore hole and total weight of explosives used;

(9) Maximum weight of explosives detonated within any eight millisecond period;

(10) Maximum number of bore holes or decks detonated within any eight millisecond period;

(11) Initiation system, including number of circuits and the timer interval, if a sequential timer is used;

(12) Type and length of stemming;

(13) Type of detonator and delay periods used, in milliseconds;

(14) Sketch of delay pattern, including decking;

(15) Distance and scaled distance, if required under the provisions of 319.309, to the nearest uncontrolled structure;

(16) Location of the nearest uncontrolled structure, using the best available information.

3. If the type of blasting being recorded by a seismograph does not involve bore holes, then the record required in subsection 2 of this section shall contain the:

(1) Name of the person using the explosives;

(2) Location, date, and time of the detonation;

(3) Name of the licensed blaster responsible for use of the explosives;

(4) Type of material blasted;

(5) Type of explosives used;

(6) Weight of explosives used per shot and total weight of explosives used;

(7) Maximum weight of explosives detonated within any eight millisecond period;

(8) Initiation system, including number of circuits and the timer interval, if a sequential timer is used;

(9) Type of detonator and delay periods used, in milliseconds;

(10) Sketch of delay pattern;

(11) Distance and scaled distance, if required under the provisions of section 319.309, to the nearest uncontrolled structure;

(12) Location of the nearest uncontrolled structure, using the best available information.

4. It shall be the duty of each licensed blaster and each person using explosives to assure that the requirements of this section are met. Any person using explosives shall provide properly calibrated seismographic equipment at the closest practical proximity to the nearest uncontrolled structure, or at the option of the person using explosives the seismograph equipment may be located nearer to the blast site on an approximate line between the nearest uncontrolled structure and the blast site. Licensed blasters shall create the record required in subsections 2 and 3 of this section and provide such record to the person using explosives, who shall be responsible for maintaining records required in this section.

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(L. 2007 H.B. 298)