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59 FR 8327, Feb 18, 1994, unless otherwise noted.
79 FR 24974, May 1, 2014, unless otherwise noted.
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(a) MSHA shall provide the operator, as soon as practicable, a report with the following data on respirable dust samples submitted or whose results were transmitted electronically, if using a CPDM, in accordance with this part:
(1) The mine identification number;
(2) The locations within the mine from which the samples were taken;
(3) The concentration of respirable dust, expressed as an equivalent concentration for each valid sample;
(4) The average equivalent concentration of respirable dust for all valid samples;
(5) The occupation code, where applicable; and
(6) The reason for voiding any sample.
(b) Upon receipt, the operator shall post this data for at least 31 days on the mine bulletin board.
(c) If using a CPDM, the person certified in sampling shall, within 12 hours after the end of each sampling shift, print, sign, and post on the mine bulletin board a paper record (Dust Data Card) of the sample run. This hard-copy record shall include the data entered when the sample run was first programmed, and the following:
(1) The mine identification number;
(2) The locations within the mine from which the samples were taken;
(3) The concentration of respirable dust, expressed as an equivalent concentration reported and stored for each sample;
(4) The sampling status conditions encountered for each sample; and
(5) The shift length.
(d) The information required by paragraph (c) of this section shall remain posted until receipt of the MSHA report covering these respirable dust samples.