30 CFR §70.211

1. (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. (1)The mine identification number;
   2. (2)The locations within the mine from which the samples were taken;
   3. (3)The concentration of respirable dust, expressed as an equivalent concentration for each valid sample;
   4. (4)The average equivalent concentration of respirable dust for all valid samples;
   5. (5)The occupation code, where applicable; and
   6. (6)The reason for voiding any sample.
2. (b)Upon receipt, the operator shall post this data for at least 31 days on the mine bulletin board.
3. (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. (1)The mine identification number;
   2. (2)The locations within the mine from which the samples were taken;
   3. (3)The concentration of respirable dust, expressed as an equivalent concentration reported and stored for each sample;
   4. (4)The sampling status conditions encountered for each sample; and
   5. (5)The shift length.
4. (d)The information required by paragraph (c) of this section shall remain posted until receipt of the MSHA report covering these respirable dust samples.