Section 70.211 - Respirable dust samples; report to operator; posting(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(d) The information required by paragraph (c) of this section shall remain posted until receipt of the MSHA report covering these respirable dust samples.