Section 90.209 - Respirable dust samples; report to operator(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;(6) The reason for voiding any sample; and(7) The part 90 miner's MSHA Individual Identification Number (MIIN).(b) Upon receipt, the operator shall provide a copy of this report to the part 90 miner. The operator shall not post the original or a copy of this report on the mine bulletin board.(c) If using a CPDM, the person certified in sampling shall print, sign, and provide to each part 90 miner, a paper record (Dust Data Card) of the sample run within one hour after the start of the part 90 miner's next work shift. 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 location within the mine from which the sample was 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;(5) The shift length; and(6) The part 90 miner's MSHA Individual Identification Number (MIIN).(d) The operator shall not post data on respirable dust samples for part 90 miners on the mine bulletin board.