Program Policy Manual - VOLUME V - Mine Safety and Health ...

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MSHA PROGRAM POLICY MANUAL VOLUME V b. Personnel working at or near a dust-generating source. c. Respirable dust sample(s) collected in the proposed area during the last year which has exceeded 1.0 mg/m 3 or a reduced standard of 1.0 mg/m 3 or less. d. The coal mine operator submitting additional designated area sampling locations for approval at any time. 7. Removing Designated Areas From Sampling Status: If each of the valid respirable dust samples collected from a DA by the operator during a 1-year period indicates a respirable dust concentration at or below 1.0 mg/m 3 when on a 2.0 mg/m 3 standard or at or below the applicable standard when on a reduced standard of 1.0 mg/m 3 or less, the district manager may remove the DA from sampling status provided: a. At least one valid sample has been collected from the same DA within the same 1-year period by MSHA, and b. Each respirable dust sample taken by MSHA indicates a respirable dust concentration at or below 1.0 mg/m 3 when on a 2.0 mg/m 3 standard or at or below the applicable standard when on a 1.0 mg/m 3 standard or less, and c. A minimum of five valid respirable dust samples have been taken in the same DA. These five valid samples consist of a combination of MSHA and operator samples. This only allows the operator to stop sampling the DA. Since the previous samples only indicated that the dust control measures were adequate, dust control parameters stipulated in the approved dust control plan shall not be changed unless the changes have been evaluated based on MSHA samples. Between the 6-month reviews of dust control plans, it is not unusual for the physical layout of a mine to change, thus requiring some DAs to be placed in a nonproducing or abandoned status. When the physical layout of a mine changes, new DAs for that mine are not established until the next 6-month review February 2003 (Release V-33) 19
MSHA PROGRAM POLICY MANUAL VOLUME V period. However, when status changes occur between 6-month reviews, (i.e., from nonproducing to producing) normal bimonthly sampling will commence during the bimonthly cycle in which the status change occurs. In addition to uniquely identifying the DA to be sampled, the four-digit identification number or entity number identifies the type of DA. The following is a list of the DA types with corresponding codes assigned by MSHA which are required to be entered on the respirable dust data card accompanying each sample: Numeric Designation DA Type Description 100-0 through 199-9 Track haulage 200-0 through 299-9 Belt area 300-0 through 399-9 Trackless haulage 400-0 through 499-9 Shops 500-0 through 599-9 Section dumping points 600-0 through 699-9 Rotary dumps and crushers 700-0 through 799-9 Miscellaneous 800-0 through 899-9 Intake Airways 900-0 through 999-9 Roof Bolters 70.209 Respirable Dust Samples; Transmission by Operator (b) Any time a citation is issued in accordance with this provision, all pertinent information shall be submitted to the Senior Special Investigator in the district. Based on the facts, this investigator will determine if further investigation and enforcement actions are warranted. (c) When filling out each dust data card, it is important that the correct sample type be entered in the box provided. The environment sampled should be numbered as follows: U.G. Designated Occupation ....................1 U.G. Nondesignated Occupation..................2 U.G. Designated Area...........................3 Surface Designated Work Position...............4 Part 90 .......................................5 U.G. Nonface Occupations.......................6 U.G. Intake Air ...............................7 Surface Nondesignated Work Position ...........8 Code numbers 1 through 5 will be used by coal operators and MSHA inspectors, while numbers 6 through 8 will be used exclusively by MSHA inspectors only. Code number 2 is to be used by MSHA inspectors when an underground nondesignated occupation is sampled. The only time an operator would use code 2 would be February 2003 (Release V-33) 20
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