MSHA HANDBOOK SERIES - PH13-V-1 - Mine Safety and Health ...

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GENERAL COAL MINE INSPECTION PROCEDURES AND INSPECTION TRACKING SYSTEM HANDBOOK CHAPTER 5 Chapter 5 - SAMPLING PROCEDURES A. Air Samples. The location of samples collected shall be no less than 12 inches from the roof, face, floor and ribs. Special collection media may be required to sample for the presence of dusts, fumes, mists, and vapors. The Pittsburgh Safety and Health Technology Center (PSHTC) should be contacted for guidance on special collection media. (Refer to the IPAL User’s Manual for instructions on filling out MSHA Form 2000-43, Mine Atmosphere Sample Record.) Air samples sent to the lab are routinely analyzed for five gases: carbon dioxide (CO2), oxygen (O2), methane (CH4), ethane (C2H6), and nitrogen (N2) (note: the results of nitrogen are not reported on the analysis of air sample report). The 10-milliliter (ml) air sample bottles or ‘vac-u-tainers ® ’ shall be used to collect this type of sample. Additionally, when collecting air samples in vac-u-tainers ® , a plunger (needle) shall be used to prevent contamination. When transferring air samples from gas sampling bags to air sample bottles, a double-sided plunger (needle) shall be used to prevent contamination. Air samples sent to the lab for fire gas analysis/calculations are routinely acetylene (C2H2), argon (Ar), carbon dioxide (CO2), carbon monoxide (CO), ethane (C2H6), ethylene (C2H4), hydrogen (H2), methane (CH4), nitrogen (N2), and oxygen (O2). For these gases and particularly for carbon monoxide (CO) and hydrogen (H2) analysis, 50-ml air sample bottles or bag containers shall be used. When collected, bag samples will be labeled with the date, time, person collecting the sample and the mine location. The bag should be filled two times and emptied after each filling by rolling the bag to expel any air. This process ensures that the gas sample bag has been purged of any contaminate atmosphere. The gas sample bag should then be filled to approximately ¾ full or ½ full if the sample is to be shipped by air. If analysis for carbon monoxide (CO), hydrogen (H2), or other constituents is needed, indicate the chemical by symbol in the remarks section of MSHA Form 2000- 43. Do not use ordinary 10-ml or 50-ml bottles to sample for sulfur dioxide (SO2), hydrogen sulfide (H2S), oxides of nitrogen, or aldehydes; special testing tubes or vessels are needed. Contact Tech Support for appropriate sample media and techniques. Air samples shall be collected to substantiate violations citing excessive methane (CH4), carbon monoxide (CO), carbon dioxide (CO2), and low oxygen (O2). When special samples are collected in connection with a problem arising at a mine or to substantiate a violation (e.g., less than 19.5 volume per centum of oxygen (O2), more than 0.5 volume per centum of carbon dioxide (CO2), harmful quantities of other noxious or poisonous gases), inform laboratory personnel of the problem involved. Mark the Mine Atmosphere Sample Record for special samples with a conspicuous Release 1 (February 2013) 5-1
GENERAL COAL MINE INSPECTION PROCEDURES AND INSPECTION TRACKING SYSTEM HANDBOOK CHAPTER 5 red “S” on the front of the MSHA Form 2000-43, IPAL printout in the upper left corner and on the outside shipment holder/mailer. Such samples are given preference over other samples and the analytical results will be promptly reported to the appropriate office. Procedures for Processing Air Samples taken to substantiate violations: a. Describe in the citation or order the location where the air samples were taken to substantiate the violation. b. Make a notation on the Mine Atmosphere Sample Record, in the “Remarks” section, stating the number of the citation or order, the initials of the inspector, and the date and time of issuance. Determine the number of samples necessary to calculate total methane liberation (TL) for a mine - All total methane liberation bottle samples should be collected and submitted for analysis the first month, or at the beginning of a newly opened event of the inspection quarter at mines that are on mandated 103(i) spot inspections. If possible, all air samples collected to satisfy the mine TL calculations should be collected on the E01 event; this helps the laboratory with the data retrieval and tracking process. If duplicate samples are collected at any location for any reason during a Regular Safety and Health Inspection, both samples shall be sent to the lab immediately but only one sample should be marked for use in the calculation of total methane liberation for the mine if taken in a TL sample (do not hold duplicate samples). To the extent possible, TL samples should be collected during normal production times so an accurate TL calculation can be conducted. If major air changes are planned in the early part of the inspection that may seriously affect the TL calculation the inspector may wait until those changes are made as long as the TL samples can be collected in a timely fashion. Where possible, mail the maximum number of samples that a holder/mailer will accommodate at one time. Send all air samples to the Gas Laboratory Dust Analysis Section within 3 working days (postmarked) of collection. Samples collected from more than one mine may be mailed in the same holder/mailer. A copy of the completed MSHA Form 2000-43 shall be included in the shipment holder/mailer, a copy submitted to the Mine Safety and Health Assistant, and a copy retained by the inspector until the analysis report is received. Mail all air samples (in accordance with postal regulations) to MSHA’s Gas Laboratory Dust Analysis Section at 100 Bluestone Road, Mount Hope, WV 25880-1000. The results of all air samples sent to the MSHA laboratory for analysis will be emailed to the appropriate field and district office supervisor and assistant. The results should be included with the inspection Release 1 (February 2013) 5-2
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MSHA HANDBOOK SERIES U. S. Departme
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TABLE OF CONTENTS Chapter 1 - INTRO
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19. Illumination of Work Areas ....
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V. Special Assessment .............
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COAL MINE SAFETY AND HEALTH GENERAL
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