§870.20 — How to calculate excess moisture in LOW-rank coals. Here are the requirements for calculating the excess moisture in low-rank coals for a calendar quarter. ASTM standards D2234-89, Standard Test Methods for Collection of a Gross Sample of Coal; D3302-91, Standard Test Method for Total Moisture in Coal; and, D1412-93, Standard Test Method for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30 °C are incorporated by reference as published in the 1994 Annual Book of ASTM Standards, Volume 05.05. The Director of the Federal Register approved this incorporation by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Each applicable ASTM standard is incorporated as it exists on the date of the approval, and a notice of any change in it will be published in the Federal Register. You may obtain copies from the ASTM, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania 19428. A copy of the ASTM standards is available for inspection at the Office of Surface Mining Reclamation and Enforcement, Administrative Record, Room 101, 1951 Constitution Avenue, NW., Washington, DC, or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
| (a) (1) Calculate the excess moisture percentage using one of these equations: ER06NO97.003 |
(2) EM equals excess moisture percentage. TM equals total as-shipped moisture percentage calculated according to Table 1 of this section. IM equals inherent moisture percentage calculated according to Tables 2 and 3 of this section. |
|
(b) Multiply the excess moisture percentage by the tonnage from the bona fide sales, transfers of ownership, or uses by the operator during the quarter. Table 1 | Calculating TOTAL Moisture percentage in LOW-rank coals¹ |
|---|
| Collect and test each day you ship or use coal ▾ | Convert daily results to quarterly figures and report them ▾ |
|---|
| Collect a sample of as-shipped or used coal. Follow procedures in ASTM D2234-B9. | Convert daily total moisture percentage to quarterly total moisture percentage: | | 1. Multiply daily total moisture percentage by daily tonnage shipped or used. You now have daily total moisture tonnage. | | 2. Add up daily total moisture tonnage for the quarter | | Test the sample for daily total moisture percentage. Follow laboratory procedures in ASTM D3302-91 | 3. Add up daily tonnage shipped or used in the quarter. | | 4. Divide 2 by 3. | | Obtain prior OSM approval for use of other procedures. | Report this total moisture percentage in high-rank coal for the quarter on OSM-1, Coal Reclamation Fee Report. |
¹ See §870.20 for the incorporation by reference of the ASTM standards. Table 2 | Calculating INHERENT Moisture percentage in LOW-rank coals¹ |
|---|
| Collect and test once a month ▾ | Convert test results to quarterly figures and report them ▾ |
|---|
| Collect 1 sample of as-shipped coal. Follow procedures in ASTM D2234-B9. | Calculate inherent moisture percentage for the quarter: | | • Average the 3 equilibrium moisture results from your monthly tests. | | • Add to this average a Correction Factor that you calculate for the first quarter according to Table 3 below. | | Test the sample for equilibrium moisture. Follow laboratory procedures in ASTM D1412-93. | Report this inherent moisture percentage for the quarter on OSM-1. |
¹ See §870.20 for the incorporation by reference of the ASTM standards. Table 3 | Calculating the Correction Factor for Table 2¹ |
|---|
| Collect and test in the first quarter a deduction is taken ▾ | Convert test results into a correction factor for all quarterly reports ▾ |
|---|
| Collect 15 samples that are representative of the entire seam from a freshly exposed, unweathered coal seam face. Follow procedures in ASTM D1412-93 Appendix X1. | Use the test results to calculate a correction factor:• Average the 15 inherent moisture results from your tests. • Average the 15 equilibrium moisture results from your tests. • Subtract the average equilibrium moisture from the average inherent moisture. | | Test each sample for two things:Follow laboratory procedures in ASTM D1412-93 Appendix X1. | You now have a correction factor for the first quarter the deduction is taken, and all later quarters. Use it in Table 2 above. you may change the correction factor at any time by repeating the steps in this table.A correction factor applies to only the bench you sample. If you mine multiple benches or seams simultaneously, you may combine the sample results from the different benches or seams to calculate an average correction factor. You may update the correction factor by repeating the procedures or incorporating new test results with the initial result. |
¹ See §870.20 for the incorporation by reference of the ASTM standards. |
[62 FR 60146, Nov. 6, 1997, as amended at 75 FR 60276, Sept. 29, 2010]