AS 3980:2016 Determination of gas content of coal and carbonaceous material- -| Direct desorption method
11.8 Measurement of uncertainty
Laboratories shall develop and apply procedures to estimate the uncertainty of their gas content and gas composition measurements. Actual procedures will vary with laboratory equipment/method of estimation‘Bottom up’ (see ISO/IEC Guide 98-3) or ‘Top down’ (see Nordtest TR537, Eurolab 1/2007 or NATA Technical Note 33), or combination.
Guidelines for generic calculations of uncertainty are provided in Appendix B (Paragraphs B6 and B7) and Appendix D (Paragraph D5).
12 DATA R ETENTION
For each sample, records of all readings observations and calculations shall be retained by the laboratory for sufficient time to allow verification of reported results or a longer period if required by the client or regulatory authority.
13.2 Hole and sample identification
Data shall be reported as follows:
(a) Identification of laboratory (name and address) including name of external laboratory if subcontracted out the analysis.
(b) Purpose of test (e.g. outburst, resource, emissions, shale).
(c) Laboratory methodology (including version or date).
(d) Sampling location as follows:
(i) For surface drilling Exploration (project) area， borehole identification ( number)，borehole coordinates and borehole collar datum (include details of coordinate system and height datum of borehole collar/kelly bushing height- allows sample depth to be adjusted to ground surface where a reference point other than the ground surface is used)， core retrieval method (wireline, conventional).
(ii) For underground Colliery name， sample location (e.g. district/panel/cut- through, etc.), borehole name, collar coordinates ( for borehole sample), depth below ground level of sample (for lump sample) or location of borehole for bore core sample. Depth/distance down and/or along borehole for bore core sample.
NOTE: Borehole azimuth, declination of borehole for non-vertical boreholes, and where applicable, borehole designation should also be recorded.
(e) Seam name and thickness.
(f) Sample type, sample identification, masses, core lengths where applicable, and depth to top and base of the sample.
(g) Date when initially sampled.