NVLAP TEM PROFICIENCY Individual Laboratory Report LAB ERROR POINT SUMMARY

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1 NVLAP TEM PROFICIENCY Individual Laboratory Report LAB ERROR POINT SUMMARY Error Points Part A: Calculation of Mean and Standard Deviation: 0.00 Part B: Assignment of Ranks and Evaluation for Outliers of Individual Analyses: 0.00 Part C: Other Error Points: 0.00 TOTAL ERROR POINTS: 0.00 (Failure = 2.0 or more total error points) 1

2 Part A. Calculation of mean (structures/mm2) Mean of Filter Concentrations Filter ID and asbestos type Mean to two decimal places Mean to two significant figures Error Points Lab RTI Lab RTI Error Points #1 Chry #1 Amo #1 Croc #1 Trem-Act #1 Anth #1 Total Asbestos #2 Chry #2 Amo #2 Croc #2 Trem-Act #2 Anth #2 Total Asbestos (blank) #3 Chry #3 Amo #3 Croc #3 Trem-Act #3 Anth #3 Total Asbestos (blank) #4 Chry #4 Amo #4 Croc #4 Trem-Act #4 Anth #4 Total Asbestos

3 Part A. Calculation of standard deviation (structures/mm2) Standard Deviation of Concentrations for Total Asbestos Filter ID Standard deviation to two decimal places Error Points Standard deviation to two significant figures Lab RTI Lab RTI Error Points # #2 (blank) #3 (blank) # Comments for reported mean values to two decimal places: Comments for reported mean values to two significant figures: Comments for reported standard deviation values to two decimal places: Comments for reported standard deviation values to two significant figures: 3

4 Part B. Assignment of ranks and evaluation for outliers of individual analyses Round # Filter ID # Quarters Lab Mean Filter Mean Lab Ranking Error Points 09-1 TEM PT was an Unknown Material Identification Test Round # #2 (blank) (2) #3 (blank) (1) # TEM PT was an Unknown Material Identification Test Round #1 (blank) (1) #2 (blank) (2) # # TEM PT was an Unknown Material Identification Test Round #1 (blank) (2.5) # # #4 (blank) (2) TEM PT was an Unknown Material Identification Test Round #1 (blank) (2.5) # # # TEM PT was an Unknown Material Identification Test Round #1 (blank) (2.5) #2 (blank) (2.5) # # TEM PT was an Unknown Material Identification Test Round # #2 (blank) (1.5) 14-2 #3 (blank) (1) 14-2 #

5 Part B. Assignment of ranks and evaluation for outliers of individual analyses Error Description Error Points The laboratory is flagged as a high outlier over the past six rounds in a plot of Relative Laboratory Performance (RLP) vs. Rescaled Sum of Z-scores (RSZ) (no error points assigned this round). Comments: Part C. Other error points Error Description Error Points For Filter 3, the laboratory reported one chrysotile structure on a blank filter. RTI relocated and verified the structure. The laboratory reported less than two asbestos structures on a blank filter (no error points assigned). Total Error Points Proficiency Test : 0.00 General comments: If error points were assigned in Part A, please refer to this report when completing the EF-1 Form for TEM PT Your laboratory will be asked to determine the cause of TEM PT Part A error(s) and to state the quality assurance procedures to be used in future proficiency test rounds. 5

6 Appendix A. Dot plots of laboratory z-scores relative to robust filter set means Starting with the PT round of testing, dot plots of the laboratory performance relative to robust filter set means for the past six counting rounds of proficiency testing will be included in the Individual Laboratory Reports. Dot plots are similar to Shewhart control charts, but with multiple points for each time period. 1 The dot plot on the next page is a plot of the z-score (relative to the robust filter set mean) vs. the round for your laboratory. The z-scores plotted are based on robust methods relative to the robust filter set mean (location) and standard deviation (scale). The small circles represent the average z-score for time period; solid lines connect the averages. There are reference lines for z-score = 0 (solid line) and z-scores = ± 2, ± 3 (dashed lines). It is expected that most z-score values will fall between the dashed lines corresponding to z-scores of ± 2 and that the values will occur both above and below the line corresponding to a z-score = 0. A key for the materials corresponding to the numbers on the dot plot is given in Table 1 below. The plot is used for evaluation of the sign test of z-scores relative to the robust filter set mean (a different sign test is used to evaluate laboratory average relative to the filter mean). If all values or if all but one value are above or below the zero line, a counting bias is indicated. Table 1. Key for numbers on dot plot Round Number Material Amosite Amosite Chrysotile Chrysotile Amosite Chrysotile Chrysotile Amosite Amosite Chrysotile Chrysotile-Crocidolite Amosite Chrysotile-Crocidolite 1 ISO 13528:2005(E), International Organization for Standardization, Geneva, Switzerland.

7 Dot Plot for Laboratory z-score Round NVLAP TEM Proficiency Test

Scanning Electron Microscopy Scheme

Group Report Round 7A November 2017 Scanning Electron Microscopy Scheme BACKGROUND This report covers Round 7 of the SEMS asbestos fibre counting PT scheme. The scheme is operated by HSL, in collaboration