Trainee should be able to identify if results have exceeded the recommended time weighted- average. (Source: Note 1 of this QTP and Career Development Course 4B051) 2. You have sampled for ethylene glycol. The results are: Sample number Time Results 1 0915 to 0920 8.2 mg/m3 2 0930 to 0935 7.5 mg/m3 3 0945 to 0950 8.0 mg/m3 Select the appropriate formula and calculate a 15-minute TWA (STEL) using the following data: A: 𝐶𝐶1 𝑇𝑇1+ 𝐶𝐶2𝑇𝑇2+ 𝐶𝐶𝑛𝑛𝑇𝑇𝑛𝑛 15𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉 𝑇𝑇𝑇𝑇𝐴𝐴 (𝑆𝑆𝑇𝑇𝐸𝐸𝐿𝐿)= 15 𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉𝐴𝐴 83AFQTP 4B051-7 Journeyman Training Guide: Occupational & Environmental Air/Gas Sampling 3 3 3 (8.2 𝑉𝑉𝑚𝑚/𝑉𝑉 𝑒𝑒 5 𝑉𝑉𝑇𝑇𝑠𝑠𝐴𝐴) + (7.5 𝑉𝑉𝑚𝑚/𝑉𝑉 𝑒𝑒 5 𝑉𝑉𝑇𝑇𝑠𝑠𝐴𝐴)+(8.0 𝑉𝑉𝑚𝑚/𝑉𝑉 𝑒𝑒 5 𝑉𝑉𝑇𝑇𝑠𝑠𝐴𝐴) 15𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉 𝑇𝑇𝑇𝑇𝐴𝐴 (𝑆𝑆𝑇𝑇𝐸𝐸𝐿𝐿)= 15 𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉𝐴𝐴 3 3 3 (41 𝑉𝑉𝑚𝑚/𝑉𝑉 /𝑉𝑉𝑇𝑇𝑠𝑠) + (37.5 𝑉𝑉𝑚𝑚/𝑉𝑉 /𝑉𝑉𝑇𝑇𝑠𝑠)+(40 𝑉𝑉𝑚𝑚/𝑉𝑉 /𝑉𝑉𝑇𝑇𝑠𝑠) 15𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉 𝑇𝑇𝑇𝑇𝐴𝐴 (𝑆𝑆𝑇𝑇𝐸𝐸𝐿𝐿)= 15 𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉𝐴𝐴 3 (118.5 𝑉𝑉𝑚𝑚/𝑉𝑉 /𝑉𝑉𝑇𝑇𝑠𝑠) 15𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉 𝑇𝑇𝑇𝑇𝐴𝐴 (𝑆𝑆𝑇𝑇𝐸𝐸𝐿𝐿) = 15 𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉𝐴𝐴 3 15𝑉𝑉𝑇𝑇𝑠𝑠𝑉𝑉𝑅𝑅𝑉𝑉 𝑇𝑇𝑇𝑇𝐴𝐴 (𝑆𝑆𝑇𝑇𝐸𝐸𝐿𝐿)= 7.9 𝑉𝑉𝑚𝑚/𝑉𝑉 Note: Once trainee has completed calculation; have them compare their results to adopted values presented in the American Conference of Governmental Industrial Hygienist (ACGIH), TLVs® and BEIs® (guidebook), most current edition. Trainee should be able to identify if results have exceeded the recommended time weighted- average. (Source: Note 2 of this training module and Career Development Course 4B051) 84AFQTP 4B051-7 Journeyman Training Guide: Occupational & Environmental Air/Gas Sampling STS Line Item 4.5.2.13: Calculate upper and lower confidence limits TRAINER GUIDANCE Proficiency Code: 3c Can do all parts of the task. Needs only a spot check of completed work. Can identify PC Definition: why and when the task must be done and why each step is needed. Prerequisites: None • ACGIH TLV Booklet, 2008 Training References: • 29 CFR 1910.1000(d) Additional Supporting Fundamentals of Industrial Hygiene, 5th edition References: http://www.cdc.gov/niosh/docs/2003-154/ CDC Reference: 4B051 • Air sampling results • Calculator Training Support Material: • NIOSH Manual of Analytical Methods • ACGIH TLV Booklet Specific Techniques: Conduct hands-on training and evaluation. Given air sampling results and references, calculate upper and lower confidence limits Criterion Objective: successfully completing all checklist items with no trainer assistance. Notes: See Notes Section for formulas. 85AFQTP 4B051-7 Journeyman Training Guide: Occupational & Environmental Air/Gas Sampling TASK STEPS 1. Obtain laboratory results of analyte(s) sample 2. Determine the standard concentration of the analyte(s) and the sampling procedure information1 3. Identify the sampling and analytical error (SAE) factor for the analyte(s) 2 4. Calculate the upper confidence limit (UCL) 3 5. Calculate the lower confidence limit (LCL) 4 6. Recognize when the OEEL could be exceeded5 7. Utilize OEHMIS (DOEHRS or equivalent), as applicable. LOCAL REQUIREMENTS: NOTES: 1. The standardized concentration of an analyte takes into consideration random fluctuations of its presence throughout the sampling process. This variation is expressed by the National Institute for Occupational Safety and Health (NIOSH) as S rT which is an equivalent term indicating the measure of precision. It can be found in the NIOSH Manual of Analytical Methods. The standardized concentration, therefore, can be expressed by the following formula where Y equals standardized concentration and X