8 hour air sampling report name location sample time

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8-Hour Air Sampling Report Name Location Sample/ Time 1 Sample/ Time 2 Sample/ Time 3 TWA Valid Exposure Actual PEL Ann Welding Booth 1 4.3 mg/m³ 150 min 3.7 mg/m³ 150 min 2.2 mg/m³ 240 min 3.2 mg/m³ No 9 hrs under 8.89 mg/m³ Frank Worldly Booth 2 2.1 mg/m³ 180 min 2.8 mg/m³ 120 min 3.1 mg/m³ 240 min 2.7 mg/m³ No 9 hrs under 8.89 mg/m³
UNIT II PROJECT 3 Jim Young Booth 3 1.7 mg/m³ 205 min 1.25 mg/m³ 125 min 1.03 mg/m³ 150 min 1.37 mg/m³ Yes 8 hrs under 10 mg/m³ Betty Johnson Booth 4 12.8 mg/m³ 165 min 11.2 mg/m³ 72 min 9.8 mg/m³ 123 min 11.45 mg/m³ No 6 hrs under 13.33 mg/m³ Jack Jones Booth 5 7.8 mg/m³ 190 min 14.2 mg/m³ 149 min 8.8 mg/m³ 140 min 10.08 mg/m³ Yes 8 hrs over 10 mg/m³ Joey Apperton Booth 6 3.9 mg/m³ 155 min 4.6 mg/m³ 90 min 2.1 mg/m³ 46 min 3.83 mg/m³ No 5 hrs under 16 mg/m³ OSHA’s PEL for iron oxide fume is 10 mg/m³ TWA = (C1 T1) + (C2 T2) + (C3 T3) / total mins worked; Revising PELs = PEL x 8 hrs / actual exposure hrs Anne Welding: TWA = (4.3 mg/m³)(150 mins) + (3.7 mg/m³)(150 mins) + (2.2 mg/m³)(240 mins) / 540 mins, TWA = 645 + 555 + 528 / 540, 1,728 mg/min / 540 mins = TWA = 3.2 mg/m³ . 10 mg/m³ x 8 hrs / 9 hrs = 8.89 mg/m³ Actual PEL Frank Worldly: TWA = (2.1 mg/m³)(180 mins) + (2.8 mg/m³)(120 mins) + (3.1 mg/m³)(240 mins) / 540 mins, TWA = 378 + 336 + 744 / 540, 1,458 mg/min /540 mins = TWA = 2.7 mg/m³ . 10 mg/m³ x 8 hrs / 9 hrs = 8.89 mg/m³ Actual PEL Jim Young: TWA = (1.7 mg/m³)(205 mins) + (1.25 mg/m³)(125 mins) + (1.03 mg/m³)(150 mins) / 480 mins, TWA = 348.5 + 156.25 + 154.5 / 480, 659.25 mg/min / 480 mins = TWA = 1.37 mg/m³ . 10 mg/m³ x 8 hrs / 8 hrs = 10 mg/m³ Actual PEL Betty Johnson: TWA = (12.8 mg/m³)(165 mins) + (11.2 mg/m³)(72 mins) + (9.8 mg/m³)(123 mins) / 360 mins, TWA = 2,112 + 806.4 + 1,205.4 / 360, 4,123.8 mg/min / 360 mins = TWA = 11.45 mg/m³ . 10 mg/m³ x 8 hrs / 6 hrs = 13.33 mg/m³ Actual PEL Jack Jones: TWA = (7.8 mg/m³)(190 mins) + (14.2 mg/m³)(149 mins) + (8.8 mg/m³)(140 mins) / 479 mins, TWA = 1,482 + 2,115.8 + 1,232 / 479, 4,829.8 / 479 = TWA = 10.08 mg/m³ .

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