Document zbRmzek4p9j6JRR9x5xxxR26g

AR226-1999 TABLE 1* Comparison of Tenax Tube (T.T.) and Aqueous-impinger (A.I_.) C-8 in Air Determinations . Samplinq Location No. of Avg. T.T. C-8 Sample Sets Determination Collected* fmpb) Avg, A.I. C-8 Determination ' (mpb) Ratio T.T, Avg A.1 . Avg B-163, Float. Tank, Mo. 2 Clean Room** B-163, No. 2 T. D. Dryer, No. 2 Clean Room** B-163, No. 1 Clean Room** B-163, No.l Coagulator, 2nd Floor B-163, Flake Hopper B-162, Fine Powder Dryer Room B-163, Tray Conveyor Walkway B-163, Oven Control Room , B-163, Trayout B-163, No. 1 Coagulator, 1st Floor B-163, No. 1 Blender 7 10 4 13 6 6 6 6 4 7 12 2.50 2,14 4.31 0.46 0.53 0.27 <0.06 <0.06 <0.06 . 0.15 0.12 0.41 0.54 1.83 0.35 0.43 0,25 0.06 0,03 0.05 0.20 0.19 6.1 4.0 2.4 1.3 1.2 1.1 ~ 1.0 /vl.O -1.0 0.8 0.6 * Each sample set consists of one Tenax tube result and one aqueous-impinger result. Both samples in each set were collected side by side so their results could be directly compared. . ** According to the paired-t test (p 0.05), a statistically significant increase in C-8 levels using the Tenax tube technique is observed only for those samples collected in th FEP Clean Rooms. The two techniques yielded equivalent C-8 results for all other sampling locations. JGL:sdc 1988B AJP002409 EID079286