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. Author manuscript; available in PMC: 2021 Jun 1.
Published in final edited form as: J Occup Environ Hyg. 2018 Mar;15(3):167–181. doi: 10.1080/15459624.2017.1401710

TABLE III.

Process information, ventilation measurements, and process duration TWAs

Measurement Location or Job Class What was Measured (units) F-18 Painting Bay 6 (Initial Survey) N E-2 Painting Bays 7–8 (Post-mod) N C-2 Painting Bays 7–8 (Post-mod) N F-18 Painting Bay 2 (Post-mod) N
Mid-Hangar Mean Velocity, m/s (fpm) 0.528 (104) 20 0.412 (81.1) 8 0.412 (81.1) 8 0.406 (80.0) 8
Paint Quantity (gal) 13 1 16 1 18 1 13 1
Paint Formula HDI monomer/HDI oligomer (% NCO) 0.143/9.97 1 0.022/4.53 1 0.016/5.16 1 0.043/9.27 1
Sprayer mean/gmean [range] HDI monomer (μg/m3) 33.1/32.2
[25.0, 49.6]
6 11.3/10.5
[6.06, 14.2]
3 7.31/7.25
[6.37, 8.26]
2 30.9 1
HDI oligomer (μg NCO/m3) 279/259
[178, 484]
6 191/169
[78.6, 265]
3 242/242
[240, 245]
2 725 1
TPM (mg/m3) 20/18
[7.0, 26]
6 14 1
Cr[VI] (μg/m3) 530/500
[220, 650]
6 360 1
Hoseman mean/gmean [range] HDI monomer (μg/m3) 6.19/3.99
[<0.7, 11.3]
6 3.88/3.62
[2.49, 5.27]
2 19.6 1
HDI oligomer (μg NCO/m3) 81.7/42.7
[<3, 153]
6 61.5/54.9
[33.8, 89.2]
2 673 1
TPM (mg/m3) 5.2/4.3
[1.4, 10]
6 5.9 1
Cr[VI] (μg/m3) 150/120
[37, 300]
6 170 1

Note: Values below the LOQ (indicated by the < symbol) were divided by √2 for calculation of means.