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Airborne acid data from field tests
Spray
test no. |
HF, ppm |
H3PO4, mg/m3 |
| High | Low | Mean |
High | Low | Mean |
| 10 | 0.99 | 0.00 | 0.21 | 0.09 | 0.00 | 0.02 |
| 11 | 2.48 | 0.00 | 0.60 | 0.05 | 0.00 | 0.01 |
| 12 | 1.67 | 0.02 | 0.71 | 0.08 | 0.00 | 0.01 |
| 22 | 0.17 | 0.00 | 0.06 | 0.05 | 0.00 | 0.02 |
| 26 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Monitoring was performed per NIOSH method 7903 (personal monitoring); values are 8-h TWAs. The OSHA PEL for HF is 3 ppm and for H3PO4 is 1 mg/mm3.
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