Table 4.
Process | Sampling site | Manufacturing area (1st) | Handling area (2nd) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Filter weight (before) | Filter weight (after) | Flow rate (L/min) | Sampling time (min) | Mass concentration (mg/m3) | TWA (mg/m3) | Filter weight (before) | Filter weight (after) | Flow rate (L/min) | Sampling time (min) | Mass concentration (mg/m3) | TWA (mg/m3) | ||
Arc system | Personal-1 | 0.04514 | 0.04527 | 1.994 | 398 | 0.16385 | 0.13586 | 0.04489 | 0.04507 | 2.053 | 380 | 0.23073 | 0.18266 |
| |||||||||||||
CNT analysis | Personal-2 | 0.0449 | 0.04506 | 2.037 | 312 | 0.25175 | 0.16364 | 0.04500 | 0.04522 | 2.038 | 297 | 0.36355 | 0.22495 |
Personal-3 | 0.04502 | 0.04514 | 2.078 | 311 | 0.18573 | 0.12034 | 0.04488 | 0.04515 | 2.034 | 261 | 0.50872 | 0.27662 | |
Personal-4 | 0.04492 | 0.04502 | 2.050 | 322 | 0.15153 | 0.10165 | 0.04507 | 0.04522 | 2.113 | 299 | 0.23742 | 0.14789 | |
| |||||||||||||
CNT purify | Personal-5 | 0.04494 | 0.04509 | 2.024 | 171 | 0.43340 | 0.15440 | 0.04492 | 0.04509 | 2.086 | 277 | 0.29428 | 0.16982 |
| |||||||||||||
Arc system | Area-1 | 0.04487 | 0.04503 | 1.946 | 181 | 0.45425 | 0.17129 | 0.04486 | 0.04502 | 2.016 | 381 | 0.20836 | 0.16538 |
Area-2 | 0.04496 | 0.04509 | 4.414 | 169 | 0.17427 | 0.06136 | 0.04498 | 0.04523 | 4.462 | 303 | 0.18491 | 0.11673 | |
| |||||||||||||
CVD-1 | Area-3 | 0.04486 | 0.04499 | 1.919 | 181 | 0.37427 | 0.14113 | 0.04516 | 0.04530 | 1.973 | 307 | 0.23119 | 0.14787 |
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CVD-2 | Area-7 | NM | 0.04484 | 0.04504 | 1.948 | 307 | 0.33451 | 0.21395 | |||||
| |||||||||||||
CNT analysis | Area-4 | 0.04493 | 0.04513 | 1.956 | 320 | 0.31961 | 0.21307 | 0.04500 | 0.04504 | 1.976 | 306 | 0.06615 | 0.04217 |
| |||||||||||||
CNT purify | Area-5 | 0.04498 | 0.04516 | 2.017 | 319 | 0.27982 | 0.18597 | 0.04495 | 0.04516 | 1.961 | 304 | 0.35235 | 0.22316 |
Area-6 | 0.04492 | 0.0451 | 4.409 | 292 | 0.13983 | 0.08506 | 0.04492 | 0.04515 | 4.566 | 299 | 0.16847 | 0.10494 |
NM: not measured.