Table 4: TSP mass concentrations (8 hr TWA) in personal and area samples from workplace B (2nd day).

Process Sampling siteManufacturing 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 systemPersonal-10.045140.045271.9943980.163850.135860.044890.045072.0533800.230730.18266

CNT analysisPersonal-20.04490.045062.0373120.251750.163640.045000.045222.0382970.363550.22495
Personal-30.045020.045142.0783110.185730.120340.044880.045152.0342610.508720.27662
Personal-40.044920.045022.0503220.151530.101650.045070.045222.1132990.237420.14789

CNT purifyPersonal-50.044940.045092.0241710.433400.154400.044920.045092.0862770.294280.16982

Arc systemArea-10.044870.045031.9461810.454250.171290.044860.045022.0163810.208360.16538
Area-20.044960.045094.4141690.174270.061360.044980.045234.4623030.184910.11673

CVD-1Area-30.044860.044991.9191810.374270.141130.045160.045301.9733070.231190.14787

CVD-2Area-7NM0.044840.045041.9483070.334510.21395

CNT analysisArea-40.044930.045131.9563200.319610.213070.045000.045041.9763060.066150.04217

CNT purifyArea-50.044980.045162.0173190.279820.185970.044950.045161.9613040.352350.22316
Area-60.044920.04514.4092920.139830.085060.044920.045154.5662990.168470.10494

NM: not measured.