Table 1

Job exposure matrix for the study plant

Type of potroom and job Period PAH (μg/m3) Measurements (n)
Open prebaked:
 All workers1919–41——
HS Søderberg:
 Potroom worker1939–60 150 —
1961–78 100 31-150
 Supervisor1939–60 120 —
1961–78 80 31-150
 Stud puller1939–60 300 —
1961–78 200 31-150
 Day maintenance1939–60 300 —
1961–78 200 3 1-150
VS Søderberg:
 Potroom worker1958–69 200 —
1970–79150141-151
1980–8575601-151
1986–95 25 170
 Stud puller1958–69 1500 —
1970–791200141-151
1980–84900601-151
1985–95 100 50
 Day maintenance1958–69 300 —
1970–79200141-151
1980–85120601-151
1986–95 40 108
Hooded prebaked:
 All workers1981–95 <2 31
Anode production1918–19 50 —
1920–38 125 —
1939–78 100 1 1-152
Anode mounting1981–95 5 38
Potlining1981–95 75 178

  • ↵1-150 The same three stationary measurements in the potrooms.

  • ↵1-151 The same 14 and 60 stationary measurements in the potroom.

  • ↵1-152 One stationary measurement.

  • Bold=estimates based directly on personal measurements; normal=estimates based on relative changes in stationary measurements; italics=estimates based on assignment from a panel of three people familiar with the industry.