Assertion: ozone's concentration | /r/HasProperty | maintained
Facets:
value: below that level
type: OTHER
Source sentences:
text: In addition, since little change in concentration of generated ozone gas is shown even if a continuous operation is performed for equal to or longer than 1000 hours under rigorous conditions, the initial concentration of generated ozone gas can be maintained.
text: So long as concentrations are kept at or below that level, injury is not expected even in the most sensitive workers so long as their exposure durations coincide reasonably well with or are less than the 8 hr/day, 40 hr/wk regimen.
text: On the other hand, in the example, little change from the initial concentration of generated ozone gas was shown even after the elapse of well over 1000 hours, and a predetermined high concentration of more than 300 g/m3 was maintained.