The waste phase is to be included in the calculation of exposure.
Consequentially the registrant has to include the waste phase and especially low standard recycling processes into his or her calculation of exposure.
Consequently, the new minimal and maximal reference levels can be selected; these are suitable for a particular in situ location and should be used for the calculation of exposure boundaries on that location.
While this comprehensive definition is a strength, it precluded the use of specific activity-time denominators for the calculation of exposure-based rates due to the lack of exposure data sources at the population level in NC (or any other US jurisdiction).
This approach enabled the calculation of exposure metrics restricted to subjects rated as having probable TCE exposure.
Models with 5-, 10-, and 15-year exposure lags were assessed, meaning that exposure in the year of death and in the previous 4, 9, and 14 years, respectively, was not included in the calculation of exposure duration.
Based on both experimental and human studies, an approximate BMDL of 1 μg/L would seem to be an appropriate order of magnitude for calculation of exposure limits for the PFCs.
25 Therefore, in the calculation of exposure duration, the authors assumed that the workers remained in the same job as recorded in the census in 1970 between the ages of 20 and 65 years.
Due to lack of other routine sources of traffic related data in Cypriot cities as well as the retrospective nature of this study to allow collection of self-reported information from the participants, these data allowed the calculation of exposure assessment measures in addition to proximity.
Calculations of exposure combining the estimated concentrations with times worked from work histories [ 4, 5] were programmed using the tabulation and calculation facilities of the statistical package GenStat [ 7], without and with a ten-year lag to allow for latency.
