Therefore, identifying chemicals of concern in CTPVs is important. Links to more information about these chemicals. CTPVs are measured by passing workplace air through a sampling device and then analyzing the sample for the compounds of interest. Polynuclear Aromatic Hydrocarbons by HPLC . Polynuclear Aromatic Hydrocarbons by GC .
Engineering controls are the best methods for controlling exposure to CTPVs.
Engineering controls include ventilation, isolating processes involving the use of CTPVs, and, where possible, automated handling of open coal tar products. Respirators may also be worn by individuals exposed to CTPVs and protective clothing may be used to prevent contact with products containing CTPVs. However, personal protective equipment should be the last line of defense. Many of the references under Recognition and Evaluation contain information about controlling CTPVs exposure. The following table presents exposure limits established for CTPVs and related substances.