| Autor: |
Kurtz, Lawrence A., Verma, Dave K., Sahai, Dru |
| Předmět: |
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| Zdroj: |
Applied Occupational & Environmental Hygiene; Jul2003, Vol. 18 Issue 7, p545, 8p |
| Abstrakt: |
This case study describes occupational exposures to coal tar pitch volatiles (CTPV) as benzene soluble fraction (BSF), polycyclic aromatic hydrocarbons (PAHs) and total particulates at a unique operation involving the use of coal tar in the making of expansion joints in construction of a multi-level airport parking garage. A task-based exposure assessment approach was used. A set of 32 samples was collected and analyzed for total particulate and CTPV-BSF. Twenty samples of this set were analyzed for PAHs. Current American Conference of Governmental Industrial Hygienists (ACGIH®) respective threshold limit value-time weighted average (TLV-TWA) for insoluble particulates not otherwise spec-ified (PNOS) is 10 mg/m[SUP3] as inhalable dust, which roughly corresponds to 4 mg/m[SUP3] total particulate; for CTPV as BSF the TLV is 0.2 mg/m[SUP3], and for specific PAHs such as benzo(a)-pyrene (B[a]P), ACGIH suggests keeping exposure as low as practicable. The recommended Swedish exposure limit for B(a)P is 2 μg/m[SUP3]. The highest exposure levels measured were 12.8 mg/m[SUP3] for total particulate, 1.9 mg/m[SUP3] for coal tar pitch volatiles as BSF, and 12.8 3g/m[SUP3] for B(a)P. Several of the CTPV-BSF results were over the TLV of 0.2 mg/m[SUP3]. The data set is limited; therefore, caution should be used in its interpretation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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