PAH Exposures Among Pitch And Asphalt Roofing Workers.
Reed LD; Liss GM
Polynuclear Aromatic Hydrocarbons: Mechanisms, Methods and Metabolism, Cooke 1985:1089-1095
Polycyclic aromatic hydrocarbon (PAH) exposure was evaluated among roofing workers (SIC-1761). Old coal tar pitch roofs at site 1 and an asphalt roof at site 2 were removed and new roofs of the same type were applied. During tear off and application operations personal breathing zone and area samples were collected for about 4 hours. Tear off exposures to total particulates, cyclohexane (110827) or benzene (71432) soluble fractions, and PAHs were measured. Application exposures to soluble fractions and PAH were measured. Roofers at both sites completed a questionnaire to elicit symptoms reported over the previous month and symptoms reported on the evaluation day. A limited physical examination was performed. Workers were exposed to 0.1 to 2.3 milligrams per cubic meter (mg/m3) and 0.3 to 1.1mg/m3 benzene or cyclohexane soluble fractions during asphalt and pitch tear off, respectively. Only pitch exposed workers were exposed to significant concentrations of total PAH, approximately 100 micrograms (microg)/m3, and experienced skin and eye irritation. During hot pitch application total airborne PAH exposure was approximately 30microg/m3 and cyclohexane or benzene soluble fraction exposure ranged from 0.2 to 1.2mg/m3. More severe irritation symptoms were reported for workers during hot pitch application than for hot asphalt workers. Factors reported to aggravate symptoms included white race, windy days, and bright days. Skin lesions, including warts, pigmented nevi, squamous keratoses, and multiple epithelial polyps were observed. All 8 roofers with lesions had 3 or more years of employment; 6 of the 19 without lesions worked 2 or more years. The authors conclude that since asphalt fumes are carcinogenic, substances other than PAH may be acting as cocarcinogens.
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.