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dc.contributor.authorRidderseth, Hilde
dc.contributor.authorDaltveit, Dagrun Slettebø
dc.contributor.authorHollund, Bjørg Eli
dc.contributor.authorKirkeleit, Jorunn
dc.contributor.authorKromhout, Hans
dc.contributor.authorKrüger, Kirsti
dc.contributor.authorAasbø, Kari
dc.contributor.authorBråtveit, Magne
dc.date.accessioned2024-08-12T12:15:53Z
dc.date.available2024-08-12T12:15:53Z
dc.date.created2023-06-02T14:56:32Z
dc.date.issued2023
dc.identifier.issn2398-7308
dc.identifier.urihttps://hdl.handle.net/11250/3145829
dc.description.abstractObjectives Work on offshore petroleum installations may cause exposure to benzene. Benzene is a carcinogenic agent, and exposure among workers should be as low as reasonably practicable. We aimed to assess short-term (less than 60 min) benzene exposure from the most frequent work tasks on offshore installations on the Norwegian continental shelf and identify determinants of exposure. In addition, we aimed to assess the time trend in task-based benzene measurements from 2002 to 2018. Methods The study included 763 task-based measurements with a sampling duration of less than 60 min, collected on 28 offshore installations from 2002 to 2018. The measurements were categorized into 10 different tasks. Multilevel mixed-effect Tobit regression models were developed for two tasks: sampling and disassembling/assembling equipment. Benzene source, season, indoors or outdoors, design of process area, year of production start, sampling method, and work operation were considered as potential determinants for benzene exposure in the models. Results The overall geometric mean (GM) benzene exposure was 0.02 ppm (95% confidence intervals 95%(CI: 0.01–0.04). The pipeline inspection gauge (PIG) operation task was associated with the highest exposure, with a GM of 0.33 ppm, followed by work on flotation cells, disassembling/assembling, and sampling, with GMs of 0.16, 0.04, and 0.01 ppm, respectively. Significant determinants for the disassembling/assembling task were work operation (changing or recertifying valves, changing or cleaning filters, and breaking pipes) and benzene source. For sampling, the benzene source was a significant determinant. Overall, the task-based benzene exposure declined annually by 10.2% (CI 95%: −17.4 to −2.4%) from 2002 to 2018. Conclusions The PIG operation task was associated with the highest exposure out of the ten tasks, followed by work on flotation cells and when performing disassembling/assembling of equipment. The exposure was associated with the type of benzene source that was worked on. Despite the decline in task-based exposure in 2002–2018, technical measures should still be considered in order to reduce the exposure.en_US
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleBenzene Exposure From Selected Work Tasks on Offshore Petroleum Installations on the Norwegian Continental Shelf, 2002-2018en_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.doi10.1093/annweh/wxac067
dc.identifier.cristin2151343
dc.source.journalAnnals of Work Exposures and Healthen_US
dc.source.pagenumber228-240en_US
dc.identifier.citationAnnals of Work Exposures and Health. 2023, 67 (2), 228-240.en_US
dc.source.volume67en_US
dc.source.issue2en_US


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