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Bridge workers on gangway to Sea Lift Ten
Quartz, Silica, and Heavy Metals: The laboratory methods used were gravimetric determination of inhalable dust (method AS 3640); and metals analysis in high volume filters by ICPOES (method AS 3580); and the gravimetric determination of respirable dust and silica (AS2985/AN505).
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Sea Lift Six was primary used to support the scaffolders and was usually placed at different locations along the western side of the bridge.
Sea Lift Six and support boat - Mission River Bridge
Australian Barge Hire and scaffolders at work
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Sea Lift Ten was used for the placement of machinery including air compressors, generator, hydraulic power-pack, extraction and filtration units, and other equipment.  
Sea Lift Ten beside Mission River Bridge
Our activities included: o Identify the environmental and occupational impacts and aspects;o Evaluate the impacts and aspects of specific activities; o Identify and implement appropriate controls to eliminate or reduce the risks; o Carry out environmental and occupational hygiene monitoring; ando Make recommendations to improve the effectiveness of controls.  
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ISO/IEC and NATA Accreditation: The laboratory that performed the analysis of metals was SGS in Cairns.   This laboratory is accredited for compliance with ISO/IEC 17025 and is also a NATA accredited laboratory 2562 (3146).
Workers returing to compound
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Looking south along the western side of the Mission River Bridge
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Occupational health controls included reassurance air monitoring for lead; reassurance air monitoring for asbestos; personal air monitoring for silica and other dusts; and biological testing for lead in blood of workers before and after working on the bridge.   Environmental controls included sampling riverbank soils before and after work on the bridge for asbestos and heavy metals; sampling water from decontamination and washing for asbestos and heavy metals; and sampling spent garnet for asbestos and heavy metals as per landfill requirements. 
Goodline, Kaefer Integrated Services, and the Multi Off-loading Facility (MOF)
The workplace is the underside of the Mission River Bridge including the road and rail side structure where enclosures were built upon suspended scaffolding.  To the west of the bridge was mobile Sea Lift Six used to support scaffolders.  Sea Lift Ten (jack-up barge) used to locate air compressors, generator, extraction and filtration units and other plant close to enclosures.  
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Unloading hazibags at the M.O.F.
Environmental and occupational monitoring activities included static air samplers for inhalable and respirable heavy metals and asbestos in air adjacent to the entry to the decontamination chamber; filtration outlets; and other locations. Personal air sampling for respirable crystalline silica of personnel working on the bridge (similar exposure group I.e. the SEG).   Environmental monitoring (sampling) of wash water; filtered water; spent garnet;  and riverside soils for heavy metals and asbestos.    All samples analysed by NATA accredited laboratories.  Negative air measurements of an enclosure and real-time dust monitoring every two hours to check enclosure integrity and to ensure fugitive dust eliminated by the engineering and procedural controls. 
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Environics (Qld) Pty Ltd ABN 76 354 368 913
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Weipa, Queensland
Mission River, Weipa
2019 - 2021:  Kaefer Integrated Services Ltd was contracted by Rio Tinto Ltd to provide coating removal and replacement for the substructure of the Mission River and Andoon Creek bridges, Weipa. MBB featured in this photographs is a one-kilometre single lane road-rail bridge that provides an essential transport link between Weipa and the Andoom mine as well as communities north along the coast.  EndFragment
EnvironicsEnvironmental and Occupational Hygiene Journal
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Plant and equipment on Sea Lift Ten
Soil and Spent Garnet:The laboratory methods used were the TCLP (Toxicity Characteristic Leaching Procedure) for Metals Method AN006; and metals in TCLP Extract by ICPOES-USN Method: AN320/AN322.
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Worker’s Compound 
The MRB is a concrete and steel structure spanning the Mission River, a tidal estuary flowing into Albatross Bay. The bridge owner – Rio Tinto requires the previous coating works to be removed and replaced with minimal interruption to bridge operations. The surface coating of the bridge has the likely potential to contain lead (compound) and the unlikely but possible potential to contain asbestos. Environics was engaged by Kaefer Integrated Services Ltd to manage the environmental and occupational hygiene impacts and aspects of the project.