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The effects of dissolved lead on the anodic dissolution behavior of Alloy 690 (UNS N06690) were experimentally investigated in an alkaline solution that is used to simulate the environment in a nuclear steam generator crevice.
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On November 4, 1993, OSHA’s Lead in Construction Standard became the law of the land. Initially, (and to some extent today) the small residential contractor community reacted with complete outrage due to marketability fears, many claiming that they would simply stop working on “old houses.” Industrial contractors along with the larger residential and commercial contractors often at first ignored or complied in a lackadaisical manner with these laws, continuing to work “as it’s always been done.”
This paper identifies the unique steps taken to safely remove lead-based paint from a major highway/commuter railroad bridge connecting Philadelphia, Pennsylvania with Camden, New Jersey, followed by the application of a new long lasting protective coating system. The paper addresses project phasing by the owner and coordination with the commuter train to keep costs down and to minimize inconvenience to the public.
In early 2009 the City of Sunnyvale in Northern California put out to bid a repaint of three five‐million gallon water tank exteriors. The tanks existing coatings qualified as leadbased paint with average concentrations of 120,000ppm or 12% lead. The three tanks were successfully abrasive blasted to an SSPC SP‐10 and recoated with a zinc/acrylic system without erection of an SSPC Guide 6 Type 1A enshrouding containment. This paper tells the story of how this was done successfully using standard but not often seen work practices, even though the project was right next door to an elementary school and multi‐family residential developments and so had to perform to the strictest levels of environmental standards.
The current National Ambient Air Quality Standards (40 CFR parts 50, 51, 53 and 58) for lead were published in 1978 to protect the public from the adverse health effects caused by lead. On May 20, 2008 the EPA published proposed changes to the NAAQS for lead; the final rule was published on October 15, 2008. These changes will affect the ambient air monitoring protocols required on industrial painting projects. This paper will focus on the practicalities of obtaining valid data from TSP-lead air monitors.
This presentation will define what a containment / work platform is for the removal of lead paint for steel structures. Additional topics of discussion will include the design process for containment systems, submission requirements/reviews, containment system installation, and quality control procedures and component review and acceptance in the field by Engineers and Inspectors.
Much of the focus of environmental, health and safety issues in the 1990’s centered on lead. No single hazard occupied the regulatory, public and media spotlight more than lead, and its impact was felt across the entire construction community. As lead fades from the spotlight, other potential hazards begin to emerge.
Since geothermal reservoirs are a feasible energy source to replace fossil fuel supply, many technologies have been developed to take advantage of geothermal energy. Nevertheless, due to the chemical composition of hydrothermal fluids and temperatures, service conditions in geothermal facilities are demanding in many cases in terms of corrosion. Therefore, materials selection based on preliminary material qualification is essential to guarantee a secure and reliable operation of the facilities.
The topic of lead is as relevant today as it has ever been.
The Federal EPA requires that commercial/residential painting contractors be certified to prepare surfaces containing lead based paint on residential and public structures. As a result, when respirators equipped with HEPA filtration are required to be worn to reduce worker exposure levels to below the permissible exposure limit for lead, the surface preparation work is often subcontracted to a licensed lead abate contractor who holds these types of certifications.