Download or read book Field Methods for Determining Lead Content in Bridge Paint Removal Waste written by Zhan Shu and published by . This book was released on 2013 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Methods for Determining Lead Content in Bridge Paint Removal Waste written by Zhan Shu and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The removal of paint from bridges and other structures is a significant issue facing transportation agencies because of the presence and potential for release of lead and other contaminants upon disposal. A large percentage of the bridges are reaching a critical level of deterioration, resulting in management issues for paint waste. The New York State Department of Transportation (NYSDOT) applies a conservative approach by assuming all waste generated from bridges previously painted with lead-based paint (LBP) is hazardous. Therefore, an approach that provides accurate in-situ characterization of the waste classification would be beneficial. The goal of this project is to develop a rapid and cost-effective method that can provide an accurate characterization of waste classification. With 11 Regions and 2,385 bridges rehabilitated and subsequently repainted after NYSDOT stopped using LBP on bridges (after 1988), 24 bridges from across the NYS were selected for this study based on Sampling Theory (Deliverable Task 1). The literature review demonstrated that elevated metal concentrations in paint waste have resulted in leaching that exceeds toxicity characteristic (TC) concentrations; however, models to predict leaching behavior have not been developed (Deliverable Task 2). Field portable X-ray fluorescence (FP-XRF) (Deliverable Task 3) was applied to quantify Resource Conservation and Recovery Act (RCRA) metals (i.e., As, Ba, Cr, Cd, Pb, Hg, Se, and Ag) along with iron and zinc in paint waste samples (Deliverable Task 4), while Hach DR 2800 field portable spectrophotometer (Deliverable Task 3) was employed for measuring dissolved and total lead concentrations in bridge wash water (Deliverable Task 5). Leaching behavior of the paint waste was evaluated with the U.S. Environmental Protection Agency (U.S. EPA) toxicity characteristic leaching procedure (TCLP) and multiple extraction procedure (MEP) (Deliverable Task 6). Elevated Pb (5 to 168,090 mg kg-1 ), Cr (21 to 10,192 mg kg-1 ), and other metal concentrations were observed in the paint samples. However, 48 out of 51 samples passed the TCLP test, while 19 out of 24 samples revealed concentrations less than the TC level in the MEP study. These results are attributed to the use of iron-based abrasives (steel grit) in the paint removal process. Trace metals are sequestered through interactions with the steel grit surface resulting in reduced leachable concentrations (less than the TC limit). Using the suite of analyses including sequential extraction procedure (SEP), X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM), iron oxides were observed on the steel grit surface and are important surfaces affecting the degree of metal leaching from the paint waste (Deliverable Task 6). Given an understanding of mechanistic processes along with a demonstrated analysis of variables through principle component analysis (PCA), statistically-based models for leaching from paint waste were developed (Deliverable Task 7). The statistical models demonstrated 96 percent of the data fall within the 95% confidence level for Pb and Zn, although the regression model was not significant for Cr leaching (R2 0.5 -0.7, p 0.75). The models have applicability over a wide range of total metal concentrations. A practical advantage in applying models developed is the ability to estimate contaminant leaching from paint waste without additional laboratory studies including the U.S. EPA TCLP. Therefore, the statistically-based models developed are a powerful approach for predicting metal leaching and therefore waste classification.
Download or read book Field Test of a New Procedure for Removing Lead based Paint from Bridges written by William H. Bushman and published by . This book was released on 2000 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the National Bridge Inventory, of the more than 200,000 steel bridges listed, between 80 and 90 percent were painted with lead-based paint. Of the approximately 7,000 bridges in Virginia with steel superstructures, well over half were painted with systems that contain lead-based formulations. Removing the failed and failing lead-containing paint from highway bridges without jeopardizing environmental quality and worker health has become an increasingly vexing problem. The expense and liability involved in disposing of the debris add to the problem. The cost of maintaining such structures is an increasing burden because of the requirements for dealing with lead in the environment and workplace, especially when traditional methods are used. In the Virginia Department of Transportation alone, there has been an 86 percent reduction in the number of structures painted between 1990 and 1996 because of the cost and uncertainty in dealing with lead. This report documents a field trial of a unique procedure named ElectroStrip® (ElectroStrip) that uses an electrochemical treatment to cause paint to debond from structural steel. Proven in the laboratory, this is the first use of this technology at a production level. As part of a bridge painting contract, ElectroStrip was used to remove 74 m2 of lead-based paint from the beam of a bridge in service on the Virginia interstate system. Over the course of 7 workdays, the ElectroStrip method removed the original paint system and generated 63 percent less solid debris than full abrasives blasting would have done. The results of this trial showed that ElectroStrip, though not a panacea, is a viable tool for paint management systems, particularly for environmentally sensitive situations. Although the production rate using ElectroStrip is slower than those of more conventional techniques, ElectroStrip provides greater environmental and worker protection than any other paint removal method demonstrated and documented thus far.
Download or read book Lead containing Paint Removal Containment and Disposal written by Lloyd M. Smith and published by . This book was released on 1995 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately 90% of the steel highway bridges in the United States are protected from corrosion with lead-based paints. A comprehensive study was performed to evaluate the various factors involved with lead-paint removal. Containment and ventilation systems were studied and recommendations were developed for containment materials, design of joints, design of air inputs, negative pressure, and air flow within containment. Waste disposal is a significant issue due to long-term liability and cost. Tests were performed on hazardous waste characterization, waste minimization, methods of generating non-hazardous waste, and long-term stability of lead-containing wastes and stabilized wastes. Alternate surface preparation methods and costs were evaluated. Recyclable steel abrasive was found to be cost-competitive and to reduce the amount of debris by approximately 90% compared to expendable abrasive.
Download or read book Lead Based Paint Handbook written by Jan W. Gooch and published by Springer Science & Business Media. This book was released on 2005-12-08 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lead-based paint has become a national issue and will continue to be a hi- priority focus ofnational, state, and local agencies until there is no lead-based paint in the United States. Lead-based paint has become a tremendous health hazard for people and animals. Lead-based paint has been in widespread use throughout Europe and the United States. Lead has been known to be a health hazard since the time ofPliny the Elder (A. D. 23–79), but it was deemed that the advantages of lead in paint outweighed the health hazards. There has been a change in outlook, and in 1973 the U. S. Congress banned all lead paint from residential structures. A voluminous number of law suits have been initiated since, and continue to be litigated with the purpose of determining the parties responsible for the lead poisoning of children and others and to exact the indemnities. Lead-based paint is still authorized for use on bridges and nonresidential structures, and thousands of city, state, military, and federal government housing projects still contain lead-based paint. This paint must be removed if these dwellings are to be safe living quarters, especially for children. Aba- ment techniques continue to be evaluated; some have been used successfully. Lead-based paint abatement will continue into the next century, and it is hoped that this comprehensive volume will serve as a guide for those seriously interested in this important subject.
Download or read book Bridge Paint written by Bernard R. Appleman and published by Transportation Research Board. This book was released on 1992 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to bridge painting contractors, bridge maintenance and construction engineers, environmental engineers, equipment manufacturers and suppliers, and others interested in bridge paint removal. Information is provided on current practices in bridge paint removal, containment, and disposal, with special attention paid to environmental, health, and cost issues, along with a discussion of current environmental regulations governing paint removal practices. The removal of bridge paint is a nationwide problem with sensitive environmental concerns and rapid changes in available technology and regulatory oversight. This report of the Transportation Research Board describes the current state of the practice for bridge paint removal, containment, and disposal, especially with regard to lead-based or other toxic paints. Additionally, current environmental regulations and health concerns in this area are examined.
Download or read book Lead based Paint written by and published by . This book was released on 1990 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidelines for the Evaluation and Control of Lead Based Paint Hazards in Housing written by David E. Jacobs and published by DIANE Publishing. This book was released on 1996-07 with total page 773 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Appropriate Methods for Reducing Lead paint Hazards in Historic Housing written by Sharon C. Park and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lead based Paint Hazards written by ATC Environmental Inc and published by Van Nostrand Reinhold Company. This book was released on 1994 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This detailed, user-friendly approach to assessing and controlling lead hazards in housing, schools, day-care centers, and commercial and industrial settings combines the author's expertise on the subject with a practical approach to real-world procedures, emphasizing key provisions of federal, state, and local regulations. 20 illustrations.
Download or read book Expanding Metropolitan Highways written by Bernard R. Appleman and published by Transportation Research Board. This book was released on 1997 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This synthesis will be of interest to state DOT bridge maintenance and construction engineers; regulators, consultants, and contractors involved with the removal of lead paint from bridges and structures; and structural coatings specialists, chemists, and researchers. This synthesis describes the current state of the practice for the removal of lead-based paint from existing highway steel bridges."--Avant-propos.
Download or read book Corrosion Control Through Organic Coatings written by Amy Forsgren and published by CRC Press. This book was released on 2006-04-25 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Choosing the most suitable coatings for structures such as bridges and building supports can extend the service life of that structure significantly. Corrosion Control Through Organic Coatings discusses the most important variables in the testing, selection, and application of heavy-duty, organic corrosion-protection paints. The book addresses the maintenance and restoration of older infrastructure and industrial plant as well as coatings for new structures made from various types of steel. The author, Amy Forsgren, examines the mechanisms of aging and deterioration caused by ultraviolet light, condensation, temperature, and chemical reactions. She also provides a complete description of composition of anti-corrosive organic coatings, including pigments, binders, and additives. Ms. Forsgren suggests which corrosion tests provide the most useful information on coating performance and corrosion-protection. Several chapters review the advantages and disadvantages of of different surface preparation methods. In addition, the author considers the environmental impact of various coatings and recognizes health hazards posed by volatile organic compounds (VOC's), toxic or hazardous pigments such as lead, and silica dust exposure. She also offers recommendations for providing safe working environments for personnel handling surface preparation. Integrating engineering aspects and corrosion expertise with paint formulation knowledge and surface chemistry, Corrosion Control Through Organic Coatings provides unique coverage of the most advanced treatments for extending the life span of heavy-duty metal structures today.
Download or read book Residential Lead Abatement written by Laurence Tasaday and published by McGraw-Hill Companies. This book was released on 1995 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lead poisoning poses a serious health hazard to anyone who comes into contact with it on the job - the Occupational Safety and Health Administration (OSHA) estimates that more than 700,000 workers are exposed to lead each year while working on remodeling projects. A valuable resource for construction and painting contractors as well as homeowners, this handbook provides you with a complete set of guidelines for safely and efficiently eliminating all types of lead found in the home, especially lead paint. Residential Lead Abatement also includes a handy, state-by-state list of lead poisoning prevention programs, hazardous waste agencies, and lead paint statutes, as well as relevant federal agencies and information hotlines.
Download or read book Field Analytical Methods for Hazardous Wastes and Toxic Chemicals written by and published by . This book was released on 1997 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Workers Exposure and Emission Factor Determination for Lead and Other Metals During Bridge Paint Removal written by Emmanuel Iyiegbuniwe and published by . This book was released on 1994 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remediation and Stabilization of Soils Contaminated by Lead Resulting from the Removal of Paint from Bridges written by M. K. Banks and published by . This book was released on 2005-07-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Lead-based paints are commonly used for painting steel bridge structures. Soils in the immediate vicinity of older bridges have been contaminated with Pb as a result of normal weathering and peeling of the paint coupled with removal prior to repainting. The objectives of this project were to assess the extent of lead contamination near highway bridges and to evaluate phytoremediation and immobilization as means of remediation. We examined soils in the vicinity of approximately 20 bridges in Indiana that had been repainted recently and were known to have been painted originally with Pb-based paint. We found only three bridges in which the extensive areas of soil were contaminated by Pb in concentrations greater than 400 mg/kg. Two of these sites were used for this project. In the field study, soluble phosphate was added to the soil and transformations of Pb were monitored using chemical extractants. Simultaneously, sunflowers were grown in the field to test the feasibility of phytoextraction for these conditions. Phosphate additions were effective in significantly reducing bioaccessible Pb, but the sunflowers were unable to remove Pb from the soils. A laboratory study using columns of contaminated demonstrated the very low mobility of Pb in soils. The recommendation from this study is that the immediate vicinity of recently painted bridges be tested for Pb in the soils. Elevated concentrations can be treated with soluble phosphate to reduce bioavailability of Pb.
