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FILE NAME: Z< DATE: DOC#: Z< DOCUMENT DESCRIPTION :ZZZdZZZ WZZ Letter to the Editor Regulatory ToxIcology and Pharmacology xxx (2012) xxx-xxx Contents lists available at SciVerse ScienceDirect Regulatory Toxicology and Pharmacology journal homepage: www.elsevier.com/locate/yrtph Letter concerning the paper by Finley and colleagues: dx.doi.org/ 10.1016/j.yrtph.2012.05.015 Dear Dr.

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FILE NAME Brakes BRK DATE 0000 DOC BRK229 DOCUMENT DESCRIPTION Notes for SAE 2 Need to consider and other fibers from particulate that brake dust particulate from asbestos used in friction materials usually differs found in manufacturing of friction products most brake dust particulate that can become airborne would not be picked up from aralysis under an OSHA inspection lg fraction fraction Much of behaves this particulate is under aerodynamically much like 3000 A in length and a gas This particulate may not be biologically inert mong garage mechanics routine exposures of large amounts of fine brake dust may take its toll Whatever the merits or circumstar of recent litigation over occupational cancers related to brake dust we feel it is prudent to promote sound work procedures and control measures during the performance of drum brake work As envisioned EPA's brake mecharic education program will develop a videotape a fact sheet and a poster to reach shop operators mechanics and tech students We invite interested organizations to assist in the dissemination of these materials when they are pleted Invest III Other durable respirable fiters trend brake to substitute for asbestos in brakes various substitute lining materials are in use or under development Problem finding materials whose to asbestos but which are either biologically performance is comparable inert or not as active Initial laboratory testing for these substitute materials may there may be cause for concern health effects be promising of some of for others substitution for substitution's sake alone is not the answer relatively little is known about health effects of some of these substitute materials and virtually nothing is known as to how dust from brakes lined with these materials is composed chemically and physically respirable materials during ranufacture may become respirable as a result of degradation from friction highly both Need for studies of these materials as they occurnin manufacturing and as brake dust - only two known studies of biological activity of dust Gross and Davies - very from samples asbestos lined brakes Need to start conducting studies of biological effects of dust from brakes lined with substitute materials and consider these effects as brake linings are developed lest we find ourselves with unexpected disease among mechanics and others in 10 20 and 30 years these studies should be part of the development process for the sake of public health and protection against product liability Las been insurance is an issue for the asbestos abatement industry friction products industry asbestos industry and the could become a parallel in the EPA is in the process of gathering health and exposure data on these substitute materials and welcomes your sharing with us plans and results of any relevant studies Summary untrol untrol edne !

FILE NAME Brakes BRK DATE 0000 DOC BRK306 DOCUMENT DESCRIPTION AIA - Recommended Work Practices - Fabrication and Use of Asbestos Friction Materials ae S, BS Speer Street USPHS Membrane Airborne Asbestos Fibers Vacuum Cleaning Stations Filter Method For Page 1 Page 2 Page 3 Page 5 Page 7 Page 8 Appendix A Appendix B Appendix C Introduction The Occupational Safety and Health Act was signed into and became effective on April 28 1971.