Pittsboro Water Quality Task Force Final Report
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Pp-03-25-New Dots.Qxd 10/23/02 2:41 PM Page 778
pp-03-25-new dots.qxd 10/23/02 2:41 PM Page 778 778 PRAESODYMIUM PRAESODYMIUM [7440–10–0] Symbol Pr; atomic number 59; atomic weight 140.908; a lanthanide–series rare earth element; belongs to the cerium group of rare earths; electron con- figuration [Xe] 4f36s2; partially filled f subshell; valence states +3, +4; most 3+ stable oxidation state +3; electrode potential E°/V (aq) for Pr + 3e¯ ↔ Pr is –2.35 V; atomic radius 1.828 Å; first ionization potential 5.46 eV; one natu- rally–occurring isotope, Pr–141; twenty–nine artificial radioactive isotopes known in the mass range 124, 126–140 and 142–154; the longest–lived isotope Pr–143, t1/2 13.57 day, and the shortest–lived isotope Pr–124, t1/2 1.2 second. History, Occurrence, and Uses Mosander extracted from the mineral lanthana a rare earth fraction, named didymia in 1841. In 1879, Boisbaudran separated a rare earth oxide called samaria (samarium oxide) from the didymia fraction obtained from the mineral samarskite. Soon after that in 1885, Baron Auer von Welsbach iso- lated two other rare earths from didymia. He named them as praseodymia (green twin) and neodymia (new twin) after their source didymia (twin). The name praseodymium finally was assigned to this new element, derived from the two Greek words, prasios meaning green and didymos meaning twin. Praseodymium occurs in nature associated with other rare earths in a rel- atively high abundance. It is more abundant than some common metals such as silver, gold, or antimony. The average concentration of this metal in the earth’s crust is estimated to be 8.2 mg/kg. -
Effects of Intravenous Injections of Radium Bromide. by R
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by PubMed Central EFFECTS OF INTRAVENOUS INJECTIONS OF RADIUM BROMIDE. BY R. BURTON-OPITZ AND GUSTAVE M. MEYER. (From the Laboratories of Physiology and Physiological Chemistry of Colum- bia University, at the College of Physicians and Surgeons, New York.) PLATE XVI. The present study was undertaken with a view of determining in a general way the effects of intravenous administration of ra- dium upon the circulation and respiration. The problem was sug- gested to us by Dr. William J. Gies, under whose guidance a number of researches, dealing with the more extensive question of the action of radium upon animal and vegetable cells, have re- cently been carried on in the laboratories of Columbia University.1 For the radium used in these experiments we are greatly in- debted to Mr. Hugo Lieber. It was supplied to us in the form of the bromide, in preparations of 240 , iooo, and io,ooo activities. The strength of the solution used was the same in all cases. It contained 45 rag. of the dry substance in 25 c. c. of the solvent; each cubic centimeter of the solution, therefore, contained 1.8 rag. of the radium preparation. The amount of the radium present varies directly with the ra- dio-activity. Preparations of ~,5oo,ooo activity are said to repre- sent pure radium bromide3 Taking this figure as the standard of purity, ~ .8 rag. of the radium preparation of io,ooo activity contained approximately only o.o~ 26 mg., the same quantity of the preparation of ~ooo activity contained o.ooi26 rag. -
January 19, 2021 the Honorable Nancy Pelosi the Honorable Mitch
January 19, 2021 The Honorable Nancy Pelosi The Honorable Mitch McConnell Speaker Majority Leader United States House of Representatives United States Senate Washington, DC 20510 Washington, DC 20510 The Honorable Kevin McCarthy The Honorable Charles E. Schumer Republican Leader Democratic Leader United States House of Representatives United States Senate Washington, DC 20510 Washington, DC 20510 Dear Speaker Pelosi, Leader McCarthy, Leader McConnell and Leader Schumer: RE: Urgent Action Needed on President-Elect Biden’s American Rescue Plan On behalf of The United States Conference of Mayors, we urge you to take immediate action on comprehensive coronavirus relief legislation, including providing direct fiscal assistance to all cities, which is long overdue. President-elect Biden’s American Rescue Plan contains such assistance as part of an aggressive strategy to contain the virus, increase access to life-saving vaccines, and create a foundation for sustainable and inclusive recovery. American cities and our essential workers have been serving at the frontlines of the ongoing COVID-19 pandemic for nearly a year. We have been charged with executing herculean public health efforts and an unprecedented emergency response. Despite immense fiscal pressure, your local government partners oversaw those efforts, while trying to maintain essential services and increase our internal capacity to provide support for residents and businesses who have been crippled by a tanking economy. And yet, as the economic engines of our country, local governments will be relied upon to lead the long- term economic recovery our nation so desperately needs, even as, with few exceptions, cities have been largely left without direct federal assistance. -
The Nordic Expert Group for Criteria Documentation of Health Risks from Chemicals 124
1998:12 The Nordic Expert Group for Criteria Documentation of Health Risks from Chemicals 124. Thermal Degradation Products of Polyethylene, Polypropylene, Polystyrene, Polyvinylchloride and Polytetrafluoroethylene in the Processing of Plastics Antti Zitting Nordic Council of Ministers arbete och hälsa vetenskaplig skriftserie ISBN 91–7045–472–8 ISSN 0346–7821 http://www.niwl.se/ah/ah.htm National Institute for Working Life National Institute for Working Life The National Institute for Working Life is Sweden's center for research and development on labour market, working life and work environment. Diffusion of infor- mation, training and teaching, local development and international collaboration are other important issues for the Institute. The R&D competence will be found in the following areas: Labour market and labour legislation, work organization and production technology, psychosocial working conditions, occupational medicine, allergy, effects on the nervous system, ergonomics, work environment technology and musculoskeletal disorders, chemical hazards and toxicology. A total of about 470 people work at the Institute, around 370 with research and development. The Institute’s staff includes 32 professors and in total 122 persons with a postdoctoral degree. The National Institute for Working Life has a large international collaboration in R&D, including a number of projects within the EC Framework Programme for Research and Technology Development. ARBETE OCH HÄLSA Redaktör: Anders Kjellberg Redaktionskommitté: Anders Colmsjö och Ewa Wigaeus Hjelm © Arbetslivsinstitutet & författarna 1998 Arbetslivsinstitutet, 171 84 Solna, Sverige ISBN 91–7045–472–8 ISSN 0346-7821 Tryckt hos CM Gruppen Preface The Nordic Council is an intergovernmental collaborative body for the five countries, Denmark, Finland, Iceland, Norway and Sweden. -
Products Evolved During Hot Gas Welding of Fluoropolymers
Health and Safety Executive Products evolved during hot gas welding of fluoropolymers Prepared by the Health and Safety Laboratory for the Health and Safety Executive 2007 RR539 Research Report Health and Safety Executive Products evolved during hot gas welding of fluoropolymers Chris Keen BSc CertOH Mike Troughton BSc PhD CPhys MInstP Derrick Wake BSc, Ian Pengelly BSc, Emma Scobbie BSc Health and Safety Laboratory Broad Lane Sheffield S3 7HQ This report details the findings of a research project which was performed as a collaboration between the Health and Safety Executive (HSE) and The Welding Institute (TWI). The project aim was to identify and measure the amounts of products evolved during the hot gas welding of common fluoropolymers, to attempt to identify the causative agents of polymer fume fever. Carbonyl fluoride and/or hydrogen fluoride were detected from certain fluoropolymers when these materials were heated to their maximum welding temperatures. Significant amounts of ultrafine particles were detected from all of the fluoropolymers investigated when they were hot gas welded. The report concludes that fluoropolymers should be hot gas welded at the lowest possible temperature to reduce the potential for causing polymer fume fever in operators. If temperature control is not sufficient to prevent episodes of polymer fume fever, a good standard of local exhaust ventilation (LEV) should also be employed. This report and the work it describes were funded by the Health and Safety Executive (HSE). Its contents, including any opinions and/or conclusions expressed, are those of the authors alone and do not necessarily reflect HSE policy. HSE Books © Crown copyright 2007 First published 2007 All rights reserved. -
Safety Assessment of Fluoropolymers As Used in Cosmetics
Safety Assessment of Fluoropolymers as Used in Cosmetics Status: Draft Report for Panel Review Release Date: February 9, 2018 Panel Date: March 5-6, 2018 The 2018 Cosmetic Ingredient Review Expert Panel members are: Chair, Wilma F. Bergfeld, M.D., F.A.C.P.; Donald V. Belsito, M.D.; Ronald A. Hill, Ph.D.; Curtis D. Klaassen, Ph.D.; Daniel C. Liebler, Ph.D.; James G. Marks, Jr., M.D.; Ronald C. Shank, Ph.D.; Thomas J. Slaga, Ph.D.; and Paul W. Snyder, D.V.M., Ph.D. The CIR Executive Director is Bart Heldreth, Ph.D. This report was prepared by Wilbur Johnson, Jr., M.S., Senior Scientific Analyst © Cosmetic Ingredient Review 1620 L STREET, NW, SUITE 1200 ◊ WASHINGTON, DC 20036-4702 ◊ PH 202.331.0651 ◊ FAX 202.331.0088 ◊ [email protected] Commitment & Credibility since 1976 Memorandum To: CIR Expert Panel Members and Liaisons From: Wilbur Johnson, Jr. Senior Scientific Analyst Date: February 9, 2018 Subject: Draft Report on Fluoropolymers A Scientific Literature Review (SLR) on Fluoropolymers was issued on January 8, 2018. The attached use concentration data (fluoro032018data1 and fluoro032018data2) that are included in this draft report were received from the Personal Care Products Council (Council) prior to issuance of the SLR. Data relating to the skin irritation and sensitization potential and ocular irritation potential of formulas containing PTFE (fluoro032018data3) and report comments (fluoro032018pcpc1) were received from the Council after the SLR was issued. These data are included in the draft report, and the Council’s comments have been addressed. Additionally, a memorandum with report comments (fluoro032018pcpc2) was received from the Cosmetic Ingredient Review (CIR) Science and Support Committee of the Council. -
Toxic Hazards to Fire Fighters, Including Effects of Fire Retardants, During Fires and Post-Fire Investigation Activities
David Purser Fire Retardants and their Potential Impact on Fire Fighter Health National Institute of Standards and Technology, Gaithersburgh MD September 30th 2009 Toxic Hazards to Fire Fighters, Including Effects of Fire Retardants, During Fires and Post-Fire Investigation Activities Prof. David Purser Hartford Environmental Research Hatfield, United Kingdom HER David Purser Issues • What are potential health hazards to fire fighters from exposure to toxic fire effluents? • What features of burning materials and fire conditions give rise to these hazards? • What effect do fire retardants have on toxic fire hazards? HER David Purser Role of fire retardant treatments Benefits of fire retardant treatments: 1. Reduce probability that a heat or ignition source will initiate a growing spreading fire – Reduce initial ignition probability – If ignition does occur may result in self- extinction/failure of propagation – Thereby essentially eliminate the toxic and environmental hazards from fires prevented 2. If the initial ignition resistance is overcome may reduce the rate of fire growth – May result in a period of very slow growth up to a critical fire size – Or may provide a slower t2 fire growth curve – In such cases may reduce the rate of toxic hazard development and increase the time available for escape or fire fighting HER David Purser BS7974 fire growth rate curves t^2 fire growth curves 10000 9000 8000 7000 6000 5000 4000 Slow 3000 Medium Heat release rate (Kilowatts) 2000 Fast Ultrafast 1000 Explosion 0 0 100 200 300 400 500 600 Time (s) HER David Purser BS7974 fire growth rate curves CBUF chairs HER David Purser Limitations of fire retardant treatments • Do not provide non-combustibility, but ignition resistance to a heat source up to a design limit. -
DECOMPOSITION PRODUCTS of FLUOROCARBON POLYMERS
criteria for a recommended standard . occupational exposure to DECOMPOSITION PRODUCTS of FLUOROCARBON POLYMERS U.S. DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE criteria for a recommended standard... OCCUPATIONAL EXPOSURE TO DECOMPOSITION PRODUCTS of FLUOROCARBON POLYMERS U.S. DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE Public Health Service Center for Disease Control National Institute for Occupational Safety and Health September 1977 For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402 DHEW (NIOSH) Publication No. 77-193 PREFACE The Occupational Safety and Health Act of 1970 emphasizes the need for standards to protect the health and safety of workers exposed to an ever-increasing number of potential hazards at their workplace. The National Institute for Occupational Safety and Health has projected a formal system of research, with priorities determined on the basis of specified indices, to provide relevant data from which valid criteria for effective standards can be derived. Recommended standards for occupational exposure, which are the result of this work, are based on the health effects of exposure. The Secretary of Labor will weigh these recommendations along with other considerations such as feasibility and means of implementation in developing regulatory standards. It is intended to present successive reports as research and epidemiologic studies are completed and as sampling and analytical methods are developed. Criteria and standards will be reviewed periodically to ensure continuing protection of the worker. I am pleased to acknowledge the contributions to this report on the decomposition products of fluorocarbon polymers by members of the NIOSH staff and the valuable constructive comments by the Review Consultants on the Decomposition Products of Fluorocarbon Polymers and by Robert B. -
NC Mayors Urge BIPARTISAN Solution on Infrastructure Mayor Rennie Brantz
GREENSBORO Mayor Nancy Vaughan Chair CHAPEL HILL Mayor Pam Hemminger Treasurer Contact: Beau Mills (919) 637-0873 ASHEVILLE 07/21/2021 Mayor Esther Manheimer Past Chair APEX Mayor Jacques Gilbert BOONE NC Mayors Urge BIPARTISAN Solution on Infrastructure Mayor Rennie Brantz BURLINGTON Mayor Ian Baltutis The NC Metropolitan Mayors Coalition, a bipartisan group of mayors from North Carolina’s CARRBORO larger cities, today called on the US Congress to push forward on a bipartisan effort to make a Mayor Lydia Lavelle CARY much-needed investment in our nation’s infrastructure. Mayor Harold Weinbrecht CHARLOTTE Mayor Vi Lyles The following is a statement by NC Metro Mayors Coalition Chair, Greensboro Mayor Nancy Vaughan: CONCORD Mayor Bill Dusch “Last month a bipartisan group of US Senators charted a path forward on a critical investment in our CORNELIUS nation’s future. This bipartisan group of 21 Senators, which notably included both Senator Richard Mayor Woody Washam DURHAM Burr and Senator Thom Tillis, came together to sketch out a Bipartisan Infrastructure Framework that Mayor Steve Schewel promises a once in a generation investment in our communities. President Biden endorsed this FAYETTEVILLE Mayor Mitch Colvin framework and Congress now has the opportunity to move forward with the proposal as debate FUQUAY-VARINA Mayor John W. Byrne begins in earnest on legislation to make it a reality. This bipartisan effort could have huge pay off by GASTONIA making our nation more competitive, helping fight climate change and beginning to address the Mayor Walker Reid backlog of highway, transit, water projects and other infrastructure that touch people in every GREENVILLE Mayor P.J. -
Pickard Hall
(iJ University of Missouri Environmental Health & Safety 180 General Services Building Columbia, MO 65211 PHONE 573-882-7018 FAX 573-882-7940 EMAIL [email protected] WEB ehs.missouri.edu September 25, 2018 Mike LaFranzo Senior Health Physicist Region III - Division of Nuclear Materials and Safety US Nuclear Regulatory Commission 2443 Warrenville Road, Suite 210 Lisle, IL 60532-4352 Re: Response to additional information required to continue amendment review of Pickard Hall Characterization -Reference ML No. 18138A148, Mail Control No. 586692, License No. 24-00513-32, Docket No. 030-02278 Dear Mr. LaFranzo: As requested in the May 1, 2018 decommissioning site visit, please see the attached updated Pickard Hall Site Characterization Plan (SCP) and Pickard Hall Decommissioning Project (PHDP) Radiation Safety Manual (RSM). Revisions to the SCP and PHDP RSM address the NRC's comments from the site visit concerning additional descriptions of radiological airborne controls and monitoring along with further elaboration of the licensee's audit program with regard to quality assurance and quality control monitoring efforts of the contractor while performing work with licensed material. Additionally, MU has included all commitments made in previous requests for additional information into the revised SCP and/or revised RSM. The revisions will supersede any commitments made in prior RAI responses. If you have any questions, please do not hesitate to contact me at (573) 882-7018. Felicity Beckfield, MS, CHP Radiation Safety Officer cc: Todd Houts, Director, MU Environmental Health & Safety encl: Attachment 1: Pickard Hall Site Characterization Plan Attachment 2: Pickard Hall Decommissioning Project Radiation Safety Manual • Attachment 1: Pickard Hall Site Characterization Plan • • ,, University of Missouri • Pickard Hall Site Characterization Plan Pickard Hall 405 S. -
Chemical Names and CAS Numbers Final
Chemical Abstract Chemical Formula Chemical Name Service (CAS) Number C3H8O 1‐propanol C4H7BrO2 2‐bromobutyric acid 80‐58‐0 GeH3COOH 2‐germaacetic acid C4H10 2‐methylpropane 75‐28‐5 C3H8O 2‐propanol 67‐63‐0 C6H10O3 4‐acetylbutyric acid 448671 C4H7BrO2 4‐bromobutyric acid 2623‐87‐2 CH3CHO acetaldehyde CH3CONH2 acetamide C8H9NO2 acetaminophen 103‐90‐2 − C2H3O2 acetate ion − CH3COO acetate ion C2H4O2 acetic acid 64‐19‐7 CH3COOH acetic acid (CH3)2CO acetone CH3COCl acetyl chloride C2H2 acetylene 74‐86‐2 HCCH acetylene C9H8O4 acetylsalicylic acid 50‐78‐2 H2C(CH)CN acrylonitrile C3H7NO2 Ala C3H7NO2 alanine 56‐41‐7 NaAlSi3O3 albite AlSb aluminium antimonide 25152‐52‐7 AlAs aluminium arsenide 22831‐42‐1 AlBO2 aluminium borate 61279‐70‐7 AlBO aluminium boron oxide 12041‐48‐4 AlBr3 aluminium bromide 7727‐15‐3 AlBr3•6H2O aluminium bromide hexahydrate 2149397 AlCl4Cs aluminium caesium tetrachloride 17992‐03‐9 AlCl3 aluminium chloride (anhydrous) 7446‐70‐0 AlCl3•6H2O aluminium chloride hexahydrate 7784‐13‐6 AlClO aluminium chloride oxide 13596‐11‐7 AlB2 aluminium diboride 12041‐50‐8 AlF2 aluminium difluoride 13569‐23‐8 AlF2O aluminium difluoride oxide 38344‐66‐0 AlB12 aluminium dodecaboride 12041‐54‐2 Al2F6 aluminium fluoride 17949‐86‐9 AlF3 aluminium fluoride 7784‐18‐1 Al(CHO2)3 aluminium formate 7360‐53‐4 1 of 75 Chemical Abstract Chemical Formula Chemical Name Service (CAS) Number Al(OH)3 aluminium hydroxide 21645‐51‐2 Al2I6 aluminium iodide 18898‐35‐6 AlI3 aluminium iodide 7784‐23‐8 AlBr aluminium monobromide 22359‐97‐3 AlCl aluminium monochloride -
DOCUMENT RESUME ED 071 911 SE 015 548 TITLE Project Physics
DOCUMENT RESUME ED 071 911 SE 015 548 TITLE Project Physics Teacher Guide 6, The Nucleus. INSTITUTION Harvard Univ., Cambridge, Mass. Harvard Project Physics. SPONS AGENCY Office of Education (DHEW) Washington, D.C. Bureau of Research. BUREAU NO BR-5-1038 PUB DATE 68 CONTRACT OEC-5-10-058 NOTE 235p.; Authorized Interim Version EDRS PRICE MF-$0.65 HC-S9.87 DESCRIPTORS Instructional Materials; *Multimedia Instruction; *Nuclear Physics; Physics; *Radiation; Science Activities; Secondary Grades; *Secondary School Science; *Teaching Glides; Teaching Procedures IDENTIFIERS Harvard Project Physics ABSTRACT Teaching procedures of Project Physics Unit 6are presented to help teachers make effectiveuse of learning materials. Unit contents are discussed in connection withteaching aid lists, multi-media schedules, schedule blocks, andresource charts. Brief summaries are made for transparencies, 16mm films, and reader articles. Included is information about the backgroundand development of each unit chapter, procedures in demonstrations, apparatus operations, notes on the student handbook, andan explanation of film loops. Additional articlesare concerned with objects dated by radiocarbon, radiation safety, propertiesof radiations, radioactive sources, radioactivity determinationby electroscopes, and radiation detecting devices.Scalers, counters, Geiger tubes, and cadmium selenide photocellsare analyzed; and a bibliography of references is given, Solutionsto the study guide are provided in detail, and answers to test itemsare suggested. The sixth unit of the text, with marginal commentson each section, is also compiled in the manual. The work of Harvard ProjectPhysics has . been financially supported by: the Carnegie Corporation ofNew York, the Ford Foundation, the National Science Foundation,the Alfred P. Sloan Foundation, the United States office of Education,and Harvard University.