Renee M. Kalmes, M.S.P.H
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Joshua R Maskrey, CIH
Joshua R Maskrey, CIH Current Position Summary of Experience Senior Health Scientist Mr. Joshua Maskrey is a Senior Health Scientist and board certified industrial hygienist with Cardno ChemRisk in the Pittsburgh, PA office. His primary training and areas of Discipline Areas expertise include industrial hygiene, quantitative exposure assessment, human health risk > Industrial Hygiene assessment, air modeling, chemical engineering, organic chemistry, inorganic chemistry, > Exposure and Risk material and energy transfer, and thermodynamics. At Cardno ChemRisk, Joshua Assessment maintains a broad risk assessment practice focused on environmental, health and safety > Chemical services. He has expertise in the design and implementation of industrial hygiene and Engineering occupational health assessments for clients. He has managed and executed numerous > Computational chemical exposure modeling projects. He has also provided scientific support to expert Modeling and witnesses in litigation projects and quantitative modeling and exposure assessment Statistical Services support for non-litigation projects. He is a graduate of the University of Pittsburgh, where > Litigation Support he earned a B.S. in Chemical Engineering with a certificate in Nuclear Engineering. Significant Projects Years' Experience 8 Years Hazard Assessments, Exposure Assessments and Modeling Experienced in the use of multiple chemical exposure modeling programs published by Joined Cardno regulatory agencies and in peer-reviewed publications including IH MOD 2.0, 2014 CHEMSTEER, -
Potential Toxic Effects of Chromium, Chromite Mining and Ferrochrome Production: a Literature Review
Chromium, Chromite Mining and Ferrochrome Production 2012 Y Potential Toxic Effects of Chromium, Chromite Mining and Ferrochrome Production: A Literature Review MiningWatch Canada May 2012 This document is part of a series produced by MiningWatch Canada about the risks of chromium exposure. Additional fact sheets summarizing risks to the environment, chromite workers and nearby populations are also available online at: www.miningwatch.ca/chromium Chromium, Chromite Mining and Ferrochrome Production 2012 Executive Summary Chromium (Cr) is an element that can exist in six valence states, 0, II, III, IV, V and VI, which represent the number of bonds an atom is capable of making. Trivalent (Cr-III) and hexavalent (Cr-VI) are the most common chromium species found environmentally. Trivalent is the most stable form and its compounds are often insoluble in water. Hexavalent chromium is the second most stable form, and the most toxic. Many of its compounds are soluble. Chromium-VI has the ability to easily pass into the cells of an organism, where it exerts toxicity through its reduction to Cr-V, IV and III. Most Cr-VI in the environment is created by human activities. Chromium-III is found in the mineral chromite. The main use for chromite ore mined today is the production of an iron-chromium alloy called ferrochrome (FeCr), which is used to make stainless steel. Extensive chromite deposits have been identified in northern Ontario 500 km north-east of Thunder Bay in the area dubbed the Ring of Fire. They are the largest deposits to be found in North America, and possibly in the world. -
Filed Comments
Comments of Environmental Defense Fund, Earthjustice, Natural Resources Defense Council, Physicians for Social Responsibility, and Union of Concerned Scientists On Candidates Under Consideration for Appointment to the Toxic Substances Control Act, Science Advisory Committee on Chemicals Docket ID: EPA-HQ-OPPT-2020-0135 Submitted October 29, 2020 Introduction Environmental Defense Fund, Earthjustice, Natural Resources Defense Council, Physicians for Social Responsibility, and Union of Concerned Scientists submit these comments on the list of nominees being considered for membership on the Environmental Protection Agency’s Toxic Substances Control Act (TSCA) Science Advisory Committee on Chemicals (SACC).1 This committee is responsible for providing expert advice to EPA’s Office of Pollution Prevention and Toxics “with respect to the scientific and technical aspects of risk assessments, methodologies, and pollution prevention measures or approaches supporting implementation” of the Frank R. Lautenberg Chemical Safety for the 21st Century Act (Lautenberg Act). According to the Federal Advisory Committee Act (FACA) and EPA’s Peer Review Handbook, this committee must be both balanced and free of members who have actual or perceived conflicts of interest or an appearance of a loss of impartiality. EPA’s “selection criteria” for the SACC similarly include the “[a]bsence of financial conflicts of interest or the appearance of a loss of impartiality.” 85 Fed. Reg. 16,094-05 (Mar. 20, 2020).2 We have reviewed the list of nominees under consideration for membership and are concerned about actual or potential conflicts of interest or appearances of a loss of impartiality (or both) with respect to many of the 61 nominees. We believe the information we provide in these comments on 19 of the nominees – which is from public sources – is sufficient to find that actual or potential conflicts of interest or an appearance of a loss of impartiality (or both) exist. -
TOXICOLOGICAL PROFILE for CHLORINATED DIBENZO-P-DIOXINS
TOXICOLOGICAL PROFILE FOR CHLORINATED DIBENZO-p-DIOXINS U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES Public Health Service Agency for Toxic Substances and Disease Registry December 1998 CDDs ii DISCLAIMER The use of company or product name(s) is for identification only and does not imply endorsement by the Agency for Toxic Substances and Disease Registry. CDDs iii UPDATE STATEMENT A toxicological profile for chlorinated dibenzo-p-dioxins was released in February 1998. This edition supersedes any previously released draft or final profile. Toxicological profiles are revised and republished as necessary, but no less than once every three years. For information regarding the update status of previously released profiles, contact ATSDR at: Agency for Toxic Substances and Disease Registry Division of Toxicology/Toxicology Information Branch 1600 Clifton Road NE, E-29 Atlanta, Georgia 30333 . CDDs v FOREWORD This toxicological profile is prepared in accordance with guidelines developed by ATSDR and EPA. The original guidelines were published in the Federal Register on April 17, 1987. Each profile will be revised and republished as necessary. The ATSDR toxicological profile succinctly characterizes the toxicologic and adverse health effects information for the hazardous substance being described. Each profile identifies and reviews the key literature (that has been peer-reviewed) that describes a hazardous substance's toxicological properties. Other pertinent literature is also presented but described in less detail than the key studies. The profile is not intended to be an exhaustive document; however, more comprehensive sources of specialty information are referenced. Each toxicological profile begins with a public health statement, which describes in nontechnical language a substance's relevant toxicological properties. -
Dennis J. Paustenbach, Ph.D., C.I.H., DABT
Dennis J. Paustenbach, Ph.D., C.I.H., D.A.B.T. President of Paustenbach and Associates Paustenbach and Associates 970 West Broadway Suite E - 395 Jackson, WY 83001 (415) 509-4085 [email protected] Academic and Professional Profile Dr. Dennis Paustenbach is a board-certified toxicologist and industrial hygienist with nearly 35 years of experience in risk assessment, environmental engineering, ecotoxicology, and occupational health. Since April of 2019, he has been the President of Paustenbach and Associates and their senior consultant. The firm currently has eight employees. In 1985, he founded ChemRisk, which ultimately became the largest human and ecological risk assessment group in the U.S. They specialized in risk analysis of chemical and radionuclides in air, water, soil, sediments, consumer products, pharmaceuticals, and medical devices, from 1985- 2019 (except for the years at Exponent). ChemRisk was a joint venture with McLaren-Hart ENV, Engineering. In 1996, Dennis became President and Chief Executive Officer (CEO) of McLaren-Hart Environmental, a nationwide consulting firm of 600 persons (number 100 in the US at the time). He was the youngest professional (age 44) in the U.S. to head a national environmental firm at $700M (revenue). In 1997, Dennis joined Exponent and was a Group President responsible for leading the Health Sciences division (approximately 140 professors). In 2003, he left Exponent and he restarted ChemRisk as a separate enterprise. In 2015, the management team sold the firm to Cardno, an Australian based environmental services firm. He was President of Cardno-ChemRisk from 2015 until he left the firm in April 2019. -
April 7,1998
BASELINE HUMAN HEALTH RISK ASSESSMENT OF THE FORMER WESTINGHOUSE TRANSFORMER PLANT, SHARON, PENNSYLVANIA '\J- APRIL 7,1998 prepared by: ChemRlsk* A Service of McLaren/Hart Environmental Engineering Corporation Stroudwater Crossing 1685 Congress Street Portland, Maine 04102 (207)774-0012 A Division of McLaren/Hart n ,} - - o n Environmental Engineering ' l\ \\\1\) J / 0 J fihemRisk A Division of McLaren/Hart v Environmental Engineering 'i R i 0 3 7 9 f) "V BASELINE HUMAN HEALTH RISK ASSESSMENT OF THE FORMER WESTINGHOUSE TRANSFORMER PLANT, SHARON, PENNSYLVANIA ChemRisk Project No, 12.0802130.018.001 April 7,1998 Prepared for: Westinghouse Electric Corporation 11 Stanwix Street ' Pittsburgh, PA 15222-1384 Prepared by: ChemRisk* - A Service of McLaren/Hart Environmental Engineering Corporation 1685 Congress Street Portland, ME 04102 Russell E. Keenan, Ph.D. Mark C. Maritato Chief Health Scientist ..*'•' . Senior Health Scientist Vice President v .. •AR30379 I TABLE OF CONTENTS . "^ 1.0 INTRODUCTION AND PURPOSE .................................... 1-1 1.1 Site Background............................................... 1-2 1.2 Regulatory History .......................................,'.;'..; 1-3 1.3 Urban Renewal Land Use Plan ......,...............,....;.. ^..... 1-3 1.4 Risk Assessment Conceptual Site Model;,................,.......'... 1-4 2.0 DATA EVALUATION ......1.........;.,............................ M 2.1 General Data Discussion ......................................... 2-1 2.2 DataGrouping ............................................... -
Rocky Flats Plant Site Environmental Report 1993 Highlights
(tff-Z,hN-<{2 Rocky Flats Plant Site Environmental Report 1993 Highlights The Rocky Flats Plant Site Environmental Report is developed each year as a means of informing the Department of Energy, federal and state regulatory agencies, and the public, of environmental activities performed at the Rocky Flats Plant. The report provides detailed technical data on environmental monitoring and remediation programs, resulting in an overall insight on the impact that those activities have on the environment and on public health. WIO11 1 DlSTRTBUTION OF THIS DOCUMENT IS UNLIMITED The Rocky Flats Plant at a glance .. O Built in 1951, began operations in 1952. O Owned by the Department of Energy as one of several historically constructed production plants in the weapons complex. O Located 16 miles northwest of Denver, Colorado, on 6,550 acres in northern Jefferson County. O Situated within a 50-mile radius of approximately 2.1 million people. O Curtailed many production activities in 1989. O Operated by EG&G, Inc., as of January 1990. O Began new mission of environmental restoration, waste management, decontamination and decommissioning, and economic development in The historical mission of the Rocky Flats Plant has been to develop and fabricate nuclear weapons components from radioactive and nonradioactive materials. Its manufacturing and production activities were crucial to the nation's nuclear weapons defense system. The plant was responsible for fabricating plutonium, uranium, beryllium, and stainless steel. Primary production activities included metal fabrication and assembly, metal recovery and purification of nuclear materials, and related quality and environmental control functions. This mission changed in January 1992 when President Bush announced that certain planned weapons systems had been canceled. -
Project Tasks 3&4 Final Draft Report Reconstruction Of
PROJECT TASKS 3&4 FINAL DRAFT REPORT RECONSTRUCTION OF HISTORICAL ROCKY FLATS OPERATIONS & IDENTIFICATION OF RELEASE POINTS AUGUST 1992 Prepared by: ChemRiskB A Division of McLaredHart 1135 Atlantic Avenue Alameda, CA 94501 S W-A-0056 12 c I TABLE OF CONTENTS 1.0 INTRODUCTION ............................................... 1 1.1 The Rocky Flats Toxicologic Review and Dose Reconstruction Project ..... 1 1.2 Documentation of Rocky Flats History .................................5 REFERENCES ...................................................... 8 2.0 DESCRIPTION OF THE INVESTIGATIVE PROCESS ...................... 9 2.1 Review of Classified and Controlled Access Records ...................9 2.1.1 The Building 706 Technical Library . : ....................... 11 ... 2.1.2 The Building 881 Archives ................................. 12 ... .. 2.1.3 Classified Safety Analysis Files .............................. 13 .. 2.2 Unclassified Rocky Flats Information Sources ....................... 13 ..... 2.2.1 The Environmental Master File ............................. 13 2.2.2 Industrial Safety Office Files ............................... 16 2.2.3 Occurrence Management Department Records ................. 16 2.2.4 Federal Government Information Sources ..................... 17 2.2.4.1 The Federal Records Center ......................... 17 2.2.4.2 DOE Effluent Information System .................... 23 2.2.4.3 DOE On-site Discharge Information System ............. 25 2.2.4.4 The DOE Energy Library in Germantown, Maryland ...... 25 . 2.2.5 Pertinent -
Brent D. Kerger, Ph.D., DABT Principal Scientist | Health Sciences 15615 Alton Parkway, Suite 350 | Irvine, CA 92618 (949) 242-6046 Tel | [email protected]
Brent D. Kerger, Ph.D., DABT Principal Scientist | Health Sciences 15615 Alton Parkway, Suite 350 | Irvine, CA 92618 (949) 242-6046 tel | [email protected] Professional Profile Dr. Brent Kerger is a Principal Scientist in Exponent’s Health Sciences Center for Toxicology and Mechanistic Biology. A board-certified toxicologist, Dr. Kerger specializes in the study of environmental chemical fate and transport, exposure assessment, pharmacokinetics, and adverse human health effects. He has over 36 years of experience conducting and managing laboratory, field, and clinical studies of exposure, toxicology, epidemiology, and disease causation analysis. He provides scientific and strategic consultation regarding regulatory and litigation matters including 27 years of environmental chemistry and toxicology expert witness experience. He has in-depth expertise regarding asbestos, talc, dioxins and furans, PCBs, PAHs, chlorinated solvents, benzene and petroleum products, irritant gases, pesticides, flavoring chemicals, and heavy metals. He has over 33 years of experience as a professional toxicologist focusing on: • Multi-disciplinary research in fate/transport, exposure assessment and toxicokinetics; • Design and implementation of studies to characterize exposure/dose and toxicity; • Human health and ecological risk assessments including complex indirect pathways; • Evidence-based approaches for analysis of epidemiologic studies; and • Disease causation analysis using the Hill Criteria and alternative cause assessment. A board-certified toxicologist since 1994, Dr. Kerger has extensive experience in evaluating scientific issues involving claims of chemical causation or increased risk of diseases in humans in regulatory and litigation settings. He has thoroughly researched key toxicological issues surrounding human exposures to a broad range of chemicals and mineral dusts. Dr. Kerger guides the optimized research capabilities and access to resources (expertise and information) that promote an integrated, multi-disciplinary perspective to addressing scientific issues.