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Joshua R Maskrey, CIH

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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, ART, MCCEM, AERMOD and others. Education Developed, and provided oversight for development of, benzene volatilization models, BS, Chemical airborne benzene concentration models and exposure assessments resulting from trace Engineering, and non-trace benzene contamination of various solvents or consumer products including University of gasoline, diesel fuel, asphalt, automotive cleaners, industrial solvents, roofing products, Pittsburgh, roofing adhesives, general adhesives, lubricants, grease, paints, paint strippers, December 2013 ethylbenzene, toluene, xylenes, naphtha, mineral spirits, hexane, creosote and − Minor: Chemistry carbolineum. − Certificate: Performed stack emissions modeling for a variety of facilities using AERMOD. Created an Nuclear approach for assessment of the effects of varying stack parameters on ground level Engineering concentrations of chemical contaminants. Assisted in development of a chemical contaminant list and assessment of hazards posed by chemical contaminants for various products of members of an industry trade association. Prepared inhalation exposure models for use in California Proposition 65 assessments for consumer products. Performed quantitative inhalation and dermal assessment work to supported multiple industry trade groups with reviews and commenting on USEPA Toxic Substances Control Act (TSCA) rulemaking and draft risk evaluation documents for chemical substances evaluated using the new TSCA framework mandated by the 2016 Lautenberg Act. JOSHUA R MASKREY, CIH Page 1 of 11 www.cardnochemrisk.com JANUARY 12, 2021 www.cardno.com Managed projects in which historical chemical analyses and exposure assessments were performed for brake and carburetor cleaner products, creosote and naphtha. Performed building ventilation assessments for use in California Proposition 65 facility emission characterizations for vapor and particulate compounds. Performed structure-activity relationship analyses for novel chemistries and polymers to support toxicological evaluations. Supported a project involving model assessments and analyses for models used or intended to be used in TSCA risk evaluations. Model evaluations of ART, Stoffenmanager, ECETOC TRA, IHMOD and CHEMSTEER were performed. Led strategic development of the air modeling portion of a high-throughput, screening- level modeling tool used to quickly identify and prioritize potentially hazardous inhalation toxicants used in a number of batching processes. Assisted with inhalation and dermal exposure assessment for bifenthrin exposure to personnel handling timber products. Designed a dermal exposure assessment for micronized copper exposure to children due to contact with treated lumber on playgrounds. Assisted with indoor air modeling approach for peroxy- compounds such as hydrogen peroxide and peracetic acid. Developed screening-level generation rate modeling tool that allowed users to rapidly estimate generation rates from small project spills. Tool allowed for entry of up to 30 chemical components. Developed approach for worst-case modeling of VOC and formaldehyde exposure concentrations associated with spills for logistics company. Performed inhalation and dermal exposure modeling specific to a number of industrial and commercial scenarios where trichloroethylene (TCE) or perchloroethylene (PCE) were used as solvents. Performed a literature review and analysis of variable sensitivity to acid and alkali burns after dermal contact with caustic substances in humans. Assisted in the design of indoor air concentration models for formaldehyde emitted from wood containing urea-formaldehyde resin. Performed Monte Carlo sensitivity analysis used in an exposure assessment for inhalation of diacetyl from microwave popcorn sources. Industrial Hygiene and Environmental Projects Managed and/or executed exposure sampling projects involving short- and long-term air sampling for asbestos (chrysotile, amosite, crocidolite, other amphiboles), carbon monoxide, crystalline silica, hexavalent chromium, mercury, lead, hydrogen sulfide, mercaptans (thiols), metal carbonyls, nitrogen oxides, ozone, respirable dust, welding fume metals, wood dust, peroxyacetic acid, and volatile organic compounds (including benzene, ethylbenzene, toluene, xylenes, formaldehyde, hexane, methyl bromide and JOSHUA R MASKREY, CIH Page 2 of 11 JANUARY 12, 2021 others). Experienced in the review and implementation of OSHA and NIOSH sampling methods for industrial hygiene studies. Designed and executed multiple simulation studies used to re-create and assess historical exposure to chrysotile and amphibole asbestos, VOCs, diacetyl or other chemical or physical species. This work included development of highly detailed study protocols, air, surface or bulk sampling designs, study environmental controls, development of institutional review board documentation, and design or approval of health and safety training. For some studies, historical formulations of products were recreated in a laboratory environment. Completed industrial hygiene assessments of employees and contractors during petroleum refinery turnarounds (outages). These projects involved collection of personal and area samples for a variety of airborne species, assessment of heat stress, assessment of ventilation conditions in confined spaces, noise exposure assessments, PPE and safety audits, identification of emergencies, and understanding of refinery processes. Led or assisted with exposure assessments of petroleum refinery operators at the following types of units: crude distillation (atmospheric and vacuum), delayed cokers, catalytic crackers, hydrocrackers, hydrotreaters, hydrodesulfurizers, alkylation units, isomerizers, water treatment plants, and supporting chemical production units. Completed multiple baseline exposure assessments at petroleum refineries involving detailed personnel interviews and development of similar exposure groups (SEGs). SEGs were developed for operations, maintenance, and other support personnel. Complete job- exposure task lists were created and quantitative and qualitative rankings of potential exposures were developed. The assessments also involved personal air sampling for various VOCs, toxic gases (carbon monoxide, hydrogen cyanide, hydrogen sulfide, nitrogen dioxide), particulates and noise. Developed a site-specific sampling plan for a construction site with known contaminated soils. Participated in an exposure assessment of petroleum logistics personnel involved in the loading and unloading of both sweet and sour crude oils. The assessment involved personal air sampling for benzene, toluene, ethylbenzene, xylene, aliphatic hydrocarbons and hydrogen sulfide. Led a risk evaluation and risk communication project for three reduced sulfur compounds commonly used as odorants in natural gas processes: tert-butyl thiol, n-propyl thiol, and isopropyl thiol. Reviewed industrial hygiene data containing benzene and 1,3-butadiene exposure information for workers who handled debutanized aromatic concentrate. Designed and completed a simulation study in which worker exposure to benzene, toluene, xylenes and ethylbenzene during use of equipment containing 2-stroke engines were determined. JOSHUA R MASKREY, CIH Page 3 of 11 JANUARY 12, 2021 Designed a simulation study in which chrysotile-containing gaskets were removed from historical refrigeration compressors. The study involved measurement of personal and take-home exposures to chrysotile asbestos. Co-designed a simulation study involving determination of personal and take-home exposures to crocidolite and chrysotile from cutting of asbestos containing pipe. Participated in multiple simulation studies in which recreations of historical chrysotile asbestos work scenarios were performed and sampled to characterize worker, bystander and/or take-home exposures. Co-designed a simulation study involving reformulation of a historical chrysotile- containing air duct sealer. Participated in the reformulation of the
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