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Centers of Excellence

Posted by on in Centers of Excellence
Cardno ChemRisk recently presented an analysis examining the cancer risk associated with residential exposure to radioactive components in soils containing coal combustion residuals (CCRs) at the 2017 Society of Toxicology (SOT) annual conference. CCRs are waste products created as a result of burning coal at power plants during the production of electricity, and are one of the largest industrial waste streams generated in the United States. In 2012, approximately 40 percent of CCRs were beneficially used (i.e. concrete and wallboard), while the remaining 60 percent were disposed of in surface impoundments and landfills. Coal and CCRs are composed of various constituents, including naturally occurring radioactive materials. For our research, Cardno ChemRisk scientists utilized reported mean and upper bound isotope-specific radioactivity values to calculate the potential human health cancer risks associated with residential exposure to CCR-containing soil via ingestion of soil, inhalation of particulates emitted from soil, and external exposure to ionizing radiation. The mean cancer risk was 7 x 10-9, and the upper bound cancer risk was 1 x 10-8. Both the mean and upper bound calculated cancer risks were below the Environmental Protection Agency's (EPA) acceptable risk threshold of 1 x 10-6 to 1 x 10-4. These findings suggest that residents living on lots with ground soil containing CCRs are not at an increased risk of cancer due to the presence of naturally occurring radioactive components in CCRs under the exposure parameters analyzed.

If you would like to learn more about Cardno ChemRisk's experience with coal ash, please contact Paul Scott
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Posted by on in Centers of Excellence
Cardno ChemRisk scientists have published a white paper titled "community-focused risk assessment: a valuable tool for manufactured gas plant site remediation". The white paper explains the importance of assessing a community's potential risk from chemical exposures during the remediation of an MGP site. The approach develops airborne fenceline concentration objections (FCOs) for chemicals of concern that are health-protective of all members of a community. Air monitoring concentrations collected during remediation are then compared to the FCOs to ensure that there is no potential risk to community members throughout remediation. Communication distributed throughout this process can also mitigate the concerns of community members and avoid negative publicity and possible litigation. This method can be applied to many remediation scenarios and is tailored towards a community more so than comparison of monitored concentrations to regulatory standards.

Please contact Erin Hynds with any questions.
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Posted by on in Centers of Excellence
Cardno ChemRisk scientists recently published History of Knowledge and Evolution of Occupational Health and Regulatory Aspects of Asbestos Exposure Science: 1900-1975" in the Critical Reviews in Toxicology journal.  The article provides a comprehensive review regarding the evolution of the foundation of occupational medicine and industrial hygiene knowledge with respect to asbestos and its risks from the early 1900s until the early-to-mid 1970s. In this review, we present the decisions, insights, challenges, and hallmark scientific discoveries that had the greatest impact on the historical actions of industrial hygienists in characterizing asbestos exposure and risk. 

If you have any questions or would like further information, please contact Dr. Christy Barlow at This e-mail address is being protected from spambots. You need JavaScript enabled to view it or (720) 305-5837.
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Posted by on in Centers of Excellence

Posted on behalf of author Lindsey Garnick

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Posted by on in Centers of Excellence
Keller and Heckman LLP and Cardno ChemRisk present a webinar series on the changes to the Toxic Substances Control Act (TSCA) resulting from the June 22, 2016 passage of the Frank R. Lautenberg Chemical Safety for the 21st Century Act (Lautenberg Act).

Next Week’s Topic: The Chemical Prioritization Rule and Its Implications

This month we will discuss the Chemical Prioritization Rule proposed on January 17, 2017 by the U.S. Environmental Protection Agency (EPA). Section 6(b)(1)(A) of TSCA now requires EPA to promulgate procedures for prioritizing chemicals for risk evaluations, which must include the criteria for high-priority and low-priority chemical designations. The proposal indicates that EPA is setting a low bar for high-priority designations and that EPA anticipates designating a large number of chemical substances as high-priority. During this webinar we will discuss:

      EPA’s use of evaluation criteria from the Work Plan Chemicals Program;

      A Work Plan Chemical case study;

      The prioritization process and timeline;

      Uses subject to review;

      Preemption implications;

      Predicting future chemicals for prioritization; and

      What manufacturers should do.

Registration for this program is complimentary, but required. Click here to register today.

Webinar Details:

Date:February 8, 2017
Time:1:00 PM ET
Duration:30 Minutes
Hosts:Keller and Heckman with Cardno ChemRisk


For more information please email  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Presented by: Adrienne Timmel (Keller and Heckman LLP) and Rachel Novick (Cardno ChemRisk)

Save the date for upcoming TSCA 30/30's:

March 8, 2017
April 12, 2017
May 10, 2017
June 14, 2017
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