San Francisco Bay Branch Meeting - 12th Annual DTSC Regulatory Update




The San Francisco Bay Branch is Pleased to Present:

Ms. Janet Naito, Branch Chief
Brownfields and Environmental Restoration Program (Cleanup Program)

Mr. Brian Lewis
Unit Chief, Geological Services Unit, Brownfields and Environmental Restoration Program (Cleanup Program)

Ms. Kimi Klein, Ph.D.
Staff Toxicologist, Brownfields and Environmental Restoration Program (Cleanup Program)

Myrto Petreas, Ph.D.
MPH, Chief, Environmental Chemistry Branch, Environmental Chemistry Laboratory (ECL)   



The mission of the Department of Toxic Substances Control (DTSC) is to protect California’s citizens and environment from the harmful effects of toxic substances through the restoration of contaminated resources, enforcing hazardous waste laws, reducing hazardous waste generation, and encouraging chemically safer products.

Join Janet Naito, Brian Lewis, Kimi Klein, and Myrto Petreas for a discussion of programs and new activities at DTSC.   They will discuss the agency's current priorities, emerging issues, and guidance documents.  Topics will include:

DTSC News 

  • Program and personnel changes
  • Independent Review Panel 
  • Groundwater Audits update
  • Safer Consumer Products 
  • Toxicity criteria regulations
  • Update on Cal/EPA vapor intrusion workgroup
  • Updates on Human Health Risk Assessment notes (Dioxins, Total Petroleum Hydrocarbons, others.) 

Environmental Chemistry Laboratory

  • Emerging Issues (Per- and Poly-fluorinated substances and identification of “unknown” chemicals)  



Ms. Janet Naito is Branch Chief for the Brownfields and Environmental Restoration Program (Cleanup Program) in the Berkeley Office. In her role as branch chief, Ms. Naito manages a staff of 35 who oversee soil, soil vapor, and groundwater contamination sites throughout the San Francisco Bay region and the North Coast. Ms. Naito also supports policy, regulatory and cost recovery issues in the department. Ms. Naito joined DTSC in 1987 and is a UC Berkeley graduate.

Brian Lewis, PG, CEG, and CHG is the Chief of the Geological Services Unit that is responsible for providing technical support for permitting, closing, and remediating hazardous waste sites. Mr. Lewis has over 34 years of experience, conducting water resources and contaminant hydrogeology projects.  He obtained his A.B. degree in geology with an emphasis in water resources from Occidental College. He has worked for the Department of Water Resources, State Water Resources Control Board, and the US Environmental Protection Agency’s Headquarters (on loan from DTSC). Mr. Lewis is the State Representative on the U.S. EPA's Groundwater Forum and served for over two decades on GRA’s Board of Directors.

Kimiko A. Klein, Ph.D., is a staff toxicologist emerita with the Human and Ecological Risk Office of the DTSC.  She is a regulatory toxicologist and risk assessor and has worked for the DTSC since 1990.  She was involved in the training and use of a multimedia exposure model (CalTOX) that included modules for sensitivity and uncertainty analysis of various exposure parameters (1993-1997), in the creation of the DTSC Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air (2005), the publication of California Human Health Screening Levels (CHHSLs) (2005), and the update of the DTSC Preliminary Endangerment Assessment (PEA) Guidance Manual (2015).  Dr. Klein has taught numerous courses in regulatory risk assessment and exposure assessment at professional societies, the University of California at Davis, Chulalongkorn University and Cheng Mai University in Thailand and has co-authored papers and textbook chapters on human health risk assessment.  Dr. Klein was honored on the State of California Women’s History Calendar as an environmental scientist (June 2013).  
Myrto Petreas is the Chief of the Environmental Chemistry Branch of DTSC. She is a chemist and epidemiologist interested in exposure assessment. She manages interdisciplinary studies to assess exposures to environmental contaminants and their health effects to humans and wildlife. Her Branch provides analytical and consultation support to DTSC and Cal/EPA on dioxin-like chemicals, flame retardants, Perfluoroalkyl and Polyfluoroalkyl Substances (PFASs), and other chemicals of emerging concern. She serves on national and international committees on issues related to dioxin-like chemicals and flame retardants. She is the recipient of several federal grants and has numerous publications.  



Fish – Baked fresh Atlantic salmon with herb butter, served with rice pilaf and fresh seasonal vegetables
Meat – Rosemary chicken, garlic mash potatoes and fresh vegetables
Vegetarian – Portobello mushroom ravioli with an Alfredo pesto sauce



$45 for Members
$50 for Non-Members
$10 for Student attendees



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GRA San Francisco Bay Branch is interested in supporting university science students. Our Scholastic Sponsorship Program is an opportunity to publicize your business while contributing toward a good cause. Your sponsorship will be acknowledged in the announcement, at the meeting, and space will be provided for a small display and brochures. Please contact Abigail Madrone at or at 530-756-5905 for details.

 If you have any announcements or questions, please contact the Branch President, Eric Sandberg ( at 415-786-7244, or Branch Treasurer David W. Abbott ( at 510-928-4543.

We are actively looking for potential speakers. If you have a topic or suggestion, please contact the Branch President, Eric Sandberg ( at 415-786-7244


Wed, April 19, 2017
5:30 p.m. - 8:45 p.m.

Event has ended


Hs Lordships
199 Seawall Drive
Berkeley, California 94710