SacPEMA February General Meeting - Tuesday, February 26, 2019

Synopsis:  New ITRC TPH Risk Assessment Guidance

Complete remediation at petroleum release sites is often infeasible for technical or cost reasons. Many of these sites may be depleted in typical petroleum compounds, such as BTEX, but still heavily contaminated in terms of Total Petroleum Hydrocarbons (TPH).

The traditional single-compound approach of managing petroleum contaminants does not fully identify short- and long-term potential environmental concerns, creates delays and cost run-ups due to residual petroleum contamination encountered during subsurface utility work or redevelopment. States should utilize a risk-based approach to more effectively incorporate TPH data in addition to traditional BTEX data in cleanup and long-term management decisions.

This ITRC comprehensive guidance on making scientific, risk-based decisions at petroleum-contaminated sites will help states develop guidance to address this common class of contaminants. It should provide the user with a greater understanding of TPH, information needed in investigating sites, and evaluating risk and establishing cleanup requirements at TPH contaminated sites. Much of the information required has been published over the past 20 years (TPH carbon range chemistry and toxicity, models and approaches to develop screening levels for direct exposure, vapor intrusion, drinking water and aquatic toxicity, gross contamination, etc.). The ITRC document is a compilation of this existing information presented in an easy-to-use manner for regulators and consultants.

The presentation will provide an overview of the process used to develop the TPH guidance as well as provide an overview of the topics in the guidance.


Speaker Biography: Dr. Thomas Booze, Senior Toxicologist, DTSC

Thomas F Booze, Ph.D. is a Senior Toxicologist for the Human and Ecological Risk Office’s DSMOA group at California’s Department of Toxic Substances Control (DTSC), and served as one of the two co-leaders of the Interstate Technology & Regulatory Council’s (ITRC) TPH Risk Evaluation at Petroleum Contaminated Sites team.  He has also leads the development of DTSC’s guidance for petroleum risk assessment guidance. Tom has over 30 years experience in risk assessment and working in the petroleum industry, consulting, and government.

Date: Tuesday, February 26, 2019

Time: 11:30 a.m. to 1:00 p.m. (registration/networking from 11:30 a.m. to noon)

Where: Firehouse Restaurant, 1112 2nd Street, Sacramento, CA 95814


  • Grilled Balsamic BBQ Chicken - prosciutto, provolone cheese, pickled vegetable hothouse arugula, house-made BBQ glaze
  • Grilled Steak and Crab Salad - chilled crab salad, boiled egg, pickled onion, seasonal garden veggies, red wine vinaigrette
  • Local Pesto Pasta (vegetarian option) - daily pasta, local basil pesto, pine nuts, asiago cheese

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Who We Are:

The Professional Environmental Marketing Association (PEMA) is an organization comprised of local and regional chapters whose membership is involved in business development, sales, marketing, and other related professional activities in the environmental field. The Sacramento California Chapter of PEMA operates in the greater Sacramento metropolitan area which includes Sacramento, El Dorado, Placer, Yolo, and San Joaquin counties.

Sacramento PEMA was founded as a marketing and networking organization in 1995 as an affiliate of the Northern California Chapter of PEMA. Networking encourages formation of business relationships, development of business and teaming opportunities, and exchange of ideas. Sacramento PEMA recently broadened its scope to provide technical and regulatory information of interest to its members.