Constituents of potential concern for human health risk assessment of petroleum fuel releases

TRRP Training: 2022 Program

presented by: GSI Environmetal Inc.

Texas Risk Reduction Program regulations (TRRP; 30 TAC 350) establish consistent risk-based protocols for assessment and response to soil, groundwater, or surface water impacts associated with environmental releases of regulated wastes or substances.

Presented by GSI Environmental Inc., this popular and informative training series is a must for professionals who need a working understanding of TRRP and those needing to stay up-to-date with the latest TCEQ TRRP guidance and policies.

TRRP Training Course (2 Days): Provides an overview of the TRRP framework and step-by-step training on property assessment and response action procedures established under the TRRP rule

Attendees will become acquainted with rules, key guidance and policies covering affected property assessments, protective concentration levels, and response actions. The course material presents strategies for efficient project management in compliance with TRRP and explains the various report forms adopted by TCEQ.

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Dates and Location

Dates

June 14th and 15th, 2022

Location

Crowne Plaza River Oaks 2712 SW Freeway Houston, Texas 77098 713.523.8448 http://www.crowneplaza.com/

Price and Registration

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(Paid by May 1, 2022)
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Authors: Richard L. Bowers, Jonathan W. N. Smith

Published: October 2014 in Quarterly Journal of Engineering Geology and Hydrogeology volume 1-40.

Abstract

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This document provides simple guidelines for selecting constituents of potential concern for human health risk-assessments associated with releases of petroleum-based vehicle fuels to soil and groundwater. Petroleum-based vehicle fuels consist of mixtures of hundreds to thousands of individual hydrocarbon constituents, including numerous potentially hazardous substances. Releases of such fuels to the environment can potentially cause adverse human health effects, safety hazards, ecological and aesthetic impacts, or other concerns, all of which should be considered in an assessment of site risks. Evaluating human health risks can prove especially challenging due to i) variability of fuel composition, ii) weathering of fuels following release to the environment, iii) site-specific heterogeneity of physical conditions, and iv) uncertainties in toxicity and chemical/physical property information for potential risk drivers.
It is impracticable to quantify health risks associated with every constituent of a petroleum fuel release. Fortunately, in reality such efforts are not necessary to effectively manage risks. A focused evaluation of an appropriate subset of the highest priority fuel constituents (i.e., typical risk-driving fuel constituents for which toxicity criteria are established and which are relatively mobile in the environment) can support robust management of all potential risks. This approach can also help eliminate unnecessary expense and effort on chemical analyses and risk-evaluation of constituents that rarely (or never) give rise to unacceptable human health risks and may be easier to follow and communicate to stakeholders. In practical terms, at sites where risk management action is found to be necessary to address risk-driving constituents, such action will in most cases also address related, but lesser, risks associated with the presence of other (unquantified) substances.
Selection of appropriate Constituents of Potential Concern (COPCs) is an important part of the risk assessment and management process, helping to ensure that the risk assessment identifies any unacceptable risks and allows an assessor to effectively manage those risks. Typically, only a small number of COPCs account for a large majority of potential risks associated with potential human exposures to fuel constituents in soil, soil gas or groundwater. In other words, the risk ‘footprint’ of most fuel constituents will most often be contained within the footprint of key risk-driving COPCs. Nevertheless, selection of COPCs should consider both the risk assessment and possible remedial treatment perspective in order to sufficiently mitigate any actual risks.