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Nature Walk

TPH Working Group Series, Volumes 1-5

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TPH Working Group Series, Volumes 1-5

The overlying theme to this series is the importance of exposure potential when defining human health risk. The fate and transport of a chemical or mixture defines the exposure route, and in conjunction with receptor properties, concentrations at receptors. If fate and transport is not considered, unrealistic human health risks could be calculated, resulting in misinformed decisions about site clean-up and regulatory guidance. We hope you find these documents to be useful in your efforts to evaluate and determine acceptable risk-based criteria at petroleum sites

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Volume 1: Petroleum Hydrocarbon Analysis of Soil and Water in the Environment

Wade Weisman

US $19.95, Year 98, pp.98 ISBN 1-884-940-14-5 

This document provides an overview of the complexities of petroleum hydrocarbon characterization and risk assessment, and a discussion on the analytical methods available. In addition, to descriptions about general analytical methods, a summary is provided of a proposed GC-Based analytical method, developed by the Working group, that reports hydrocarbon results in equivalent carbon number groups or fractions.

*Available in PDF only

Volume 2: Composition of Petroleum Mixtures

Thomas L. Potter; Kathleen E. Simmons

US $39.95, Year 98, pp.102 ISBN 1-884-940-19-6 

This document describes the chemical composition and characteristics of petroleum fuel mixtures. It presents the salient features of petroleum chemistry, describes petroleum fuel mixture production, and displays composition data tables that are summaries from many sources for each of the petroleum fuel mixtures.

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Volume 3: Selection of Representative TPH Fractions Based on Fate and Transport Considerations

John Gustafson; Joan Griffith Tell; Doug Orem

US $19.95, Year 97, pp.102 ISBN 1-884-940-12-9

This document summarizes the methods used to delineate TPH into equivalent carbon number fractions based on fate and transport considerations. Once the fractions were defined, fraction-specific values of relevant physical-chemical properties were calculated based on correlations to boiling point. The analytical method, fate and transport considerations and toxicity criteria (see vol. 4) are the technical elements which fit into a risk-based framework for determining human Heath Based Criteria at petroleum hydrocarbon contaminated sites.

Volume 4: Development of Fraction Specific Reference Doses (RfD's) and ReferenceConcentration (RfC's) for Total Petroleum Hydrocarbons

D.A.Edwards; M.D.Andriot, M.A.Amoruso; A.C.Tummey; C.J.Bevan; A.Tveit; L.A.Hayes; S.H.Youngren;  D.V.Nakles

US $19.95, Year 97, pp.137 ISBN 1-884-940-13-7 

To complete the risk-based approach, the Working Group has also selected toxicity criteria (e.g., Reference Doses) for each of the defined fate and transport fractions. The evaluation of the toxicology research database and rationale behind the toxicity criteria selected is described in detail in Volume 4.The group selected the American Society for testing And Materials (ASTM) Risk Based Corrective Action- RBCA framework as an example of how these elements can be used to calculate risk-based screening levels driven by non-cancer human health risk for petroleum contaminated sites.

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Volume 5: Human Health Risk-Based Evaluation of Petroleum Contaminated Sites: Implementation of the Working Group Approach

Donna Vorhees, John Gustafson and Wade Weisman

US $19.95, Year 99, pp.60 ISBN 1-884-940-12-9

Volume 5 is a guidance document to the TPH Working Group's Approach. It integrates the findings of Vols. 1-4 into a risk-based framework for development of cleanup goals at petroleum contaminated sites. In addition, the document includes descriptions of demonstration sites where the working group method has been used.

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