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EnviroGroup Limited   Vapor Intrusion News - December 2003
In This Issue:

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Jury returns verdict on Redfield Class Action

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AEHS Vapor Intrusion Workshop

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Massachusetts DEP Presentation on Revisions to MCP GW-2 Groundwater Standards

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Wisconsin Vapor Intrusion Fact Sheet

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California Draft Schools Risk Screening Guidance

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California DTSC Developing Vapor Intrusion Guidance

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Louisiana Issues Remediation Guidance

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AWMA Conference Will Include Vapor Intrusion Session



Featured Links:

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Vapor Intrusion Links

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Vapor Intrusion Publications

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EnviroGroup Vapor Intrusion Services
Jury returns verdict on Redfield Class Action
A Colorado State Court jury in Denver found Brown Group Retail, Inc. partially responsible for alleged environmental impacts on a neighborhood near the former Redfield Site, entering a verdict against Brown of $1,007,000 for non-economic damages. The jury did not award any punitive damages or damages for loss of property values. The plaintiffs had sought more than $380 million, including punitive damages.

The Redfield Site, one of the largest vapor intrusion sites in the country, is also one of the original vapor intrusion sites that led to the current EPA focus on this pathway. EnviroGroup has been the principal consultant for Brown Group since the off-site plume was discovered in 1998. More information on the site and the lawsuit (under New Information) can be found at the following link:
 
Redfield Website


AEHS Vapor Intrusion Workshop
The AEHS is holding an EPA-sponsored workshop on "A Study of Observed Vapor Intrusion Attenuation" at its 14th Annual West Coast Conference on Soils, Sediments and Water in San Diego, March 14-18, 2004. EPA is inviting abstracts for presentations on observed attenuation factors between groundwater and indoor air, and soil vapor and indoor air, as wells as papers on investigation techniques and approaches for dealing with background concentrations from other sources. More information on abstract submittal and the workshop can be found at the following link.

AEHS Call for Abstracts


Massachusetts DEP Presentation on Revisions to MCP GW-2 Groundwater Standards
A presentation on "Modeling the Vapor Intrusion Pathway: Revisions to the MCP GW-2 Groundwater Standards" can be found on the Massachusetts Department of Environmental Protection (DEP) website, providing a comprehensive summary of how DEP is addressing vapor intrusion, including a comparison to the EPA vapor intrusion guidance and other state standards, as well as a discussion of the Johnson Ettinger model and some of the recent controversy regarding its use. Click below to view or download the presentation.

Massachusetts DEP Presentation


Wisconsin Vapor Intrusion Fact Sheet
The Wisconsin Division of Public Health of the Department of Health and Family Services has developed a two page vapor intrusion fact sheet intended for the general public. It can be found at:

Wisconsin Fact Sheet


California Draft Schools Risk Screening Guidance
In October the Office of Health Hazard Evaluation of the California Environmental Protection Agency released the draft document: "Guidance for Assessing Exposures and Health Risks at Existing and Proposed School Sites". When finalized it is intended to be used by the Department of Toxic Substances Control and other state and local agencies to assess exposures and health risks at existing and proposed school sites, including evaluation of the vapor intrusion pathway. The guidance can be found at:

OEHHA Schools Risk Screening Guidance


California DTSC Developing Vapor Intrusion Guidance
In presentations made at the recent GRA Symposium on Vapor Intrusion (see September edition of VI newsletter at www.envirogroup.com), DTSC is developing California specific vapor intrusion guidance and is targeting January 2004 for its release. The guidance will reportedly recommend a tiered process, beginning with groundwater and soil gas measurements, including the use of the Johnson Ettinger model, culminating with indoor air measurements if necessary. The evaluation involves both current and future land use and risk. The approach proposed emphasizes site specific evaluation; screening values for soil gas and ground water will not be included. Vapor Intrusion News will announce the guidance when made available by DTSC.
 

DTSC Website


Louisiana Issues Remediation Guidance
The Remediation Services Division of the Louisiana Department of Environmental Quality has issued its Risk Evaluation/Corrective Action Program (RECAP) guidance document and regulation. The regulation became final October 20, 2003 and it includes minimum remediation standards for present and past uncontrolled constituent releases. The guidance document includes direction on indoor air sampling and details of how to evaluate volatile emissions from both soil and ground water to enclosed structures. The guidance document can be found at:

Louisiana remediation guidance document


AWMA Conference Will Include Vapor Intrusion Session
The Air and Waste Management Association will include a session on "Advances in Indoor Air Vapor Intrusion: Guidance and Application" at it Annual Conference and Exhibition to be held June 22-25, 2004 in Indianapolis, Indiana. For more information on the conference, click on the link below.
 

Air and Waste Management Association

 

This newsletter is issued periodically to provide our readers with information on new regulatory and technical developments in the rapidly changing field of vapor intrusion. While every effort is made to ensure that the information and links presented in this newsletter are accurate at the time of publication, they are presented for general information purposes only. Users should independently verify the accuracy and applicability of this information and seek professional advice for any specific sites or purposes. Articles on or links to any document or website do not imply endorsement of that document or website by EnviroGroup. Copyright EnviroGroup Limited 2003.

Please contact us if you have any questions about the topics presented in this newsletter, or vapor intrusion in general. More information about EnviroGroup Limited, including several useful links to vapor intrusion websites, is available at:
 EnviroGroup Limited
5670 Greenwood Plaza Blvd, Suite 540 | Greenwood Village, CO 80111 | 303-790-1340
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