2003 CPEO Military List Archive

From: CPEO Moderator <cpeo@cpeo.org>
Date: 25 Nov 2003 22:27:48 -0000
Reply: cpeo-military
Subject: [CPEO-MEF] Seminar Announcement: 1,4-dioxane in groundwater
Please excuse the cross-posting.

1,4-Dioxane and Other Solvent Stabilizers in the Environment

December 10, 2003 Doubletree Hotel, San Jose
Register Now at http://www.grac.org <http://www.grac.org/

Conference Program

8:00 AM  Exhibit Area open; Coffee
8:30 - 9:00  Registration
9:00 - 9:10  Introductory Remarks Jim Carter, GRA President

9:10 - 10:00  1,4-dioxane and Other Solvent Stabilizers in the
Environment - Nature and Extent of Occurrence, Thomas K.G. Mohr, Santa
Clara Valley Water District, San Jose, CA

10:00 - 10:25  Survey of 1,4-Dioxane Occurrence at Solvent Release
Sites  in the San Francisco Bay Area Vince Christian, San Francisco Bay
Regional Water Quality Control Board, Oakland CA

10:25 - 10:45  BREAK
10:45 - 11:35  Case Study - The Pall - Gelman Sciences 1,4-dioxane
Plumes - History and Innovations in 1,4-dioxane Remediation  Farsad
Fatouhi, Vice President, Pall Corporation, Michigan Jim Brode, Fishbeck
Thompson Carr and Huber, Michigan

11:35 - 11:50  Case Study - Occurrence and Remediation of 1,4-dioxane at
the Stanford Linear Accelerator Site Dellilah Sabba, Environmental
Geologist, Stanford Linear Accelerator Center

11:50 - 1:00  LUNCH

1:00 - 1:25  An Updated Evaluation of the Carcinogenic Potential of
1,4-Dioxane Julie A. Stickney, Ph.D., Principal Scientist, ARCADIS
Portland, Maine.

1:25 - 1:50  Laboratory Methods for Analysis of 1,4-dioxane (Speaker to
be Announced)

1:50 - 2:15  Butane Biostimulation for In-Situ Remediation of
1,4-dioxaneFelix A. Perriello, President, Global BioSciences, Inc. N.
Attleborough, Massachussetts

2:15 - 2:40  Developing In Situ Reactive Zone Strategies for 1,4-Dioxane
 Frederick C. Payne, Ph.D. ARCADIS, Michigan (Speaker) Suthan S.
Suthersan, Ph.D., P.E. ARCADIS, Michigan Barry Molnaa, ARCADIS, Michigan
Scott Davis, P.E., ARCADIS, Michigan

2:40 - 3:05  In Well Air Stripping for 1,4-Dioxane Removal:Dynamic
Subsurface Circulation Technique Marco M. Odah, Ph.D., P.E., Accelerated
Remediation Technologies Olathe, Kansas

3:05 - 3:25  BREAK

3:25 - 3:50  Ozone-Peroxide Advanced Oxidation Water Treatment of
1,4-Dioxane and Chlorinated Solvents Reid H. Bowman, Ph.D., Chief
Technical Officer, Applied Process Technology, Inc., San Francisco,

3:50 - 4:15  Rethinking Traditional Approaches to HydraulicCapture in
Preparation for the Next Series of Emerging Chemicals of Concern in
Groundwater Neil Blandford Daniel B Stephens & Associates, Inc.,
Albuquerque, New Mexico

4:15 - 4:40  Legal Aspects of Emerging Contaminants and Moving Targets -
Responsible Party Perspective Brian Haughton, Esq., Coffin Barg Trapp
and Lewis, San Francisco

4:40 - 5:00  Roundtable Discussion - Managing The 'Contaminant du Jour
Syndrome' Discussion with Speakers and Audience Participation

Co-Sponsor: Applied Process Technology, Inc. <http://www.aptwater.com/

Refreshment Sponsor: Chemical Risk Sciences International

Agriculture & Priority Pollutants Laboratory, Inc.
<http://www.applinc.com/>  | Sequoia Analytical
<http://www.sequoialabs.com/>  | Zymax Envirotechnology

The widespread release of chlorinated solvents to groundwater from
vapor  degreasing operations have been investigated and remediated on
the basis of the primary solvent chemicals trichloroethylene,
1,1,1-trichloroethane, tetrachloroethylene, and carbon tetrachloride. At

many sites, the likely presence of 1,4-dioxane and other stabilizer
compounds have been largely overlooked. Recent testing has shown that
1,4-dioxane is found to be present at problematic
concentrations at many solvent sites. There are several implications to
the discovery of this highly mobile unregulated contaminant at cleanup
sites, including the need to revisit capture zones, monitoring networks,
and treatment technology selection.

What are solvent stabilizers? Numerous additives are routinely included
with most industrial solvents to ensure that the solvents perform as
needed in their intended degreasing application. These additives are
collectively known as solvent stabilizers, or inhibitors, and mitigate
or prevent reactions with water, acids, and metals, and inhibit
degradation from heat, light, and oxygen. Most of the several hundred
compounds identified as solvent stabilizer are volumetrically
insignificant, but a few are potentially problematic with respect to
their toxicity, persistence, volume, and potential to get concentrated
through partitioning in vapor degreasers and distillation in
solvent recycling operations.

Who should attend: The symposium is intended for regulatory agency
personnel, consultants, responsible parties, property owners and
developers interested in the occurrence, sources, analysis, toxicology,
regulation, and remediation of solvent stabilizer compounds.

This Symposium will focus on solvent stabilizers and 1,4-dioxane in
particular. Attendees will hear from speakers on the nature of
stabilizers, their behavior in the subsurface environment, analytical
issues for identification of stabilizers, the toxicology of 1,4-dioxane
and toxicity characteristics of other stabilizers that may pose
problems, and the significant challenges to remediating this

'We are now organizing speakers to illuminate the myriad issues
surrounding this extremely mobile compound. Plan on attending to learn
where 1,4-dioxane has been identified at dozens of solvent release sites
in California, with concentrations greater than 100 mg/L at some sites.
1,4-dioxane is a main driver of risk in the indoor air studies recently
conducted at Moffett Field - does it emanate from the underlying solvent
plume? Like the more familiar ether compound, MtBE, 1,4-dioxane is
generally considered not suitable for in situ biodegradation. How does
the discovery of 1,4-dioxane at solvent cleanup sites affect plans for
dealing with asymptotic tailing of pump and treat systems using
monitored natural attenuation or in situ bioremediation? Can stabilizers
be used to distinguish different sources of the same solvents used for
different purposes?

Registration Fees:

GRA Members, Government Agency Employees and Cooperating Agency
Employees - $185 per person; Non-GRA members - $235 per person;
Registration plus GRA membership - $255 per person; Students - $75 per
person. Visit http://www.grac.org <http://www.grac.org/  to register
for this event.

915 L St, Ste 1000 * Sacramento, CA 95814 * Ph 916-446-3626 * Fx

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