MEMORANDUM

TO:		Brian D’Amico, USEPA/OW/OST/EAD	

FROM:	Mary Willett, ERG

		Cortney Itle, ERG

DATE:	August 29, 2008

SUBJECT:	Meeting with Cryotech Representatives on September 18, 2007

On September 18, 2007 EPA and ERG met with a Cryotech Deicing Technology
representative to discuss the status of current Agency efforts on the
airport deicing operations effluent guideline development and to obtain
information from Cryotech concerning their deicing products.  Attendees
at the meeting included:

Brian D’Amico, EPA

Eric Strassler, EPA

Ashley Allen, EPA

Lemuel Walker, EPA

Mary Willett, ERG

Cortney Itle, ERG

Keith Johnson, Cryotech

Carl Muska, DuPont

The following topics were discussed:

Status of EPA Efforts

Mr. Eric Strassler provided an overview of current EPA efforts.  Work on
the current guideline effort started in late 2004 and EPA/ERG have been
conducting data collection efforts to date.  These efforts include
characterization sampling at the Minneapolis/St. Paul and Detroit
airports in the winter of 2005 and sampling of treatment performance at
the Albany, Pittsburgh, Denver, and Rockford airports during the winter
of 2006.  During 2005, EPA/ERG developed questionnaires to solicit
information from both the airports and the airlines.  The airport
detailed questionnaires and the airline screener questionnaires were
sent out in April of 2006.  The airline detailed questionnaire was sent
to a statistically derived sample set of airlines in March 2007.

Also during this timeframe, EPA conducted about 20 airport site visits
and has been collecting information on the technologies and practices
that are common to the airport deicing operations industry.  Mr.
Strassler also briefly discussed the development of pollutant loadings
and costing, national estimates, and regulatory options.

Currently, EPA has published a schedule to propose in June 2008 and to
take final action in December 2009.

The various stakeholders that EPA has been working with to date include;
airports, airlines, industry trade associations, vendors (including
recycle/recovery vendors), and environmental entities (NRDC).

Overview of Deicing Products by Cryotech

Mr. Keith Johnson provided a presentation on Cryotech deicing products. 
Mr. Carl Muska of DuPont provided information on the chemicals used in
Cryotech’s deicing formulations.  Some of the main topics/points made
during the presentation included the following:

Cryotech provides both airfield (50% U.S. market share) and aircraft
(15-20% U.S. market share) deicing products.  Cryotech formulates
deicing products from purchased glycol through a license with Kill
Frost. Cryotech also purchases Kill Frost’s Type I and Type IV add
packs.

Cryotech is currently looking at new chemistries to overcome industry
issues regarding environmental impacts and the effect of deicing
products on carbon brakes, metal compatibility, electrical conductivity,
and alkali silica reactions (ASR) in concrete. These include the
development of a deicing product containing a new additive for potassium
acetate called BIO-PDO™ used for aircraft deicing and a new product
called BX36 used for deicing airfields.  

BIO-PDO™ (1,3 Propanediol) is produced by a fermentation process using
cornstarch.  In addition to the direct application to aircraft deicing,
it is used in the production of the DuPont ™ Sorona® polymer for
clothing, carpet, resins packaging and as a Polyol for coatings,
elastomers, and stretch fibers.  BIO-PDO™ is an additive in
Cryotech’s Type I ADF formulation DF Sustain which does not contain
propylene glycol.

The advantages of BIO-PDO™ in ADF are:

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␃ༀ킄市킄愂$摧ᯌ&ༀbased deicing fluids;

·	Readily biodegradable;

·	Life cycle analysis:  29% less Greenhouse Gas Emissions (GHG) and 42%
less energy; and

·	Low toxicity.

BIO-PDO™.  He added that a new bio-glycerin is being tested, but
results are not encouraging.

 

Memorandum

30 July 2008

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