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Re: Aqueous Cleaners & P2 Review


Status of South Coast Air Quality Management District's Rule 1171
I just spoke to Lou Yuhas (909) 396-2475, the program manager for
implementation of Rule 1171 (not 1122) at South Coast AQMD. There is no
follow-up report, but Lou states that his inspectors are finding an 85%
compliance rate by shops. Incidentally, when the rule first took effect
1/1/99 the VOC content of parts cleaners was limited to 50 g/l (5%).
They predicted that would reduce total VOC emissions in the LA basin
from 40,000 parts cleaners by 20 tons per day - the equivalent VOC
emissions from two medium-sized refineries. Beginning 1/1/03, the VOC
content must be 25 g/l or less. They predict an additional 1.9 tons per
day VOC reduction from this lower limit. I had heard a rumor that shops
were dissatisfied with aqueous cleaners and so were using more cans of
spray-on solvent aerosol cleaners to clean parts. Lou stated that that
is not the case. His inspectors also enforce the California statewide
ban on 3 chlorinated solvents in spray-on products (MeCl, PERC and TCE)
so they inspect aerosol can use. They haven't collected data to confirm
it, but they have seen no increase in aerosol can use to make up for
shops having lost the use of solvents in parts cleaning operations. Lou
states that 85% of LA area shops have successfully made the switch to
aqueous cleaners and are content with them.

Studies and Fact Sheets on Aqueous Parts Cleaners in used in Vehicle
I am not surprised at the success of this program, based on the aqueous
cleaning studies funded by our office, SCAQMD, Southern California
Edison, and the cities of LA and San Francisco. See:
www.P2pays.org/ref/03/02197.pdf; http://www.p2pays.org/ref/12/11109.pdf.
EPA Region 9 summarized the results of all four of these studies in our
two fact sheets entitled "Case Studies in Aqueous Parts Cleaning". See
http://www.epa.gov/region09/p2/autofleet, click on "Fact Sheets on P2
for Auto Repair" and "Fact Sheets on P2 for Fleet Maintenance". Each
sector has a different "Case Studies in Aqueous Parts Cleaning" fact
sheet summarizing study results from auto repair and fleet operations,
respectively. Aqueous Cleaning can work tremendously well if the shop
chooses the right equipment and solution. N.B. We always encourage shops
to test units/solutions first. We also encourage them to start with a
mix of the units/solutions which are featured in the case study fact
sheets. That's because the units/solutions featured in the fact sheets
emerged as best choices in the studies referenced. Each study tested
many units/solutions. Several units/solutions tested did not work well,
but the ones featured in our fact sheets worked extremely well, and
saved the operations lots of money!!!

It is estimated that there are 600,000 auto repair shops in the U.S.
Imagine if we got all shops to switch to aqueous, reducing nationwide
VOC emissions by an amount equivalent to 40 medium-sized refineries.

Studies and Fact Sheets on Aqueous Brake Cleaners in used in Vehicle
I also want to draw your attention to a study on water-based parts
washers - alternatives to spray-on aerosol brake cleaners:
http://home.earthlink.net/~irta/rprt0002.htm. These units represent
another slam dunk P2 fix with great environmental benefits. The amount
of air toxics emitted from an average-sized auto repair shop in
California, due to use of chlorinated aerosol spray-on products, created
a cancer risk to persons living near shops (not including the mechanics
who use them all day) that was high enough to compel the California Air
Resources Board to ban MeCl, PERC, and TCE use in automotive spray-on
products: http://www.arb.ca.gov/toxics/atcm/amratcm.htm. Again, the
Region 9 website listed above has a fact sheet on Aqueous Brake Washers.

Take Home Message
I hope all P2 providers feel really comfortable promoting the use of
these two aqueous cleaning alternatives. Given the ubiquity, emission
levels, and toxicity of their solvent counterparts, the environmental
and human health benefits of switching to aqueous cleaning solutions in
vehicle repair operations are huge. The cost savings to businesses by
switching are also large, based on the empirical data from the studies
referenced above. Final note: the only remaining needs we've seen for
solvents in vehicle repair are for cleaning electronic parts (e.g.
solenoid), cleaning brakes where a brake line has leaked or burst,
cleaning the carb and fuel injection components, for lubricating parts,
and for parts that are on the vehicle and inaccessible to a roll-around
water-based brake cleaning unit. Chlorinated solvents should not be
needed at all. We are funding a study to find an aqueous or low tox
(e.g. acetone, soy-based) cleaning solution to put in an aerosol can
that can meet some of these aerosol solvent cleaning needs.


Leif Magnuson
Pollution Prevention Coordinator
U.S. EPA Region IX, WST-7
75 Hawthorne St.
San Francisco, CA  94105
(415) 972-3286 Tel
(415) 947-3530 Fax

David's original message:

                      David Herb                                                                              
                      <herbdw@michigan.        To:       p2tech@great-lakes.net                               
                      gov>                     cc:                                                            
                      Sent by:                 Subject:  Aqueous Cleaners & P2 Review                         
                      10/22/2002 01:00                                                                        
                      Please respond to                                                                       
                      David Herb                                                                              

Dear P2 Techers,

Three requests for information:

Has there been any follow-up study to determine how affected auto
repair facilities have complied with Southern California's South Coast
Air Quality Management District Rule 1122?  IRTA
[http://home.earthlink.net/~irta/ ] and the California Department of
Toxic Substances Control
[http://www.dtsc.ca.gov/PollutionPrevention/index.html ] have made
available a number of good publications on the conversion to water based
cleaners, and the Clean Air Solvent Certification Program has made
available a "List of Certified CAS Products and Companies"
[http://www.aqmd.gov/tao/cas/prolist.html ].  However, I have not
come across a true following study.

Does anyone know if (PetroSolv) Nature's Way Marine Clean Solution
described in the Vehicle Maintenance Alternative Technologies
Demonstrations and Evaluation study
[http://es.epa.gov/program/p2dept/postal/vmfat1.html ] is still

Is there available an online index of articles for the journal
Pollution Prevention Review?

Thanks in advance,

David Herb
Environmental Engineer
Pollution Prevention Program
Constitution Hall
1st Floor, North Tower
525 West Allegan
P.O. Box 30457
Lansing, MI 48909-7957

Phone: 517-241-8176
Fax: 517-241-7966
Email: herbdw@michigan.gov

10th Annual Great Lakes Region Waste Reduction & Energy Efficiency
Workshop and Expo
November 20, 2002

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