EPA-HQ-OAR-2008-0708-DRAFT-0303[1]

----- Forwarded by Melanie King/RTP/USEPA/US on 12/07/2009 02:11 PM

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 |"Suchecki, Joe" <JSuchecki@ngelaw.com> 

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 |Melanie King/RTP/USEPA/US@EPA 

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 |12/07/2009 12:20 PM 

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 |RE: EMA Recommendation on Reducing Crankcase Blow-by emissions 

 

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Melanie,

It is really a combination of all the items you mentioned. First, technically 

one can certainly set up a sampling scheme to measure metals in exhaust or 

blow-by, but the accepted and approved engine method is generally completed 

under laboratory dynamometer conditions and requires the use of a dilution 

tunnel. Since virtually all older and in-use engines do not vent the crankcase 

to the exhaust, if you want to measure both exhaust and crankcase emissions, 

you would have to sample the exhaust and the blow-by separately or devise a 

system to vent the blow-by to the exhaust during sampling.

Second, the sampling and analysis scheme that is needed to determine metallic 

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HAP content is very expensive. Essentially you have to collect the metal 

samples from the exhaust on filters and then have the filters analyzed in 

laboratories that have the appropriate analysis equipment.

Analysis methods include using extraction techniques and ICP/MS or ED

XRF analysis . Although I do not have specific information, these

methods are relatively expensive compared to normal criteria pollutant 

sampling.

Third, the above methods are necessary in order to achieve the needed 

detection limits for the levels of metals emitted from engines. The amount of 

metallic emissions produced is very low, and so sampling times are long and 

methods with very low detection limits must be used.

Depending on the engine, individual metal concentrations are likely on the 

order of 10-3 to 10-7 g/bhp-hr. Such very low limits require expensive 

sampling and analytical methods to obtain reliable and acceptable results.

Measurement of metals from in-use engines in the field is problematic and 

expensive due to the methods involved, expense in extracting and analyzing for 

the large number of potential metallic HAPs, and the low levels of metals 

normally emitted. We believe it would be impractical and cost prohibitive to 

require the many thousands of owners/operators to complete metals testing for 

all of the in-use stationary diesel engines in the country.

I'm attaching a recent paper that looked at emissions from a 2004 and

2007 engine that includes metals. Jamie Schauer at University of Wisconsin 

would be a good person to contact about testing methods and costs for metals 

in engines.

Joe Suchecki

Director, Public Affairs

Engine Manufacturers Association

Two North LaSalle Street, Suite 1700

Chicago, IL 60602

Tel: 312-827-8734

Fax: 312-827-8737

jsuchecki@emamail.org

www.enginemanufacturers.org

Confidentiality Notice: This communication is confidential and may contain 

privileged information. If you have received it in error, please notify the 

sender by reply e-mail and immediately delete it and any attachments without 

copying or further transmitting the same.

All attachments are MS Office XP and are MIME encoded. If you have any 

software compatibility issues, please contact EMA at (312) 827-8700 

immediately.

-----Original Message-----

From: King.Melanie@epamail.epa.gov [mailto:King.Melanie@epamail.epa.gov]

Sent: Monday, December 07, 2009 9:31 AM

To: Suchecki, Joe

Subject: RE: EMA Recommendation on Reducing Crankcase Blow-by emissions

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Thanks Joe. Can you elaborate on why it isn't feasible to measure the 

emissions - for example is it because they aren't all emitted from the engine 

exhaust pipe, or because the test method is difficult and/or expensive to 

perform, or the emissions are so low that they might be below detection limit?

Melanie King

Energy Strategies Group

Sector Policies and Programs Division

Office of Air Quality Planning and Standards U.S. Environmental Protection 

Agency

Mail Code D243-01

RTP, NC 27711

Phone: (919) 541-2469

Fax: (919) 541-5450

king.melanie@epa.gov

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 |"Suchecki, Joe" <JSuchecki@ngelaw.com>

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 |Melanie King/RTP/USEPA/US@EPA

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 |12/07/2009 10:27 AM

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 |RE: EMA Recommendation on Reducing Crankcase Blow-by emissions

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We talked about that, and there is no simple way to measure the metallic 

emissions. It would be difficult and expensive to get quantitative data on 

the metallic HAPs. That is why we made the statements that reducing the 

amount of oil will also reduce the metallic HAP emissions - so that the oil 

mist can essentially serve as a surrogate for metallic HAPS.

The 60-80 percent removal efficiency for oil would result is a similar or 

larger reduction in metallic HAPS from the blow-by emissions.

We do not think it is economically feasible to require owners and operators to 

measure metal emissions from existing engines in the field.

Joe

Joe Suchecki

Director, Public Affairs

Engine Manufacturers Association

Two North LaSalle Street, Suite 1700

Chicago, IL 60602

Tel: 312-827-8734

Fax: 312-827-8737

jsuchecki@emamail.org

www.enginemanufacturers.org

Confidentiality Notice: This communication is confidential and may contain 

privileged information. If you have received it in error, please notify the 

sender by reply e-mail and immediately delete it and any attachments without 

copying or further transmitting the same.

All attachments are MS Office XP and are MIME encoded. If you have any 

software compatibility issues, please contact EMA at (312) 827-8700 

immediately.

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-----Original Message-----

From: King.Melanie@epamail.epa.gov [mailto:King.Melanie@epamail.epa.gov]

Sent: Monday, December 07, 2009 9:18 AM

To: Suchecki, Joe

Subject: Re: EMA Recommendation on Reducing Crankcase Blow-by emissions

Hi Joe,

Thanks so much for your letter, we really appreciate your quick response to 

our questions on this issue. One of the things that we talked about was the 

difficulty in measuring the metallic HAP emissions - I didn't see any mention 

of that issue in your letter, so I wanted to check and see if you had any 

comment on that issue.

Melanie King

Energy Strategies Group

Sector Policies and Programs Division

Office of Air Quality Planning and Standards U.S. Environmental Protection 

Agency

Mail Code D243-01

RTP, NC 27711

Phone: (919) 541-2469

Fax: (919) 541-5450

king.melanie@epa.gov

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 |"Suchecki, Joe" <JSuchecki@ngelaw.com>

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 |Melanie King/RTP/USEPA/US@EPA

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 |12/04/2009 04:01 PM

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 |EMA Recommendation on Reducing Crankcase Blow-by emissions

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TO: Melanie King

 US EPA

FROM: Joe Suchecki

 EMA

DATE: December 4, 2009

RE: Reducing Crankcase Blowdown Emissions from Existing CI

Stationary Engines

 Per your request during our recent teleconference, EMA is submitting the 

attached letter with information and a recommendation regarding the reduction 

of crankcase blow-by emissions form existing stationary CI engines.

 Please do not hesitate to call me if you have additional questions.

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Joe Suchecki

Director, Public Affairs

Engine Manufacturers Association

Two North LaSalle Street, Suite 1700

Chicago, IL 60602

Tel: 312-827-8734

Fax: 312-827-8737

jsuchecki@emamail.org

www.enginemanufacturers.org

Confidentiality Notice: This communication is confidential and may contain 

privileged information. If you have received it in error, please notify the 

sender by reply e-mail and immediately delete it and any attachments without 

copying or further transmitting the same.

All attachments are MS Office XP and are MIME encoded. If you have any 

software compatibility issues, please contact EMA at (312) 827-8700 

immediately.

 [attachment

"EMADOCS-#36897-v1-EPA_Crankcase_Emissions_Letter_12-09.pdf" deleted by 

Melanie King/RTP/USEPA/US]

(See attached file: SAE 2009-01-1084A .pdf)

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