From: Rick Baker

To: Elizabeth Sabol

CC: Deborah Bartram; Rick Baker

Date: 9/14/2011 2:36 PM Subject: Re: Fuel/Emission Factors for Dump Trucks
Attachments: DumpTrk_tb1.xls; DmpTrk.in

Hi Liz:

Here you go. Note that since dump trucks are regis tered for on-road use, we use MOBILE instead of NON ROAD for the emission factors, regardless of where/how the trucks are use d.

1) MOBILE doesn't estimate fuel consumption at idl e, but as per EPA guidance, idle performance is app roximated by assuming 2.5 mph operation. A Class 8a diesel truck (includes d ump trucks) operating at 2.5 mph gets 6.6 mpg, acco rding to MOBILE6.2. Dividing gives 0.38 gal/hr, which you can use for y our idle fuel consumption estimate.

2) Emission factors for CH4 and N2O for heavy-duty diesel trucks are 0.06 g/mi and 0.05 g/mi, respect ively. MOBILE doesn't provide these, so I took them from the California C limate Action Registry, General Reporting Protocol, v2.2, March 2007, Table C4 (for 1996 and newer diesel trucks).

3) Emission factors from MOBILE6.2 are as follows:

NOx = 0.614 g/mi (highway); 05.92 g/mi (local/offro ad)

CO2 = 1542.4 g/mi (both)

SO2 = 0.0144 g.mi (both).

Key MOBILE6.2 input assumptions include 2010 calend ar year, 2010 model year, and ultra-low sulfur dies el fuel used. I've attached the MOBILE6 input and output files for you r reference.

Just let me know if you need anything else.

Rick

Rick Baker

Senior Scientist Eastern Research Group, Inc.

3508 Far West Blvd #210 Austin, TX 78731 ph: (512) 407-1823 fax:(512) 419-0089 rick.baker@erg.com>>> Elizabeth Sabol 9/12/2011 1:0 1 PM >>> We are looking to have factors for both highways (o ff-site landfills, MOBILE6 model) and off-road (on- site landfills, NONROAD 2005) by Thursday or Friday of this week.

Please let me know if you need any other informatio n.

Thanks,

Liz

Elizabeth A. Sabol Environmental Engineer Eastern Research Group, Inc. 14555 Avion Parkway, Suite 200 Chantilly, VA 20151 elizabeth.sabol@erg.com
Phone:703-633-1659 >>> Rick Baker 9/12/2011 1:43 PM >>> those are all available from MOBILE, but N2O and CH 4 aren't in NONROAD outputs (I don't think - I'll d ouble-check). Regardless,
CH4 should be VERY low for diesel trucks.

We could probably do this in two hours or less. Wh en do you need it?Rick

Rick Baker

Senior Scientist Eastern Research Group, Inc.

3508 Far West Blvd #210 Austin, TX 78731 ph: (512) 407-1823 fax:(512) 419-0089 rick.baker@erg.com>>> Elizabeth Sabol 9/12/2011 11: 59 AM >>> Rick,

We are looking to evaluate criteria and green house gas emissions. The pollutants we've selected are: NOx, SO2, CO2, N2O, and CH4. However, if you are aware of any others you th ink we should be looking at, please let us know!

Thanks,

Liz

>>> Rick Baker 9/12/2011 12:42 PM >>> ok, that's a pretty clean engine.

we can pull some info together for you pretty easil y. What pollutants are you interested in?

Rick Baker

Senior Scientist Eastern Research Group, Inc.

3508 Far West Blvd #210 Austin, TX 78731 ph: (512) 407-1823 fax:(512) 419-0089 rick.baker@erg.com>>> Elizabeth Sabol 9/12/2011 11: 40 AM >>> Rick,

The year we are using for the model is 2010.

Thanks,

Liz

>>> Rick Baker 9/12/2011 12:15 PM >>>

Hi Elizabeth.

Do you happen to know the model year of the dump tr uck? That makes a big difference in emission rates

.

Rick

Rick Baker

Senior Scientist Eastern Research Group, Inc.
3508 Far West Blvd #210 Austin, TX 78731 ph: (512) 407-1823 fax:(512) 419-0089 rick.baker@erg.com>>> Elizabeth Sabol 9/12/2011 10: 44 AM >>> Rick,

We are currently working on ways to estimate fuel c onsumption and emissions related to the transportat ion of sludge and/or ash from steam electric power plants. Our model evaluat es a diesel dump truck that transports ash or sludg e to an off-site or on-site
landfill.We have a fuel consumption (gallon/mile) for the d ump truck; however, we are looking for the fuel con sumption of a dump truck

at idle. Are you aware of a quick estimate/rule of thumb for determining the idling fuel consumption? Or do you know where I could

search to find this value?

We are also looking to evaluate air emissions for t he dump truck based on the MOBILE6 and NONROAD 2005 models. As of now, we are estimating that we would use the MOBILE6 mod el to estimate emissions for dump trucks that trans port wastes to an off-site landfill (20 miles away) and the NONROAD model to e stimate emissions for dump trucks that transport wa stes to an on-site landfill (1.3 miles away). Are you aware of any universal fa ctors/inputs that we could use to get a typical emi ssion factor from the MOBILE6 model for a dump truck transporting solids wastes via highway? In addition, a similar approach to get a typical emission factor for a dump truck in the NONROAD model?

Thank you for your time in advance. I appreciate an y information you may have on the topics above. If you need a charge number, please use the following: 07012.08.029.044. Also, i f you could please let me know the number of hours you'll need for tracking

purposes.

Thanks,
Elizabeth

Elizabeth A. Sabol Environmental Engineer Eastern Research Group, Inc. 14555 Avion Parkway, Suite 200 Chantilly, VA 20151 elizabeth.sabol@erg.com
Phone:703-633-1659