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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">See info below regarding asphalt shingles recycling report…<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> JTRProfessionalRecyclersNetwork@yahoogroups.com
<br>
<b>Sent:</b> Wednesday, July 31, 2013 6:57 AM<br>
<br>
</span><b><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></b></p>
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<a name="toc"></a><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#222222">1
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<a name="1"></a><a href="http://groups.yahoo.com/group/JTRProfessionalRecyclersNetwork/message/1570;_ylc=X3oDMTJyZTY4c3V0BF9TAzk3MzU5NzE1BGdycElkAzIyNzkwMTAxBGdycHNwSWQDMTcwNTM3MjQ2OQRtc2dJZAMxNTcwBHNlYwNkbXNnBHNsawN2bXNnBHN0aW1lAzEzNzUyNzE3OTc-"><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#3353F3;text-decoration:none">EPA
Region 8 Life Cycle Assessment Based Study on Recycled Shingles </span></a><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></h2>
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<h4 style="margin:0in;margin-bottom:.0001pt;line-height:15.0pt"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:black;font-weight:normal">Tue Jul 30, 2013 8:03 am (PDT) . Posted by:
<o:p></o:p></span></h4>
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<span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#3353F3;font-weight:normal"><a href="mailto:giuranna.mike@epa.gov?subject=Re%3A%20EPA%20Region%208%20Life%20Cycle%20Assessment%20Based%20Study%20on%20Recycled%20Shingles%20"><span style="color:#3353F3;text-decoration:none">"Giuranna,
Mike" </span></a><o:p></o:p></span></h3>
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<p class="MsoNormal" style="margin-bottom:12.0pt;line-height:14.25pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#333333">FYI, EPA, Region 8 in Denver has completed a report on the recycling of asphalt shingles in road construction.
If anyone would like a copy of the full report, please send me an email @ <a href="mailto:Giuranna.mike%40epa.gov">
Giuranna.mike@epa.gov</a><mailto:<a href="mailto:Giuranna.mike%40epa.gov">Giuranna.mike@epa.gov</a>> and I'll send it to you.<br>
<br>
Mike Giuranna<br>
EPA, Region III (3LC40)<br>
1650 Arch Street<br>
Philadelphia, PA 19103-2029<br>
215-814-3298(B) 215-814- 3114 email:<a href="mailto:giuranna.mike%40epa.gov">giuranna.mike@epa.gov</a><br>
<br>
Subject: EPA Region 8 Life Cycle Assessment Based Study on Recycled Shingles - Final Report<br>
<br>
Dear colleagues,<br>
<br>
It is with great pleasure that EPA Region 8 is providing you with a final report that takes a first look, using a more holistic approach, at the use of recycled materials in the road construction industry in Region 8.<br>
<br>
The study was commenced a few years ago to support the ongoing efforts to establish a shingle recycling market infrastructure in Colorado, and more broadly, the region. The goal of the assessment was to compare limited environmental inventory and impacts of
seven (7) asphalt mixes with various percentages of reclaimed asphalt and recycled shingles to a baseline of virgin asphalt. The study, Analysis of Recycling of Asphalt Shingles in Pavement Mixes from a Life Cycle Perspective, therefore, is only an initial,
limited life cycle inventory and impact assessment. The study examines avoided landfill impacts, greenhouse gas emissions/global warming potential, and criteria and other air pollutants on a cradle-to-gate basis. Energy consumption and resource depletion are
considered only for select stages in the life cycle. The study was developed using regional characterization factors, where possible, such as mix designs, and distances to obtain materials and to transport pavement to the construction site.<br>
<br>
The key conclusions from the study include the following. Please see the final report (attached) for additional information and details, including the scope and boundaries of the study which are very important for understanding the results, as well as recommendations
for potential areas for further research.<br>
<br>
* There are environmental benefits to the use of recycled asphalt shingles (RAS) in asphalt production for use in road construction.<br>
<br>
* The addition of RAS to pavement mixes that use reclaimed asphalt pavement (RAP) helps further increase environmental reductions relative to the baseline of using virgin asphalt.<br>
<br>
* When examining the life cycle greenhouse gas (GHG) emissions, or global warming potential, by mixture scenario, the greatest reductions come from the largest percentage inclusion of both RAP and RAS. For the pavement mixes of focus for this report, this is
the 20% RAP-7% RAS hot mix asphalt (HMA) mix which reduces GHG emissions by 47 lbs CO2e/short ton, or 29%, compared to the baseline virgin mix. This reduction amount includes a GHG credit for avoiding landfilling since the shingles are used in pavement and
not disposed.<br>
<br>
* For the two mixes containing RAS that meet the Colorado Department of Transportation's performance specification, 17% RAP-3% RAS and 5% RAS, 31.9 lbs CO2e/short ton and 14.2 lbs CO2e/short ton of GHG emissions are mitigated (with the landfill GHG credit),
respectively, when used instead of the virgin mix.<br>
<br>
* When examining the life cycle GHG emissions attributed to the various mix designs, there is a 3% reduction in GHGs when switching from the 20% RAP (HMA) to the warm mix asphalt WMA 20% RAP mix assuming a 30 mile final product transport distance. However,
when the feasible transport distance for the WMA is doubled from 30 miles to 60 miles, the WMA 20% RAP GHG emissions are 9% higher.<br>
<br>
* The petroleum refinery is the largest source of most criteria and other air emissions. Increasing the amount of recovered binder from the use of recycled materials can help to reduce those emissions.<br>
<br>
* Aggregate production is the primary particulate matter emission source, so increasing the use of recovered aggregate (both from RAP and RAS) can help reduce particulate emissions.<br>
<br>
* Transportation distances for aggregate to the asphalt plant and the heated asphalt to the job site are both highly sensitive variables that can have large impacts on the total life cycle emissions. Increasing the transportation distance for WMA from 30 to
60 miles raises the GHG emissions for transportation by 51% compared to the equivalent HMA case. The change is 19 lbs CO2e/short ton of asphalt, which is over 10% of the emissions considered in the study.<br>
<br>
* When examining only the energy consumed for the preparation and processing of RAP and the production of asphalt pavement at the plant, the use of 20% RAP with WMA provides an approximate 12% energy reduction compared to the use of 20% RAP with HMA. This results
in lower GHG emissions for that stage of the life cycle. The reduction can be more than offset, however, by the increased transportation distance possible with WMA.<br>
<br>
* Larger reductions in impacts are seen when RAP is included over solely using RAS. The addition of RAP reduces the amount of virgin aggregate required which must be transported over a longer distance.<br>
<br>
* Combining RAP and RAS diverts even larger volumes of material away from landfills, and these amounts are quantified in the study.<br>
<br>
Hard copies of the report will not be made available. However, the report will soon be posted on Region 8's industrial materials recycling web page at
<a href="http://www2.epa.gov/region8/industrial-materials-recycling">http://www2.epa.gov/region8/industrial-materials-recycling</a> and construction and demolition materials web page at
<a href="http://www2.epa.gov/region8/construction-and-demolition-materials.">http://www2.epa.gov/region8/construction-and-demolition-materials.</a> Please feel free to share this announcement and the report with your networks. I will be presenting information
about the study at the 6th Asphalt Shingle Recycling Forum, held by the Construction Demolition & Recycling Association and co-sponsored by the Federal Highway Administration, this November in Denver (<a href="http://www.shinglerecycling.org/content/shingle-forum-home">http://www.shinglerecycling.org/content/shingle-forum-home</a>).<br>
<br>
Please feel free to contact me should you have any questions.<br>
<br>
Kendra<br>
<br>
Note - The timeline for study development was not what I had hoped for. The challenges faced were a limited amount of funding that had to be distributed through time which resulted in incremental development of the study, in addition to a job reassignment last
October 2012.<br>
<br>
----------------------------------------------------------<br>
Kendra A. Morrison<br>
Environmental Scientist, MS, REHS/RS<br>
U.S. Environmental Protection Agency, Region 8<br>
Air and Radiation Program<br>
Air Permitting, Modeling, and Monitoring Unit<br>
Office: (303)312-6145 / Toll Free 1-800-227-8917 in CO, MT, ND, SD, UT, WY<o:p></o:p></span></p>
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