Transcript Introduction

Florida Department of
Environmental Protection
Mercury from Electric Utilities:
Monitoring and Emission Reductions
Greg DeAngelo & Tiffany Miesel
Florida DEP, Division of Air Resource Management
July 30, 2009
Outline and Introduction
• Update since our March workshop
• Interaction with cement industry
• Federal regulatory updates
• Inventory
• Testing and sampling
• Monitoring (Mark Calloway, Tekran Instruments)
July 30, 2009 | 2
Update on Department's Activities
• Feb 12—held informational workshop
http://www.dep.state.fl.us/air/permitting/construction/mercury_wkp.htm
• May 5 & 6—tested OUC Stanton, Units 1 & 2
• Stack testing; Method 30B, with speciated results
• Concurrent material sampling; coal, combustion
byproducts, scrubber sludge
• Analyzed by Department's lab
• June 22—met with FCG mercury task force
• Status of the project, mercury (Hg) test data, Hg
emission estimates, additional data needs
July 30, 2009 | 3
Other Department Activities
• Added data from 2007 TRI, May FCG letter
• Provided inventory to DEP staff working on
TMDL standard for Hg
• Current (2008) emissions
• Emissions with controls to be installed in 2009
• Tracked federal rulemaking developments
• MACT proposals and activity for utilities, cement
• Examined non-utility coal use and utility non-coal
generation
• Followed Tampa Electric fly ash reinjection testing
July 30, 2009 | 4
Interaction with Cement Industry
• March—DEP met with FDOT and cement experts at the
FDOT research center in Gainesville.
• Summarized emissions from cement kilns in the U.S.
• Outlined likely range of future EPA limits, control options
• Discussed concept of filter dust shuttling to ultimately encase
some Hg in cement/concrete
• Agreed to support demonstration efforts by testing cement for
compliance with FDOT physical/chemical specifications
• DEP's expert consultant has found that substitution of
small amounts of filter dust for clinker:
• Reduces air emissions, and
• Will not disqualify the product as a Type I/II or masonry cement.
• National associations are moving toward dust shuttling.
• DEP is looking for participants interested in testing.
• Contact at DEP is Al Linero.
July 30, 2009 | 5
Federal Rulemaking (Cement MACT)
• May 6, 2009—EPA proposed revisions
• Tighter Hg standard, on a 30-day rolling average basis
• Compliance through continuous Hg measurement
• CEMS (PS–12A) or sorbent trap monitors (PS–12B)
• Performance specifications for ongoing quality assurance
• "[Could] apply to sources from categories other
than…cement"
• No restriction on types of utility boiler fly ash that
cement kilns can use
• June 9, 2009—EPA extended the comment period
• Three public hearings in June
• Comments due Sept 4, 2009
July 30, 2009 | 6
Federal Rulemaking (Utility MACT)
• In response to having CAMR vacated, EPA will propose a MACT
rule for utilities.
• Negotiations with litigants to settle the rulemaking schedule continue.
• EPA believes they are very close to settling that schedule.
• EPA plans to move "as quickly as [their] understanding of the issues
allows."
• EPA may have a final rule as early as Summer 2011.
• EPA is not reconsidering their previously proposed MACT.
• EPA will now (re-)evaluate all HAP (metals, acid gases, organics)
• 114 information collection request (ICR) letters will be necessary and are
under development.
• Will EPA require stack tests to get the baseline data they will need?
• EPA is soliciting comments on the proposed ICR.
• Review of the ICR was noticed in Federal Register on July 2, 2009.
• Comments are due August 31.
July 30, 2009 | 7
Mercury Reductions with CAIR Controls
Total Annual Utility Hg (lbs)
2000
1843
1800
1600
1469
1400
1200
1000
824
800
631
600
400
200
0
Current
2009
2013
2020
July 30, 2009 | 8
Hg Testing Results—Percent Removal
Hg (lbs/hr)
In (via coal)
Emitted from stack
Removal
Unit 1
(ESP + FGD)
Unit 2
(SCR + ESP + FGD)
0.030
0.039
0.00751
0.00198
75%
95%
July 30, 2009 | 9
Hg Testing Results—MACT Comparison
Previously proposed
lbs x 10-6/MWh
MACT standard
(lbs x 10-6/MWh)
lbs/hr
MW
Unit 1
(ESP + FGD)
0.00751
446
16.8
21
(existing sources)
Unit 2
(SCR + ESP +
FGD)
0.00198
440
4.50
6
(new sources)
July 30, 2009 | 10