Presentation is loading. Please wait.

Presentation is loading. Please wait.

FEDERAL LAND MANAGERS CLASS I AIR QUALITY ANALYSES.

Similar presentations


Presentation on theme: "FEDERAL LAND MANAGERS CLASS I AIR QUALITY ANALYSES."— Presentation transcript:

1 FEDERAL LAND MANAGERS CLASS I AIR QUALITY ANALYSES

2 TOPICS Major Source Permits Permitting Issues CALMET Issues CALPUFF POSTUTIL CALPOST Visibility Calculations

3

4 Coal Fired Power plants Latest count is >100 coal fired power plant applications nationwide NPS has > 17 applications in house –Most near 4 Corners area and SHEN FWS has 4 applications in house USFS numbers similar NPS

5

6

7 NEW COAL POWER PLANTS NEAR NPS/FWS AREAS KY 4-current GA 1-current IL 1-near future; 1- recent past WV-1 current; 2- recent past PA-3 current NV 2-near future ND 2-current WY 1-current UT 1-current; 2 near future; 2 recent past MT 2 near future NM-2 current CO-2/3 current

8 Other Projects 4 CORNERS CUMULATIVE ANALYSIS BRENTON ISLAND SO 2 STUDY FLORIDA CLASS I SO 2 STUDY

9 PROCEDURES/LEGAL See attachment 40 CFR Sec New source review. (a) For purposes of new source review of any new major stationary source or major modification that would be constructed in an area that is designated attainment or unclassified under section 107(d)(1)(D) or (E) of the Clean Air Act, the State plan must, in any review under Sec with respect to visibility protection and analyses, provide for: (1) Written notification of all affected Federal Land Managers of any proposed new major stationary source or major modification that may affect visibility in any Federal Class I area. Such notification must be made in writing and include a copy of all information relevant to the permit application within 30 days of receipt of and at least 60 days prior to public hearing by the State on the application for permit to construct. Such notification must include an analysis of the anticipated impacts on visibility in any Federal Class I area, (2) Where the State requires or receives advance notification (e.g. early consultation with the source prior to submission of the application or notification of intent to monitor under Sec ) of a permit application of a source that may affect visibility the State must notify all affected Federal Land Managers within 30 days of such advance notification, and….

10 40 CFR Sec New source review FLMs need Relevant Information 60 days before public hearing: –Permit application –Draft Permit with emission limits; both short and long term limits –Staff analyses BACT, Modeling –Copy of Public Notice

11 CALMET METEOROLOGICAL DATA How many years of MM data –1 year is no longer allowed –3 years with MM data is acceptable –5 years with MM data in the future CALMET/MM prognostic data (MM4-1990, MM5-1992, MM5-1996)-available from NPS/FWS MM5 for 2002 available from VISTAS & CENRAP-not CALMET ready FWS creating MM5: 2001, 2000, 1999, 1998, 1997 –36*36km CALMET ready –Consistent with same data sets generated with same method FWS will create MM5: 2001, 2000, 1999, 1998, 1997 –12*12km CALMET ready –Consistent with same data sets generated with same method

12 METEOROLOGICAL DATA If MM5 is used then: The need to determine if CALMET wind field is representative. –Compare to NWS maps and data & wind rose –Use software (i.e.) (METEVAL)-PC or LAKES VIEW Product or PAVE-UNIX Refined CALPUFF should not use just MM data alone = (NOOBS) –not in lieu of no SFC or UA data –cannot use MM data precip field alone

13 New years of MM5 or RUC-2 RPO’s are evaluating the performance of new MM5 years with statistical programs (i.e.) METSTAT Rapid Update Cycle (RUC-2) –FLMs concern is RUC is a diagnostic analysis tool & needs performance evaluation against observations & MM5 –Parameters- Ws, Wd, RH, Precip, Vertical profile –Been applied in very limited situations (4) -usually when MMx data was not available or appropriate –Older RUC 40*40km –New RUC 20*20km Earth Tech and Wind Logic –WRF (to replace MM5) is now just a prognostic/forecast tool with no nudging with observations like current MM5; unknown when it will be ready for dispersion modeling

14 CALPUFF Guidance in IWAQM 2 & FLAG FIXED CLASS I Receptor Grids for all 156 areas CALMET grid (4km-1.5 & 1.0 km) CALMET & CALPUFF settings must stay fixed for the different years CALPUFF must be executed for run length----- not monthly For short term increments and visible haze, need to model short term w/State emission limits. Pounds per hour or Pounds per MMBtu, etc Annual increments and acid deposition can use annual TPY emission limits Annual deposition for total Sulfur & Nitrogen CALPUFF<50 km: if flow is complex

15 PM SPECIATION for VISIBILITY IMPACTS PM-coarse PM-fine Elemental Carbon Secondary Organic Aerosols Sulfuric Acid Mist Pulverized Coal boilers Circulating Fluidized Bed boilers Natural Gas Turbines Oil Fired Turbines

16 EMISSION SOURCES New Sources- same emissions for new facility as Class II analysis (usually not fugitives) Cumulative Class I increment analysis for pollutant & averaging time > EPA Class I SIL –All major/large sources up to 300 km from Class I area –Minor sources < 50km from Class I area-not same minor source inventory as Class II –Emissions=State’s permit limit for averaging time--usually short term limits

17 “Ammonia Limiting” NH 3 affects NO 3 concentrations SO 4 affects NH 3 concentrations –i.e. NH 3 preferentially reacts with SO 4 NH 3 DOES NOT affect SO 4 concentrations SO 4 assumed to be (NH 4 ) 2 SO 4 –Could be NH 4 HSO 4, H 2 SO 4, or (NH 4 ) 3 H(SO 4 ) 2 NH 3 + HNO 3  NH 4 NO 3 –NH 4 NO 3  f(RH,T)

18 POSTUTIL CALPUFF may overestimate the amount of NH 4 (NO 3 ) formed due to overlapping puffs Recommended to run to properly apportion the available background ammonia to the number of puffs in each grid cell. This post processing was also done so as not overestimate the amount of ammonium nitrate particles formed. The adjusted binary concentration output files are then applied in the CALPOST model to derive the visibility impacts. Set MNITRATE = 1

19 Effects on Visibility CALPOST-----INPUT GROUP: 2 Extinction Efficiency (1/Mm per ug/m**3) MODELED particulate species: PM COARSE (EEPMC) -- Default: 0.6 ! EEPMC = 0.6 ! PM FINE (EEPMF) -- Default: 1.0 ! EEPMF = 1.0 ! BACKGROUND particulate species: PM COARSE (EEPMCBK) -- Default: 0.6 ! EEPMCBK = 0.6 ! Other species: AMMONIUM SULFATE (EESO4) -- Default: 3.0 ! EESO4 = 3.0 ! AMMONIUM NITRATE (EENO3) -- Default: 3.0 ! EENO3 = 3.0 ! ORGANIC CARBON (EEOC) -- Default: 4.0 ! EEOC = 4.0 SOIL (EESOIL)-- Default: 1.0 ! EESOIL = 1.0 ! ELEMENTAL CARBON (EEEC) -- Default: 10. ! EEEC = 10.0 !

20 Background Extinction Computation Method used for background light extinction (MVISBK) -- Default: 6 ! MVISBK = 2 ! 1 = Supply single light extinction and hygroscopic fraction - IWAQM (1993) RH adjustment applied to hygroscopic background and modeled sulfate and nitrate 2 = Compute extinction from speciated PM measurements (A) - Hourly RH adjustment applied to observed and modeled sulfate and nitrate - RH factor is capped at RHMAX 3 = Compute extinction from speciated PM measurements (B) - Hourly RH adjustment applied to observed and modeled sulfate and nitrate - Receptor-hour excluded if RH>RHMAX - Receptor-day excluded if fewer than 6 valid receptor-hours 4 = Read hourly transmissometer background extinction measurements - Hourly RH adjustment applied to modeled sulfate and nitrate - Hour excluded if measurement invalid (missing, interference, or large RH) - Receptor-hour excluded if RH>RHMAX - Receptor-day excluded if fewer than 6 valid receptor-hours 5 = Read hourly nephelometer background extinction measurements - Rayleigh extinction value (BEXTRAY) added to measurement - Hourly RH adjustment applied to modeled sulfate and nitrate - Hour excluded if measurement invalid (missing, interference, or large RH) - Receptor-hour excluded if RH>RHMAX - Receptor-day excluded if fewer than 6 valid receptor-hours 6 = Compute extinction from speciated PM measurements - FLAG RH adjustment factor applied to observed and modeled sulfate and nitrate 7 = Compute extinction from speciated PM measurements as in [2] for 'unobstructed' conditions; replace with extinction from observed visual range for fog/precipitation conditions - Hourly RH adjustment applied to observed and modeled sulfate and nitrate - RH factor is capped at RHMAX - When fog/precip is observed, replace computed Bext with: Bext(1/Mm) = 3912/VR(km)

21 FLM INFORMATION AVAILABLE AT: html sions_ControlTech.htm ors/index.htm


Download ppt "FEDERAL LAND MANAGERS CLASS I AIR QUALITY ANALYSES."

Similar presentations


Ads by Google