cdphe colorado greenhouse gas inventory update

7/30/2019 CDPHE Colorado Greenhouse Gas Inventory Update

1/16

COLORADO GREENHOUSE GAS

INVENTORY UPDATE PROJECT

CDPHE

Theresa Takushi

Jim Dileo

Steven ArnoldGarry Kaufman APCD Greenhouse Gas Inventory Update April 2013

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Goals

APCD Greenhouse Gas Inventory UpdateApr2013

2

Produce an updated, default inventory with 2020projection by March 2013

Produce a workbook for future inventories

Phased approach 5XQPRGHOLQIXOOGHIDXOWPRGHDQGHVWDEOLVKEDVHOLQH

Document results and put in context RI&8HYDOXDWLRQ

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Rerun modules with improvements and compare

Consider black carbon assessment


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1990 CAA Provides Direction


3

1993 EPA issues grants to States to

begin work on GHG inventories

1998 Colorado GHG report

completes the second phase of thegrant process

Electric Vehicle test program

implements third phase of grant Additional updates based via

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Accomplishments

APCD Greenhouse Gas Inventory Update

Apr2013

4

Three previous State inventories, plus updates Two in-KRXVHVXVLQJ(3$ZRUNERRN

approach, a 2000 update and a 2002 forecast

WGA/WRAP/CCS 2007 update using EPA SITmodel and other processes

Used 1990, 2000, 2005, 2010, 2020 Used EPA State Greenhouse Gas Inventory Tool (known

as SIT or SGIT) plus added processes

7ZR6WDWH)DFLOLWLHV*UHHQLQJ*RYHUQPHQWinventories completed

*RYHUQRUVH[HFXWLYHRUGHUUHTXLUHV\HDUupdates to whole state inventory

Current effort targeted to develop draft inMarch 2013 based on default mode SIT


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A r2013

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Many local governments havecreated their own GHG inventoriesin Colorado (Aspen/Pitkin County,Boulder, Denver, Ft. Collins, etc.)

Local inventories reflect varyinglevels of granularity depending onthe availability of local data

Local inventories produce ageographic patchwork of statewideemissions and do not all use thesame methodology


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WGA/WRAP/CCS


Apr2013

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Western *RYHUQRUV$VVRFLDWLRQFRQWUDFWHGZLWKWKHWestern Regional Air Partnership to produce a state-by-state western U.S. GHG inventory

WRAP subcontracted to

Center for Climate Strategiesto perform the work

Last inventory completed and

published 2007(On APCD Climate Change site

With older inventories and updates)


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Executive Order

APCD Greenhouse Gas Inventory Update Apr2013

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In April 22, 2008 Governor Ritter signed anH[HFXWLYHRUGHUUHTXLULQJ

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greenhouse gas emissions inventory, with the first updatescheduled to be completed no later than 2012 and

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The Update


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Past inventories for the State are all top down

Over 20 local municipalities in Colorado have

inventories, all bottom up Evaluation of the CCS inventory performed by CU

team:

Shortcomings identified

Changes in regulations and legislation changeassumptions from 2005 to 2020

Updated data change calculations


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Top Down Approach Adopted


Apr2013

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EPA released an update to the

State Inventory Tool (SIT)

(formerly State Greenhouse

Inventory Tool) -Fall 2012

Model has ten modules & projection

tool

Consideration given to using

Argonne Labs GREET model for transportation

Consideration given to use CSU Agricultural and Forest model EPA continues to update each module with new data base links and

improvement to calculations


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The EPA State Inventory Tool (SIT)-Pros


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Has 10 emissions modules

Has a projection module

Links major national data bases to calculation schemes

Has consistency with other states Follows the international GHG protocol the U.S. agreed

to follow for the national inventory

Allows for customization of emission factors and activity

assumptions Was updated by EPA in 2013 to improve the process

using latest assumptions


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2012 National Major Stationary

Source Inventory Improves Data


Apr2013

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SIT Model Cons


Apr2013

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One size fits all

Difficult to track down national data bases and

source of original information

Spreadsheets complex and appear to have some

data gaps

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National data bases often difficult to dissect todetermine validity of assumptions


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Black Carbon


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Current SIT does not address

EPA SPECIATE model used by CCS in the 2007inventory

Has multiple impacts in Colorado Fine particulate related to fire

Impacts on visibility in urban and regional haze

Impacts from new sources like natural gas flaring

Role and contribution not well understood Inventory process challenging

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Draft SIT Model Runs

1990-2030

(2013 Analysis)

(Million Metric Tons CO2e) 1990 1995 2000 2005 2010 2020 2030

Electrical Production 31 33 39 40 39 39 39

(RCI) Fuel Use 17 20 23 27 28 28 29

Transportation 20 24 27 31 30 36 40

Fossil Fuel Industry 6 5 10 11 12 15 15

Industrial Processes 1 2 4 5 5 6 8

Waste Management 1 1 1 2 3 3 3

Agriculture 8 8 9 9 8 8 7


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Status and Next Steps


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Status

State facilities inventory completed

Update of state inventory model runs and summary

completed December 2012 Draft report scheduled for May 2013

Next Steps

Finish documentation of default case

Run projection case Publish draft for review

Consider Colorado adjustments

cdphe colorado greenhouse gas inventory update

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