**MEMORANDUM**

**To:** Carbon Power Plan for Existing Power Plants; Docket id: OAR

- 2013
- 0602 **From:** Region 5, EPA **Subject:** 8/28/14, Conference Call Regarding Proposed Carbon Plan for Existing Power Plants **Summary** : A conference call was held between EPA and attendees from Michigan on August 28, 2014 to discuss the proposed Carbon Power Plan for Existing Power Plants. The following list of questions was submitted for discussion by the Michigan Department of Environmental Quality
. **Attendees may have included:** Bukowski, Breanna (DEQ); Hellwig, Vince (DEQ); Fiedler, David (DEQ); Kulesia, Steven (LARA); Evans, Nicholas (LARA); Brunner, Julie (DEQ); Newman, Erin (EPA) ; cain.alexis (EPA) ; Maupin, Mary (DEQ) [ mailto:MAUPI

NM@michigan.gov ] **Note:** The questions below includes the strike through of questions that were covered on the call.**QUESTIONS FOR EPA ON 111(D) PROPOSAL**

1. Please provide the exact calculation, including all corresponding data and assumptions, of the 2012 MI carbon Intensity ratio. It is important to understand how it is adjusted and how nuclear affects the target. 2. Michigan’s assigned natural gas rate of 810 lbs/MWh is not consistent with proposed 111(b) requ irements for new plants which are typ ically more efficient than existing plants. Please explain the basis for the assigned rate EPA used in the proposed rule. 3. It does not appear EPA’s calculation of coal plant efficiency savings includes the degradation of efficiency at coal plants when they are cycled up and down to accommodate greater use of natural gas combined cycle generation. If not, why not? The degradation is a fact that is cited in EPA’s own Technical Support Document “GHG Abatement Measures” pages 2
- 5. There EPA states: “Operating an EGU as a baseload unit is more efficient than operating an EGU as a load following unit to respond to fluctuations in customer electricity demand.” 4. How can we accommodate unanticipated load growth in a mass

- based s ys te m? Would mid

- term corrections be permissible? 5. How will EPA guarantee that heat rate improvements will not be considered subject to NSR permitting considering that the EPA and DOJ made the opposite argument in United States v. DTE Energy

Co., 711 F.3d 643, 644 (6th Cir. 2013) even though actual emissions did not increase? 6. For the state plan, do final legislation, final rules, and other enforceable measures have to be in place or can they

be proposed or draft requirements? 7. Is it accurate to describe that RE prior to 2014 will not be counted towards our CO2 reduction goal? 8. How will MI SO, which dispatches on a regional (not state

- by

- state) basis, be able to economicall y dispatch NGCC units over coal to the extent that Michigan maximizes the savings from buildin g block II ? 9. Can EPA provide a sample conversion of a rate

- based to a mass

- based goal that relies on a portfolio approach? 10. Would EPA consider an alternative to not meeting the interim goal, but meeting the final goal with reasonable further progress? 11. How do we determine/control dispatch of an y fossil

- fueled EGU when this is performed by the RTO (MI SO) under an economic market

- based s ys tem of dispatch? 12. Would EM&V have to be harmonized with other trading states if Michigan decides to take a multi

- state approach to meet 111(d)? 13. Please provide your rational for how heat rate improvements are going to be useful as part of the goal calculation in light of how to measure the improvements? Utility comments to us have indicated that current methods used to estimat e and report fuel heat input to EPA are not sufficiently precise to consistently

detect a heat rate improvement of 6% or less. We are also hearing that the 6% heat rate improvement is too high andexpected heat rate improvements on coal

- fired units are mo re in the neighborhood of 2

–

3%. So potentially

an y heat rate improvements may not be measureable, and therefore, not helpful in achieving Michigan’s goal. 14. Would EPA have the authority to administer EE programs if Michigan failed to achieve its 2030 go al? 15. How will EPA allow states flexibility accounting for units that are prevented from retirement due to reliability requirements? 16. How could a rate

- based approach work in a regional cap

- and

- trade program? 17. What happens 8 years out when a new source is no longer considered new? (see p. 34,908 end of third column of FR version.) 18. What if a state meets the final goal, but does not continue meeting it at some point past 2030? 19. Will states have the option to count efficiency investments on the utility side of the meter towards meeting carbon limits? They are as effective as customer improvements. Utility side of the meter improvements could provide additional advantages. Improvements to utility distribution could provide both carbon reduction and reliability improvements. 20. Under a rate

- based approach, if a coal plant is retired, are the numerator and denominator adjusted downward? If a new, more efficient plant replaces it, are the numerator and denominator adjusted upward? If so, wouldn’t this encroach on 111(b)? 21. How will measures purchased in conjunction with federal incentives (new furnaces, for example) or new appliance standards count? 22. What are acceptable guidelines for forecasting electricity demand growth over the compliance period (2020

– 2029)? How will new plants be accounted for? 23. Under a mass based approach, if a coal plant is retired, are the total pounds of CO2 adjusted downward? If a new plant replaces it, do the new CO2 emissions count? If so, wouldn’t this encroach on 111(b)? 24. What is the EP A’s rationale for rejecting h ydroelectric generation from every state’s renewable energy

portfolio, while at the same time crediting all other renewable energy in states that have much higher renewable energy capacity factors than other states? For example , Kansas has a great deal more potential for generating energy from wind than Virginia, but Virginia has a greater potential for hydroelectric generation than Kansas. Why is Kansas allowed to use all of its wind generation to satisfy the EPA’s GHG limit, b ut Virginia is not allowed to use any of its hydroelectric generation?