Brian Sandoval, Governor Department of Conservation & Natural Resources Leo M. Drozdoff, P.E.. Director 

# STATE OF NEVADA DIVISION OF ENVIRONMENTAL PROTECTION Colleen Cripps. Ph.D., Administrator February 6, 2012 Colleen McKaughan US EPA Region 9 75 Hawthorne Street San Francisco, CA 94105 Dear Ms. McKaughan: Enclosed please find information pursuant to your request for more information to help you make a decision and take final action as to the Nevada Division ofEnvironmental Protection's ("NDEP") determination ofBART at the Reid Gardner Generating Station ("Reid Gardner"). Your initial request dated December 23,2011, listed a significant amount of information that you considered to be important for your deliberations. Based on our subsequent teleconference, you narrowed that list substantially to vendor information supporting costs for the technologies that were considered for BART and to the model input files. Per our discussions with you on January 25, 2012, we are providing the following: 1. The modeling files that have been made available to NDEP by CH2M Hill, which performed the analysis utilized by NvEnergy for Reid Gardner; 2. Graphs ofthe cost analyses that include the values that EPA developed for the technologies under evaluation as compared to the values that NDEP used, which shows that the comparison ofthe incremental cost does not change even when EPA's values are substituted We apologize for not being able to get this information to you by February 3, 2012. We were initially focused on trying to get a realistic estimate ofthe time and cost that would be required to respond to your initial list. After our teleconference on January 11,2012, during which you substantially narrowed the request, and per our conversation on January 25, 2012, we focused on obtaining the model input files, which took quite some time to copy. Please do not hesitate to contact me if you have any questions.

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