# APPENDIX G
Okemo Limited Liability Company Operating Permit RACT provisions

AOP-04-029 Issued on February 26, 2006 Only portions highlighted are intended for inclusion in the SIP. Strikeout text is not intended for inclusion in SIP.v Ridge .,u.. v

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FACILITY PERMIT APPLICABILITY



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0 V .S.A . ~4556(c) and 556a(d)l (1) of the Regal-- (2) The Permittee shall c6rrtrol emissions fromthe ekiiting Caterpillar 3516diesel engine by operating a combined selective catalytic reduction system_(SCR) control device and oxidation catalyst that is designed and operated to achieve a minimumof ninety (90) percent reduction in the emissions of nitrogen oxides (NOx) during all periods of operation of the engine. The SCR control device:'systemshall also be designed and operated `to` limit ammonia<slip erriissicins in the ;;c~utl"otexhaust during all periods of operation of the engine. All elements of these air;poElution control systems shall be maintained in good working order at all times and operated in accordance with the manufacturer's operation and maintenance recommendations. The air pollution control systemshall be in operation whenever the respective emission source is in operation. [10 V .S .A§55fia(d)] [§5-251(3) ofthe Regulations] [RAGT Determination-September2000]

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- Operational Limitations - (5) The total capacity for all leased internal combustion engines operated at the Facility for purposes of generating compressed air for snowmaking, excluding engines classified as emergency use only, shall not exceed -11,515 brake horsepower combined. [10 v .S.A. §§556(c)] [§5-251(3) ofthe Regulations] (6) The total capacity for diesel engine generators operated at the Facility for purposes of generating electricity for snowmaking purposes shall not exceed 4,292 brake horsepower combined. [10v.s.A. §§556(c) and 10 V .S.A. §556a(d)] (7) The annual fuel consumption in .the stationary diesel engine units shall not exceed a combined 876,000 gallons per calendar year, based upon any rolling twelve (12) consecutive calendar month period: [1o VS A . §§556(c) and 556a(d)] [§5-251(3) ofthe Regulations]
(g) 

### The hours of operation of the Caterpillar 3516 diesel engine equipped with an oxidation catalyst and selective catalytic reduction technology shall not exceed 1,500 hours based on any rolling twelve consecutive calendar month period. [10 Vs.A . §§556(c) and 556a(d)] [§5- 251(3) of the RegutatJons] [Permit #OP-99-013] (10) The hours o

¬ operation of the two (2) Caterpillar 3516B diesel engine generators operated altthe Facility for purposes of generating electricity for snowmaking purposes shall not exceed III the following hour limits based on each engine's federal Tier certification: 

### (a) "The two (2) engines shall 'not exceed, a combined 1,500 hours based on any rolling twelve c©nsecutive calendar month, period when the most stringent certification isTier I; arid (b) e The two (2) engines shall not. exceed a combined 2,000 hours based on any rolling twelve consecutive caiendar rriorrtli peri4d when th~ most stringent certifidation is Tier Il': [10 V .S.A :§§556(c) .and 556a(d)] [§5-251(3) of the Regulations] [Permit# OP-99-013] (11) Oniy No. 2 fuel 611, off-road diesel fuel',- htghway-grade diesel fuel, or lighter grade fuel oils .with a maximumsulfur content not to exceed 0.5 percent byweight may be used as fuel in the stationary diesel engine units unless, the Permittee obtains prior written approval fromthe Agency to use another type of fuel . [10v .s.A. §§556(c) and 556a(d)) [§§5-501 and 5-1015(a)(1)-ofthe Regulations]Okemo Limited Liability Company #AOP-04-029

the Regulations]

- Emission Limitations - (14) Emissions fromall stationary diesel engines purchased, rented or leased at the Facility, excluding the two (2) rental Caterpillar 3516Bengines, shall, at a minimum, comply with the following limits: Pollutant Emission Limitations

Pollutant Emission Limitations g/bhp-hr' ppmvd ~ Nitrogen oxides (as N02) 4 .8 350 Carbon monoxide 2 .6 315 Particulate matter 0 .15 0 .021 gldscm 1 g/bhp-hr equals grams of pollutant emitted per brake horsepower hour. 2 ppmvd equals parts per million volume on adry basis corrected to fifteen (15) % oxygen. Any emission testing conducted to demonstrate compliance with the above emission limit shall be performed in accordance with 40 CFR Part 60, -Appendix A, Reference Methods 5, 7E, and 10 or equivalent methods approved in writing by the Agency, at the rated load and speed of the engine. Alternatively, comp[iati .ce may be demonstrated by verifying that the engine has met the engine certification requirements of 40,CFR,Part 89 for the Tier H_ emission standards or better. [1o v .s.a. §§s56(c) and 556a(d)J [§§5-251(3), 5-271 and 5- 404 of the Regulations]Okemo Limited Liability Company #AOP-04-029

(15) Emissiians from the SCR equipped C .atelCpillar 3 emission limits specified in thetable below ; 1~6 an

Igine shall not exceed the Pollutant Emission Limitations Pollutant Emission Limitations g/bhphr' Ibs/hr 1 Nitrogen oxides (as N02) 1 .6 5 .2 Carbon monoxide Q .6 1 .8 Particulate matter 0 .04 0 .1 ' glbhphr equals gra

;rrts, of pollutantemitted per brake horsepower hour. 2 Ibsfhr equals pound of pollutantemitted, perhour. Any emission testing conducted to derrionstrate compliance with the above emission limit shall be, performed~ in;,accordancea'with ,40 CFR Part-60, . AppendixY A ; Reference M~theds 5

; 7E, and 10 or equivalerit' methods approved in writing by the Agency at the rated load land speed of the engine. [1o V .s.A. 55sa(d)i [§§s-251(3) and 5-404ofthe Regulations] [Permit #oP-99-o13]Okemo Limited Liability Company #AOP-04-029

(18) Emissions fromthe two (2) rental Caterpillar 3516B engines shall, at a minimum, comply with the following emission limits for the 2005-2006 ski season: and the more stringent emission rates no later than July 1, 2007: Pollutant EmissionLimitations 2005-2Q06Ski Season Emission Limitations Pollutant Emission Limitations g/6hp-hr' ppmvd ` II, Nitrogen oxides (as N02) 6 .9 505 Carbon monoxide 3 .0 360 Particulate matter 0 .45 0 .063g/dscm July 1, 2007 Emission L.imitations Pollutant Emission Limitations g/bfip-hr' ppmvd'` Nitrogen oxides (as N02) 4 .8 350 Carbon monoxide 2.6 315 Particulate matter 0 .15 0 .021 g/dscm ' g/bhp-hr equals grams of pollutant emitted perbrake horsepower hour. 2 ppmvd equals parts permillion volume on a dry basis correctedtofifteen (15) °to oxygen. Any emission testing conducted to demonstrate compliance with the above emission lirnit shall be'performed in accordance with,'4Q OFR Part 60, Appendix A, Reference Methods 5

; 7E, and- 'FO or equivalent methods approved:iri writing by the Agency at -the rated load and speedofthe engine. Alternatively, compliance may be demonstrated by verifying that the engine has met the engirie oertification requirements of 40 CFI~ Part 89 for the Tier 11 emission standards or better. 11o v .s.a. ~§556(c) and 556a(d)I I§§5-251(3), 6-271 and 5- 404 of the Regulations]Okemo Limited Liability Company #AOP-04-029

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- Compliance Testing and Monitoring - (23) The Permittee shall, within 90days upon issuance of this Permit, develop and implement an operation and maintenance plan for the Facility engines as well as for the SCR catalyst emission control systemon the Facility's Caterpillar 3516 diesel engine: ,The plan shall address standard operation Ond maintenance procedures such as routine engine tune-ups, filter changes;d6talyst~deaning frequencies (not tor :exceed every 500 hours) and routine inspections, including inspection of the urea injection nozzles. The plan shall also include, but pot be limited to, predicted equipment replacement intervals, appropriate monitoring parameters to ensure proper ,operation, provisions . .for maintaining records" 6f routine maintenance inspections, findings~ of those inspections, and any corrective actions which wei~e taken . :fn addition, the plan shall also include provisions for testing the exhaust gases from ;, at a rriiriimurri ; the Caterpillar 3516 diesel engine with a portable NOx analyzer .and computing the .NOx destruction efficiency. Such testing shall be conducted, -at a: rninimum ; ;2itthe-begirining and midpoint of each snowmaking season. The portable analyzer shall be operated, maintained and calibrated in accordance with the manufacturer's recommendations . The Permittee shall revise this plan at the Agency's request or on its own motion to reflect equipment or operational changes. Said operation and maintenance plan shall be present at the Facility at all times and shall be made available to representatives of the Agency upon request . [io V

.S.A. §§556(c) and 556a(d)] [§§5-251(3) and 5-404of the Regulations] (24) The Permittee shall monitor and record the urea injection quantities on a daily basis during periods of engine operation in order to establish the normal operating parameters for the SCR systemand to thereafter determine periods of abnormally high or lowurea usage which could indicate stuck open or plugged injectors, respectively, or other problems requiring immediate maintenance. [1o v,s.A . §§556(c) and 556a(d)] [§§5-251(3) and 5-404 of the Regulations]
- Record Keeping and Reporting - (25) Records of Fuel Use: The Perrnittee shall maintain records o# the total quantity offuel oil consumed in the Facility engines combined; in=gallons, each month. [io v.s.A. §§556(c) and 556a(d)] 1§5-405(1) ofthe Regulations] (26) Records of Fuel Certifications; The Permittee shall obtain fromthe fuel supplier, for each shiprrient of fuel oil received at the Facility for use in the engines; a certification or invoice stating the sulfur content of the fuel oil . The certification or invoice shall include the name of the fuel oil supplier,,date of delivery, fuel type, quantity of fuel oil delivered, and a statement fromthe fuel oil supplier that the oil complies with the specifications for fuel oil numbers 1 or 2, as defined by the American Society of Testing and Materials in ASTM1a396, "Standard Specifications for Fuel Oils" ora statement as to the sulfur content of the fuel oil in percent sulfur by weight. [io v .s.A. §§556(0) and 556a(d)J [§5-405(1) ofthe Regulations]Okemo Limited Liability Company #AOP-04-029 felleWiRg~

e hol (31) Semi-Annual Periodic Monitoring Reports: Within thirty (30) days after July 1 and ,January 1,,of each year or an alternative schedule if, approved in writing by the Agency, the Permittee shall submit to the Agency a report containing the following information regarding the preceding six (6) months: (a) a summary of thefuel usage records required by this Permit; (b) a summary of all O&M performed on the Facility's engines and SCR catalyst emission control system ; (c) a summary of the urea injection usage rates; (d) the results of any emission testing performed on the Facility engines including results_ fromthe use of the portable NC3x analyzer, including the NOx reduction efficiency calculation for the Caterpillar 3516 unit; and (e) a statement of the sulfur content of any_and all fuel delivered to the Facility for use in the engines during the reporting period. [§§5-402(1), 5-405(1) and 5-1015(5) of the Regulations)Okemo Limited Liability Company #AOP-04-029

(32) Prior to each ski season the Permittee shall, in writing, provide the Agency with the following 'information,for each owned, rented and leased engine operated at the Facility, excluding emergency useonly engines: 

### (a) A listing, of each engine proposed, to be season; erated at the Facility during .the ski (b) Asummary of engine andernlssiori speeifications;: (c) A cumulative listin~ of the manufacturer's= ratecf horsepower output of each engine with. a certify statement that the Facifitjv=vitide cumulative horsepower capacity does .not exceed, the limits specified in this P~rmit; and (d) Acertification that all enine emission, rates meet the respective emission limits outlined in this Permit. [10 VS.A. §§556(c) and 556a(d)] [§§5-251(3), 5-271 and 5-404 of the Regulations)

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