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HomeMy WebLinkAboutBorrower's Environmental Report, Bernice Lake Power Plant Unit No. 4 and Beluga Station Oil Storage Facilities 1981BORROt.'JER IS ENVIRONHENTAL REPORT Eernice Lake Power Plant Unit No.4 and luga Station Oil Storage Facilities Chugach Electric sociation, Inc, August 1981 BORROWER'S ENVIRONMENTAL REPORT Bernice Lake Power Plant Unit No.4 and Beluga Station Oil Storage Facilities Chugach Electric Association, Inc. (Alaska 8) Anchorage, Alaska Loan Application AP-8 August 1981 fi~11L!S A1asxa i(eSGl>f(;;:S ;.:hil,rv Ot information Services Libm:, Juiiuing. Suite 111 321 i Pro',iticncc Drive Ancborage, AK 99508-4614 TABLE OF CONTENTS INTRODUCTION PART I -DESCRIPTION OF PROJECTS Bernice Lake Unit No. Beluga Station Oil Storage Facilities PART II -NEED FOR THE PROJECTS Bernice Lake Unit No. 4 Beluga Station Oil Storage Facilities PART III -ALTERNATIVES TO THE PROPOSED PROJECTS PART IV -EXISTING ENVIRONHENT Bernice Lake Power Plant Beluga Station PART V -ENVIRONHENTAL CONSEQUENCES and PART VI -HITIGATION MEASURES General Wildlife Bernice Lake Power Plant Unit No. 4 Beluga Station Oil Storage Facilities Vegetation Bernice Lake Power Plant Unit No. 4 Beluga Station Oil Storage Facilities Weather Water Bernice Lake Power Plant Unit No.4 Beluga Station Oil Storage Facilities Archeologic or Historic Site Impact Noise Air Bernice Lake Power Plant Unit No. 4 Beluga Station Oil Storage Facilities Bernice Lake Power Plant Unit No.4 PART VII -CORRESPONDENCE 2-10 2 6 11-14 13 14 14-18 18-23 18 19 24-31 24 25 25 26 26 26 27 27 29 29 29 30 30 30 31 31 31 60 GURE if 1 2 3 I II III IV V VI VII VIII IX X XI IVA LIST OF FIGURES TITLE Generation Facilities Natural Gas Consumption - Bernice Lake Power Plant Natural Gas Consumption Beluga 3_ation Input Parameters for Bernice Lake Anchorage Wind Rose Short-Term Ground Level Concentration Plot of Short-Term Ground Level PAGE 3 5 9 39 40 41 Concentration 42 Averaging Time Correction 43 Probability of Wind Speeds for inchorage 44 l:-1aximum Grcund Level Concentra,:'~ons of NO X and Corresponding Dis~ ,nces 45 National Ambient Air Quali St lndards 46 Plot of Annual Ground Level Co centrations 47 Concentration Values for Grour ~ Level Concentration Isopleths 48 Allowable Increment vs. GrOU~l ~ Level Concentration 49 Total Downwind Ground Level '~Jncentrations vs. !)ownwind Distance at Vfrious Wind Speeds for Stability Compalison 54 IVB Total Downwind Ground Level Concentrations vs. Downwind Distance at V1rious Wind Speeds 55 XII State of Alaska Air Quality Control Program Standards and Lirni-','tions 56-59 INTRODUCTION This Borrmver' s Environmental Report (BER) discusses immediately needed generation improvements at two Chugach Electric Assoc ion, Inc. (Chugach) generation plants, as those improvements are identi ed in Loan Application AP-8 to the Rural Electrification Administration (REA). The appli- cation seeks REA loan guarantees for the full cost of the projects, which are to be financed through the Federal Financing Bank. The projects consist of: 1) A 26-ffiv simple cycle combustion turbine to be known as Bernice Lake Unit No.4, at Power Plant, and e 2) Two 54,800-barrel oil storage tanks and related facilities at Beluga Station. This BER has been prepared pursuant to the rations of Part One of REA bulletin 20-21:320-21, as published in final form in January 1980, and to guidelines of that same bulletin's t Three, Exhibit E. Chugach was incorporated in 1948 under the laws of the State of Alaska to participate in programs of the Rural Electri- fication Act of 1936, as amended (7 U.S.C.A. 901 et s .). Chugach is a member-owned electr cooperative serving within the Municipality of Anchorage and the eastern portion of the Kenai Peninsula to the south. Chugach is the largest electric utility in Al , serving approximately 51,000 retail consumers plus three electric distribution power at wholesale. stems which purchase electric The three wholesale consumers are Matanuska Electric soc tion, Inc. (Matanuska) of Palmer, Alaska, which serves app ely 13,000 consumers within the Eagle -Chugiak, Mantanuska Valley and Susitna Valley areas north of Anchorage; Homer Electric Association, Inc. (Homer) of Homer, Alaska, which serves approximately 11,000 consumers throughout the southern and western sections of the Kenai Peninsula south of Anchorage; and the Electric Utility Department of the City of Seward, Alaska, which serves approximately 1,000 consumers in that eastern i Pula city. PART I -DESCRIPTION OF PROJECTS Bernice Lake Unit No.4 unit will be a General Electric Co. Gas Frame Size 5, Model P, simple cycle combustion turbine rated at 26 ~~. As with ting three units at the Bernice Lake Plant, pr 1 Unit No. 4 will be natural gas, with 1 dis 1 te oil as back-up. (See figure 1.) Three oil s tanks with capacities of 477 barrels, 72 barrels and 24 barrels - a dy st at the plant, and no additional oil st li ties are planne,d. Average daily gas consumption of Unit No.4 11 be approximately 6,000 mcf. Unit No.4 11 be a package power plant very similar to Bernice Lake Unit No.3, and will be located on the power plant grounds approximately 25 feet north of Unit No.3. (See Attachment 1.) . As a own all-wea power plant, Unit No. 4 will be installed in its enclosure measuring approximately 100 feet in -2- CHUGACH ELECTRIC ASSOCIATION, INC. Anchorage, Alaska August 1, 1981 GENERATION FACILITIES Generation Plant Unit Fuel Beluga Station 1 Natural Gas (Combustion Turbines 2 Natural Gas and Was te Heat) 3 Natural Gas 4 Natural Gas 5 Natural Gas 6 Natural Gas 7 Natural Gas ,',8 Waste Heat Bernice Lake Power Plant 1 Natural Gas (Combustion Turbines) 2 Natural Gas 3 Natural Gas 'iIItt1 Cooper Lake Power Plant 1 Hydro (Hydro Turbines) r-Hydro L. International Station 1 Natural Gas (Combustion Turbines) 2 Natural Gas 3 Natural Gas Knik Arm Power Plant 1 Natural Gas (S team) 2 Natural Gas 3 Natural Gas 4 Natural Gas 5 Natural Gas Purchased Power Alaska Power Hydro Administration Total Base Capacity .., "{Scheduled to be available for s ce in late 1981. Figure 1 -3- Base Rating (35 0 F) 14.0 MW 14.0 MW 51. 0 MW 9.3 MW 60.0 MW 62.0 MW 62.0 MW 54.0 MW 7.5 MW 16.5 MW 23.0 J:-1VJ 7.5 MW 7.5 MW 14.0 MW 14.0 MW 17.0 MW 0.5 MW 3.0 MW 3.0 Mh7 3.0 MhT 5.0 ~.J 9.0 ~.J Plant Total 326.3 MW 47.0 MW 15.0 HW 45.0 MW 14.5 MW .0 MW 456.8 MW length, 20 t width and 30 t in height. The unit will consist of five basic components: The control package, the accessory and s turbine package, the generator package, the water injection (NOx control) package and the excitation/switchgear pac~~ge. Configuration will be very similar to that of Unit 3. Natural for the Bernice Lake plant is produced from nearby fields and purchased at retail from Alaska Gas and Service Company under that firm's tariff as filed with the Alaska Public Utilities Commission. Annual gas consum~tion at Bernice Lake Power Plant was 2,075,322 mcf in 1979 and 2,395,548 mcf in 1980. Monthly consumption levels are shmVTI in Figure 2. Descriptions of the existing Bernice Lake un s, rated at 35 0 F MSL, are as follows: Unit No.1 - A Westinghou.se 101 simple-cycle turbine with a rating of 7.5 MW. It is inte- grated with a 60,000 lb/hr., 250 psi auxiliary- fired waste heat boiler, which supplies the adjacent Chevron U.S.A. refinery with 30,000 - 40,000 lbs./hr. of steam when Unit 1 is operating. Unit 1 has been modified to burn natural gas. It previously was fueld by light distillate oil, which still can be used. Unit 1 was installed and placed on line 1963. -4- NATURAL GAS CONSUMPTION 1979 1980 1981 January 229,317 MCF January 351,000 MCF January 247,929 MCF February 261,831 MCF February 286,333 MCF February. 219,478 MCF March 275,298 MCF March 192,623 MCF March 184,013 MCF April 250,433 MCF April 215,615 MCF April 153,104 MCF May 78,581 MCF May . 143,192 MCF May 365,124 MCF June 76,768 MCF June. 106,500 MCF June. 244,704 MCF July 80,400 MCF July. 91,385 MCF Total: 1 414 352 MCF August 79,592 MCF August. 133,018 MCF September 83,338 MCF September 129,587 MCF N Q) October 138,744 MCF October 188,160 MCF H I ;:\Lf') bJ)1 November 214,893 MCF November. 187,630 MCF '''''; J::t.. December 306,127 MCF December. 370,505 MCF Total: 2 0 322 MCF Total: 2,395,548 MCF ) ) ) Unit No.2 -A General Electric Frame Size 5 simple-cycle turbine rated at 16.5 MW. It can burn light distillate as a backup fuel. The unit was installed and put on line in 1971. Unit No.3 -A General Electric Frame Size 5 simple-cycle turbine rated at 23 MW. It can burn 1 distillate oil as backup fuel. The unit was installed at put on line in 1978. Beluga Station Oil .?,!::orage Facilities The tank farm will consist of two fuel oil storage tanks with capacities of 54,800 barrels each. The tanks will be utilized for storage of light distil te oil as backup for the primary natural gas fuel to the gas turbine Units 1 and 2, each of wh h are rated at 14 HW. The s tanks will be located in a diked area in compliance with the NFPA regulations for reta of spills and proper fire protection. Oil from the s tanks will be pumped to a fuel skid for filtration and further elevation of pressure for atomization at the turbines. The turbines will be modified to burn oil with a fuel divider, oil atomization nozzles and modified combustors. The tanks will be located on the exist power plant site approximat 600 feet north of the powerhouse building. Oil will gravitate to a pump house, where forward pumps will direct it to the fuel skid. Excess oil will be returned -6- to the tanks. Piping will be installed between the tanks and the turbines to convey the supply and to return oil. The tanks will be constructed from steel in accordance with API Standards 650 and 2000 for the design and erection oil storage tanks. The storage tanks 11 be charged by tanker truck. Oil will be delivered by barge to an sting shoreline unloading site approximately six miles west of the plant, where the tanker trucks 11 be filled. The trucks will transport the oil over an existing gravel road to a charging pump at the tank farm. Oil will be pumped from the trucks to the storage tanks. Spill prevention and control procedures and techniques will be developed all handling locations. At Beluga Station, Chugach has long-term gas supply contracts with the three producers of the field -Chevron U.S.A., Shell Oil Company and Atlantic Richfield Company. The three producers each hold an undivided one-third interest the field, with Chevron U.S.A. serving as operator. The fuel supply contracts provide Chugach with 373 million mcf of gas through 1998, although under planned expansion of Beluga Station, Chugach expects to utilize its commitment in the mid-1990's. The contracts with the producers of the gas field now pro- vide Chugach with a maximum of 60,000 mcf/day. No alternate fuel is provided, and the existing plant uoes not now have alternate fuel utilization capabili The present rated capacity of Beluga Station for Units 1-7 is 272.3 1'1h1, \vith Unit 8 scheduled for service in late 1981. (See figure 1.) Annual gas consumption was 16,911,248 mcf in -7- 1980. Monthly consumption rates from January 1979 through June 1981 are shown in Figure 3. Average daily consumption rates for the individual units are as follows: Unit No. 1 6,000 mcf/day Unit No. 2 6,000 mcf/day Unit No. 3 14,000 mcf/day Unit No. 4 3,700 mcf/day Unit No. S 14,000 mcf/day Un No. 6 20,800 mcf/day Unit No. 7 20,800 mcf/day -8- NATURAL CONSUMPTION --BELUGA STATION 1979 1980 1981 January . · 1,481,325 MCF January 1,727,262 MCF January 1,514,031 MCF February. 1,585,698 MCF February. 1,427,568 MCF February. 1,429,326 MCF March 1,492,278 MCF March 1,526,.514 March 1,613,139 MCF il 1,192, MCF April 1,281,552 April 1,547,130 MCF May . · 1,2 ,013 MCF May . 1,282,248 MCF May 1,157,088 MCF June. 1,2 ,557 MCF June. 1,139,217 MCF June. 1,213,248 MCF JUly. 1,257,816 MCF July. 1,192,875 MCF Total: 8 473 962 August. · 1,218,141 MCF August. 1,073,214 MCF M September 1,273,758 MCF September 1,362,420 MCF (jJ I 0'\ OC 1,492,104 MCF October 1,475,043 MCF I f:J... November. 1,542,6 MCF November. 1,613,457 MCF December. 1,847,937 MCF December. 1,822,878 MCF Total: 16,911,795 MCF Total: 16,924,248 MCF· ) ) ) Descriptions of the sting Beluga generating units, rated o at 35 F MSL, are as follows: Unit No.1 -A General Electric Frame Size 5 simple-cycle turbine rated at 14 MW. It was installed and placed in service in 1968. Unit No.2 -Same as Unit 1. Unit No.3 -A General Electric Frame Size 7 regenerative-cycle turbine rated at 5 7 l-fi-l. It was in s tall e d in 1972 and placed in service in 1973. Unit No.4 A Worthington jet, gas-powered turbine rated at 9.3 H\iJ. It is a stand-by unit installed in 1974 and made available for service in 1975. Unit No.5 -A General Electric Frame Size 7 regenerative-cycle turbine rated at 60 MW. It li.Jas installed placed in service in 1975. Unit No.6 -A Turbodyne Corporation simple-cycle Unit No.7 turbine rated at 62 MW. It was installed in 1975 and placed in service in 1976. Same as Unit 6. It was stalled in 1977 and placed in service in 1978. Unit No.8 -A Brown-Boveri Turbomachinery steam turbine rated at 54 i'IW and p01;vered by waste heat from Units 6 and 7. It is under construction and scheduled to be avail Ie for service in late 1981. -10- PART II -NEED FOR THE PROJECTS Both Bernice Lake Unit No.4 and the oil storage facilities at Beluga Station are needed on the priority basis to ensure adequate and reliable generation for the 1981-82 winter peak demand period. Loads on the idly developing Kenai Peninsula have grown to the po where loss of individual generation units there, or loss of the single-circuit 11S-KV line from Anchorage, would pose a serious reliabili problem. At Beluga Station --Chugach's major generation installation, serving the Anchorage and Hatanuska Valley load centers directly --generation capacity has outstripped the plant's natural gas delivery system, which is owned and maintained by the gas eld producers. These situations will be discussed individually and in detail below. The overall generation capacity of the Chugach system is 402.8 ~~ (exclusive of Beluga Unit No.8) from five plants, four of which are operated with natural s and the fifth with hydro power. (See Figure 1). In addition to Bernice Lake Power Plant, Cooper Lake Power Plant --with two 7.S MW hydro ines --is located on the Kenai Pen ula. The ssil fuel plants two Anchorage, plus Beluga Station and Bernice Lake --collectively contain 13 gas-d combustion turbines and S gas~fired boiler/steam turbines (plus waste heat unit under construction at Beluga). Additionally, Chugach has a 9-MH entitlement from the Alaska Power Administration's Eklutna Project, a 30-MlV hydro ility located approximately 30 miles north of Anchorage. The Alaska Power Administration is an agency of the U.S. Department of Energy. -11- Overall, load growth continues bri in the Southcentral Alaska area served by Chugach and s wholesale consumer-utilities. Chugach's 1980 Power Requirements Study, prepared by Southern Engineering Company of Georg ,forecasts that energy requirements on the Chugach system will grow by 10.3 percent annually through 1983, and by 8.1 percent annually from 1984 through 1988. System peak demand is projected to rise from 337.4 ~ru in December 1980 (actual) to 430.2 ~ in 1984 and 648 ~ru in 1988. A principal reason for the continuing increase in power demand a sharp increase in the population of Southcentral Alaska. The Municipality of Anchorage -consolidated in 1975 from the Greater Anchorage Area Borough and the City of Anchorage - is by far the largest population center in the state. According to 1980 census figures, nearly half of Alaska's population of 400,481 resides within the Municipality of Anchorage. Betw~en 1970 and 1980, U. S. Census Bureau figures show, the area now constitut the Municipality grev7 by 36.9 percent -from 126,385 to 173,017. The Municipality's Planning Department forecasts the 1988 population to be 242,209, a 40 percent increase over 1980. The Matanuska-Susitna Borough, which borders Anchorage on the north and west and which is served by Matanuska Electric Association, more than doubled from a 1970 population of 6,509 to a 1980 population of 17,776, according to the Census Bureau. That represents a 172.9 percent growth rate over the 10-year period. The Borough Planning Department estimates that the population will be 46,000 by 1988, an increase of 158 percent over 1980. -12- For Kenai Peninsula Borough south of Anchor , the Census Bureau lists a 1967 population figure of 16,586 and a 1980 figure of 25,282 repr-senting a growth rate 52 per cent. Borough planners estimate the 1988 population will be 37,596, or 49 per cent over 1980. The Kenai Peninsula Borough figures include the City of Seward. Bernice Lake Unit No.4 Recent annual peaks Homer Electric Association system have been: 1978 -79 48 MW 1979 -80 53 MW 1980 -81 58.5 MW 1981 -82 64.5 MW ( ast) The sting installed capacity the Kenai Peninsula is: Bernice Lake 47 MH Cooper Lake 15 M\.J Total 62 MW The peninsula is linked to the rest of the Chugach power supply system by a single-circuit 115 KV transmission line which is routed through rugged, mountainous terrain. Inter- ruption of service by a single contingency which disrupts or disables this line leaves the Kenai Peninsula with a possible load peak in excess of local generation capacity. This transmission line has historically been subjected to high winds and avalanches. During the 1979-80 season, avalanches caused outages amounting to several months of time. Hence, it has become essential to have additional eration on the Kenai Peninsula to meet escalating maximum load demands. -13- Beluga Station Oil Stora~acilities The present combined consumption of gas at Beluga Station is 85,300 mcf/day, which exceeds the Chugach take of 60,000 mcf/day. With major Units 3, 5, 6, and 7 in full operation, the maximum available gas quantity is fully utilized. Units 1, 2 and 4 can only be operated when other units are part lly loaded or during the outage of a major unit. Consequently, additional fuel is required to utilize the full capability of the plant at anyone time. Because additional gas is not available, the most viable alternative is to modify Units 1 and 2 dual-fuel firing, to allow peaking service on oil for full plant capacity during those short periods of high demand. PART III -ALTERNATIVES TO THE PROPOSED PROJECTS As a practical matter, alternatives are very limited by the urgency and site-speci nature of the situations. A power supply contingency problem exists on the Kenai Peninsula because of rising tion demands there and because thearea is linked to by a single-circuit 115 KV transmission line which passes through formidable terrain that is subject to severe winds and avalanches. Addi- tion of a fourth combustion turbine unit at Bernice Lake Power Plant is by far the quickest and most economical means of alleviating the problem. -14 At Beluga Station, the available gas from the field's producers cannot meet the needs of the all existing genera- tion units during periods of peak demand. Thus, the question is not whether to add additional generation but how best to provide enough fuel to power all existing units when the need arises. Oil storage facilities are the most expeditious and cost-effective solution. Encompassing the Kenai Peninsula and the Beluga Station situations is the immediacy aspect. Because Chugach is a winter-peaking utility, and because of the severity and duration of winters in Southcentral Alaska, it is imperative that both the Kenai Peninsula and Beluga Station problems be resolved for the 1981-82 winter peak demand period. The proposed projects represent by far the most feasible means of accomplishing these objectives. Alternatives to the proposed projects include: 1. Construction of new generation plants. As discussed above, this is not feasible because of lead times and economics. New power plants would be vastly more expensive and could require up to 10 years or more to construct. In addition, the porposed improvements at existing power plants will result in much less environmental impact than construction of generation facilities at any new location. 2. Use of alternate fuels. Only natural gas and oil can be readily burned in combustion turbines. Use of some other fuel -15- such as coal or water --would necessitate much more extensive and costly construction involving longer lead times than the Kenai Peninsula and Beluga Station circumstances warrant. Clean-burning and relatively inexpensive natural gas will continue to be utilized to the maximum extent at both Bernice Lake Power Plant and Beluga Station. Oil will be utilized only as an emergency back-up fuel at those plants. Use of fuels other than gas or oil to resolve the immediate problems is not feasible. 3. Additional generation at other existing plants. In add ion to Bernice Lake Power Plant, the only major generation plant on the Kenai Peninsula is Chugach!s Cooper Lake Power Plant, a lS-}lli hydro facility. Enlargement of that ins lation is constrained by its water source --Cooper Lake. Improvements to the lake and hydro facilities there would be almost pro- hibitively expensive and would require a number of years to effect. At Beluga Station, the question, as previously dis- cussed, is one of fuel availability rather than generation capacity. It simply would not be feasible to consider installa- tion of add ional generation facilities at another plant when unused capacity sts at Beluga Station. Providing an adequate fueld supply through installation of storage facilities is the logical solution. 4. Transmission line construction. Construction of an addi- tional transmission line between Anchorage and the Kenai Peninsula -16- load centers would increase reliability for the peninsula over the existing single-circuit lls-KV line serving the area. However, any new transmission line vlOuld be very costly, and would require a minimum of three years' lead time. A new circuit would be also subject to the same natural dangers --such as winds and avalanches that plague the existing line. While an additional and/or higher voltage transmission circuit may well be constructed at some future date, it is not a feasible alternative for meeting the immediate electrical contingency needs of the Kenai Peninsula. 5. Purchase power. No purchase power is currently available to meet the needs as detailed in this BER. 6. Conservation. Chugach has a comprehensive energy con- servation program for its consumers, itself and its employees. The program includes a sophisticated horne ene:gy audit service, conservation consultations, conservation information dissemlnation and liaison with the Alaska Division of Energy and Power Develop- ment. However~ energy conservation activities cannot counter- balance the increasing electrical demands caused primarily by the population influx to Southcentral Alaska. The 1980 census figures, referenced previously in this BER, speak for themselves. Chugach's 1980 Power Requirements Study forecasts a 10.3 percent annual electrical requirements growth rate through 1983, and an 8.1 per- cent rate from then through 1988, conservation efforts notwith- standing. Moreover, the need for Bernice Lake Unit No.4 and for the Beluga Station oil storage facilities is real and immediate --a function of generation reliability as much as capacity. -17- 7. No action. The proposed projects are essent 1 if Chugach is to continue to carry out the obligations explicit in its contractual obligations to its retail and wholesale consumers ike. Those obligations are to provide an adequate and dependable supply of electric power at the most reasonable cost. PART IV -EXISTING ENVIROmlENT Bernice Lake Power Plant Bernice Lake Power Plant is located at Nikiski, Alaska, near the east 3hore of Cook Inlet on the Kenai Peninsula, within Kenai Peninsula Borough approximately 176 statute miles from Anchor (See Attachment 1.) The nearest cities are Kenai (pup. 4,324), 10 miles southeast of the plant on the North Kenai Road, and Soldotna (pop. 2,320), approximately 20 miles southeast by highway. The nearest municipal airport is at Kenai. The power plant is situated just 0 the west side of the North Kenai Road, adjacent to a petroleum refinery operated by Chevron U.S.A. Bernice Lake, a water impoundment approximately one mile in length and a half-mile in width, is located across the North Kenai Road from the power plant. Moose, an occasional black bear, fox, other small land- dwell animals and a variety of birdlife may be seen in the general area. The subsequent discussion of endangered and threatened species Beluga Station appl s to the Bernice Lake area. -18- Huch of the area north of the plant is in its natural forested state. An industrial area lies to the south. 1'1ajor industries there include the Chevron U.S.A. refinery, a Phillips Petroleum Corp. s liquefaction plant, a Coll Carbon & Chemical Corp. urea plant and a Tesoro-Alaskan Petroleum Corp. r inery. Crude oil and natural gas taken from on-shore and shore f lds in the area supply the petroleum installations. Petroleum is a major local economy. The Chevron U.S.A. refinery is at the western boundary of the power plant, between the plant and the eastern shore of Cook In The power plant is separated from the North Kenai Road on the east by a swath of woodland about 100 yards wide. Residential development is sparce in the near vic ty, and is centered along North Kenai Ro the primary highway in the area. Bernice Lake Power Plant is located on an approximately 2.5- acre site leased from Chevron U.S.A. and adjoining Chevron's refinery there. The lease period is through Nov. 30, 2011. Chugach, in turn, sublets a portion of its site to Homer Electric Association for the latter's substation and transmission ilities. Chugach provides wholesale power to Homer in part through an intertie at the Bernice Lake plant. tion Beluga, Alaska, is located approximately 40 a miles west of and across Cook Inlet from Anchorage. The Beluga area is -19- located on a plain near the base of the Chigmit Mountains. (See Attachment 2.) The nearest major watercourse to power plant is the Beluga River, which meets Cook Inlet approximately seven miles northeast of Beluga Station. The power plant itself is located on an SO-acre tract leased by Chugach from Cook Inlet Region, Inc. (CIRI) for a 55-year period from May 19, 1966. CIRI is an aska native regional corporation established under the aska Native Land Claims Settlement Act. lug a Station is situated within the Beluga River Gas Field, from which fuel for the plant is produced. Except for the power plant and for gas field operation and maintenance cilities, the surround area is undevelop and in its natural state. The nearest community is the Indian Village Tyonek (pop. 232), approximately 10 miles southwest of the power plant and connected to it by a two-lane grav~l road maintained largely by the operators of the gas field. Approximately two dozen homesteaders live in the general area of Beluga Station. A few recreational dwellings are inhabited on a transient basis. In general, the Beluga area is remote from population centers of the ion. The principal means of access to Beluga Station is aircraft, which use a nearby 5,000-foot gravel a strip to transport personnel and most equipment to the plant on nearly a daily basis. The private strip, constructed by Chevron U.S.A. (operator of the gas field) and maintained by Chugach, is reached from the power plant by a two-lane gravel road. Beluga Station also is accessible by boat. and s and barges are us to deliver materials too heavy or otherwise not transported by aircraft. The only land access is a winter haul road usable only when marshy areas and stream crossings are frozen. The land -20- route is circuitous, necessitat travel around the Knik Arm of Cook Inlet - a distance of approximately 125 miles from Anchorage. The following species of wildlife may be found in the gene:al area of Beluga Station: (1) Moose (Alces alces) -Common in the area, with greatest concentrations in the often seen on the per itself. ing and summer. Hoose are ter of the plant compound (2) Black bear (Ursus americanus -Common the area, and occasionally seen at the plant site itself. Concentrations, particularly during salmon spawning seasons, occur along Susitna River, about 15 miles northeast of the plant, and the McArthur River, about 35 miles southwest of the plant. (3) Brown izzly bear Ursus arctos) -Present in the area but infrequently seen. Suspected denning areas are just south and southwest of Beluga Lake, about 25 miles northwest of the plant. Seasonal concentrations occur along nearby fish streams such as Chuit Creek, Bishop Creek, Drill Creek, Theodore River. and (4) Red (Vulpes vu -Common in the area, and frequently seen at the plant site. (5) vJolf (Canis lupu~) -sent in the area but rarely seen. (6) Ho (Gulo luscus -Present in area but rarely seen. -21- (7) Lynx (Lynx canadensis frequently seen. esent in area but (8) Snowshoe hare (Lepus canadensis -Common in the area. (9) Harbor seal Phoca vitulina -Present along the Cook Inlet coast but infrequently seen. (10) Beluga whale De terus leucas -Present in Cook Inlet and frequently seen at mouths of nearby rivers during salmon spawning seasons. (11) Waterf and seabirds A variety of species nest and molt in the area, and are frequently seen at those times. Beluga is near several major waterfowl migration routes Contact with the area office of the U.S. Fish and Wildlife Service verified that no threatened or endangered species are found within or near the general areas of the projects. are three major plant communities the Beluga Station vicinity: (1) Spruce-birch forest, (2) water courses and (3) bogs. The power plant proper is surrounded by a spruce- birch stand which is bisected by a small stream northeast of the station. A bog borders the forest stand on the south and west. The st is typical of those found in the lower Susitna Valley and appears to have had little disturbance, such as fire, a number of ars. Many of the birch are mature and some have died. The spruce are beginning to dominate. The stand is rela- tively stable. As as successioned stages, the community is not at cl 22- The bog community is typical of those the lower Susitna Valley, dominated by low shrubs. The bog is relatively drier than many the area, probably result from a certain amount of drainage through sub-surface gravels. The stream course is open, having low shrubs and se es, and bordered by a few cottonwood, alder, spruce, and birch. Shrubs, other than alder, are mostly willow along the stream. There are some natural disturbances in the vicinity of the station along the stream course. Those areas are identifi le by the vigorous stands of fireweed and bluejoint grass. Man- caused sturbances (i.e., road clearing, etc.) include similar tation stands. Generally, the plants coming in on the dis- turb areas are more vigorous than their counterparts in the undisturbed areas (bush cranberry, bluejoint, carex spp., willow, fireweed, etc.). setum ai-'vense is the dominant horsetail in the open areas and trees. lvaticum preaominates under the Species involv the cleared areas are: fireweed, blue- joint, birch, cottonwood, and a mustard. The woody agrostis scabra (small grass), ecies appear to dominate. Soils are alluvial over gravels. -23- rose PART V -ENVIRONMENTAL CONSEQUENCES and PART VI -MITIGATION MEASURES General No additional land acquisition will be necessary, and minimal construction at the sting plant sites will be required. Approxi- mately three acres of spruce and birch trees will be cleared to accommodate the tanks and diking at Beluga Station. Overall dis- ruption dur construction will be minimal. Peak work forces are estimat at 20 each for installation the Bernice Lake Unit and for the Beluga Station storage facilities. Because the Bernice Lake plant is in a developed area easily accessible by highway, it is anticipated that that work force will comoute by private motor vehicle from nearby homes or motels. Workers will be flown to the remote Beluga site, and housed and fed in existing permanent construction camp facilit s at the power plant. Although neither of the proposed projects involves trans- mission or distribution lines, Chugach will follow, where appro- pr te, guidance contained Environmental iteria for Electric Transmission Systems the planning and construction of the subject projects. Chugach will undertake additional mitigative measures as necess for environmentally sound construction and operation of the projects. There are no known unusual or sensitive environ- mental issues thin the area of either project. -24- The sites on which the units will be locat are nearly level and require only minor drainage alternations. In general, existing 1 contours will be modified only as necessary to provide level areas for foundations. Natural dra patterns will be rna ained to minimize overall the possibili of erosion. The U. S. Soil Conservation Service will be consult with regard to erosion prevention and control, and its recommendations will be followed. Contractors will be instructed to adhere to such recommendations to prevent or control erosion during and after construction. Any brush cleared during site preparation 11 be chipped and spread as mulch. Contractors will at all t s keep premises free of is to the extent practical, and will spose of such material at established landfill sites. Waste oil and other excess petroleum products will be placed in seal containers and transport to approved disposal or reprocessi areas. ~Jildlife Bernice Lake Power Plant Unit No.4 Because the installation of Unit No. 4 is at the existing plant site, the project will have virtually no impact on wildlife. Marine li will be unaffected since no stream or sea water will be used by the proposed gas turbine unit. Because off-site construction impact will be negligible, such disruption during instal tion will be minimal. -25- Beluga Station Oil Storage Facilities Other than relocation from the plant site itself, lar(- dwelling wildl in the area has been affected little by t existing facility. A variety land animals has conintUi-~ 1 to populate the vicinity since the plant was constructed in 1968, and some even inhabit the perimeter of the compound. Lik se, no disruption to avian life has been noted. Wildl will be displaced from the three acres to be cleared for placement of storage tanks and diking. Aside from that, there will be no permanent ef ct from the prc.ect. r1arine life will be unaffected, since no stream or sea wa'-er is or will be used or discharged by the project. In general, wild- life in the area will take 1 tle notice, except during the construction phase when temporary~ localized disruption may occur. Vegetation Bernice Lake Power Plant Unit No.4 Vegetation will not be affected by this project, b.cause the unit will be install at the sting developed pllnt site. No impact on surrounding vegetational systems is known :0 have resulted from existing units at the plant, and no such impact is expected from Unit No.4. (Stands spruce and birch constitute the predominant vegetation of the surrounding area.) -26- Be Station Oil Approximately three acres of spruce/birch woodland approxi- mately 600 feet north of the powerhouse, but thin the plant site, will be removed to accommodate the tanks and surrounding dike. Other than that clearing, there will be no v tative disturbance. The dike and any other exposed area will be stabilized and revegetated, to event erosion. Specialists with the U. S. Soil Conservation Service will be consulted as necessary. Trees cleared from the three acre tank and diking site will be limbed and stacked for use as firewood. Brush will be chipped and spread as mulch. Weather Although no comprehensive meteorological data is available for the Bernice Lake area or the Beluga area, meteorological infor- mation for Anchorage can generally be applied. Allowance should be made for slightly higher wind velocities and precipitation, and for slightly increased seasonal temperature ranges. Winds in the Anchorage area generally are not severe. The prevailing surface wind direction is from the north. NOAA records from 19 through 1965 show that northerly winds occur in the area 10.5 cent of the time, with a mean speed of 6.9 mph. North-northeast winds occur 9.1 per cent of the time, with the same mean speed. During the warmer months -May through August - -27- the wind direction is from the south. Southerly winds occur 9.2 per cent of the time, with a mean speed of 8.3 mph. South- southeast winds occur 7 per cent of the time, with a mean speed of 8.9 mph. The relatively light winds, the locations of the plants with respect to population centers and the relative pollution- free generation fuel all serve to diminish any adverse effect on air quality by the proposed projects. o The highest temperature of record in Anchora8e was 86 F in June, 1953, and the lowest was minus 38°F in February, 1947. Based on records from 1931 to 1960, the mean annual temperature in Anchorage is 34.8°F. Mean annual precipitation is 14.71 inches. Snowfall averages 66 inches annually. For the past eight years, Chu8;ach has operated a "Climat" weather station at Beluga Station for the National Weather Service. The official Weather Service station measures temperature and precipitation. Readings are taken daily by plant personnel and reported to the Weather Service on a monthly basis. In addition, Chugach has operated since July 1976 a particu- late matter sampling station at Beluga for the Cook Inlet Air Resources Management District, the local air quality agency. The monitoring equipment consists of a high volume sampler and a dust bowl. -23- Water Bernice Lake Power Plant Unit No.4 There will be no impact on water quality lation and operation of Bernice Lake Unit No.4. the instal- The NOx control system Bernice Lake Unit No. 4 will require approximately 3.5 gallons per minute of water (the same as the NOx control system for B ce Lake Unit No.3), but the supply will come from existing on-site wells s the plant. The water is ected into the turbine's combustion chamber where it is vaporized in the NOx control process. No water or other substance will be discharged om Unit No. 4 into any stream or other water body. Water the drinking and sanitary purposes construction personnel is a eady available at the plant. B e Facilities The oil storage facilities will have no impact on water quality. cilities will not require a water supply, and no water or 0 substance will discharged into stream or other water body. As at Bernice Lake Power Plant, drinking and sanitary facili- ties water construction personnel is already available at the plant. -29- Archeologic or Historic Site Impact As previously stated, both projects will be located on existing plant sites. Chugach has examined the National Register of Historic Places, including monthly supplements, and has de- termined that there are no properties listed therein which are located at or close by either power plant. There are no National Register sites within 25 miles of Beluga Station, and the nearest such site to Bernice Lake Power Plant is 10 miles away. Both power plant sites were given archeologic and historic clearances from the Alaska State Historic Preservation Officer by letter dated May 18, 1977, in connection with previous genera- tion projects. Nonetheless, Chugach has written the Alaska Office of History and Archeology in connection with the currently pro- posed projects. A copy of Chugach's letter is in the "Correspondence" section (Part VII) of this BER. REA will be promptly furnished with the Office of History and Archeology's response to Chugach's most recent letter. If, during the construction of either project, a potentially significant, previously undiscovered archeologic or historic site is found, construction will cease in the surrounding area and REA and the State Historic Preservation Officer will be notified as soon as possible. Noise Bernice Lake Power Plant Unit No.4 Bernice Lake Unit No. 4 will meet noise exposure limits as established in the Walsh-Healey Public Contracts Act and as -30- incorporated ~n Occupational Safety and lth Act (OSHA) requirements for occupat 1 noise exposure. The unit will be equipped with inlet and exhaust silencers to attenuate sounds from the compressor inlet and turbine exhaust ducts. Sound suppressive materials will be used on the interior of the side and roof panels of the turbine and accessory compart- ments, and on the side panels of the generator compartment. Ear protection equipment is provided for power plant personnel and visitors. Beluga Station Oil Storage Facilities There will be no noise associated with the operation of t oil storage facilities. As at Bernice Lake Power Plant, ear pro- tection equipment is provided for plant personnel and visitors at Beluga Station. Bernice Power Plant Unit No.4 Natural gas is the cleanest of all fossil fuels. Natural gas has no sulfur content and leaves tually no ash when burned. Analysis of the Bernice Lake Power Plant natural as llows: s supply is . Carbon Dioxide -Trace Methane Nitrogen - Ethane 99.75% .24% .01% Propane - e Heat Value 1007 but/ft.3 following computer study (Pages 32-55) on ground level concentrations Bernice Lake Power Plant, incorporat Unit No.4, was performed by the General Electric Company's Technical Resources Operation. The most recent Alaska ambient air quality standards are included in General Electric study as gure XII. -31- Chugach Electric Bernice Lake Power Plant -1981 In 1978, we prepared an analysis of the short and long term ground level concentrations to be expected from the three units in existence at that time (a copy of that analysis is attached). We have now made a similar set of calculations for the Bernice Lake site based on the addition of a second MS5001P which is identical to the #3 machine in our original report, using the same inputs as before. We have presented the results in the same format as before. The machine parameters in the original Figure 1 are still valid, as ;s the wind data. Figure IVA shows the newly calculated short term profiles of ground level concentration no distance for four wind speeds, in terms of CO concentration. It will be noted that t~e fourth mac~ine has increased the maximum concentration from 2.2/"'/m to 2.6/'/m. The increase is not proportional to the number of machines because the greatest single concentration to the maximum comes from the #2 machine (l~estinghc:se Combined Cycle -Fig. 1) with the heat recovery steam generator. Fiqure VIlA is a re-calcu1ation of the downwind effects in terms of NOx, using a weighted average NOx emissio~ rate of 82.6 gpmv. The maximum at 20 m/sec has increased from 25.5 /Im to 35.3 r 1m . Figure V1IIA is an up-dated table of thp. U.S. Ambient Standards which also shows the current incremental allowances for "Prevention of Significant Deterioration" (PSD). Figure IXA shows the new set of contours, to which the appropriate coefficients in Figure XA apply. Except for the NOx, which has changed slightly because of the changed average emission level, these numbers are the same as in the original Figure X. It can be seen from Figure IXA that the increase in maximum annual concentrations is quite small. Ground level concentration during inversions and inversion break up was not calculated. Each inversion is unique and the results are strongly influenced by the nature of the inversion. The conclusion in the original analysis, that the total installation will have only a minor effect in terms of the ambient standards, appears to be st i 11 val i d . ,,~ j /Ii~~ R.J. Ketterer, Engineer Co~bustion Environmental Effects Isb 32- Bernice Lake Power Plant This report presents the short-term and annual average ground- level concentrations predicted for the Bernice Lake site including the projected #4 machine. Assumptions made for the purposes of these calculations are as fo 11 ows : 1. All machines are operating at base load. 2. No derating has been considered. 3. No anti-icing operation has been considered. 4. Ambient temperature is 35 0 F. (Hhich is the annual mean temperature for Anchorage) (Ref. 1) 5. Wind data is that for Anchorage, (Ref. 2) 6. Plume rise for each stack is independent of adjacent plumes. The Briggs plume rise equation was used; this calculation is well accepted and is valid for gas turbines. (Ref. 3, 4) 7. The site is a single source geographically. Because the stacks are physically separate, this interpretation leads to a small displacement of the location of some of the downwind concentrations; but the error is trivial, on the order of 0.1 km. 8. The Westinghouse machine is treated as operating with its heat recovery steam generator. 9~ Emission levels were considered to be the same from all three machines, except for the NOx. 10. No attempt has been made to evaluate the effect of temperature inversions. -33- 11. Stack wake effects and building downwash at high wind speeds have not been considered. Input Data The machine data used for both the short-term and long-term calculations are shown in Figure I; the data was either furnished by Chugach or was taken from General Electric files. The NOx value for the projected machine is taken from design data. The wind frequency data used is that for Anchorage, Alaska, obtained in STAR format from the National Climatic Center of the National Oceanic and Atmospheric Administration, and is identified as HDR 0372. Figure II presents this as a wind rose (in spider-web form). Short-Term Downwind Concentrations Figure III presents the short-term downwind ground level concentrations resulting from an emission level of ten parts per million of carbon monoxide for a range of wind speeds with a three minute averaginJ time. These are calculated by use of the Pasqui11 equation. (See Ref. 7) Figure IV presents the same data graphically. Values for other averaging times can be obtained by multiplying these numbers by the appropriate values from Figure V. Reference to Figure VI shows that the range of wind speeds covers all but about 9 hours per year. The values in Figure III can be converted to other gaseous species emitted at other levels. To obtain the downwind concentration of another gas, the values in the table are to be multiplied by the ratio of their molecular weights and by the ratio of the volumetric emission levels. As an example: in the case of N0 2 emitted at 82.6 ppmv, the concentration at 10 kms. downwind, for a wind speed of 10 m./sec., would be: -34- 3 46.01 .5/"" glm X 28.01 X 82.6 6 78 I 3 --,-0 = .j-' g m Using the NOx values shown in Figure I, a weighted average emission level of 82.6 ppmv (used in the example above) can be obtained. Figure VII shows a plot of the maximum downwind concentrations which this would give for various wind speeds, and the distances from the source which correspond to these maxima. (Summation of the downwind concentrations from each machine individually gives the same results). Figure VIII gives values for the primary and secondary Ambient Air Quality Standards. (Ref. 5, 6) Data derived from Figures III or VII may be compared with these values. Long-Term Downwind Concentrations Figure IX shows isopleths for annual arithmetic mean concentration distributed about the site, as calculated by the AQDM program of the U.S. Environmental Protection Agency. (Ref. 7,8) The contours are labelled with letters, ani numerical values may be ascribed to them by referring to Figure X; these values may then be compared to Figure VIII, also. The 82.6 ppmv value for NOx is, of course, the weighted emission level mentioned above. Ground level concentrations for pollutants or emission levels other than those shown in Figure X can be determined by applying the same emission correction as described for short-term values to the contour lines. Although· allowable increments under "Prevention of Significant Deterioration" regulations (PDS) may have to be considered, we have not shown these increments separately for the one new proposed machine (#4) because it is apparent from inspection of the maximum values for all four machines that even this total . poses no threat to the allowable increments. The ground level concentration shown in Figure XI is based on an emission rate of 10 ppmvd. The ground level concentration can be adjusted by multiplying by the ratio of actual -35- e~ission rate to 10 ppmvd. If the actual emission rate is less than 10 ppmvd, the ground level concentration will be far below the allowable PSD increment for S02 shown by Fig. XI. Conclusions In the absence of mountains, it appears from Figure IX and Figure II that the highest concentrations, long-term, are likely to occur north of the site; but even so, the quantitative values are likely to remain far below the ambient standards at any reasonable emission level values. If all machines are not operated simultaneously, this will further reduce the resultant concentrations. It must be understood that these conclusions refer only to the effects of the four machines; the concentrations which are attributable to them must be superimposed on whatever background levels exist at the site. The short term analysis is only for neutral stability. It is possible that stable conditions would present the worst case. We did not make any calculations for short term stable conditions wi~h or without elevated receptors. -36- R.J. Ketterer Combustion Environmental Effects Gas Turbine Engineering and Manufacturing Department General Electric Company REFERENCES 1) Local Climatological Data -Annual Summary 'tvith Comparative Data -Environmental Data Service, National Oceanic and Atmosphere Administration 2) National Climatic Service, National Oceanic and Atmosphere Admin- istration 3) G. f. .• Briggs, :r1'::;lme ~ise, U.S. Atomic Energy Commission, 1969 If) D. P. Hoult, S. R. OIlDea,. G. L. Touchton, and R. J. Ketterer, Turhulent Plume in a Turbulent Cross Flow: Comparison of Wind ----------' --Tunnel Teses with Field Ob~e~vation, Air Pollution Contra iissocia'tiOl~;' "13'08 EO~;~-June, 197:;, paper 1ft 5·· tJ·9. 1 5) Code of Federal Regulations, Title 40, Part 50 G) Alaska Administrative Code 18 A/\e 50.020 7) D. 11. Turner, l'L9T\~_Q.0}:: __ _ Environmental Protection Agency, tion !\P-26 f;) kn: (lllDJit D:i~: {j)i~ 189 94 -37- eric Dispersion Estimates, U,S. OTlIceo}C-Arr-Progr~lrilS Vl.lbl~ca- <IGURE if: - I II III IV V VI VII VIII IX X XI IVA IVB LIST OF FIGURES TITLE PAGE Input Parameters for Bernice Lake 39 Anchorage Wind Rose 40 Short Term Ground Level Concentration 41 Plot of Short-Term Ground Level Concentration 42 Averaging Time Correction 43 Probability of Wind Speeds for Anchorage 44 i'1aximum Ground Level Concentrations NO X and Corresponding Distances 45 Nat 1 Ambient Air Quality Standards 46 Plot of Annual Ground Level Concentrations 47 Concentration Values Ground Level Concentration Isopleths 48 Allowable Increment vs. Ground Level Concentration 49 Total Downwind Ground 1 Concentrations vs. Downwind Distance at Various Wind eeds for Stabili Comparison 54 Total Downwind Ground Level Concentrations vs. Downwind Distance at Various Wind Speeds -38- 55 ~HUGACH ELECTRIC ASSOCIATh,.j BERNICE LAKE STATION MACHINE OPERATING AND EMISSION DATA Machine ~!: Manufacturer Model 1ft Turbine 1ft Exhaust Temp., of (OK) Stack Height, ft. (m.) Stack Exit, ft. (m.) Stack Equivalent Diameter, ft. (m.) Stazk ArZa, ft. (m.) 41 of Stacks per Machine Exhaust Mass Flow, lbs/sec. (g./sec.) Stack Exit Veloc- ity, m./sec. Fuel Consumption, Std. cu.ft./sec. (LHV) (gas-fired) Emission Rate , tons/day (g./sec.) @ 10 ppmv CO NO x level, ppmv S02 level Particulate level 1 2 General Electric Westinghouse MS 5001 M W 101 G (with heat recovery steam gener- ator 214378 947.6 (781.77) 24'2" (7.366) 8 x 10 (2.438 x 3.048) 10.09 (3.076) 80 (7,432) 1 224.65 (101,901) 30.333 82.07 .0937 (.984) 84.9 Negligible Negligible -39- 311 (428.1) 50' (15.24) 7.5 dia. (2.286) 7.5 (2.286) 44.179 (4.104) 1 138.06 (62,624) 18.484 50.43 .576 (.605) 50 Negligible Negligible 3 and 4 Existing and Proposed General El ectri c 14S 5001 P 908 (759.77) 35'4" (10.768) 12.5 x 10.25 (3.81 x 3.124) 12.76 (3.89) 128.125 (11.903) 1 257.777 (116,928) 21.121 91.62 .1076 (1.129) 90.3 Negligible Negligible FIGURE I GRS TURBINE ENGINEERING WIND ROSE PLOT RNCHORAGE 65-69, RNNURL TOTAL OF RLL ~IND STABILITY CLRSSES I------------ll.,..---J.,------i'----_+_~ .:=--t--..:,>---~---------Efj:;T ~~-#-----rALM FREQUENCY SCALE +-1 ___ +--__ -+-__ -+ o.oocoo ANCHORAGE WIND ROSE 1965-1969 -40- .0$110 .10220 .1~ FIGURE II SHORT TERM DOWNWIND GROUND LEVEL CONCENTRATIONS BERNICE LAKE, FOUR MACHINES ~ g/m 3 3 MINUTE AVERAGE EMISSION: 10 PPMV CO B,\SE LOAD, 35 0 F STABILITY D DOWNWIND WIND SPEED DISTANCE (kilometers) sec 10m/sec sec 20m/sec .5 .3 .8 1.0 .7 1 .5 2.1 1.5 .1 1 . 1 1.7 2.5 2.0 .2 1.1 1.8 2.6 2.5 .4 1.2 1.9 2.5 3.0 .5 1.2 1.9 2.3 3.5 .5 1.2 .1.8 2.0 4.0 .5 1.2 1.7 1.8 4.5 .5 1.2 1.7 1 .7 5.0 .5 1.1 1.5 1.5 5.5 .5 1.1 1.4 1.3 ..., 6.0 .5 1.0 1.3 1.3 6.5 .5 1.1 1 .2 1.1 7.0 .4 1.1 1.2 1 . 1 7.5 .4 1.0 1.1 .9 8.0 .4 1 .0 1.0 .9 10. .5 .8 .8 .7 12. .5 .8 .7 .5 14. .5 .6 .5 .5 16. .5 .5 .5 .4 18. .5 .5 .4 .4 20. .5 .4 .4 .3 25. .4 .4 .3 .3 30. .4 .4 .2 .1 FI GURE II I -41- , .j> N , a::: UJ t-w ::z:: ( O:~ l.m-..... -H++.~4+-I~ 'f-~ ~ i ri-r.;.. -l-I/ --,I I II! ' u -, 1---; : J ---- - -' UJ > UJ ." -I ..... G'> Cl c: :z: ::0 => IT1 0 a::: ....... c:I ,< t+t+H1rl+H+-H+H-l-+it-t-H+H++++++-+-H-H ++H1 H+++l+i 1--1--1-4-4-+-1-1. " -, I I ,-1---: r ' 1- 1\ ~ .-_ I I' j.. ~ -1\ II -. : i : I i- l ,~i ~ -~ ! I; II' . I~ I ['<I~ Ii +t+t-I--HI--+ ' . I'i i" 1-----~ N--, 1- 5 OOWN~HNO DISTANCE) KI Lot1ETERS -I I' - ] • ~ I 1 -\ 1 i ;. --i , : 6 i I 0 ,~O IC f . .L k'. VARIATION OF CALCULATED CONCENTRATION SAMPLING TIHE 3 MINUTES 15 MINUTES 1.HOUR 3 HOURS 24 HOURS WITH SAMPLING TIME RATIO OF CALCULATED CONCENTRATION TO 3 MIN. CONCENTRATION 1.00 .82 .61 .51 .36 FROM D.B. TURNER, "WORKBOOK OF ATMOSPHERIC DISPERSION ESTIMATES" FIGURE V -43- .-~--"""'> V /1 ~ rv (tIl ~fIJ ilL {imp; J UV7 rJJ J R ~ U{h}'TY S7f)iVD8f!.IJS ( , l: .' . I. ! 1 j I '1 .1 i ! ill : ,i .. ---.'- , , 1 ; !! I' • I • I : ' ~ , . 1 . I • I ~~ ... -:.-.~+ . , .!.J Z!W .. ., I ; ". W 01'1-:: .;~:: ~ :::. ........ W-.J6.\ih-i1- WI-:::::· , . ..J~u:. '. __ .,~b~ ___ ~. iZ zen ... I ::::>1..<.1 :::> .' . ouu .. 1. -.lo::z ....... . , , . , 1~8Ii~ ... _.J ~ ~ ~-+--'-'--t '1-1 Z 0 :x 0:: . I , . i< U , ..... --.;;1;; tr-::r: . , l . " 1 II I " "I . : ) I 11 , , ,I, ' c ( ... .. - .. ....... ---+--l--l----+--+--~~·+_ ,-+---1---1---1 . .-- , c: x: L-J Z c:: >- IT -.J 0... (j") o >- f- ....J IT :::l o 0: IT l.LJ U Z l.LJ a: L..J LL u....: c:: o 0: ~ rl eC'RIr CLL i, ___ , BERNICE LRKE, 4 MRCH Ii'JES § ~~i~I--~--~~~~--~~----~~~~~~--------------~ I II §, ~l ~J ~I i §! o~ : ."""' "' I § ~+-__ ~~ __ ~L-__ ~ __ ~~~~-L-L~~~ ____ ~ ____ ~ __ ~ '-25.000 -20.000 -15.000 -10.000 -5.000 0.000 5.000 10.000 15.000 20.= 25.= GRID REFERENCE (KMJ IS~PLETHS IN MICR~GRRMS/CUBIC METER PLOT OF ANNUAL GROUND LEVEL CONCENTRATIONS FIGURE IX -47- RJK - CONTOUR LINE VALUES FOR LONG TER~1 ISOPLETHS (SEE FIGURE IXA) CO S02 S02 NO CONTOUR AT AT AT AT x LINE 10 PPMV 10 PPMV 100 PPMV 82.6 PPMV A .005 Jl'lm 3 .011 JA 1m 3 .114 rlm3 .068 rlm3 B .010 .023 .229 .136 C .015 .034 .343 .204 FIGURE X -48- ANNUAL 24 hr. 3 hr. ALLOWABLE INCREMENT ALLOWABLE PSD CLASS II I NCRn1ENT LEVE LS VS. TOTAL EMISSION FOR 10 PPM S02 20 9/m3 91 512 FI GURE XI -49- CALCULATED TOTAL r~AXI MUM GROUND LEVEL CONCENTRA TI ON 0.41 2.1 3.0 . 3 g/m SU?PLEMENT TO GROUND LEVEL CONCENTRt\TION STUDY FOR BERNICE LAKE SITE CHUGACH ELECTRIC ASSOC ION NOVEMBER 23, 1976 -50- I. Short Ter~ Downwind Concentrations Additional analysis has been requested on the effect of greater or less atmospheric stability on maximum downwind concentrations, and on the effect of a 75 0 F ambient temp- erature instead of the 35 0 F which was the original premise. Figure IV-A presents curves for a 5 m./sec. wind at Stability B (very unstable) and Stability E (stable). These curves are here superimposed on Figure IV of the original report for comparison. It can be seen that ei~her variation from the Class D (neutral) case increases the downwind maximum concentra- tion by about twice, but not to the levels shown by higher wind speeds at Stability D. The position of the maxima shifts some- what, and comes closer to the source for a less stable a~mos­ phere. No calculation of high wind speeds at Class B and Class E was done because such speeds do not occur under these conditions. The Class E case can occur up to 30% of the time; the total of all unstable cases at Anchorage is 16.9% (for Class Band C; Class A seldom occurs). The effect of a 75 0 F ambient temperature was calculated by making appropriate corrections not only to the atmospheric temperature, but also to the mass flow rates and exhau3t temp- eratures of the individual machines. Figure IV-B sho~s the ensuing concentration vs. distance curves, and can be compared directly to Figure IV or IV-A. The increase in maximum concen- trations is on the order of 10% for each of the four wind speeds, but the positions of the maxima change very little. This can -51- -2- also be seen from Figure VII, where se 7 F results have been translated into terms of NO x concentration maxima and distances vs. wind speed. II. Conclusion It can concluded that ambient teD er to be a matter of concern. The effect ~ is not likely er atmosphe!"ic stab ities is a little more pronounced, but not enough to change the e of concentration values under consideration. -52- (. .~ { '( ') t/ .! { "f ~ e t:'.rlitt:..~ I..vfre $ ,. t:-<!!. .. 10 Scale 1: 1.000.000 5 o 10 20 30 40 50 60 70 80 lO 0 10 20 JO 5_0===6:E0====7;cO===8l:0~ 9~0===1J:0",0===:;;;_131=-0==1:::J~ tilfH..RH~:;:==:::::J~===='C==:--C::l::;::U ~O ~~' 50 ;;0 ]0 5 0 =~~~~~========~~====~~~======~~======:a=======~~==:-1::i:H::~-'., =r _ [ l' , LAMBERT CONFORMAL CONIC PROJECTION -53-STANDARD PARALLELS 60"0' NAND 0"20' N H <: I > ( ( ( DOWi\TWIND DTSTANCE, KILOM1~TERS ~ r~ f-< w ):: (.) H 00 :=> (.) ....... (/) ):: ~ t!J 1 0 : V1 ~ ; V1 (.) IH ""1 H (j) c: :::0 M H <: I w ):: ( c ( _r-,--,r'-"~:~;~I-'~i~~:~;,~,.~Ir-I~~I~_~:,~-,V~·'_~1 ,-,~i~i-'~'~I-,~--,-,.~·-;~-,~~ .. ~--~~r--~--:. .. ~--~;;~--,,'-.. ',~;-I~':-··--~·~~~·-·~~ ; ': I '4f"O t 'D ;';'J,:hN: '1re E'fr.,· : Ii"" " '.. , T"TI .... t '. 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CUR1r~" I I I: I, I,,' W :ND I ff.;;~lEOO: .. :J ,'" : II ·-:-.--+-----+-~+---t-+-It~~~~~~~~~~~t+ "I;~ I I ~~~, I ;: ~ .;.;-t--)) Till ;: A ;;:: I 1,:1 ~ :J\~ Sleb:.'.: .. ,. : I ~: <;! I J' I : I " ~ I,. 'I ,;-.~, "1' ~ ~'B _~L 'H: r-"-0 'fit s\eb'.' ;, ,.., .. ,. :1.1. , ,~.Ii . . "1\ ' rfiFlt E : Bt RN. Ct, J AKJ :t N tl g , I. I I I j I I" I... i , • I !'" ! I I 1 I 1 "j I I • , ,C ,i:, I I, , ; , I ;;:) ,J II $ ep,., :! .,. ',I I " I I J ' , , : b ' i, II i I I I". i ~ b .r I 'J S er!.i :.: .,. : Iii ' , IJ I , , I, " 1. c; ;. . i" f' i l' ., r' ,'r H ; II " I : ,! ' I"': :, 1 ", . .• ,I,. ,', ! ~ ----1--1-----~ --,--~ , :::; i t lj' ::;: ; : I : , : IJJ:~l'~ , : : :;:: : : I : .) I', ,,: :' Ii I ., '~ , • j ; ll' i j, I: : I i j' ,:;. : I. !' I, l, I I ! J I I ~ t i' II I :! . I I,'., I I: ~; I I I: I! i I I I:, _ ... ~-....... . I >I :; : ~: I .-:.:' I ~ i I: I : I .~ -, , , I ';-;T: +-;-j i ~:~; '-:-~. ';-; ! ~. ~/, I .. .. .... i' ,. ~ _... -.--:-~-....... , ,~.~ -.....-f·· --... I , ; I • I, I ' I I I I : I ; I . "I ' , I ' : I '! I I' I ..... ,.. I Ii"" I I· , ; , , "1' I ,. "': I • I ' " I"t,~' " ',;' :::: :,:. :::: ': : 1.r : .,', I~., I.il I I, • I". I , I,' :1 .,\ j,! I I j Ii, ! r :. l-:------rj :::: :':, .:: ! : i, " ..' : " :, ': : /.:. ' : f : I r\ .t .. " : : ; .-.. ---.--'---.. ,--' .• 1-----I. _.... ., .. --. I -: ,., 1\\1\ " .. ~;':: ;~~~ +-r' .: I " " ' , i , , . II : I A"l.--I-,,,,~ 1\" \ ., . . . 5 ........... --1-' ....... ' ~ .. /-'--1-'--'--'+--+-1'-+ .-1" ~ -f------.'-+--,-, .~.c...i ~~_-I----+--h' f--I--,.. .. --....-L ~. ---I ~ .-~~R~~ , : " I I , :::: I :: ::;' ,I' , i I. "; : ; : I i ~ T-\J''t : : : '. "" , li:1 ~Wrll ,I i ilJILi :.i,,\il! Ij~Jil I,(lli,; ,{ 1,1. l;lJt V /~ __ ~";....LI'J.· 1_ ; 'i .. i '. : ,; ! ill,;,! :~~~ 11:.: .~. !,; .:, " vs; -Ilrmln~·r. ~W~1\~~~' ~D-O~)~J' =S'1'~rj~~t~(lrl=i' -i-1-. 1 2 5 10 20 30 DOWNWIND DISTANCE, KILOMETERS L· ... " . ,.' ~ff0ctivcl May 4. 1080 Re'lis:::er 7·1. July 1980 18 hAC 50.010 18 MC 50.020 TI'1'Lt:: 18. ENVIHOI-WJ-:tlTAl. CO:'iSI:nV:,j'ION CI!I,PTER 50. Al R QUALITY CONT!10L. Section 010. "'i"plicabili ty cf loc;:>l 90vcl'nm"nt rC'Jul.ltjo."lS 0::0. I\~)ient air quality stanc.:1~-d!; 021. Stnte air qu~liLy cla5sificaticns 030_ Open burning O~O. Incinerators GSO. InrJustrial proc.:usscs and fuel but'niny cquipmeflt OGO. Pulp mi 11 s 070. ~otor vehicle cmissio~s O~O. Ice fog li~it~tions 100. Marin~ vcssuls 110. Air pollution vrohlbitcd 18 Al.e SQ.OlO. {,PP1.ICf.!1I LlTY OF LOClu. GOVt;P.N~lLNT IlEGULA'l'IONS. A local ail' qu.:tli ty cOlltl~ol ... l.gCf:CY lliay establish the ~~~"0 or HiOl:e stringent: rcgul.ltiol1s, but not: l~ss 5t,rin<::cnt regulations, as th~ applicable regula- tions specifi"d it< this ch"ptcr. (I~ff. 5/26/72. Reg. 42) i;UTliOrnTY: AS 46.03.020{10l Ull AS 46.03.140 (ct) The air quality r::ust be ;n~1int~l.:1t!d Clt tt:e low~st p.t:'<lclicablc concentrationa of air cont~tminants. In nO 0Vl?nt may U)t::!.h" concentrations, corrected to !itan;;ii~rd co:!(llt.ion:-;. 0xc\.~I'd thl.! followirHJ: Ud onnuaL geometric mean: 60 microgr.:lHlS per cU!"Jic meter; (!3) 2'l-Lo\.:r ilVC:t'tiy<: not to be exceeded mon'; often thdn onca 0~l:(..:h Ye .. 1:::: lSQ miClchJt-,::tm:; p,-::r CW)tc fnctcrj ell} 2;I-hoUl" <lv\.~L.J9C' nut to be cxcccucd Inore often th.ln Ol~ce c2tch '/eo!:: J·:,5 mi cr(){J:-dlr.S rF!r cut.:ic meter; (t') thrct.! ~hOUl" ,:-tVel: .. '~JC flat: Lo DC Gi':u.:eded mon.! Oft"CT1 LhilO once cd\.'!1 )',-'':\!: 1300 )\:1 cru(Jt.;Jll:; ret cubic mc-t.t:.r; Figure XII -56 ;~~C"" .-.. , . ,.,', Regist.er 74. July 1980 HI Me 50.020 !';NV 1 HONNDITM. COl IS EP.VATlOtl 02',onc olle-honr _1v(>ra'l" not to be exceeded marc often th'lrl Once each 235 mict·OiJ!:ilfO:i per cul}ic l!1ctI:r; (5) nitrogen dioxide lU1uutil a::ith.";'l~tic m€;nn: 100 micrograms per cubic meter; (GJ CCdllCt,"'U sul fur cotnpounc1s 3D-minute average not to be exceeded more of ton than once each year: 50 microgr~ms per cubic meter expressed as 502 P) lead qlnrterly aritilme>'tlc mean: 1. 5 microyrams per cubic meter. (b) In arens whore> ~ir.quality is better than the standards specified in (J) of this section, it must be maintained b\~low those stanrL:.lrds, and the incrc~5c jn ~ir cont~rnir\a:lt conccntratioll ~hovc the h~sDlinc conccntra- I; iOIl ilt.)i' not.: L'xct.:cd: ( 1) [or a C1.1SS I a teoil (A) suspended particulate matter (ii) 24-hour avorage not to be exceeded more than onCf':: e.2\C~l y.::.:u:: 10 microgra.!l"s per cubic metar; (!l) sulfur dioxide Ii) (i",' 2·i-huu.r ~l\.'t.!1·',i;y~ net to Ut.; exceeded mCtI:"(! often t!)an Olll-'t: t~..JLh )'t".:JC: fiVt~ mlCI"O'lt'dlllS PCl: cuuic mctf'r; (ili) lhJ1.':e--):Dlll· th"XJ!llUm not. to be c;;'ccf;d{:u more often than on<":i~ c.,"H":!\ Yl.! .. H"; 25 micn)yr.a:ns 1-1ec cubic meter; (2) fue ~ Class II ~r~a {A} particulate ~3ttcr (ii) J4-h.;'"Ju:r.-avctilfJU not to be e}:cecded more oftQn than on(;t~ 1.. ...... "I.ch j't:',.lr: 37 miCl.'OI.;it'.:.J.r:\S pf.:r cubic mct0.r.; Figure XII (Continued) -57- ./ ". Register 74, July 1960 1£3 Me SO.020 (0) su.' [U1' dioxide mct\.!r; Iii) 24-hour average not to be exceeded more ot.tOll Lilan once each year: 91 micrograms per cu~ic meter: (iii) three-hour average not to be exceeded more often th~1n ence c~ch year: 512 r.licrograms per cubic meter; (3) fot'') Cbss 11 1 cHca (A) particulate matter (i) ~nnu.,)l gc!ometric mean: )1 I:l\crogrurns pee ,.:uhic m!!tcr: (ii) 24-1~ur Jver~yc not to b~ exceeded mOfe often than once <!ach ye.3r; 75 microg.::-a.::l$ per cubic meter; (ll) "uifuf dioxide 1t1ctcc; (ii) 24-hour avcra'le not to be exceeded more often than once each i't~ur: lD2 microqr~1Jns per cubic lHf~ter: (iii) three-hour aVer.)ge not to be cKc2eded mere: of ten than once ~ach year: 700 n\icrO'lrarns per t:ubic meter. ([,:Of. 5/2G/72. nee;. 42: all' 0./8/7·1, Heg. 50; ~'n 5/01/80 1-\"9. 74) 1I11TItOI!\ ;"/, liS ·1('.03.010 lU ,\';C 50.021. STNn; Mil QllM.I·;·Y Cl.ASS I F1 CIITl()!;;;. J\S ·lG.OJ.CJ20[lOl (r,) />s '16.03.140 (ill For purposes of clu!Ssir'ling ar<..:as .lcC'ordin9 'to air qualitYI thOSt;; a!.'L!a$ in nonatt.-:linmcnt \o.'ith the ar;'cien::. air quality stand .. 1rdg in sec. 20 (i) of thi5 ch.Jpter arc; (1) ;\f)Chor':'HJe 1..lrb.'\!\ i1!:ea for, carbon monoxide only; I"Jn..1 (2) F·a.irbolr.1:E.: and NOt'lh Pole, urb .. lll .:.JrC~1:"; for cacbun monoxide only. 1\ COflti,lctc description of these baund3ries is found in secs. 111-6.0 and 111-7.11 of vol. III DC th{; State /'.lr QUulity Contl"ol Plan t!,:n.:cd Jilnuary '19BO. \."hich is on file i~ th0 Offic~ or tIle Li~ut0n~n~ C;ov~rllor, and wh~ch is in~orpora~ed by ~e!~~rellC~ illto this ch~!'tcr by seC. 620 of this ctl~l)t~r. (b) For PUt·l'l>:'(>~ t)f the .:,wu')lL'nt .1ir quality ~H:<..1n<i':ln.b;; 5p(!ci fL:;d in ~\:c. 20(b) or t:hl.s CLdi)t(~r! Figure XII (Continued) -58 - 113 1'.\C :;0.0)0 ENV I PON:·',Et'JT;\L COU:::ERV,1\';'ION (U) Ih:i"ltHJ Sl'd ;'LltiuT1dl WiJdlifr.' HefIHJc; (e) Sim~ono[ N~tional WildliCQ Rcf~Je, and (D} Tuxedni ~l,ltion<ll Hi ldl.i fl~ P.cfu(jc; ('~1 til()~;I~ "lrl'LiS of thc: !;t'It.C not LIs;'} fi.ed in {td. (b) {l) or {b) ()) tJf Uti:,; :;t;CliI.Jil dre (,..'L1D:;l.fied .lS Cl..l~;:'; ll: .:Jnd (3) (£1'(. 5/-1/00, 1"':;'1. 7·1) /lUTIIOH1TY: Afj ·1i).03.010 1\5 4(,. OJ. 020 (10) iA) AS 4&.03.1,0 liS ·16.03.150 1Q ;\l\C SO.l))O. OF't:N BUHNING. (a) Open but"uiny is per!':'iissible if m,:nd.murn cOI:\Oustio:1 efftcicncy is maintai:1ed throughout the burning pC'''iod~ P(~n~ds~~iblc: op(:n bucninrJ is sulJ.i\",:ct to t'.h(~ cKccption in Cd) of this scction# th~ limit..:tt.iotl!.; in {LJ}.~ (c) .md Cf:) oi lIti~, sf'!cLi0f,. ,lilt.! !..lee. 110 Qf thi~ chapt(.;r~ (b) Open burnin9 o( a~phtllt.St ruhbt~r proGucts, pl;).stics, tars, oils, oily \.;.:l:;i:<:-S. cont,w'l.naLL:d oil cleanup m.:\tcriI11s,~ or otta~r mw.terials in .] m.ll\rot~r ...... hi.::..:h lJiv.:!s off bli1ck HIr.Ot:e is prohiblted unless prio!'· ',..:ritten .. JlJprov~d. is obt ..... lillCd from thl.,: c1cp:lrtmcnt. Authority to gr.lnt this ap?:oval ~jll. in the Je~)~rtmentI5 duscr0~ion, be delegated to a local air pollution cOJ'';t:rol '-"jnncy for ;lctivitic5 ",jthin its jur:i~;di(..'li()n. "flY appro·"C'u open bt;rnit)(J i~) ~~ubjl..':ct to tlh1 [olloh'ing .lilllit':ltioll~: (II con~rclled fires for the purrOR~ of tr~ininy fire fighting pL"·r~;on:H:l mu: .. t DC' ,ldvertt:;cd th[OU~fh nC-"'-I;:; II1clliw, jn the generCil Vicinity uf dH: I.).cli·.r ll:y ut l,.:~\!Jt thrc,~ dill'S before the activity, informing the qenerdl i=-'..:bl it.: C.$ to tile tim(', pl.=!ce und purpor,e of tht: fire; (~:} Opcn l:urninq u( liquid h'irJroc,)t"bo1i:'; pr"odue'cd i-1urir.q oil \It' q.t:; w\:tt (l{n~ It!;.!,'; <""111 Lt, dl'PI:()vl.:d ()H:j'.it U;f;:'e ;,(e nU P(<lct..i\~'~d)lL! Hl\.'.\ns ;lV,I; L-_\1d(~ to r c:c)'<....'lc. n:.:u~::n. or dlSr;OSC of t1l0 fluid;; i:l "i :r',orc (!:~\I~r(~' ut'h.::.r.a.l1y ~lccl,:pt,::~'Dlc 111.-lr::h:C; and (J) 11·.!~·,ni\.lll;': Pf'1,:-,:dulC.r:; ilnd r(.'qui;:('II\l.:n~.:3 wlJl be C:~~t: .. d:,J.ishj.;d to ;;d.niml..'-:\~ <ld'':l:l·S'..~ l~nvi.con:;l!.::nd.l ...:-rfect~ i'lnd U!~ .)I\,o\,\nt. of ~:Ir.or"0 generated. ("'.') iJi)4::l !J\IL~ll~ri'j "f pliLrj~:;ciblt .. : iJtll."t..-:l(jl_' • .:1f\twal C,).fCi.l.SSeS, ot:' PC\-l'l)l~;wil-!"t!>I:,t iI\.\L,·J.J,ll:; 1:; ;"'l(JhLbit.f!d if' it (:,iU;:';I:S odor or blilcY. ::mo(:(2 \.,.Li,.:h !';d .. dli .jd':._:r';\~ t'! (l.!(;t Ull )lI..!,!!])Y p\.:::::;on:; ,)t" l"t....'~.it~(;nC(:~i. (<1) Co:-. t!'0ll0t.t ~.H.trninCJ :c~ t:--:.<2. m,Hh1g~rncr, \: uf furnst land; vCtjcta ti vc cov ... :t". fl~;!p:t·ll:;'. (11.-'~i 1£111 (\..~ h.dJlt,lt, dth(;t til,-II) hunl~n'J to t~c:~ .. tt"ic~: or culrJ;.lL .... .1 IId\_~!l.~·~ 1 ..... ll,l~·l.::t;. rv'.~u.~i:C;j. prL\)1' wrlLt~n .lfJprnv;.ll (ro!ji the {PI (fiJi rl Lllr;;jl""1 i~: pruhihitl~d if ,'If\ air ;iUd1ity ':Hlvlsory by tht-: .J"jl.ll (IU'.';!! l:1 Lrp,lIk.l:.! (lrl d 1',ld\o 01' Lf.'l,:.:\ti~;iolt ~;l<Jt it)!1 iii ;lll ~1I'l:a $'.uL~)I\j l.h,-.r. L\,.:rl.l!l(j i:-.> IH..H pel.·I;\ittCd tot' lhat day, This .:ldVl!:ory \,,:il1 Figure XII (Continued) -59- PART VII -CORRESPONDENCE ( Local or other representatives of llowing agencies have been contacted to solicit the ies' comments, if any, r arding the proposed projects: 1. U.S. Army Corps of Eng ers 2. U.S. Environmental Protection Agency J. U.S. Fish and Wildlife S e 4. U.S. Soil Conservation S ce 5. Alaska Department of Environmental Conservation 6. Alaska Department of Fish and Game 7. Alaska Office of History and Archeolo8Y 8. Cook Inlet Region, Inc. Copies of all the above letters are included in Part VII llowing. All written responses to the letters and any other written communications, will be promptly forwarded to REA. Written summaries of other major verbal contacts regarding the projects also will be provided to REA. Also included in Part VII is a copy of the ~orrower's notice -to be run as both a 1 1 notice and as a display advertisement in area newspapers as required by Section . B.l. of Bulletin 20-21, Part One. In compliance with XXI.B.2. of the same part, comments received and Chugach's recommendations. r ing those comments 1;,]111 be prompt ly forwarded to REA. Proof-of publication affidavits on the newspaper notices also will be forwarded to REA as soon as they are received. Signed: '....., -60- ,.., ELECTRIC ASSOCIATION. INC. P,O,BOX3518 • v4"cl\ohoge. v4Qos~a 99501 • PHONE: 907276·3500 August 28, 1981 Department of the Army Alaska District -Corps of Engineers Box 7002 Anchorage, Alaska 99510 ATTN: Regulatory Functions Branch Dear Sir: TELEX: Chugach AHG (090) 25 265 Chugach Electric Association, Inc. (Chugach), is in the process of preparing a loan application to the Rural Electrification Administration (REA) for generation facilities improvements at two existing pmver plants. The improvements are needed on a priority basis to ensure adequate generation capacit:l and reliability for the coming winter's peak electrical demand period. The projects are as follows: 1. Ins tal,la tion of a 26-megawa tt combus tion turbine generation unit, to be fired by natural gas with light distillate oil as back-up fuel, at Bernice Lake Power Plant on the North Kenai Road approximately 10 miles northwest the City of Kenai. 2. Installation of oil storage facilities, including two 54,800-barrel tanks, at Beluga Station, located approximately 40 air miles west of and across Cook Inlet from Anchorage. The storage facilities will permit the stockpiling of light distillate for use as supplemental fuel in the event of a 'shortage or disruption of primary natur9l gas generation fuel. Each of the above projects will be constructed on the existing respective ulant site and there should be virtually no impact on wildlife. Neither project will require any new water source and nei ther proj eC t will discharge '<;va ter or other subs tance into any stream or other water body. Department of the Army -2-August 28, 1981 Under REA regulations, neither of the projects should require an environmental impact statement. A copy of the Borrower's Environ- mental Report, prepared for REA by Chugach, is enclosed. Chugach would appreciate your comments, if any, on the proposed projects at your earliest convenience, due to the projects' importance and the time frames involved. If Chugach has not heard from your agency within thirty days, it will be assumed you have no major objections to the projects. If you have any questions or need additional information, please contact me or Mr. Eric Haemer at 276-3500. Very truly yours, / /" ,,-: A /t/ " , (j ".' /;,,"/ I ... /4&~--: D,/,{l1-:.--<' ""1' 'V, ' ;;/ Lawrence D. Markley Executive Assistant Environmental & Public Affairs LDM:cls /1 ELECTRIC ASSOCIATION. INC. PO.BOX3518 • JI'lCho,;age. JQag~a 99501 • PHONE: 907275-3500 August 28, 1981 U.S. Environmental Protection Agency 1200 Sixth Avenue Seattle, Washington 98101 ATTN: Permits Section Dear S s: TELEX: Chugacn :'.>4G (090) 25 265 Chugach Electric Association, Inc. (Chugach), is in the process of preparing a loan application to the Rural Electrification Administration (REA) for generation facilities improvements at two existing power plants. The improvements are needed on a priority basis to ensure adequate generation capacity and reliability for the coming winter's peak electrical demand period. The projects are as fo~lows: 1. Installation of a 26-megawatt corr,bustion turbine generation unit, to be fired by natural ~as with light distillate oil as back-up fuel, at Bernice Lake Power Plant on the North Kenai Road approximately 10 miles northwest of the City of Kenai. Unit No.4 11 be operated as a peaking unit only. 2. Installation of oil storage facilities, including two 54,800-barrel tanks, at Beluga station, located approximately 40 air miles west of and across Cook Inlet from Anchorage. The storage facilities will permit the stockpiling of light distillate for use as supple- mental fuel in the event of a shortage or disruption of the primary natural gas generation fuel. Only Beluga Units 1 and 2 -rated at 14 megawatts each - will be modified for such dual-firing capability. U.S. Environmental Protection Agency -2-August 28, 1981 For each of the above projects, Chugach hereby requests: (1) Exemption from review under Prevention of Significant Deterioration (PSD) regu- lations, on the grounds that neither power plant --located approximately 30 miles apart, across Cook Inlet from each other -- will emit more than 250 tons per year of any polluant regulated by the U.S. Environ- mental Protection Agency (EPA), or will exceed individual -unit emissions limita- tions for various pollutants. (2) Waiver of the New Source Performance Standards (NSPS), performance test requirements. Such waiver may be granted under 40 CFR Section 60.86 (b), if the owner or operator of a source can demonstrate "to the Administrator's satisfaction that the affected facility is in compliance with the standard.1! (3) EPA's comments on the proposed projects, pursuant to REA Environmental Bulletin 20-21:320-21. Under REA regulations, neither of the projects should require an environmental impact statement. REA will review the Borrower's Environmental Report (BER) , prepared by Chugach, and then most likely prepare its own environ- mental analysis. Two copies of the BER are enclosed. It should be noted that Part VI-Air of the BER contains a short- and long term ground level concentrations analys for Bernice Lake Power Plant including unit 4. A similar analysis for Beluga Station with Units 1 and 2 on distillate has not yet been completed by General Electric Company's Technical Resources Operation. That analysis will be forwarded as soon as it is received. In general, it should be stre~sed that the primary generation fuel for both Bernice Lake Power Plant and Beluga Station is natural gas. Distillat~ is, or planned to be, stockpiled only for use for very short periods of time --during extreme system peaks or in the event of a disruption or shortage of natural gas. This is explained more fully throughout pages 1-18 in the BER. U.S. Environmental Protection Agency -3-August 28, 1981 It should also be noted that Chugach is concurrently applying to the Alaska Department of Environmental Conservation (DEC) for air quality permits to operate Bernice Lake Unit 4 as a peaking unit and to operate Beluga Units 1 and 2 on distillate if necessary. I have been in contact with Mr. Tom Chapple of DEC regarding those applications, and am providing him with a copy of this EPA filing. With respect to the Bernice Lake PSD and NSPS requests, one copy each of the following materials enclosed: 1. The BER 2. Manufacturer's specifications for Unit No.4. 3. A description of the NOx control system. 4. A letter from the manufacturer citing NOx emission quantities from Unit No. 4 individually and from the entire Bernice Lake Power Plant with Unit No.4 operating. Chugach hereby affirms that it will operate Bernice Lake Power Plant in accordance \,vi th this data, and that 2bnual plant emissions of NOx or any other pollutant will not exceed 250 tons per year. 5. A copy of an emissions compliance test of a General Electric gas turbine (virtually identical to Bernice Lake Unit No.4) demonstrating compliance with NOx emission 1 ts using distillate fuel, with a verification cover tter from the manu- facturer. Bernice Lake Unit No.3, also virtually identical to the tested unit and to Unit 4, received an NSPS performance test waiver --based in large part on these same test results --from EPA on January , 1981. Unit 4 will use the same water-to-1 ratio as Unit 3 and the tested unit. 6. An analysis of the natural gas fuel used at Bernice Lake Power Plant. U.S. Environmental Protection Agency -4-August 28, 1981 With respect to the proposed dual-firing modification of Beluga Station Units 1 and 2, one copy each of the following materials is enclosed: 1. The BER 2. Manufacturer's specifications for Units 1 and 2 (which are identical units). 3. A letter from the manufacturer citing pollutant emission quantities for Units 1 and 2 using distillate, and for the entire plant with Units 1 and 2 on distillate. Chugach hereby affirms that the plant will be operated in such a manner that emissions of NOx or any other pollutant will not exceed 250 tons per year. 4. A copy of an emissions test of a General Electric combustion turbine virtually identical to Beluga Units 1 and 2 using distillate, with a verification cover letter from the manufacturer. Although Chugach is aware that decisions on these requests in all likelihood cannot be made within 30 days, Chugach would appreciate your comments within that period. This will enable Chugach to forward those comments, and responses to them, to REA and thus expedite that agency's processing of Chugach's loan application. If you have any questions or need additional information, please contact me or Mr. Eric Haemer at 276-3500. Latvrence D. Markley Executive Assistant Environmental & Publ LDH:cls Affairs --_.------------------------------------------ '- . ...,. /) ELECTRIC ASSOCIATION. INC. P.O. BOX 351B • cAVlc~ohage. cAQas~a 99501 • PHONE: 907276·3500 August 28,.1981 Mr. Art LaPerriere U.S. Fish and Wildlife Service 1011 East Tudor Road Anchorage, Alaska 99507 Dear Mr. LaPerriere: TELEX: Chugach AHG (090) 25 265 Chugach Electric Association, Inc. (Chugach), is in the process of preparing a loan application to the Rural Electr cation Administration (REA) for generation facilities improvements at two ting power plants. The improvements are needed on a priority basis to ensure adequate generation capacity and reliability for the coming winter's peak electrical demand period. The projects are as follows: 1. Installation of a 26-megawatt combustion turbine gen~ration unit: to be fired by natural gas with 1 distillate oil as back-up fuel, at Bernice Lake PO"\ver Plant on the North Kenai Road approximately 10 miles northwest of the City of Kenai. 2. Installation of oil storage facilities, including two 54,800-barrel tanks, at BeluRa Station, located approximately 40 air miles west of and across Cook Inlet from Anchorage. The storage facilities will permit the stockpiling of light dist late for use as supplemental fuel in the event of a shortage or disruption of the primary natural generation fuel. Each of the above projects will be constructed on the existing respective plant site and there should be virtually no impact on wildlife. Neither project will require any new water source and neither project will discharge water or other substance into any stream or other water body . ._-------------~~-- Mr. Art LaPerriere -2-August 28, 1981 Under REA regulations, neither of the projects should require an environmental impact statement. A copy of the Borrmver' s Environ- mental Report, prepared for REA by Chugach, is enclosed. Chugach would appreciate your comments, if any, on the proposed projects at your earliest convenience, due to the projects' importance and the time frames involved. If Chugach has not heard from your agency within thirty days, it will be assumed you have no major objections to the projects. If you have any questions or need additional information, please contact me or Mr. Eric Haemer at 276-3500. Very truly yours, / ~ ,,--:--; d t-L:::e:;':';. ~;k:~~ <~~A-~) Executive Assistant Environmental & Public Affairs LDl"l:cls ..... _--------------_._--------------------- /") ELECTRIC ASSOCIATION. INC. P.O. BOX 3518 • cAttcltOltage. <...AQagka 99501 • PHONE: 907276-3500 August 28, 1981 U.S. Soil Conservation Service 2221 East Northern Lights Boulevard Suite 129 Anchorage, Alaska 99504 Dear Sir: TELEX: Chugach AHG (090) 25 265 Chugach Electric Association, Inc. (Chugach), is in the process of preparing a loan application to the Rural Electrification Administration (REA) for generation facilit s improvements at ti:,oJO existing power plants. The i.mprovements are needed on a priority basis to ensure adequate generation capacity and reliability ·for the coming winter's peak electrical demand period. The projects are as follows: 1. Installation of a 26-megawatt combustion turbine generation unit, to be fired by natural gas with light distillate oil as back-up fuel, at Bernice Lake Power Plant on the North Kenai Road approximately 10 miles·northwest of the City of Kenai. 2. Installation of oil storage facilities, including two 54,800-barrel tanks, at Beluga Station, located approximately 40 air miles west of and across Cook Inlet from Anchorage. The storage facilities will permit the stockpiling of light distillate for use as supplemental fuel in the event of a shortage or disruption of the primary natural gas generation fuel. Each of the above projects will be constructed on the existing respective plant site and there ~hould be virtually no impact on wildlife. Neither project will require any new water source and neither project will discharge water or other substance into any stream or other water body. U.S. Soil Conservation Service -2-August 28, 1981 Under REA regulations; neither of the projects should require an environmental impact statement. A copy of the Borrower's Environ- mental Report, prepared for REA by Chugach, is enclosed. Chugach would appreciate your comments, if any, on the proposed projects at your earliest. convenience, due to the projects' importance and the time frames involved. If Chugach has not heard from your agency within thirty days, it will be assumed you have no major objections to the projects. If you have any questions or need additional information, please contact me or Mr. Eric Haemer at 276-3500. Very truly yours, .-. /1 /) .;/: /. , ,/:>. ".//' f. ........ ~, ex-: t:;/;.V/?-A~~ . )/ Lawrence D. Markley Executive Assistant Environmental & Public Affairs LDM: cls /") ELECTRIC ASSOCIATION. INC. P.O.80X351e .. t.A."c~ohage. t.A.Qas~a 99501 • PHONE: 907276-3500 August 28, 1981 Hr. Tom Chapple Environmental Engineer Alaska Department of . Environmental Conservation Pouch 0 Juneau, Alaska 99881 Dear Hr. Chapple: TELEX: Chugach AHG (090) 25 265 Chugach Electric Assoc ion, Inc. (Chugach), is in the process of preparing a loan application to the Rural Electrification Administration (REA) for generation facilities improvements at two existing pmver plants. The improvements are needed on a priority bas to ensure adequate generation capacity and reliability for the coming winter's peak electr demand period. The projects are as follows: 1. Installation of a 26-megawatt combustion turbine generation unit, to be fired by natural with light distillate oil as back-up fuel, at Bernice Lake Power Plant on the North Kenai Road approximately 10 miles northwest of the City of Kenai. Uni t No. 4 1;vill be operated as a peaking unit only. 2. Installation of 0 storage facilities, includ two 54,800-barrel tanks, at Beluga station, located approximately 40 air miles west of and across Cook Inlet from Anchorage. The storage cilities will permit the stockpiling of light distillate for use as supple mental fuel in the event of a shortage or disruption of the pr ry natural gas generation fuel. Only Beluga units 1 and 2 -rated at 14 megawatts each - will be modified for such dual-firing capabili Mr. Tom Chapp -2-August 28, 1981 Enclosed are completed application forms and supplemental materials for your agency's review and as formal application .~ for air quality control permits to operate. Under REA regu- lations, neither of the projects should require an environmental impact statement. REA will review the Borrower's Environmental Report, prepared by Chugach, and then most likely prepare its own environmental analysis. Chugach has concurrently applied to the U.S. Environmental Protection Agency (EPA) to request the llowing for each project: 1. Exemption from review under Prevention Significant Deterioration regulations, and, 2. Waiver of New Source Performance Standards performance test requirements. A copy of the EPA f ing enclosed. It should be emuhas d, as it is in the' letter to EPA, that the primary generation fuel for both 'Bernice Lake Power Plant and Beluga Station is natural Distillate is used only as back-up fuel during extreme peak demand periods or in the event the natural suuplies are disrupted. This sue is addressed more ful in F s 1 18 of the BER. Part VI-Air of the BER contains a short-c~d long-term ground level concentrations analysis for Bernice Lake Power Plant including Unit 4. A similar analysis for Beluga Station with Units land 2 on distillate has not yet been complet by General Electric Company's Technical Resources Operation. That analysis will be forwarded to you as soon as it is received. Chugach would appreciate your comments on the proposed projects . at your earliest convenience, due to the projects' importance and the time frames involved. Even though the permits to operate will probably not be sued within 30 days, Chugach would appreciate your comments within that period, so they may be dealt with and forwarded to REA to expedite that agency's processing of Chugach's loan application. If you have any questions or need additional information, please contact me or Mr. c Haemer at 276-3500. Very truly yours, / .J/7 cx(.fv-r?''''-( -:f} _ -)r:'c;-/!'t:~) Lm,.;rrence D. Markley p Executive Assistant Environmental & Public Affairs LD~'l:cls lV'~~:~~&Af'# ELECTRIC ASSOCIATION. INC. P.o. BOX3518 • ~.,cttohage, G4~ag~a 99501 • PHONE: 007 276·3500 August 28, 1981 Mr. Torn Arminski Habitat Division Alaska Department of Fish and Game 333 Raspberry Road Anchorage, Alaska 99502 Dear Hr. Arminski: TELEX: Chugach AHG (OSQ) 25 265 Chugach Electric Association, Inc. (Chugach), is the process of preparing a loan application to the Rural Electri cation Administration (REA) for generation facilities improvements at two existing power plants. The improvements are needed on a priority basis to ensure adequate generation capacity and reliability for the coming winter's peak electrical demand period. The projects are as follows: 1. lnstallation of a 26-megawatt combustion turbine generation unit, to be fired by na tur al gas vJi th 1 igh t dis tilla te oil as back-up fuel, at Bernice Lake Power Plant on the North Kenai Road approximately 10 miles northwest of the Ci of Kenai. 2. Installation of oil storage facilities, including two 54,800-barrel tanks, at Beluga Station, located approximately 40 air miles west of and across Cook Inlet from Anchorage. The storage facilit s will permit the stockpiling of light distillate for use as supplemental fuel in the event of a shortage or disruption of the primary natural gas generation fuel. Each of the above projects will be constructed on the existing respective plant site and there should be virtually no irr:pact on wildlife. Neither project will require any new water source and neither project will discharge water or other substance into any stream or other water body. Mr. Tom Arminski -2-August 28, 1981 Under REA regulations, neither of the projects should require an environmental impact statement. A copy of the Borrower's Environ- mental Report, prepared for REA by Chugach, is enclosed. Chugach would appreciate your comments, if any, on the proposed projects at your earliest convenience, due to the projects' importance and the time frames involved. If Chugach has not heard from your agency within thirty days, it will be assumed you have no major objections to the projects. If you have any questions or need additional information, please contact me or Mr. Eric Haemer at 276-3500. Very truly yours, ch ?") /r 7 , I} ~ I .., . /,~..-,~ ,c>' <! I·' '/ Lawrence D. Markley Executive Assistant Environmental & Public Affairs LDM:cls '- /") ELECTRIC ASSOCIATION. INC. P.O. BOX 3518 • ~~ct'OltOge. ~Qas~a 99501 • PHONE: 907276-3500 Augus t 28, 1981 Mr. Douglas R. Alaska State Office of History Alaska Department 619 \.Jarehous e Suite 210 Anchorage, Dear Mr. logist and Archeology of Natural Resources 99510 TELEX: Chugach AHG (090) 25 265 Chugach Elec c sociation, Inc. (Chugach), is in process of prepar a loan application to the Rural Electri ca on Administrat on (REA) for generation facilities improvements at two existing power plants. The improvements are needed on a priority basis to ensure adequate generation cap reliability coming winter's peak electriczl period. The projects are as follows: 1. Installation of a 26-megmmtt combustion ion unit, to be fired by s with light distillate oil as , at Bernice Lake Pm,ver Plant Peninsula. The plant is the North Kenai Road approxi les northwest of the City of 2. Instal ion of oil storage facilities, including two 54,800-barrel tanks, at Be Sta on, located approximately 40 les west of and across Cook In t Anchorap;e. The storage tanks will p t stockpiling of li8ht dis llate use '~s supplemental fuel in the event .of a shortage or disruption of the pr natural gas generation fuel. '- Mr. Douglas Reger -2-August 28, 1981 Each project will be constructed on the existing respective plant site, where clearances were given by your office in a letter dated May 18, 1977, for previous generation projects. A copy of that letter enclosed, as are maps showing the general and speci c location of the two new projects. In accordance with current REA procedures, Chugach has examined the National Register of Historic Places, including monthly supplements, and has determined that there are no proper es listed therein which are located in or close nearby the Bernice Lake and Beluga plants. As with previous improvements at these two plants, Chugach believes the proposed projects will have no impact on any properties currently listed in the National Reg ter. Please advise Chugach if there are other proper es eligible or proposed for inclusion in the National Register. Chugach would apprec te your coroments on the proposed projects at your earl st convenience, due to the projects' importance and to the time frames involved. If Chugach has not heard from your office within thirty days, it will be assumed that you have no major objections to the projects. Feel free to contact me or Mr. Eric Haemer at 276-3500, if you have questions or need additional information. Lmvrence D. Harkley Executive Assistant Environmental & Public Affairs enclosures LDl-'l: cls 'f' II" . ~ELECTRIC ASSOCIATION. INC. ~MBELLATEIGHTH • '.080'"'' • Jhchowge. LfHas~a 99501 • PHON E: 907 276·3500 Au?;ust 28, 1981 Mrs. Margaret Sagerser Vice President of Lan Cook Inlet Region, Inc. 2525 C Street Anchorage, Alaska 99509 Dear Mrs. Sagerser: TELEX: Chugach AHG (090) 25265 Chugach Electric Assoc tion, Inc. (Chugach), is in the process of preparing a loan appl ation to Rural Electrification Administration (REA) for generation ilities improvements at several existing power plants, including Beluga Station. The Beluga Station site is located on lands leased by Chugach from Cook Inlet Region, (CIRI), and formerly identified by the Alaska Division of t, Land and Water Management as lease No. ADL 32036. The Beluga project will consist of the tallation of oil sto e facilities, including t'i:vo 54-800 1 tanks, to permit stockpil of light stillate oil for use as supplemental fuel in event of a shortage or disruption of the primary natural generat fuel. ilities are needed on a priority basis to ensure adequate generation capacity and reliability for Chugach's retail and wholesale consumers in the Anchorage-Hatanuska Valley-Kenai Peninsula area. tanks 11 be located at the sting power plant site approximately 600 feet north of the powerhouse building. (A site plan, dep ting the proposed storage facilities, is enclosed). An earthern dike will surround the tanks as part of an oil spill prevention plan which is currently be developed. Oil will be transported by barge to an existing beach road approximately six miles south of plant, tanker trucks will transport it over an existing gravel road to tank site. Chugach would appreciate your comments, if any, on the proposed project at your earl st convenience, due to the project's - Mrs. Margaret Sagerser -2-August 28, 1981 importance and the time frames involved. If Chugach has not heard from CIRI within thirty days, it will be assumed CIRI has no major objections to the project. If you have any questions or need additional information, please contact me or ic Haemer at 276-3500. Very truly yours, / () 'l/} '" /ft-: 0{ 4t<.l"l'c~<:.t? -C::;v' / r , LaHrence D. Markely / Executive Assistant Environmental & Public Affairs LDM:cls '- .. /"') ELECTRIC ASSOCIATION. INC. PO BOX 3518 • ~t1ChO;i(1ge. ~Q(1S~(1 99501 • PHONE 90,7276-3500 August 28, 1981 The Anchorage T s Display and Classi ed Advertising Departments Box 40 Ancho , Ala 99510 Dear Sirs: TELEX: ChlJg.:.cn AHG lO~m 25 265 enclosed notice in your next edition bo as a one-co display to my a tten t imperat affidavit si ed legal notice and as a two co a full box. Forward your billing statement at Chugach Electric Association, Inc. It is I also receive your proof-of-publ ads as soon as possible. You may contact me or Mr. Eric Haemer at 276-3~00, if e are any st s. Two copies of the notice are enclosed. Very truly yours, ~' 'J ?h'" /);;? " 4 >-v.,l/, //, ",.-r~;. -\b:"vr~", ......,. , / t. La".,rence D. ey Execut sistant Environmental & Public Affairs LDN:cls P.O. BOX3518 • ~},cl'oltage. ~Qa8~o. 9!!501' PHONE: 907276-3500 August 28, 1981 Kenai Peninsula Cheechako News Advertising Department Drawer 0 Kenai, Alaska 99611 Dear Sirs: TELEX: Chugach AHG (090) 25 265 Please run the enclosed notice in your next edition both as a one-column classified legal notice and as a two-column display ad with a full box~ Forward your billing statement to my attention at Chugach Electric Association, Inc. It is imperative that I also receive your proof-of-publication affidavit for both ads as soon as EQssible. You may contact me or Mr. Eric Haemer at 276-3500, if there are any questions. Two copies of the notice are enclosed. Very truly yours, Lav7rence D. Harkely Executive Assistant Environmental & Public Affairs LD:tvI:cls CHUGACH ELECTRIC ASSOCIATION, INC. Notice of Loan Application Chugach Electric Association, Inc., Box 3518 (Gambell at Eighth Avenue), Anchorage, Alaska, 99501, announces that it is making an application for a loan guarantee of approximately $9.l t million from the Rural Electrification Administration, to provide for generation facilities improvements at two existing power plants. The projects are: 1. tallation of a 26-megawatt combustion turbine generation unit, to be fired by natural gas with light distillate oil as back-up fuel, at Bernice Lake Power Plant on the North Kenai Road approximately 10 miles northwest of the City of Kenai. 2. Installation of oil storage facilities, including two 54,BOO-barrel tanks, at Beluga Station, located apprcximately 40 air miles west of and across Cook Inlet from Anchorage. The storage facilities will permit the stockpiling of light distillate for use as supple- mental fuel in the event of a shor or disruption of the primary natural gas generation fuel. A Borrower's Environmental Report, which indicates antici- pated environmental effects (which will be minimal) has been prepared for the proposed projects. A copy of this report can be revie,,]ed at Chugach's principal office -Gambell at Eighth Avenue in Anchorage --or at the Western Area Office of the Rural Electrification Administration, 14th and Independence Avenue, S. \,,]., \vashington, D. C., 20250. Comments on the enviromr.ental effects of the projects must be submitted to Chugach or to REA's Western Area Office within 30 days of the publication date of this notice. Additional information may be obtained by contacting Larry Markley or Eric Haemer at Chugach. The telephone number is (907) 276-3500. Chugach does not believe the proposed projects will have a significant effect on the quality of the human environment. The Rural Electrification Administration will make its independent environmental assessment prior to granting financing financial assistance. ARLlS Alaska Resources Liorat}' & Information Servlce~ Anchorage Ala~kll ,-WELLHOUSE #3 1 o . "' ro OJ 1 f i i , . ' , , , , I, i , <::~-----------.---.~---------_. -~- ) rFIRE HYDRANT (J , L. WELL HOUSE #1 ___ -l-_ 1F=="'*"'=="'--'-;===7<F--,--~ =--::;;-:=-,;:-. -"._. '.C:: .• :::-,. =.. .=-. C:;-.~ = .. = .. =,= ... C=:.~~C '. J 'NLET 1I ~" ... --~-." UNIT #2 'I , i f-- . . FIRE HYDRANT ,. --, --,,--" ,--,--.. ~. -' ···~"----F(~::t=t~=Q=· =~ -='. '~K~=_ -~-1. , I . ____ .' ---.....-----I ~-,,+---'~--.,-:. J , I I 69 K'/ " 249 KV UNDERBUILT , . . . ---.-.-"_- NORTH KENAI ROAD • • • CONTROL HOUSE HEA 2 3 T '" i , 'I , \ \ ',?·?ncrq ADDED BLDG ADDITION, DRAIN 6 WATER LINES, 'RHS I ,7·23-81 PROPOSED UNITS B SKIDS !l5 KV ------, R H SARASIN ,'~,'.J', " -----.---S,)"f"',"<;r,R LOCATION VICINITY ATTACHMENT #1 ENGINEERING BERNICE LAKE POWER PLANT 4/11/79 ...... ...,,~~'"' C; ~ EC" R ,CI\SSOCIATION, :INC A nch0 l og8, Ii QSKO --,-;-= SITE PLAN 11.", 'Jf.: ~