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Kake Community Biomass Energy Final Design Package - Jun 2020 - REF Grant 7071087
MEMORANDUM TO: Gary Williams (Organized Village of Kake) FROM: Meagan Hartman (Wisewood Energy) CC: Taylor Asher (Alaska Energy Authority), Robert Venables (Southeast Conference), Karen Petersen (Southeast Conference), Clay Good (Sustainable Southeast Partnership), Andrew Haden (Wisewood Energy), David Featherman (Wildephor Consulting Services) DATE: 6/19/2020 RE: Biomass district energy system final design package Wisewood Energy was retained by the Organized Village of Kake (OVK) to develop the detailed design and engineering of a biomass district energy (DE) system that can utilize locally available woody biomass fuel from the surrounding forested area. The biomass system is designed to provide heating to the Public Safety Building, Boys & Girls Club, Health Clinic, Senior Center, Kake School, a future greenhouse, a future building at the Bingo Hall location, and the Community Center/Gym (included as the Add Alternate 1 option). The biomass system is designed to directly support OVK's goals of reducing operating costs, strengthening energy independence by reducing reliance on fossil fuels, leveraging a local resource that is currently underutilized, and contributing to the local economy. This summary memo and supporting documentation listed below constitute the final design package: 1. Final energy model, capital cost opinion, operating cost opinion, and pro forma for the Base biomass district energy system and Add Alternate 1, in addition to sample biomass energy price calculations to be used with the Thermal Energy Services Agreement (TESA) template, included as Attachments to this memo; 2. Template contracts for use during final development and implementation of the facility, including Memorandum of Understanding, Wood Chip Fuel Supply Request for Proposals (RFP), and TESA, included as separate editable files; 3. Stamped engineering drawings for the biomass district energy system, including mechanical (sheets M0.0 — M8.0) , electrical (sheets E0.1 — E4.0), and structural (sheets S1.1 — S3.4) designs, provided together as a single separate file; 4. Mechanical specifications, provided as a separate file; and 5. Electrical and structural specifications, provided on their respective drawing sheets. WISEWOOD ENERGY • Technology in Service of Community and Environment www.wisewoodenergy.com 0 info@wisewoodenergy.com 1 Biomass System Design & Operations The proposed biomass district energy system will utilize a central boiler plant to provide heat for the identified community buildings in Kake. The system was designed to be extremely robust in order to accommodate a wide range of potential wood fuel sources. Core to this design is a 2,060 MBH Kohlbach biomass boiler, which is capable of cleanly and efficiently utilizing chipped woody biomass fuel having a moisture content of up to 55% and particle sizes up to 4" minus, with occasional particles up to 12" in length. The biomass boiler will provide approximately 96% of the identified buildings' heating needs, with a 4,000 MBH propane boiler included to cover trim heating and to serve as a fully redundant system backup. Wisewood Energy has identified five scenarios for sourcing woody biomass to fuel the proposed district energy system: 1) slab wood residuals from local wood processors; 2) existing cull wood from previous harvests; 3) alderfrom clearing overgrown road systems; 4) residuals from commercial sawlog harvests, and; 5) residuals from pre -commercial thinning operations. A mobile chipper will be required for all scenarios. Each supply scenario differs in total available volume and frequency, and most scenarios will require forethought in terms of establishing relationships with local suppliers to make efficient use of resources. Proactively seeking sources when they are available and stockpiling sufficient supply at a secondary storage site will be essential, due to the sporadic nature of timber harvesting and associated milling activities in the local area (see the Wood Supply and Processing Plan previously completed by Wisewood Energy for more detail). The biomass boiler plant is designed with a primary fuel storage capacity of approximately 70 green tons (sufficient for over two weeks of storage during the coldest weather), with a 12,000 square foot secondary storage and wood processing facility also proposed (see drawing sheets M1.2 and M2.0). The provided operating cost opinion assumes that fuel is transported from secondary storage to primary storage using a small (e.g., 20 cubic yard) truck, including loading and unloading; larger walking floor semi -trailers can also be accommodated, which would reduce fuel handling costs. Fuel can be delivered directly onto the walking floor within the fuel bay in the biomass boiler plant, or dumped onto the concrete apron in front of the fuel bay and pushed in with a small front-end loader (see drawing sheets M2.0 and M2.2). Ash produced by the system is benign, and can be incorporated into soil fertilizer; alternatively it can be landfilled by using an included hoist system and pickup truck for transportation (see drawing sheets M2.0 and M2.2). It is assumed that OVK staff will perform these tasks, as well as regular maintenance such as daily visual checks of system sensors; however, OVK may choose to contract out various elements of this work. WISEWOOD ENERGY • Technology in Service of Community and Environment www.wisewoodenergy.com 0 info@wisewoodenergy.com 2 Financial Analysis Key cost estimates and findings are described below and summarized in Table 1, with further detail provided in Attachments to this memo. OPERATING COSTS An average price of $95 per green ton is assumed for wood fuel delivered to secondary storage, based on the previously completed wood supply and processing report. Depending on the fuel source, this price may be higher or lower. In addition to wood fuel costs, the operating cost opinion includes system de-ashing, ancillary electricity, trim fuel, regular maintenance, remote monitoring, and administration. Insurance is included as part of administrative costs, although premiums can vary widely and OVK should consult with an insurer for more precise rates. The City of Kake has also indicated that it may require franchise and site lease fees; those line items are included in the operating cost opinion but no dollar amounts are given, and Wisewood Energy recommends that OVK negotiate those costs directly with the City. Operating costs for the proposed biomass district energy system Base option are estimated to be approximately $133,000 per year compared to the business -as -usual costs of about $200,000 per year (based on 2014 — 2016 data), generating annual savings of nearly $68,000. If the Add Alternate 1 system design is implemented, biomass operating costs are estimated to be approximately $157,000 compared to a business -as - usual of over $252,000 per year, generating annual savings of over $95,000 per year (see Attachments 3 and 4 for additional details). Approximately 65% of these operating costs are expected to be retained in the local community, or around $88,000 per year in the Base option and $102,000 in Add Alternate 1, including wood fuel procurement, fuel handling and delivery, de-ashing, and scheduled maintenance. Any additional fees to the City of Kake would add to overall operating costs as well as value retained in the local community. CAPITAL COSTS AND PAYBACK Wisewood Energy estimates capital costs at the line item level and uses a standard method of assigning risk factors based on the source of the estimate. Using this estimating method, the capital cost opinion for the biomass heating system Base option is approximately $4.4 million, or up to $5.2 million including potential cost risk. The capital cost opinion for Add Alternate 1 (including the Community Center) is approximately $4.8 million, or up to $5.7 million including potential cost risk (see Attachments 5 and 6 for additional details). Of note, the capital cost opinions assume a rate of $162/hour for all labor costs, based on available regional information, which may be conservative for some line items. Additionally, a higher potential cost risk is included for the Add Alternate 1 option, due to uncertainty regarding the full engineering requirements to secure the hot water pipeline down the cliff between the Health Clinic and Community Center. WISEWOOD ENERGY • Technology in Service of Community and Environment www.wisewoodenergy.com 0 info@wisewoodenergy.com 3 Simple payback for the two options range from 50 to 65 years, or 25 to 28 years including a 4% price escalator on fossil fuels and 2% on all other costs. Wisewood Energy modeled an incentive of $1.5 million, which brings simple payback down to approximately 34 to 43 years, or 20 to 22 years escalated payback. In all cases, the Add Alternate 1 design option performs better. See Attachments 7 and 8 for more detail. TABLE 1: Estimated displaced fossil fuel, annual savings and value retained locally, capital costs, and payback for each development option. The capital cost opinion range reflects a baseline and a risk - adjusted total project cost. Displaced Fossil Fuel (MMBtu/yr) 4,991 6,013 Annual Savings $68,000 $95,000 Annual Value Retained Locally $88,000 $102,000 Capital Cost Opinion $4.4 — 5.2 M $4.8 — 5.7 M Simple Payback* (yrs) 43 34 Accelerated Payback** (yrs) 22 20 Notes: Estimated fossil fuel displacement, savings, and local value include the future Bingo Hall and greenhouse; however, capital costs for connecting these facilities are not included in the capital cost opinion. Simple and accelerated paybacks assume $1.5 million in grant funding is used for construction. Given the relative uncertainty in wood fuel prices, sensitivity analyses were conducted for both the Base and Add Alternate 1 options to determine the impact of potential price changes on annual operating costs and simple payback (including incentives). The analyses used the estimated non -wood fuel values from the respective operating cost models, along with a $50 to $125 per ton delivered wood fuel cost based on average data compiled in the Wood Supply and Processing Plan. The outcome of the sensitivity analyses shown in Figure 1 below provides a range for the total annual operating cost savings from $46,000 to $133,00 per year, and simple payback 24 to 61 years. WISEWOOD ENERGY • Technology in Service of Community and Environment www.wisewoodenergy.com • info@wisewoodenergy.com 4 $160,000 $140,000 $120,000 a $100,000 i» $80,0o0 $60,000 Q $40,000 $20,000 $0 —Annual Savings - Base Option - - - Annual Savings -Add Altemate 1 —Simple Payback ($1.SM incentive) - Base Option - - - Simple Payback ($1.5M incentive)- Add Alternate 1 -, $50 $65 $80 $95 $110 $125 Delivered Wood Fuel Price ($/ton) FIGURE 1: Wood fuel price sensitivity analysis results. Project Implementation 80 70 60 50 a 0 40 30 20 E 10 0 With the completion of this design package, next steps to implement the Kake biomass community energy project include gaining community support and commitment to connect to the planned system, identifying likely first sources of fuel, securing project funding, executing Thermal Energy Services Agreements (TESAs) with identified district energy connections, and initiating final engineering and construction (see Figure 2 below). Three template contracts have been provided to support this process: an MOU, wood fuel supply RFP, and TESA. The MOU is intended to be executed with entities that operate facilities identified as potential heat customers of the system, and states their commitment to connect to the system if a price for heat can be mutually agreed upon with the owner of the system (presumably OVK or its subsidiary). This document is important to demonstrate to funders that the project has community support, and will generate revenue if constructed. End of Wisewood Energy's Finalize remaining engineering items current scope of work. Finalize cost of energy for heat based on selected building manufacturer customers based on likely fuel and pipeline connection to Community supply and financing. Center (if applicable) Execute MOU with identified heat I Execute Thermal Energy Services customers, committing to connect to Agreement with identified heat customers. the system if parties can agree on the final cost of energy. FIGURE 2: Implementation steps for the Kake biomass community energy project. WISEWOOD ENERGY • Technology in Service of Community and Environment www.wisewoodenergy.com 0 info@wisewoodenergy.com 5 Next, OVK will need to identify potential sources of funding while also confirming likely first sources of biomass fuel. This will inform the development of a final viable price for energy produced by the system and sold to customers. The template fuel supply RFP can be used to engage wood fuel providers and document agreed upon prices for delivered wood chips. Once a final price and financing is confirmed, and prior to the final design - build stage, TESAs should be executed with all customers that will connect to the system. Exhibit C of the provided template TESA includes a suggested methodology for determining the price of energy for customers, using a variable and fixed rate, and a sample calculation of these rates is included as Attachment 9 to this summary for illustrative purposes. Lastly, the project will enter into a final engineering and construction phase. Prior to initiating construction, further civil and structural engineering evaluations will be needed to confirm the assumptions made in this design package with respect to final dimensions and other details of the prefabricated metal building and its foundation. Those evaluations will require final mechanical system design documents from the biomass boiler manufacturer, Kohlbach, as well as input from a regional metal building fabricator. Conclusions Wisewood Energy is excited to offer this completed design package to OVK in support of the community's innovative efforts toward energy resilience and independence. It is not surprising that capital costs for this project are high and the payback period is long, which is aggravated in an environment of very low conventional fossil fuel prices. However, we believe the underlying goals of the community will be met with the project as designed, which will have additional benefits beyond what is captured in operating costs and payback. The system is designed to be robust enough to utilize most wood chip fuels available in the area surrounding Kake, even with high moisture content and larger particle sizes. The use of this material, in addition to regular operations such as de- ashing and maintenance, will provide significant value that is retained in the local community, while also providing a new outlet for biomass material that can support forest thinning efforts in the region. Finally, making use of an abundant and locally available material will shift the community away from a reliance on imported fossil fuels, which have had unpredictable price fluctuations in the past. Cost modeling suggests that the system is most economic with the Community Center/Gym Add Alternate 1 included, which also aligns with the goals of the project to be a true community system. We have scheduled a conference call for Friday, June 26, 2020 to review the final design, respond to any questions OVK and stakeholders might have, and discuss potential next steps for project implementation. In the meantime, Wisewood Energy is available for questions or feedback on what has been submitted here. WISEWOOD ENERGY • Technology in Service of Community and Environment www.wisewoodenergy.com 0 info@wisewoodenergy.com 6 Attachment 1 Final Energy Model Base Option O 0O C N W �p w m N 3 >. E a U E m � Vl fn EU) 0 'a m N 0 Y C' R O Y a` s E R Q O sT m U N 3 V N tM0 O M O N N M n p O M c V M n o N W M 7 N N N O N o N O C n M M 7 � M r (D T n MO) 'Cl N N 3 .. ua) QM 7M 0Q]1 MM Q(D Vn QLLJ VV QN N NNNM M w u C a w O a Q E 3 R N N � R O a a �. �. y �. a `. Z. Z. Z. Z. Z. C 3 O t0 F _A T O E E N w w o w o 'Y-' o" o Q C O o rL o OI 6l E 5, Vl 3 U 3 U ww U U �2 w y N y 2 c u C ^L U = L L W r _ = « 7 N O OI C R «_ U N Q w O' o = R o' Q W O O U ot0.f R Q. c =_ o' o w u w Q c O a Q w m o m c m E m rn 3- o Q w Q > is u o m= o R E o' m E m w U w Q w 'o o E' w 2 O w o L' W = h= w w In O 'C 'O r w m N tD M n M 01 tD N Ol 2 w L « w 'o o U ; i0 N N N N M cD n rn C •i0 O O L U w U d w « QQ H N � w N 'C •� u 10 2 O m 2w ~ E o w o v w E 00 o F m o y O ~ U f w O Q` N O y� O O p o O O N o O M w R O O N O o N W O M o C a E 3 N V�I m M n M �fl cD N Q1 Q1 Q1 7 N M O V O O O O) N N N O- O O M N M O M O` O V O O N N R C E o N N O O M N (D n M 7 (D 1� M M M 7 M N p M M V N °' co = 4 a N ER 6? o IN n O R a a a • R C N w O u u c a� w o w E o LL rn C Q C O O w>>" > U >> E N O m m m m m H d LL i C C 'w m Dl Dl C O T UC o E C O U L N R R O E1 Q �+ m o N o L >i W W w s o w o U U E w R m a v o o L o` m c w? E' R a o w Q 2 Q ' Q y u°1i O C E R E L m M n In M In Q) N O M n M L w >, G >. D1 = 3 `o Q u u o w w Q Oo o = w w W O 'C 'O U r2 M n a M M v n n M M a In N M In (D In 7 7 M N a of w o U o w w y Q w u i w R i r c w L R s = w y m .o ai w c L w 'c N c W in o. o. o m y E y w .o g g > Q w w w w w w Q w 3 U c N w O N (O 7 7 o N O y w S N M cw o N O M n O ID p IrMj In O y 3 o N m M O M 7 n lU N D) n 7 M 7 M M N lU 7 N N M M M to to N C i N V M M a O M C O) OrL M 7 M n M In to 7 M N N O N C R 6? M ElT w C> u w F y LL o o _ w a _ U w w Q E w L U T � O A >` A A w y Ol Ol Y m m m a V L o U N w r r LL R R N o o w U ULm w m a W W M T W M T N 7 3 LL C C U w o Q Q �? U ;F N E O m C C G 7 7 p1 a Q •o w a E L d rn c 'o 'o a a o -o a a o o o. o. a •o m rn Q R C °� L u u E E E o 'R oo 2 5 0 E o a R Q 'O U O R o �' a o U U o o m C U w o xw > w o E Ei O o 0 w w O O w w o o •o U U A m O Q m w w W i w o o m m w c Q a o u w E o E E>> a@ 3 H W Q O w W w O d U > U C L R Q = 7 3 m O o w Li z ❑ u7 } rn 7 T m m m m x @ U � ;O N_ CD 5 a1 T Cc O E O a) Zo O 00 p m N LL m N m T d a LL ' aE 0 a` m cn a a En N -O O [L N � Qa 0 a` c 0 >. Q d .O Y d <O C m Y W m �~ r m Y E v m 7 % m — d ¢?:o 1 m L. 5 y m 7 0 20. E > g V y 0 c m is V) y A c N E (n JU m CD m Ch m 0 0 Y m ¢ -O N �O 8 L c co W x � L � T � � LL O O V W Z : co 0 L O] co T L :n T O o m - U 8 m a LL 1 � O U J �� ++ iz m C L ^' W 2 co co N = _0 s 1 iz 2 E o o � w 1 a � � c z° U 0 c a> a 1 O D 8 U 1 E w 0 0 O O 0 o aai O fn O o 0 co N (HBW) PUBWO MOH 06BJOAV IT c 0 �0 Y � Y w , 00 O a .� m Ema21 �p IG E C: Y � O Q Y (D V E () Y o R R N £ -0 -1 U m cn W m oY 0 2a d p o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o e o 0 o e e e e e e O M O � � N 1� O M B LL Oq N ID O V W N N f0 O V N N O t0 V N N (O O V aD N 0 O V ap N (O D N N N M M V V V 10 l0 cp c0 t0 I� n W of a0 a7 0 112 0 0 O m N O O O > p O O a w t� M J � c � .O m O o I N Z e d o ` L W n = W U N c O LD �] L Q O N o U O N cu m° oo J N a a 3 E y W U M U a N �p Ul O v N N E c W N N N In O a rn a I I o u2 o in o u� (HBW) pueuaa4;eaH pad w4S3 Attachment 2 Final Energy Model Add Alternate 1 - Including Community Center m E U 7 E E O U c U N 7 O W W cOD O M O o N N M N N 7 w p N M O O W O) p 0 N O O N (O N O C N of O M m M 4i 1� pj M C � V3 � FA V3 to EA •p �• u N O •o• E m ' O a` � w 0 U i Z, Z i i 5 5 R i0 L w 3 E N o m m O T N o r 5 i 5 7 0 E m m 0�- 0. °u °u 00 a o m c u m rn E u°'i c°r w m w wN u •a m _ m �• u c L L c w c — p N c 3 o . A N W O. w O. O N L O. O. N G U V G w �• q C U C ."T' S a o 0 c m: a` au c. o> o LL u c o a m E R E o m A E m S t> m °' o. °' m E1 0 r c u c CO >>o = W S Oo > C m N O U U jp N r2 N N [�') N N N N �� op O N c •ia 3 v o p u° 'C y Y r w ` N •p �. o m � r m o c r m r u m .o o` N O � c y O 00 0 O O p a7 O_ O O N M O O O Q. a E @ C m M fOD N 0 7 0 W m O a M N C> N 7 N O °J O W U �p t0 HT ER N V3 E 02 0 O n c O d 'o m O T y a � a w w u r o m 0 T E N o a` LL 0 rn 3 Y 3 « m m t 0- O m m m m m r IL = C m c p V 'o c L .a w 0 w w E E m E o E L L R 3 w 0 R o. m c Y w o i 0 0 N o -o o F Q C O O U R 0 a c 0 ` E 2CL ac a G O = ` m L 0 mO O. c a EmO NO O E c 7c O pC sR roj d' vIn n oO vM 1M� Inp rnM wN 1M� o O M O al O O O. 'U N G R r2 pTj N C E a N W W O O N N X N O R R N U 0. L W N �. N 0 m p u N w o rn rn m a` 0 w c v 0 c C a -w W W � U c Ja � N « C 'O 0 N o O N N� 7 VR T N m M Ou NNM En G c% EMs 2m y v LL O a 0 c C.)0 m a E O"`yJ RL U C y T T W. m 3 mo 0 m O p y O C U F LL 'r R R O m c U C p q G a W a W M M a W M M N 7 d' In w m of cD 1� N O N N N� p� LL O O. a s O. E G L� 0 0 N 0 'o - 0 G N o �` L 6 C 0 2 0 u L ua o3 30 = m f .`o 'a y 0 o u o m w c m 03O 0 . m O .a 02 uE o •c�0 X0 0)c w dm `LL W00 o 0o LL vE O N Lc O EE 'W 3 3 W W UNNa2 O ' LL Q ZO T E 0 o U m N C C (6 N E o O w m3 x m m - 0 � o g c w E =° E 0w U 0 0 w CA m �N U � ;O N CD x N T O O NN 00 p m N LL d (D m T a2�- d O. LL "� E a0 a` m cn (n N -O O O T � a U' as T Q .E a 0 E E 0 U rn =o U C N (6 E <0 C Q Y W o `~ +' Q Y E O ..m 4) m T ¢ o <3 c °'� _ y A 7 0 Q Y o . > UE toc R R V) y A c C N E U) J U m u0i (D m 0 0 Y rn N ro � Cl) U d ' L N c P5 O O U Q L J LL b ° -C O Q co co U O J co O C) ' m LL _0 U- 0 O cz (p <. C E C�7 cz o E _,_ o axi U o U W u a E Z Q 7 C5 N CO z O �0 8 U) Un m E 1 1 O O O O N C 0 0 0 o 0 (n co N (HOW) PUBWOO IUaH a6Uaany E O f U V T m N C C 6 N O W m3 x m m � o g c W E =°• E oW U 0 0 w W m �N _co U � N_ yj 5 N T O O N E O N O O p m N LL d N m T a C L O O_ LL � E a0 a` m cn w 'O (n N -O 0 O � N � U' as .E a m E E 0 U 'O U C N f6 C <0 C Q Y w o �~ r Q Y E OFn m ai 7 1 Q o O E _ y A 0 Q Yi�L7 > UE y 0 c R A V) N A C C N E (n JU 0-0 m CD N N m 0 Y O Y 2 t0 O_ y a a o 0 0 o a o 0 0 0 o a o 0 0 0 o a a o 0 0 o a o 0 o e e e e .N o x m o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... coo d 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 V W N "0 O V W N N (O O V aD N O (O 'It W N (O O V W N (0 O V N N (O _ _ _ Q p O-- N N N M M V V V N N (O (O o I n m N m. m 0 0 0;: ;:'�! �! �2 N O m 0 OD > L M 9_ U M ) O /0 <0 O 2 m O N 0 T o 0 N Z N oi N (y J ai uMi 2 � 01 N � L � > ° O N O L U � c �y \V rn o m U 8 vj U C7 O a�i `� 49 w E 15l Ifa N ci = o Q N N W 41 ca C_ N:E U 0 41 (n W w o U z, c E :E N � I = I 0 0 0 o 0 0 M (V 0 0 0 0 0 00 0 00 0 N (HOW) puewad WaH palew!IS3 Attachment 3 Operating Cost Opinion Base Option Organized Village Kake W I S E W O O D ENERGY Kake Biomass Community Energy Operating Cost Opinion Base Option Location Kake, Alaska Proposed System Biomass District Heating Project Manager Meagan Hartman Client Contact Gary Williams Proposed System Output (MBH) 2,060 Email info@wisewoodenergy.com Date Last Modified 6/16/20 Proposed System Fuel Type Forestry Residuals Delivered Wood Fuel' Wood use (@ % MC) 50 % 696 tons per year Estimated wood fuel price $ 95 per ton (average) Wooiiiiiiiiiiiiiiiiiiiiiiandling & Delivery to Boiler from Secondary Storage Handling and transportation 696 tons per year Tons per delivery 5 tons per load Fuel deliveries needed 139 loads per year Loading/unloading time 1 hour per bad Delivery time (round trip) 0.5 hour per bad Fuel handling & delivery labor rate $ 32 per hour Ash container capacity Ash container removal Ash removal labor rate Labor for ash container removal Ash disposal fee Total electrical consumption Total electrical use charge Total electrical demand charge 1 yards 36 intervals $ 32 per hour 1.25 hour per interval $ 50 per interval 32,514 kWh $ 15,932 per year $ 3,249 per year Subtotal: $ 66,072 1 Subtotal: $ 6,762 Subtotal: $ 3,295 Subtotal: $ 19,181 All materials contained in this document are the intellectual property of Wisewood Energy and are provided exclusively to Client. Copyright ©Wisewood Energy. All rights reserved. Remaining Propane Propane use (peak and low load) 2,088 gallons Propane cost $ 2.49 per gallon Subtotal: $ 5,191 New Biomass System Operating Cost Total $ 100,501 Scheduled Maintenance ' Weekly and monthly boiler checklist 9 months Maintenance labor rate $ 32 per hour Monthly labor hours 31 per month Boiler water treatment $ 50 per month Annual boiler cleaning $ 2,000 per year Subtotal: $ 11,490 Remote monitoring period 9 months per year Static IP and internet connection $ 150 per month (year round) Third party remote monitoring services $ 5,625 per year Subtotal: $ 7,425 Administration' Insurance 0.3% of Project Cost Site lease TBD Franchise fee TBD Subtotal: $ 13,192 New Biomass S stem Maintenance Costs Total $ 32107 N ew Biomass System Cost, Total .I: Estimated Year One Savings (Cost) Compared to Business As Usq�a��� $ 67,739 Notes 1. See 2018 Wood Supply and Processing Plan by Wisewood Energy for greater wood fuel supply detail. Does not include potential personnel costs to manage fuel procurement. 2. Admininstration fees are provided as an estimate only, and vary by location. Client is responsible for confirming pricing with insurer and relevant local entities. 3. Includes delivered wood fuel, fuel handling & delivery, ash disposal, and scheduled maintenance. All materials contained in this document are the intellectual property of Wisewood Energy and are provided exclusively to Client. Copyright ©Wisewood Energy. All rights reserved. Attachment 4 Operating Cost Opinion Add Alternate 1 -Including Community Center Organized Village Kake W I S E W O O D ENERGY Kake Biomass Communitit y Energy Operating Cost Opinion Add Alternate 1 - Including Community Gym Location Kake, Alaska Proposed System Biomass District Heating Project Manager Meagan Hartman Client Contact Gary Williams Proposed System Output (MBH) 2,060 Email info@wisewoodenergy.com Date Last Modified 6116/20 Proposed System Fuel Type Forestry Residuals OperatingExisting Fossil Fuel Heating System Current heating oil consumption 21,906 gallons per year Current heating oil price $ 4.61 per gallon Subtotal: $ 100,961 sumption 22,087 gallons per year 7propanee $ 2.49 per gallon Subtotal: $ 54,911 Current electricity for heating consumption 117,889 kWh per year Current ancillary electrical use 1,582 kWh per year Current ancillary electrical demand 1.8 kW Electricity price $ 0.49 per kWh Electric demand price $ 13.65 per kW Subtotal: $ 58,565 Current wood pellet consumption 50 tons per year Current wood pellet cost $ 400 per ton Subtotal: $ 20,000 Estimated Maintenance Maintenance labor $ 12,000 per year Maintenance parts $ 6,000 per year Subtotal: $ 18,000 Existing System Cost, Total $ 252,438 Fuel' Wood use (@ % MC) 50 % Estimated wood fuel price $ 837 tons per year 95 per ton (average) Subtotal: Handling and transportation 837 tons per year Tons per delivery 5 tons per load Fuel deliveries needed 167 loads per year Loading/unloading time 1 hour per load Delivery time (round trip) 0.5 hour per load Fuel handling & delivery labor rate $ 32 per hour Subtotal: Ash Disposal Ash container capacity 1 yards Ash container removal 36 intervals Ash removal labor rate $ 32 per hour Labor for ash container removal 1.25 hour per interval Ash disposal fee $ 50 per interval Subtotal: Nctricityto Run Boiler Total electrical consumption 47,638 kWh Total electrical use charge $ 23,342 per year $ 79,502 $ 8,137 All materials contained in this document are the intellectual property of Wisewood Energy and are provided exclusively to Client. Copyright ©Wisewood Energy. All rights reserved. Total electrical demand charge $ 3,249 per year Subtotal: $ 26,591 Remaining Propane Propane use (peak and low load) 2,614 gallons Propane cost $ 2.49 per gallon Subtotal: $ 6,498 New Biomass System Operating Cost Total $ 124,023 Scheduled Maintenance Weekly and monthly boiler checklist 9 months Maintenance labor rate $ 32 per hour Monthly labor hours 31 per month Boiler water treatment $ 50 per month Annual boiler cleaning $ 2,000 per year Subtotal: $ 11,490 Remote Monitorir�ided) Remote monitoring period 9 months per year Static IP and internet connection $ 150 per month (year round) Third party remote monitoring services $ 5,625 per year Subtotal: $ 7,425 Administration' Insurance 0.3 % of Project Cost Site lease TBD Franchise fee TBD Subtotal: $ 14,345 New Biomass S stem Maintenance Costs, Total $ 33259 102,423 Estimated Year One Savings (Cost) Compared to Business As Usual $ 95,156 Notes 1. See 2018 Wood Supply and Processing Plan by Wisewood Energy for greater wood fuel supply detail. Does not include potential personnel costs to manage fuel procurement. 2. Admininstration fees are provided as an estimate only, and vary by location. Client is responsible for confirming pricing with insurer and relevant local entities. 3. Includes delivered wood fuel, fuel handling & delivery, ash disposal, and scheduled maintenance. All materials contained in this document are the intellectual property of Wisewood Energy and are provided exclusively to Client. Copyright ©Wisewood Energy. All rights reserved. Attachment 5 Capital Cost Opinion Base Option Organized Village of Kake Kake Biomass Community Energy Capital Cost Opinion Base Option Location Kake, Alaska Client Contact Gary Williams Date Last Modified 6/17/20 WISEWOOD ENERGY Proposed System Biomass Boiler Installation Project Manager Meagan Hartman Proposed Output (Ill 2,060 Email info@wisewoodenergy.com Fuel Type Forestry Residuals 010 DEVELOPMENT 0 $ - $ - $ 122,770 4.0% 011 Design & Engineering 0 $ - $ - S 117,770 3.8% 1 Architectural design 0.0 % S - 0.0% 2 Geotechnical engineering 0.0 % $ 0.0% 3 Civil engineering 0.75 % $ 22,082 0.7% 4 Structural engineering 0.75 % $ 22,082 0.7% 5 Mechanical engineering 1.50 % S 44,164 1.4% 6 Electrical engineering 1.00 % S 29,442 1.0% 012 Permits 0 $ - $ - $ 5,000 0.2% 7 Building permit EA $ 3,500 1 0 $ - $ - $ 3,500 0.1 % 8 Electrical permit EA $ 1,000 1 0 $ - $ - $ 1,000 0.0% 9 Boiler permit EA $ 500 1 0 $ - $ - S 500 0.0% 020 CIVIL 0 $ - $ - $ 49,136 1.6% 10 Site preparation SF $ 3 4,712 Included $ - $ - S 14,136 0.5% 11 Excavation and fill CV $ 100 350 Included $ - $ - S 35,000 1.1 % 030 STRUCTURAL 75 $ 12,096 $ 391,060 $ 663156 21.7% 12 Concrete foundation CY $ 1,000 260 Included $ - $ - S 260:000 8.5% 13 Boiler building (pre-engineered steel) SF $ 105 3,572 Included $ - $ 375.010 S 375,060 12.2 % 14 Windows and doors EA $ 10,000 1 48 $ 7,776 $ 10.000 S 17,776 0.6% 15 Louvers LV-01:LV-03 EA $ 2,000 3 27 $ 4,320 $ 6,000 S 10,320 0.3% 040 MECHANICAL $ 410,724 $ 1,467,129 $ 1,877853 61.3% 041 Biomass Fuel Storage and Conveyance 354 $ 57,348 $ 135,041 S 192:389 6.3% 16 Hydraulic Stoker long version incl. extinguishing module EA $ 32,878 1 128 $ 20,736 $ 32,878 S 53,614 1.8% 17 Walking Floor (4 push frames) 1.91 x 8.3m EA $ 62,192 1 80 $ 12,960 $ 62,192 S 75,152 2.5% 18 Hydraulic aggregate HAS and HSTL with emergency hydraulic EA $ 9,910 2 80 $ 12,960 $ 19,821 S 32,781 1.1 % 19 Stairs, steel EA $ 1,950 1 18 $ 2,916 $ 1,950 S 4,866 0.2% 20 Catwalk, steel EA $ 18,200 1 48 $ 7,776 $ 18,200 S 25,976 0.8% 042 Biomass Boiler 406 $ 65,772 $ 647,359 S 713,131 23.3% 21 Boilersm8h Boiler B-01 EA $ 46,803 1 80 $ 12,960 $ 46,803 S 59,763 2.0% 22 Kohlbach combustion box K8-775 CB-01 EA $ 65,548 1 128 $ 20,736 $ 65,548 $ 86,284 2.8 % 23 Compression zone EA $ 12,096 1 30 $ 4,860 $ 12,096 $ 16,956 0.6% 24 Refractory lining EA $ 11,512 1 16 $ 2,592 $ 11,512 $ 14,104 0.5% 25 Combustion air fans F-01,F-02 EA $ 2,806 2 16 $ 2,592 $ 5,612 S 8,204 0.3% 26 Grate/zone cooling F-03 EA $ 2,352 1 16 $ 2,592 $ 2,352 S 4,944 0.2% 27 Hydraulic power pack HP-01 EA $ 3,235 1 16 $ 2,592 $ 3,235 S 5,827 0.2% 28 ASME design and certification grate frame & cone EA $ 25,415 1 0 $ - $ 25,415 S 25,415 0.8% 29 Manual ash container transport system, 8001 EA $ 3,600 1 16 $ 2,592 $ 3,600 S 6,192 0.2% 30 Standard ash container with trap door for fire box and mu8tcyckme (800 1) EA $ 4,140 1 4 $ 648 $ 4,140 $ 4,788 0.2% 31 Ash pit cover EA $ 5,671 1 4 $ 648 $ 5,6718 $ 6,319 0.2% 32 Lifting traverse EA $ 1,338 1 8 $ 1,296 $ 1,338 $ 2,634 0.1 % 33 Flexible connection to standard ash container (800 1) EA $ 2,C11 1 2 $ 324 $ 2,011 S 2,335 0.1 % 34 Manual Boiler Pipe Cleaning Set EA $ 5,111 1 16 $ 2,592 $ 5,111 S 7,703 0.3% 35 Multi -Cyclone MZ-2/2 incl. double flap valve, substructure CS-03 EA $ 20,429 1 16 $ 2,592 $ 20,429 $ 23,021 0.8% 36 Main Flue Gas Fan incl. pulse damper and connections to the ducts F-05 EA $ 15,279 1 2 $ 324 $ 15,279 $ 15,603 0.5% 37 Flue Gas Recirculation primary and secondary ducts, incl. Flue gas flaps, ell CS-01 EA $ 14,232 1 4 $ 648 $ 14,232 $ 14,880 0.5% 38 Flue Gas Recirculation Fan Incl. pulse damper and connections to the ducts F-04 EA $ 12,020 1 2 $ 324 $ 12,020 S 12,344 0.4 % 39 Flue Gas Ducts, without thermal insulation, incl. elbows and connections EA $ 7,572 1 0 $ - $ 7,572 S 7,572 0.2% 40 Biomass breeching and stack FS-01 EA $ 20,000 1 0 $ - $ 20,000 $ 20,000 0.7% 41 Siemens S7-300 Control with computer visualization, modem and remote mi CS-02 EA $ 50,238 1 0 $ - $ 50,238 $ 50,238 1.6 % 42 Control for return flow increase EA $ 299 1 0 $ - $ 299 $ 299 0.0% 43 Visualization of the process with computer and modem EA $ 7,545 1 0 $ - $ 7,545 S 7,545 0.2% 44 Conversion from EU-Richtlinie to American UL-Standard EA $ 23,322 1 0 $ - $ 23,322 S 23,322 0.6% 45 Seaworthy packaging excluding boiler vessel EA $ 41,461 1 18 $ 2,916 $ 41,461 S 44,377 1.4% 46 Option Seaworthy packaging boiler vessel EA $ 13,953 1 0 $ - $ 13,953 S 13,953 0.5% 47 Vendor Installation Management EA $ 123,684 1 4 $ 648 $ 123,684 S 124,332 4.1% 48 Vendor Start up and Training EA $ 79,858 1 4 $ 648 $ 79,858 S 80,506 2.6 % 49 Vendor Supervisor electrical installation EA $ 23,023 1 4 $ 648 $ 23,023 S 23,671 0.8% 043 Propane Boiler 160 $ 25,920 $ 49,799 $ 75,719 2.5% 50 Riello Boiler B-02 EA $ 34,799 1 64 $ 10,368 $ 34,799 $ 45,167 1.5% 51 Propane breeching and stack, 25', 8- EA $ 5,000 1 64 $ 10,368 $ 5,000 S 15,368 0.5% 52 Propane tanks w/pad, 1,000 gal EA $ 10,000 1 32 $ 5,184 $ 10,000 S 15,184 0.5% 044 Hydronic Equipment - DE Plant 164 $ 21,394 $ 75,590 S 96,974 3.2% 53 Pump, boiler infeed cooling P-01, P-02 EA $ 900 2 8 $ 1,296 $ 1,800 S 3,096 0.1 % 54 Pump, if required P-03, P-04 EA $ 2,200 2 12 $ 1,944 $ 4,400 $ 6,344 0.2% 55 Pump, duplex DE loop P-05, P-06 EA $ 2,500 2 32 $ 5,000 $ 5,000 0.2% 56 Pump, unit healer P-07, P-08 EA $ 4,500 2 32 $ 5,154 $ 9,000 $ 14,184 0.5% 57 Pump, biomass combustion chamber P-09 EA $ 2,500 1 16 $ 2,592 $ 2,500 $ 5,092 0.2% 58 Pump, sump P-10, P-11 EA $ 1,705 2 4 $ 648 $ 3,410 S 4,058 0.1 % 59 Hot water buffer tank, 4,000 gal TST-01 EA $ 12,000 1 24 $ 3,888 $ 12,000 S 15,888 0.5% 60 Air separator, DE loop AS-01 EA $ 2,060 1 0 $ - $ 2,060 $ 2,060 0.1 % 61 Expansion tank, 370 gal ET-01 EA $ 6,000 1 0 $ - $ 6,000 $ 6,000 0.2% 62 Chemical dosing systems CF-01 EA $ 800 1 0 $ - $ 800 $ 800 0.0% 63 Pipe and duct insulation MD $ 1,296 20 32 $ 5,154 $ 25,920 S 31,104 1.0% 64 Flow and BTU metering ME-01 EA $ 2,700 1 4 $ 648 $ 2,700 S 3,348 0.1 % 045 Piping - DE Plant 460 $ 74,520 $ 45,340 $ 119,860 3.9% 65 Steel pipe, 6" (boiler loop) FT $ 65 120 160 $ 25,920 $ 7,800 $ 33,720 1.1% 66 Pipe fittings EA $ 120 220 160 $ 25,920 $ 26,400 S 52,320 1.7% 67 Steel valves, 6" EA $ 900 10 60 $ 9,720 $ 9.000 S 18,720 0.6% 68 Ste el valves, 2.5- EA $ 350 2 40 $ 6,480 $ 700 S 7,180 0.2% 69 Steel valves, 1.25" EA $ 120 12 40 $ 6,480 $ 1,440 $ 7,920 0.3% 046 Insulation 0 $ 12,960 $ - $ 12,960 0.4% 70 Installation labor and materials MD $ 1,296 10 0 $ 12,960 $ - S 12,960 0.4% 047 Other Mechanical Equipment 48 $ 7,776 $ 55,865 $ 63,641 2.1% 71 Air compressor AC-01 EA $ 2,500 1 8 $ 1,296 $ 2,500 $ 3,796 0.1 % 72 Chain hoist CH-01, CH-02 EA $ 1,400 2 8 $ 1,296 $ 2,800 $ 4,096 0.1 % 73 Unit heater UH-01-02 EA $ 1,565 1 8 $ 1,296 $ 1,565 S 2,861 0.1 % 74 Backup generator, 100kW propane G-01 EA $ 35,000 1 8 $ 1,296 $ 35,000 S 36,296 1.2% Copyright @ Wisewood Energy. All rights reserved. Page I of 2 75 Garage door D-01,D-02 EA UNIT $ 6,000 UNIT 2 8• $ LABOR1,296 MATLS $ 12,000 ITEM $ 13,296 0.4% 76 Exhaust fan EF-01 EA $ 2,000 1 8 $ 1,296 $ 2,000 S 3,296 0.1% 048 DE Piping Trunk Line 270 $ 43,740 $ 240,526 S 284,266 9.3% 77 PEX pipe (6") FT $ 52 244 112 $ 18,144 $ 12,688 S 30,832 1.0% 78 PEX pipe (4") FT $ 30 2,180 112 $ 18,144 $ 65,269 S 83,413 2.7% 79 PEX pipe (31/2") FT $ 26 286 24 $ 3,888 $ 7,436 S 11,324 0.4% 80 PEX pipe (2") FT $ 18 396 4 $ 648 $ 7,128 S 7,776 0.3% 81 Tees and fittings EA $ 500 32 18 $ 2,916 $ 16,000 S 18,916 0.6 % 82 Trenching FT $ 85 1,553 Included $ - $ 132,005 S 132,005 4.3% 049 Public Safety DE Connection (#1) 103 $ 16,632 $ 27,995 S 44,627 1.5% 83 PEX pipe (11/2") FT $ 9 330 27 $ 4,320 $ 2,970 S 7,290 0.2% 84 Tees and fittings EA $ 500 4 4 $ 648 $ 2,000 S 2,648 0.1% 85 Trenching FT $ 85 165 Included $ - $ 14,025 $ 14,025 0.5% 86 Building penetration and connection EA $ 2,000 1 24 $ 3,888 $ 2,000 $ 5,888 0.2% 87 Retrofits EA $ 2,000 1 24 $ 3,888 $ 2,000 $ 5,888 0.2% 88 District heating substation EA $ 5,000 1 24 $ 3,888 $ 5,000 S 8,888 0.3% 050 Boys and Girls Club DE Connection (012) 103 $ 16,632 It 19,195 $ 35,827 1.2 % 89 PEX pipe (11/2") FT $ 10 118 27 $ 4,320 $ 1,180 $ 5,500 0.2% 90 Tees and fittings EA $ 500 4 4 $ 648 $ 2,000 $ 2,648 0.1% 91 Trenching FT $ 85 59 Included $ - $ 5,015 S 5,015 0.2% 92 Building penetration and connection EA $ 3,000 1 24 $ 3,888 $ 3,000 S 6,888 0.2% 93 Retrofits EA $ 3,000 1 24 $ 3,888 $ 3,000 S 6,888 0.2% 94 District heating substation EA $ 5,000 1 24 $ 3,888 $ 5,000 $ 8,888 0.3% 051 Health Clinic DE Connection (93) 79 $ 12,744 $ 16,720 $ 29,464 1.0% 95 PEX pipe (11/2") FT $ 10 128 27 $ 4,320 $ 1,280 S 5,600 0.2% 96 Tees and fittings EA $ 500 4 4 $ 648 $ 2,000 S 2,648 0.1% 97 Trenching FT $ 85 64 Included $ - $ 5,440 $ 5,440 0.2% 98 Building penetration and connection EA $ 4,000 1 24 $ 3,888 $ 4,000 $ 7,888 0.3% 99 Retrofits EA $ 4,000 1 24 $ 3,888 $ 4,000 $ 7,888 0.3% 100 District heating substation EA $ 7,500 1 24 $ 3,888 $ 7,500 S 11,388 0.4% 052 Bingo Hall DE Connection (#5) 4 $ 648 $ 2,000 $ 2,648 0.1% 101 Tees and fittings EA $ 500 4 4 $ 648 $ 2,000 $ 2,648 0.1% 053 Senior Center DE Connection(#6) 79 $ 12,744 $ 38,740 S 51,484 1.7% 102 PEX pip. (11/2") FT $ 10 576 27 $ 4,320 $ 5,760 S 10,080 0.3% 103 Tees and fittings EA $ 500 4 4 $ 648 $ 2,000 S 2,648 0.1% 104 Trenching FT $ 85 288 Included $ - $ 24,480 S 24,480 0.8% 105 Retrofits EA $ 1,500 1 24 $ 3,888 $ 1,500 S 5,388 0.2% 106 District heating substation EA $ 5,000 1 24 $ 3,888 $ 5,000 S 8,888 0.3% 054 School DE Connection (Ill 259 $ 41,904 $ 112,959 S 154,863 5.1 % 107 PEX pipe (4") FT $ 30 736 75 $ 12,096 $ 22,036 S 34,132 1.1% 108 PEX pipe (W) FT $ 24 152 16 $ 2,592 $ 3,648 S 6,240 0.2% 109 PEX pipe(21/2") FT $ 20 34 4 $ 648 $ 680 S 1,328 0.0% 110 PEX pipe (11/2") FT $ 10 284 16 $ 2,592 $ 2,840 S 5,432 0.2% 111 Tees and fittings EA $ 500 4 4 $ 648 $ 2,000 S 2,648 0.1% 112 Trenching FT $ 85 603 Included $ - $ 51,255 S 51,255 1.7% 113 Building penetration and connection EA $ 4,000 1 48 $ 7,776 $ 4,000 S 11,776 0.4% 114 Retrofits EA $ 4,000 1 48 $ 7,776 $ 4,000 S 11,776 0.4% 115 District heating substation EA $ 7,500 3 48 $ 7,776 $ 22,500 S 30,276 1.0% 1,008 $ 163,296 $ 108,001 $ 271,296 8.9% 116 Control wiring 600 $ 97,200 $ 50.000 S 147,200 4.tl 117 Power distribution and meter connection 400 $ 64,800 $ 50,000 S 114,800 3.7% 118 Uninterruptible power supply (UPS) 8 $ 1,296 $ 8..000 S 9,296 0.3% 070 PLUMBING 8 $ Soo $ 3,000 $ ,800 0.1% 119 Sink, drains, trim, supply lines 8 $ 800 $ 3,000 S 3,800 0.1% 120 Sewer connections 080 MISCELLANEOUS 0 $ - $ - $ ,000 2.4% 081 Logistics 0 $ $ S 64,000 2.1 % 121 Crane and rigging, large EA $ 5,000 2 0 $ - $ - S 10,000 0.3% 122 Crane and rigging, small EA $ 2,000 2 0 $ $ - S 4,000 0.1% 123 Freight [o project site EA $ 50,000 1 0 $ - $ - S 50,000 1.6% 082 Inspections 0 $ - $ - S 10,000 0.3% 124 Third party inspections EA $ 5,000 2 0 $ - $ - S 10,000 0.3% 90 GENERAL CONTRACTOR 0 $ 535,852 17.5% 1 Overhead 5.0 % S 153, 101 5.0% 2 Profit 12.5 % S 382,751 12.5% 100 CONSTRUCTION ADMINISTRATION $ 214,341 7.0% 3 Construction administration 4.0 % S 122,480 4.0% 4 Installation consulting and commissioning 3.0 % S 91,860 3.0% 110 CONTRACTOR $ 128,584 5 Contractor per them MD $ 173 447 S 77,151L2�.....59/66 Contractor travel MW $ 575 89 S 51,434120 CONTINGENCY $ 457,8027 Estimating and contracting contingency 10.0 % S 305,2018 Unlisted Items allowance 5.0 % PROJECT COST S 152,601'TOTAL $ 4,398,590 13 1 _ $ :32,251 9 Estimated cost variance 18.9 % $ 32,255 ,TOTAL PROJECT COST - RISK ADJUSTED $ 5,230,845 Press shown reflect market data based on similar projects and engineering as of: 6/17/20 Notes 1. Estimated cost variance is determined at the line item level based on the certainty of the source data and aggregated to provide a risk adjusted total project cost 2. Connection costs to the planned future Greenhouse are not included because no site forthe Greenhouse has been identified Copyright @ Wisewcod Energy. All rights reserved. Page 2 of 2 Attachment 6 Capital Cost Opinion Add Alternate 1 - Including Community Center Organized Village of Kake Kake Biomass Community Energy Capital Cost Opinion - Add Alternate #1 Location Kake, Alaska Client Contact Gary Williams Date Last Modified 6117120 Proposed System Biomass Boiler Installation ad System Output (MBH) 2,060 Fuel Type Forestry Residuals WISEWOOD ENERGY Contact Meagan Hartman Email info@wisewoodenergy.com 010 DEVELOPMENT 0 $ - E - $ 28,166 10.5% 7.3% 011 Design & Engineering 0 $ - $ - E 28,166 10.5% 7.3% 1 Geotechnical engineering 2.0 % $ 4,173 1.6% 1.1 % 2 Structural engineering 5.0 % $ 10,432 3.9% 2.7% 3 Mechanical engineering 5.0 % $ 10,432 3.9% 2.7% 4 Electrical engineering 1.5 % $ 3,130 1.2% 0.8% i MEW—$ - $ - $ 1,270 0.5% 0.3% 5 Site preparation SF $ 3 90 Included $ - $ - $ 270 0.1% 0.1% 6 Excavation and fill CY $ 100 10 Included $ - $ - $ 1,000 0.4% 0.3% 030 STRUCTURAL 0 $ - $ - $ 9,000 3.4% 2.3% 7 Concrete slab and footings CY $ 3,000 3 Included $ - $ - $ 9,000 3.4% 2.3% 040 MECHANICAL 546 $ 88,444 $ 108,713 $ 197,157 73.8% 51.3% 041 Hydronic Equipment 4 $ 648 $ 11,836 $ 12,484 4.7% 3.2% 8 Air separator, heating loops AS-01 EA $ 2,266 1 0 $ - $ 2,266 $ 2,266 0.8% 0.6% 9 Expansion tank ET-01 EA $ 6,600 1 0 $ - $ 6,600 $ 6,600 2.5% 1.7% 10 Flow and BTU metering ME-01 EA $ 2,970 1 4 $ 648 $ 2,970 $ 3,618 1.4% 0.9% 042 Community Gym DE Connection 542 $ 87,796 $ 90,397 $ 178,193 66.7% 46.4% 11 Pax pipe (3 1/2") FT $ 26 1,362 136 $ 22,064 $ 35,412 $ 57,476 21.5% 15.0% 12 Steel pipe (3 1/2") FT $ 18 260 26 $ 4,212 $ 4,680 $ 8,892 3.3% 2.3% 13 Tees and fittings EA $ 500 4 2 $ 324 $ 2,000 $ 2,324 0.9% 0.6% 14 Trenching FT $ 55 551 138 $ 22,316 $ 30,305 $ 52,621 19.7% 13.7% 15 Retrofits EA $ 4,000 1 80 $ 12,960 $ 4,000 $ 16,960 6.4% 4.4% 16 District heating substation EA $ 10,000 1 80 $ 12,960 $ 10,000 $ 22,960 8.6% 6.0% 17 Building penetration and connection EA $ 4,000 1 80 $ 12,960 $ 4,000 $ 16,960 6.4% 4.4% 043 Insulation 0 $ - $ 6,480 $ 6,480 2.4% 1.7% 18 Installation labor and materials MD $ 1,296 5 0 $ - $ 6,480 $ 6,480 2.4% 1.7% 050 ELECTRICAL 40 $ 6,480 $ 51000 $ 11,480 4.3% 3.0% 19 Control wiring 20 $ 3,240 $ 2, 500 $ 5,740 2.1% 1.5% 20 Power distribution and meter connection 20 $ 3,240 $ 2, 500 $ 5,740 2.1% 1.5% 06 ISCELLANEOUS 0 $ - $ - E 00 7.5% 5.2% 061 Logistics 0 $ - $ - $ 15,000 5.6% 3.9% 21 Freight to project site 0 $ - $ - $ 15,000 5.6% 3.9% 062 Inspections 0 $ - $ - $ 5,000 1.9% 1.3% 22 Third party inspections EA $ 5,000 1 0 $ - $ - $ 5,000 1.9% 1.3% 070 GENERAL CONTRACTOR $ 40,061 15.0% 10.4% 1 Overhead 5.0 % $ 13, 354 5.0% 3.5% 2 Profit 10.0 % $ 26, 707 10.0% 7.0% 080 CONSTRUCTION ADMINISTRATION $ 18,695 7.0% 4.9% 3 Construction administration 4.0 % $ 10, 683 4.0% 2.8% 4 Installation consulting and commissioning 3.0 % $ 8,012 3.0% 2.1% 090 CONTRACTOR E 18,311 6.9% 4.8% 5 Contractor per diem MD $ 150 73 $ 10,987 4.1 % 2.9% 6 Contractor travel MW $ 500 15 $ 7,324 2.7% 1.9% 100 CONTINGENCY M 0% 10.4% 7 Estimating and contracting contingency 10.0 % $ 26,707 10.0% 7.0% 8 Unlisted items allowance PROJECT COST 5.0 % $ 13,354 $ 384,201 5.0% 3.5% ,TOTAL 110 RISK ADJUSTMENT' E 106,004 $ 106,004 $ 490,205 NA NA 9 Estimated cost variance 27.6% :TOTAL PROJECT COST - RISK ADJUSTED Prices shown reflect market data based on similar projects and engineering as of: 6117120 Notes 1. Estimated cost variance is determined at the line item level based on the certainty of the source data and aggregated to provide a risk adjusted total project cost Copyright @ Wisewood Energy. All rights reserved. Page 1 of 1 Attachment 7 25-Yr Pro Forma Base Option a o � Z s o ° a a It mml m T I `" V O - mm rn ` c 2 � m ro m C�^ m U a 75 ar c O a r a a � O.E EE C W 3 = E E ' ro O z E m w ^ E a m Attachment 8 25-Yr Pro Forma Add Alternate 1 - Including Community Center \ � \3: / ■] ! : 2 J LU _ 0 E °| \E >0o k0 \@, �![ &�! \[5[) \ [#} ) } \\%\\ �}(}}\ \ \() / \(\ § { \ ¢ ¥RER# ( Rk! # ; 7/5±; 7 )E} 2 7 (#7## 4I ; ; \\\\\ N \ \\\ \ \ #R##; § ### R R - _ _ / ƒ))!!k \ \ r % § !!{f k \ 05 05 Attachment 9 Sample Biomass Energy Price Calculations \/4(`!\¢ \ S)9\@.-m ° g r mE �5 \ \ \\\\�\�; : Elo / o o ! /QQ§\ ' | 2-6 j \ co ) ) # _\]f7 %;E ) } } ) � � � � � � � 0 0 � � CA 1-4 ► � , \}E !E o \}( \\\�\\\\\�}\