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Home My WebLink AboutCIRI-ANC-CAEC MOA Transit Admin 2012-EE I T O C J P Investm Transit Ad Owner: The M Client: Alaska June 28, 2012 Project # CIR ment Gra dministrat Municipality of a Housing Fin 2 RI-ANC-CAEC ade Ene tion Buildi f Anchorage nance Corpora C-47 ergy Au ng ation udit ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 2 of 54 Project # CIRI-ANC-CAEC-47 Prepared for: The Municipality of Anchorage Transit Administration Building 3600 Dr. Martin Luther King Jr. Ave Anchorage, AK 99507 Audit performed by: Energy Audits of Alaska P.O. Box 220215 Anchorage, AK 98522 Contact: Jim Fowler, PE, CEA#1705 Jim@jim-fowler.com 206.954.3614 Prime Contractor: Central Alaska Engineering Company 32215 Lakefront Drive Soldotna, AK 99699 Contact: Jerry Herring, PE, CEA #1484 AKEngineers@starband.net 907.260.5311 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 3 of 54 TABLE OF CONTENTS 1. Executive Summary 5 2. Audit and Analysis Background 14 3. Acknowledgements 16 4. Building Description & Function 17 5. Historic Energy Consumption 19 6. Interactive Effects of Projects 19 7. Loan Program 19 APPENDICES Appendix A: Photos 21 Appendix B: AkWarm-C Report 26 Appendix C: Equipment Schedules 34 Appendix D: Additional, Building-Specific EEM detail 38 Appendix E: Specifications supporting EEM’s 43 Appendix F: Benchmark Data 48 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 4 of 54 REPORT DISCLAIMERS This audit was performed using American Recovery and Reinvestment Act (ARRA) funds, managed by the Alaska Housing Finance Corporation (AHFC). This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the savings and approximate the costs to implement the recommendations. Any modifications or changes made to a building to realize the savings must be designed and implemented by licensed, experienced professionals in their fields. Lighting recommendations should all be first analyzed through a thorough lighting analysis to assure that the recommended lighting upgrades will comply with State of Alaska Statute as well as Illuminating Engineering Society (IES) recommendations. Energy Audits of Alaska, LLC and Central Alaska Engineering Company bear no responsibility for work performed as a result of this report. Payback periods may vary from those forecasted due to the uncertainty of the final installed design, configuration, equipment selected, and installation costs of recommended Energy Efficiency Measures (EEMs), or the operating schedules and maintenance provided by the owner. Furthermore, EEMs are typically interactive, so implementation of one EEM may impact the cost savings from another EEM. Neither the auditor, Central Alaska Engineering Company, AHFC, or any other party involved in preparation of this report accepts liability for financial loss due to EEMs that fail to meet the forecasted payback periods. This audit meets the criteria of an Investment Grade Audit (IGA) per the Association of Energy Engineers definition, and is valid for one year. The life of the IGA may be extended on a case-by-case basis, at the discretion of the AHFC. IGA’s are the property of the State, and may be incorporated into AkWarm-C, the Alaska Energy Data Inventory (ARIS), or other state and/or public information system. AkWarm-C is a building energy modeling software developed under contract by AHFC. This material is based upon work supported by the Department of Energy under Award Number DE-EE0000095. This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 5 of 54 1. Executive Summary Building Owner: Municipality of Anchorage 3640 East Tudor Anchorage, AK 99507 Building contact: Jody M. Karcz Manager of Operation & Maintenance 907-343-8294 karczjm@muni.org Alaska Housing Finance Corporation P.O. Box 10120 Anchorage, AK 99510-1020 Contact: Rebekah Luhrs Energy Specialist 907-330-8141 rluhrs@ahfc.us Guidance to the reader: The Executive Summary is designed to contain all the information the building owner/operator should need to determine how the subject building’s energy efficiency compares with other similar use buildings, which energy improvements should be implemented, approximately how much they will cost and their estimated annual savings. Sections 2 through 7 of this report and the Appendices, are back-up and provide much more detailed information should the owner/operator, or their staff, desire to investigate further. This audit was performed using American Recovery and Reinvestment act (ARRA) funds to promote the use of innovation and technology to solve energy and environmental problems in a way that improves the State’s economy. The audit and this report are pre-requisites to access AHFC’s Retrofit Energy Assessment Loans (REAL) program, which is available to the building’s owner. The purpose of the energy audit is to identify cost-effective system and facility modifications, adjustments, alterations, additions and retrofits. Systems investigated during the audit included heating, ventilation, and air conditioning (HVAC), interior and exterior lighting, motors, building envelope, and energy management control systems (EMCS). ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 6 of 54 The site visit to this building occurred on April 24th, 2012. The Transit Administration building is a four-story structure housing on its first three floors, offices, an exercise and break room, small kitchenette, locker rooms and storage. Its fourth floor, or penthouse, houses the boiler, air handlers and chiller. The original building was constructed in 1984 using similar materials and exterior finishes as the adjacent transit maintenance and bus warm storage buildings. An HVAC mechanical upgrade was performed in 1994, computer server room cooling was added in 2004 and 1997 and the roof was replaced in 2010. No other known, major modifications have been made since then. Energy Consumption and Benchmark Data Benchmark utility data for 2009 and 2010 is summarized in Tables 1 and 2 below. Table 1 2009 2010 Consumption Cost Consumption Cost Electricity ‐ kWh 389,600 $ 48,385 410,280 $ 41,521 Natural Gas ‐ Therms 24,775 $ 25,915 22,127 $ 19,149 Totals $ 74,300 $ 60,670 A benchmark measure of energy use relative to other similar function buildings in the area is the Energy Use Index (EUI), which takes the total annual energy used by the facility divided by the square footage area of the building, for a value expressed in terms of kBTU/SF. This number can then be compared to other buildings to see if it is average, higher or lower than similar buildings in the area. Likewise, the Energy Cost Index (ECI) is the cost of all energy used by the building expressed in $/SF of building area. Comparative values are shown in Table 2 below. Table 2 – 2009 & 2010 Average EUI and ECI Transit Administration Building APD Training Facility APD Headquarters Continental US Average** Energy Use Index (EUI) ‐ kBTU/SF 195 228 177 72‐109 Energy Cost Index (ECI) ‐ $/SF $3.55 $4.56 $4.03 ‐ ** Data retrieved from the US Energy Administration database, these figures are for “Office Buildings”, the most relevant category tracked by the USEA. Evaluation of energy consumption & benchmark data As observed in Table 1 above, consumption of natural gas (NG) decreased by ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 7 of 54 10% and consumption of electricity increased by 5% from 2009 to 2010. Assuming the building’s HVAC operating conditions remained the same from 2009 to 2010 (which is questionable), the decreased NG consumption would have to be identified as weather related. The increase is electrical consumption is a result of the noticeable reduction in KWh usage in the winter and spring of 2009 (see monthly consumption graph in Appendix F). It was not clear to the auditor or on site personnel what caused this reduction, although the auditor’s best guess is that it is related to higher usage of the building’s air conditioning. Two similar-use comparison buildings were chosen in Table 2. The table shows that the subject building’s energy use per square foot falls slightly above the APD headquarters and 15% below the APD training facility’s EUI. The ECI’s are not in line with the EUI’s because of the much higher cost per BTU of electricity versus NG. See Chart 1 below for additional information on this point. As is typical for Alaskan buildings, a comparison to similar buildings in the continental US shows Alaska buildings have a much higher EUI – which is to be expected given the weather differences. A deeper analysis of the energy consumption of these three buildings follows: Chart 1 Chart 1 above shows the subject building’s gas and electrical EUI compared to the two other similar use buildings. 0 20406080100120140160 Transit Administration Building ADP Training Facility ADP Headquarters Natural Gas EUI Electrical EUI ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 8 of 54 Natural gas consumption: All three of the buildings have a combination of offices, kitchenette’s and break rooms. The auditor audited all three of these buildings, and having done so, believes that APD Training facility’s higher NG consumption results from two factors: the firing range’s high exhaust rate and subsequent make-up air heating, and HVAC settings that are not optimized. This second point is also contributing to the subject building’s higher (than APD Headquarters) NG consumption.. Electrical consumption: Based on Chart 1, the subject building’s electrical consumption is higher than expected, especially considering building occupancy. The subject building’s occupancy is 1.3 people per 1000 square feet while both of the other buildings carry 2.6 people per 1000 square feet. The APD Training facility’s excessive electrical consumption is a result of its co-tenant’s (Management Information Systems Data Center - MISD) large computer server bank and related large tonnage of required cooling. The auditor believes HVAC, probably cooling, is the cause of the subject building’s higher than expected electrical consumption. Recommended Energy Efficiency Measures Various Energy Efficiency Measures (EEMs) have been analyzed for this building to determine if they would provide energy savings with reasonably good payback periods. EEMs are recommended for reasons including: 1.) they have a reasonably good payback period 2.) for code compliance 3.) end of life (EOL) replacement 4.) reasons pertaining to efficient building management strategy, operations, maintenance and/or safety All the EEMs considered for this facility are detailed in the attached AkWarm-C Energy Audit Report in Appendix B and in Appendix D. Each EEM includes payback times, estimated installation costs and estimated energy savings. The summary EEM’s that follow are the only EEM’s that are recommended for this building. Others have been considered but are not deemed to be justified or cost effective. The recommended EEM’s were selected based on consideration from three perspectives: overall efficiency of building management, reduction in energy consumption and return on investment (ROI). Efficient building management dictates, as an example: that all lights be upgraded, that lamp inventory variations be minimized and that all appropriate rooms have similar occupancy controls and setback thermostats - despite the fact that a single or several rooms may have an unjustifiably long payback on ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 9 of 54 their individual lighting or controls upgrade. Some of the summary EEM’s below contain individual EEM’s that are grouped by type (i.e. all relevant lighting upgrades are summed and listed as a single upgrade, all thermostat setback retrofits are grouped together and listed as a single upgrade, etc.). They are prioritized as a group, with the highest ROI (shortest payback) listed first. Table 3 at the end of this section summarizes these EEM’s and Appendix B (the AkWarm-C detailed report) and Appendix D provide additional detail pertaining to each individual recommendation. A.) SETBACK THERMOSTATS It is generally assumed when a building has an electronic HVAC control system as does this building, that it should be programmed with night time and unoccupied temperature setbacks. This is frequently not the case and there efficiencies to be gained. It is recommended to confirm this, and adjust the DDC programming to the current building’s usage and occupancy. The cost of this evaluation is included in the re-commissioning EEM in “C” below and in Appendix B-4. It is also recommended to replace all existing, local, low voltage adjustable thermostats controlling the unit heaters (UH’s) and cabinet unit heaters (CUH’s) with programmable digital models, and program them with night time setback temperatures. The cost for the thermostat upgrade is below. Appendices B-1 and B-19 provide detail for this EEM. Combined Setback Thermostat EEM’s: Estimated cost $ 2,600 Annual Savings $ 3,585 Payback 9 months B.) REFRIGERATION & REFRIGERATED VENDING MACHINES There are three older, full size residential type refrigerators and three refrigerated beverage vending machines in this building. It is recommended to replace the full size refrigerators at their EOL with Energy Star versions, and to add VendingMisers (see www.vendingmiser.com) to each refrigerated beverage vending machine. These EEM’s are found in Appendix B-5 & B-8. Combined refrigeration EEM’s: Estimated cost (incremental difference for each refrigerator + VendingMiser) $ 975 Annual Savings $ 925 Payback 1 year ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 10 of 54 C.) HVAC SYSTEM It is recommended to re-commission the HVAC system in this building. The building’s high NG EUI, the observed 100% open outside air (OSA) dampers on AHU3-1 and the 10% increase in electrical consumption during the winter and spring of 2010 all indicate that the HVAC controls are not optimized for this building’s current occupancy and use. Furthermore, it is recommended to add Variable Frequency Drives (VFD’s) to the 20 HP fan motor in AHU3-1, the 5 HP fan motor in RF3-1. See Appendix D-2 for additional detail on VFD’s, and appendix B-4 for more detail on cost and savings. HVAC VFD EEM: Estimated cost $ 20,508 Annual savings $ 12,703 Payback 1.6 years D.) DESKTOP COMPUTERS Desktop PC’s with a single LCD monitor consume between 200 and 300 watts when in use. An additional monitor, depending on it age, consumes an additional 30-50 watts. Laptops consume between 50 and 100 watts when in use, and their power settings can be adjusted to further reduce consumption throughout the day. It is recommended to replace the 34 desktop PC’s with laptops at their EOL. The incremental difference in cost is estimated to be $200 each. See Appendix B-17 & B-18. Combined Personal Computer EEM’s: Estimated cost $ 6,802 Annual savings $ 3,024 Payback 2.3 years E.) MOTOR REPLACEMENTS WITH PREMIUM EFFICIENCY The (4) 5 HP or larger motors in this building are listed in Appendix C. Two did not have nameplates accessible to determine their rated operating efficiencies, but both of these motors have insufficient operating hours to cost justify replacement with premium efficiency versions. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 11 of 54 The 5 HP motor in RF3-1 and the 20 HP motor in AHU3-1 should be replaced with premium efficiency motors at their EOL. See Appendix D-3. Motor replacement EEM: Estimated incremental cost to replace 2 motors at EOL with premium eff. $ 950 Annual Savings $ 307 Payback 3.1 years F.) LIGHTING AND LIGHTING CONTROLS The original T12 lamps and magnetic ballasts on the first and second floors of this building have been replaced with T8 lamps and electronic ballasts and the parking lot lighting has been replaced with LED lighting. It is not clear to the auditor when this change took place, so it was assumed to have taken place prior to the 2009/2010 benchmark period (and input into AkWarm-C accordingly). It is recommended to complete the building-wide lighting upgrade using energy saver lamps. Energy saver lamps have a slight reduction in light output (from 2.9% to 5%) but a relatively large energy savings (from 12% to 25%). Sample light readings taken during the audit indicate that the reduction should not be noticed. It is further recommended to replace all of the standard T8 lamps with energy saver lamps at the next building re-lamp and to replace the remaining exterior high pressure sodium (HPS) wall packs with LED wall packs. It is also recommended to add occupancy sensors to all rooms. This EEM summarizes Appendix B-2, 3, 6, 7, B-9 through 16, B- 16, and B-20 through 36. See Appendix E for more information on occupancy sensors and energy saver lamps. Combined Lighting Control EEM’s: Estimated cost $ 31,869 Annual Savings $ 6,789 Payback 4.7 years ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 12 of 54 A summary of the estimated cost totals and estimated annual savings totals of the eight (A. through E.) summary EEM’s listed above, is found in Table 3 below, and again at the end of Appendix B. Table 3 Combined total of recommended EEM’s summarized above: Estimated total cost $ 63,704 Annual Savings (including maintenance savings) $ 27,333 Simple payback 2.3 years Does not include design or construction management costs In addition to EEM’s, various Energy Conservation Measures (ECM’s) are recommended. ECM’s are policies or procedures to be followed by management and employees that require no capital outlay. ECMs recommended for this facility include: 1. Turn lights off when leaving a room that is not controlled by an occupancy sensor. 2. All man-doors, roll-up doors and windows should be properly maintained and adjusted to close and function properly. 3. Turn off computers, printers, faxes, etc. when leaving the office. Utilize desk plug load management devices like the “Isola” product found in Appendix E, which turns selected desk equipment off when the occupant leaves his or her desk, and back on when they return. 4. Re-configure building occupants and activities (in the case of the Rec Center) to group un-occupied offices (i.e. no tenant or staff using the space) or little used spaces, into the same HVAC zone so that zone’s energy consumption can be set back to minimal levels. 5. A building is a living mini-ecosystem and its use changes. Re- evaluate building usage annually and confirm that building set points, zones, lighting levels, etc. are optimized for the current usage and occupancy. 6. Lamp replacement should be a scheduled, preventative maintenance activity. Re-lamp the entire building or entire usage zones (a zone of the building that has similar lighting usage, so ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 13 of 54 lamps have roughly the same lifetime) as part of a scheduled preventative maintenance routine. This assures all lamps are the same color temperature (e.g. 2700K, 3000K, etc.) which enhances occupant comfort and working efficiency. It also minimizes expense because it is more cost effective to order large quantities of the same lamp, and more labor efficient to dedicate maintenance staff to a single re-lamp activity in a building zone, rather than replace individual lamps as they fail. 7. Replace HVAC filters regularly. Maintain optimal operation of all dampers, actuators, valves and other HVAC components. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 14 of 54 2. Audit and Analysis Background Program Description: This audit included services to identify, develop, and evaluate energy efficiency measures for the subject building. The scope of this project included evaluating the building shell, lighting, hot water generation and HVAC equipment. The auditor may or may not identify system deficiencies if they exist. The auditor’s role is to identify areas of potential savings, many of which may require more detailed investigation and analysis by other qualified professionals. a. Audit Description and Methodology: Preliminary audit information was gathered in preparation for the site survey, including benchmark utility consumption data, floor and lighting plans, and equipment schedules where available. A site visit is then performed to inventory and evaluate the actual building condition, including: i. Building envelope (walls, doors, windows, etc) ii. Heating, ventilating, and air conditioning iii. Lighting systems and controls iv. Building specific equipment v. Plumbing Systems b. Benchmark Utility Data Validation: Benchmark utility data provided through AHFC’s initial phase of their REAL program is validated, confirming that meter numbers on the subject building match the meters from which the energy consumption and cost data were collected. If the data is inaccurate or missing, new benchmark data is obtained. In the event that there are inconsistencies or gaps in the data, the existing data is evaluated and missing data points are interpolated. c. Method of Analysis: The information gathered prior to the site visit and during the site visit is entered into AkWarm-C, an energy modeling software program developed specifically for AHFC to identify forecasted energy consumption. The forecasts can then be compared to actual energy consumption. AkWarm-C also has some pre-programmed EEM retrofit options that can be analyzed with projected energy savings based on occupancy schedules, utility rates, building construction type, building function, existing conditions, and climatic data uploaded to the program based on the zip code of the building. When new equipment is proposed, energy consumption is calculated based on manufacturer’s cataloged information. Energy cost savings are calculated based on the historical energy costs for the building. Installation costs include the labor and equipment required to implement an EEM retrofit, but design and construction management costs are excluded. Cost estimates are +/- 30% for this level of audit, and are derived from one or more of the following: Means Cost Data, industry publications, experience of the auditor, local contractors and/or equipment suppliers. Brown Electric, Haakensen Electric, Proctor Sales, Pioneer Door, ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 15 of 54 and J.P. Sheldon, all in Anchorage, were consulted for some of the lighting, boiler, overhead door and air handling retrofit and/or replacement costs. Maintenance savings are calculated, where applicable, and are added to the energy savings for each EEM. The costs and savings are considered and a simple payback period and ROI is calculated. The simple payback period is based on the number of years that it takes for the savings to pay back the net installation cost (Net Installation costs divided by Net Savings.) In cases where the EEM recommends replacement at EOL, the incremental cost difference between the standard equipment in place, and the higher efficiency equipment being recommended is used as the cost basis for payback calculation. The SIR found in the AkWarm-C report is the Savings to Investment Ratio, defined as the annual savings multiplied by the lifetime of the improvement, divided by the initial installed cost. SIR’s greater than 1.0 indicate a positive lifetime ROI. The life-time for each EEM is entered into AkWarm-C; it is estimated based on the typical life of the equipment being replaced or altered. d. Limitations of the Study: All results are dependent on the quality of input data provided, and may only act as an approximation. Most input data such as building and equipment usage, occupancy hours and numbers, building and HVAC operating hours, etc. was provided to the auditor by on site personnel. In some instances, several methods may achieve the identified savings. This report is not a design document. A design professional, licensed to practice in Alaska and in the appropriate discipline, who is following the recommendations, shall accept full responsibility and liability for the results. Budgetary estimates for engineering and design of these projects in not included in the cost estimate for each EEM recommendation, but these costs can be approximated at 15% of the cost of the work. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 16 of 54 3. Acknowledgements: We wish to acknowledge the help of numerous individuals who have contributed information that was used to prepare this report, including: a. Alaska Housing Finance Corporation (Grantor): AHFC provided the grant funds, contracting agreements, guidelines, and technical direction for providing the audits. AHFC reviewed and approved the final short list of buildings to be audited based on the recommendation of the Technical Service Provider (TSP). b. The Municipality of Anchorage (Owner): MOA provided a review and brief history of the benchmarked buildings, building selection criteria, building plans, equipment specifications, building entry and coordination with on-site personnel. c. Central Alaska Engineering Company (Benchmark TSP): CAEC oversaw the compilation of electrical and natural gas consumption data through their subcontractor, Energy Audits of Alaska, LLC. CAEC also entered that data into the statewide building database, called the Alaska Retrofit Information System (ARIS). CAEC was awarded the auditing contract for this MOA building. d. Energy Audits of Alaska (energy auditor): This firm has been selected to provide audits under this contract. The firm has two mechanical engineers, certified as energy auditors and/or professional engineers and has also received additional training from CAEC and other TSP’s to acquire further specific information regarding audit requirements and potential EEM applications. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 17 of 54 4. Building Description and Function: The site visit and survey of subject building occurred on April 24th, 2012, the outside ambient temperature was 45F. This is a four story building totaling 19,022 square feet, as calculated from plans. The 7,144 square foot first floor consists of locker rooms, the dispatch office, a kitchenette and break room. This is the only floor used outside of normal office hours. The second and third floors contain offices, conference rooms, break rooms and storage rooms, together they total 9,749 square feet. The fourth floor, or penthouse as it is called in building plans, has 2,129 square feet and consists of the boiler room, fan room and chiller room. For its size, the building has a relatively low occupancy, averaging 25 full time occupants plus 30-50 bus drivers passing through at the beginning and end of their shifts. This building is constructed on a 5” concrete slab poured on grade over a vapor barrier. Walls are constructed of steel framing and metal studs with a metal finished, 2” structural insulated panel as the building’s exterior surface. The composite wall insulation value, as calculated by AkWarm-C, is R-39.7. The roof has two layers of 3” rigid foam insulation over a steel deck, covered with an EPDM membrane. It’s insulation value is R-32.7. All interior walls are finished with gypsum. The windows in this building are double pane glass in aluminum frames and in good condition. Overall, the building is in above average condition. Building details are as follows: a. Heating, Cooling, Ventilation and Controls: Heat is provided by (2) gas fired, 87% efficient, cast iron sectional boilers that provide heat via hydronic baseboard radiators, unit heaters, cabinet unit heaters and heating coils in the air handler (AHU) and variable air volume boxes (VAV’s). Ventilation is provided by an AHU. Building cooling is provided by a 20 Ton chiller located in the penthouse mechanical room and a 3 Ton ceiling mounted air conditioner on the first floor. Computer server room cooling is provided by a drycooler and condenser located outside the north side of the building. The unit heaters, cabinet unit heaters and server room cooling are controlled by local, low voltage thermostats. Overall building HVAC controls are a combination of Landis & Gyr and Seimens Apogee electronic control systems using low voltage sensors and adjustable thermostats throughout the building. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 18 of 54 b. Appliances: There are (5) residential type refrigerators, a residential electric range/oven and several small microwaves and coffee machines in the building. This building has 34 PC’s in use at various times of day. c. Plumbing Fixtures: This building contains a total of (9) toilets, (5) urinals, (16) lavatory sinks and (2) showers, all with manual valves. (3) of the toilets consume 1.6 gallons per flush (gpf), the other (6) used 3.5 gpf, (4) of the urinals use 1.6 gpf and (4) use 1.0 gpf. See Appendix D-1 for EEM recommendations. d. Domestic Hot Water: Hot water for sinks and showers is provided by a gas fired, 80 gallon hot water heater which looks as if it is soon to be replaced. An brand new Amtrol WHS-80ZCDW indirect hot water generator is still in its carton in the boiler room. e. Interior Lighting & Controls: As previously mentioned, the lighting in this building is original T12 lamps and magnetic ballasts except for the first floor and a small portion of the second floor which has been upgraded to T8 lamps and electronic ballasts. There are (8) occupancy sensors in the building, all located in toilet rooms. Room lighting generally consists of T12-40 watt or T8-32 watt, 2-lamp, U-tube fixtures. Appendix B details the recommendation of a full lighting upgrade. See Appendix E for additional information on occupancy sensors and energy saver lamps. There are (7) florescent exit signs in the building, as well as a large number of unlit or self-luminous exit signs. f. Exterior Lighting: There are (5) HPS-100 watt wall pack lights on the exterior of this building. The parking lot pole lights have been retrofitted with LED lights. g. Building Shell: The building shell is described earlier; it appears to be in good condition inside and out. h. Motors: There are 4 large (5 HP or larger) motors in use in this building. They are listed in Appendix C and were considered for replacement with premium efficiency motors, see Appendix D-4. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 19 of 54 5. Historic Energy Consumption: Energy consumption is modeled within the AkWarm-C program. The program typically analyzes twelve months of data. Two year’s worth of natural gas and electricity consumption were averaged then input into AKWarm-C. This monthly data is found in Appendix F. Energy consumption was analyzed using two factors: the Energy Cost Index (ECI) and the Energy Use Index (EUI). The energy cost index takes the annual costs of natural gas and electrical energy over the surveyed period of time (two years) divided by the square footage of the building. The ECI for this building is $3.55/SF, the ECI for two very similar buildings, the APD Headquarters and APD Training buildings, are $4.03 and $4.56 respectively. The energy use index (EUI) is the total annual average electrical and heating energy consumption expressed in thousands of BTU/SF. The average of the 2009 and 2010 EUI for this building is 195 kBTU/SF; the average 2009/2010 EUI for the APD Headquarters building is 177 kBTU/SF and 228 kBTU/SF for the APD Training building. The average for “Places of Public Assembly” buildings across the US is 72-109 kBTU/SF as logged by the US Energy Information Administration. This source data can be viewed at: www.eia.gov/emeu/efficiency/cbecstrends/cbecs_tables_list.htm. 6. Interactive Effects of Projects: The AkWarm-C program calculates savings assuming that all recommended EEM are implemented in the order shown in Appendix B. Appendix D EEM’s are not included in the AkWarm-C model unless referred to in the Appendix B EEM as “see also Appendix D-X”; in these cases, the EEM is included in the AkWarm-C calculations. If some EEMs are not implemented, savings for the remaining EEMs will be affected, in some cases positively, and in others, negatively. In general, all projects were evaluated sequentially so that energy savings associated with one EEM would not be attributed to another EEM as well. By modeling the recommended projects sequentially, the analysis accounts for interactive effects between the EEMs and does not “double count” savings. Interior lighting, plug loads, facility equipment, and occupants generate heat within the building. When the building is in cooling mode, these contribute to the overall cooling demands of the building; therefore lighting efficiency improvements will reduce cooling requirements on air conditioned buildings. Conversely, lighting efficiency improvements are anticipated to increase heating requirements slightly. Heating penalties resulting from reductions in building electrical consumption are included in the lighting analysis that is performed by AkWarm-C. 7. Loan Program: The Alaska Housing Finance Corporation (AHFC) Alaska Energy Efficiency Revolving Loan Fund (AEERLF) is a State of Alaska program enacted by the Alaska Sustainable Energy Act (senate Bill 220, A.S. 18.56.855, ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 20 of 54 “Energy Efficiency Revolving Loan Fund). The AEERLF will provide loans for energy efficiency retrofits to public facilities via the Retrofit Energy Assessment for Loan System (REAL). As defined in 15 AAC 155.605, the program may finance energy efficiency improvements to buildings owned by: a. Regional educational attendance areas; b. Municipal governments, including political subdivisions of municipal governments; c. The University of Alaska; d. Political subdivisions of the State of Alaska, or e. The State of Alaska Native corporations, tribal entities, and subsidiaries of the federal government are not eligible for loans under this program. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 21 of 54 Appendix A - Photos South side of subject building; bus warm storage in background, uses same building system as subject building and adjacent transit maintenance building Server room drycooler. pumps and compressor on north side of building ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 22 of 54 First floor locker & changing room, dispatch office in background First floor break room ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 23 of 54 First floor kitchenette 1984 florescent exit signs ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 24 of 54 Original steam boiler no longer in use Existing gas fired hot water heater and its replacement ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 25 of 54 Aerial View of the Transit Administration Building NORTH Transit Administration Building Appendix B – Detailed AkWarm-C report Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Transit Administration Building Page 26 ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 6/28/2012 1:01 PM General Project Information PROJECT INFORMATION AUDITOR INFORMATION Building: Transit Administration Building Auditor Company: Energy Audits of Alaska Address: 3600 Dr. Martin Luther King Jr. Ave Auditor Name: James Fowler City: Anchorage Auditor Address: P.O. Box 220215 Anchorage, AK 99522 Client Name: Jody M. Karcz Client Address: 3600 Dr. Martin Luther King Jr. Ave Anchorage, AK 99507 Auditor Phone: (206) 954‐3614 Auditor FAX: Client Phone: (907) 343‐8294 Auditor Comment: Client FAX: Design Data Building Area: 19,022 square feet Design Heating Load: Design Loss at Space: 872,189 Btu/hour with Distribution Losses: 969,099 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 1,477,285 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Typical Occupancy: 25 people Design Indoor Temperature: 70 deg F (building average) Actual City: Anchorage Design Outdoor Temperature: ‐18 deg F Weather/Fuel City: Anchorage Heating Degree Days: 10,816 deg F‐days Utility Information Electric Utility: Chugach Electric ‐ Commercial ‐ Lg Natural Gas Provider: Enstar Natural Gas ‐ Commercial ‐ Lg Average Annual Cost/kWh: $0.157/kWh Average Annual Cost/ccf: $0.843/ccf Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Refrigerat ion Other Electrical Cooking Ventilation Fans Service Fees Total Cost Existing Building $18,450 $4,017 $2,443 $14,712 $3,082 $25,742 $0 $12,548 $1,973 $82,966 With Proposed Retrofits $6,117 $5,134 $2,501 $8,752 $2,237 $22,796 $0 $6,674 $1,973 $56,184 SAVINGS $12,333 ‐$1,118 * ‐$58 $5,960 $845 $2,945 $0 $5,874 $0 $26,783 * Space cooling costs increase as a result of reduction in outside air in Ventilation EEM B‐4 Appendix B – Detailed AkWarm-C report Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Transit Administration Building Page 27 $0 $20,000 $40,000 $60,000 $80,000 $100,000 Existing Retrofit Service Fees Ventilation and Fans Space Heating Space Cooling Refrigeration Other Electrical Lighting Domestic Hot Water Annual Energy Costs by End Use Appendix B – Detailed AkWarm-C report Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Transit Administration Building Page 28 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 1 Setback Thermostat: Office Areas Implement a Heating Temperature Unoccupied Setback to 55.0 deg F for the Office Areas space. $3,386 $1,000 43.72 0.3 2 Lighting ‐ Combined Retrofit: Common Area: Incandescent, OS added to circuit under previous EEM Replace with 4 FLUOR CFL, A Lamp 15W and Remove Manual Switching and Add new Occupancy Sensor $174 $61 17.59 0.4 3 Lighting ‐ Combined Retrofit: Offices: T8‐ 2lamp, OS added to circuit under previous EEM * At next building re‐lamp replace (5) T8‐32 watt lamps with 5 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $56 $31 11.05 0.6 4 HVAC and Ventilation (see also Appendix D‐2) Add VFD's to AHU3‐1 20 HP fan motor and RF3‐1 5 HP return fan motor at an estimated cost of $8508; Yaskawa software savings percentages used in AkWarm for retrofit watts. Perform a re‐ commissioning of the building's HVAC at an estimated cost of $12,000, estimated savings calculated in AkWarm‐C by reducing OSA from 58% to 15%. $12,703 $20,508 9.93 1.6 5 Refrigeration ‐ Power Retrofit: Residential Refrigerator Replace with 3 Energy Star version at EOL @ incremental cost of $75 ea $212 $225 11.01 1.1 6 Lighting ‐ Power Retrofit: Exterior: HPS‐100, wall pack ** Replace with 5 LED 34W Module StdElectronic $227 + $50 Maint. Savings $375 8.69 1.7 7 Lighting ‐ Power Retrofit: Offices: Incandescent, OS not needed Replace with 6 FLUOR CFL, A Lamp 15W $126 $90 8.69 0.7 Appendix B – Detailed AkWarm-C report Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Transit Administration Building Page 29 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 8 Refrigeration ‐ Controls Retrofit: Vending Machine Add new Seasonal Shutdown $713 $750 5.87 1.1 9 Lighting ‐ Power Retrofit: Common Area: T8‐2lamp, already OS At next building re‐lamp replace (8) T8‐32 watt lamps with 8 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic $41 $48 5.29 1.2 10 Lighting ‐ Combined Retrofit: Offices: T12‐1lamp, elec ballast, already OS Replace with 6 FLUOR T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and Improve Occupancy Sensor $58 $91 3.96 1.6 11 Lighting ‐ Combined Retrofit: Offices: T12‐1lamp, OS added to circuit under previous EEM Replace with 2 FLUOR T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $19 $31 3.88 1.6 12 Lighting ‐ Combined Retrofit: Common Area: T8‐2lamp, U‐ type, add OS At next building re‐lamp replace (63) T8‐32watt lamps with 63 FLUOR (2) T8 F32T8 30W U‐Tube Energy‐Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $1,110 $1,778 3.86 1.6 13 Lighting ‐ Power Retrofit: Common Area: T8‐1lamp, already OS At next building re‐lamp replace (4) T8‐32 watt lamps with 4 FLUOR T8 4' F32T8 28W Energy‐Saver Instant StdElectronic $7 $12 3.52 1.8 14 Lighting ‐ Combined Retrofit: Offices: Incandescent, add OS Replace with 12 FLUOR CFL, A Lamp 15W and Remove Manual Switching and Add new Occupancy Sensor $419 $780 3.32 1.9 15 Lighting ‐ Combined Retrofit: Offices: T12‐1lamp, elec ballast, OS not needed Replace with 4 FLUOR T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and Controls retrofit $21 $60 2.99 2.8 Appendix B – Detailed AkWarm-C report Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Transit Administration Building Page 30 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 16 Lighting ‐ Power Retrofit: Offices: T8‐ 2lamp, already OS At next building re‐lamp replace (2) T8‐32 watt lamps with 2 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic $5 $12 2.67 2.3 17 Other Electrical ‐ Combined Retrofit: Desktop computer with 2 LCD monitors Replace with 17 Laptop at EOL @ incremental cost of $200 ea and Improve Manual Switching $1,575 $3,401 2.12 2.2 18 Other Electrical ‐ Combined Retrofit: Desktop Computers Replace with 17 Laptop at EOL @ incremental cost of $200 ea and Improve Manual Switching $1,449 $3,401 1.95 2.3 19 Setback Thermostat: Mechanical and Storage Areas Implement a Heating Temperature Unoccupied Setback to 55.0 deg F for the Mechanical and Storage Areas space. $199 $1,600 1.60 8.1 20 Lighting ‐ Combined Retrofit: Offices: T8‐ 2lamp, U‐type, add OS At next building re‐lamp replace (5) T8‐32 watt lamps with 96 FLUOR (2) T8 F32T8 30W U‐Tube Energy‐Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $1,021 $3,976 1.59 3.9 21 Lighting ‐ Power Retrofit: Exit Signs Replace with 7 LED 4W Module StdElectronic $59 + $70 Maint. Savings $700 1.56 11.9 22 Lighting ‐ Combined Retrofit: Common Area: T8‐2lamp, add OS At next building re‐lamp replace (5) T8‐32 watt lamps with 5 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $100 $430 1.44 4.3 23 Lighting ‐ Combined Retrofit: Offices: T12‐2lamp, add OS *** Replace with 22 FLUOR (2) T8 4' F32T8 28W Energy‐Saver lamps and Leviton “Zipline” kit with Instant StdElectronic and Improve Manual Switching $733 + $220 Maint. Savings $5,640 1.42 7.7 Appendix B – Detailed AkWarm-C report Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Transit Administration Building Page 31 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 24 Lighting ‐ Combined Retrofit: Common Area: T8‐1lamp, add OS At next building re‐lamp replace (14) T8‐32 watt lamps with 14 FLUOR T8 4' F32T8 28W Energy‐Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $144 $642 1.39 4.5 25 Lighting ‐ Combined Retrofit: Offices: T12‐2lamp, elec ballast, U‐type, add OS Replace with 52 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver lamps and Leviton “Zipline” kit with Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $1,018 $4,560 1.38 4.5 26 Lighting ‐ Combined Retrofit: Mechanical/Storage: T12‐2lamp, 96'' length, add OS Replace with 4 FLUOR (2) T8 8' F96T8 57W Energy‐ Saver lamps and Leviton “Zipline” kit with StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $108 + $40 Maint. Savings $1,280 0.89 11.8 27 Lighting ‐ Combined Retrofit: Offices: T12‐2lamp, U‐type, add OS Replace with 6 FLUOR (2) T8 F32T8 30W U‐Tube Energy‐Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $191 + $60 Maint. Savings $2,420 0.87 12.7 28 Lighting ‐ Combined Retrofit: Mechanical/Storage: T12‐2lamp, add OS Replace with 6 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver lamps and Leviton “Zipline” kit with Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $96 + $60 Maint. Savings $1,920 0.63 20 29 Lighting ‐ Combined Retrofit: Mechanical/Storage: T12‐2lamp, U‐type, OS added to circuit under previous EEM Replace with 3 FLUOR (2) T8 F32T8 30W U‐Tube Energy‐Saver Instant HighEfficElectronic and Remove Manual Switching and Add new Occupancy Sensor $48 + $30 Maint. Savings $1,111 0.59 23.2 Appendix B – Detailed AkWarm-C report Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Transit Administration Building Page 32 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 30 Lighting ‐ Combined Retrofit: Offices: T12‐1lamp, elec ballast, add OS Replace with 14 FLUOR T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $132 $1,410 0.58 10.6 31 Lighting ‐ Combined Retrofit: Offices: T12‐2lamp, elec ballast, add OS Replace with 11 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver lamps and Leviton “Zipline” kit with Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $214 $2,430 0.54 11.4 32 Lighting ‐ Combined Retrofit: Offices: T12‐1lamp, add OS Replace with 2 FLUOR T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $38 + $20 Maint. Savings $900 0.50 23.4 33 Lighting ‐ Combined Retrofit: Mechanical/Storage: T8‐2lamp, add OS At next building re‐lamp replace (4) T8‐32 watt lamps with 4 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $34 $424 0.50 12.4 34 Lighting ‐ Combined Retrofit: Mechanical/Storage: T12‐2lamp, elec ballast, U‐type, add OS Replace with 3 FLUOR (2) T8 F32T8 30W U‐Tube Energy‐Saver Instant StdElectronic and Remove Manual Switching and Add new Occupancy Sensor $33 $445 0.46 13.4 35 Lighting ‐ Power Retrofit: Common Area: T8‐2lamp, OS not needed At next building re‐lamp replace (2) T8‐32 watt lamps with 2 FLUOR (2) T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic $1 $12 0.35 17.5 36 Lighting ‐ Controls Retrofit: Offices: CFL 2lamp, 4‐tube, plug‐ in, add OS Remove Manual Switching and Add new Occupancy Sensor $6 $200 0.19 33.4 Appendix B – Detailed AkWarm-C report Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Transit Administration Building Page 33 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) The following EEM’s were calculated outside of AkWarm‐C and may not consider the interactive affect of any other EEM’ above, unless specifically stated otherwise. They are not in order of priority or savings, relative to the EEM’s above. Appe ndix D‐1 Plumbing Fixtures: (12) W.C., (5) urinals, (16) lavatories, (2) showers Replace shower heads and lavatory fixtures with low flow versions; replace lavatory valves with proximity sensing on/off controls, retrofit residential toilet valves with dual flush valves, replace urinals with ultra‐ low flow and proximity sensing controls Appe ndix D‐3 Motor replacements 2 known motors to be replaced at EOL with premium efficiency versions, see Appendix D‐ for details. $307 $950 3.1 6.4 TOTAL $26,783 + $550 Maint. Savings $63,704 5.07 2.4 Sample translations of the nomenclature used above: * (item 3) During the next building re-lamp (i.e. when the lamps were to be replaced anyway, so the cost is the incremental difference between a 32 watt and 28 watt lamp, estimated to be $3 ea), replace the (5) T8-32 watt lamps with T8-28 watt “energy saver” lamps; the fixture has a standard electronic ballast; also replace the existing manual switches with the appropriate number and type of occupancy sensors. Occupancy sensors cost from $200 -$300 ea installed. ** (item 6) Remove ballast and replace existing (5) exterior HPS 100watt bulbs, assumed to use E26 or 27 sockets, add an A-type E26 34watt LED bulb. *** (item 23) Replace the (22) existing sets of T12, 2-lamp “tombstone” end caps and magnetic ballast with (22) sets of T8 end caps and instant start ballasts using a kit such as Leviton “Zipline” (estimated cost $200/kit installed); replace T12-40 watt lamps with T8-28 watt energy saver lamps (estimated cost $10/lamp). Replace the manual switches with the appropriate number and type of occupancy sensors. ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ AkWarmCalc Ver 2.2.0.3, Energy Lib 5/18/2012 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 34 of 54 Appendix C – Equipment Schedules ALL SCHEDULES COMPILED FROM PLANS OR ON‐SITE NAMEPLATE OBSERVATION, WHERE ACCESSIBLE e= estimated COOLING, HEATING AND AIR HANDLING UNIT SCHEDULE SYMBOL MFGR/MODEL FAN CFM MOTOR DATA HP/VOLTS/PH REMARKS AHU3‐1 Trane 31 14,900 20/460/3; 87.5% 663.7 MBH heating; 250 MBH cooling; located in penthouse mech room (1984); OSA dampers 100% open CH‐1 Trane RAUG‐C20; 20 Ton , 250 MBH (2) 1/460/3 Condensing Unit located in penthouse mech room (1984) ‐ fan 20/460/3 Condenser pump CAC‐1 Liebert; 3 Ton mini‐mate2; 27,500 MBH sensible 1.4FLA/480/3 Ceiling mounted (2004) ACU‐1 Liebert ‐ Condenser unit 6.4FLA/460/3 located outside north of building; serves computer server room CAC‐1 DCU‐1 Liebert DDO033A drycooler (2007) 1250 3/460/3 2 pumps, 1.5 HP ea; serves computer server room 2/460/2 Fan EXHAUST FAN SCHEDULE SYMBOL MOTOR MFGR/MODEL CFM MOTOR DATA HP/VOLTS/PH REMARKS EF3‐1 Trane 16B1 2100 1/460/3 exhausts toilet rooms EF3‐2 Trane 10B1 330 .17/115/1 conference room exhaust EF3‐3 Trane 10B1 700 .17/115/1 lunch and exercise room exhaust EF3‐4 Pace U‐6F 365 .17/115/1 conference utility room RF3‐1 Trane 31 9,150 5/460/3; 87.5% main bldg return fan; located in penthouse ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 35 of 54 mech room PUMP SCHEDULE SYMBOL MFGR/MODEL GPM MOTOR DATA HP/VOLTS/PH REMARKS CP‐1 Grundfos UPS 50‐160F e130 1300w/460/3 Main glycol circ; HOA switch on "hand" CP‐2 Marathon e130 3/460/3 Alternate; HOA "off" CP‐3 Grundfos UPS 15‐42 e12 85w/115/1 DHW re‐circ CP‐5 Grundfos UPS 15‐55 e5 56w/115/1 DCW circulation CP3‐7 not on plans, no nameplate e100 2/460/3 HWS circ pump; HOA switch on "hand" CP3‐8 not on plans, no nameplate e100 2/460/3 Alternate; HOA "off" BOILER SCHEDULE SYMBOL MFGR/MODEL GPM MOTOR DATA HP/VOLTS/PH REMARKS B3‐1 Burnham FDO/24 .25/115/1 856 MBH input, 744 MBH output, 87% efficient B3‐1 Burnham FDO/24 .25/115/1 856 MBH input, 744 MBH output, 87% efficient UNIT HEATER SCHEDULE SYMBOL MFGR/MODEL CFM MOTOR DATA HP/VOLTS/PH REMARKS UH3‐1 Trane 18‐S; 3 MBH 280 .04/115/1 penthouse mech room UH3‐2 Trane 42S; 16 MBH 591 .05/115/1 penthouse mech room UH3‐3 Trane 100‐‐S; 48 MBH 1535 .125/115/1 penthouse mech room CUH3‐1 Trane E‐02; 12 MBH 200 .02/115/1 vestibule main entry CUH3‐2 Trane E‐03; 17 MBH 300 .02/115/1 vestibule west entry CUH3‐3 Trane E‐03; 17 MBH 300 .02/115/1 vestibule east entry HOT WATER HEATER SCHEDULE ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 36 of 54 SYMBOL MFGR/MODEL GALLONS NUMBER OF ELEMENTS ELEMENT SIZE HWG‐1 In‐Sink‐erator H‐770 on demand 750w/120/1 located in second floor kitchenette P‐18 State SBA‐80 500 E4 80 1500MBH gas fired PLUMBING FIXTURES SYMBOL FIXTURE GPF QUANTITY REMARKS W.C. 1.6 3 manually operated Urinal 1.6 1 manually operated W.C. 3.6 9 manually operated Urinal 1.0 4 manually operated Lavatory ‐ 16 manually operated Shower 2.6 2 EQUIPMENT SCHEDULES SYMBOL FIXTURE QUANTITY MOTOR DATA HP/VOLTS/PH REMARKS Controls Compressor ‐ ACP 2 1/208/3 In‐sink‐erator garbage disposal Model 77 1 second floor kitchenette Range/Oven 1 electric; residential type Elevator ‐ cable type ‐ HH‐3‐1 1 15/460/3 Refrigerated Beverage Vending Machine 3 3000 KWh/yr Residential Refrigerator > 10 yrs old 3 800 KWh/yr Residential Refrigerator < 10 yrs old 2 400 KWh/yr PLUG LOAD SUMMARY SYMBOL FIXTURE QUANTITY MOTOR DATA HP/VOLTS/PH REMARKS Personal offee Machine 5 450w Large Copy/Printer 5 1200w Personal Printer 4 85w Personal Heaters 7 750w‐ 1500w/115/1 Large Plan Printer ‐ HP 1 Large TV 2 450w Small TV 2 Microwave 3 Shredder 1 Radio Charger 6 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 37 of 54 Projector 1 Toaster Oven 1 LIGHTING SCHEDULE FIXTURE TYPE DESCRIPTION LAMPS MOUNTING NUMBER WATTS TYPE HEIGHT Wall pack HPS ‐ Exterior, magnetic ballast 1 100 surface 10' Pole Light Pole mounted, LED, Exterior 1 115 Pole 30' Recess can CFL, plug‐in 2 18 recess ceiling T8‐1 Florescent, T8 lamps, electronic ballast 1 32 surface ceiling T8‐2 Florescent, T8 lamps, electronic ballast 2 32 surface ceiling T8‐2 U Florescent, T8 lamps, U‐type, electronic ballast 2 32 surface ceiling T12‐1 Florescent T12, magnentic ballast 1 40 surface ceiling T12‐1 Florescent T12, electronic ballast 1 40 surface ceiling T12‐1 U Florescent T12, U‐type, magnentic ballast 1 40 surface ceiling T12‐1 U Florescent T12, U‐type, electronic ballast 1 40 surface ceiling T12‐2 Florescent T12, magnentic ballast 2 40 surface ceiling T12‐2 Florescent T12, electronic ballast 2 40 surface ceiling T12‐2 Florescent T12, 96'' length, magnentic ballast 2 40 surface ceiling Circline 12" Florescent circline lamp 1 surface ceiling Incandescent floor, table and desk lamps 1 60 surface 4' Recess can Incandescent, interior 1 75 recess ceiling LARGE MOTOR SCHEDULE Motor use & location (5 HP or larger) HP/Volts/Ph Existing Efficiency Premium Efficiency Estimated annual usage (hrs) Annual Savings Burn‐out payback (yrs/cost) Replacement payback (yrs/cost) Elevator 15/110/3 uknown 93.00% 109 Insufficient operating hours AHU3‐1 20/460/3 87.5% 93.00% 3120 $ 280.33 1.8/$500 6.8/$1900 CH‐1 20/460/3 unknown 93.00% 336 Insufficient operating hours RF3‐1 5/460/3 87.5% 89.50% 3120 $ 26.48 5.7/$150 22.7/$600 Efficiency ratings at Full Load, per nameplate e = estimated because nameplate not accessible or information not on nameplate Payback figures based on power consumption at 66% of full load Cable elevator motor used up and down ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 38 of 54 Appendix D Additional, Building-Specific EEM details Appendix D-1: Plumbing fixtures: All urinals should be retrofitted or be replaced with ultra low flow models. The lavatory faucets and urinals should be retrofitted with proximity sensing on/off controls. All 3.5 gpf toilets in this building should be replaced with 1.6 gpf versions. All manual urinal and lavatory faucet valves would be replaced with proximity sending valves. All toilet valves should be retrofitted with dual flush valves (see below). This audit does not include water usage and AkWarm-C does not allow for the modeling of it, but a typical ultra low flow urinal (1 pint to ½ gallon per flush) can save up to 66% of water used, and typically pays back within 3 years, depending on usage. Dual flush toilet valves will typically pay back within 1-3 years, depending on usage. These payback periods are reduced by 66% or more if the fixture or valve is replaced at its EOL rather than while it’s still functioning. For an EOL replacement, the cost used is the incremental difference in cost between an ultra-low-flow fixture and a straight across replacement with the same fixture. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 39 of 54 Appendix D-2: Variable Frequency Drives (VFD’s) If outfitted with a VFD and a programmable input device (PID) which responds to a process parameter such as duct pressure or temperature for an AHU or suction or discharge pressure on a pump, a motor has the capability to only produce enough power to meet the demand. There is tremendous savings potential resulting from the relationship between motor load required and resulting fluid or air flow (Affinity Laws). As an example, if 100% of the air flow requires 100% motor’s horsepower, the Affinity laws state that 70% of air (or fluid) flow requires only 34% of the horsepower. By necessity, fan motors and pumps have to be sized for the worst case load scenario, but under normal operating conditions (80-90% of the time), need only be operating at 30%-70% of their full load. VFD’s are recommended for larger, 3-phase motors that are under varying load and duty cycles, such as air handlers, glycol circulation pumps and reciprocating compressor motors. The 20 HP supply fan motor in AHU3-1 and the 5 HP return fan motor in RF3-1 in this building are recommended to be retro-fitted with VFD’s. These motor loads and consumption were evaluated using software called, “Energy Predictor”, provided by Yaskawa, a manufacturer of VFD’s; excerpts from the detailed software reports are found below. A 68%-69% reduction in electrical consumption is predicted by the Yaskawa software for these fan motors; these figure were input into AkWarm-C as a reduction in power consumption in the ventilation section; the resulting savings are included in Appendix B-4. Note that the percentage reduction in consumption predicted by the Yaskawa software was used in AkWarm-C, rather than the actual KWh reduction energy reduction. Overstated savings: It is important to note that if other EEM’s are also incorporated, these savings will be over- stated because they are based solely on the reduction in electrical consumption resulting from the motor speed reduction. When a fan or compressor motor speed is reduced, GPM or CFM is also reduced, so the motor will have to operate at slightly higher load and speed to maintain building parameters, which will erode a small percentage of the electrical savings. Neither the Yaskawa software or the AkWarm-C software has the capability to calculate this iterative condition. The Yaskawa reports follow: ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 40 of 54 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 41 of 54 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 42 of 54 Appendix D-3: Premium Efficiency Motor upgrades It is generally recommended that all motors, 5HP or larger, operating for 1500 hrs per year, or more, at continuous speed, be replaced at EOL with premium efficiency motors. Motors operating for 5000 hours per year, or more, can be replaced with premium efficiency motors prior to burn out, with a justifiable payback. Motors in this building, 5HP and larger, are listed in Table 5 below, along with recommendations for cost effective replacement at burn-out and for immediate replacement. There are two instances in this building of cost effective motor replacement with premium efficiency motors at burn out. Table 4 LARGE MOTOR SCHEDULE Motor use & location (5 HP or larger) HP/Volts/Ph Existing Efficiency Premium Efficiency Estimated annual usage (hrs) Annual Savings Burn‐out payback (yrs/cost) Replacement payback (yrs/cost) Elevator 15/110/3 uknown 93.00% 109 Insufficient operating hours AHU3‐1 20/460/3 87.5% 93.00% 3120 $ 280.33 1.8/$500 6.8/$1900 CH‐1 20/460/3 unknown 93.00% 336 Insufficient operating hours RF3‐1 5/460/3 87.5% 89.50% 3120 $ 26.48 5.7/$150 22.7/$600 Efficiency ratings at Full Load, per nameplate e = estimated because nameplate not accessible or information not on nameplate Payback figures based on power consumption at 66% of full load Cable elevator motor used up and down ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 43 of 54 Appendix E – Specifications supporting EEM’s Lighting Controls Occupancy sensors sense the presence of occupants, turn the lights on at a pre-determined level, and then turn the lights off after a programmed time period of no occupancy. Line of sight, motion sensing occupancy sensors can be installed in existing duplex switch boxes, as well as on ceilings. Dual technology sensors are typically ceiling mounted in rooms, lavatories, corridors, vehicle bays and storage areas where obstacles may interfere with line-of-sight sensors. The second technology in these sensors activates lighting based on sound or changes in position, and work even when a person is fully obscured by an obstacle. Zoned occupancy controls are typically recommended for long corridors, large vehicle bays and large storage areas with multiple switches and lighting zones. Zoned controls are designed to activate and de- activate lighting by zone, by row, or even by fixture, based on the location of the occupant. Occupancy sensors can reduce power consumption by 25-60%. Paybacks on occupancy sensors range from 1 to 5 years, depending on the light fixture consumption and occupancy of the room. Lighting Management Systems (LMS) today have the capability to manage lighting based on a wide variety of parameters including building usage, daylight conditions and occupancy. They are retro-fittable, and can be stand alone or integrated into a building’s HVAC, alarm or other control systems. Additionally, they can be easily re-configured as a building’s usage or occupancy pattern changes. Sample LMS systems and a sample high bay occupancy sensor (which could be used for zone lighting control) follow. ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 44 of 54 Appendix E – Lighting Controls ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 45 of 54 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 46 of 54 Appendix E – Energy Saver T8 29 and 31 watt U-Tube lamps ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 47 of 54 Appendix E – Sample desk plug load management device ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 48 of 54 Appendix F – Benchmark Data $0 $500 $1,000 $1,500 $2,000 $2,500 $3,000 $3,500 $4,000 $4,500 $5,000 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Jan‐09Mar‐09May‐09Jul‐09Sep‐09Nov‐09Jan‐10Mar‐10May‐10Jul‐10Sep‐10Nov‐10Natural Gas Cost ($)Natural Gas Consumption (Therms)Date (Mon ‐Yr) Transit Admin ‐Natural Gas Consumption (Therms) vs. Natural Gas Cost ($) Natural Gas Consumption (Therms) Natural Gas Cost ($) $0 $500 $1,000 $1,500 $2,000 $2,500 $3,000 $3,500 $4,000 $4,500 $5,000 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 Jan‐09Mar‐09May‐09Jul‐09Sep‐09Nov‐09Jan‐10Mar‐10May‐10Jul‐10Sep‐10Nov‐10Electric Cost ($)Electric Consumption (kWh)Date (Mon ‐Yr) Transit Admin ‐Electric Consumption (kWh) vs. Electric Cost ($) Electric Consumption (kWh) Electric Cost ($) ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 49 of 54 REAL Preliminary Benchmark Data Form PART I – FACILITY INFORMATION Facility Owner Facility Owned By Date MOA Municipal Government/Subdivision 04/24/12 Building Name/ Identifier Building Usage Building Square Footage Transit Admin Bldg Other 19,022 Building Type Community Population Year Built Mixed 261,500 9999 Facility Address Facility City Facility Zip 3650 E Tudor Rd Bldg A Anchorage 99517 Contact Person First Name Last Name Middle Name Email Phone Sheila Willis 343‐8148 Mailing Address City State Zip MOA Maintenance Admin Anchorage AK Primary Operating Hours Monday‐ Friday Saturday Sunday Holidays 09:00‐ 05:00 Average # of Occupants During Operating Hours ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 50 of 54 Transit Admin Bldg Buiding Size Input (sf) = 19,022 2009 Natural Gas Consumption (Therms) 24,775.00 2009 Natural Gas Cost ($) 25,915 2009 Electric Consumption (kWh) 389,600 2009 Electric Cost ($) 48,385 2009 Oil Consumption (Therms) 0.00 2009 Oil Cost ($) 0 2009 Propane Consumption (Therms) 0.00 2009 Propane Cost ($) 0.00 2009 Coal Consumption (Therms) 0.00 2009 Coal Cost ($) 0.00 2009 Wood Consumption (Therms) 0.00 2009 Wood Cost ($) 0.00 2009 Thermal Consumption (Therms) 0.00 2009 Thermal Cost ($) 0.00 2009 Steam Consumption (Therms) 0.00 2009 Steam Cost ($) 0.00 2009 Total Energy Use (kBtu) 3,807,205 2009 Total Energy Cost ($) 74,300 Annual Energy Use Intensity (EUI) 2009 Natural Gas (kBtu/sf) 130.2 2009 Electricity (kBtu/sf) 69.9 2009 Oil (kBtu/sf) 0.0 2009 Propane (kBtu/sf) 0.0 2009 Coal (kBtu/sf) 0.0 2009 Wood (kBtu/sf) 0.0 2009 Thermal (kBtu/sf) 0.0 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 51 of 54 2009 Steam (kBtu/sf) 0.0 2009 Energy Utilization Index (kBtu/sf) 200.1 Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf) 1.36 2009 Electric Cost Index ($/sf) 2.54 2009 Oil Cost Index ($/sf) 0.00 2009 Propane Cost Index ($/sf) 0.00 2009 Coal Cost Index ($/sf) 0.00 2009 Wood Cost Index ($/sf) 0.00 2009 Thermal Cost Index ($/sf) 0.00 2009 Steam Cost Index ($/sf) 0.00 2009 Energy Cost Index ($/sf) 3.91 2010 Natural Gas Consumption (Therms) 22,127.00 2010 Natural Gas Cost ($) 19,149 2010 Electric Consumption (kWh) 410,280 2010 Electric Cost ($) 41,521 2010 Oil Consumption (Therms) 0.00 2010 Oil Cost ($) 0 2010 Propane Consumption (Therms) 0.00 2010 Propane Cost ($) 0 2010 Coal Consumption (Therms) 0.00 2010 Coal Cost ($) 0 2010 Wood Consumption (Therms) 0.00 2010 Wood Cost ($) 0 2010 Thermal Consumption (Therms) 0.00 2010 Thermal Cost ($) 0 2010 Steam Consumption (Therms) 0.00 2010 Steam Cost ($) 0 2010 Total Energy Use (kBtu) 3,612,986 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 52 of 54 2010 Total Energy Cost ($) 60,670 Annual Energy Use Intensity (EUI) 2010 Natural Gas (kBtu/sf) 116.3 2010 Electricity (kBtu/sf) 73.6 2010 Oil (kBtu/sf) 0.0 2010 Propane (kBtu/sf) 0.0 2010 Coal (kBtu/sf) 0.0 2010 Wood (kBtu/sf) 0.0 2010 Thermal (kBtu/sf) 0.0 2010 Steam (kBtu/sf) 0.0 2010 Energy Utilization Index (kBtu/sf) 189.9 Annual Energy Cost Index (ECI) 2010 Natural Gas Cost Index ($/sf) 1.01 2010 Electric Cost Index ($/sf) 2.18 2010 Oil Cost Index ($/sf) 0.00 2010 Propane Cost Index ($/sf) 0.00 2010 Coal Cost Index ($/sf) 0.00 2010 Wood Cost Index ($/sf) 0.00 2010 Thermal Cost Index ($/sf) 0.00 2010 Steam Cost Index ($/sf) 0.00 20010 Energy Cost Index ($/sf) 3.19 Note: 1 kWh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF ≈ 1,000 Btu's ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 53 of 54 Natural Gas Btus/CCF =100,000 Month Start Date End Date Billing Days Consumption (CCF) Natural Gas Cost ($) Unit Cost ($/Therm) Jan‐09 1/6/2009 2/5/2009 33 4550 $4,624 $0.00 Feb‐09 2/6/2009 3/5/2009 33 3611 $3,988 $0.00 Mar‐09 3/6/2009 4/2/2009 28 2597 $2,670 $0.00 Apr‐09 4/3/2009 5/7/2009 32 2353 $2,422 $0.00 May‐09 5/8/2009 6/4/2009 28 1262 $1,329 $0.00 Jun‐09 6/5/2009 7/6/2009 33 1084 $1,151 $0.00 Jul‐09 7/7/2009 8/6/2009 30 867 $934 $0.00 Aug‐09 8/7/2009 9/4/2009 32 991 $1,058 $0.00 Sep‐09 9/5/2009 10/6/2009 29 923 $990 $0.00 Oct‐09 10/7/2009 11/5/2009 28 1323 $1,391 $0.00 Nov‐09 11/6/2009 12/3/2009 30 2153 $2,224 $0.00 Dec‐09 12/4/2009 1/7/2010 31 3061 $3,134 $0.00 Jan‐10 1/8/2010 2/4/2010 32 3256 $2,758 $0.00 Feb‐10 2/5/2010 3/4/2010 28 2737 $2,328 $0.00 Mar‐10 3/5/2010 4/8/2010 31 2628 $2,238 $0.00 Apr‐10 4/9/2010 5/6/2010 32 1996 $1,734 $0.00 May‐10 5/7/2010 6/3/2010 27 1392 $1,230 $0.00 Jun‐10 6/4/2010 7/8/2010 33 1405 $1,241 $0.00 Jul‐10 7/9/2010 8/5/2010 29 760 $702 $0.00 Aug‐10 8/6/2010 9/2/2010 34 983 $897 $0.00 Sep‐10 9/3/2010 10/7/2010 30 895 $826 $0.00 Oct‐10 10/8/2010 11/4/2010 29 1230 $1,095 $0.00 Nov‐10 11/5/2010 12/2/2010 28 1761 $1,520 $0.00 Dec‐10 12/3/2010 1/2/2011 31 3084 $2,580 $0.00 Jan ‐ 09 to Dec ‐ 09 total: 24,775 $25,915 Jan ‐ 10 to Dec ‐ 10 total: 22,127 $19,149 Jan ‐ 09 to Dec ‐ 09 avg: $0.00 Jan ‐ 10 to Dec ‐ 10 avg: $0.00 ENERGY AUDITS OF ALASKA TRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 54 of 54 Electricity Btus/kWh =3,413 Month Start Date End Date Billing Days Consumption (kWh) Total Electric Cost ($) Unit Cost ($/kWh) Jan‐09 12/8/2008 1/7/2009 30 27880 $3,947 $0.14 Feb‐09 1/7/2009 2/6/2009 30 29040 $4,138 $0.14 Mar‐09 2/6/2009 3/10/2009 32 24520 $3,534 $0.14 Apr‐09 3/10/2009 4/8/2009 29 28880 $3,828 $0.13 May‐09 4/8/2009 5/8/2009 30 31160 $4,253 $0.14 Jun‐09 5/8/2009 6/8/2009 31 35240 $4,756 $0.13 Jul‐09 6/8/2009 7/8/2009 30 36120 $4,209 $0.12 Aug‐09 7/8/2009 8/6/2009 29 39680 $4,537 $0.11 Sep‐09 8/6/2009 9/4/2009 29 36280 $4,201 $0.12 Oct‐09 9/4/2009 10/6/2009 32 32880 $3,712 $0.11 Nov‐09 10/6/2009 11/5/2009 30 33920 $3,670 $0.11 Dec‐09 11/5/2009 12/7/2009 32 34000 $3,600 $0.11 Jan‐10 12/7/2009 1/5/2010 29 32680 $3,325 $0.10 Feb‐10 1/5/2010 2/5/2010 31 33920 $3,317 $0.10 Mar‐10 2/5/2010 3/9/2010 32 33880 $3,060 $0.09 Apr‐10 3/9/2010 4/8/2010 30 30480 $3,476 $0.11 May‐10 4/8/2010 5/10/2010 32 34240 $3,570 $0.10 Jun‐10 5/10/2010 6/9/2010 30 33040 $3,819 $0.12 Jul‐10 6/9/2010 7/9/2010 30 36200 $3,510 $0.10 Aug‐10 7/9/2010 8/9/2010 31 34400 $3,817 $0.11 Sep‐10 8/9/2010 9/9/2010 31 38120 $3,817 $0.10 Oct‐10 9/9/2010 10/7/2010 28 37800 $3,414 $0.09 Nov‐10 10/7/2010 11/8/2010 32 33040 $3,172 $0.10 Dec‐10 11/8/2010 12/8/2010 30 32480 $3,224 $0.10 Mar ‐ 09 to Feb ‐10 total: 389600 $48,385 Mar ‐ 10 to Feb ‐ 11 total: 410280 $41,521 Mar ‐ 09 to Feb ‐10 avg: $0.13 Mar ‐ 10 to Feb ‐ 11 avg: $0.10