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AMERESCO4 <br />Green - Clean - Sustainable <br />ECM 8: Interior & Exterior Lighting Upgrades <br />Savings Unit <br />kWh <br />Guaranteed <br />619,378 <br />Verified <br />671,011 <br />kW <br />2,010 <br />2,081 <br />Therm <br />-6,856 <br />-7,297 <br />Dollars <br />$76,957 <br />$83,300 <br />Overview of ECM <br />This measure included the installation of new LED lighting at Arvada Center, Arvada Water Treatment Plant, City Hall, <br />City Hall Annex, Indiana Shops, Lake Arbor Cart Bldg., Old Towne Parking Lot, Ralston Water Treatment Plant, Streets <br />Maintenance, West Woods Golf Maintenance, and Wastewater Operations. In addition to saving energy due to the <br />installation of much more efficient lighting technology, LED lighting enhances the quality, consistency, and color <br />rendering of the lighting system, while meeting all applicable codes and standards. <br />Commissioning <br />After the installation of the ECM, commissioning activities were performed in accordance with Schedule Q of the EPC. <br />In order to verify proper installation during construction, Ameresco confirmed operation of all fixtures as they were <br />completed. Additionally, light levels were measured for a sample of the installed fixtures. Light level readings are shown <br />in Appendix E. <br />Measurement & Verification <br />The M&V Plan for this ECM was based on IPMVP Option A — Retrofit Isolation Using a Key -Parameter Measurement. <br />Savings for this ECM were calculated using a line -by-line lighting spreadsheet to determine the baseline and proposed <br />energy consumption for each lighting fixture included in the audit. Fixture quantities, fixture wattages, and hours of <br />lighting operation are the key variables entered into the spreadsheet calculation that determine the savings. <br />For this ECM, the key parameter being measured is pre and post installation fixture wattage. Any changes to fixture <br />types and/or quantities were updated in the as -built spreadsheet provided to Ameresco by the lighting contractor. The <br />hours of operation are set forth in the lighting calculations and in Schedule D of the EPC, and they remain unchanged in <br />calculating the verified savings. Wattage measurements were grouped and averaged by fixture type to determine the <br />actual wattage values that were used to update the as -built savings calculation. <br />Pre and post installation wattage measurements were taken on a sample of the fixtures throughout the facilities. These <br />measured wattages were then inserted into the as -built lighting spreadsheet calculation for each building to calculate <br />the verified savings. The lighting power measurements are shown in Appendix F. <br />The tables on the following page show the rated and measured wattages for the existing and new fixture types that <br />were measured. The 2nd and 3rd columns show the fixture quantities from the original and as -built scope, respectively. <br />The 4t" and 5t" columns show the rated watts and measured watts, respectively. The 6th, 7t", and 8t" columns show the <br />total kWh associated with each measured fixture type for the original scope, as -built scope with the rated watts, and <br />the as -built scope with the measured watts. These details help to quantify the impact that the as -built and M&V <br />processes have on the verified savings. <br />City of Arvada, Colorado I Project #37213 1 M&V Report — Year 2 1 Page 18 <br />