Opening of Proposals - WWTP Solar Guaranteed Energy Savings Contract Proj. No. 124-015 - Ameresco

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