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Attachment D <br />SL4TING CENTER <br />Menio <br />To: Mr. Lonnie Brokke, Parks, and Recreation Director <br />From: Brad Tullberg, Skating Center Superintendent <br />Date: November 8, 2011 <br />Re: Skating Center Energy Usage Update <br />The following information is an update of the energy use at the Roseville Skating Center as of <br />August 3 1, 2011. <br />Skatins! Center Natural Gas Us <br />Goal <br />Our goal for 2011 is to realize a 3 % reduction natural gas, usage from 20 10. <br />Actual Consumption Update <br />From January I through August 31, natural gas, consumption (in therms) is up 17.7% as <br />compared to the same period in 2010. <br />Summary <br />The rise in Skating Center natural gas, usage is due to two major factors: <br />1) The OVAL snow melt pit uses, natural gas, to heat the water circulating in the piping. The <br />snow melt pit uses, OVAL compressor waste heat when available. <br />2) On average, temperatures, were 1.1 degrees, colder in March of 2011 compared to March <br />2010. Also, April 2011 temperatures, were 9 degrees, colder than April of 2010 which has <br />contributed to the additional gas, consumption due to the need to heat the arena. Wan-n <br />weather this Fall should help us, to get us, closer to our goal. We will continue to closely <br />monitor natural gas, consumption. <br />