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Elk River <br />Municipal Utilities <br />13069 Orono Parkway <br />Elk River, MN 55330 <br />June 6, 2007 <br />To: Elk River Municipal Utilities Commission <br />Jerry Takle <br />Jerry Gumphrey <br />Jim Tralle <br />From: Bryan Adams <br />Subject: Landfill Gas Facility <br />phone: 763.441.2020 <br />Fa 763.441.8099 <br />As you may recall, last year we experienced premature head and valve failure on the engines at <br />the landfill. The failure was thought to be high hydrogen sulfide from sheet rock in the landfill. <br />Further testing by Waste Management has confirmed our thoughts but the hydrogen sulfide <br />concentration is much higher than anticipated. Waste Management is now pursuing isolating the <br />effected wells with an alternate piping system and installing a candlestick flare for those wells <br />only. This modification takes a revision to the air permit by MPCA. MPCA is not noted for <br />their speed and efficiency, and this may take some time. <br />In a related issue, Waste Management has installed additional gas wells and has enough gas to <br />supply two more engines. Our initial intent was to expand the landfill gas electric generation <br />facility when the landfill expands. Waste Management is not hopeful that the landfill will be <br />expanded. The cost of the land to the south is far above what Waste Management desires to pay. <br />Does this commission desire to pursue adding two more units? This would probably be a stand- <br />alone facility. The estimated cost is in the $2,000,000 range and I am sure Sherburne County <br />would finance this again but that will be verified. There is a complicating factor. Due to the <br />perceived price for renewable energy, Waste Management may desire to do this addition on their <br />own. <br />