4.4. SR 03-20-2017 - Laserfiche WebLink

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SECTION 1.0 INTRODUCTION 1.1 Purpose The City of Elk River owns and operates a mechanical wastewater treatment facility serving the residents of Elk River as well as commercial and industrial users within the community. Upon completion of current facility improvements, a treatment capacity of 4.54 million gallons per day (MGD) will be provided with activated sludge, media filtration, ultraviolet disinfection and land application of anaerobically digested biosolids. Waste Management owns and operates a landfill north of Elk River that generates leachate from both municipal solid waste (MSW) and construction and demolition waste (C&D) at a rate of approximately 35,000 gallon per day (gpd). Actual rates will vary seasonally based on precipitation, however, this evaluation is based on an average daily leachate rate of 35,000 gpd. The leachate is currently stored on-site and transported by truck to the Metropolitan Council wastewater system where it is treatment at a facility with a design capacity of more than 30 MGD. The Elk River landfill was opened in 1972 and is projected to remain open through 2063. This report evaluates the impact of leachate on the Elk River treatment processes and evaluates conveyance alternatives to pump the leachate from the landfill to the existing Elk River collection system. This preliminary engineering report is step 1 as outlined in the Memorandum of Understanding between the City of Elk River and Waste Management of Minnesota, Inc. for landfill leachate and municipal biosolids disposal. A copy of the memorandum of understanding is provided as Appendix A. 1.2 Report Organization To address the treatment facility evaluation the report is organized into the following sections: Section 1: Introduction Section 2: Elk River Wastewater Treatment and Characteristics Section 3: Waste Management Leachate Characteristics Section 4: Leachate Treatment Evaluation Section 5: Conveyance Alternatives Section 6: Recommendations and Implementation City of Elk River, Minnesota —121.109643 Page 5 Elk RiveriWaste Management Leachate Study Prepared by Bolton & Menk, Inc.