2023-09-12-minutes-solid-waste-and-maintenance

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Parametrix ENGINEERING. PLANNING. ENVIRONMENTAL SCIENCES SCOPE OF WORK Kittitas County Solid Waste Groundwater Monitoring Well, LPL Closure, Biosolids Expansion Area, and Air Permit INTRODUCTION Kittitas County Solid Waste Programs (County) owns and operates the Ryegrass Limited Purpose Landfill (LPL) located in Kittitas County, Washington. The site is currently permitted under Washington Administrative Code (WAC) 173-350-400, Limited Purpose Landfills. The current facility was reclassified as an LPL in 2004 with a planned capacity of approximately 550,000 cubic yards. Based on the results from the groundwater monitoring over the past several years, the Washington State Department of Ecology (Ecology) has requested that a monitoring well work plan be developed and executed to try to determine if the nitrates are entering the groundwater from the septage lagoons, a product of the closed Municipal Solid Waste (MWS) landfill on site, the biosolids land application, or a different unanticipated factor not related to activities on site. Once the source of the constituent is determined a plan can be developed on how to address them in a way that will meet Ecology's directive. The LPL is now nearing capacity and the County is planning a Final Closure of the LPL and beginning of Post - Closure Care. Parametrix, Inc. (Parametrix) will assist the County in updating the Ryegrass LPL Closure Plan and financial assurance documentation. Additionally, Parametrix will develop a plan for the conditioning of the soil from another County project site to be used for Final Cover of the LPL. County also owns and operates the Ryegrass Biosolids Management Facility that includes two 500,000-gallon lined septage ponds installed in 2006, west of two leachate and process wastewater ponds and a biosolids land application practice. The County is looking to add the area south of the existing LPL as a new biosolids application area. Parametrix will support the County in obtaining a modification to the existing General Permit for Biosolids Management to increase the land application area for Class I and II septage. As part of this effort, Parametrix will update the Site -Specific Land Application Plan (SSLAP) to include the new application areas, update the Plan of Operation for the septage evaporation lagoons, and evaluate alternative crop types for more effective nutrient uptake. This scope is assumed to be executed over a two-year period with the timing of each item depending on outside influences like regulations and facility capacity. Parametrix's services will be provided in accordance with the following tasks. PROJECT MANAGEMENT Throughout the course of this contract, Parametrix will provide effective project management and coordination, ensuring the scope of work is executed effectively within budget and schedule. The effort involved for Project Management is included under each task. Parametrix will: Kittitas County Solid Waste Groundwater Monitoring Well, LPL Closure, Biosolids Expansion 1 September 2023 Area, and Air Permit