4.9. SR 06-03-2013 - Laserfiche WebLink

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Project Approach In our discussions so far with GRE we have focused on delivering a liquid product(1-2%solids) to their facility. Should that option not prove feasible,then the City should consider exploring with GRE the possibility of sending GRE a thickened product. There are two thickening options, sending GRE a product that is 5-8%solids or a cake product that is nearing 20%solids.A 5-8%solids product can still be pumped relatively efficiently using the correct pump.A cake product may require a different type of handling process in order to get the product to GRE. Though the thickening options will be more expensive than the current option laid out in the facility plan,these alternative options that include thickening would be substantially less costly than the heat drying option. For this task, Bolton&Menk will attend meetings as necessary with GRE,the City of Elk River, MPCA and others. In addition, Bolton&Menk will prepare revised options and cost estimates if the additional thickening options are discussed. Task 3: Provide Engineering Analysis of Existing System and Answer Operational Questions Description:We have already evaluated the treatment facility as part of the Facility Plan and Bolton &Menk has a good understanding of the existing facility based on our meetings with the operations staff. Based on this,we feel that we can move through this task rather quickly and move onto other key design issues.However,we will meet with City staff and operations staff to review our findings and continue our previous discussions. Bolton&Menk employs not only engineering staff that is very knowledgeable with wastewater treatment operations,but also employs licensed wastewater operators that hold Class A and Class B wastewater licenses. Our operations staff have been part of meetings during the facility planning process and they are familiar with the City.The Bolton& Menk operations staff will be available to the City operations staff to assist with any operational questions. Regarding operational questions,Bolton&Menk welcomes questions and input from all City staff,but particularly from the operations staff. The operations staff will be the individuals working with and operating the new treatment facility. In our opinion,it is critical to have the input of the City operations staff during the design process as this allows for a successful project. Task 4: Review Existing Discharge Permit and Assist with Permit Modification Description:The City is waiting for the final draft NPDES permit from the MPCA. Bolton& Menk will continue to assist the City with this process and will also assist with working through the permit modification phase of the project. Once the City has determined exactly what design improvements will occur,we will assist the City in the process of modifying the permit. The NPDES permit will be modified to include the proposed improvements and the permit will include interim and final limits. It is our expectation that the interim and final limits will be the same or similar to the expected limits from the upcoming permit. Task 5: Attend Meetings and Make Presentation to City Council, Great River Energy, and the MPCA Description: Bolton&Menk will attend all meetings necessary for the successful completion of the project. This includes meetings with the City,GRE,the MPCA, and any other persons or groups as necessary to move the project through design. Meetings with the City include those with City staff, operations staff and the City Council. Wastewater Treatment Facility Improvements I City of Elk River, Minnesota 2