Item A-MWMC Facilities Plan - Laserfiche WebLink

Home Browse Search

1. INTRODUC'[ION, PURPOSE AND NEED desirability and priority of alternatives, providing recommendations on policy issues, and assisting in communication and public awareness. Collectively, the groups' charge was to bring forward a plan to the MWMC for its adoption to manage wet weather flows in the separated sanitary sewer system. Key findings resulted in a "convey and treat" approach to managing peak flows, along with an aggressive yet feasible I/I removal program in the two cities. The collection system modeling effort showed that critical improvements in the collection system would provide adequate capacity to convey the peak flows to the WPCF, where the flows could be further managed and treated. 1.4.3 Biosolids Management Plans The Biosolids Management Plan was adopted by the MWMC in 1997. Like the WWFMP, it involved a Eugene-Springfield steering committee and a citizen advisory committee. The Biosolids Management Plan included an evaluation of available options for long-term, cost- effective management of biosolids, and called for the construction of BFPs for mechanical dewatering at the BMF, a further study of alternatives for producing "Class A' biosolids, and the development of a dedicated biosolids land application site using poplar trees. The Class A Biosolids/Compost Evaluation was completed by Brown and Caldwell Engineers in January 1999; however, the MWMC determined that implementing the capital improvements to achieve a Class A product were not cost-effective at that time. In 1999 and 2000, the MWMC undertook a feasibility study and a reconnaissance study to determine whether to proceed with the purchase of land and development of a dedicated biosolids land application site. These preliminary studies indicated that the site meets the requirements for land application of biosolids as outlined in state and federal guidelines (OAR 340-50 and 40 CFR Part 503) and that it is a favorable site to be purchased for the dedicated land application site. The 2003 Management Plan for a Dedicated Biosolids Land Application Site was developed after the MWMC purchased the 596 acres on Awbrey Lane. This plan includes a conceptual plan and preliminary designs for the development, construction, and operation of a dedicated farm for biosolids land application. The plan outlines a facility that can provide an economically viable agricultural operation that accommodates a significant portion (20 to 50 per cent) of the current MWMC Class B liquid biosolids production. The plan also stresses that the remainder of the biosolids recycling will be through continued use of cooperating agricultural producers, and that new cooperating producers will likely be required to meet future demands. The MWMC approved the plan to provide a dedicated Biocycle Farm to give MWMC dramatically increased flexibility in solids handling options, and to provide for economically and environmentally advantageous recycling of a significant portion of the biosolids produced at the WPCF. 1.5 Industry There are 16 significant industrial users (SIUs) from Springfield and 22 from Eugene. Hynix Semiconductor in Eugene contributes over half of all significant industrial flow to the collection system. Historically, the total industrial flow contribution to the collection system has remained relatively constant at around 1.7 million gallons per day (mgd), or about three percent of the dry weather average flow. The Eugene and Springfield Industrial MWMG_1.0_REV13.DOC 1-5