Specifications include, but are not limited to: A Unified Sewer Plan (USP) consistent with the requirements for a General Sewer Plan (GSP) as prescribed by Chapter 36.94.010 RCW and Chapter 173-240-020 WAC and includes the elements included by Pierce County in previous USP iterations. •A strategic planning document addressing the Sewer Division’s management of Biosolids/Biogas/Biological Nutrient reduction over a 20-year planning horizon. This effort includes review of the existing facilities plans for the Chambers Creek Regional Wastewater Treatment Plant and the Cascadia Wastewater Treatment Plant at Tehaleh and amendment as needed. •Completion of the Environmental Review process, which may include completion of an Environmental Impact Statement (EIS) under SEPA, for both the Unified Sewer Plan and the Biosolids/Biogas/Biological Nutrient Reduction Strategic Plan.