WA ST Dept of Ecology 2/15/2022 - Laserfiche WebLink

i. Description of current treatment processes, including any modifications made for optimization or due to corrective actions. ii. Description of site limitations, constraints, or other treatment implementation challenges that exist. iii. Identification and screening of potential treatment technologies for meeting two different levels of treatment: 1. AKART for nitrogen removal (annual basis), and 2. 3 mg/L TIN (or equivalent load), as a seasonal average (April through October) c. Economic Evaluation i. Develop capital, operation and maintenance costs and 20 year net present value using the real discount rate in the most current Appendix C to Office of Management and Budget Circular No. A-948 for each technology alternative evaluated. ii. Provide cost per pound of nitrogen removed. iii. Provide details on basis for current wastewater utility rate structure, including: 1. How utilities allocate and recover costs from customers. 2. How frequently rate structures are reviewed. 3. The last time rates were adjusted and the reason for that adjustment. iv. Provide impact to current rate structure for each alternative assessed. d. Environmental Justice (EJ) Review i. Evaluate the demographics within the sewer service area to identify communities of color, Tribes, indigenous communities, and low income populations. ii. Identify areas within service area that exceed the median household income. iii. Include an affordability assessment to identify how much overburdened communities identified in S5.E.5.d.i can afford to pay for the wastewater utility. iv. Propose alternative rate structures or measures that can be taken to prevent adverse effects of rate increases on populations with economic hardship identified in S5.E.5.d.i. 8 https://www.whitehouse.gov/wp-content/uploads/2020/12/2020_Appendix-C.pdf I Puget Sound Nutrient General Permit Page 25