Brown and Caldwell Inc. 3/3/2021 Amendment 2

• Provide recommendations for technical information, appendices, etc. updates to meet current DOH guidelines. • Identify SOPs and/or O&M manuals that are not included in the current WFP Operations Manual that would be beneficial to include. • Facilitate development/collation of missing SOPs and/or O&M manuals for inclusion in the updated WFP O&M Manual. Everett Responsibilities • Provide electronic copies of existing and draft revised WFP O&M Manual. • Everett staff will develop/collate, with BC staff coordination, missing SOPs and/or O&M manuals identified for inclusion with the updated WFP Operations Manual. Task Assumptions • City to-provide existing WFP O&M Manual in PDF format, and draft updated O&M Manual in Microsoft Word format. • Task hours assume that WFP O&M manual does not exceed 300 pages. • This task will not include production of new sections of operational guidance but will be limited to review and comment on existing O&M guidance developed by the City. • Assume BC support effort will be limited to 140 hours,to be utilized as-directed by the City. Meetings • Assume 3 coordination and review conference calls, lasting 1 hour each and attended by 2 BC staff. Work Products • Brief technical memorandum summarizing BC's assessment and recommendations for the updated operations and maintenance manual. • Working copy of WFP O&M Manual file with comments and edits in track changes. o Final version of WFP O&M Manual to be submitted by June 30, 2021. Task 115 Filter Re-Rating Assessment(future work) Activities/Approach:The City is in the process of studying the possibility of seeking DOH approval for rerating the WFP filters from the current approved rate of 8 gpm/sf to a revised filter loading rate of 10 gpm/sf. BC has conducted recent efforts on the Facility Plan project related to potential hydraulic and/or process based bottlenecks resulting from higher flow rates through the plant.The City would like BC to conduct a holistic engineering analysis to determine the effect rerating may have on plant productivity.A rough outline of scope and timing of the requested effort follows. • Review pilot study summary documents, as they become available,to extract filter productivity data needed for plant production assessment. • Review WAC/DOH requirements for hydraulic/plant production information required to be submitted for filter plant rerating. • Analyze WFP hydraulics and unit processes to determine appropriateness of filter rerating and/or any plant limitations that need to be addressed prior to implementing rerating strategy. o Preliminary analysis will identify a universe of potential capital improvements (e.g_ new flocculated and filtered water flanged connections, modifications to existing filter Page 7 of 8