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City of Everett Water Treatment Plant Facility Plan Amendment 2 I Scope of Work <br />• Finished Water Pump Station Evaluation TM, draft and final. <br />Task 111d. Additional Facility Plan Technical Support (combination of completed and future workl <br />Activities/Approach: At the City's request, the following technical support is provided in addition to <br />the core facility plan tasks. <br />• Additional Solids Dewatering Recommendations (completed) <br />o Developed recommendations for improved geo bag performance and backwash <br />water pond operation for optimization of solids thickening. Recommendations were <br />provided as Attachment A in solids dewatering technical memo. <br />• Sample Water Pump Analysis (completed - future support included in Task 112) <br />o Attend calls with City staff to discuss sample water pump operational issues. <br />o Review sample water pump record drawings, photos, and field collected operational <br />data related to sample pump operation and performance. Review to focus on sample <br />water pumps 11, 12/18, 16, and 17 located in the backwash water pump room. <br />o Based on record drawings and operational data, develop a decision tree for in-house <br />sample pump troubleshooting and evaluation. Recommendations to focus on <br />addressing the noisy sample pump operation and high vibration. <br />o Provide additional technical support as requested by City staff. <br />• Hydraulic Profile Assessment Datum Correction (completed) <br />o Update Visual Hydraulics model based on the correction from the local plant datum <br />to NAVD88. <br />o Using the updated model, re -run the hydraulic analysis and update the technical <br />memo results, recommendations, and hydraulic profile figures. <br />• Revise Task 104 Regulatory and Water Quality Figures (completed) <br />o Complete City -directed revisions to appendix figures for the Task 104 Regulatory and <br />Water Quality Assessment TM. <br />Task 112 -As-Requested Technical Services (future work) <br />Objective: Provide on -call technical support related to water filtration plant 0&M and capital <br />improvement planning needs. <br />Activities/Approach: To be determined, based on City requests. No work will be completed under this <br />task without written direction from the City. <br />A budget allowance of $50,000 is included for this task. <br />Everett Responsibilities <br />• Provide direction and authorization for requested additional work. <br />Work Products <br />• To be determined. <br />Task 113 Hypochlorite Dosing System Evaluation and Alternatives (future work) <br />Activities/Approach: Evaluate hypochlorite dosing system and develop alternatives for replacement <br />of the existing venturi eductors with new eductors or chemical metering pumps. <br />Page 5 of 8 <br />