9. Analyze dewatering performance including solids capture, polymer consumption,
and cake solids. Summarize annual average, peak monthly, and peak daily sludge
quantities.
10. For WWFTF flows, summarize available data on BOD and TSS removal rates and
effluent quality in terms of concentration and loading.
E. Conduct Plant Infrastructure Assessment
1. Develop a comprehensive plant infrastructure asset inventory:
a. Assess options for asset inventory database including Excel spreadsheets;
Revit model with Access database; existing CMMS systems in use by
City; proprietary asset management systems; or a hybrid approach.
b. Based on the results of the above sub-tasks, develop a comprehensive
plant infrastructure asset inventory. For budgeting purposes, the use of
Wright-Pierce’s Excel-based Asset Management System has been
assumed. The existing WERF list would be incorporated into the overall
asset inventory. It is assumed the asset inventory will include a
comprehensive inventory of equipment systems, buildings and structures;
electrical control systems; and piping systems as separate worksheets in an
Excel workbook.
c. The initial asset inventory shall be populated with information on the age
of the asset, materials of construction, and typical life to replacement.
2. Conduct condition assessments identifying specific upgrade needs. Condition
assessments will include:
a. Process equipment and piping
i. Process equipment and piping assessment by process engineer(s)
updating remaining life estimates from existing WERF list and
expanding to any smaller equipment system added to inventory.
b. HVAC and plumbing systems will be assessed by a mechanical engineer
specializing in these systems.
c. Buildings, structures and tanks will be evaluated by a combination of
architect and structural engineer.
12/10/19 5 Wright-Pierce
