10.
11.
Evaluate scum disposal and handling options. The scum disposal
alternatives shall include:
e Continuing disposal at City landfill or other short-haul options
e Co-disposal with screenings and disposal at City landfill.
e Long-distance transportation in tanker to sludge incinerator or other
disposal option, and
e Transfer to existing anaerobic digester for digestion.
Based off the proposed scum disposal alternatives, evaluate scum handling
alternatives including scum well upgrades, thickening, additional
screening (if needed), and pumping. Budgeted effort includes 1 day of
field trips with OWNER staff to other WWTFs to assess scum handling
equipment. ENGINEER shall develop a M. ENGINEER shall
develop draft TM for OWNER input. SB.
Evaluate options to prevent floatabies fon accumulating 1 in the primary
influent channel. ENGINEER, shall develop draft TM for OWNER input.
Evaluate gravity thickener loadings with regard to typical loading rates,
access chemical addition alternatives and options to improve flow split.
ENGINEER shall develop’ draft TM for OWNER input.
ENGINEER shall conduct pipe thickness testing to confirm suitability of
piping. Assumé.2 days of field work by one staff person. OWNER shall
provide 1 staff person to assist ENGINEER with field work. ENGINEER
shall develop draft TM for OWNER input.
Evaluate. requirements to allow tanks to be drained through sludge
withdrawal lines with piping modifications in the Primary Gallery.
“ENGINEER shall develop draft TM for OWNER input.
Each of the ENGINEER’s building design disciplines shall inspect
existing facilities and prepare TM’s summarizing the anticipated
improvements as follows:
° ENGINEER’s structural division shall review inspection
information on primary basin concrete, and make
recommendations for rehabilitation / repair. A structural engineer
shall make | site visit to inspect one or more off-line tanks from
above. OWNER shall be responsible for cleaning tank, and
providing a staff person to enter tank to take photographs.
OWNER shall dewater, clean and photograph critical locations in
remaining primary clarifiers, and provide inspection information to
ENGINEER for review. ENGINEER shall develop draft TM for
OWNER input.
