Date: 2025 06-June 17

CDM Smith

WesTech / Trickling Filters

WesTech remote adjustments on trickling filters.

Pump #10 was not turned on. Flow is still being adjusted for the trickling filters #2 and #3. #3 was turned on this morning. #2 has been in service over the weekend.

"Joe" is coming for sampling on Thursday. The Valve on TF 1 is stuck at 60% open, because there isn't enough flow to adjust the speed.

There will be a restart of TF#1 for testing, to start on Thursday.

Tristate did troubleshooting yesterday on speed sensor wiring - a twisted pair has been installed backwards.

Time to start double checking the landings in the DCU.

BioAir

Sidenote: BioAir - call with Rob Firestone today at 11 AM to install updated startup firmware on BioAir 2

BioAir #3 should be in service later this month. Communication problems.

GMP5 schedule:

Trickling filters operating in accordance with contract. Construction work by Max Foote and WesTech should be complete by end of July to mid August.

Mike's update

• Crane coming Friday or Monday to put a screw pump in
• Xylem has been slow and hard to work with
• The plant has been running great, TSS and BOD is good.
• Primary effluent BOD is low compared to a year and a half ago.

Water reuse update

Gresham
Pipe routing discussion
Tie in at the lagoons yet unclear
Heavy equipment is now present to clear land soon
The duck bank was pushed back because the excavation was failing.

Submittals and RFI's

Melissa Cox (CDM Smith)
FDT has been submitted for review to engineering.

Financials

Terms:

• Owner initiated
• DN / CMAR
• 3rd party initiated

Solar project and local tie-in

Darrell:

• Gas main for xAI, negotiations between City of Memphis and MLGW
• Redesign for xAI sludge line and TVA reuse lines

Questions:

• Mike Brower: How do we know that the dispersion fans are doing their job.
  • Dampers are set to inform the proper inflow rate.
  • Dispersed to the designed stack height
  • A model was made to determine airflow
  • They run at a constant rate based on how the dampers were set.
• Easement for lines to xAI
  • oxygen and nitrogen lines
  • power transmission
  • more!