Speaker: Don Hudgins:

People:
Gary Cohen, Derek McElroy, Joseph Scchmittou, Theresa Stein, Tammy Westbrook, Derek Willis, Nayalia Switala, Chris Luss, Clayton Bennett, Mike Brower, Henry Nakayama, Don Hudgins

gcohen@cohenenvironmental.com,
joseph.schmittou@memphistn.gov,
nswitala@materialmatters.com,
derek.mcelroy@memphistn.gov,
derek.willis@memphistn.gov

Files: C:\Users\george.bennett\OneDrive - City of Memphis\Documents\Projects\0000-Maxson\Metals\Monthly Metals Round Up - 12 Feb 2025.zip

Relevant: Pretreatment Program

External Influent Metals

Metals sampled: Zinc, Copper, Nickel, Chromium, Molybdenum
Sampling by City and by Tioga Environmental

Look at particular parts of town
Phase 2: Loosahatchie Interceptor

• Explains Chromium
• Runyon cleans out train tanker cars, from vegetable oil.
  • Runyon is the largest contributor of zinc, for what is found in the Loosahatchie Interceptor
• Corovo Mining is a permit holder for industrial waste trade pond
  • Primary user of pond is Mitsubishi Chemical, who makes chemicals for batteries
  • Corovo makes acrylics and cyanide
  • Corovo's contribution explains 100% of copper in Loosahatchie interceptor, and large portions of the chromium and nickel

Phase 3: Look at Wolf River Interceptor

• PMC Biogenics is a big contributor of Zinc

Phase 4:

• Compare Wolf River Interceptor with PennaChem
• Hypothesis: PennaChem is under-reporting nickel #bignews
• Future: Look into Bartlett Industries as a source of metals (Sharp, Olympus, Gyrus, Brim)

Summary:

• Side streams contribute ~17% of all four metals ; this is due to our capture rate of 80-85%
• Known industrial sources: Copper and zinc are largely unexplained

Look at these industries

• Van Gold
• KYG
• AY
• Memphis Cellulose
• PMC Biogenics
• PennaChem
• other

Internal Plant Metals

Sampling at Stiles

![[Stiles Internal Metals Investigation_2.5.2025.pdf]]

A lot of metals are trapped in the lagoon.
Goal: cover more grit, get that to landfill

These metals get recirculated throughout the plant daily - 3 pounds of Chromium, 15 pounds of Copper, 5 pounds of Nickel, 67 pounds of zinc

Maxson Plant

Key industries:

• Richardson Oil
• Kelloggs
• Blues City Brewing
• Solae

Mysterious levels of Molybdenum in biosolids.

We need a higher frequency of zinc reporting from Solae - at least monthly

Investigate these sources:

• Valicore
• Valero

Key take away:

• Improved grit removal
• Higher frequency reporting from key industries

Ammonia - Gary Cohen

Maxson grit removal project - will there be money for it.
Alternative: Telling industries to cut back, and in terms of providing more than just data.
There is no chance of getting a grant right now, in terms of federal funds to do the work.

How do we make things more palatable for industry?

• Idea: An increased sampling requirement, with a sunset clause that it only applies for a year.