Jerald O. Thaler, P.E. Fishbeck, Thompson, Carr & Huber,
Inc. Elaine J. Venema, PE. Fleis & VandenBrink Engineering,
Inc. Slide 2 Potential Industrial Discharge Effects
www.michigan.gov/deq Slide 3 General Prohibition Federal
Pretreatment Regulations 40 CFR 403 and Michigan Part
23--Pretreatment Rules require that: Any nondomestic user
introducing pollutants into a POTW may not cause pass-through or
interference www.michigan.gov/dgallery Slide 4 Pass-through
Discharge from a POTW that violates any NPDES permit requirement,
including: Increase in magnitude of the violation Increase in
duration of the violation Interference A users discharge that,
alone or in combination with other user discharge(s), causes both
of the following: Disruption of the POTWs operation, wastewater
treatment, and/or sludge processing Pass-through or restriction of
sludge disposal Slide 5 Compatible Pollutants of Concern (POC)
Pollutants which a POTW is typically designed to treat, and
typically subject to extra-strength surcharges: 5-day Biochemical
Oxygen Demand (BOD 5 ) Total Suspended Solids (TSS) Total
Phosphorus (Total-P) Ammonia Nitrogen (Ammonia-N) Slide 6 What
about Fats, Oil & Grease? While generally considered a
compatible POC, represents a special case: Collection system
cholesterol One of the major causes of sewer blockage Requires
control at the source Often excluded from extra-strength surcharge
program C. Bellmore/City of Mount Clemens, MI Slide 7 Common
Nondomestic Dischargers of Compatible POC Hospital Commercial
Laundry Hauled Wastes (e.g., septage) Food Processing Dairy
Brewery/Winery Rendering Landfill Leachate Slide 8 Agenda Control
Options 1 Treatment at the Source 2 Treatment at POTW with
Insufficient Capacity 3 Treatment at POTW with Excess Capacity
Questions and Discussion
