Laboratory

Overview
GBMSD's laboratory analyzes wastewater and solid samples for our customers using state-of-the-art equipment and following approved methodology.  Data generated from GBMSD's laboratory is used to monitor the treatment plant's effectiveness, generate bills to our customers, ensure compliance with our Sewer Use Ordinance, and evaluate the environmental health of the Fox River and lower Green Bay.

Certification
The GBMSD laboratory is certified by the State of Wisconsin and follows all guidelines set forth in the Wisconsin Laboratory Certification & Registration Program (NR 149). The laboratory has the following scope of accreditation:

Class: General Chemistry

• Biochemical Oxygen Demand
• Carbonaceous Biochemical Oxygen Demand
• Ammonia as Nitrogen
• Nitrate+Nitrate as Nitrogen
• Nitrite as Nitrogen
• Nitrate
• Total Kjeldahl Nitrogen
• Orthophosphorus
• Total Phosphorus
• Total Solids
• Total Suspended Solids
• Chlorophyll a
• Hardness
• Chemical Oxygen Demand
• Chloride
• Cyanide, total and Ammenable

Class: Metals by ICP

• Silver, Aluminum, Arsenic, Barium, Beryllium, Calcium, Cadmium, Chromium, Copper, Iron, Potassium, Magnesium, Manganese, Molybdenum, Sodium, Nickel, Lead, Antimony, Selenium, Thallium, Zinc.
• Mercury by CVAA
• Low Level Mercury

Class: BNA Semivolatiles

• BNA Analyte Group by GC/MS

Class: Volatile Organics

• VOC Analyte Group by GC/MS

Organics, Organochlorine Compounds
PCB
Pesticides

Laboratory Certification