EA
- Webpage
Laboratory certification & registration program
The Wisconsin Department of Natural Resources (DNR) Laboratory Certification Program was created in 1986 to help ensure that laboratories submit reliable and consistent data to the department's various environmental programs. The program currently…
- Webpage
Laboratory Certification Standards Review Council
The Laboratory Certification Standards Review Council is created under s. 15.107 (12), Wis. Stats. and generally meets quarterly each calendar year.Next meetingDate:Tuesday, April 22, 2025Time:9:00 a.m. to end of agendaLocation:In-person Option
- Webpage
PFAS certification
The Wisconsin Department of Natural Resources is offering certification for PFAS in drinking water (potable water), aqueous (non-potable water), and non-aqueous matrices.Labs that currently hold WI DNR PFAS certification can be found here: WI PFAS…
- Webpage
BOD Toxicity
Sample toxicity Often referred to as "sliding" BODs BOD decreases as sample volume increases (i.e., less dilute) Occurs frequently in systems receiving industrial waste Amounts to killing off (or severe shock to) "the bugs" Results in under-…
- Webpage
BOD seed
Seed preparation and addition De-ionized water kills - Adding a seed capsule to deionized water causes an osmotic imbalance that will kill seed organisms. The purified water —containing no salts— rushes across the bacterial cell walls. The bacteria…
- Webpage
Sampling and sample handling for BOD
Water and wastewater samples are biologically active, and the BOD will quickly deteriorate. Minimize the time between sampling and analysis to obtain the best BOD results. Take the following precautions when sampling and handling BOD samples.…
- Webpage
BOD resources
Websites Field Training Manual for Laboratory Analysts: Chapter 7 - BOD Biochemical Oxygen Demand Source: http://home.windstream.net/mikeric/Chap1to9/Chap7%20Biochemical%20Oxygen%20Demand.htm-->
- Webpage
BOD quality control
Limit of detection (LOD) BOD detection limits are theoretically based. A key assumption which the concept of detection for BOD is based is that the LEAST amount of depletion allowable is 2 mg/L. The LOD is also based on the highest volume of sample…
- Webpage
BOD sample pre-treatment
Because the BOD test is a bioassay, it is critical to maintain optimal conditions for the "bugs" (bacteria and other microorganisms) to remain viable. Temperature, pH, oxygen levels and the presence of disinfectants can all influence the outcome of…