EPA Recommends Approval of In-Situ^® RDO^® Optical DO Methods

The U.S. EPA has granted nationwide approval to three In-Situ optical DO methods under the Alternate Test Procedure (ATP) process.

EPA Letters

• In-Situ Method 1003-8-2009: Biochemical Oxygen Demand (BOD) Measurement by Optical Probe
• In-Situ Method 1004-8-2009: Carbonaceous Biochemical Oxygen Demand (CBOD) by Optical Probe
• In-Situ Method 1002-8-2009: Dissolved Oxygen (DO) Measurement by Optical Probe
  
  

Methods

• Alternate Test Procedure N09-0020: In-Situ Method 1003-8-2009 Biochemical Oxygen Demand (BOD) Measurement by Optical Probe
• Alternate Test Procedure N09-0021: In-Situ Method 1004-8-2009 Carbonaceous Biochemical Oxygen Demand (CBOD) by Optical Probe
• Alternate Test Procedure N05-0014: In-Situ Method 1002-8-2009 Dissolved Oxygen (DO) Measurement by Optical Probe
  
  

Additional Information

• EPA regional map and contacts
• Methods validated for ATP approval
• RDO technology backgrounder
• Frequently asked questions
• Press release — November 20, 2009