EPA Approval Letters

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EPA Approval Letters and Complete Methods

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

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