The Thermo Scientific Orion RDO probe can be used for DO and BOD NPDES compliance monitoring measurements with approval letters from your region and state. ASTM D888-05 Dissolved Oxygen Test Method C for luminescence-based sensors, like the Thermo Scientific Orion RDO probe, was granted interim Federal EPA approval in January 2006. This means that EPA Regions and states have the option to grant approval letters to laboratories who want to use optical DO sensors for DO and BOD WW testing before the method is promulgated as law. That is expected to happen when the next EPA Method Update Rule is finalized, possibly 2012. In many states (and Regions), acquiring an approval letter is a simple process. See below for regulatory information pertaining to your region and state.
Region 1- Connecticut , Maine , Massachusetts , New Hampshire , Rhode Island , and Vermont .
Region 2- New Jersey , New York , Puerto Rico and the U.S. Virgin Islands.
Region 3- Delaware , Maryland , Pennsylvania , Virginia , West Virginia , and the District of Columbia .
Region 4- Alabama , Florida , Georgia , Kentucky , Mississippi , North Carolina , South Carolina , and Tennessee .
Region 5- Illinois , Indiana , Michigan , Minnesota , Ohio , and Wisconsin .
Region 6- Arkansas , Louisiana , New Mexico , Oklahoma , and Texas .
Region 7- Iowa , Kansas , Missouri , and Nebraska .
Region 8- Colorado , Montana , North Dakota , South Dakota , Utah , and Wyoming .
Region 9- Arizona , California , Hawaii , Nevada , and the territories of Guam and American Samoa .
Region 10- Alaska , Idaho , Oregon , and Washington .
In January 2006, the Federal EPA recommended that each EPA Region grant interim approval of ASTM International Standard Test Method D888-05 (including Test Method C Luminescence-Based Sensor Procedure) for compliance monitoring of dissolved oxygen (DO) and biochemical oxygen demand (BOD) in wastewater under 40 CFR Part 136.3. The interim approval applies until the method is promulgated in a final rule published in the Federal Register. When a method has been given interim approval status, the EPA Regions and the individual states may grant approval to use the method in their region.
Approval letters must be obtained from both the region and state in which the laboratory is located. These letters are generally easy to obtain and usually require sending regional and state contacts no more than the laboratory permit number, an updated standard operating procedure (SOP) and comparison data to the current method. Each region and state has slightly different requirements for granting of approval letters.
Where do I find the specific requirements for my laboratory?
Detailed information can be found by clicking your region above and scrolling down to your state.
Questions? Contact Technical service at 1-800-225-1480.
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