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Fecal Coliforms by Colilert-18 for NPDES

To use the IDEXX Colilert-18 for Fecal Coliforms:

The U.S. EPA Region 10 will accept Alternate Testing Procedure (ATP) applications from individual laboratory facilities and will authorize its use on a case by case basis. Laboratories should obtain their ATP approval and submit a copy of the approval letter when they first submit Fecal Coliform results using Colilert-18.

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