What are the fluid analysis requirements for Class 2 injection wells?
The operator of a Class 2 injection well is required to monitor the nature of the injected fluid with sufficient frequency to yield data representative of fluid characteristics. For rule authorized injection wells, an initial fluid analysis may have been submitted and may be on file with EPA. If so, a new analysis is required only when changes are made to the injected fluid or when requested, in writing, from EPA. For permitted injection wells, a fluid analysis is required annually, and whenever changes are made to the injected fluid. At a minimum, a fluid analysis should include pH, specific gravity, and total dissolved solids (TDS). Some permits require analysis of other constituents, as well. Please check your permit to be sure.
