OAR 632-020-0159. Monitoring Injection

(1) The department requires monitoring of injection operations to ensure that there is no escape of geothermal fluids from the casings or through the annular space between casings and open hole except in the zone for which injection is permitted. (2) Monitoring required by the department may include gauging pressure between casings, periodic testing for casing leaks, surveys to detect movement of fluid in adjacent rock formations, cement bond logs, temperature measurements, analyses of water chemistry, special wellhead equipment or other methods employed by industry to monitor re-injection operations.