Section 120.927 - Energy Compensated SourcesThe licensee may use an energy compensated source (ECS) which is contained within a logging tool, or other tool components, only if the ECS contains quantities of radioactive material not exceeding 3.7 megabecquerel. (100µCi).
(A) For well-logging applications with a surface casing for protecting fresh water aquifers, use of the ECS is only subject to the requirements of 105 CMR 120.915, 120.916 and 120.917.(B) For well-logging applications without a surface casing for protecting fresh water aquifers, use of the ECS is only subject to the requirements of 105 CMR 120.904, 120.915, 120.916, 120.917, 120.926 and 120.954.