Section 120.954 - Notification of Incidents, Abandonment, and Lost Sources(A) Notification of incidents and sources lost in other than downhole logging operations shall be made in accordance with provisions of 105 CMR 120.281 and 120.282 and 120.142.(B) Whenever a sealed source or device containing radioactive material is lodged downhole, the licensee shall: (1) Monitor at the surface for the presence of radioactive contamination with a radiation survey instrument or logging tool during logging tool recovery operations; and,(2) Notify the Agency immediately by telephone and subsequently, within 30 days, by confirmatory letter if the licensee knows or has reason to believe that a sealed source has been ruptured. This letter shall identify the well or other location, describe the magnitude and extent of the escape of radioactive material, assess the consequences of the rupture, and explain efforts planned or being taken to mitigate these consequences.(C) When it becomes apparent that efforts to recover the radioactive source will not be successful, the licensee shall:(1) Advise the well-operator of an appropriate method of abandonment, which shall include: (a) The immobilization and sealing in place of the radioactive source with a cement plug;(b) The setting of a whipstock or other deflection device; and,(c) The mounting of a permanent identification plaque, at the surface of the well, containing the appropriate information required by 105 CMR 120.954(D);(2) Notify the Agency by telephone, giving the circumstances of the loss, and request approval of the proposed abandonment procedures; and(3) File a written report with the Agency within 30 days of the abandonment, setting forth the following information: (a) Date of occurrence and a brief description of attempts to recover the source;(b) A description of the radioactive source involved, including radionuclide, quantity, and chemical and physical form;(c) Surface location and identification of well;(d) Results of efforts to immobilize and set the source in place;(e) Depth of the radioactive source;(f) Depth of the top of the cement plug;(g) Depth of the well; and,(h) Information contained on the permanent identification plaque.(D) Whenever a sealed source containing radioactive material is abandoned downhole, the licensee shall provide a permanent plaque for posting the well or well-bore (an example of a suggested plaque is shown in 105 CMR 120.900: Appendix 120.770(B). This plaque shall:(1) Be constructed of long-lasting material, such as stainless steel or monel; and,(2) Contain the following information engraved on its face:(b) The radiation symbol without the conventional color requirement;(c) The date of abandonment;(d) The name of the well operator or well owner;(e) The well name and well identification number(s) or other designation;(f) The sealed source(s) by radionuclide and quantity of activity;(g) The source depth and the depth to the top of the plug; and,(h) An appropriate warning, depending on the specific circumstances of each abandonment. (Appropriate warnings may include: (A) "Do not drill below plug back depth"; (B) "Do not enlarge casing"; or (C) "Do not re-enter the hole", followed by the words, "before contacting the Massachusetts Radiation Control Program".)(E) The licensee shall immediately notify the Agency by telephone and subsequently by confirming letter if the licensee knows or has reason to believe that radioactive material has been lost in or to an underground potable aquifer. Such notice shall designate the well location, describe the magnitude and extent of loss of radioactive material, the consequences of such loss, and explain efforts planned or being taken to mitigate these consequences.