Monitoring. A discharge authorized by a discharge permit shall be subject to any monitoring requirements the Department deems necessary, including: The installation, use, and maintenance of monitoring equipment or methods; and When appropriate, biological monitoring methods. Each permit shall specify the sampling and analysis requirements, including the frequency and type of sampling and analysis. Each permittee shall submit the name and address of the laboratory performing analyses within 30 days of the issuance of the State discharge or NPDES permit. If the permittee changes laboratories during the operating permit, the Department shall be notified within 30 days in writing. Record Keeping. The permittee shall retain for a minimum of 3 years any records of monitoring activities and results including all: Raw data and original strip chart recordings; Calibration and maintenance records; and Reports. This period of retention shall be extended during the course of unresolved litigation regarding the discharge of pollutants, or when requested by the Department. All records of monitoring shall include for all samples: The date, exact place, time, and method of sampling; The dates of analyses; Who performed the analyses; The analytical techniques and methods used; and The results of the analyses. Reporting. The permittee shall submit the monitoring results to the Department on the proper discharge monitoring report form. The report shall be submitted in the time frame required by each permit. The reporting period may not be less than once per year. Measurements below the minimum level may be reported as BML (below minimum level).