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(d) Inlet and discharge temperatures and pressures shall be monitored continuously and recorded on ten (10) minute intervals in the injection fluid and production fluid flow lines at locations close to the flow meters and density meters. These data measurements shall be used both for process control and for correlation with the fluid density measurements. (e) Subsequent to initial MIT: additional MITs shall be conducted as necessary and in no case less frequently than once every five (5) years as required in 40 CFR § 196.33 (b) for Class III wells during the life of the solution mining wells. If the fluid and pressure data suggest that there may be possible fluid movement, either out of the solution mining cavity or behind the outermost casing, the well must be shut-in and EPA notified immediately following the procedures set forth in Part III (E)(10)(C) of this Permit. At a minimum, an MIT shall be conducted within 48 hours. This may include the requirement to run a temperature survey or other designated test. Results of anv MIT(s) shall be submitted in the first quarterly monitoring report after the MIT has been conducted and shall include the following information: • date, time, and interval of each MIT measurement; • individual(s) who performed the MIT measurements; • dates of calibration of the MIT equipment; • techniques and equipment used to collect MIT measurements; and results of the temperature log, noise log, tracer survey or other equivalent MIT log designed to monitor fluid movement behind pipe. (f) Cavity development shall be monitored to estimate cavity size. Because the leached solution cavity will be a matrix of oil shale rather than a void, size and shape must be determined by indirect methods and standard logging methods used in mining operations will not be accurate. Material balances of the volumetric fluid flow rates into EPA FINAL Area Permit No. C03858-00000 Page 23 of 164