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(d) Loss of Mechanical Inteority. If the well fails <br />to demonstrate mechanical integrity during a <br />test, or a loss of mechanical integrity as <br />defined by 40 CFR Part 196.8 becomes evident <br />during operation, the operator shall notify the <br />Director in accordance with Part III Section <br />E.10.(c) of this permit. Furthermore, injection <br />activities shall be terminated immediately; and <br />operations shall not be resumed until the <br />operator has taken necessary actions to restore <br />integrity to the well and the Director gives <br />written approval to recommence injection. <br />3. Infection Zone. The approved injection zone is within <br />the nahcolite resource intervals of the Saline zone in <br />the lower portion of the Parachute Creek Member of the <br />Green River Formation. The injection zone shall be <br />from at least 200 feet to approximately 900 feet below <br />the Dissolution Surface. <br />4. Infection Pressure Limitation. A maximum injection <br />pressure, measured at the surface, of 800 psig is <br />approved for these wells until such time as the <br />operator demonstrates otherwise. In no case shall <br />injection pressure initiate fractures in the confining <br />zone or cause the migration of injection or formation <br />fluids into a USDW. The Director may increase or <br />decrease the injection pressure, based on testing <br />results, such as a step-rate test (guidance in <br />Appendix G) that uses fluid normally injected to <br />determine both the instantaneous shut-in pressure <br />(ISIP) and formation breakdown pressure. <br />5. Infection Volume Limitation. There is no limitation <br />on the rate (gallons or cubic feet of fluid per day) <br />or volume that may be injected into the solution <br />mining well(s). The volumetric flow into and out of <br />each well is currently anticipated to be 100 to 400 <br />gallons per minute (gpm). <br />6. Infection Fluid Limitation. The injection fluid shall <br />be limited to any combination of the following fluids <br />having a total volume equal to the quantity needed to <br />produce brine at the rates required by production. <br />(a) Partially saturated to saturated solution mining <br />production fluid. This fluid is recycled to the <br />wells as part of the solution mining process. <br />Page 13 of 120 <br />EPA FINAL Area Permit No. CO3870-00000 <br />