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3. Iniection Interval. The proposed injection zone extends from the top of the <br />Cozzette Member of the Iles Formation at a depth of 3,864 feet BGS (Cozzette is <br />perforated from 3,911 to 3,927 feet BGS) to the base of the Corcoran Member of <br />the ]:les Formation. The Corcoran Sandstone is perforated from 4,077 to 4,241 feet <br />BGS. These two intervals are sepazated by a shale interval making up the base of <br />the Cozzette Member. The overall injection zone is confined by a tongue of the <br />Mancos Shale on top of the injection interval and the main part of the Mancos <br />underlying the interval. <br />4. erection Pressure Limitation. Based on the instantaneous shut-in pressure from a <br />fracture treatment of the well, a maximum surface injection pressure of 930 <br />pounds per square inch gauge (psig) has been established. If a higher pressure is <br />requested, it must be accompanied by a valid step-rate test (SRT) of the injection <br />zone, using fluid normally injected, to determine both the instantaneous shut-in <br />pressure (ISIP) and the formation breakdown pressure. The Director will determine <br />the allowable pressure modification based upon the test results and other parameters <br />reflecting actual injection operations. <br />The permittee shall give thirty (30) days advance notice to the Director if an <br />increase in injection pressure will be sought. Details of the proposed test shall be <br />submitted at least seven (7) days in advance of the proposed test date so that the <br />Director has adequate time to review and approve the test procedures. Results of all <br />tests shall be submitted to the Director within ten (10) days of the test. Any <br />changes in the maximum injection pressure established by this section, as dictated <br />by the test results, will be mule as a minor modification to the Permit. <br />5. erection Volume Limitation. There is no limitation on the number of barrels of <br />fluid per day (BFPD~ that mary be injected into the Getty # 1-7LW disposal well, or <br />in the cumulative number of barrels injected, provided that the maximum allowable <br />injection pressure limitation, Part II, Section C. 4., of this permit, is not exceeded. <br />6. Injection Fluid Limitation. 'T'his Class INon-Hazazdous Underground Injection <br />Control (iJIC) individual well Permit authorizes use of the Getty # 1-7LW for the <br />disposal of reject brine wastewater, including sodium cazbonate from the solution <br />mining fluid processed at the Parachute soda ash plant. No off-site (site meaning <br />the Parachute soda ash processing plant) waste, on-site solvents, or off- <br />specification chemicals will be accepted for disposal. Injection of any <br />hazardous waste as identified by EPA under 40 CFR 261.3 is prohibited. <br />7. Annular Fluid. Unless an alternative to a packer has been approved under 40 CFR § <br />146.12 (c), the annulus betwe;en the 2-3/8 inch tubing and the long string (4-1/2 <br />inch) casing shall be filled with fresh water treated with a corrosion inhibitor or <br />other packer fluid as approved, in writing, by the Director. The annulus shall be <br />maintained under a positive pressure ranging from 20 to 80 pounds per square inch <br />EPA Draft Permit No. CO 10932-04664 <br />Page 13 of 77 <br />