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Conservation Commission (COGCC). When the Pemut is issued to,convert the Getty well to <br />Class I status, the Getty No. 1-7LW will be an integral part of the company's soda ash facility, and <br />will be used to dispose of reject brine fluids from the processing of sodium carbonate fluids. The <br />sodium cazbonate fluids aze being produced as a result of the in-situ mining of Nahcolite <br />(NaHC03) in the Piceance Creek Basin at the Yankee Gulch Sodium Lease. This fluid is <br />transported to the Pazachute processing facility by buried pipeline where sodium cazbonate is <br />extracted and processed into soda ash and sodium bicarbonate. Much of the remaining barren <br />fluid is transported back to the mine site for reinjection into the solution mine cavities, but a <br />portion of the fluid containing impurities is removed during the processing. This waste brine fluid <br />is presently placed in lined and netted surface impoundments. American Soda proposes to utilize <br />this injection well for the disposal of much of the reject brine presently going to the impoundments <br />located at the facility. <br />This Permit is for the conversion of an existing Class II (oil and gas related wastes) salt <br />water injection well to aClass INon-Hazardous well for the disposal of partially saturated to <br />saturated brine fluids into the Cozzette and Corcoran Sandstones. The waste brine will be <br />transported by truck from the soda ash facility to the well site and will be stored in on-site tanks <br />prior to injection. Only reject brine containing mainly sodium carbonate from the soda asb <br />facility will be accepted for disposal. No on-site off specification chemicals or solvents <br />generated at the soda ash plant or waste from any offsite facility will be accepted for <br />disposal. The average injection pressure is anticipated to be 800 pounds per square inch gauge <br />(psig) with average injection temperatures between 40°F and 80°F. The maximum injection <br />pressure will be limited to 930 psig. <br />The top of the injection zone, the Cozzete Member of the Iles Formation, is located at a <br />depth of about 3,864 feet below ground surface (BGS). The lower portion of the injection zone is <br />the Corcoran Member of the Iles Formation whose top is 4,076 BGS. The perforated portion of <br />the Cozzette Sand interval is from 3,911 to 3,927 feet BGS and the perforated interval of the <br />Corcoran Sand interval is from 4,077 to 4,241 feet BGS. The Mancos Shale underlies the <br />Corcoran at approximately 4,280 feet BGS. The injection zone is isolated from the overlying <br />porous intervals (Rollins Sandstone Member of the Iles Formation) by a tongue of the Mancos <br />Shale that is approximately 54 feet thick. <br />The facility covered by the application is in the south-west portion of the Roan Creek <br />Drainage that is a part of the Piceance Creek Basin. The legal location is: <br />Proposed Class I Disposal Well Getty No. 1-7LW <br />NE 1/4 of the NE 1/4 <br />1282 feet from north line and 356 feet from the east line <br />Section 7, Township 8 South -Range 97 West, 6`" PM. <br />Garfield County, Colorado <br />Statement of Basis for EPA Permit No. CO 10932-04664 Page 2 of 18 <br />