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30 TAC 331.163 • hup:~w.lnrccstale.tz.us/RuleSAac/30A/331/1/331. 163.himl <br />(A) After installation and cementing of casings, and prior to drilling out the cemented casing shoe, surface <br />casing shall be pressure tested to 1,000 psi for 30 minutes, and the intermediate and long string casing <br />shall be tested to 1,500 psi for 30 minutes, unless otherwise specified by [he executive director. <br />(B) After drilling out the cemented long string casing shoe, and prior to drilling more than l00 feet of core <br />hole or pilot hole below [he long string casing shoe, the bond between the salt, cement, and casing shall be <br />tested at a pressure of 0.8 psi per foot of depth. <br />(C) The pilot hole and/or core hole shall be tested between the long string casing shoe and the total <br />investigated depth, at a casing seat pressure of 0.8 psi per foot of depth. <br />(3) Coring. <br />(A) Full-hole cores shall be taken beginning at the top of the caprock, or if caprock is not encountered, <br />from the top of the salt stock, to a total investigated depth of 1,000 feet below the intended cavern floor. <br />Cores shall be analyzed at sufficient frequency [o provide representative data for the caprock, confining <br />zone and the injection zone, including permeability, porosity, bulk density, compressive strength <br />(uniaxial), shear strength (triaxial), water content, and compatibility with permitted waste tnaterial. <br />(B) In situ permeability, lithostatic gradients, and fracture pressure gradients shall be determined in [he <br />core hole for the salt, within the cavern injection interval. <br />(C) Prior to commencement of injection for cavern construction, the pilot hole or core hole shall be filled <br />with salt-saturated cement from total investigated depth back to the designed depth of the salt cavern floor. <br />(D) Upon satisfactory completion of all coring requirements of this subsection and all reports and <br />certification requirements of subsection ~ of this section, for at least one salt cavern disposal well in a <br />multi-cavern waste disposal project, the executive director may modify or waive provisions in <br />subpazagraphs (A), (B), and (C) of this paragraph. <br />(4) Well integrity testing. The mechanical integrity of a well must be demonstrated prior to initiation of <br />injection activities. A mechanical integrity test shall consist of: <br />(A) a pressure test with liquid or gas; <br />(B) a temperature, noise log, or oxygen activation log; <br />(C) a casing inspection log, if required by the executive director; and <br />(D) any other test required by the executive director. <br />(f) Compatibility. All well materials must be compatible with formations and fluids with which the <br />materials may be expected to come into contact. A well shall be deemed to have compatibility as long as <br />the taterials used in the construction of the well meet or exceed standards developed for such materials by <br />the American Petroleum Institute (API), the American Society for Testing Materials (ASTM), or <br />compazable standards acceptable to the executive director. <br />(g) Surface facilities. <br />(1) The injection pump system shall be designed to assure that the surface injection pressure limitations <br />a or 5 1/ 18/99 12:58 PM <br />