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drinking water for human consumption; or contains fewer than 10,000 <br /> milligrams per liter TDS; and which is not an exempted aquifer (40 CFR <br /> §§144.3, 146.4). <br /> (i) The Permittee shall provide well logs and representative ground water <br /> sample analyses from the targeted injection aquifer using method(s) <br /> approved by EPA as evidence. These anlayses shall be sufficient to <br /> confirm compatibility of the injectate with the injection formation. <br /> (ii) EPA may require minor alterations to the construction requirements <br /> based upon the information obtained during well drilling and related <br /> operations if the proposed casing setting depths will not completely <br /> cover the base of the USDWs and the confining formation located <br /> immediately above the injection zone. <br /> (b) Step-Rate Test ("SRT") <br /> An SRT will be conducted on Well CSC-1 before injection is authorized, to <br /> establish maximum injection pressure. Refer to Society of Petroleum <br /> Engineering ("SPE") paper #16798 for test design and analysis. See <br /> Appendix G. Similar testing may be required in Well CSC-2, at the discretion <br /> of EPA. The SRT will be used to establish the injection pressure limitation, <br /> in accordance with Section C, paragraph 3 of this part. <br /> (i) Prior to testing, shut in the well long enough so that the bottom-hole <br /> pressure approximates shut-in formation pressure. <br /> (ii) Measure pressures with a down-hole pressure bomb and coordinate <br /> with a surface pressure recorder. <br /> (iii) Use equal-length time step intervals throughout the test; these should <br /> be sufficiently long to overcome well bore storage and to achieve <br /> radial flow. Typically, use at least thirty (30) minute intervals. <br /> (iv) Record at least three (3) time steps (data points on pressure vs. flow <br /> plot) before reaching the anticipated maximum pressure. <br /> (v) At the end of the test, shut down pumps and record the instantaneous <br /> shut in pressure. <br /> (c) Fall Off Pressure Test("FOT") <br /> To determine and to monitor formation characteristics, an FOT shall be run <br /> in the well after a radial flow regime has been established. The FOT will be <br /> UIC Permit CA10500002 <br /> Page 7 of 29 <br />