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Injection fluids in wells LEC-1 and LEC-2 will consist of tertiary-treated makeup <br /> water from WPCF, other recovered process wastewater that has been concentrated <br /> by evaporative losses in the cooling tower, as well as the chemicals added to the <br /> circulating water that are used to control scaling and biofouling of the cooling tower <br /> and to control corrosion of the circulating water piping and intercooler. <br /> All fluids from WPCF that are injected using STIG-1, LEC-1 and LEC-2 will be <br /> used in the power generation processes/sytems identified in this section prior to <br /> injection. <br /> in addition, <br /> (a) The Permittee shall not inject any hazardous waste, as defined by 40 CFR <br /> Part 261,at any time. See also paragraph 1(b)of this section. <br /> (b) Injection fluids shall be limited to only waste fluids authorized by this permit <br /> and produced at the Northern California Power Agency and White Slough <br /> Water Pollution Control facilities. No fluids .shall be accepted from other <br /> sources. <br /> (c) Any well stimulation or treatment procedure performed at the discretion of <br /> the operator shall be proposed and submitted to EPA for approval prior to <br /> implementation. <br /> 5. Tubing/Casing Annulus Requirements <br /> (a) Corrosion-inhibiting annular fluid shall be used and maintained during well <br /> operation. A complete description and characterization shall be submitted to <br /> EPA for approval before use. <br /> (b) A minimum pressure of one hundred (100) psi at shut-in conditions shall be <br /> maintained on the tubing/casing annulus. Within the first quarter of injection <br /> operations, the Permittee shall determine the range of fluctuation of annular <br /> pressure for the well during periods of normal operation. This normal <br /> pressure range shall be submitted with the first quarterly report after injection <br /> has commenced. Any annular pressure outside of the normal range shall be <br /> considered a loss of mechanical integrity and shall be reported per Paragraph <br /> 2(c) of this section. <br /> E. MONITORING,RECORDKEEPING,AND REPORTING OF RESULTS <br /> 1. Injection Well Monitoring Program <br /> Injection fluids from different sources and/or of different composition will be <br /> analyzed to yield representative data on their physical, chemical, or other relevant <br /> FINAL UIC Permit CAI 0910003 <br /> Page 17 of 29 <br />