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Attachment J <br /> Stimulation Program <br /> Application Requirements <br /> Outline any proposed stimulation program. <br /> Approach <br /> This section addresses well stimulations that could be conducted at the existing or future <br /> wells. <br /> Anticipated Initial Conditions at the LEC-1 Well <br /> Considering the results of the initial testing and more than a decade of successful operation <br /> of the STIG-1 well,no injection zone stimulation program is likely to be necessary for the <br /> LEC-1 well. The Domengine Formation sands at the injection site are moderately permeable, <br /> and so long as the injected fluids are filtered and generally free of particulates,clogging <br /> should be minimized. <br /> Geochemical analysis (see Attachment H) indicates that wastewater being injected at STIG-1 <br /> and that proposed to be injected at LEC-1 well should be chemically compatible with the <br /> injection zone matrix. Therefore,no stimulation should be needed at LEC-1 and the backup <br /> well,if drilled, other than general well cleaning and development to remove any residual <br /> drill mud from the borehole immediately following construction of the well. <br /> Well development at LEC-1 and the backup well will commence immediately following <br /> casing perforation, and the installation of the screen and sand pack in the injection zone. The <br /> well will be pumped until the drilling mud has been removed from the well, and water is <br /> free of any visible particulate matter. Surging and/or jetting the screened section of the well <br /> may be necessary to remove particulate matter and drill mud from the sand pack. <br /> Conditions That Could Result in Stimulation in the Future <br /> As injection begins and continues at STIG-1, LEC-1, or the backup well,well stimulation <br /> may be required to increase injectivity to initial values. Continuous monitoring and <br /> recording of injection rates and pressures will allow for ongoing determination of injectivity <br /> under normal operating conditions. A reduction in injectivity will indicate plugging of <br /> either the injection matrix or the sand pack in the well. Should that occur,the well will be <br /> tested to assess whether the well has partially filled in due to particulates in the injection <br /> stream or back flowing from the injection zone during periods of down time,or to assess <br /> whether the screen and/or sand pack has clogged or collapsed. Should clogging be <br /> documented, samples of the particulates will be collected and tested for chemical <br /> SAC1371322/082550026(ATTACH MENT-J.DOC) J-1 <br />