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Attachment 0 <br /> Plans for Well Failures or Shut-ins <br /> Application Requirements <br /> Outline contingency plans (proposed plans,if any,for Class II) to cope with all shut-ins or <br /> wells failures, so as to prevent migration of fluids into any USDW. <br /> Approach <br /> This section presents how interruptions in injection well operation will be addressed overall <br /> at the STIG-LEC facility. <br /> Contingency Plan for Well Failures or Shut-ins <br /> Both the STIG and LEC facilities will operate with dedicated injection wells to support <br /> waste operation. However,interruptions in well operation can be expected to occur for <br /> either short-term or longer periods of time. <br /> Short-term Interruptions <br /> Short-term interruptions could include power outages,minor equipment failure,well- <br /> testing, or other conditions that would take a well out of operation for a period of up to a <br /> few days. In these situations,existing holding tank capacity and/or injection well capacity <br /> will be utilized. <br /> LEC cooling tower blowdown and injection well piping will be configured to supplement <br /> the ability to discharge to the existing STIG plant wastewater storage tank or directly to the <br /> STIG-1 injection well. Conversely,the STIG Waste Water Discharge Storage Tank and <br /> injection pump discharge piping will be modified to supplement the ability to discharge <br /> STIG plant wastewater to LEC's injection well. <br /> Supplemental injection well capacity is available to offset a short-term operational or <br /> mechanical interruption. LEC-1 and STIG-1 would each'back up' the other well. The <br /> injection rates proposed in this UIC application are above the anticipated need for routine <br /> operation of the power plants. It is anticipated that if a short-term interruption occurs,the <br /> combination of holding tank capacity and supplemental injection well capacity will enable <br /> the plants to operate uninterrupted. <br /> Well maintenance,if needed,and testing is planned to be conducted during winter months <br /> when power demands are lower, or when the power plants are undergoing maintenance <br /> procedures. <br /> SAC/371322/082560025(ATTACHMENT-O.DOC) 0-1 <br />