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INTRODUCTION The process water supply for both power plants is treated wastewater from the White Slough WPCF. NCPA has a will-serve letter from the City of Lodi to receive the treated wastewater for the LEC plant. In the case of the STIG plant,NCPA receives treated wastewater as part of its lease agreement with the City. NCPA is required in its White Slough agreement with the City to inject at least 20 percent of the wastewater on a yearly basis. The remainder is returned to the WPCF. The LEC facility will be required to inject 100 percent of the water it receives. No return flow will be accepted by the WPCF. The three City documents—the lease,the agreement to return STIG wastewater, and the will-serve letter—are included in Appendix 2. The LEC plant will be a baseload plant to meet routine power demands.The plant operation will be different than the STIG plant,with process water being recycled through the system 5 to 7 times. This will result in injection water having slightly different water chemistry than that currently being injected at STIG-1,which is discussed in Attachment H of this application. Construction on the LEC plant is planned to begin in 2010,with operation commencing in 2012. The LEC-1 well is planned to be installed and tested prior to beginning plant construction. After completion of the LEC,NCPA will operate the STIG-1 and LEC-1 as dedicated wells for each of their respective plants. However,each well would serve as a "back up" well for the other in case of operational or mechanical interruptions,up to the permitted injection rate for the operating well. If this approach does not enable both plants to be fully-functional,NCPA will consider installing LEC-2 as a back up well to both STIG-1 and LEC-1.This is discussed further in Attachment O. Application Organization The EPA application form precedes this Introduction section. Each attachment specified in the application guidelines are then included.Finally,there a series of appendixes included to provide supporting information to the application. At the beginning of each attachment,the instructions included in the application are included under the header"Application Requirement." An approach section usually follows,which describes how the required information is presented. Because this application addresses an existing and two proposed wells,what is presented in the application may vary. For example, there is operating data for STIG-1 to present in Attachment H,but only modeled data for LEC-1 or LEC-2. How the data or information is presented is discussed in the Approach section. Figures for each attachment are included at the end that attachment. Supplemental information,which was either submitted as part of the original 1993 application, or is needed to support what is presented in the current application attachments,is presented as appendixes. These appendixes are included after the attachments. 2 SAC/371322/082610010(INTRODUCTION.DOC)