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ATTACHMENT C:CORRECTIVE ACTION PLAN AND WELL DATA Only one of the wells drilled within the AOR is actively producing hydrocarbons. The Quintana Piacentine#1-27 (located approximately 13/4 miles west of the STIG-1 well) produces gas from the Mokelumne Formation.The Mokelumne Formation is just below the Capay Shale,which is the lower confining zone for the STIG well. Information available on the DOGGR Web site is also provided for this well in Appendix 4. To confirm that the injection at the STIG-LEC facility would not compromise any of the existing deep wells within the AOR,an assessment of the change in pressure at each well was conducted. These results are shown in Table C-2 and Figure C-3. The closest well, City of Lodi#1,is approximately 1,840 feet from the injection site. This well was plugged back at the base of the surface casing. Hydrostatic pressure of the abandonment mud was reported as 75 lb/ft3. The pressure applied at 4,100 feet by the mud is approximately 345 psi greater than hydrostatic. At 1,840 feet,the pressure increase due to injection is shown by Table C-2 to be less than 200 psi. This suggests that even without the cement plugs in place,the mud pressure more than balance the increase in pressure expected due to injection operations.Similar calculations are provided in Table C-2 for the other wells in the AOR. In summary,within the 2-mile AOR there are only two known existing gas wells,injection wells,or other wells for any other purpose that penetrate the confining layer above the proposed injection zone that have not been properly destroyed. These are an active gas well and the active STIG-1 injection well. C-2 SAC/371322/082550018(ATTACHMENT-C.DOC)