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NCPA Lodi Facility MIT Procedure STIG#1 Well ( Annulus Pressure Test (APT) I Wednesday, January 7,2007 - - -1. The annulus pressure-is-maintained-at-about--120-psig-under-normal shut-in-conditions. To accomplish the casing/annulus high pressure test, the normal instrumentation for the well is modified from the configuration used in normal operations. For the test, the pressure transducer (PIT-3726) that usually transmits annulus pressure data to the central computer is disconnected and in its place the normal wellhead transducer (PIT-3725) is connected to the annulus with a temporary stainless steel tube. This modification is made in order to have a pressure transducer with an adequate operating pressure range. 2. Pressure up the tubing-casing annulus to approximately 885 psig. This pressure is greater than the 720 psig rating on the injection piping system, however, less than the maximum permitted pressure of 975 psig. Under disposal operations, the maximum operating pressure would be limited by the injection piping system. 3. Monitor the annulus pressure for a minimum of 30 minutes. Annulus pressure will be recorded by the plant's DCS computer during the test. The time,and pressure data collected during the APT will be recorded in numerical form every minute and presented in a table. In addition, NCPA will supply a graphical plot of the time and pressure recorded by the plant's computer. Both the numerical tabular data and graphic recording of the APT will be provided to NCPA's consultant, Fairchild and Wells, Inc. for inclusion in the MIT report. 4. The well will pass the annulus pressure mechanical integrity test if there is less than a five (5)percent decrease in pressure over a minimum 30 minute test period. 5. Following the monitoring period,the excess pressure on the annulus will be bled off into the receiver. Prepared 1-17-2007 Page 2 of 3 Prepared by:Fairchild and Wells,Inc.