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Geofogicaf?echnics Inc Page 2 Work Plan Valentine(Castle Motors) Project No 723 2 October 13, 2000 2.2 We ba Well Abandonment The location of the well on the property limits accessibility, therefore, positioning a drill rig over the well is not possible The exact abandonment process will need to be determined after the video survey is performed However, regardless of what other technologies may or may not be used in the abandonment process, remote pressure grouting is proposed as the method to fill the well The pressure grouting process is as follows • A neat cement grout (containing less then 4% bentonite) will be pumped under pressure through a tremie pipe to the bottom of the well In this manner, the grout will displace the water in the well insuring that it is completely filled with grout • After the grout has displaced all water from the well and flowed over the top, a pressure cap will be fitted to the casing and additional grout will be pumped into the well casing under pressure This will force the cement into the filter pack • The amount of cement grout volume needed to fill the well will be calculated and the amount utilized will be tracked to judge the effectiveness of the process • After the grout has been installed, the top of casing will be cut off to a maximum of 12 inches below grade and the hole will be filled with clean dirt to ground surface Other technologies will be evaluated upon review of the well video log and discussed with San Joaquin County personnel An addendum will be submitted if other work is to be performed 3.0 SCHEDULE & REPORTING Geological Technics Inc anticipates beginning fieldwork no later than 30 days after work plan approval, issuance of the abandonment permit, and upon cost pre-approval by the USTCFP ' It is anticipated that there may be a delay in negotiating access to the well from the property owner, however, every effort will be made to move this project forward in a timely manner The information gathered during this phase of work will be presented in a report Dr Ray Kablanow, a registered geologist, will supervise this project Copies of the report will be submitted to the client, SJC PHSCEHD, RWQCB-CVR and USTCFP r 10 i