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Stantec <br /> April 30, 2010 <br /> Page 4 of 4 <br /> Reference: First Quarter 2010 Site Status, Groundwater Monitoring and Remedial Summary Report- <br /> Stockton Terminals Technical Committee Facilities <br /> Appendix K-Ozone Injection Well Monitoring Program and Revised Contingency Plan <br /> TRIGGER WELLS CONTINGENCY PLAN <br /> If concentrations of compliance analytes have increased to above water quality objectives for <br /> three consecutive quarters in trigger wells OW-2A, OW-4A, OW-213, and OW-413, a third ozone <br /> sparge array will be installed east of those wells to destroy the remaining petroleum <br /> hydrocarbons and MTBE. The ozone wells will be constructed as proposed in the CAP and a <br /> separate ozone sparge remediation system will be constructed similar to the systems proposed <br /> in the CAP. <br />