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Third Quarter 2005 Quarterly Groundwater Monitoring Report Stockton Center Site Authority—University Park October 18,2005 Page 5 of 6 However, Mr. Henderson also indicated that ozone sparging would not be considered by the SJCEHD until Site characterization was complete. As the plan for Site development was modified and clarified during 2003, very aggressive and timely but less cost-effective Site remediation (over-excavation, as proposed in the above described March 3, 2003 work plan) was no longer considered necessary by the SCSA. Condor, on behalf of the SCSA, proposed evaluation of Site source area remediation by pilot testing of air-sparging in combination with soil vapor extraction in a work plan dated September 15, 2004. In a letter dated November 8, 2004, Mr. Henderson of the SJCEHD expressed concern with two aspects of the proposed approach and requested submittal of a work plan addendum by January 17, 2005, addressing his concerns. Concurrently, Site development plans continued to evolve such that a structure planned for the Site vicinity was to be located well away from the Site contaminant source area and that a parking lot for the structure would be built over the Site source area. These considerations indicated the potential for consideration of less aggressive Site remediation techniques. As a result of the above considerations a meeting was held on December 17, 2004, with all concerned parties in attendance. As a result of the meeting it was agreed that Condor would prepare a work plan for additional groundwater investigation and feasibility evaluation of various remediation options for the Site. Condor subsequently prepared and submitted the Additional Groundwater Investigation and Remediation Feasibility Evaluation Work Plan, dated January 25, 2005. The above-mentioned work plan was then submitted on February 7, 2005. The work plan was conditionally approved in a letter received by Condor from the SJCEHD on April 8, 2005.The work is pending SCSA authorization to proceed. LIMITATIONS AND SIGNATURE Condor has endeavored to determine as much as practical about the Site within our scope of services using accepted principles and professional practice at the time the work was performed. Condor's involvement in the work performed for this report has been limited to collecting and recording system measurements and parameters; collecting and shipping samples; compiling field data and data provided by analytical laboratories; and interpreting field and laboratory data. Condor makes no representation as to the subsurface conditions at locations or times other than those sampled by our employees and reported in this document. Condor is not responsible for the accuracy and completeness of information collected and developed by others. This report was prepared by Condor under the direct supervision of a Certified Hydrogeologist in the State of California. The report was prepared at the request of, and is for the sole use of, the SCSA. If any changes are made or errors found in the information used for this report, the interpretations and conclusions contained herein shall not be considered valid unless the changes or errors are reviewed by Condor and either appropriately modified or re-approved in writing. The contents of this report may not be used or relied upon by any other person(s)without the express written consent and authorization of the SCSA and Condor. Any questions regarding the content of this document should be addressed to Don Kresse at(209) 234-0518. t, CONDOR