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s Chevron Products Company ( Page 5 Chevron Service Station#9-0557, l—_ 'outh Center Street,Stockton,California November 28,2001 Revised Schedule A revised schedule for the completion of the work proposed within this addendum and the Work Plan is presented as Figure 3. As of the date of this addendum, five of the six t monitoring or extraction wells proposed in the Work Plan have been installed at the site. .Among the five wells installed is monitoring well MW-9S, which was proposed to Dot Lofstrom of SJCEHD, and approved by Ms. Lofstrom, verbally in a telephone conversation, with David Evans of SECOR on June 29, 2001. The final monitoring well proposed in the Work Plan,MW-13, will be installed once an encroachment permit with either the City of r Stockton or the California Department of Transportation can be obtained. SECOR will not , begin the OS pilot test until MW-13 is installed. The aquifer testing proposed in the Work Plan has also been completed. The schedule shown in Figure 3, which includes estimated work plan review and comment period by SJCEHD and estimated duration for permitting required with SJCEHD, outlines the estimated schedule for the remaining tasks proposed in the Work Plan and this addendum. If there are any questions regarding the contents of this revised work plan,please call us at 916.861.0400. Sincerely, SECOR International Incorporated avid M. Evans William E. Brasher, P.E. Project Scientist Project Manager Attachments: Figure 1 Site Location Map Figure 2 Site Plan with Proposed Pilot Test Facility Locations Figure 3 Revised Schedule Attachment A Field and Laboratory Procedures Attachment B Ozone Sparging Equipment Details cc: Bob Cochran, Chevron Products Company, San Ramon Marty Hartzell, Regional Water Quality Control Board, Sacramento I:\Chevron\90557\REPORTS\Feasibility Study\03_Addendum.doc