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,} �{/ <br /> LJ S E`�r OR <br /> Mr Mike lnfurna Y <br /> December 30, 2003 f <br /> Page 2 <br /> a <br /> Assessment dated April 7, 2003 ConocoPhilhps will be submitting an interim remedial action plan <br /> (IRAP) and work plan for onsite ozone system installation by January 30, 2004 (see below), and will <br /> include the completion of vertical assessment to that work plan s <br /> Summary of Proposed Work <br /> As indicated above, ConocoPhdlips will be submitting an interim remedial action plan (IRAP) and <br /> work plan for onsite ozone sparge system installation by January 30, 2004 ConocoPhlllips would like <br /> to install and begin operation of the onsite ozone sparge system during the first half of 2004 which will <br /> prevent the continued migration of the dissolved plume offsite The installation of the ozone sparge <br /> system is intended as an interim remedial action and will be performed in conjunction with work <br /> requested by SJCEHD The following is a summary of work requested by SJCEHD and proposed by <br /> ConocoPhillips <br /> • ConocoPhdlips proposes to submit an IRAP and work plan for onsite ozone system <br /> installation by January 30, 2004 with the goal of installing and beginning operation by June 1, <br /> 2004 The work plan will include the completion of vertical assessment <br /> • ConocoPhdlips has proposed to complete lateral assessment of the plume as outlined in <br /> Addendum to Work Plan for Off-Site Assessment dated April 7, 2003 <br /> • Following the completion of both the vertical and lateral assessment, SECOR will prepare x <br /> • and submit a Site Conceptual Model (SCM)as requested in SJCEHD letter dated May 8, <br /> 2003 <br /> • Following submission of the SCM, a Corrective Action Plan (CAP)and Remedial Action Plan <br /> (RAP)will be prepared as requested by SJCEHD <br /> If there are any questions, please call us at (916)861-0400 <br /> Sincerely, <br /> SECOR Inter atianal, Incorporated �y <br /> No.C ' <br /> Clinton Harms E*12131!06 <br /> Project Scientist <br /> r� <br /> usty enkosky, P <br /> Senior Engineer <br /> Attachments Figure 1 -Site Plan <br /> Attachment A—4th Quarter 2003 Groundwater Laboratory Analytical Report <br /> • cc Mr Ed Ralston, ConocoPhdlips <br /> x <br /> 11ConocoPhill ips\Tosco Marketing112051Work PlansVesponse letter doc <br /> 3 <br /> Y <br /> 4 <br />