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GROUP <br /> 302 Pendleton Way <br /> Oakland,CA 94621 <br /> License No.724938 <br /> October 9, 2007 <br /> Ms. Anne P. Conner <br /> Environmental Services <br /> Pacific Gas&Electric Company <br /> 375 North Wiget Lane, Suite 200 <br /> Walnut Creek, CA 94598 <br /> Subject: Work Plan for Soil and Groundwater Characterization under Pond 3 <br /> PG&E McDonald Island Gas Storage Facility <br /> McDonald Island, California <br /> Dear Anne: <br /> Attached please find MSE's Work Plan for Soil and Groundwater Characterization under <br /> Pond 3 (work plan) that details activities to be conducted within the Pond 3 footprint at the <br /> McDonald Island Gas Storage Facility. Site activities will include mobilization, set up, soil <br /> and groundwater sample collection, and demobilization. This work plan is structured as <br /> follows: Section 1 summarizes regulatory and historical background, provides detail <br /> regarding the purpose and objective of this work, and overviews current site conditions. <br /> Sections 2 and 3, respectively, discuss field support tasks and soil and groundwater <br /> sampling activities to be conducted. The sample analysis plan, data review, and process <br /> reporting are discussed in Section 4. Section 5 overviews data evaluation through both <br /> geochemical and statistical analyses and Section 6 provides references. <br /> MSE looks forward to working with PG&E on these tasks. Please do not hesitate to <br /> contact Dr. Robert Ellgas or the undersigned at (510) 383-9600 with any questions on the <br /> approach or schedule. <br /> Sincerely, <br /> MSE Group <br /> ��Z,i�—— <br /> Carl Hackney <br /> President and Managing Principal <br /> Attachment: <br /> Work Plan for Soil and Groundwater Characterization under Pond 3 <br />