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Geological Technics Inc. <br /> 1172 Kansas Avenue <br /> Modesto,California 95351 <br /> (209)522-4119/Fax#522-4227 <br /> www.gtienv.com RECEIVED <br /> NOV 0,12012 <br /> October 23, 2012 <br /> PERITES TM <br /> M85MCE <br /> Project No.: 425.2 <br /> Project Name: George's Service (Durham Ferry Road) <br /> Sheldon Teranishi <br /> 1600 Durham Ferry Road <br /> Tracy, CA 95304-8799 <br /> Re.: Report: 3`d Quarter 2012- Groundwater Monitoring Report <br /> Location: George's Service Station, 1600 Durham Ferry Road,Tracy, CA <br /> Dear Mr.Teranishi: <br /> Geological Technics Inc. has prepared this Groundwater Monitoring Report for the 3`d <br /> quarter 2012 in letter format, in compliance with C.C.R. Title 23, Division 3, Chapter 16 <br /> Section 2652. This quarterly report summarizes activities For the 3`d quarter of 2012, and <br /> outlines the next proposed sampling and analysis event. <br /> 3rd Quarter 2012 Activities <br /> Groundwater Monitoring Activities <br /> No sampling and analysis of groundwater monitoring wells took place during the 3`d <br /> quarter of 2012, per correspondence prepared by San Joaquin County Environmental <br /> Health Department (SJCEHD) dated November 141i, 2011, which directed annual <br /> sampling (2nd quarter) of select monitoring wells on Site. In a letter dated October 121i, <br /> 2012, GTI recommended that the Sites annual groundwater monitoring be modified to a <br /> quarterly frequency. The recommended groundwater monitoring plan was approved by <br /> SJCEHD in an email dated October 12th, 2012. The groundwater monitoring plan was <br /> modified by the following: <br /> • Increase groundwater monitoring from annual to quarterly. <br /> 3rd QMR 12 letter format.doc l of 4 <br />