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C,e0logical Teck>tics //,C. <br /> 1172 Kansas Avenue <br /> Modesto,California 95351 <br /> (209)522-4119/Fax#522.4227 <br /> www.eticnv.com <br /> March 5,2012 <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: 1"Quarter 2012- Groundwater Monitoring Report <br /> Location: George's Service Station, 1600 Durham Ferry Road,Tracy, CA <br /> Dear Mr.Teranishi: <br /> Geological Technics hrc, has prepared this Groundwater Monitoring Report for the Is' <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 die 151 quarter of 2012, and <br /> outlines the next proposed sampling and analysis event. <br /> 15t Quarter 2012 Activities <br /> No sampling and analysis of groundwater monitoring wells took place during the I' <br /> quarter of 2011, per correspondence prepared by San Joaquin County Environmental <br /> Health Degarunent(SJCEHD)dated July 21, 2009, which directed semi-annual sampling <br /> (2"d and 4 quarters) and annual sampling (4d'quarter) of monitoring wells on Site. <br /> On March 1, 2012 the air sparge system was started and is sparging into wells OS-1 and <br /> OS-2. A remediation installation report is in progress and is expected to be complete by <br /> end of March 2012. <br /> Proposed 2nd Quarter 2011 Activities <br /> It is anticipated that annual groundwater monitoring and sampling of select groundwater <br /> monitoring wells will take place during the 2"d quarter of 2012. <br /> Ist QMR 12 letter format.docx I of 2 <br />