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! Geological Technics Inc, <br />' 1 10 1 7`h Street <br /> Modesto,California 95354 <br /> (209)5 22-4 1 191Fax(209)5224227 <br /> 1 <br /> ' Addendum <br /> Feasibility Study <br /> 1 <br /> In-Situ Remediation <br /> ' J.M. Equipment Company <br /> 1245 West Charter Way <br /> Stockton, Cahfornia <br /> Project No 507 2 <br /> ' January 15, 2003 <br /> 1.0 ADDENDUM - FEASIBILITY STUDY <br /> ' On September 30, 2002, Mike Infurna of the San Joaquin County Public Health Services <br /> called regarding the feasibility study plan He requested that we provide case history data to <br /> ' show that to situ infection of hydrogen peroxide has worked on other similar sites <br /> This addendum provides a response to that request <br /> ' 1.1 In Situ Chemical Oxidation <br /> The process of in situ chemical oxidation has been around for a long time and has been used <br /> successfully in many applications Over the last few years a lot of attention has been given <br /> to this technology to fine-tune the destruction of contaminants that break down via <br /> oxidizing processes For those chemical compounds that are stable in an oxidizing <br /> environment (> e , Halogenated solvents) chemical oxidation is not effective <br /> ' The basis chemistry of Redox reactions is a combination of chemical reactions (changes in <br /> chemical bonding) and the transfer of electrons A more detailed explanation is, specific <br /> ' bonds are broken while others are formed when a donor gives up an electron (e) and a <br /> receptor acquires the e In the case of petroleum contamination, BTEX and TPH-G are <br /> reduced (gain of electrons and a decrease in valence) and in an aerobic environment oxygen <br /> is oxidized (loss of electrons and increase in valence) In an anaerobic environment, oxygen <br />