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16 <br /> CeologkaI7~echat04 <br /> a AC. <br /> ' 110 1 7"Street <br /> Modesto,Cahforrim 95354 <br /> (209)522-4119/Fax(209)522-4227 <br /> ' REPORT <br /> ' In Situ Chemical Oxidation Pilot Test <br /> J.M. Equipment Co., Inc. <br /> ' 1245 Charter Way <br /> Stockton, CA <br /> Project No 507 2 <br /> November 12, 2004 <br /> 1.0 INTRODUCTION <br /> J M Equipment Company received a letter on November 1, 1996 from Mr Joel Weiss of the <br />' California Regional Water Quality Control Board - Central Valley Region The letter <br /> referenced a report prepared by William J Hunter & Associates for Independent trucking <br /> Facility located east of J M Equipment at 1145 West Charter Way, Stockton, CA This <br />' report dated October 21, 1996, titled Interim Report Covering Soil and Groundwater <br /> Investigation, included information from MW-9, a groundwater monitoring well placed on J <br /> M Equipment property for the purposes of defining the groundwater plume in an up gradient <br /> direction—see Figures 1 &2 <br /> Historical research was performed to determine possible sources of the gasoline range <br />' petroleum hydrocarbons found in MW-9 It was discovered that years ago this subject <br /> facility contained two underground storage tanks (UST's) and two aboveground fuel storage <br /> tanks (AST's) These tanks contained both gasoline and diesel The preliminary data from <br /> tMW-9 suggests that only the gasoline tanks released fuel <br />' Facility photographs document that these tanks were located near the southeast corner of the <br /> Hesston Shop County assessor records show that this shop was constructed in 1988 and to <br /> the best of facility employees' recollection the UST's were removed in the early 1980's For <br />' a period of several years J M Equipment used Just AST's The UST's were in the size range <br /> of 500 to 1,000 gallons and the AST's appear to be less then 500 gallons each <br />