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101 <br /> y <br /> ' REPORT <br /> COfiTI1?UING SUBSURFACE IYDROCARBON INVESTIGATION <br /> F FORMER EXXON SERVICE STATION <br /> 909 BEST HAMMER LANE <br /> ^ I STOCKTON. CALIFORNIA <br /> r D� goQ� <br /> AUGUST 21, 1987 C��� � N'- � <br /> "= INTRODUCTION <br /> r <br /> k <br /> This report presents . the results of Groundwater Technology, <br /> Inc. 's (GTI } most recent investigation at the former <br /> Exxon service station located at 909 West Hammer Lane in <br /> }' Stockton , California (see Figure 1 <br /> Site Location Map) . The <br /> investigation was performed in accordance <br /> with a work request <br /> dated . May 13, 1987 from Jim Kerr of Exxon Company U.S.A. In <br /> brief, the investigation g was to include drilling of . two soil <br /> € . ..borings soil sampling/analysis , installation of t <br /> z: <br /> wo new <br /> monitoring wells. in the borings, and water sampling and analysis <br /> of the new wells as weI3 as the. three existing wells on site. <br /> - a 3 <br /> SN <br /> BACKGROUND <br /> - - . <br /> ' The site is located in central Stockton in an area of mixed residential ' and commercial u'se. The Exxon `station has been <br /> Z.k <br /> closed since November. of 1985 due to failure of <br /> .:..Pr.oduct_._l.ine.;._.__ <br /> Subse uentl <br /> q y the underground fuel storage. tanks , product ' lines - <br /> P <br /> k <br /> ' pump is lands an d' buildings were removed "from the site. , <br /> G <br /> Previous work was done on tlie" site by Groundwater Technology <br /> In January and December_.of 19"86 <br /> All <br /> This work consisted of. the <br /> installation. of three monitorin <br /> f g wells, the drilling of foar soil <br /> RM <br /> ME <br /> Y borings and the collection . of soil samples_ from the tank pit <br /> excavation during. .tank removal . <br /> PT'= 1 <br />