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C70010gical rec/ury lac. <br /> 110I Vh Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209)5224227 <br /> I � <br /> REPORTI <br /> Site Characterization. <br /> . <br /> Il � - <br /> Elving (Broadway) a- <br /> 1610 N.Broadway <br /> Stockton, California' <br /> Project No. 1218.2 <br /> February 9, 2006 `f <br /> 1.0 INTRODUCTION <br /> E <br /> The subject property (Broadway) consists of a parcel of Jand occupied by one commercial <br /> warehouse building and large gravel parking lot (see Figures 1 :& 2: Vicinity and Site Map, <br /> respectively.} In the County Assessors Records, for the years 1963, 1968 and 1974 is a <br /> listing of a 500-gallon underground fuel storage tank (UST) valued to the property. No <br /> record was .found as to the disposition of the tank. However,.=it. was reportedly filled with <br /> cement and left in place. Site inspection found evidence of what appears to be a former fill <br /> 4 pipe plugged with concrete and a former pump dispenser pad capped with concrete.' A <br /> magnetometer survey showed evidence of a small size tank-oriented west of the fill pipe <br /> structure. <br /> On July 12, 2065, V&W Drilling and Geological Technics Inc. (.GTI) personnel mobilized to <br /> - the site. Three GeoProbe boreholes (GP-1, GP-2 & GP-3) were advanced to a total depth of <br /> 20 feet below grade surface (bgs) in the locations that are shown'm Figure 2. Soil samples <br /> were obtained in each location form. 12 and 14 feet bgs', The ;`laboratory analyses of these <br /> samples revealed the presence of gasoline and diesel range petroleum hydrocarbons in the <br /> vicinity of the alleged UST. <br /> GTP s preliminary interpretation of the approximate extent oft the contamination and soil <br /> types was included in our.August 3, 2005 Tank Closure nvestFgation . GTI subsequently <br /> developed our September 26, 2005 "Soil Investigation" wo_rk plan to further define the lateral <br /> and vertical extent of petroleum hydrocarbons at the site. The work plan proposed advancing <br /> six direct push borehole and obtaining soil and groundwater samples for laboratory analysis. <br /> The following sections detail the field activities completed in accordance with GTP s work <br /> plan. <br /> 5 <br />