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Groundwater. investigation Report <br /> Ragu Foods, Inc. <br /> Stockton, California <br /> 1-,0 Introduction <br /> The following report presents the methodologies, findings and <br /> conclusions for a shallow groundwater and subsurface soils <br /> investigation as delineated the <br /> The Groundwater in investigation <br /> program Work. Plan of April <br /> on the determination of the extent of diesel residues in the <br /> shallowlosoils and cated at 1400 roundwater at Road, StogCuton o CA, Inr. facility <br /> (RAGiJ) <br /> ' 2.0 Site Back round <br /> On June 26, 1986, three underground tanksnear were removed from an <br /> area east of t��� ariksbincluded one 1000egallon gasolineatank, <br /> property line. <br /> one 550 " gallon solvent tank and one 520 gallon diesel twer <br /> Prior to removal of the tanks, San Joaquin County officials were <br /> on <br /> notified and procesring <br /> s. <br /> As the tanksntative of twere he oremoved,unty s the diesesite l <br /> the removal p Port of its contents into <br /> appeared to have leaked an unknown Pto <br /> the adjacent soil- Sufficient <br /> s backfilled removenear sur face pgrade. <br /> tank removal and the area <br /> on March 30, 1987, three soil borings were drilled by RAGU in the <br /> . All of t <br /> were <br /> vicinity of the. excavated area Two of ntghe boringsanced were <br /> to 30 feet below ground surface (BGS) • <br /> located about 10 feet to the eas <br /> wasplacedt and 0 directly feet to tthraugh the old <br /> excavated area. One boringn clean <br /> aples <br /> diesel tanksite. <br /> rozenolands sem <br /> to a collectedlaboratory <br /> for analysis abY <br /> tubes, capped, <br /> EPA Methods 8020 (aromatic volatile organics) <br /> 8010 (halogenated <br /> diesel (total petroleum hydrocarbons) <br /> volatile organics) . The resultsof indicated the soil ut the <br /> been significantly <br /> -. h <br /> boringtdi sEI fuel end (all none samplenk had tshowed nondetectable <br /> impacted by parameters.) Analyses of samples <br /> concentrations for all analytic P <br /> taken from the boring placed through the old tank location did <br /> lso showed <br /> el in the <br /> indicate the <br /> presence decreases ofdiesel <br /> die eluconcentrations, with but a increasing <br /> subs encountered groundwater, and all <br /> depth. None of the borings following completion of the <br /> borings were grouted to the surface <br /> sampling. <br /> In December 1987, Roy F. Weston, Inc. (WESTON) was contractWESTON <br /> ed by <br /> - _RAGU_ to 'continue the investigation. on April 29, 1988, Health------- -r� _—_-_ - - - -- Local Health <br /> - -- <br /> submitted a work-plaji-to --the--San--Jaaquzn- County_-- --__--- <br />