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CHRONOLOGY <br /> 4010 E MAIN ST <br /> STOCKTON <br /> TANK #1 500 GALLON GASOLINE REMOVED 09-02-94 <br /> TANK #2 550 GALLON DIESEL REMOVED 09-02-94 <br /> 09-02-94 Two underground storage tanks removed from the site this <br /> date . One soil sample was collected from approx. 10 ' bgs <br /> beneath each tank. The soil sample from tank #1 showed <br /> no contamination. The soil sample from beneath tank #2, <br /> the diesel tank, showed 150 ppm diesel, 0 .24 ppm benzene, <br /> 1 .9 ppm toluene, 0 . 88 ppm ethylbenzene, and 4 . 6 ppm <br /> xylene. <br /> 11-07-94 Former tank pit area excavated this date to approx. 14' <br /> bgs . Four sidewall and one bottom samples were obtained <br /> from the finished excavation with the following results . j <br /> :.SiJMMA -XiiOF'SO <br /> ... lyS�►21MP1:E:AI!T�+iI.Y TCI�L.RESTJLTS ..... ....s::<::s`r <br /> - :. <br /> DatcroF ::::::: ::..:.:......::::::..::.:::::::::::::::.::::::._:......:::.. <br /> .....::::::::: <br /> i <br /> Sample Depth TPH-G TPH-D Benzene Toluene Ethyl Xylenes <br /> Number FBSG mg/kg mg/kg mg/kg mg/kg benzeae mg/kg <br /> mg/kg <br /> BS-i 14 ND ND O.00S 0.012 0.005 0.059 it <br /> EW I 1?S I ND ND ND ND ND ND <br /> SW 12 I 1.4 ND ND 0.007 ND 0.051 <br /> NW I 10-5 6.6 27 ND 0.037 0.045 0.48 <br /> WW I 10 ND ND ND ND ND ND <br /> SP-1-2 N/A I 20 24 0.014 0.062 0.093 OSO i <br /> DLR 1.0 10 0.005 0.045 0.005 0.005 <br /> TPH-G = total petroleum hydrocarbons-gasoline range <br /> TPH-D = total petroleum hydromtbons-diesel range <br /> mg/kg = milligrams per kilogram <br /> ND = Not detected at or above DLR <br /> DLR = Detection limit for reporting purposes <br /> FBSG = feet below site grade(appro)dmate) <br /> 1 <br /> i <br />