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h'g KLEINFELDER <br /> C CONCLUSIONS AND RECOMMENDATIONS <br /> 1 Four (4) angle soil borings were advanced beneath the vicinity of two existing 12,000 gallon <br /> USTs at the Subject site A total of 20 soil samples and 2 groundwater samples were collected <br /> for potential chemical analysis G►ab <gioundwatei was encountered approximately 14 feet bgs <br />' No hydioca►bon-like odo►s o► d►scoloiation were present in the soil or groundwatei samples <br /> collected during advaticement of the 4 Soil botings PID readings recorded from the soil samples <br /> collected ranged f i onr I I to 20 ppniv The i endings ai e likely associated with soil moisture <br /> Eight (8) of the 20 ,oil samples and mo groundwater samples collected were analyzed for the <br /> following <br /> I <br /> • Benzene Toluene Ethylbenzene Total Xylenes {BTEX] by EPA Method 8020 <br /> • Fite] Fingetpiint by EPA Method 8015M <br /> • Custom Fuel Fingerpiint identified and quantified against client supplied standards of SS- <br /> 250 and SS-1 H by EPA N4ethod 8015M <br /> the samples were analyzed on a standard Iaboiatoiy schedule requiring approximately 10 to 15 <br /> working days <br /> Unidentified extiac.table hydiocaiboris (UEH) were detected in one soil sample and both water <br /> samples at concentrations only Slighth above laboratory reporting levels UEH was detected at <br /> 2 03 mg/kg in a soil sample collected iii boring B4 at an approximate auger depth of 13%z feet <br /> The groundwatet samples collected ftom boi Ings B I and B3 had reported UEH concentrations of <br /> 0 203 mg/L and 0 407 mg/L 1espect1\civ All of the hydrocarbons detected were relatively dense <br /> (generally C,,, to C , hydrocarbon tange) Foi a summaty of the results obtained, please refer to <br /> Tables 5--1 and 5-2 in Chapter 5 of this report <br /> The trace UEH cconc,enttations found in the two "grab groundwater samples likely resulted in <br /> cross contamination frons the soils in the botehole above it Also no analytes were detected in <br /> soil or groundwatet horn the custom fuel fin`,eipirnt analyses (SC-250 and SS-1H), which lends <br /> support to this c011LILIS1011 <br /> 1 <br /> 1 <br />' 20-1108-24 EUI/20198120 Page 13 of 16 <br /> Q 1999, KlemILI&I InL I Lbruary 5 1999 <br />