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ZNVOKO- ITI (rd CERTIFICATE OFANALYSIS <br /> Analytical.LabOratory Tuesday,AZarch 12,2002 N <br /> TO: William Littre m <br /> Advanced GeoEnvironmental <br /> 837 Shaw Road <br /> Stockton CA 95215 LO <br /> Lo <br /> Aromatic Compound in Gasoline by GCWS <br /> Sample Information M <br /> Sample ID: 14494-01 Sample Type: Grab <br /> Sample Description: Tank 01 North End Project Name: 4040 E.Main ST. <br /> N <br /> Date/Time Sampled: 3/612002 4:30:00 PM Sample Matrix: Soil o <br /> ANALYTICAL RESULT QAIQC REPORT <br /> Date LCS Spike MS Spike <br /> ,Test Parameter Method DLR Unit Result .Analyzed Blank Cone LCS"!o Cone. MS°rb MSD RSD <br /> Benzene EPA 8260B 5 ug&g ND 0B-Feb-02 ND 12.8 90.096 13 $7.1% 94.4% 0.7% <br /> Toluene EPA 8260B 5 Ug1kg ND 08-Feb-02 ND 12-8 90.0% 12.8 100.6% 1D0.0% 0.2% <br /> Ethylben:ene EPA 82608 5 ug/kg NO 08-Feb-02 ND J12-8 88.0% 12.8 109.4°x6 95.2% 3.5% <br /> r" Xylene EPA 82608 5 ug/kg RD 08-Feb-02 ND 25.6 87.5% 25.6. 97.2% 97.7% 0.1% m <br /> ' <br /> o Xylene EPA 82608 5 ug/kg Nit} DB-Mar-02 NO, ^12.8 $9.5% 12.8 9Q.9% 98.D% 8.3% Cn <br /> 1,2-01chloroethana-&t3anrogaft) %Recovery 110% <br /> 4-BF8-(Surrogate) %Recovery 112% A <br /> orWL=mrrrigraas per Liter=plan RSD-represent reltrrive percent different(RPDJ between dupitcaies spike of saarples <br /> ugi"L=ruitrogrmns per Liter=ppb or ihrplicete of Snnipre <br /> .RE.SPE TT'UL M L'D, &MMSD-oreosure of rite percrol reroteq efriendes within!ho nudr•iv <br /> C=Con paxBe c=crab <br /> LCS-measure of the percent recovery ojtlre cabaroroo-Control-Spike(LC.) <br /> DI.R-Daeaian Limit for rhe Prirpase ot-Reporting. Ezceptionol sompie <br /> J <br /> Ain Hao t! Le, Laboratory Director inairi res or•inrerfer•eueces may rmilt In hr her detection limits <br /> D <br /> M <br /> CS) <br /> N <br /> EP I-Lri�ironrnenrrrl Protection.tgenc}Alethod. Sd1-Standard,A4c thud for Exnorlrurriar ajli'otcr lirrsrewnter I��rh Ed. Page 1 of I <br /> .i45 F_ (:IPvPlarid St. Suite A Stockton. CA 95204 Tel.: (209) 462-0892 Fax: (209) 462-7935 <br />