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W <br /> CERTIFICATE OFAIVALYSIS <br /> COAnalytical Laboratory <br /> Teeesdety,March 12,2002 ^� <br /> TO: William Little m <br /> Advanced Geo Environmental w <br /> 837 Shaw Road <br /> Stocktun CA 95215 <br /> LD <br /> Aromatic Compound in Gasoline by GC/MS <br /> N <br /> Sample Information CD <br /> Sample 1D; 14494-04 Sample Type: Crab <br /> Sample Description: Tank#2 South.End Project Name: 4040 E.Main ST. <br /> DatwTime Sampled: 316/2002 3:25:00 PM Sample Matrix: Soil 00 <br /> ANALYTICAL RESULT QA/OCR.EPORT <br /> :Date LCSSpike MS Spike <br /> Xest Parameter Method DLR Unit Result ;Analyzed Blank Cona LCS% Conc.. MS% MSD RSD <br /> Benzene EPA 8260B 5 ugekg ND 08-Feb-02 NO 12.8 90.0% 13 97.1% 94.4% 0.7% <br /> Toluene EPA 826DB 5 uglkg ND 06-Feb-02 NO 12.a 90.0% 12.8 11.00.6% 1 DD.O% 0.2% <br /> Ethylbemene , <br /> -.EPA 82606 :... .. . ,F.e' . --N'-.:.. . - .:_...._: .:... ...... .,: T. :..... ... . <br /> 5 uglkg 448 08 Feb-07 ND 12.8 88.0% 12.8 109.4% 95.2% 3.5% <br /> m,p-Xylene EPA 82606 5 uglkg 2180 08-Feb-02 NO 25.6 87.5% 25.6 97.2% 97.7% 0.1% m <br /> o-Xylene EPA 82608 5 ugAcg 29 08-Mar-02 ND 12.8 89.5% 12.8" 96.9% 98.0% D.3% rco <br /> 1,2-Dichlowethane-d4(Surrogate) %Reoavery 105"/0 p <br /> 11 <br /> 4BFB-(Surrogate) %Reome 104 - <br /> : <br /> 0 <br /> nrprL =milligrarns per Lftet=pp." R.SD-reprayene relRli.W percene if a vni(RPD)belween duplicates spike of sarirples <br /> uglL=rnfcmgreuns per Lifer=ppb or.D:rph"ne of Sample <br /> P FULL I �'Di 415'/,L1,SL)-nreasureafthepeixentrrcoseiyectencitsxllhirrthemntrix <br /> C=Composite G=Grab <br /> LCS'-measure of the perces!recovery of the Laboratory Control Spikc(LC;S)_ <br /> Jai ath n Hao L:Le, Laboratory Director DL.R-Deteefian Limit for Vie Purpose o/'Reporting. Ereeptitnrat wimple <br /> matrices or-inrerferenecas may result in higher demeceion 1 imiis• <br /> n <br /> M <br /> EP t-£nvironeiremed Protection Agency Method. SA 4fernrlarrl M rthoif fot•famtiinalion of!Yater Y} ntevvate r 181h Eel. page 1 0J'l <br /> 545 E. Cleveland St. Suite A Stockton. CA 95204 Tel.: (2091462-0892 Fax: (209) 462-7935 <br />