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CERTIFICATE OF ANALYSIS <br /> Analytical Laboratory Monday,May 27,2002 <br /> TO Tim Cuellar <br /> Advanced GeoEnvironmentak <br /> 837 Shaw Road <br /> Stockton CA 95215 <br /> Aromatic Compound In Gasoline by GC/MS <br /> Sample Information <br /> Sample ID 15078-06 Sample Type- Grab <br /> Sample Description- VW 3 05-03-02 Project Name. Stockton Fire Station <br /> Date/Time Sampled. 5/3/2002 11 21 00 AM Sample Matrix Ground Water <br /> QA/QC REPORT <br /> ANALYTICAL RESULT <br /> Date LCS Spike MS Spike <br /> ?Test Parameter Method DLR Unit Result JAnalyzed Blank Cone. LCS% Conc. MS% MSD RSD <br /> Benzene EPA 8260E — 4 5 ug/L ND 45 May-02 ND 12_5 102 8% 125 1058% 1023% 080/1 <br /> _ <br /> _m. _ - _ _ _ <br /> t Toluene -- -_ W EPA 8260B_ 05 ug/L_ ND_ 05-May-02 NO � 125-mm 1030% 125 �1094% 1024% — <br /> Ethylbenzene- EPA 82606 � 06 _ — -_� ug/L ND 05-May-02—� ND 125_ 1031% 125 1070% - 1006% 15% <br /> i m,p-Xylene EPA 8260B 05 ug/L ND x 05-May-02 ND 25 1023% 25 1068% 1001% — 16% <br /> o-X lene _ ---- EPA 8260B _0 5 - uglt__ v ND w 05-May-02 —ND F� 125 mm 1034% 125 _ 1073% 1018% _13% <br /> Y _ <br /> 1 1,2-Dichoroethane(DCA) EPA 8260B 05 ug/L- ND 05-May-02 ND 125 1015% 125 - 1010%� 1019% 0 2% <br /> Methyl t-Butyl Ether(MtBE) EPA 82606 N 0-5 ug/L —_ND� 05-_May-02 ND — 125 987% _ 125 98 1% 970% Yr 0 3% t <br /> D isopropyl ether(RIPE),,. -----_ EPA 82608 - 05 ug/L — ND _ 05PMay-02 —ND __ 30 103 6% � 30µ ---- <br /> -- 2- _ -- 6% _ 0 6% <br /> 1 Ethyl-t-butyl ether(ETRE) EPA 8260B 05 ug/L ND �05-May-02 ND 30 �- 103 7% 30 99 4% 99 6% 0 0% � <br /> I Tert-amyl methyl ether(TAME) EPA 8260E 05 _ ug/L INDµ 05-May-02 NO 30 1033% 34 - 988% 976% # 03% <br /> t Butanol(TBA) w EPA 8260Bm _ - 50 —�M MJuglL ND 05 May�02 ND 150 101 1% 150w 95 9% 94-5% #0 4% <br /> t Ethylene Dibromide(EDB) EPA 8260E 05 ug/L ND 05-May-02 ND 125 1010% F 125 1016% 101*4% 0 1 <br /> TP <br /> ` H-Gas EPA 8015M/LUFT 50 ug/L µ ND ; 05-May-02 NO 500 960% 500 960% 976% 04% - <br /> TPH-Diesel EPA 8015MILUFT 100 ug/L -- ---li rv- t 05-May-02 NO _5_000 1020% _5000 960% 930% 0 8%--1 <br /> mglL <br /> % - <br /> mg/L=milligrams per Liter=ppm RSD-represent relative percent different-(RPD)between duplicates spike of samples <br /> ug/L=Hirci agrarns per Liter=ppb <br /> or Duplicate of Sample <br /> Vatha <br /> ULLY IT D, MS/MSD-measui e of the percent recovery ofciencies within the matt ix <br /> C=Composite G=Grab LGS measui e of the percent i ecovery of the Laboratory Control Spike(L(S) <br /> DLR-Detection Limitfor the Purpose of Repotting Exceptional sample <br /> ao V Le,Laboratory Director matrices of interfereneces may result in hrgher detection!units <br /> EPA-Einaonrttcntal Protection Ageiei 9 is tr nn rd 41e1 t-1 C1 az nadc-n t� s cw r 8th Pale 1 Of 1 <br /> �' Cleveland Sulfe Atoc`�fon. �"�`` �� ` e4 ro91 462-0892 Fax (209) 462.7935 <br />