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ENWHKOC -TECH CERTIFICATE OF ANALYSIS <br /> Analytical Laboratory <br /> Monday,May 27,2002 <br /> TO. Tim Cuellar <br /> Advanced GeoEnvlronmental <br /> 837 Shaw Road <br /> Stockton CA 95215 <br /> Aromatic Compound to Gasoline by GC/MS <br /> Sample Information <br /> Sample ID 15078-05 Sample Type- Grab <br /> Sample Description VW 2d 05-03-02 ProjectName- Stockton Fire Station <br /> Date/Time Sampled 5/3/2002 12 40 00 PM Sample Matrix Ground Water <br /> ANALYTICAL RESULT f QA/QC REPORT <br /> i Date LCS Spike MS Spike <br /> Test Parameter Method DLR Unit Result I Analyzed Blank Conc LCS% Conc. MS% MSD RSD <br /> i Benzene EPA 8260B 05 ug/L 640 00 05-May-02 SND 125 1028% 125 1058% 1023% 08% <br /> Toluene ^^ __w-- vEPA 8260B� _-_ 0 5 _ ug/L w� 38T70_ _ 05-May-02 SVD __125--_ 1030% w 12 5 - 109 4% 102 4% --1 7% t <br /> Ethylbenzene EPA 82606 05 ug/L 5920 05-May-02 ND 125 1031% - 125 1070% 100 6% 1 5% <br /> m,p-Xylene EPA 8260B 05 _ ug/L 16400 05-May-02 ND 25 102_3% 25_ 1068% Y 1001% 16% 1 <br /> - - <br /> o-Xylene EPA 8_2608- 05 y -ug/L 2050 05-May-02 ND 125 1034% 125 1073% 1018% 13% t <br /> ' 1,2-Dechoraethane(DCA) -' _ EPA 82608-- —� - 0 5 uglL _ 106 ' 05-May-02_,.. ND � 12 5 101 5% _1_2__5_101_0%___ __101.9_% 0 2% <br /> Methyl t-Butyl Ether(MtBE)^ -- E_PA 8260B - M 0 5 V - ug/L_W 51 60 05-May-02 - ND�~--12 5� 987% �12 5-�yv98 1% 97 0% 03% @ <br /> Dusopropyl ether(DIPE) �EPA 8260B - 05 uglL _ 1310 - - 05-May-02 ND µ_- 30 1036% 30µ_ 1022%___970%---- <br /> 996%�W~ 06% <br /> Ethyl-t-butyl ether(ETRE) E=PA 82608 05 ug/L _ ND 05-May-02 ND - 30 1037% 30 _ 994% 996% 00% i <br /> Tent-amyl methyl ether(TAME) EPA 82608 05 uglL <br /> 6100 05-May-02 ND 30 1033% 30 988% 976% 03% ' <br /> LI-Bu (TBA) _ EPA 82605 50 . ug/L $$00 05 May02 ND _150_ - 101 1% 150 95_9% 945% 0 4% i <br /> Ethylene D�bromtde(EDB) AA EPA 82608 - � 0 5 ug/L ND m05-May-02 ND 12 5 101 0% 12 5 101 8% 101 4% �p 1% <br /> TPH-Gas -�� EPA 8015WLUFT 50 ug/L 4580 05-May-02 � ND 500 960% 500 960% 976% 04% <br /> � <br /> -_- ._ _ _ _.._._..__ <br /> TPH-Diesel EPA 8015MILUFT 100 ug/L ND 05-May D2 ND 5004 102 4% 540D 96 4% 93 0% <br /> mg/L=milligrants per Luer=ppm RSD-tepresent relative percent d tereni(RPD)between duplicates spike of samples <br /> ug/L=niici ograms per Liter=ppb of Duplicate of Sample <br /> RE P TFU C=Composite G Grab S TED, MS/MSD-measure of the percent recovery efficiencies within the matt[x <br /> = <br /> LCS-measure of the percent recovery of the Laboratory Control Spike(LCS) <br /> '- -�— - DLR-Detection Lima for the Purpose of Reporting Exceptional sample <br /> ono ban Hao V Le, Laboratory Director matrices of interfereneces may result in higher detection limns <br /> EPA-Environmental Protection Agenc,7 i1 Cleve� D� ai {} ei�d m on[df�ii lQaje�vrtt�G{8rh�l�?��� 462-0892 Fax (209) 462-7935 � Page I of I <br />