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CERTIFICATE OF ANALYSIS <br /> Analytical Laboratory <br /> 11'ednesduy,September 04,2002 <br /> TO William Little <br /> Advanced GeoEnvironmenta) <br /> 837 Shaw Road <br /> Stockton CA 95215 <br /> Aromatic Compound in Gasoline by GC/MS <br /> Sample Information <br /> Sample ID, 16638-03 Sample Type Grab <br /> Sample Description MW-5 083002 Project Name COS-Fire Station#2 <br /> Date/Time Sampled 8/30/2002 11 09 00 AM Sample Matrix Ground Water <br /> ANALYTICAL RES ULT��..� QA/QC REPORT <br /> Date � LCS Spike..-..,,. . MS Spike <br /> FTest Parameter Method DLR Unit Result Analyzed Blank Cone LCS% Colic MS% MSD RSD <br /> Benzene CEPA 8260B 05 ug/L NDS 30-Aug-02 NO 8 1029% 8 1013% 1025% 03% ' <br /> Toluene �^ EPA 8260B 05 ug/L ND x�30-Aug-02 NO $V 1075% _ 8 1025% 1050% 06% c <br /> EthyIbenzene _ EPA 8260B_ 0 5 ug/L ND - 30 Aug-02 NO_- 8 _ 1029% 8 1025% 10-00% _0_6% <br /> m,P-xylene - _ EPA 8260B 05 ug1L NO - 30-Aug-02 _NµNO 16 1053% 16 106,3% 1031% 07% v <br /> 0-Xylene EPA 8260B 05 ug/L ND 30-Aug-02_ _ND _ 8 1043% 8 1025% 1063% 09% <br /> 1,2-Dich_oroe-thane(DCA) EPA 8260B 05 ug/L ND 30-Aug_-02 NO 8 1008% 8 1003% 1000% _0«1% -M s <br /> Methyl t-Butyl Ether(MtOE) - EPA 82608 05 ug/L ND 30-Aug-02 - NO - 8 1063% 8 1025% 1050% 06% <br /> Dusopropyt ether(DWE) EPA 8260E 0 5 uglL N❑ 30-Aug 02 ND_ 18 100 0% 18 94 4% 100 0% 1 4% , <br /> i Ethyl-t-butyl ether(ETRE) EPA 8260B _0_5 uglL ND 30-Aug-02 NO 18 1002% 18 1056% 1111% 13% <br /> Tert-amyl <br /> 3%Tert-amyl methyl ether(TAME) W�EPA 82_606 05 N ug/L ND 30-Aug-02 NO 18 943% 18 944% 1000% <br /> 14% <br /> t-But anol(TBA) _ EPA 82608 µ50 ug1L ND #_ 30-Aug-02 NO 100 920% 100 920% 980% 16% <br /> Ethylene Dibromrde(EDB) _ _ EPA 82608 « 0 5 ug/L NO 30-Aug-02 NO 8- 960% 8 988% 963% 06% <br /> TPH-Gas _EPA 8015MILUFT 50 uglL ND ;� 3_0-_Aug-02 NO 500 1080% 500 1100% 104_0% �1 4%m <br /> TPH-Diesel EPA 8015M/LUFT 100 ug/L ND -_30-Aug-02 NO 5000_ 960% 5000 980% 1020% 10% s <br /> mg/L=nullrgraun pet I ilei =pprn RSD-,epresent r elaitve percent different(RPD)hmi c ur dupla ares%pike of samples <br /> ug/L=mrrrogranis per bier=pp6 p1 Duphcare of Sonlple <br /> P C ULL I ED, MS/�Y15D measure of Me percent recove+l efficiencies it ulrur l,e n,trrraa <br /> C=Conrposrre G=C,rrb <br /> LCS nieasare of the percent recon ey of the Lrtbotator s (oiur o!Sprite(1 GS) <br /> DLR-Detectroa,Luau for tltc Purpose of Repor ting 1 s(epuuoal sample <br /> Jo rat]i it Hao v Le, Lahnratory Director matrices or ,,uerferencces may result in higher Mee nwi limn <br /> r <br /> 1 <br /> rPA I r,irrar,neraal P+arttira,e 4genc)5 of Cleve Ian r�5�ar fi�r{q t ,(l b r�� ;, r,�'r95n4e��aq attt�l pg) 462-0892 Fax (209) 462-7935 Puce ! of I <br />