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5 <br /> 1 819 Sinker Ave Ste 8 <br /> Sequoia Sacramento C16) A 95914 <br /> Analytical (9uoiala scom <br /> FAX(916)921-0100 <br /> r www sequoialalss com <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA S303055 <br /> 6747 Sierra Court,Ste J r Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/19/03,18 34 <br /> Gasoline (2-Methylpentane to 1,2,4-Trlmethylbenzene) and BTEX by EPA 8015M and 8021B- Quality Contr r, <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3030107-EPA 5030B (PIT) <br /> Laboratory Control Sample(3030107-BS3) Prepared&Analyzed 03/10/03 - <br /> Benzene 991 050 ug/1 100 99 70-130 <br /> Toluene 994 050 100 99 70-130 <br /> Ethylbenzene 972 050 100 97 70-130 <br /> Xylenes(total) 299 050 300 100 70-130 <br /> Methyl tert-butyl ether 106 20 100 106 70-130 <br /> Surrogate a a a-TriJluorotoluene 100 100 100 60-140 <br /> Laboratory Control Sample(3030107-BS4) Prepared& Analyzed 03/11/03 <br /> Benzene ' ' - 937 `0 50 ug/l 100 - -94 ' '70-130 w <br /> Toluene 910 050 100 93 70-130 <br /> Ethylbenzene _ 914 V_ --050 100 93 70-130 - <br /> Xylenes(total) 290 050 300 97 70-130 <br /> Methyl tert-butyl ether 988 20 100 99 70-130 <br /> Surrogate a a a-Trifluorotoluene 950 100 95 60-140 <br /> Laboratory Control Sample(3030107-BS6) Prepared-&An'alyzed`03/13/03—�" <br /> Benzene 948 050 ug/1 100 95 70-130 <br /> 941 T 050 �" 100 � 94 70-130 - <br /> r=Ethylbenzenc--� X100— __—_> 94= -70 130— T__ _ — F T - <br /> Xylenes(total) 29 5 0 50 300 98 70-130 <br /> Methyl ten-butyl ether 104 2 0 100 104 70-130 <br /> Surrogate a a a-Trifluorotaluene 963 100 96 60-140 <br /> Matrix Spike(3030107-MSI) Source S303045-02 Prepared 03/07/03 Analyzed 03108103_ <br /> Benzene 920 0 50 ugA 100 ND 92 60-140 <br /> Toluene 908 050 100 ND 91 60-140 <br /> Ethylbenzene 897 0 50 10 0 ND 90 60-140 <br /> Xylenes(total) 266 050 300 048 87 60-140 <br /> Methyl ten-butyl ether 837 2 0 100 024 81 60-140 <br /> Surrogate a a a-Tr ifluorotoluene 938 100 94 60-140 <br /> Sequoia Analytical - Sacramento The iesults in this iepott apply to the samples analyzed in accordance with the clam of <br /> custody document Unless other+ise stated results are repot red on a wet weight basis <br /> This analyrical repot t must be i eproduced in its entirety <br /> Page 17 of 24 <br />