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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX equoi labs2 1 Co 0 <br /> www sequotalabs coin <br /> ler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA 5303555 <br /> 40 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Risse 04/04/03 18 05 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B- Quality Contr <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunit Units Level Result %REC Limits RPD Lunit Notes <br /> Batch 3030405-EPA 5030B PIT <br /> Laboratory Control Sample(3030405-BS1) Prepared&Analyzed 03/25/03 <br /> Surrogate a a a-Trifluorotoluene 786 ugfl 100 79 60-140 <br /> Laboratory Control Sample(3030405-BS2) Prepared&Analyzed 03/26/03 _ <br /> Benzene 888 050 ug/1 100 89 70-130 <br /> Toluene 8 88 050 100 89 70-130 <br /> Ethylbenzene 872 050 100 87 70-130 <br /> Xylenes(total) 277 0 50 300 92 70-130 <br /> Methyl tert-butyl ether 976 2 0 10 0 98 70-130 <br /> Surrogate a a a-Tr fruorotoluene 897 100 90 60-140 <br /> AdhDratory Control Sample(3030405-BS3) Prepared&Analyzed 03/31/03 <br /> ene 9 05 050 ug/l 100 90 70-130 <br /> Toluene 8 85 050 100 88 70-130 <br /> Ethylbenzene 8 76 050 100 88 70-130 <br /> Xylenes(total) 276 050 300 92 70-130 <br /> Methyl tert-butyl ether 968 2 0 100 97 70-130 <br /> Surrogate a a a-Tnfluorotofuene 816 100 82 60-140 <br /> Matrix Spike(3030405-MSI) Source 5303371-04 Prepared&Analyzed 03/26/03 <br /> Benzene 8 88 050 ug/1 100 ND 89 60-140 <br /> Toluene 910 050 100 0 19 89 60-140 <br /> Ethylbenzene 878 050 100 ND 88 60-140 <br /> Xylenes(total) 278 050 300 ND 93 60-140 <br /> Methyl tert-butyl ether 999 2 0 100 032 97 60-140 <br /> Surrogate a a a-Triuorotoluene 900 100 90 60-140 <br /> Matrix Spike Dup(3030405-MSD1) Source 5303371-04 Prepared&Analyzed 03/26/03 <br /> Benzene 888 0 50 ug/1 100 ND 89 60-140 0 25 <br /> Toluene 9 08 0 50 100 0 19 89 60-140 0 2 25 <br /> Ethylbenzene 8 76 0 50 100 ND 88 60-140 0 2 25 <br /> Xylenes(total) 27 8 050 300 ND 93 60-140 0 25 <br /> oia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated,results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 8 <br />