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N 819 Striker Avenue Suite 8 <br /> Sequoia _ Sacramento CA 95834 <br /> (916)9zt 9600 <br /> +� <br /> r FAx(916)921-0100 <br /> Analytical 1nalytical www sequoialabs corn <br /> Getter-Ryan-Petaluma Project Former Tosco 6981,Stockton,CA <br /> 1364 N McDowell Blvd Ste B2 Project Number NIA Reported <br /> Petaluma CA,94954 ProjectManager Dave Vossler 06/26/02 13 41 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RLC Limits RPD Limit Notes <br /> Batch 2060321 -EPA 5030B(PIT) <br /> LCS(2060321-BS1) Prepared &Analyzed 06/25/02 <br /> Benzene 933 050 ug/l 100 93 70-130 <br /> Toluene 9 86 050 100 99 70-130 <br /> Ethylbenzene 975 050 100 98 70-130 <br /> Xylenes(total) 299 050 300 100 70-130 <br /> Methyl tert-butyl ether 105 25 100 105 70-130 <br /> Surrogate a a a Trti luorotoluene 990 160 99 60-140 <br /> Matrix Spike(2060321-MS1) Source 5206301-05 Prepared&Analyzed 06/25/02 <br /> Benzene 9 16 050 ugll 10 0 ND 92 60-140 <br /> Toluene 973 050 100 ND 97 60-140 <br /> Ethylbenzene 960 050 100 ND 96 60-140 <br /> es(total) 297 0 50 300 ND 99 60-140 <br /> I tent-butyl ether 123 2 5 100 ND 105 60-140 <br /> Surrogate a a a-Triuorotoluene 105 100 105 60-140 <br /> Matrix Spike Dup(2060321-MSD1) Source S206301-05 Prepared&Analyzed 06/25/02 <br /> Benzene 9 70 050 ug/I 1 D 0 ND 97 60-140 6 25 <br /> Toluene 103 050 100 ND 103 60-140 6 25 <br /> Ethylbenzene 103 050 10 0 ND 103 60-140 7 25 <br /> Xylenes(total) 314 050 30 0 ND 105 60-140 6 25 <br /> Methyl tert-butyl ether 13 0 2 5 10 0 ND 112 60-140 6 25 <br /> Surrogate a a a Trifluorotoluene 108 100 108 60-140 <br /> I <br /> uoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical repoit must be reproduced en its entirety <br /> Page 4 of 5 <br />