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r 819 Striker Avenue Suite 8 <br /> 1 <br /> Sequ®1a <br /> Sacramento <br /> 921959600 <br /> 4 FAX(916)921-0100 <br /> (D Analytical www sequoialabs com <br /> Gettler-Ryan-Rancho Cordova Project Tosco 6981, Stockton,CA S207245 <br /> 3140 Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Dave Vossler 08/02/02 15 03 <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 %REC Limits RPD Limit Notes <br /> Batch 2080017-EPA 5030B(PIT <br /> Laboratory Control Sample(2080017-SS1) Prepared&Analyzed 08/01/02 <br /> Benzene 109 0 50 ugll 10 0 109 70-130 <br /> Toluene 11 5 050 100 115 70-130 <br /> Ethylbenzene 11 4 0 50 100 114 70-130 <br /> Xylenes(total) 35 1 050 300 117 70-130 <br /> Methyl tert-butyl ether 11 4 2 5 too 114 70-130 <br /> Surrogate a a a Ti fluorotoluene 108 1190 108 60-140 <br /> I <br /> I <br /> Matrix Spike(2080017-MS1) Source S207335-15 Prepared&Analyzed 08/01/02 <br /> Benzene 100 0 50 ugll 100 ND 99 60 140 <br /> Toluene 11 6 050 too 1 4 102 60-140 <br /> Ethylbenzene 107 0 50 100 ND 103 60-140 <br /> es(total) 34 6 0 50 ii 30 0 3 0 105 60-140 I <br /> 1 tent-butyl ether 12 9 2 5 10 0 ND 126 60-140 <br /> Surragnte aaa-Trtfluorotoluene Id 0 10 Q 1 QO 60-140 <br /> Matrix Spike Dup(2080017-MSD]} Source 5207335-15 Prepared&Analyzed 08/01/02 <br /> Benzene 11 0 050 ug/l ]0 0 ND 109 60-140 10 25 <br /> Toluene 126 050 100 1 4 112 60-140 8 25 <br /> Ethylbenzene 116 0 50 100 ND 112 60-140 8 25 <br /> Xylenes(total) 374 050 300 3 0 115 60-140 8 25 <br /> Methyl tert-butyl ether 137 2 5 100 ND 134 60-140 6 25 <br /> Surrogate aaa-Ti¢fluorololuene 105 1019 105 60-140 <br /> uoia Analytical-Sacramento 77ie r esults in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 5 of 6 <br />