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Suit <br /> Sequoia 619 Stoker Avenue 958 4 <br /> Sacramento CA 95634 <br /> 4 FAX 4D (916)921-9600 <br /> 4 {9161 alabs921 co00 <br /> Analytical <br /> www sequollabs crn <br /> 4 <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton, CA S210535 <br /> 3140 Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Risse 11/12/02 16 29 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPU <br /> Analyte Result Limit Units Leve] Result %REC Limits RPD Limit Notes <br /> Batch 2100387-EPA 5030B P <br /> Laboratory Control Sample(2100387-BSI) Prepared&Analyzed 10/25/02 <br /> Benzene 11 1 050 ug/I 100 111 70-130 <br /> Toluene 109 050 100 108 70-130 <br /> Ethylbenzene 100 050 100 100 70-130 <br /> Xylenes(total) 325 050 300 108 70-130 <br /> Methyl tert-butyl ether 109 25 100 109 70-130 <br /> Surrogate a a a-Tri luorotoluene 108 100 108 60-140 <br /> Laboratory Control Sample(2100387-BS2) Prepared&Analyzed 10/28/02 <br /> Benzene 10 9 050 ug/I 10 0 109 70-130 <br /> Toluene 11 0 050 10 0 110 70-130 <br /> Ethylbenzene 921 050 10 0 92 70-130 <br /> WYes <br /> (total) 328 050 300 109 70-130 <br /> J <br /> tert-butyl ether 4 47 25 100 45 70-130 Q-28 <br /> Surrogate a a a-Trifluorotoluene 9 70 100 97 60-140 <br /> Laboratory Control Sample(2100387-BS3) Prepared&Analyzed 10/29/02 <br /> Benzene 103 050 ug11 100 103 70-130 <br /> Toluene 101 0 50 100 101 70-130 <br /> Ethylbenzene 102 0 50 100 102 70-130 <br /> Xylenes(total) 31 1 050 300 104 70-130 <br /> Methyl tert-butyl ether 11 1 25 100 111 70-130 <br /> Surrogate a a a-Trifluorotoluene 104 100 104 60-140 <br /> Laboratory Control Sample(2100387-BS4) Prepared&Analyzed 10/30/02 <br /> Benzene 100 050 ug/I too 100 70-130 <br /> Toluene 104 050 loo 104 70-130 <br /> Ethylbenzene 9 93 050 too 99 70-130 <br /> Xylenes(total) 300 0 50 300 100 70-130 <br /> Methyl tert-butyl ether 997 2 5 too 100 70-130 <br /> Surrogate a a a-Trifluorotoluene 9 83 100 98 60-140 <br /> nota Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> ,per Page 7 of 11 <br />