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Sequoia 819 Sinker Avenue Suite 4 <br /> Sacramento CA 95$34 <br /> (916)921-9600 <br /> Analytical FAX 921-0100 <br /> www sequequoialabs corn <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA S208307 <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager David Herzog 08/29/02 11 43 <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 Lomas RPD Limit Notes <br /> Batch 2080277-EPA 5030B P <br /> Blank(2080277-BLK1) Prepared&Analyzed 08/27/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-TriJluorotoluene 9 25 100 92 60-140 <br /> Laboratory Control Sample(2080277-BS1) Prepared&Analyzed 08/27/02 <br /> Benzene 9 53 0 50 ug/] 100 95 70-130 <br /> Toluene 100 0 50 100 100 70-130 <br /> 4 benzene 100 050 100 100 70-130 <br /> Kes(total) 308 050 300 103 70-130 <br /> Methyl tent-butyl ether 102 25 100 102 70-130 <br /> Surrogate aaa-Trifluorotoluene 967 100 97 60-140 <br /> Matrix Spike(2080277-MSI) Source S208305-07 Prepared&Analyzed 08/27/02 <br /> Benzene 922 0 50 ug/1 100 ND 89 60-140 <br /> Toluene 9 25 0 50 100 ND 92 60-140 <br /> Ethylbenzene 949 050 100 ND 95 60-140 <br /> Xylenes(total) 286 0 50 300 ND 95 60-140 <br /> Methyl tert-butyl ether 109 2 5 100 ND 105 60-140 <br /> Surrogate a a a-TriJluorotoluene 900 100 90 60-140 <br /> Matrix Spike Dup(2080277-MSDI) Source 5208305-07 Prepared&Analyzed 08/27/02 <br /> Benzene 9 68 050 ug/1 100 ND 94 60-140 5 25 <br /> Toluene 967 0 50 100 ND 97 60-140 4 25 <br /> Ethylbenzene 9 98 0 50 100 ND 100 60-140 5 25 <br /> Xylenes(total) 301 0 50 300 ND 100 60-140 5 25 <br /> Methyl tert-butyl ether 118 25 100 ND 114 60-140 8 25 <br /> Surrogate a a a-Trifluorotoluene 903 100 90 60-140 <br /> iia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Tlus analytical report must be reproduced in its entirety <br /> Page 5 of 7 <br />