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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 ID (916)921-9600 <br /> FAX(916)92 1 alabs c 00 <br /> NO Analytical <br /> www sequotlabs om <br /> is <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA S209471 <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Risse 10/08/02 12 21 <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 Limas RPD Lima Notes <br /> Batch 2100065-PPA 5030B P <br /> Blank(2100065-BLKI) Prepared&Analyzed 10/03/02 <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-Tr:fluorotoluene 116 IOU 116 60-140 <br /> Laboratory Control Sample(2100065-BSI) Prepared&Analyzed 10/03/02 <br /> Benzene 935 0 50 ug/l 100 94 70-130 <br /> Toluene 101 050 100 101 70-130 <br /> 4 benzene 107 050 100 107 70-130 <br /> i <br /> Ones(total) 32 4 0 50 300 108 70-130 <br /> Methyl tert-butyl ether 909 25 100 91 70-130 <br /> Surrogate a a a-Trij<luorotoluene 116 IOU 116 60-140 <br /> Matrix Spike(2100065-MSI) Source S209451-01 Prepared&Analyzed 10/03/02 <br /> Benzene 920 050 ug/l 100 ND 92 60-140 <br /> Toluene 905 050 10 0 ND 90 60-140 <br /> Ethylbenzene 917 0 50 100 ND 92 60-140 <br /> Xylenes(total) 282 0 50 300 ND 92 60-140 <br /> Methyl tent-butyl ether 9 99 2 5 too ND 97 60-140 <br /> Surrogate a a a-Trtfluorotoluene 112 100 112 60-140 <br /> Matrix Spike Dup(2100065-MSD1) Source 5209451-01 Prepared&Analyzed 10/03/02 <br /> Benzene 102 050 ug/l 100 ND 102 60-140 10 25 <br /> Toluene loo 050 100 ND 100 60-140 10 25 <br /> Ethylbenzene 101 050 100 ND 101 60-140 10 25 <br /> Xylenes(total) 31 1 050 300 ND 102 60-140 10 25 <br /> Methyl Cert-butyl ether 11 1 25 100 ND 108 60-140 11 25 <br /> Surrogate a a a-Tr fluorotoluene 113 100 113 60-140 <br /> Ola 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 /> Page 5 of 6 <br />