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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento <br /> 92196M <br /> FAX(916)921-0100 <br /> Analytical wwwsequoialabscom <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton,CA 5209472 <br /> 3140 Gold Camp Dr,Ste 170 Protect Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Risse 10/08/02 13 11 <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 Ltnuts RPD limit Notes <br /> Batch 2100065-EPA 5030B PIT <br /> Blank(2100065-BLKI) Prepared&Analyzed 10/03/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) <br /> ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 116 100 116 60-140 <br /> Laboratory Control Sample(2100065-BS1) Prepared&Analyzed 10/03/02 <br /> Benzene 935 050 ug/l 100 94 70-130 <br /> Toluene lot 0 50 100 101 70-130 <br /> Wnzene 107 050 100 107 70-130 <br /> (total) 324 0 50 300 108 70-130 <br /> Methyl tert-butyl ether 909 25 100 91 70-130 i <br /> Surrogate a a a-Trifluorotoluene 116 100 116 60-140 <br /> Matrtx Spike(2100065-MSI) Source S209451-01 Prepared&Analyzed 10/03/02 <br /> Benzene 920 050 ug/l 100 ND 92 60-140 <br /> Toluene 9 05 0 50 100 ND 90 60-140 <br /> Ethylbenzene 917 050 100 ND 92 60-140 <br /> Xylenes(total) 28 2 0 50 300 ND 92 60-140 <br /> Methyl tert-butyl ether 999 25 100 ND 97 60-140 <br /> Surrogate a a a-Trifluorotoluene 112 100 112 60-140 <br /> Matrix Spike Dup(2100065-MSDl) Source 5209451-01 Prepared&Analyzed 10/03/02 <br /> Bene 102 0 50 ug/l 100 ND 102 60-140 10 25 <br /> Toluene 100 0 50 100 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 tert-butyl ether 11 1 2 5 too ND 108 60-140 11 25 <br /> Surrogate a a a-Tnfluorotoluene 113 100 113 60-140 <br /> oia 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 6 of 7 <br />