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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 (916)921-%00 <br /> 41) FAX(916)92 1 <br /> Analytical www seduaiafabs abs com coin <br /> Gettler-Ryan-Rancho Cordova Protect Former Unocal 2859,Stockton,CA 5208307 <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 /> Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2080290-EPA 5030B P <br /> Blank(2080290-BLK1) Prepared&Analyzed 08/28/02 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 970 100 97 60-140 <br /> Laboratory Control Sample(2080290-BS1) Prepared&Analyzed 08/28/02 <br /> Benzene 955 0 50 ug/l 100 96 70-130 <br /> Toluene 102 050 100 102 70-130 <br /> 0 benzene 101 0 50 too 101 70-130 <br /> es(total) 31 1 050 300 104 70-130 <br /> Methyl tert-butyl ether 110 2 5 100 110 70-130 <br /> Surrogate a a a-Trifluorotoluene 961 100 96 60-140 <br /> Matrix Spike(2080290-MSI) Source 5208338-02 Prepared&Analyzed 08/28/02 <br /> Benzene 939 0 50 ug/1 10 0 ND 94 60-140 <br /> Toluene 999 0 50 100 ND 100 60-140 <br /> Ethylbenzene 100 050 100 ND 100 60-140 <br /> Xylenes(total) 308 050 300 ND 103 60-I40 <br /> Methyl cert-butyl ether l0 6 2 5 t 0 0 ND 106 60-140 <br /> Surrogate a a a-Trifluorotoluene 969 100 97 60-140 <br /> Matrix Spike Dup(2080290-MSD1) Source 5208338-02 Prepared&Analyzed 08/28/02 <br /> Benzene 9 62 0 50 ug/l loo ND 96 60-140 2 25 <br /> Toluene 102 050 too ND 102 60-140 2 25 <br /> Ethylbenzene 100 050 100 ND 100 60-140 0 25 <br /> Xylenes(total) 31 2 050 300 ND 104 60-140 1 25 <br /> 'Methyl tert-butyl ether 110 25 100 ND 110 60-140 4 25 <br /> Surrogate a a a-Tnfluorotoluene 950 100 95 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 />