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819 Striker Avenue Suite 8 <br /> 1 Sacramento CA 95834 <br /> Sequoia (916)921-9600 <br /> 4 FAX(916)921 0100 <br /> (D Analytical www sequoialabs corn <br /> rF <br /> Gettler-Ryan-Rancho Cordova Project Former Tosco 6981,Stockton,CA <br /> 3140 Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Pio)ect Manager Dave Vossler 05/31/02 13 43 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike source %REC RPD <br /> Maly e Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2050268-EPA 5030B (PIT) <br /> Blank(2050268-BLKI) Prepared&Anaiyzed 05/23/02 <br /> Purgeable hydrocarbons ND 50 ugA i <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 <br /> Sut rogate a a a-Trti luorotoluene 106 100 106 60-140 <br /> LCS(2050268-BSI) Prepared&Analyzed 05/23/02 <br /> Benzene 113 050 ugll 100 113 70-130 <br /> Toluene 114 0 50 100 114 70-130 <br /> Venbenzene 114 050 10 0 114 70-130 <br /> es(total) 349 050 300 116 70-130 <br /> Methyl tert-butyl ether 112 2 5 100 112 70-130 <br /> Surrogate a a a-Trifluorotoluene 11 1 100 111 60-140 <br /> Matrix Spike(2050268-MSI) Source 5205258-01 Prepared&Analyzed 05/23/02 <br /> Benzene 103 050 ug/1 100 ND 101 60-140 <br /> i <br /> Toluene 10 3 050 100 ND 103 60-140 <br /> Ethylbenzene 105 050 100 ND 105 60-140 <br /> Xylenes(total) 323 050 30 0 ND 108 60-140 <br /> Methyl tert-butyl ether 112 25 100 ND 109 60-140 <br /> Surrogate a a a-Triuorotoluene 103 100 103 60-140 <br /> Matrix Spike Dup(2050268-MSDI) Source S205258-01 Prepared&Analyzed 05/23/02 <br /> Benzene 112 0 50 ug/l 100 ND 110 60-140 S 25 <br /> Toluene 110 050 100 ND 110 60-140 7 25 <br /> Ethylbenzene 109 050 100 ND 109 60-140 4 25 <br /> I <br /> Xylenes(total) 340 050 300 ND 113 60-140 5 25 <br /> Methyl tert-butyl ether <br /> 12 3 2 5 100 ND 120 60-140 9 25 <br /> Sur rogate a a a-Trilluorotoluene 995 100 100 60-140 <br /> quoia Analytical- Sacramento The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be rept oduced in its entirety <br /> Page 3 of 4 <br />