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404 N Wiget Lane <br /> Walnut Geek CA 94598 <br /> Sequoia 19257 988-9600 <br /> 4 <br /> iD FAX(925)988-9673 <br /> ! lalabs <br /> Analytical 'vww seq �m <br /> 0Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron g 9-1848 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 09-Mar-Ol 10 25 <br /> Total Purgeable Hydrocarbons (C&C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Lunit Umts Level Result %REC Limits RPD Limit Notes <br /> Batch 1C04003 -EPA 5030B IP/T] <br /> Blank(IC04003-BLKI) Prepared&Analyzed 03-Mar-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <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 /> Surrogate qqa-Trrfluorotoluene 319 300 106 70-130 <br /> LCS(lC04003-BSI) Prepared&Analyzed 03-Mar-01 <br /> Benzene 187 050 ug/l 200 93 5 70-130 <br /> Toluene 195 050 200 975 70-130 <br /> Ethylbenzene 202 050 200 101 70-130 <br /> •�(mow) 606 1050 60 0 101 70-130 <br /> Surrogate MAO-Trrfluoromhrene 314 300 105 70.130 <br /> Matrix Spike(lC04003-MS1) Source W103066-02 Prepared&Analyzed 03-Mar-01 <br /> Benzene 178 050 ug/I 200 ND 89 0 70-130 <br /> Toluene 19 0 050 200 ND 95 0 70-130 <br /> Ethylbenzene 197 050 200 ND 985 70-130 <br /> Xylenes(total) 60 2 050 600 ND 100 70-130 <br /> Surrogate a 4za-Tntfluorotoluene 294 300 980 70.130 <br /> Matrix Spike Dup(1C04003-MSD1) Source W103066-02 Prepared&Analyzed 03-Mar-01 <br /> Benzene 197 050 ug/l 200 ND 935 70-130 493 20 <br /> Toluene 19 9 050 200 ND 995 70-130 463 20 <br /> Ethylbenzene 206 050 200 ND 103 70-130 447 20 <br /> Xylenes(total) 617 050 600 ND 103 70-130 246 20 <br /> Surrogate czaa-Trrfluorotolaene 314 300 105 70-130 <br /> S uola Analytical-Walnut Creek 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 /> I <br /> Page 4 of 6 <br />