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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> Analytical 4 FAX(925) 73 <br /> www sequoialabs alabs c cam <br /> Gettler Ryan,Inc -Dublin Protect Chevron <br /> 6747 Sierra Count Suite J Project Number Chevron#9-1848 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 13-Jun-0l 20 06 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Linuts RPD Limit Notes <br /> Batch 1E30003-EPA 5030B PIT <br /> LCS(IE30003-BS2) Prepared&Analyzed 01-Jun-01 <br /> Benzene 225 050 ugA 200 11.2 70-130 <br /> Toluene 186 050 200 930 70-130 <br /> Ethylbenzene 180 050 200 900 70-130 <br /> Xylenes(total) 578 050 600 963 70-130 <br /> Surrogate a a,a-Trifluorotoluene 287 300 95 7 70-130 <br /> LCS 1E30003-BS3) Prepared&Analyzed 02-Jun-01 <br /> Benzene 232 050 uSA 200 116 70-130 <br /> Toluene 189 050 200 945 70-130 <br /> Ethylbenzene 196 050 200 980 70-130 <br /> Xylenes(total) 582 050 600 970 70-130 <br /> are a a a-Trifluorotoluene 290 300 967 70-130 <br /> Matnx Spike(1E30003-MSI) Source W105545-07 Prepared&Analyzed 01-Jun-01 <br /> Benzene -J 204 050 ug/1 200 ND 102 70-130 <br /> Toluene 187 050 200 ND 935 70-130 <br /> Ethylbenzene 190 050 200 ND 950 70-130 <br /> Xylenes(total) 570 050 600 ND 950 70-130 <br /> Surrogate a aa-Tnfluororoluene 284 300 947 70-130 <br /> Matrix Spike Dup(IE30003-MSDI) Source W105545-07 Prepared&Analyzed 01-Jun-01 <br /> Benzene 185 050 ugll 200 ND 925 70-130 977 20 <br /> Toluene 176 050 200 ND 880 70-130 606 20 <br /> Ethylbenzene 166 050 200 ND 830 70-130 135 20 <br /> Xylenes(total) 556 050 600 ND 927 70-130 249 20 <br /> Surrogate a a a-Tnfluorotoluene 288 300 960 70-130 <br /> Ola 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 /> Page 6 of 8 <br />