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u <br /> 404 N Wiget Lane <br /> Sequoia Walnut Creek �4� <br /> FAX(925)988-%73 <br /> Analytical www sequO'alabs com <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron 11 9-6171 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 08-Jun-00 1718 <br /> I <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 Lu t. Units Level Result %REC Limits RPD Lunn Notes <br /> Batch OF01004-EPA 5030B [P/TJ <br /> Blank(OF01004-BLKI) Prepared&Analyzed 01-Jun-00 <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 2 5 " <br /> Surrogate qua-Tnrfluororoluene 313 300 104 70-130 <br /> LCS(OF01004-BS1) Prepared&Analyzed 01-Jun-00 <br /> Benzene 230 050 ugn 200 115 70-130 <br /> Toluene 23 3 050 20 0 116 70-130 <br /> WZ) <br /> 23 5 050 200 118 70-130 <br /> 680 050 60 0 113 70-130 <br /> Surrogate a a a-Tnfluorotoluene 181 300 937 70.130 <br /> Matrix Spike(OF01004-MSI) Source W005592-05 Prepared&Analyzed 01-Jun-00 <br /> Benzene 209 050 ug/1 200 ND 104 70-130 <br /> Toluene 212 050 200 ND 106 70-1.30 <br /> Ethylbenzene 214 050 200 ND 107 70-130 <br /> Xylenes(total) 619 050 600 ND 103 70-130 <br /> Surrogate qqa-Trrfluorotoluene 277 300 923 70-130 <br /> Matrix Spike Dup(OF01004-MSDI) Source W005592-05 Prepared&Analyzed 01-Jun-00 <br /> Benzene 216 050 ug/l 200 ND 108 70-130 329 20 <br /> Tohume 21.8 050 200 ND 109 70-130 279 20 <br /> Ethylbenzene 222 050 200 ND 111 70-130 367 20 <br /> Xylenes(total) 640 050 600 ND 107 70-130 334 20 <br /> Surrogate aaa-Trrfluorototuene 28S 300 950 70-130 <br /> Sia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Pus analytical report must be reproduced to its entirety <br /> Page 6 of 9 <br />