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Sequoia 404 W Lane <br /> Walnut Creek CAA 94598 <br /> 4 a) (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequotalabs corn <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-8632 Reported <br /> Dubhn CA,94568 Project Manager Deanna L Harding 14-Jun-01 1105 <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 Limits RPD Limit Notes <br /> Batch 1FO5004-EPA 50308 PIT <br /> LCS(IP'05004-BS4) Prepared&Analyzed 08-Jun-01 <br /> Benzene 22 1 050 ug/I 200 110 70-130 <br /> Toluene ISO 050 200 900 70-130 <br /> Ethylbenzene 186 050 200 930 70-130 <br /> Xylenes(total) 550 0 50 600 917 70-130 <br /> Surrogate aa;a-Trrfluorotoluene 294 300 98 0 70-130 <br /> LCS(IF05004-8SS) Prepared&Analyzed 12-Jun-01 <br /> Benzene 22 1 050 ug/l 200 110 70-130 <br /> Toluene 202 0 50 200 101 70-130 <br /> Ethylbenzene 194 0 50 200 970 70-130 <br /> Xylenes(total) 63 6 050 600 106 70-130 <br /> Surrogate a a,a-Tnfluoroioluene 289 300 963 70-130 <br /> Matrix Spike(I F05004-MS I) Source W105593-03 Prepared&Analyzed 07-Jun-01 <br /> Benzene 169 0 50 ug/l 20 0 ND 845 70-130 <br /> Toluene 17 6 050 20 0 ND 880 70-130 <br /> Ethylbenzene 176 050 200 ND 880 70-130 <br /> Xylenes(total) 547 0 50 600 ND 912 70-130 <br /> Surrogate a;aa-TnfluorotoIuene 283 300 943 70-130 <br /> Matrix Spike Dup(1F05004-MSDI) Source W105593-03' Prepared&Analyzed 07-Jute-01 <br /> Benzene 201 050 ug/1 200 ND 100 70-130 173 20 <br /> Toluene 18 8 050 200 ND 940 70-130 6 59 20 <br /> Ethylbenzene 19 7 050 20 0 ND 985 70-130 113 20 <br /> Xylenes(total) 580 0 50 600 ND 967 70-130 586 20 <br /> Surrogate 4 a,a-Trrfluorotoluene 307 300 102 70.130 <br /> Sequoia Analytical -Walnut Creek The results in this report apply to the samples analyzed in accordance with the ch <br /> custody document Vus analytical report must be reproduced <br /> in its en, <br /> Page 9 of 13 <br />