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l <br /> 404 N Wiget Lane <br /> 1• Walnut Creek CA 94598 <br /> Sequoia (925)988-9600 <br /> FAX(925)988-%73 <br /> Analytical www sequoialabs com <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-8632 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 16-Aug-01 08 08 <br /> Total Purgeable Hydrocarbons (C&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 Nates <br /> Batch 1H01003-EPA 5030B PIT <br /> LCS(11-101003-13SI) Prepared&Analyzed 01-Aug-01 <br /> Benzene 214 050 ug/1 200 107 70-130 <br /> Toluene 179 050 200 895 70-130 <br /> Ethyl benzene 175 050 200 87 5 70-130 <br /> Xylenes(total) 572 050 600 953 70-130 <br /> Surrogate a a a-Trifluorotolue w 307 300 102 70-130 <br /> LCS(1H07003-BS2) Prepared&Analyzed 07-Aug-01 <br /> Benzene 210 050 ug/1 200 105 70-130 <br /> Toluene 180 050 200 900 70-130 <br /> Ethylbcamne 180 050 200 900 70-130 <br /> Xylenes(total) 559 050 600 932 70-130 <br /> idlik <br /> ale a,a,a-Trifluorotoluene 277 300 913 70-130 <br /> LCS(IH01003-BS3) Prepared&Analyzed 08-Aug-01 <br /> Benzene 201 050 ug/1 200 100 70-130 <br /> Toluene 189 050 200 945 70-130 <br /> Ethylbenzene 19 6 050 200 980 70-130 <br /> Xylenes(total) 582 050 600 970 70-130 <br /> Surrogate aa a-Triuorotoluene 181 300 93 7 70-130 <br /> LCS(1H01003-BS4) Prepared&Analyzed 09-Aug-01 <br /> Benzene 205 050 ug/1 200 102 70-130 <br /> Toluene 172 050 200 860 70-130 <br /> Ethylbenzene 178 0 50 200 $90 70-130 <br /> Xylenes(total) 53 8 050 600 89 7 70-130 <br /> Surrogate a a a-Trfuorotoluene 279 300 930 70-130 <br /> LCS Dup(11-101003-13SD1) Prepared&Analyzed 01-Aug-01 <br /> Benzene 243 0 50 ug/l 200 122 70-130 12 7 20 <br /> Toluene 189 0 50 200 945 70-130 543 20 <br /> Ethylbenzene 19 7 050 200 98 5 70-130 11 8 20 <br /> Xylenes(total) 581 050 600 968 70-130 1 56 20 <br /> Surrogate aaa-7 ri luorololuene 314 300 105 70-130 <br /> Adolk oia Analytical - Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Pus analytical report must be reproduced in its entirety <br /> Page 8 of 14 <br /> I <br />