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Sequoiay 404 NWiget lane <br /> Walnut Creels CA 94598 <br /> 4 (925)988-9600 <br /> a- ) <br /> Analytical FAX equ 988-9673 <br /> www squolalabs corn <br /> Gettler Ryan Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron 4 9-8264 Reported <br /> Dublin CA 94568 Project Manager Deanna L Harding 06-Aug-01 09 54 <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—%RFC—Lim its—RPD—Limit—Notes— <br /> Batch 1626002 - EPA 5030B P/TTT <br /> 1,CS(1626002-BS2) Prepared& Analyzed 29-Jul-01 <br /> Benzene --' T ---- �18 7 --- 050 ug/I 200 93 5 70-130 - <br /> Toluene - - - - - - ' 189 - 050 200 94 5 70-130 - <br /> Ethylbenzene 201 050 200 100 70-130 <br /> Xylenes(total) 603 050 600 100 70-130 <br /> Surrogate a a a-Triuorotoluene 308 300 103 70-130 <br /> LCS(IG26002-BS3) Prepared&Analyzed 30-auk-01 <br /> Benzene 201 050 ug/I 200 �T 100 70-130 <br /> Toluene 21 3 050 200 106 70-130 <br /> Ethylbenzene 222 050 200 111 70-130 <br /> Xylenes(total) 662 050 600 Ito 70-130 <br /> Surrogate a a a-Trr�uorotoluene 299 300 997 76-130 <br /> Matrix Spike(IG26002-MSI) Source W107360-03 Prepared&Analyzed 26-Jul-01 <br /> Benzene <br /> 172 050 ug/l 200 ND 86 0 70-130 <br /> Toluene 183 050 200 ND 91 5 70-130 <br /> Ethylbenzene 188 050 200 ND 94 0 70-130 <br />-- Xylenes(total)- -- ---- 562— 050 --600----ND—=93-7=--70-130- _- _--_ - -- <br /> Surrogate aaa-Trifluorotoluene 306 300 102 70-130 <br /> Matrix Spike Dup(1626002-MSDI) - Source W107360-03 Prepared&Analyzed 26-Jul-01 <br /> - Benzene - - - -- --- 182 - -0 50-- -ug/I-- ---20 0 - - -ND =91 0 - 70-130 565 =20 - <br /> Toluene 192 050 200 ND 960 70-130 480 20 <br /> Ethylbenzene 194 050 200 ND 970 70-130 3 14 20 <br /> Xylenes(total) 582 050 600 ND 97 0 70-130 350 20 <br /> Surrogate a a a-Tr>7uorotoluene � 312 300 104 70-130 <br /> Sequoia 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 entire* <br /> Page 12 of 24 <br />