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' 404 N W Set Lane <br /> Walnut Creek,CA 94598 <br /> Sequoia (925)988-9600 <br /> FAX(925)%8-%73 <br /> Analytical www sequoialabs`°m <br /> Gettler Ryan,Inc -Dubh n Project Chevron <br /> 6747 Sierra Court Saute J Project Number Chevron#9-9840 Reported <br /> Dubhn CA,94568 Project Manager Deanna L Harduig 10-Jan-0l 08 10 <br /> TVPUMTEX/N" by 8015BGRO/8021B - Quality Control <br /> Aspen Analytical <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Ltmit Units Level Result °/aREC Luras RPD Lunt Notes <br /> Batch AL)2801 -EPA 5030B <br /> Matrix Spike(AL02801-MS2) Source A012114-04 Prepared 27-Dec-00 Analyzed 28-Dec-00 <br /> Gasoline ND 500 ugll ND 0-200 <br /> Benzene 201 0 500 " 200 ND 101 57-123 <br /> Toluene 172 0 500 200 ND 960 63-115 <br /> &hylbenzene 16 8 0 500 200 ND 840 64-117 <br /> Xylenes(total) 196 150 200 ND 980 55-132 <br /> Mdhyl test butyl ether 32 9 250 200 ND 165 21-169 <br /> Surrogate AAa-Tnfluorololuene 1&8 200 940 48-126 <br /> Matnx Spike Dnp(AL)2801-MSD1) Source W012402-01 Prepared&Analyzed 27-Dec-00 <br /> Gasoline ND 500 ug/l ND 0-200 200 <br /> Benzene 203 0 500 200 ND 101 57-123 291 31 <br /> Tou ^e 207 0 500 200 ND 104 63-115 394 26 <br /> ane 19 4 0 500 11 200 ND 970 64-117 0 514 26 <br /> Xylenes O-W) 220 1 50 200 ND 110 55-132 1 80 31 <br /> Methyl tort-butyl ether 225 250 200 ND 113 21-169 690 54 <br /> Surrogate a,a,a-Tnfluorotoluene 236 200 118 48-116 <br /> Matra Spike Dup(AL02801-MSD2) Source A012114-04 Prepared 27-Dec-00 Analyzed 28-Dec-00 <br /> Gasoline ND 50 0 ug/1 ND 0-200 200 <br /> Benzene 159 0 500 200 ND 795 57-123 23 3 31 <br /> Toluene 156 0 500 200 ND 780 63-10 976 26 <br /> Ethylbenzene 147 0 500 200 ND 735 64-117 13 3 26 <br /> Xylenes(total) 180 150 " 200 ND 900 55-132 851 31 <br /> Methyl tart-butyl ether 213 2 50 200 ND 106 21-169 428 54 <br /> Surrogate 4 4 o-Tri luorotoluene 155 200 775 48-126 <br /> Batch AL02901 -EPA 5030B <br /> Blank(AL02901-BLKI) Prepared&Analyzed 27-Dec-00 <br /> Gasoline ND 500 ug/1 <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 1 50 " <br /> Methyl tett-butyl ether ND 2 50 " <br /> 1a Analytical-Walnut Creels The results in his report apply to the samples analyzed in aceordmute with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 13 <br />