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Sequoia • 404 H Whet Lane <br /> q Walnut Geek. 9 94598 <br /> (925)985-9600 <br /> Analytical <br /> FAX w (925)988-9673 <br /> .� sequoialabs coon <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-4275 Reported <br /> Dublin CA,94568 Project Manager Deanna L Handing 04-Jan-01 06 43 <br /> TVPH/BTEX/N" by 8015BGRO/8021B- Quality Control <br /> Aspen Analytical <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %REC Lents RPD Limit Notes <br /> Batch AL02701 -EPA 5030B <br /> LCS(AL02701-BS2) Prepared 21-Dec-00 Analyzed 22-Dec-00 <br /> Benzene 201 0 500 ug/I 200 101 74112 <br /> Toluene 198 0 500 200 990 76-112 <br /> Ethylbenzene 20 1 0 500 200 101 81-118 <br /> Xylenes(total) 220 1 50 200 110 75-124 <br /> Methyl tert-butyl ether- - - -- - - 225 - 250 200 113- 55-162 - - - <br /> Surrogate qa a Trrfhrorotohtene <br /> 114 " 200 570 48-126 <br /> LCS(AL02701-BS3) Prepared 2l-Dec-00 Analyzed 22-Dec-00 <br /> Benzene <br /> 19-6 0 500—ug/l 20 0 298 0-74112 <br /> Toluene 201 0 500 200 101 76-112 <br /> Ethylbenzene 190 0 500 200 950 81-118 <br /> Xylenes(total) 230 150 200 115 75-124 <br /> Methyl tert-butyl ether 233 250 - " 200 116 55-162 _.-- <br /> Surrogate aqa-Trofluorotoluene 213 200 111^ 48-126 <br /> LCS Dup(AL02701-BSDl) Prepared&Analyzed 21-Dec-00 <br /> Gasoline - ND - 500 ug/l -- - - - 0-200 - - - - 200 <br /> Benzene 175 0 500 200 875 74-112 113 20 <br /> Toluene 175 0 500 200 875 76-112 123 20 <br /> Ethylbcnzene 165 0 500 200 825 81-118 151 20 <br /> Xylenes(total) 212 1 50 200 106 75-124 120 20 <br /> Methyl telt butyl ether 204 250 200 102 55-162 183 20 <br /> Surrogate q g o-Tnf l'uorotoluene 180 200 900 48-126 <br /> LCS Dup(AL02701-BSD2) Prepared 21-Dec-00 Analyzed 22-Dec-00 <br /> Benzene 186 0 500 ug/1 200 930 74-112 775 20 <br /> Toluene 189 0 500 200 945 76-112 465 20 <br /> Ethylbenzene 179 0 500 200 895 81-118 116 20 <br /> Xylenes(total) 22 1 150 200 111 75-124 0 454 20 <br /> Methyl tort-butyl ether 197 250 200 985 55-162 133 20 <br /> Surrogate as a-Triluororohiene 11x9 200 945 48-126 <br /> Sequoia Analytical-Walnut Creels The results in adds report apply to the samples analysed rn accordance wuth the chain <br /> custody document This anadybcal report mast be reproduced tri its'"tine <br /> Page 7 of 10 <br />