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404 N Wiget Lane- <br /> Sequoia Walnut Creek �4 <br /> 1 9600 <br /> FAX(925)988-9673 <br /> Analytical www seguolalabs com <br /> AQV <br /> ttler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12-Mar-Ol 07 45 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M- Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lumt Ututs Level Result %REC Lints RPD Lieut Notes <br /> Batch 1020684-EPA 5030,waters <br /> Matrix Spike Pup(1020684-MSDI) Source P102620-07 Prepared&Analyzed 27-Feb-01 <br /> Gasoline 2350 500 ug/l. 2750 ND 842 65-135 2 15 20 <br /> Benzene 35 6 0 500 32 0 ND 111 65-135 170 20 <br /> Toluene 182 0 500 193 ND 942 65-135 222 20 <br /> Ethylbenzene 45 0 0 500 460 ND 97 8 65-135 293 20 <br /> Xylenes(total) 228 0 500 231 ND 987 65-135 222 20 <br /> Methyl tert-butyl ether 181 2 50 52 0 116 125 65-135 1 11 20 <br /> Surrogate qa a-Tnfluorotolaenee 348 300 116 65-135 <br /> Surrogate 4-Bromofluorobemene 306 300 102 65-135 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br />. custody document Thus analytical report must be reproduced in its entirety <br /> Page 24 of 25 <br />