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404 N Wiget lane <br /> • Walnut Geek,CA 94598 <br /> Sequoia (925)988-9600 <br /> FAX(925)988-%73 <br /> Analytical www sequolalabs com <br /> Gettler Ryan,hic -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Nutnber Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 14-Mar-01 10 19 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M- Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source OAREC RPD <br /> Analyte Result Luna Units Level Result %REC Llmtts RPD Limit Notes <br /> i <br /> Batch 1030227-EPA 5030,waters <br /> Matnx Spike Dnp(1030227-MSDI) Source P103187-01 Prepared&Analyzed 09-Mar-01 <br /> Gasoline 2710 500 ug/l 2750 ND 985 65-135 147 20 <br /> Benzene 387 0 500 320 ND 121 65-135 128 20 <br /> Toluene 206 0 500 193 ND 107 65-135 0 484 20 <br /> Ethylbenzene 438 0 500 " 460 ND 952 65-135 0 456 20 <br /> Xylenes(total) 273 0 500 231 ND 965 65-135 0 20 <br /> Methyl tent-butyl ether 630 250 " 520 ND 120 65-135 297 20 <br /> Surrogate aqa-Wuorotoluene 336 300 111 65-135 <br /> Surrogate 4-BmmoJluoroberaene 312 300 104 65-135 <br /> Batch 1030229-EPA 5030,waters <br /> Blank(1030229-BLKI) Prepared&Analyzed 09-Mar-01 <br /> G e ND 500 ug/l <br /> e ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 05M " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate q 4 a-Tnfluorotoluene 185 300 950 65-135 <br /> Surrogate 4 BromoJluorobenzene 300 300 100 65-135 <br /> LCS(1030229-BSI) Prepared&Analyzed 09-Mar-01 <br /> Gasoline 2590 500 ugll 2750 942 65-135 <br /> Benzene 393 0 500 320 123 65-135 <br /> Toluene 188 0 500 " 193 974 65-135 <br /> Ethylbenzene 426 0 500 " 460 926 65-135 <br /> Xylenes(total) 233 0 500 231 101 65-135 <br /> Methyl tert-butyl ether 672 250 520 129 65-135 <br /> Surrogate qqa-Trrfluorotoluene 188 300 960 65-135 <br /> Surrogate 4-Bromofluorrobenzene 311 300 104 65-135 <br /> Sla Analytical-Walnut Creek The results in this report apply to the samples analyzed on accordance with the churn of <br /> custody document Dus analytical report must be reproduced in its entirety <br /> Page 30 of 32 <br />