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404 N W18et Lane <br /> Sequoia Walnut Creek,CA <br /> 94598 <br /> -%W <br /> (925)988-960p <br /> FAX(925)988-%73 <br /> Analytical u°'a' <br /> Gettler Ryan,lnc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 14-Mar-Ol 10 19 <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 Limit Units Level Result °/nREC Lunits RPD Lunn Notes <br /> Batch 1030227-EPA 5030,waters - <br /> Blank(1030227-BLK1) Prepared&Analyzed 09-Mar-01 <br /> Gasoline ND 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl telt-butyl ether ND 250 — — — - <br /> Surrogate q a a-Trifluorotoluene 287 300 957 65-135 <br /> Surrogate 4 BromoJluorobenzene 288 300 960 65-135 <br /> LCS(1030227-BSI) Prepared&Analyzed 09-Mar-01 <br /> Gasoline 2610 500 ug/l 2750 949 65-135 <br /> Benzene 383 0 500 320 120 65-135 <br /> -Toluene- - - -- -- — 201-- - - 0500- - ---- 193 -- --- 104-- -65-135 - - - - - <br /> Ethylbenzene 426 0 500 460 926 65-135 <br /> Xylenes(total) 217 0 500 231 939 65-135 <br /> Methyl tert-butyl ether 635 250 520 122 65-135 <br /> Surrogate q q a-Tnfluorotohrew - ___ T 331 300 _ -111 -65-135_ <br /> Surrogate 4 Bromofluorobemene 311 300 104 65-135 <br /> Matnx Spike(1030227-MSI) - Source P1U3187-0l Prepared&Anilyzed_09-Mar-01W- - <br /> Gasoline 2750 50_0 ug/l 2750 ND 100 _65-135 <br /> Benzene 392 0 500 " 320 ND 123 65-135 <br /> Toluene 207 0 500 193 ND 107 65-135 <br /> Ethylbenzene 440 0 500 460 ND 957 65-135 <br /> Xylenes(total) 223 0 500 231 ND 965 65-135 <br /> Methyl tent-butyl ether 649 2 50 520 ND 123 65-135 <br /> Surrogate q q a-T>711uorotoluene 336 300 111 65-135 <br /> Surrogate 4-BromoJluoroberaeree 316 " 300 105 65-135 <br /> Sequoia Analytical -Walnut Creek The results to this report apply to the samples analysed in accordance with the chain o <br /> custody document This analytical report must be reproduced to its enar * <br /> Page 29 of 32 <br />