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404 N Wi e <br /> Sequoia i Walnut Creek CA 94598 <br /> (925)988-9600 <br /> IW,,,F Analytical FAX(925)988-9673 <br /> wwww seyuolalabs coin <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite d Project Number Unocal#0187 Reported <br /> Dublm CA,94568 Project Manager Deanna L Harding 14-Mar-Ol l 0 l 9 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 801 SM/8020M - Quality Control <br /> Sequoia Analytical - Petaluma <br /> Repotting Spike Source %REC RPD <br /> Analyte Result Lttmt Umts Level Result %REC Lmuts RPD Lunt Notes <br /> Batch 1030229-EPA 5030,waters - = - <br /> Matrix Spike(1030229-MSI) Source W102669-15 Prepared&Analyzed 09-Mar-Ol <br /> Gasolme 2770 500 ug/l 2750 ND 997 65-135 <br /> Benzene 40 8 0 500 32 0 ND 127 65-135 <br /> Toluene 192 0 500 193 ND 995 65-135 <br /> Ethylbenzene 445 0 500 460 ND 967 65-135 <br /> Xylenes(total) 242 0 500 231 ND 105 65-135 <br /> Methyl teat-butyl ether 704 250 520 ND 131 65-135 <br /> Surrogate aa,a-Tri luorotoluene 288 300 960 65-135 <br /> Surrogate 4-Bromofluorobenzene 322 300 107 65-135 <br /> Matnx Spike Dup (1030229-MMM) Source W102669-15 Prepared&Analyzed 09-Mar-01 <br /> Gasoline 2740 500 ug/l 2750 ND 986 65-135 109 20 <br /> Benzene 413 0 500 320 ND- -_ 129 _ 65-135 122 20 <br /> Toluene 201 0 500 193 ND 104 65-135 458 20 <br /> Ethylbenzene _ 454 0 500 460 ND 98 7 65-135 200 20 <br /> Xylenes(total) 247 0 500 231 ND 107 65-135 204 20 <br /> Methyl tent-butyl ether 719 250 520 ND 134 65-135 211 20 <br /> Surrogate gaa-Trifluorotoluene 300 " 300 - 100 65-1_35_ <br /> Surrogate 44romafluoroben¢ene - -- 327 —— -—� - - -- .300 f —--- -107 65-135 <br /> I <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety 0, <br /> Page 31 of 32 <br />