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`,�a'��a�' 885 Jarvis Dr <br /> ( , , Sequoia Morgan Hill,CA 95037 <br /> ///���///mmmm!!! (408)776-9670 <br /> 1W Analytical FAX(408)782-6308 <br /> www.s:quoialabs.can <br /> URS Corporation I❑ Project: ARCO#434 NMJ0673 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#434 Reported: <br /> Sacramento CA,95833 Project Manager: Vern Elartb 11/12/02 10:24 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEX by EPA 8021B - Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source a/uREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2J28013-EPA 5030B lPrrl <br /> Blank(2J28013-BLKI) Prepared&Analyzed: 10/28/02 <br /> Gasoline Range Organics(C6-C I O) NO 0.50 mg/kg <br /> Benzene NO 0.0050 <br /> Toluene ND 0.0050 <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) NO 0.010 " <br /> Surrogate:a.a,a-Tris luorotoluene 0.0186 0.0200 93.0 64-145 <br /> Labontory Control Sample(2J28013-BSI) Prepared&Analyzed: 10/28/02 <br /> Gasoline Range Organics(C6-CIO) 1.00 0.50 mg/kg 1.00 100 63-143 <br /> Surrogate:a,a,a-Tris luorotoluene 0.0141 " 0.0200 120 64-145 <br /> Matrix Spike(2J28013-MSI) Source:N LJ0673-10 Prepared&Analyzed: 10/28/02 <br /> Gasoline Range Organics(C6-CI0) 0.689 0.50 mg/kg 1.10 ND 62.6 63-143 QM-07 <br /> Benzene 0.0228 0.0050 " 0.0132 ND 173 72-135 QM-07 <br /> Toluene 0.105 0.0050 0.0794 ND 132 67-141 <br /> Ethylbenzene 0.0236 0.0050 0.0184 NO 128 68-147 <br /> Xylenes(total) 0.125 0.010 0.0922 NO 136 62-149 <br /> Surrogate:a,a.a-TrifJuorotoluene 0.0229 0.0200 114 64-145 <br /> Matrix Spike Dup(2J28013-MSD1) Source:MLJ0673-10 Prepared&Analyzed: 10/28/02 <br /> Gasoline Range Organics(C6-C10) 0.836 0.50 mg/kg 1.10 ND 76.0 63-143 19.3 21 <br /> Benzene 0.0222 0.0050 0.0132 ND 168 72-135 2.67 35 QM-07 <br /> Toluene 0.0986 0.0050 0.0794 NO 124 67-141 6.29 18 <br /> Ethylbenzene 0.0222 0.0050 0.0184 NO 121 68-147 6.11 20 <br /> Xylenes(total) 0.123 0.010 0.0922 NO 133 62-149 1.61 20 <br /> Surrogate:a,a,a-Tris luorotoluene 0.0238 0.0200 119 64-145 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analysed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> 11 of 16 <br />