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819 Straker Avenue,Suatc 8 <br /> a�' (916) <br /> Sequoia Sacramento,CA 95834 <br /> 921 9600 <br /> Analytical FAX(916)921-0100 <br /> www scquoialabs corn <br /> Ielta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 30 Cameron Park Dr Ste 550 ProjectNumber Arco 6100,Tracy,CA Reported <br /> ameron Park CA,95682 Project Manager Jay Johnson 01/23/02 11 25 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %RHC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2010265-EPA 5030B McOH) <br /> Blank(2010265-BLKI) Prepared&Analyzed 01/21/02 <br /> Purgeable Hydrocarbons ND 50 mg/kg <br /> Benzene ND 0 025 " <br /> Toluene ND 0 025 " <br /> Ethylbenzene ND 0 025 " <br /> Xylenes(total) ND 0 025 " <br /> Surrogate a s a-Trafluorotoluene 0 937 100 937 60-140 <br /> LCS(2010265-BSI) Prepared&Analyzed 01/21/02 <br /> Benzene 0 959 0 025 mg/kg 1 00 95 9 70-130 <br /> Toluene 1 10 0 025 1 00 110 70-130 <br /> Ethylbenzene 1 19 0 025 l 00 119 70-130 <br /> Xylenes(total) 344 0 025 3 00 115 70-130 <br /> Orogate a a a-Triuoroluluene 101 100 101 60-140 <br /> S Du (2010265-BSDI) Prepared&Analyzed 01/21/02 <br /> Benzene 0 902 0 025 mg/kg 1 00 902 70-130 6 13 25 <br /> Toluene 1 06 0 025 1 00 106 70-130 370 25 <br /> Ethylbenzene 1 14 0 025 1 00 114 70-130 429 25 <br /> Xylenes(total) 351 0 025 300 117 70-130 201 25 <br /> Surrogate a a a-Trifluorotoluene 0 907 100 907 60-140 <br /> Batch 2010267-EPA 5030B (PIT <br /> Blank(2010267-BLKI) Prepared&Analyzed 01/2I/02 <br /> Purgeable Hydrocarbons ND 050 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate a s a-Trafluorotoluene 00169 00200 845 60-140 <br /> cola Analytical- Sacramento 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 <br /> Page Page 12 of 17 <br />