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819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento, 95834 <br /> 9!D (s16})9zl-9600shoo <br /> IwAnalytical FAX(916)921-0100 <br /> www sequoialabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2186,Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 2186,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 12/27/01 15 45 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT- Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analytc Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120226-EPA 5030B(PIT) <br /> Blank(1120226-BLKI) Prepared&Analyzed 12/17/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene PID 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate a s a-Trifluorotoluene 9 63 100 963 60-140 <br /> LCS(1120226-BSI) Prepared&Analyzed 12/17/01 <br /> Benzene 9 61 0 50 ug/l 10 0 96 1 70 I30 T <br /> Toluene 9 30 0 50 10 0 93 0 70 130 <br /> Ethylbenzene 9 37 050 10 0 93 7 70 130 <br /> Xylenes(total) 28 1 0 50 30 0 93 7 70 130 <br /> Surrogate a s a-Trifluoro toluene 988 100 988 60-140 <br />• Batch 1120235-EPA 5030E(PIT) <br /> Blank(1120235-BLK1) Prepared&Analyzed 12/17/01 <br /> Purgeable Hydrocarbons ND 50 ugll _ <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate a s a-Trifluorotoluene 9 77 10 0 977 60-140 <br /> LCS(1120235-BS1) _ _ Prepared&Analyzed 12/17/01 <br /> Benzene 105 050 ug/l 10 0 105 70-130 <br /> Toluene 9 36 050 10 0 93 6 70-130 <br /> Etbylbenzene 8 16 050 10 0 81 6 70-130 <br /> Xylenes(total) 25 5 050 30 0 85 0 70-130 <br /> Surrogate a a a-Trifluoro toluene 105 10 0 105 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> isof custody document This analytical report must be reproduced in its entirety <br /> Page Page 9 of 13 <br />