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r � <br /> 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,)9 9 <br /> 9634 <br /> 00 <br /> (916}921 9600 I <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs cam <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2186,Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 10/18/01 13 43 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT-Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1090172-EPA 5030B(P/'1') <br /> Blank(1090172-BLKI) Prepared&Analyzed 09/17/01 _ <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene NYD 0 50 ^ <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trifluoro toluene 10 5 100 105 60-140 <br /> LCS(1090172-13S1) Prepared&Analyzed 09/17/01 <br /> Benzene 11 1 0 50 ug/ 100 111 70-130 <br /> Toluene 102 0 50 100 102 70-130 <br /> Ethylbenzene 9 93 0 50 100 993 70-130 <br /> Xylenes(total) 30 6 0 50 300 102 70-130 <br /> Surrogate a a a-Trifluorotoluene 12 2 100 122 60-140 <br /> _Matrix Spike(1090172-MSI) Source S109205-01 Prepared&Analyzed 09/17/01 <br /> Benzene 106 0 50 ug/l 10 0 0 50 101 60-140 <br /> Toluene 9 89 0 50 100 ND 999 60-140 <br /> Ethylbenzene 9 42 0 50 100 ND 94 2 60-140 <br /> Xylenes(total) 28 6 0 50 300 ND 95 3 60-140 <br /> Surrogate a a a-Tnfluorololuene 101 )GO 101 60-140 <br /> _Matrix Spike Du (I090172-MSD1) Source S109205-01 Prepared 09/17/01 Analyzed_09/18101 <br /> Benzene 102 0 50 ugA 100 0 50 97 0 60-140 3 85 25 <br /> Toluene 9 43 050 100 ND 943 60-140 4 76 25 <br /> Ethylbenzene 9 30 0 50 100 ND 91 0 60-140 3 46 25 <br /> Xylenes(total) 28 7 0 50 300 ND 95 7 60-140 0 349 25 <br /> Surrogate a a a-Trifluorotoluene 10 1 100 101 60-140 <br /> Sequoia Analytical- Sacramento The iesulls in this i epoj i apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical i eport niust be reproduced in its entirety <br /> Page Page 9 of 13 <br />