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S eqY y oia 619 Striker Avenue,Suite 8 <br /> r � l.a Sacramento.CA 95834 <br /> (916)921-9600 <br /> Analy�-y alY,tical FAX(916)921-0100 <br /> tical Y G. www.sequotalabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Dr, Ste 550 Project Number: 5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 01/08/02 15:42 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source /oREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120294-EPA 5030B(P/'1 <br /> Blank(1120294-BLKI) Prepared&Analyzed: 12/20/01 _ <br /> Purgeable Hydrocarbons ND 50 ug/1 �---""- - <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Triiluorotoluene 6.85 10.0 68.5 60-140 <br /> LCS(1120294-BS1) Prepared&Analyzed: 12/20/01 <br /> Benzene 9.68 0.50 ug/1 10.0 96.8 70-130 <br /> Toluene 9.98 0.50 10.0 99.8 70-130 <br /> hylbenzene 10.1 0.50 10.0 101 70-130 <br /> lenes(total) 28.1 0.50 30.0 93.7 70-130 <br /> Surrogate:a,a,a-Triuorotoluene 10.4 10.0 104 60-140 <br /> Matrix Spike(1120294-MSI) _ Source: S112225-01 Prepared: 12/20/01 Analyzed: 12/21/01 _ <br /> Benzene 9.10 0.50 ug/l 10.0 ND 91.0 60-140 <br /> Toluene 9.31 0.50 10.0 ND 93.1 60-140 <br /> Ethylbenzene 9.32 0.50 10A ND 93.2 60-140 <br /> Xylenes(total) 26.0 0.50 30.0 ND 86.7 60-140 <br /> Surrogate:a,a,a-Triiluorotoluene 9.68 10.0 96.8 60-140 <br /> Matrix Spike )up(1120294-MSDI) - Source: S112225-01 Prepared: 12/20/01 Analyzed: 12/21/01 <br /> Benzene 8.95 0.50 ug/l 10.0 ND 89.5 60-140 1.66 25 <br /> Toluene 9.24 0.50 10.0 ND 92.4 60-140 0.755 25 <br /> Ethylbenzene 9.29 0.50 10.0 ND 92.9 60-140 0.322 25 <br /> Xylenes(total) 25.9 0.50 30.0 ND 86.3 60-140 0.385 25 <br /> Surrogate:a,a,a-Trifluorotoluene 9.35 `^ 10.0 93.5 60-140 <br /> quoia 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 9 of 14 <br />