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819 Striker Avenue,Suite 8 <br /> /� <br /> Sacramento,CA 95834 <br /> Sequoia (916)921-9600 <br /> 1 FAX(916)921-0100 <br /> I- <br /> C Analytical vvarw.sequoialaUs.com <br /> '4 I <br /> I <br /> Delta Environmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: ARCO 6100,Tracy,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson ..11119/01 14:48 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> 1 Sequoia Analytical - Sacramento <br /> Reporting Spike Soured %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1110103-BPA 5030E(P/T) <br /> Blank(1110103-BLKI) Prepared&Analyzed: 11/08/01 _ <br /> Purgeable Hydrocarbons ND 50 ug/1 1 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 " <br /> Ethylbenzene SID 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Tris luorotoluene 9.83 10.0 98.3 60-140 <br /> LCS(1110103-BS1)_ Prepared&Analyzed: 11/08/01 <br /> Benzene 9.40 0.50 ug/l 10.0 94,0 70-130 <br /> Toluene 9.17 0.50 10.0 91.7 70-130 <br /> Ethylbenzene 9.25 0.50 10.0 92.5 70-130 <br /> enes(total) 27.8 0.50 30.0 92.7 70-130 <br /> rrogate:a,a,a-TrIuorotoluene 10.1 10.0 101 60-140 <br /> I <br /> Matrix Spike(111.01_03-MSI) Source:5111111-01 Prepared&Analyzed: 11/08/01 <br /> Benzene 9.77 0.50 ug/1 10.0 ND 97.7 60-140 i <br /> Toluene 9.76 0.50 10.0 ND 97,6 60-140 <br /> Ethylbenzene 9.68 0.50 10.0 ND 96.8 60-140 <br /> Xylenes(total) -__ 29.0 0.50 30.0 ND 96.7 60-140 <br /> Surrogate:a,a,a-Triiluorotoluene 9.51 10.0 95.1 60-140 <br /> _Matrix Spike Dup(1110103-MSDI) Source: S111111-01 Prepared&Analyzed: 11/08/01 <br /> Benzene 10.2 0.50 ug/1 10.0 ND 102 60-140 4,31 25 <br /> Toluene 10.2 0.50 10.0 ND 102 60-1.40 4.41 25 <br /> Ethylbenzene 10.1 0.50 10.0" ND 101 60-140 4,25 25 <br /> Xylenes(total) 30.2 0.50 30.0 ND 101 60-140 4.05 25 <br /> Surrogate:a,a,a-Trifluorotoluene 9.69 10.0 96.9 60-140 T� <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 /> J <br /> 4 <br /> } <br /> ! Page 5 of 7 <br />