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i <br /> Sequoia $19 Striker Avenue,Suite 8 <br /> L. Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(91(5)90 <br /> i ri wv+^n'.seq uoialabs.coahs.com <br /> 0 <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr,Ste 550 Project Number: 548,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 02/1410214:43 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPA <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2020054-EPA 5030B (PIT) J <br /> Blank(2020054-BLKI) Prepared&Analyzed:02/05/02 <br /> Purgeable Hydrocarbons ND 10 mg/m'Air <br /> Benzene ND 0.050 " <br /> Toluene ND 0.10 " <br /> Ethylbenzene ND 0.050 " <br /> Xylenes(total) ND 0.050 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,qa-Trli luorotoluene 2.06 2.00 103 60-140 <br /> LCS(2020054-BS1) Prepared&Analyzed: 02/05/02 <br /> Benzene 1.79 0.050 mglrn'Air 2.00 89.5 70-130 <br /> "enesuene 1.98 0:050 2.00 99.0 70-130 ' <br /> ylbenzene 2.13 0.050 2.00 106 70-130 <br /> (total) 6.18 0.050 6.00 103 70-130 <br /> Methyl tert-butyl ether 2.13 0.50 2.00 106 70-130 <br /> Surrogate:a,a,a-Trlfluorotoluene 2.20 2.00 110 60-140 <br /> LCS Dup(2020054-BSDI) Prepared&Analyzed:02/05/02 <br /> Benzene 1.77 0.050 mg/m'Air 2.00 88.5 70-130 1.12 25 <br /> Toluene 1.96 0.050 2.00 98.0 70-130 1.02 25 <br /> Ethylbenzene 2.09 0,050 2.00 104 70-130 1.90 25 <br /> Xylenes(total) 6.11 0.050 6.00 102 70-130 1.14 25 <br /> Methyl tert-butyl ether 2.11 0.50 2.00 106 70-130 0.943 25 <br /> Surrogate:a,a,a-Triiluorotoluene 1.21 2.00 110 60-140 <br /> equoia 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 /> h <br /> Page 4 of 6 <br />