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:s <br /> 819 Striker Avenue,Suite 8 <br /> SequoSequoia Sacramento. 95834 <br /> ia (9]6)92 921-9600 <br /> FAX(916)921-0100 <br /> Analytical <br /> www.sequotalabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: N/A Reported: <br /> Cameron Park CA, 95682 Project Manager: Jay Johnson 09/18/01 11:39 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air by DHS LUFT - QuaIity Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike SOW= °/OREC RPD <br /> Analyte Result Limit Units Level Result °/oREC Limits RPD Limit Notes <br /> Batch 1090028-EPA 5030B (PIT) <br /> Blank(1090028-BLKI) Prepared&Analyzed: 09/05/01 --_ <br /> Purgeable HydrocarbonsND 10 mglm'Air <br /> Benzene ND 0.050 " <br /> Toluene ND 0.050 " <br /> Ethylbenzene ND 0.050 " <br /> Xylenes(total) ND 0.050 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-Tris luorotoluene 1.13 2.00 106 60-140 <br /> LCS(1090028-BS1) Prepared&Analyzed:09/05/01 <br /> Benzene 1.97 0.050 mg/ml Air 2.00 98.5 70-130 <br /> eLiene 1.94 0.050 „ 2.00 97.0 70-130 <br /> ylbenzene 1.94 0.050 2.00 97.0 70-130 <br /> Xylenes(total) 5.46 0.050 6.00 91.0 70-130 <br /> Methyi tert-butyl ether 1.87 0.50 2.00 93.5 70-130 <br /> Surrogate:a,a,a-7'rii luorololuene - 2.28 2.00 114 60-140 <br /> LCS Dup (10_90028-BSD1) Prepared&Analyzed:09/05/01 <br /> Benzene 2.04 0.050 mg/m'Air 2.00 102 70-130 3.49 25 <br /> Toluene 2.00 0.050 .2.00 100 70-130. 3.05 25 <br /> Ethylbenzene 2.00 0.050 2.00 100 70-130 3.05 25 <br /> Xyienes(total) 5.66 0.050 6.00 94.3 70-130 3.60 25 <br /> Methyl tert-buryl ether 1.94 0.50 2,00 97.0 70-130 3.67 25 <br /> Surrogate:a,a,a-Trifluorotoluene T 2.13 -� 2.00 106 . 60-140 <br /> Batch 1090087-EPA 5030B(PIT) <br /> Blank(1090087-BLKI) Prepared&Analyzed:09/07/01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 0.050 <br /> Toluene ND 0,050 " <br /> Ethylbenzene ND 0.050 " <br /> Xylenes(total) ND 0.050 " <br /> Methyl tent-butyl ether ND 0.50 " <br /> Surrogate`a,a,a-Tris luorotoluene 2.25 2.00 112 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 /> Page 4 of 9 <br />