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Sequoia <br /> ee y oy a 819 Striker Avenue,Suite 8 <br /> 4 C R 1 Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX{916)921-0100 <br /> • 1�, www.sequoialabs_com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: 548,Stockton,CA Reporters: <br /> Cameron Park CA,95682 Project Manager: Steve Carter <br /> 01/18/0210:19 � <br /> l <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air (ppmv) by DHS LUFT- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result l..itnit Units Laval Result %REC Limits RPD Urnit Notes <br /> Batch 2010193-EPA 5030B (P/ <br /> Blank(2010193-BL,KI) Prepared&Analyzed: 01/11/02 <br /> Purgeable Hydrocarbons ND 2.8 ppmv ---- ---�._ <br /> Benzene ND 0.016 " <br /> Toluene ND 0.013 " <br /> Ethylbenzene ND 0.012 <br /> Xylenes(total) ND 0.012 " <br /> Methyl tert-butyl ether ND 0.14 " <br /> i <br /> Surrogate:a,a,a-Tr�fluorotoluene 0.291 0.335 86.9 60-140 <br /> 1.,CS(2010193-BSI) Prepared&Analyzed: 01/11/02 <br /> Surrogate:n,a,o-Trif2uorotoluene 0.330 ppmv 0.335 98.5 60-140 <br /> AMPS Du (2010193-BSD1) Prepared&Analyzed:01/11/02 <br /> urrogaie:a,a,a-Tr�6uorotoluene 0.281 ppmv 0.335 83.9 60-140 <br /> Cluoia 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 entirely. <br /> Page 5 of 6 <br /> I <br />