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' Se885 Jarvis Dr <br /> ' SequoiaMorganHil,CA95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.sequoialabs.00 n <br /> 4rCorporation[1] Project: ARCO#548,Stockton,Ca MLL0882 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO 9548,Stockton,CA ReportecE: <br /> acCA,95833 Project Manager: Vern Elarth 01/10/03 15:47 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE in Air by DHS LUFT- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Lllytl�- <br /> Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3010119-EPA 5030B PIT <br /> Blank(3010119-BLK1) Prepared&Analyzed:01/07/03 <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 tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 1.96 2.00 98 60-140 <br /> Blank(3010119-BLK2) Prepared&Analyzed:01/08/03 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 0.050 " <br /> Toluene ND 0.050 " <br /> * nzene ND 0.050 <br /> Yzelbnees(total) ND 0.050 " <br /> Methyl ter(-butyl ether ND 0.50 " <br /> Surrogate;a,a,a-Trtguorotoluene 1.90 2.00 95 60-140 <br /> Laboratory Control Sample(3010119-BSI) Prepared&Analyzed:01/07/03 <br /> Benzene 1.87 0.050 mgltW Air 2.00 94 70-130 <br /> Toluene 1.96 0.050 2.00 98 70-130 <br /> Ethylbenzene 1.92 0.050 2.00 96 70-130 <br /> Xylenes(total) 5.70 0.050 6.00 95 70-130 <br /> Methyl tert-butyl ether 1.83 0.50 2.00 92 70-130 <br /> Surrogate:a,a,a-Trifluorololuene 2.11 2.00 106 60-140 <br /> Laboratory Control Sample(3010119-BS2) Prepared&Analyzed:01/08/03 <br /> Benzene 1.97 0.050 mg/ml Air 2.00 98 70-130 <br /> Toluene 2.02 0.050 2.00 101 70-130 <br /> Ethylbenzene 1.95 0.050 2.00 98 70-130 <br /> Xylenes(total) 5.79 0.050 6.00 96 70-130 <br /> Methyl tert-butyl ether 2.I5 0.50 2.00 108 70-130 <br /> Sequoia Analytical-Morgan Hili The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> 5 of 8 <br />