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.i 1 <br /> �e819 Sinker Avenue Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> IQWAnalytical FAX(916)921 0100 <br /> www sequoialabs com <br /> Environmental Project ARCO 6080,Lathrop,CA <br /> 301 ameron Park Drive, Ste 550 ProlectNumber NIA Reported <br /> Cn Park CA,95682 Project Manager Jay Johnson 06/28/02 13 09 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2060333-EPA 5030B PIT) <br /> Blank(2060333-BLK1) Prepared&Analyzed 06/26/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trifluorotoluene 996 100 100 60-140 <br /> LCS(2460333-BS1) Prepared&Analyzed 06/26/02 <br /> Benzene 960 050 ug/1 10 0 96 70-130 <br /> Toluene 101 050 100 101 70-130 <br /> Ethylbenzene 994 050 100 99 70-130 <br /> Xylenes(total) 306 050 30 0 102 70-130 <br /> INrogate a a a-Trtfluorotoluene 108 100 108 60-140 <br /> Spike(2060333-MS1) Source 5206306-01 Prepared&Analyzed 06/26/02 <br /> Benzene 9 89 050 ug/1 100 ND 96 60-140 <br /> Toluene 102 050 10 0 ND 102 60-140 <br /> Ethylbenzene 993 050 100 ND 99 60-140 <br /> Xylenes(total) 31 0 050 300 ND 103 60-140 <br /> Surrogate a a a-Trifluorotoluene 109 100 109 60-140 <br /> Matrix Spike Dup(2060333-MSDl) Source S206306-01 Prepared&Analyzed 06/26/02 <br /> Benzene 106 0 50 ug/l 100 ND 103 60-140 7 25 <br /> Toluene 108 050 100 ND 108 60-140 6 25 <br /> Ethylbenzene 10 7 050 100 ND 107 60-140 7 25 <br /> Xylenes(total) 32 7 050 300 ND 109 60-140 5 25 <br /> Surrogate a a a-Trfluorotoluene 109 100 109 60-140 <br /> uola Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analyttcal report must be reproduced in its entirety <br /> Page Page 4 of 6 <br />