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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 4D— (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequotalabs com <br /> Stratus Environmental Project Arco 2130,Stockton,CA <br /> 3330 Cameron Park Dnve, Ste 550 Pro)ect Number 2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 09/I8/02 17 43 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - QuaIlty 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 2090160-EPA 5030B(PIT) <br /> Blank(2090160-BLK1) Prepared&Analyzed 09/17/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trifluorotoluene 881 100 88 60-140 <br /> LCS(2090160-BSI) Prepared&Analyzed 09/17/02 <br /> Benzene 8 82 050 ug/l 100 88 70-130 <br /> Toluene 9 72 050 100 97 70-130 <br /> Ethylbenzene 9 72 050 100 97 70-130 <br /> dates(total) 301 050 300 100 70-130 <br /> rrogate a a a-Triuorotoluene 923 " 100 92 60-140 <br /> _Matrix Spike(2090160-MSI) Source S209217-07 Prepared&Analyzed 09/17/02 <br /> Benzene 878 050 ug/l 100 ND 86 60-140 <br /> Toluene 9 75 050 100 ND 98 60-140 <br /> Ethylbenzene 972 050 too ND 97 60-140 <br /> Xylenes(total) 300 050 300 ND 100 60-140 <br /> Surrogate a a a-Trti luorotoluene 8 77 100 88 60-140 <br /> Matrix Spike Dup(2090160-MSDI) Source S209217-07 Prepared&Analyzed 09/17/02 <br /> Benzene 863 050 ug/l 100 ND 85 60-140 2 25 <br /> Toluene 954 050 too ND 95 60-140 2 25 <br /> Ethylbenzene 953 050 100 ND 95 60-140 2 25 <br /> Xylenes(total) 293 050 300 ND 98 60-140 2 25 <br /> i <br /> Surrogate a a a-Trifluorotoluene 846 100 85 60-140 <br /> oto 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 6 of 9 <br />