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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 9583.4 <br /> {916}921-9600 <br /> FAX 00Analytic l www segLIOialabs com <br /> Stratus Environmental Protect ARCO 6100,Tracy,CA <br /> 3330 Cameron Park Dnve, Ste 550 Project Number 6100,Tracy, CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 07/05/02 11 10 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %UC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notcs <br /> Batch 2070028-EPA 5030B(P/T) <br /> Blank(2070028-BLKI) Prepared&Analyzed 06/28/02 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> EthyIbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Tris luorotoluene 100 100 100 60-140 <br /> LCS(2070028-BSI) Prepared&Analyzed 06/28/02 <br /> Benzene 958 030 ug/l 100 96 70-130 W <br /> Toluene 101 050 100 101 70-130 <br /> ylbenzene 100 050 100 100 70-130 <br /> eves(total} 305 050 30 0 102 70-130 <br /> Surrogate a a a-Try7uorotoluene 10 7 100 107 60-140 <br /> Matrix Spike(2070028-MSI) Source 5206335-02 Prepared&Analyzed 06/28/02 <br /> Benzene 930 050 ugll 100 ND 88 60-140 <br /> Toluene 997 050 100 ND 100 60-140 <br /> Ethylbenzene 9 81 050 100 ND 98 60-I40 <br /> Xylenes(total) 301 050 300 ND 100 60-140 <br /> Surrogate a a a-Trtfluorotoluene 10 6 100 106 60-140 <br /> Matrix Spike Dup(2070028-MSD1) Source S206335-02 Prepared&Analyzed 06/28/02 <br /> Benzene 994 050 ug/l 100 ND 94 60-140 6 25 <br /> Toluene 103 030 100 ND 103 60-140 3 25 <br /> Ethylbenzene 103 050 100 ND 103 60-140 5 25 <br /> Xylenes(total) 31 5 050 300 ND 105 60-140 5 25 <br /> Surrogate a a a-Trifluorotoluene 103 100 W 103 60 140 <br /> quota Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thu analytical report must he reproduced in its entirety <br /> Page 4 of 7 <br />