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819 Striker Avenue Suite 8 <br /> Seq �q ora Sacramento C 9 <br /> i�•� (9 16)922 1-960096W <br /> (D <br /> fAX(916)921-0 100 <br /> Analytical www sequoialabs com <br /> Stratus Environmental Project ARCO 6100,Tracy,CA <br /> 3330 Cameron Park Drive,Ste 550 Project Number 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 ProlectManager Jay Johnson 07/03/02 13 11 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyts Result Limit Units Level Result %REC Limits RPD limit Notes <br /> Batch 2070028-EPA 5030B (PI <br /> Blank(2070028-BLKI) Prepared&Analyzed 06/28/02 <br /> Purgeable Hydrocarbons ND SO ug/l <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethy?benzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Sui r ogate a a a-Triuorotoluene 1190 100 100 60-140 W <br /> LCS2( 070028-BSI) Prepared&Analyzed 06/28/02 <br /> Benzene 958 050 ug/l 100 96 70-130 <br /> Toluene 101 050 100 101 70-130 <br /> 0hylbcnzene 100 050 '1 100 100 70-130 -- -- <br /> lenes(total) 305 050 300 102 70-130 <br /> Surrogate a a a-Try7uoroioluene 10 7 100 107 60-140 <br /> Matrix Spike(2070028-MSI) Source 5206335-02 Prepared&Analyzed 06/28/02 <br /> Benzene 930 050 ug/l 100 ND 88 60-140 <br /> Toluene 997 050 100 ND 100 60-140 <br /> Ethylbenzene 981 050 100 ND 98 60-140 <br /> Xylenes(total) 30 1 050 300 ND 100 60-140 <br /> Surrogate a a a-Tris luorotoluene 106 100 106 60-140 <br /> Matrix Spike Dup(2070028-MSDI) Source 5206335-02 Prepared&Analyzed 06/28/02 <br /> Benzene 984 050 ug/l 100 ND 94 60-140 6 25 <br /> Toluene 103 050 100 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-Tris luorotoluene 103 1919 103 60-140 <br /> Wequoia Analytical- Sacramento The results to 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 4 of 6 <br />