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Sequoia 819 acrAvenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical41) <br /> FAX(916)921-0100 <br /> FAX <br /> sequoialabs corn <br /> i <br /> Stratus Environmental Project ARCO 2168,Stockton,CA <br /> 3330 Cameron Park Drive,Ste 550 Project"Number 2168,Stockton,CA [reported <br /> Cameron Park CA, 95682 ProjectManager Jay Johnson 06/21/02 12 28 <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 2060220-EPA 5030E(P/T <br /> Blank(2060220-13LKl) Prepared&Analyzed 06/17/02 <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-Tnfluorotoluene 933 1019 93 60-140 <br /> LCS(2060220-BSI) Prepared&Analyzed 06/17/02 <br /> Benzene 869 050 ug/l 100 87 70-130 <br /> Toluene 953 050 100 95 70-130 <br /> 0hylbenzene 960 050 i 100 96 70-130 <br /> lenes(total) 250 050 300 83 70-130 <br /> Surrogate a a a-Trifluoroioluene 969 100 97 60-140 <br /> Matrix Spike(2060220-MS1) Source S206168-02 Prepared&Analyzed 06/17/02 <br /> Benzene 107 050 ug/1 100 3 6 71 60-140 <br /> Toluene 949 050 100 ND 95 60-140 <br /> Ethylbenzene 967 050 100 ND 93 60-140 <br /> Xylenes(total) 25 8 050 300 060 84 60-140 <br /> Surrogate a a a-Triuoiotoluene 931 100 93 60-140 <br /> Matrix Spike Dup(2060220-MSD1) Source 5206168-02 Prepared&Analyzed 06/17/02 <br /> Benzene 105 050 ug/l 100 3 6 69 60-140 2 25 <br /> Toluene 925 050 100 ND 92 60-140 3 25 <br /> Ethylbenzene 939 050 100 ND 90 60-140 3 25 <br /> Xylenes(total) 251 050 300 060 82 60-140 3 25 <br /> Surrogate a a a-Trifluorotoluene 938 _16 0 94 60-140 <br /> AdIk <br /> equola 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 7 of 10 <br />