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819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> Sequoia (916)921-9600 <br /> 4(D FAX(916)921-0100 <br /> ( Analytical WWW sequolalabs cam <br /> Stratus Environmental Project ARCO 2168,Stockton,CA <br /> 3330 Cameron Park Dave,Ste 550 ProjectNumber 2168,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 08/28/02 14 29 <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 2080260-EPA 5030B PIT <br /> Blank(2080260-BLKI) Prepared&Analyzed 08/26/02 <br /> Purgeable Hydrocarbons ND 50 ugli <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Tris luorotoluene 884 100 88 60-140 <br /> LCS(2080260-BSl) Prepared&Analyzed 08/26/02 <br /> Benzene 931 050 ug/1 100 93 70-130 <br /> Toluene 977 050 100 98 70-130 <br /> Ethylbenzene 975 050 100 98 70-130 <br /> es(total) 299 050 300 100 70-130 <br /> rrogate a a a-Trifluorotoluene 909 100 91 60-140 <br /> Matrix Spike(2080260-MS1) Source S208287-03 Prepared&Analyzed 08/26/02 <br /> Benzene 325 0 50 ug/1 100 23 95 60-140 <br /> Toluene 102 050 100 052 97 60-140 <br /> Ethylbenzene 152 050 100 56 96 60-140 <br /> Xylenes(total) 337 050 300 44 98 60-140 <br /> Surrogate a a a-Trtfluorotoluene 952 100 95 60-140 <br /> Matrix Spike Dup(2080260-MSDI) Source 5208287-03 Prepared&Analyzed 08/26/02 <br /> Benzene 327 050 ug/l 100 23 97 60-140 0 6 25 <br /> Toluene 104 050 100 0 52 99 60-140 2 25 <br /> Ethylbenzene 152 0 50 100 5 6 96 60-140 0 25 <br /> Xylenes(total) 348 050 300 44 101 60-140 3 25 <br /> Surrogate a a a-Trifluorotoluene 92.5 100 91 60-140 <br /> nota 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 I] <br />