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819 Striker Avenue,Suite 8 <br /> Sequoia Sacrarne5834 <br /> (916)A 99600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs oom <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA <br /> 3017 Kilgore Road,State 100 Project Number 2093,Tracy,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/08/02 17 22 <br /> lot.Furgeable Hydrocarbons and BTEX by DHS LUF r-Qna—lity, C ontmi <br /> Sequoia Analytical- Sacramento <br /> Repotting Spike Source %REC RPD <br /> cyte Result Limit Units Level Result %REC Lunits RPD Limit Notes <br /> Batch 2010006-EPA 5030B(P/1) <br /> Blank(2010006-BLKI) Prepared&Analyzed 12/31/01 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a,a,a-Trifluorotoluene 107 " 100 107 60-140 <br /> LCS 2010006-BS1 Prepared&Analyzed 12/31/01 <br /> Benzene 102 050 ug/l 100 102 70-130 <br /> Toluene 101 050 100 101 70-130 <br /> Ethylbenzene 9 80 050 100 980 70-130 <br /> Xylenes(total) 30 1 050 300 100 70-130 <br /> Surrogate a,a,a-Trifiuorotoluene 11 1 100 _ 111 60-140 <br /> Matrix Spike(2010006-MSI) Source.5112339-05 Prepared&Analyzed 12/31/01 <br /> Benzene 102 050 ug/I 100 ND 102 60-140 <br /> Toluene 9 98 050 100 ND 998 60-140 <br /> Ethylbenzene 9 74 050 100 ND 974 60-140 <br /> --- -Xylenes(total) 30 0 0 50=-"� 30 0 ND 100=60-140= -— -=- - - - <br /> Surrogate a a a-Trtfluorotoluene 108 100 108 60-140 <br /> Matrix Spike Dup(2010006-MSDI) Source 5112339-05 Prepared&Analyzed 12/31/01 <br /> Benzene ---" _ - -_- -- 10 5 -- -0 50- ugh 10 0 --ND-- 105 - 60-140—2 90-- - -25- <br /> Toluene <br /> 25 Toluene 10 3 050 10 0 ND 103 60-140 3 16 25 <br /> Ethylbenzene 100 050 10 0 ND 100 60-140 2 63 25 <br /> Xylenes(total) 309 050 30 0 ND 103 60-140 296 25 <br /> Surrogate a,a,a-Trifluorotoluene 104 100 104 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 5 of 8 <br />