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Sequoia 680 Chesapeake Drive Pcdwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> 819 Striker Avenue Suitt 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> �I� Analytical <br /> 0 <br />-MCQN -Sac Project Arco 2168, Stockton,CA Sampled 5/21198 to 5/22/98 <br /> 433 N Market Blvd Project Number 2231200 <br /> Sacramento, CA 95834 Received 5122198 <br /> Pro3ect Manager Dave Foley Reported 6/15/98 <br /> Total Purgeable Hydrocarbons(1126-C12), BTEX and MTBE by DHS LU1~T/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD =RPDnalyte Analyzed Level Result Result Units RecovLlmlts % Llmlt <br /> 1 6004�13LM <br /> trrogate a a a-Trtfluorotoluene 6/2/98 100 986 119/1 600-140 986 <br /> CS 8060043-13SM <br /> enzene 6/2/98 100 108 ug/I 700-130 108 <br />)luene 100 100 700-130 100 <br /> hylbenzene 100 9 86 700-130 98 6 <br /> ylenes(total) 300 289 70 0-130 96 3 <br /> ethyl tert-butyl ether f 0 0 109 70 0-130 l 09 <br /> rrogate a a a-Trifluorotoluene /00 9 25 60 0-140 92 5 <br /> alrix Spm U-60043-MSI 5805302-04 <br /> nzene 6/2/98 too ND 10 1 ug/l 600-140 101 <br /> luene 100 ND 9 61 GO 0-140 96 l <br /> lyl ne t 0 0 ND 942 60 0-140 94 2 <br /> le otal) 300 ND 279 600-140 93 0 <br /> thyl tent-butyl ether too ND 1 1 3 60 0-140 1I3 <br />,rogate aaa-Trrfluorotoluene /00 980 60 0-140 91 0 <br /> 806Q043-MSM S$05302-04 <br /> lzene 6/2/98 100 ND 10 7 ug/I 600-140 107 250 S 77 <br /> uene 100 ND 9 93 60 0-140 99 3 25 0 3 28 <br /> ylbenzene too ND 977 600-140 977 250 3 65 <br /> lenes(total) 300 ND 288 66 0-140 96 0 25 0 3 9 7 <br /> thyl tert-butyl ether too ND 102 600-140 02 25 0 10 2 <br /> 9 <br /> rogate aaa-Trtfluar otoluene 100 938 60 0-140 91 8 <br /> 0 <br /> iota Analytical-Sacramento *Refer to end of report for text of notes and de <br /> finurons <br /> Id W Bobel,Client Services Representative Page 7 of 10 <br />