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885 Jarvis Drive <br /> ID Sequoia Morgan Hill CA 95037 <br /> (408) 776-9600 <br /> 1#0 Analytical <br /> FAX(408) 782-6308 <br />' ETIEEngm:eering Inc-WC(Exxon) Project Exxon Sampled 8120/99 <br /> 144Way ProjectNumber 7-3942 Received 8/23/99 <br /> WalCA 94596 Pro ect Mana er Chris Chatburn Reported 911199 <br /> I`o#aF'Purgeable hydrocarbons(C5=C1 ),BTEX and MTBE by DHS LUFT/Quality,Control <br /> - a -- Sequoia Analyttcal—Morgan Hill <br />' Date Spike Sample QC Reporting limit Recov RPD RPD <br /> [Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br />' Matrix Spike Du continued 9081032-MSDI 9080815-07 <br /> Ethylbenzene 8/30/99 100 ND 883 ug/l 600-140 883 250 475 <br /> Xylenes(total) _ _ _ " _ 300 ND 269 600-140 897 25_0_ 393 <br />' Surrogate a a a-Trifluorotoluene 100 944 lo700-130 944 <br /> Batch 9081050 Rate Prepared 8131/99 Extraction Method EPA 5030B <br />' Blank 9081050-BLK1 <br /> Purgeable Hydrocarbons 8131/99 ND ug/l 500 <br /> Ben7cne ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylben7ene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 250 <br /> Ila ogate aaa-7rifluor ololuene 100 102 700-130 102 <br /> LCS 9081050-BSI <br /> Benzene 8/31/99 100 9 21 ug/l 700-130 92 1 <br />' Toluene 100 9 13 700-130 91 3 <br /> l-thylbcn7,-nc 100 9 35 700-130 93 5 <br /> Xylenes(total) 300 28 5 700-130 950 <br />' Surrogate aaa-Tri luorotoluene 100 927 700-130 92 7 <br /> Matrix Spike 9081050-MS1 9080584-03 <br /> BLIA/uu. 8/31/99 100 ND 922 U_U' l 600-140 92 2 <br />' Toluene 100 ND 876 " 600-140 876 <br /> I'thylben/ene 100 ND 909 600-140 909 <br /> Xyluus(total) 300 ND 275 600-140 91 7 <br /> Sur)ogate aaa-7rif um ololuene 100 733 700-130 73 3 <br />' Matrix Spike Dan 90810SO-MSDI 9080584-03 <br /> Benzene 8131/99 10 0 ND 926 ug/l 600-140 926 25 0 0 433 <br />' Toluenei' 10 0 ND 884 1 600-140 884 250 0 909 <br /> Cthylbeniene 100 ND 9 10 600-140 91 0 250 0 110 <br /> Xylenes(total) 300 ND 27 7 600-140 923 250 0 652 <br /> Surrogate aaa-Trefluoi ololuene 10 0 747 700-130 74 7 <br /> 0 <br />' Sequoia Analytical-Morgan hill *Refer to end ofreport for text of notes and definitions <br /> 1 Page 8 of 9 <br />