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819 Striker Avenue Suite t3 <br /> Sequoia Sacramento C 95834 <br /> (916)9Z <br /> t-9600 <br /> FAX Analytical www seyuquollabs 00 <br /> atabsccom <br /> 0 <br /> SECOR International-Rancho Cordova Project ARCO 2133, Stockton,CA Sampled 6/22/00 <br /> 3017 Kilgore Road, Suite 100 Project Number NIA Received 6/23/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 7/10/00 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUF T/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0070061 Date PreVared 7/5/00 Extraction Method EPA 5030B(MeOH) <br /> Blank 0070061-BLK1 <br /> Purgeable Hydrocarbons 7/5/00 ND ug/1 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) - - — -- -- _ _---- „- - -- - - _--- -ND - _ - -- - - 0 500 =-- - - -- - — -- - <br />__Methyl tert-butyl ether ND— 250 <br /> Surrogate a,a a-Trifluorotoluene 100 9 78 60 01140-978 <br /> LCS 0070061=B S 1 <br /> Benzene 7/5/00 too 103 ug/1 700-130 103 <br /> Toluene 100 100 700-130 100 <br /> Ethylbenzene 100 101 700-130 101 <br /> Xylenes(total) 300 303 700-130 101 • <br /> Methyl tert-butyl ether _ 100 105 700-130 105 <br /> Surrogate a a a-Trifluorololuene - 100 103 600-140 103 <br /> Matrix Spike 0070061-MS1 5006307-01 <br /> Benzene 715100 100 ND 101 ug/I 600-140 101 <br /> Toluene 100 ND 101 600-140 101 <br /> Ethylbenzene 100 ND 103 600-140 103 <br /> Xylenes(total) 300 ND 306 600-140 102 <br /> Methyl tent-butyl ether _ _ " _ 100 ND 108 600-140 108 <br /> Surrogate a aa-Trifluorotoluene 100 953 600-140 953 <br /> Matrix Spike Dup 0070061-MSD1 S006307-01 <br /> Benzene 7/5/00 too ND 10 5 ug/1 600-140 105 250 3 88 <br /> Toluene 100 ND 10 5 600-140 105 25 0 388 <br /> Ethylbenzenc 100 ND 106 600-140 106 250 287 <br /> Xylenes(total) 300 ND 31 7 600-140 106 25 0 385 <br /> Methyl tert-butyl ether 100 ND_ 110 _ 600-140 110 250 _-1 83 _ <br /> Surrogate a a a-Trifluorotoluene 100 944 600-140 944 <br /> Batch- 0070062 Date Prepared 716/00 Extraction Method EPA 5030E McOH <br /> Blank 0070062-BLK1 <br /> Purgeable Hydrocarbons 7/6/00 ND ug/1 50 0 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 250 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> ,p� Page 5 of 7 <br />