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1 u I <br /> { f 1 <br /> 4 <br /> 1 <br /> Sequoia I 885J CA rvis <br /> Morgan 40HilCA 76 9600 <br /> I <br /> Analytical I " ++ t (408)7824608 <br /> FAX(408)ala Scor <br /> o. www sequoia labs coni• <br /> I z <br /> Secor-Rancho Cordova(ARCO) Project ARCO#0595,Stockton, CA MNA0270 <br /> 3017 Kilgore Rd Suite 100 - - - Project Number'-38983^ - w �* Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/26/04 14 ]'l <br />— -- -- Volatile Organic Compounds by EPA-Method 8260B-Quality Control-- -- -- -- - <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> po g <br /> Analyte '- Result Limit Units level _ -Result %REC _ Limits __ RPD u Lim------------ <br /> +t Notes <br /> ' <br /> Batch 4A19002-EPA 5030E PIT <br /> Matrix Spike Dup(4A19002-MSD1) Source MNA0270-09 Prepared 01/19/04 Analyzed 01/20/04 <br /> Methyl tert-butyl ether 19 1 0 50 u0 992 11 81 7 63-137 189 20 QR-07 <br /> Benzene 5 33 050 640 ND 83 3 69-124 1 86 ' 20 <br /> Toluene 304 050 29 7 0 15 i 102 78-129 ,0 329 20 <br /> Ethylbenzene 7 05 050 b 96 ND -101 84-132 1 13 20 <br /> Xylenes(total) 36 3 0 50 33 7 ND 108 83-137 1 64 20 <br /> Gasoline Range Organics 386 50 , 440 ND 87 7 70-1 13 34 5 9 QR-07 <br /> Surrogate 12-Dichloroethane d4 5 11 500 101 78-119 <br />' Y4---Batch 4A20011-EPA 5030E P/T` -- - - - �- _ — T - <br /> Blank 4A20011-BLK1 Pre pared&Anal zed 01/20/04 + <br /> Ethanol ND-- - 100 ugll <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tent butyl ether ND 050 " <br /> Di-isopropyl ether ND 0 50 " <br /> I <br /> Ethyl tort-butyl ether ND 0 50 " <br /> tert-Amyl methyl ether ND 0 50 <br /> 1,2-Dichloroetharie _ND______0 50 <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> Benzene -- - -LL -- --ND----O 50 - - -- --- - _--- --- -- -- — - <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50' _ <br /> Xylencs(total) ND 050 " <br /> Gasoline Range Organics ND 50 " <br /> Surrogate 12-Dtchloroethane-d4 4 88 500 976 78-129 <br /> Laboratory Control Sample(4A20011-BSI) Prepared&Analyzed 01/20/04 <br /> Ethanol 199 100 ugll 200 99 5 31-143 <br /> tert-Butyl alcohol 51 9 20 50 0 104 56-131 <br /> Methyl tett-butyl ether - 10 5 0 50 100 105. 63-137 - - <br /> Di-isopropyl ether 11 0 ,r` 0 50 10 0 110 76-130 - - <br /> ----Ethyl tent-butyl etherI 1 1 050 10 0 111 81-121 <br /> tett-Amyl methyl ether _ 106 _ 050 10 0 _ 106 82-140 <br /> 1,2-Dichloroethane 109 0 50 10 0 109 77-136 <br /> 1,2-Mbromoethane(EDB) 11 2 050 100 112 77-132 <br /> Benzene 10 5 0 50 100 105 69-124 <br /> Toluene 10 7 0 50 10 0 107 78-129 <br /> Sequoia Analytical -Morgan Hill The results to this report apply to the samples analyzed in accordance with the chain <br /> of cusiody document Unless otherwrse stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> ` Page 12 of 18 <br />