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Sequoia 885 Jarvis <br /> Morgan F1tll,CACA 95037 95037 <br /> Anal tical (408)77 <br /> Y FAX(408)7822 6100 <br /> 6308 <br /> www seauwalabs torr <br /> tratus Environmental Inc Project ARCO##2186,Stockton,CA <br /> 30 Cameron Park Dr,Suite Project Number ARCO#12186,Stockton,CA Reported <br /> ameron Park CA,95682 Project Manager Jay Johnson 10/02/02 17 52 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Morgan 13111 <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %R-EC Limits RPD Limit Notes <br /> Batch 2126018-EPA 5030B PIT <br /> LCS(2I26018-BS1) Prepared&Analyzed 09/26/02 <br /> Methyl tert-butyl ether 926 050 ug/1 100 926 63-137 <br /> Benzene 8 83 0 50 10 0 88 3 78-I24 <br /> Toluene 899 050 10 0 89 9 78-129 <br /> Surrogate 12-Dichloroethane-d4 5 02 5 00 100 78-129 <br /> LCS(2I26018-BS2) Prepared&Analyzed 09/26/02 <br /> Methyl tent-butyl ether 8 58 0 50 ug/I 8 40 102 63-I37 <br /> Benzene 5 08 0 50 5 28 962 78-124 <br /> Toluene 31 9 050 31 8 100 78-129 <br /> Gasoline Range Organics(C6-C10) 412 50 440 93 6 70-113 <br /> Surrogate 12-Drchloroethane-d4 531 500 106 78-129 <br /> LCS Du 2I26018-BSD1 Prepared&Analyzed 09/26/02 <br /> Methyl tent-butyl ether 930 050 ug/l 100 93 0 63-137 0 431 13 <br /> ene 8 90 050 100 890 78-124 0 790 12 <br /> o uene 9 10 050 100 91 0 78-129 1 22 10 <br /> Surrogate 12-Drchloroethane-d4 5 10 500 102 78-129 <br /> LCS Du (2I26018-BSD2) Pre ared&Analyzed 09/26/02 <br /> Methyl tert-butyl ether 8 12 0 50 ug/l 8 40 967 63-137 5 51 13 <br /> Benzene 4 77 0 50 5 28 903 78-124 629 12 <br /> Toluene 305 050 31 8 95 9 78-129 449 10 <br /> Gasoline Range Organics(C6-C10) 405 50 440 92 0 70-113 1 71 9 <br /> Surrogate 12-Dichloroethane-d4 487 500 974 78-129 <br /> ora Analytical-Morgan Hill 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 /> 9of10 <br />