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819 Straker Avenue Suite 8 <br /> Sequoia Sacramento )9 95834 <br /> (916)921-9600 <br /> 4x (91Analytical FAX(916)921-0100 <br /> OiW www sequoialabs com <br /> SECOR International-Rancho Cordova Project ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/16/02 13 32 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1(S201923-01)Water Sampled 12/31/01 10 10 Received„01/04/02 17 39 - <br /> Purgeable Hydrocarbons ND 50 ug/l 1 2010192 01/15/02 01/15/02 DHS LUFT A-01 <br /> Benzene ND 0 50 " A-01 <br /> Toluene ND 0 50 A-01 <br /> Ethylbenzene ND 050 A-01 <br /> Xylenes(total) ND 050 " A-01 <br /> Surrogate a a a-Trifluorotoluene 859% 60-140 A-01 <br /> MW-2(S201093-02)Water Sampled 12/31/0109 30 Received 01/04/02 17 39 <br /> Purgeable Hydrocarbons 83 50 ugll 1 2010187 01/14/02 01/14/02 DHS LUFT HC-12 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> K <br /> rrogate a a a-Trifluorotoluene 197% 60-140 5-02 <br /> W- 520103)Water Sampled 12/31/01 11 45 Received 01/04/02 17 39 <br /> Purgeable Hydrocarbons 1900 500 ugll 10 2010t87 01/l4/02 01//4/02 DHS LUFT HC-12 <br /> Benzene 60 50 " <br /> Toluene 87 50 <br /> Ethylbenzene ND 50 " <br /> Xylenes(total) 30 50 " <br /> Surrogate aa a-Trifluorotoluene 796% 60-140 <br /> MW-4(S201093-01 Water Sampled 12 1101 12.25 HMeived,91/044Q2,12,19 <br /> 9�,� ,- <br /> Purgeable Hydrocarbons ND 50 ug/I 1 2010187 0I/14/02 01/14/02 DHS LUFT <br /> Benzene ND 050 w w w N N N <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate a,a,a-Trrfluorotaluene 891 % 60-140 " <br /> �quoia Analytical-Sacramento 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 /> Page Page 2 of 23 <br />