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404 N Wiget Lane <br /> Sequoia Walnut Geek,CA 94598 <br /> 4D (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> FAX <br /> sequoialabs cnm <br /> Roy F Weston-Walnut Creek Project San Joaquin HSA <br /> 1575 Treat Blvd Ste 212 Project Number - Reported <br /> Walnut Creek CA 94596 Project Manager Jessica Levine 21-Feb-02 I8 42 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed MethodNotes <br /> MW-9(W202081-01)Water Sampled 05-Feb-02 10 22 Received 06-Feb-02 18 20 <br /> Purgeable Hydrocarbon%(C6-C12) ND 50 ugll 1 2BO7009 07-Feb-02 07-Feb-02 DHS LUFT <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trifluorotoluene 102% 70-130 <br /> MW-7(W202081-02)Water Sampled 05-Feb-02 1130 Received 06-Feb-02 18 20 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ugli 1 2807009 07-Feb-02 07-Feb-02 DHS LUFT <br /> Benzene 2 8 050 ^ ^ " 13-Feb-02 QR-04 <br /> Toluene ND 050 07-Feb-02 <br /> Ethylbenzene ND 050 N " <br /> Xylenes(total) ND 050 n ^ « <br /> Surrogate a a a-Tr fhtorotoluene 107% 70-130 ^ __ <br /> -6(W202081-03)Water Sampled 05-Feb-02 17 40 Received 06-Feb-02 18 20 <br /> geable Hydrocarbons(C6-C12) 60 50 ugA 1 2B07009 07-Feb-02 07-Feb-02 DHS LUFT <br /> Benzene 24 050 <br /> Toluene ND 0 50 <br /> Ethylbenzene 054 0 50 ^ ^ <br /> Xylenes(total) ND 0 50 ^ " <br /> Surrogate a a a-Trtfluorotolucne 108% 70-130 <br /> MW-5(W202081-04)Water Sampled 06-Feb-02 09 25 Received 06-Feb-02 18 20 <br /> Purgeable Hydrocarbons(C6-C12) 61 50 ug/l 1 2807009 07-Feb-02 07-Feb-02 DHS LUFT HC-12 <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 ^ ^ <br /> Surrogate a a a-Trtfluorotoluene 393% T70-130 " S-04 <br /> Sequoia Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its enlirety <br /> 2 of 8 <br />