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' 404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> 4D— Analytical www seguoialabs corn <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 03-May-02 18 30 <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 Method Notes <br />' MW-9(WZ04355-01)Water Sampled 18-Apr-02 12 30 Received 19-Apr-02 09 30 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/l I 2D24001 29-Apr-02 29-Apr-02 DHS LUFT <br /> Benzene ND 050 ^ " <br /> Toluene ND 050 " Q-28a <br />' Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 Q-28 <br /> Surrogate a a a-Trifluorotoluene 108% 70-130 " <br /> IMW-2(W204355-02)Water Sampled 18-Apr-02 14 00 Received 19-Apr-02 09 30 <br /> Purgeable Hydrocarbons(C6-C12) 25000 10000 ugll 200 2D24001 29-Apr-02 29-Apr-02 DHS LUFT <br /> Benzene 10000 100 " <br /> Toluene ND 100 " " R Q-28a <br /> Ethylbenzene 810 100 " <br /> Xylenes(total) 1000 100 ^ " " Q-28 <br /> arrogate a a a-Trifluorotoluene 104% 70-130 " <br /> i -2A(W204355-03)Water Sampled 18-Apr-02 14 55 Received 19-Apr-02 09 30 - .- <br /> Purgeable Hydrocarbons(C6-C12) 1100 500 ugA 10 2D29003 0I-May-02 01-May-02 DHS LUFT <br /> Benzene 310 5 0 <br /> Toluene ND 5 0 " <br /> Ethylbenzene 56 5 0 ^ " <br /> Xylenes(total) 16 5 0 ^ ^ ^ <br /> ISurrogate a a a-Trifluorotoluene 115% 70-130 " <br /> EB-1 (W204355-04)Water Sampled 18-Apr-02 16 40 Received 19-Apr-02 09 30 <br />' Purgeable Hydrocarbons(C6-C12) ND 50 ug/l 1 2D29003 29-Apr-02 29-Apr-02 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 " ^ " <br />' Xylenes(total) ND 0 50 ^ 'I <br /> Surrogate a a a-Trifluorotoluene 103% 70-130 " <br /> L <br /> I <br /> Sequoia Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> 0 custody document This analytical report must be reproduced in its entirety <br /> I <br /> 2 of 7 <br />