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404 N Wiget Lane <br /> Sequoia Walnut Geek CA 94598 <br /> (925)988-9600 <br /> Analytical FAX cgOo 968-9673 <br /> FAX <br /> sequolalabs coin <br />' Roy F Weston-Walnut Creel, 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 18 42 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical- Walnut Creek <br />' Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />' Batch 2B07009- EPA 5030B P/T <br /> LCS(2B07009-BSI) Prepared&Analyzed 07-Feb-02 <br /> Benzene T 200 050 ug/l 20 0 100------70-130 <br />' Toluene 209 050 200 104 70-130 <br /> Ethylbenzene 215 050 200 108 70-130 <br /> Xylenes(total) 658 050 600 110 70-130 <br />' Surrogate aaa-Influorotolucnc -- 337 300 112 70-130 <br /> LCS(2B07009-BS2) Prepared&Analyzed I I-Feb-02 <br /> Benzene T---- 164 050 ug/I W 200 -� �82 70-130 --- <br />' Toluene 181 050 n 200 90 70-130 <br /> Ethylbenzene 180 050 200 90 70-130 <br /> Xylenes(total) 576 050 600 96 70-130 <br /> Surrogate a a a-Trifluorotohrene 29 7 70-130 <br /> (2B07009_BS3) <br /> W Prepared&Analyzed I2-Feb-02 <br /> Benzene 179 050 ugA 200 90 70-130 <br /> Toluene 181 050 200 90 70-130 <br /> Ethylbenzene 191 050 N200 96 70-130 <br /> Xylenes(total) 568 050 600 95 70-130 <br /> Surrogatc aaa-1 rifluorotoluenc -mm --297 <br /> 300 4 -- ----99 70-130 <br /> LCS(2B07009-BS4) _ Prepared&Analyzed 13-Feb-02 <br /> Benzene _ 21 4 050 ugh 200 107 70-130 <br />' Toluene 21 1 050 200 106 70-130 <br /> Ethylbenzene 18 8 050 200 94 70-130 <br /> Xylenes(total) 58 1 050 600 97 70-130 <br /> Surrogate a a a-Trifluorololuene 352 300 117 70-130 <br /> Matrix Spike(2B07009-MSI) Source W202081-01 Prepared&Analyzed 07-Feb-02 <br /> Benzene T 180 050 ugh _ 200 ND 90 70-130 <br />' Toluene 194 050 200 ND 92 70-130 <br /> Ethylbenzene 182 050 200 ND 91 70-130 <br /> Xylenes(total) 583 050 600 ND 97 70-130 <br /> Surrogate a a a-Trifluorotoluenc 295 300 98 70-130 <br /> Sequoia Analytical- Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Mis analytical report must be reproduced in its entirety <br /> 6 of 8 <br /> i <br />