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Sequoia 404 N.,CA Lane <br /> ,!TS Walnut Creek,CA 94598 <br /> (925)989-9600 <br /> FFAnalytical FA. <br /> equo 988 .com <br /> � www.sequolalabs.com <br /> ,f <br /> Roy F.Weston-Walnut Creek Project: San Joaquin HSA <br /> 1575 Treat Blvd,Ste 212 Project Number: - <br /> Walnut Creek CA,94546 Reported: <br /> Project Manager: Karla Brasaemle 15-Mar-01 18:16 <br /> rTotal 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 1C04002-EPA 5030B PIT <br /> Blank(1C04002-BLK1) Prepared&Analyzed:04-Mar-OI <br /> k ' Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0.50 " <br /> r^ <br /> p Toluene ND 0.50 <br />�.. Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Trrfluorotoluene, 31.5 30.0 105 70-130 <br /> LCS(1004002-BS1) Prepared&Analyzed:04-Mar-Ol <br /> $enzene 17.2 0,50 ug/I 20.0 86.0 70-130 <br /> Toluene 17.7 0.50 20.0 88.5 70-130 <br /> + Ethylbenzene 18.4 0.50 20.0 92.0 70-130 <br /> Xylenes(total) 55.8 0.50 60.0 93.0 70-130 <br />�"`�urrogate:a,a,a-Trifluoroioluene 31.5 30,0 105 70.130 <br /> 1 <br /> vlatrix Spike(1004002-MSI) Source:W102644-08 Prepared&Analyzed:04-Mar-01 <br /> Benzene 17.5 0.50 ugll 20.0 ND 87.5 70-130 <br /> Toluene 18.5 0.50 20.0 ND 92.5 70-130 <br /> Ethylbenzene 19.5 0.50 20.0 ND 97.5 70-130 <br /> Xylenes(total) 59.2 0.50 60.0 ND 98.7 70430 ) <br /> l" <br /> Surrogate:aa,a-Trifluorotoluene 31.7 30.0 106 70-130 <br />_ t <br /> Matrix Spike Dup(1004002.-MSD1) Source:W102644-08 Prepared&Analyzed:04-Mar-01 <br /> Benzene 21.1 0.50 ug/l 20.0 ND 106 70-130 18.7 20 <br /> Toluene 21.7 0.50 20.0 ND 109 70-130 15.9 20 <br /> Ethylbenzene 22.4 0.50 20.0 ND 112 70-130 13.8 20 <br /> Xylenes(total) 67.3 0.50 60.0 ND 112 70-130 12.8 20 <br /> Surrogate:a,a,a-Trifluorotoluene 37.2 30.0 124 70-130 <br /> I . <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 entirety. <br /> Page 3 of 5 <br />