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4 <br /> Sequoa 885 Jarvis Drive <br /> ia ` Morgan Hill,CA 95037 <br /> (408) 776-9600 <br /> Analytical FAX(408) 782-6308 <br /> 1 � - <br /> ATC Associates,Inc.-Modesto Project: - Sampled: 12/2/99 <br /> 1117 Lone Palm Avenue Project Number: Stockton Fire Station#3 Received: 12/3/99 <br /> Modesto,CA 95351-1502 Project Manager: Jeanne Homsey Reported: 12/13/99 <br /> -Total=Purgeable Hydrocarbons(C6-C12)and BTEX by LUlFTlQuality Control.^" <br /> Sequoia <br /> Analytical'-;Morgan;Hill <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte a Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 9120135 Date Prepared: 12/6/99 Extraction Method: EPA 5030B IP/TI <br /> Blank 9120135-BLKI <br /> Purgeable Hydrocarbons 12/6/99 ND ug/1 50.0 <br /> Benzene ND 0.500 ' <br /> Toluene 1 ND 0.500 <br /> Ethylbenzene " ND 0.500 <br /> Xylenes(total) _ __ ND _ 0.500 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.24 70.0-130 92.4' <br /> LCS p 9120135-BSI <br /> Purgeable Hydrocarbons 12/6/99 250 221 ug/1 70.0-130 88.4 <br /> iSurrogate: a,a,a-Trifluorotoluene 10.0 1011 70.0-130 101 <br /> i Matrix Spike 9120135-MSI M912115-02 <br /> eable Hydrocarbons 12/6/99 250 ND 206 ug/I 60.0-140 82.4 <br /> ! ogate: a,a,a-Trij`luorotoluene IO.Q 8.64 70.0-130 86.4' <br /> Matrix Spike Dup 9120135-MSD1 M912115-02 <br /> Purgeable Hydrocarbons 12/6/99 250 ND 211 ug/I 60.0-140- 84.4 25.0 2.40 <br /> i Surrogate: a,a,a-Trifluorotoluene " 10.0 9.25 70.0-130 92.5 <br /> F <br /> A <br /> A <br />} <br /> Sequoia Analytical-Morgan Hill *Refer to end of report for text of notes and definitions. <br /> I <br /> Page 4 of'6 <br />