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K <br /> Sequoia 885 Jarvis Drive <br /> Morgan Hill CA 95037 <br /> (408) 776-9600 <br /> Analytical FAX(408) 782-6308 <br /> ATC Associates, Inc -Modesto Project Stockton Fire Station#2 Sampled 7/6/99 <br /> 1117 Lone Palm Avenue Project Number #5462574 0001 Received 7/8/99 <br /> Modesto,CA 95351-1502 Project Manager Jeanne Homsey Reported 7/20/99 <br /> Total Purgeable Hydrocarbons(C6-Cl2),BTEX and MTBE by DHS LUFT/Quality Control ' <br /> Sequoia Analytical-MorganHill_ z <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result [Units Recov Limits % Limit % Notes* <br /> Batch 9070596 Date Prepared 7119/99 Extraetion Method EPA 5030B [P/TI <br /> Blank 9070596-BLKI <br /> Purgeable Hydrocarbons 7/19199 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether _ ND 2 50 <br /> Surrogate a,a,a-Trifluorotoluene <br /> 100 -9731 70 0-130 931 <br /> LCS 9070596-BSI <br /> Purgeable Hydrocarbons 7/19/99 250 265 ug/1 700-130 106 _ <br /> Surrogate a a,a-Trii luorofoluene 100 121 700-130 121 <br /> Aftrix S ike 9070596-MSI M907374-02 <br /> eable Hydrocarbons __ 7/19/99 250 ND _ 245 ug/I 600-140 98 0 <br /> Surrogate a a a-Trifluorotoluene 100 112 11700-130 112 <br /> Matrix Spike Dup 9070596-MSD1 M907374-02 <br /> Purgeable Hydrocarbons _ 7/19/99 250 ND_ 265 ug/1 600-140 106 2_5_0 784 <br /> Surrogate a a a-Trifluorotoluene 100 118 700-130 118 <br /> 0 <br /> Sequoia Analytical-Morgan Hill 'Refer to end of report for text of notes and definitions <br /> I <br /> Page 7of9 <br />