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885 Jarvis DriveSequoia Morgan Hill CA 95037 <br /> (408) 776-9600 <br /> Analytical FAX (408) 782-6308 <br /> ATC Associates Inc -Modesto Project - Sampled 12/28/99 <br /> 1117 Lone Palm Avenue Project Number Gardner Property 54 62582 Received 12/29/99 <br /> Modesto, CA 95351-1502 Project Manager Jeanne Homsey Reported 117/00 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFTIQualtty Control <br /> Sequoia Analytical-Morgan Hill <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 00100E6 Date Pre ai ed 1 4100 Extraction Method EPA S030B IP/fl <br /> Blank 0010086-BLK1 <br /> Purgeable Hydrocarbons 1/4100 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 /> Surrogate aaa-Trifheorotohaene 10 0 9 75 70 0-130 975 <br /> LC S 0010086-BSI <br /> Purgeable Hydrocarbons _ 1/4/00 250 __- - _252 __ ug/l 700-130 101 <br /> Surrogate a a a-Trifluorotoluene 100 752 700-130 75 2 <br /> Matrix Spike 0010086-MSI M912960-04 <br /> Wrgeable Hydrocarbons 1/4/00 250 ND 240 ug/1 _ 600-140 960 <br /> rrogate a a a-Trifluorotoh,ene 11100 7 79 700-130 779 <br /> Matrix Spike Dup 0010086-MSD1 M912960-04 <br /> Purgeable Hydrocarbons 1/4/00 250 ND 230 ug/1 600-140 920 25 0 426 <br /> Surrogate a a a-Trefluorotoluene 100 733 700-130 73 3 <br /> 0- --- <br /> Sequoia Analytical -Morgan Hill *Refer to end of report for text of notes and definitions <br /> Page 3 of 4 <br />