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„1 Sequoia 1551 Industrial Road <br /> San Carlos CA 94070-411 1 <br /> (650) 232-9600 <br /> Analytical <br /> FAX(650) 232-9612 <br /> ATC Associates,Inc(I) Project ATC Projects Sampled 611/99 <br /> 11 l7 Lone Palm Ave,Suite B Project Number Ripon USD/13009 0001 Received 6/2/99 <br /> Modesto,CA 95351 Project Manager Drew Van Allen Reported 6/17199 <br /> Notal Pnrgeable Hyiirocirl;6us(C6-C12}ii'd BTEX,byDHS LUFUQuahty Control Y <br /> Seqnis____ ;n J_ �cal,-_San Carlos, <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9060066 Date Prepared 6/11/99 Extraction Method EPA 5030B 1P/Tl <br /> Blank 9060066-BLKI <br /> Purgeable Hydrocarbons as Gasoline 6/11/99 ND ug/1 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> _Xylenes(total) ND 0 500 <br /> Surrogate a,a,a-Tnfluorotaluene 100 988 600-140 988 <br /> LCS 9060066-BSI <br /> Benzene 6/11/99 100 100 ug/1 700-130 100 <br /> Toluene 100 9 91 ” 700-130 991 <br /> Ethylbenzene too 994 It <br /> 700-130 994 <br /> Xylenes(total) 300 302 700-130 101 <br /> 0atr <br /> ogate a a,a-Tnfluorotaluene 100 919 600-140 919 <br /> ix Spike 9060066-MSI <br /> Benzene 6/11/99 100 ND 942 ug/l 600-140 942 <br /> Toluene 100 ND 9 17 11600-140 917 <br /> Ethylbenzene 100 ND 9 18 600-140 918 <br /> Xylenes(total) 300 ND 277 600-140 924 <br /> Surrogate a,a,a-Trifluorotoluene or 100 893 600-140 893 <br /> Matrix Spike Dup 9060066-MSDI <br /> Benzene 6/11/99 100 ND 978 ug/1 600-140 978 25 0 375 <br /> Toluene to 100 ND 955 " 600-140 955 250 406 <br /> Ethylbenzene to 100 ND 956 " 600-140 956 250 406 <br /> Xylenes(total) it 300 ND 288 600-140 960 250 389 <br /> Surrogate a,a a-Trifluorotoluene to 100 880 600-140 880 <br /> uoia Analytical- San Carlos *Refer to end of report for text of notes and definitions <br /> Page 5 of 6 <br />