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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> . 1551 Industrial Road San Carlos, CA 94070 4111 (650)232 9600 FAX (650)232-9612 <br /> ATC Associates,Inc(1) Project ATC Projeets Sampled 4/5/99 <br /> 1117 Lone Palm Ave,Suite B Project Number Gardner Property 62586 000104 Received 4/5/99 <br /> Modesto,CA 95351 Project Manager- Tom Lutterman Reported 4/19/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-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 9040058 Date-Prepared 4112/99 Extraction Method EPA 5030E [P/T1 <br /> Blank 9040058-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 4/12/99 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 500 <br /> Surrogate a a a-Tnfluorotoluene 100 108 700-130 108 <br /> LCS 9040058-BSI <br /> Benzene 4/12/99 10 0 997 ug/1 700-130 99 7 <br /> Toluene 100 988 It <br /> 700-130 98 8 <br /> Ethylbenzene " 100 101 700-130 101 <br /> nes(total) 300 28 7 700-130 95 7 <br /> gate a a,a-Trrfluorotoluene 100 10 2 700-130 102 <br /> Matrix Strike 9040058-MSI <br /> Benzene 4/12/99 100 115 ug/l 600-140 115 <br /> Toluene it 100 112 to 600-140 112 <br /> Ethylbenzene 100 119 600-140 119 <br /> Xylenes(total) 300 33 5 600-140 112 <br /> Surrogate a,a,a-Trifluorotoluene 100 10 9 700-130 109 <br /> Matrix Spike Dup 9040058-MSDI <br /> Benzene 4/12/99 100 11 1 ug/l 600-140 111 25 0 3 54 <br /> Toluene 100 10 9 600-140 109 25 0 271 <br /> Ethylbenzene 100 11 7 600-140 117 25 0 169 <br /> Xylenes(total) 300 33 1 600-140 110 25 0 180 <br /> Surrogate a,a,a-Tnfluorotoluene 100 866 700-130 866 <br /> Batch 9040067 Date Prepared 4/13/99 Extraction Method EPA 5030B 1P/T1 <br /> Blank 9040067-BLKI <br /> Purgeable Hydrocarbons as Gasoline 4/13/99 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 /> Methyl tert-butyl ether ND 500 <br /> Surrogate a a,a-Trifluarotohiene 10 0 9 71 700-130 971 <br /> oia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 8 of 1 1 <br />