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' 680 Chesapeake Drive Redwood City CA 94063 650 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd Horth Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carfos, CA 94070-4111 (650)232-9600 FAX(650)232 9612 <br /> Sequoia-Redwood City Protect Kayvan Kimyai Sampled 4/22/99 <br /> 680 Chesapeake Drive Project Number 9904938(ATC_1) Received 4/23/99 <br /> Redwood City,CA 94063 - Project Manager KayvanK.imyai Reported 5/3/99 <br /> Total Purgeable Hydroralrbons( CIand2)` BTEX by DHS LI3FT/Quality Control -- - - <br /> - �Serquoia Analytical-San_Carlas -- - --- <br /> Date <br /> --Date Spike Sample QC Reporting Lint Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Lima % Notes* <br /> Matrix Spike 9040145-MSI <br /> Purgeable Hydrocarbons as Gasoline 4/29/99 250 ND ug/1 600-140 <br /> Surrogate a a a-Tnfluorotoluene 100 ND IF 600-140 NR 2 <br />,Matrix Spike Dup 9040145-MSDI <br /> Purgeable Hydrocarbons as Gasoline 4/29/99 250 ND ug/l 600-140 25 0 <br /> Surrogate a a a-Tnfluorotoluene It10 0 ND It60 0-140 NR 2 <br />'Batch 9040146 Date Prepared 4/29/99 Extraction Method EPA 5030B (P/T1 <br /> Blank 9040146-BLK1 <br />,Purgeable Hydrocarbons as Gasoline 4/29/99 ND ug/1 50 0 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0.500 <br /> JhWes(total) ND 0 500 <br /> IpWgate a a a-Tnfluorotoluene 100 9 52 600-140 95 2 <br /> LCS 9040146-BS1 <br /> Purgeable Hydrocarbons as Gasoline 4/29/99 250 224 ug/l 700-130 896 <br /> Surrogate a,a,a-Tnfluorotoluene It 100 934 of 600-140 93 4 <br /> Matrix Sink e 9040146-MSI L904303-04 <br /> Purgeable Hydrocarbons as Gasoline 4/29/99 250 157 344 ug/1 600-140 748 <br /> Surrogate a,a,a-Tnfluorotoluene 160 111 It <br /> 600-140 111 <br /> Matrix Srijke Dup 9040146-MSDI L904303-04 <br /> Purgeable Hydrocarbons as Gasoline 4/29/99 250 157 330 ug/l 600-140 692 250 778 <br /> Surrogate a,a,a-Ti7fluorotoluene If <br /> 100 9 79 11 600-140 979 <br /> Batch 9040147 Date Prepared 4/29/99 Extraction Method- EPA 5030B 1P/Tl <br /> Blank 9040147-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 4/29/99 ND ug/1 50 0 <br /> en2ene ND 0 500 <br /> tBoluene <br /> ND 0 500 <br /> Ethylbenzene ND " 0 500 <br /> Xylenes(total) " ND 0 500 <br /> arrogate a,a a-Tris luorotoluene 100 863 600-140 863 <br /> LCS 9040147-BSI <br /> Purgeable Hydrocarbons as Gasoline 4/29/99 250 218 ug/l 700-130 872 <br /> arrogate a a,a-Tnfluorotoluene 100 100 10600-140 100 <br /> equoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 8 of 10 <br />