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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)921-010 0 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232 9600 FAX (650)232-9612 <br /> ATC Associates,Inc(1) Project ATC Projects Sampled 4/7/99 <br /> 1117 Lone Palm Ave,Suite B Project Number Pacific Coast Recreation 16393 0001 Received 4/8/99 <br /> Modesto,CA 95351 Project Manager Drew Van Alien Reported 4/23199 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFT/Quahty 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 /> Matrix Spike 9040088-MSI L904115-16 <br /> Purgeable Hydrocarbons as Gasoline 4/19/99 250 ND 217 ug/1 600-140 86 8 <br /> Surrogate a a a-Tnfluorotoluene If 100 162 to 600-140 162 5 <br /> Matrix Spike Dun 9040088-MSDI L904115-16 <br /> Purgeable Hydrocarbons as Gasoline 4/19/99 250 ND 244 ug/l 600-140 97 6 250 117 <br /> Surrogate a,a,a-Tr fluorotoluene to 100 147 to 600-140 147 5 <br /> Batch 9040089 Date Prepared 4119199 Extraction Method EPA 5030B.FP/T1 <br /> Blank 9040089-BLKI <br /> Purgeable Hydrocarbons as Gasoline 4/19/99 ND ug/1 500 <br /> Benzene ND it 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzenc ND 0 500 <br /> enes(total) ND 0 500 <br /> agate a s a-Trifluorotoluene !0 0 823 600-140 823 <br /> LCS 9040089-BS1 <br /> Purgeable Hydrocarbons as Gasoline 4119199 250 233 ug/I 700-130 932 <br /> Surrogate a,a,a-Tnfluorotoluene 11 100 825 to 600-140 825 <br /> Matrix Spike 9040089-MS1 L904097-04 <br /> Purgeable Hydrocarbons as Gasoline 4/19/99 250 ND 221 ug/1 600-140 884 <br /> Surrogate a,a,a-Trifluorotoluene to 100 794 600-140 794 <br /> Matrix Spike Du p 9040089-MSDI L904097-04 <br /> Purgeable Hydrocarbons as Gasoline 4/19/99 250 ND 231 ug/I 600-140 924 25 0 442 <br /> Surrogate a,a,a-Tnfluorotoluene 100 831 600-140 831 <br /> ST-quoia Analytical--San Carlos *Refer to end of report for test of notes and definitions <br /> Page 7 of 10 <br />