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• S <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9133 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(9Z5)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9 16)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma C4 94954 (707)792-1865 FAX(707)79Z-034Z <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 Allen Reported 4/23/99 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUTFTIQuahty 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 9040084 Date Prepared 4/16/99 Extraction Method EPA 5030B 1P/Tl <br /> Blank 9040084-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 4/16/99 ND ug/1 50 0 <br /> Benzene 10 ND 0 500 <br /> Toluene " ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate a,a,a-Triuorotoluene 11 100 9 32 600-140 932 <br /> LCS 9040084-BSl <br /> Benzene 4/16/99 100 101 ug/1 700-130 101 <br /> Toluene it 100 101 1. 700-130 101 <br /> Ethylbenzenc It <br /> 100 101 " 700-130 101 <br /> Xylenes(total) " 300 305 " 700-130 102 <br /> gate a,a,a-Tnfluorotoluene 1, 100 899 to 600-140 899 <br /> Matrix Spike 9040084-MS1 L904115-07 <br /> Benzene 4/16/99 100 ND 105 119/1 600-140 105 <br /> Toluene too ND 101 " 600-140 101 <br /> Ethylbenzene 100 ND 103 It <br /> 600-140 103 <br /> Xylenes(total) 300 ND 307 600-140 102 <br /> Surrogate a a a-Triuorotoluene 11100 101 600-140 101 <br /> Matrix Spike Du p 9040084-MSD1 L904115-07 <br /> Benzene 4/16/99 100 ND 9 74 ug/l 600-140 974 25 0 7 51 <br /> Toluene 100 ND 956 1. 600-140 95 6 25 0 549 <br /> Ethylbenzene 100 ND 9 51 " 600-140 95 1 250 798 <br /> Xylenes(total) 300 ND 285 It 600-140 950 250 7 11 <br /> Surrogate aa a-Tnfluorotoluene 100 941 It 600-140 941 <br /> Batch 9040088 Date Prepared 4/19199 Extraction Method EPA 5030E 1P/T1 <br /> Blank 9040088-BLKI <br /> Purgeable Hydrocarbons as Gasoline 4119/99 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-Tnfluorotoluene 100 9 60 600-140 960 <br /> LCS 9040088-BSI <br /> Purgeable Hydrocarbons as Gasoline 4/19/99 250 227 ug/l 700-130 908 <br /> rogate a a a-Trifluorotoluene ey 100 14 9 TP 600-140 149 5 <br /> equoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 6 of 10 <br />