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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 484 N Wiget[ane 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 /> %W-F 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 /> ame Tech Services Project Shell(1) Sampled 4/15/99 <br /> 1680 Rogers Avenue Project Number Shell 2575 Country Club Blvd, Stockton Received 4/16/99 <br /> San Jose,CA 95112 Project Manager Fran Thee Reported 5/6/99 <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 L►mtt Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9040104 Date Prepared 4/21/99 Extraction Method EPA 5030B L� <br /> Blank 9040104-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 4/21/99 ND ug/l 500 <br /> Benzene " ND 0 500 <br /> Toluene if ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND Soo <br /> Surrogate a,a,a-Tnfluorotoluene 100 993 700-130 993 <br /> LCS 9040104-BSI <br /> Purgeable Hydrocarbons as Gasoline 4121/99 250 221 ug/1 700-130 884 <br /> Surrogate a,a,a-Trrfluorotoluene If 100 166 700-130 166 1 <br /> Matrix Smoke 9040104-MSI <br /> Wouable Hydrocarbons as Gasoline 4/21/99 250 200 ug/1 600-140gate a a,a-Trifluorotoluene of 100 656 700-130 NR I <br /> Matrix Spike Duo 9040104-MSDI <br /> Purgeable Hydrocarbons as Gasoline 4/21/99 250 200 ug/l 600-140 250 <br /> Surrogate aa a-Trifluorotoluene 11100 ND if 700-130 NR 1 <br /> Batch 9040106 Date Prepared 4/21/99 Extraction Method EPA 5030E IP/TI <br /> Blank 9040106-BLKI <br /> Purgeable Hydrocarbons as Gasoline 4121/99 ND ug/1 Soo <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 100 999 IF 700-130 999 <br /> LCS 9040106-BSI <br /> Purgeable Hydrocarbons as Gasoline 4/21/99 250 205 ugil 700-130 820 <br /> Surrogate a,a,a-Tnfluorotoluene IF100 102 if 700-130 102 <br /> Matrix Spike 9040106-MSI L904186-07 <br /> Purgeable Hydrocarbons as Gasoline 4/21199 250 ND 224 ug/I 600-140 896 <br /> Surrogate a a a-Triuorotoluene IF <br /> 100 101 if 700-130 101 <br /> Matrix Spike Dua 9040106-MSD1 L904186-07 <br /> Purgeable Hydrocarbons as Gasoline 4/21/99 250 ND 231 ug/l 600-140 924 250 308 <br /> pia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 22 of 32 <br />