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Sequoia 1551 nal Road <br /> San Carlos CAA 94070-4111 <br /> 4094070-41!1 <br /> (650) 232-9600 <br /> Analytical <br /> FAX(650) 232-9612 <br /> Blame Tech Semees Project Blaine Project(2) Sampled 7/9/99 <br /> 1680 Rogers Avenue Project/dumber 990709-M1,341 East Main St,Ripon Received 7/9/99 <br /> San Jose,CA 95112 Pro ect Manager Ann Pember R orted 7/26/99 <br /> Total Purgeable Hydrocarbons(C6-Cl2),BTEX and MTBE by DHS LUFTlQuality 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 9070049 Date Prepared _7114/99 Extraction Method EPA 5030B IP/Tl <br /> Blank 9070049-BLKI- <br /> Purgeable Hydrocarbons as Gasoline 7/14/99 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 tent-butylether _ " ND it Soo _ <br /> Surrogate a,a,a-Trtfluorotoluene 100 101 700-130 101 T <br /> LCS 9070049-BSI <br /> Benzene 7/14/99 100 8 70 ug/1 700-130 870 <br /> Toluene too 795 700-130 795 <br /> Ethylbenzene 100 770 " 700-130 770 <br /> -XZenes(total) 300 272 700-130 907 <br /> gate a a,a-Trrfluorotoluene 100 941 700-130 941 <br /> Matrix Spike 9070049-MSI <br /> Benzene 7/14/99 100 824 119/1 600-140 824 <br /> Toluene it 100 752 It <br /> 600-140 75 2 <br /> Ethylbenzene 100 730 600-140 730 <br /> xylenes(total) _ _ _ " 300 251 " 600-140 837 <br /> Surrogate a,a,a-Triuorotoluene " /00 918 700-130 918 <br /> Matrix Spike Duo 9070049-MSD/ <br /> Benzene 7/14/99 100 8 36 ug/l 600-140 83 6 250 145 <br /> Toluene 10 0 749 it 600-140 749 250 0 399 <br /> Ethylbenzene 100 743 It 600-140 743 250 177 <br /> Xylenes(total) " 300 248 600-140 82 7 250 120 <br /> Surrogate a,a,a-Trfluorotoluene 77100 826 700-130 82 6 <br /> 1 <br /> uaia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 4 of 6 <br />