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i <br /> 1551 Industrial /toad <br /> Sequoia San Carlos CA 94070-4111 <br /> 4 (640) 232-9600 <br /> (D <br /> woAnalytical FAX (650) 232-9612 <br /> 0 <br /> Blame Tech Services Project Equiva(2) Sampled 10/27/99 <br /> 1680 Rogers Avenue Project Number 4315 Waterloo,Stockton Received 10/29/99 <br /> San Jose,CA 95112 Project Manager Leah Davis Reported 11/12/99 <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 Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9110061 Date Prepared 11/10/99 Extraction Method EPA 50308 JPS <br /> Blank 9110061-BLKI <br /> Purgeable Hydrocarbons as Gasoline 11/10/99 ND ug/1 500 <br /> Benzene STD 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) It ND 0 500 <br /> Methyl tert-butyl etherND to500 <br /> Surrogate a,a,a-Trfluorotoluene �" 100 960 700-130 960 <br /> LCS 9110061-BSI <br /> Benzene 11/10/99 100 976 ug/1 700-130 97 6 <br /> Toluene 100 957 to700-130 95 7 <br /> Ethylbenzene 100 9 85 700-130 985 <br /> Xylenes(total) _ _ _300 288 70_0-130 96 0 <br /> Surrogate a a a-Trtfuorotoluene 100 10 8 700-130 108 <br /> LCS 9110061-BS2 <br /> Purgeable Hydrocarbons as Gasoline_ 11/10/99 250 264 ug/l 700-130 106 <br /> Surrogate a a a-Trtf uorotoluene " 100 12 3 700-130 123 <br /> Matrix Spike 9110061-MSI L910223-05 <br /> Benzene 11/10/99 100 ND 796 ug/l 600-140 796 <br /> Toluene gotoo ND 777 600-140 777 <br /> Ethylbenzene to100 ND 799 600-140 799 <br /> Xylenes(total) 300 ND 233 600-140 777 <br /> Surrogate a,a a-Trifuorotoluene 100 9 73 700-130 973 <br /> Matrix Spike Du R 9110061-MSDI L910223-05 <br /> Benzene 11/10/99 too ND 955 ug/1 600-140 95 5 250 182 <br /> Toluene too ND 930 600-140 93 0 250 17 9 <br /> Ethylbenzene 100 ND 961 600-140 961 250 184 <br /> Xylenes(total) 300 ND 283 600-140 943 25 0 193 <br /> Surrogate a,a a-Trtfluorotoluene 100 112 700-130 112 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and def nits <br /> Page 3 of 5 <br />