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Sequoia i Industrial Road <br /> 4D San Carloss CA 94070-4111 <br /> (650) 2.32-9600 <br /> Analytical FAX(650) 232-9612 <br /> Blame Tech Services Project Equiva(2) Sampled 9/22/99 <br /> 1680 Rogers Avenue Project Number 341 East Main St,Ripon Received 9/23/99 <br /> San Jose,CA 95112 Project Manager Ann Pember Reported 10/8/99 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DRS LUFT/Quality Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> I.Arialyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9100017 Date Prepared 10/5/99 Extraction Method_EPA 5030B [P/TJ <br /> Blank 9100017-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 10/5/99 ND ug/l 500 <br /> Benzene ND 110 500 <br /> Toluene to ND It 0 500 <br /> Ethylbenzene 1, ND 0 500 <br /> Xylenes(total) It ND 0 500 <br /> Methyl tert-butyl ether " ND toSoo <br /> Surrogate a a,a-Trrfluorotoluene 100 102 At700-130 102 <br /> LCS 9100017-BSI <br /> Benzene 10/5/99 100 861 ug/1 700-130 861 <br /> Toluene 100 846 if 700-130 846 <br /> Ethylbenzene 100 861 700-130 861 <br /> AmUwlcncq(total) 300 256 700-130 853 <br /> agate a,aa-Trifluorototuene 100 858 700-130 858 <br /> LCS 9100017-BS2 <br /> Purgeable Hydrocarbons as Gasoline 10/5/99 250 248 ug/1 700-130 992 <br /> Surrogate a a o-Tri/h.omotoltrore In 0 u 2d PF 700-170 824 <br /> Matrix Spike 9100017-MS1 L909233-01 <br /> Benzene 10/5/99 100 ND 920 ug/l 600-140 920 <br /> Toluene 100 ND 9 10 600-140 910 <br /> Ethylbenzene 100 ND 925 600-140 925 <br /> Xylenes(total) 300 ND 275 600-140 917 <br /> Surrogate a,a,a-Trifluorotoluene 100 922 700-130 922 <br /> Matrix Spike Dup 9100017-MSDI L909233-01 <br /> Benzene 10/5/99 too ND 905 ug/l 600-140 90 5 250 164 <br /> Toluene too ND 898 600-140 898 25 0 133 <br /> Ethylbenzene 100 ND 909 600-140 90 9 25 0 174 <br /> Xylenes(total) 300 ND 270 it600-140 900 250 187 <br /> Surrogate a,a,a-Tr fluorotoluene 100 851 11700-130 851 <br /> Batch 9100025 Date Prepared 10/6/99 Extraction Method EPA 5030B IP/T1 <br /> Blank 9100025-BLKI <br /> Purgeable Hydrocarbons as Gasoline 10/6/99 ND ug/l 500 <br /> Benzene " ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene IND " 0500 <br /> (total) ND 0 500 <br /> 7equoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 4 of 1 I <br />