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Sequoia Industrial Road <br /> San Carlos, <br /> CA 94070-4111 <br /> (650)232-9600 <br /> Analytical <br /> FAX(650) Z32-9612 <br /> Sequoia-Walnut Creek Project: Gettler-Ryan Inc./TOSCO Sampled: 8111199 <br /> 404 N. Wigett Lane Project Number: W908271/Unocal SS#1 1195, 180175.85 Received: 8118199 <br /> Walnut Creek,CA 94568 Project Manager: Julianne Fegley Reported: 8126/99 <br /> Total Purgeable,Hydrocarbons(C6-C12).HTEX and MTBE by DHS LUFTIQuality Control <br /> Sequoia Analytical-Sanc:.Carlos <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 9080102 Date Prepared: 8119/99 Extraction Method: EPA 5030B[EM <br /> Blank 9080102-BLKI <br /> Purgeable Hydrocarbons as Gasoline 8119199 ND ug/I 50.0 <br /> Benzene IF <br /> ND It <br /> 0.500 <br /> Toluene it ND It <br /> 0.500 <br /> Ethylbenzene " ND it 0.500 <br /> Xylenes(total) IF <br /> ND It <br /> 0.500 <br /> Methyl tert-butyl ether IF <br /> ND It <br /> 5.00 <br /> Surrogate: a,a,a-Trifluorotoluene " 10.0 10.7 It <br /> 70.0-130 107 <br /> LCS 9080102-BSI <br /> Purgeable Hydrocarbons as Gasoline 8/19/99 250 254 ug/l 70.0-130 102 <br /> Surrogate: a,a,a-Trifluorotoluene " 10.0 8.69 If <br /> 70.0-130 86.9 <br /> trix Spike 9080102-MS1 L908118-03 <br /> `'Ma`''�eable H drocarbons as Gasoline 8119199 250 ND 213 ugfl 60.0-140 85.2 <br /> ' dirogate: a,a.a-Triuorotoluene 10.0 7.60 70.0-130 76.0 <br /> Matrix Spike Du p 9080102-MSDI L908118-03 <br /> Purgeable Hydrocarbons as Gasoline 8119199 250 ND 249 ug/i 60.0-140 99.6 25.0 15.6 <br /> Surrogate: a,a,a-Trifluorotoluene 11 10.0 8.47 rr 70.0-130 84.7 <br /> Batch: 9080103 Date Prepared: 8119199 Extraction Method: EPA 5030E IP/Tl <br /> Blank 9080103-BLKI <br /> Purgeable Hydrocarbons as Gasoline 8119/99 ND ugll 50.0 j <br /> Benzene it ND It <br /> 0.500 <br /> Toluene " ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Methyl tert-butyl ether IF <br /> ND It <br /> 5.00 _ <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.63 IF 70.0-130 W 96.3 <br /> LCS 9080103-BSI <br /> Purgeable Hydrocarbons as Gasoline 8/19/99 250 233 ug/1 70.0-130 93.2 i <br /> Surrogate: a,a,a-Trifluorotoluene it10.0 8.30 70.0-130 83.0 <br /> i' <br /> Matrix Spike 9080103-MSI L908137-02 <br /> Purgeable Hydrocarbons as Gasoline 8119199 250 ND 249 ug/1 60.0-140 99.6 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 7.43 70.0-130 74.3 <br /> i <br /> Matrix Spike Du p 9080103-MSDI L908137-02 E <br /> Purgeable Hydrocarbons as Gasoline 8119/99 250 ND 228 ug/] 60.0-140 91.2 25.0 8.81 <br /> 15equoia Analytical-San Carlos *Refer to end of report for tett of notes and definitions. <br /> i� <br /> i` <br /> �7 Page 14 of 17 <br />