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404 N. <br /> Lane <br /> Sequoia WalnuCreek, IA 94598 <br /> (925)988-9600 <br /> Analytical <br /> hal FAX (925)988-9673 <br /> Gettler Ryan,Inc.-Dublin Project: Unocal <br /> 6747 Sierra Court Suite J Project Number: Unocal 411195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding 09-Dec-99 08:34 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creep <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 9K29001: Prepared 29-Nov-99 Using EPA 5030E [P/TJ <br /> Blank(9K29001-BLKI) <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0,50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether ND 2.5 " <br /> Surrogate:a,a,a-Triiluororoluene 29.9 30.0 99.7 70-130 <br /> LCS(9K29001-BSI) <br /> Benzene 20,4 0.50 ug/l 20.0 102 70-130 <br /> Toluene 20.4 0.50 20.0 102 70-130 <br /> '-41benzene 18.4 0.50 20.0 92,0 70-130 <br /> Xylenes(total) 63.6 0.50 60.0 106 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 30.5 30.0 102 70-130 <br /> Matrix Spike(9K29001-MS1) Source: W911580-07 <br /> Benzene 18.4 0.50 ug/] 20.0 ND 92.0 70430 <br /> Toluene 19.8 0.50 20.0 1.3 92.5 70-130 <br /> Ethylbenzene 18.7 0.50 20.0 ND 93.5 70-130 <br /> Xylenes(total) 58.0 0.50 60.0 1.5 94.2 70-130 <br /> Surrogate:a,a,a-Trifluorololuene 27.6 30.0 92.0 70-130 <br /> Matrix Spike Dup(9K29001-MSD 1) Source: W911580-07 <br /> Benzene 20.0 0.50 ug/] 20.0 ND 100 70-130 8.33 20 <br /> Toluene 21.6 0.50 20.0 1.3 102 70.130 9.70 20 <br /> Ethylbenzene 18.1 0.50 20.0 ND 90.5 70-130 3.26 20 <br /> Xylenes(total) 633 0.50 60.0 1.5 103 70.130 8.42 20 <br /> Surrogate:a,a,a-Trii luoratoluerte 30.4 30.0 101 70.130 <br /> /... uoia Analytical -Walnut Creek The resvlts in this report apply to tle samples analyzed i n accordance with the chain of <br /> I custody document.This analytical report must be reproduced in its entirety, <br /> r <br /> La ora ory Director Page 10 of 12 <br />