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Sequoia <br /> Walnut <br /> N. CLane <br /> nut Creek,,CAA 94598 <br /> � Analytical (925)988-9600 <br /> FAX(925)988-9673 <br /> f�A'�ttler Ryan,Inc.-Dublin Project: Unocal <br /> -a747 Sierra Court Suite 7 Project Number: Unocal 411195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding 09-Dec-99 08:34 <br /> Total Purgeable Hydrocarbons (C6-02), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical -Walnut Creep <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-8(W911580-07)Water Sampled: 19-Nov-99 10:50 Received:22-Nov-99 16:00 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 9K29001 29-Nov-99 29-Nov-99 EPA <br /> Benzene ND 0.50 " 8015M/8020 <br /> Toluene 1.3 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes (total) 1.5 0.50 " <br /> Methyl tent-butyl ether 24 2.5 " <br /> Surrogate:a,a,a-Trifluorotoluene 103% 70-130 " <br /> MW-9(W911580-08)Water Sampled: 19-Nov-99 10:16 Received:22-Nov-99 16:00 <br /> Purgeable Hydrocarbons ND 50 ugh 1 9X29001 29-Nov-99 29-Nov-99 EPA <br /> Benzene ND 0.50 " " " 8015M/8020 <br /> Toluene 0.71 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Xylenes (total) 0.82 0.50 <br /> Methyl tert-butyl ether ND 2.5 " <br /> ,Sgrrogate:a,a,a-Trifluorotoluene 100% 70-130 " <br /> -10(W911580-09)Water Sampled: 19-Nov-99 09:42 Received:22-Nov-99 16:00 <br /> Purgeable Hydrocarbons ND 500 ug/l 10 9K29001 29-Nov-99 29-Nov-99 EPA <br /> Benzene 17 5.0 " 11 11 " 11 8015M/8020 <br /> Toluene ND 5.0 if " " <br /> Ethylbenzene ND 5.0 if " " " " " <br /> Xylenes(total) ND 5.0 if " " " 1. " <br /> Surrogate:a,a,a-Trifluorotoluene 103 % 70-130 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the smnples analyzed in accordance with the clmn of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> r Alan B.Kemp,La oratory hector Page 4 of 12 <br />