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Sequoia 4�N. Nigel Lane <br /> Walnut Creek,.CA 94598596 <br /> (925)98&961X} <br /> Analytical FAX(925)988-9673 <br /> Gl www.sequolalabs.com <br /> Gerller Ryan,Inc,-Dublin Project Tosco <br /> 6747 Sierra Court Suite 1 Project Number: Tosco# 11195 Reported: <br /> Dublin CA,94568 Project Manager: Doug Lee 25-Apr-00 11:14 <br /> Total Purgeable Hydrocarbons (C6-Ci2), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Artall'te Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OD17001 -EPA 5030B[P/TJ <br /> Blank(OD17001-BLKI) Prepared&Analyzed: 17-Apr-00 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> iienzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> methylbenzene ND 0.50 " <br />.ylenes(total) ND 0.50 " <br />,icthyl tert-butyl ether ND 2.5 " <br />;arrogate:a,qa-Trifluorotoluene 27.0 30.0 90.0 70.130 <br />'..CS(OD17001-BSI) Prepared&Analyzed: 17-Apr-00 <br /> xnzene 17.0 0.50 ugfl 20.0 85.0 70-130 <br />"Oluene 17.9 0.50 20.0 89.5 70-130 <br /> utytbenzene 19.2 0.50 20.0 96.0 70-130 <br />_yltnds(total) 58.7 U-50 60.0 97.2 70-130 <br /> urrogate:ga.a-Trifl uorololuene 267 30.0 89.0 70-130 <br />,latrix Spike(OD17001-MSI) Source: W0042041-01 Prepared&s Analyzed: 17-Apr-00 <br />.cnzene 17.3 0.50 uy/i 20.0 ND 86.3 70-130 <br /> oluene 18.1 0.50 20.0 ND 90.5 70-130 <br /> thylhenzene 17.8 0.50 2U.0 ND 89.0 70-130 <br /> ylenes(total) 58.8 0.50 60.0 ND 98.0 70-130 <br /> arrogate:Qa.a-TriJluorololuene 26.7 30.0 89.0 70-130 <br /> Iatrix Spike Dup (OD17001-MSDi) Source: W004204-01 Prepared&Analyzed: I7-Apr-00 <br />,: zcne 16.2 0.50 ug/l 20,0 ND 81.0 70-130 6.57 20 <br /> uluane 17.0 0.50 " 20.0 ND 83.0 70-130 6.27 20 <br />.hylbenzene 18.3 0.50 20.0 ND 91.5 70-130 2.77 20 <br /> ylcnas(luta]) 35.8 0.50 60.0 ND 93.0 70-130 5.24 20 <br /> rrrogale:aa.a-Tryluoromluerre 25.4 30.0 84.7 70-130 <br /> xluoia Analytical- Walnut Creek Tim results in thi.v report apply to the sanrpler anal3ced in accordance with the chain of <br /> eustady document. This analytical report must be reproduced hr its entirety. <br /> Page 5 of 8 <br />