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404 N.Wlget Lane <br /> Sequoia Walnut Creels,CA 94598 <br /> (925)968-9600 <br /> Analytical www.sequoialabs.com(925)988-9673 <br /> wwequoialabs.coabs.cDm <br /> �f= Y <br /> i San Joaquin Company Inc. Project: 7500 W 11th St.Steet Tracy <br /> 1120 Hollywood Ave.No.3 Project Number: # 9902.012 Reported: <br /> Oakland CA.,94602 Project Manager: Dai Watkins 11-May-00 16:38 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX 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 OD25003-EPA 5030B [PIT] <br /> -r1Iatrix Spike(OD25003-MSI) Source:W004300-02 Prepared:25-Apr-00 Analyzed:26-Apr-00 <br /> Benzene 19.3 0.50 ugll 20.0 ND 96.5 70-130 <br /> T,bluene 19.6 0.50 20.0 ND 98.0 70-130 <br /> thylbonzene 19.6 0.50 " 20.0 ND 98.0 70-130 <br /> xylenes(total) 56.7 0.50 60.0 ND 94.5 70-130 <br /> Surrogate:a,a.a-Tris luorololuene 27.0 30.0 90.0 70430 <br /> .i <br /> Matrix Spike Dup (OD25003-MSD 1) Source:W004300-02 Prepared:25-Apr-00 Analyzed:26-Apr-00 <br /> Benzene 20.6 0.50 ug/l 20.0 ND 103 70-130 6.52 20 <br /> Toluene 20.8 0.50 20.0 ND 104 70-130 5.94 20 <br /> �,;thylbenzene 20,8 0.50 20.0 ND 104 70-130 5.94 20 <br /> Xylenes(total) 60.1 0.50 60.0 ND 100 70-130 5.82 20 <br /> 7,,•7_rgate:a,a,a-Trifluorotoluene 27.0 " 30.0 90.0 70-130 <br /> lrrr" ch OD27002-EPA 5030B [MeOH] <br /> Blank(OD27002-BLKI) Prepared&Analyzed:27-Apr-00 <br /> 1' '1 urgeable Hydrocarbons ND 1.0 mg/kg <br /> Benzene ND 0.0050 " <br /> Toluene ND 0,0050 " <br /> 11thylbenzene ND 0.0050 " <br /> `Xylenes(total) ND 0.0050 " <br /> Surrogate.'a,a,a•Tri,Jluorololuene 0.618 " 0.600 103 40-140 <br /> LCS(OD27002-BSI) Prepared&Analyzed:27-Apr-00 <br /> Benzene 0.680 0.0050 mg/kg 0.800 85.0 50-150 <br /> Toluene 0.740 0.0050 0.800 92.5 50-150 <br /> gthylbemmne 0.814 0.0050 0.800 102 50-150 <br /> kylenes(total) 2.39 0.0050 2.40 99.6 50-150 <br /> Surrogate:a,a,a-TrYluorotoluene 0.772 " 0.600 129 40-140 <br /> --1 <br /> G-lioia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> j custody document.This analytical report must be reproduced in its entirely, <br /> Page 17 of 22 <br />