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404 N.WlgetLane <br /> ` Sequoia Walnut Creek, 94598 <br /> (925)98 8-9600 <br /> FAX(925)988-9673 <br /> Analytical <br /> www.sequolalabs.com <br /> ' 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 24-May-00 14:51 <br /> i <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> i:.-_:+Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OD28002-EPA 5030B [MeOH] <br /> plank(OD28002-BLK1) Prepared&Analyzed:28-Apr-00 <br /> Purgeable Hydrocarbons ND 1.0 mg/kg <br /> Benzene ND 0.0050 " <br /> h:floluene ND 0,0050 " <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 <br /> un•ogate:a,a,a-Trifluorololuene 0.652 0.600 109 40-140 <br /> LCS(QD28002-BS1) Prepared&Analyzed:28-Apr-00 <br /> Benzene 0.676 0.0050 mglkg 0.800 64,5 50-150 <br /> �-a <br /> l-_. <br /> Toluene 0.732 0.0050 0.800 91.5 50.150 <br /> Ethylbenzene 0.806 0.0050 0.800 101 50-150 <br /> r-7:vlenes(total) 2.40 0,0050 " - 2.40 100 50-150 <br /> yate:a,a,a-Triuoroiolueue 0.710 0.600 118 40-140 <br /> Matrix Spike(OD28002-MSI) Source: W004539-30 Prepared&Analyzed:28-Apr-00 <br /> F:::jl3cnzene 0.746 0.0050 mg/kg 0.800 ND 93.2 50-150 <br /> ':.Toluene 0,802 0,0050 0.800 ND 100 50-150 <br /> Ethylbenzene 0.864 0.0050 0.800 ND 108 50-150 <br /> !..xgenes(total) 2.55 0.0050 2.40 ND 106 50-I50 <br /> =-Surrogate:a,a,a-Truarotoluerre 0.672 " 0.600 112 40-140 <br /> Matrix Spike Dup (OD28002-MSD1) Source:W004539-30 Prepared&Analyzed:28-Apr-00 <br /> benzene 0.758 0.0050 mg/kg 0,800 ND 94.8 50.150 1.60 20 <br /> �— Toluene 0.818 0.0050 0.800 ND 102 50-150 1.98 20 <br /> Etbylbenzene 0.878 0.0050 0.800 ND 110 50-150 1.61 20 <br /> �ylenes(total) 2.59 0.0050 ". 2.40 ND 108 50-150 1.56 20 <br /> —I I <br /> =--Surrogate:a,a,a-Try7uorotolueue 0.672 " 0,600 112 40-140 <br /> i <br /> SPauoia Analytical-Walnut Creek The results in Ihis report apply to the samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> s <br /> Page 20 of 28 <br />