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404 N.Wlget Lane <br /> Sequoia Walnut Creek, -9600 <br /> 94598 <br /> (925)98 8-9600 <br /> FAX(925)988-9673 <br /> Analyticalwww.sequolalabs.com <br /> San Joaquin Company Inc. Project: 7500 W 11th St.Steet Tracy <br /> 1 1120 Hollywood Ave.No.3 Project Number; #9902.012 Reported: <br /> Oakland CA.,94602 Project Manager: Dai Watkins 24-May-00 15:19 <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 bevel Result %REC Limits RPD Limit Notes <br /> Itch OE02002-EPA 5030B [MeOH] <br /> !._ lank(OE02002-BLKI) Prepared&Analyzed: 02-May-00 <br /> Purgeable Hydracarbons ND 1.0 mglkg <br /> Benzene ND 0.0050 " <br /> ,Toluene ND 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> r-.-xylenes(total) ND 0.0050 " <br /> Surrogate:a,ga-Tris luorotoluene 0.628 0.600 105 40.140 <br /> LCS(OE02002-BS1) Prepared&Analyzed:02-May-00 <br /> Benzene 0.608 0,0050 mg/kg 0.800 76.0 50-150 <br /> ;Toluene 0.658 0.0050 0.800 62.2 50-150 <br /> Ethylbenzene 0.726 0.0050 0,600 90.8 50-150 <br /> h 11Q.pes(total) 2.36 0,0050 2.40 98.3 50-150 <br /> ;gate;qa,a-7Y-i wroluene 0.658 " 0.600 110 40140 <br /> Matrix Spike(OE02002-MSI) Source:W005046-02 Prepared&Analyzed:02-May-00 <br /> Benzene 0.822 0,0050 mg/kg 0.800 ND 103 50-150 <br /> ,Toluene 0.888 0.0050 0.800 ND Ill 50-150 <br /> Ethylhenzene 0.968 0,0050 0.800 ND 121 50-150 <br /> Q ylenes(total) 2.83 0.0050 2.40 ND 118 50-150 <br /> 9urrogate:a,a,a-Triuor otoluene 0.690 0.600 115 40-140 <br /> }&trix Spike Dup (0)102002-MSD 1) Source:W005046-02 Prepared&Analyzed:02-May-00 <br /> E. benzene 0.814 0,0050 mg/kg 0,800 ND 102 50-150 0.978 20 <br /> Toluene 0,890 0.0050 0.800 ND 111 50-150 0.225 20 <br /> _Ethylbenzene 0,978 0.0050 0.800 ND 122 50-150 1.03 20 <br /> 2.88 0.0050 2.40 ND I20 50-150 1.75 20 <br /> + Ylenes(total) <br /> } Surrogate:a,a,a-Truorotoluene 0.682 0.600 114 40-140 <br /> L. <br /> I <br /> i . <br /> i <br /> t <br /> F.p-1poia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in iLa entirety. <br /> 7 <br /> Page 10 of 14 <br />