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404 N.Wiget Lane <br /> 1 Sequoia Walnut Creek, 94598 <br /> (925)98 98 8-9600-9600 <br /> FAX(925)988-9673 <br /> 11 www.sequoialabs.com Analytical wwsequoiaiabs.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 /> r 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 Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> l -8atch OD25003 -EPA 5030B [P/TJ <br /> Blank(OD25003-BLK1) Prepared&Analyzed:25-Apr-00 <br /> E-.-1 urgeable Hydrocarbons ND 50 ug/l <br /> benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> ->$thylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Triuorotoluene 30.8 30.0 103 70-130 <br /> Blank(OD25003-BLK2) Prepared&Analyzed:26-Apr-00 <br /> urgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 0.50 " <br /> ND 0.50 " <br /> �:coenzene N17 0.50 <br /> Xylenes(total) ND 0.50 " <br /> �iurrogale:a,a,a-Trifluorotoluene 31.0 30.D 103 70-130 <br /> 'US(OD25003-BS1) Prepared&Analyzed:25-Apr-00 <br /> Benzene 19.5 0.50 ug11 20.0 97.5 70.130 <br /> f->S <br /> i Toluene 20.3 0.50 20.0 101 70-130 <br /> 'Ethylbenzene 21.5 0.50 20.0 108 70-130 <br /> Xylenes(total) 61.6 0.50 60.0 103 70-130 <br /> <= urrogare:a,a,a-7WJluorotaluene 29.3 " 30.0 97.7 70-130 <br /> LCS(OD25003-BS2) Prepared&Analyzed:26-Apr-00 <br /> Benzene 20.9 0.50 ugH 20.0 104 70-130 <br /> ii �oluene 21.3 0.50 20.0 106 70-130 <br /> l thylbenzene 21.4 0.50 20.0 107 70-130 <br /> Xylenes(total) 61.7 0.50 60.0 103 70-130 <br /> -.-&urogale:a,a,a-Trifluoratoluene 29.0 " 30.0 96.7 70-130 <br /> i <br /> I <br /> r <br /> -.Zia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> f custody document. This analytical report must be reproduced in Rs entirely. <br /> i Page 16 of 22 <br />