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885 laivis95037 <br /> Drive <br /> Morgan HIII. 77 -%W <br /> .. <br /> Sequoia (4Da)776-9600 <br /> FAX(408)782-6308 <br /> Analytical www.se9aolalabs.com <br /> VOW <br /> URS Corporation h) Project: ARCO#434 ML10617 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#434 Reported: <br /> Sacramento CA,95833 Project Manager: Vern Elarth 11/19/02 05:43 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2100339-EPA 3050B <br /> Blank(2100339-BLKI) Prepared: 10/23/02 Analyzed: 10/24/02 <br /> Lead ND 2.5 mg/kg <br /> Laboratory Control Sample(2100339-BSI) Prepared: 10/23/02 Analyzed: 10/24/02 <br /> Lead 52.0 2.5 mg/kg 50.0 104 80-120 <br /> Matrix Spike(2100339-MS1) Source:5210363-01 _Prepared: 10/23/02 Analyzed: 10/24/02 <br /> Lead 220 10 mg/kg 50.0 180 80 80-120 <br /> Matrix Spike Dup(2100339-MSDI) Source:5210363-01 Prepared: 10/23/02 _Analyzed: 10/24/02 _ <br /> Lead 220 10 mg/kg 50.0 180 80 80-120 0 20 <br /> Sequoia Analytical-Morgan Hill 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 its entirety. <br /> 10 of 12 <br />