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i • <br /> uo@R laboratories <br /> Ground Zero Analysis,Inc. Project Number: 335 <br /> 1714 Main Street Project Name: Tuff Boy Work Order No.: <br /> Bscalon,CA 95320 Project Manager: John Lane G606077 <br /> Total Lead by Flame AA EPA Method 7420-Quality Control <br /> Argon Laboratories <br /> Reporting Spike Source %REC RPD <br /> Analyte Result. Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch GPGO054-EPA 3050B <br /> Blank(GPG0054-BLKI) Prepared&Analyzed:05-Jul-06 <br /> Lead ND 5.0 mg/kg <br /> LCS(GPG0054-BSI) Prepared&Analyzed:6-Jul-06 <br /> Lead 8.08 mg/kg 8.00 101 70-130 <br /> Matrix Spike(GPG0054-MSI) Source:G606077-01 Prepared&Analyzed:05-Jul-06 <br /> Lead 7.70 mg/kg 8.00 ND 96 70-130 <br /> Matrix Spike Dup(GPG0054-MSD1) Source:G606077-01 Prepared&Analyzed:05-Jul-06 <br /> Lead 7.10 mg/kg 8.00 ND 89 70-130 8 20 <br /> Approved By <br /> Argon Laboratories,Inc. California D.O.H.S.Cert.#2359 <br /> 2905 Railroad Avenue, Ceres, CA 95307 * Phone (209) 581-9280 • Fox (209) 581 -9282 page 4 of <br /> �� ernoil: info@argonlabs.com <br />