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O -' 5' <br /> 5'ON <br /> �� -'TCH <br /> Analytl"rt� / Laboratory CERTIFICATE OFANALYSIS <br /> Monday,December 12,2011 <br /> Attention: Jay Visconti <br /> Northwood Properties Report Page 19of23 <br /> 324 Manhatton Beach Blvd <br /> Manhatton Beach, CA 966634 <br /> Metals by EPA 6000/7000 Series Methods-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AL 10706-General Preparation <br /> Blank(AL10706-BLKI) Prepared&Analyzed:07-Dec-11 <br /> Chromium(VI) ND 0.0500 mg/kg <br /> LCS(AL10706-BSI) Prepared&Analyzed:07-Dec-I 1 <br /> Chromium(VI) 1.00 0.0500 mg/kg 1.00 100 80-120 <br /> Matrix Spike(AL10706-MSI) Source:1120702-09 Prepared&Analyzed:07-Dec-11 <br /> Chromium(VI) 1.04 0.0500 mg/kg 1.00 ND 104 75-125 <br /> Matrix Spike Dup(AL10706-MSDI) Source:1120702-09 Prepared&Analyzed:07-Dec-11 <br /> Chromium(VI) 0.960 0.0500 mg/kg 1.00 ND 96 75-125 8 20 <br /> Batch AL11201-EPA 3050B Units <br /> Blank(AL11201-BLK1) Prepared&Analyzed: 12-Dec-1 I <br /> Vanadium ND 0.0100 mg/kg wet <br /> Antimony ND 0.0100 " <br /> Arsenic ND 0.0100 " <br /> Barium ND 0.0100 " <br /> Beryllium ND 0.0100 " <br /> Cadmium ND 0.0100 " <br /> Chromium ND 0.0100 " <br /> Cobalt ND 0.0100 " <br /> Copper ND 0.0100 " <br /> Lead ND 0.0100 " <br /> Mercury ND 0.100 " <br /> Molybdenum ND 0.0100 " <br /> Nickel ND 0.0100 " <br /> Selenium ND 0.0100 " <br /> Silver ND 0.0100 " <br /> Thallium ND 0.000200 " <br /> Zinc ND 0.100 " <br /> mg L=milligrams per Liter=ppm DLR=Detection Limit for Purpose of Reporting. <br /> ug L-micrograms per Liter=ppb exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 3935 N. Coronado Ave Stockton CA. 95204 nhone: (2091 4"7-8105 Fax: (209)546-7497 <br />