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EXCELCHEM <br /> ENVIRONMENTAL LASS <br /> 500 Giuseppe Court, Suite 9 a <br /> Roseville, CA 95678 <br /> Phone#: (916) 773-3664 Fax#: (916) 773-4784 <br /> OA/OC REPORT <br /> Attention: Mr. Noel Lerner Date Analyzed: 09-03-97 <br /> Helmick&Lerner,Inc. Matrix: Soil <br /> 1620 Executive Court <br /> Sacramento, CA 95864 <br /> Project: 00815/Stockton Unified <br /> LCS/LCSD RECOVERIES Unit=mg\Kg <br /> EPA Spike LCS% LCSD% % <br /> Element Method Conc. LCS Recovery LCSD Recovery RPD <br /> Cd 7130 10 11 110% 11 110% 0% <br /> Cr 7190 20 20 100% 22 110% 10% <br /> Pb 7420 20 22 110% 22 110% 0% <br /> Ni 7520 20 20 100% 18 90% 11% <br /> Zn 7950 10 11 110% 10 100% 10% <br /> Samples were digested using EPA Method 3050A. <br /> ppm=parts per million=mg/Kg=milligram per kilogram <br /> ND =Not detected. Compound(s)may be present at concentrations below the reporting limit. <br /> 09-08-97 <br /> tT <br /> ryR sentative Date Reported <br /> EXCELCHEM ENVIRONMENTAL LABS 5 CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Certification No.2119) <br /> 11 <br />