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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 <br /> Phone#: (916) 773-3664 Fax#: (916) 773-4784 <br /> QA/QC REPORT <br /> Attention: Mr.Noel Lerner Date Analyzed: 01-03-96 <br /> Helmick&Lemer, Inc. Matrix: Soil <br /> 1620 Executive Court <br /> Sacramento, CA 95864 <br /> F_1' <br /> Project: Stockton Unified School District <br /> TPHd <br /> PPM <br /> j <br /> Reporting Limit: 1.0 <br /> QA/QC PARAMETER <br /> Matrix Blank ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 75% <br /> : :1 <br /> >'J Matrix Spike Duplicate 77% <br /> ppm=parts per million—mg/Kg=milligram per kilogram <br /> =:=_} ND=Not detected. Compowld(s)may be present at concentrations below the reporting limit. <br /> Spikes&Spike Duplicates were each spiked with 5000 ug of diesel standard. <br /> i==� ANALYTICALPROCEDURES <br /> .'."1 <br /> TPHd--Total petroleum hydrocarbons as diesel(high bailing points)are measured by extraction using EPA Method 3550,followed by modified EPA <br /> Method 8015,with direct sample uljection into a GC equipped with an FID. <br /> 01-06-97 <br /> a oratory Representative Date Reported <br /> i <br /> FXCELCHEM ENVIRONMENTAL LABS 15 CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASH TESTING LABORATORY <br /> `'j (Certification No.1760,2119) <br />