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EXCEL HEM <br /> ENVIRONMENTAL LABS <br /> ON.::f <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 /> Hel nick&Lerner, Inc. Matrix: Soil <br /> 1620 Executive Court <br /> Sacramento, CA 95864 <br /> Project: Stockton Unified School District <br /> TPHd <br /> PPM <br /> Reporting Limit: 1.0 <br /> QA/QC PARAMETER <br /> Matrix Blank ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 75% <br /> Matrix Spike Duplicate 77% <br /> ppm=parts per million=mg/Kg=milligram per kilogram <br /> ND Not detected. Compounds}may be present at concentrations below the reporting limit. <br /> Spikes&Spike Duplicates were each spiked with 5000 ug of diesel standard. <br /> 1 ANALYTICAL PROCEDURES <br /> - TPSd--Total petroleum hydrocarbons as diesel(high boiling points)are measured by extraction using EPA Method 3550,followed by modified EPA <br /> Method 8015,with direct sample injection into a GC equipped with an FID. <br /> 'I <br /> 01-06-97 <br /> Lao tory Repr entative Date Reported <br /> r , <br /> EXCELCHEM ENVIRONMENTAL LABS IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMEN r OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> -- (Certification No.1760,2119) <br />