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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 /> OA/OC REPORT <br /> Attention: Mr. Noel Lerner Date Analyzed: 09-05-97 <br /> Helmick&Lerner, Inc. Matrix: Soil <br /> 1620 Executive Court <br /> Sacramento, CA 95864 <br /> Project: 00815/Stockton Unified <br /> TPHd <br /> PPM <br /> Reporting Limit: 1.0 <br /> QA/QC PARAMETER <br /> Matrix Blank ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 62% <br /> Matrix Spike Duplicate 71% <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 /> Spikes&Spike Duplicates were each spiked with 5000 ug of diesel standard. <br /> ANALYTICAL PROCEDURES <br /> TPHd--Total petroleum hydrocarbons as diesel(high boiling points)ace 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 /> 09-08-97 <br /> atory R resentative Date Reported <br /> EXCELCHEM ENWONMENTAL LABS 5 CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Certification No.2119) <br /> 8 <br />