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EXCELCHEM <br />ENVIRONMENTAL LABS <br />500 Giuseppe Court, Suite 9 <br />Roseville, CA 95678 <br />Phonek (916) 773-3664 Fax#: (916) 773-4784 <br />ANALYSIS REPORT <br />Attention: Mr. Noel Lerner Date Sampled: <br />Helmick & Lerner, Inc. Date Received: <br />1620 Executive Court BTEX Analyzed: <br />Sacramento, CA 95864 TPHd Analyzed: <br />Project: 00811/Stockton Unified School District Matrix: <br />01-03-97 <br />01-03-97 <br />01-03-97 <br />01-06-97 <br />Ethyl- Total <br />Benzene Toluene benzene Xylenes TPHd <br />PPM PPM PPM PPM PPM <br />Rewrtine Limit: 0.005 0.005 0.005 0.005 1.0 <br />SAMPLE <br />Laboratory Identification: <br />0612 ND ND ND ND ND <br />50197021 <br />0613 ND ND ND ND ND <br />S0197022 <br />0614 ND ND ND ND ND <br />S0197023 <br />0615 ND ND ND ND ND <br />S0197024 <br />0616 ND ND ND ND ND <br />50197025 <br />Soil <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 />ANALYTICAL PROCEDURES <br />BTEX-- Benzene, toluene, ethylbenzene, and total xylene isomers (BTEX) are measured by extraction using EPA Method 5030 followed by analysis <br />using EPA Method 8020 which utilizes a gas chromatograph (GC) equipped with a photoionization detector (PID). <br />TPHd—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 />01-07-97 <br />a ratory Representative Date Reported <br />EXCELCHEM ENVIRONMENTAL LABS IS CERTIFIED BY THE STATE OF CALIFORNIA <br />DEPARTMENT OF HEAL71! SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br />(Certification No. 1760, 2119) <br />