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L 0 H ESI <br />ENVIRONMENTAL LABS <br />500 Giuseppe Court, Suite 9 <br />Roseville, CA 95678 <br />Phone#: (916) 773-3664 Fax#: (916) 773-4784 <br />ANALYSIS REPORT <br />Attention: Mr. Noel Lerner <br />Date Sampled: <br />Helmick & Lerner. Inc. <br />Date Received: <br />1620 Executive Court <br />MTBE Analyzed: <br />Sacramento, CA 95864 <br />BTEX Analyzed: <br />TPHg Analyzed: <br />Project: 00811/Stockton Unified School District <br />Matrix: <br />01-03-97 <br />01-03-97 <br />01-06-97 <br />01-06-97 <br />01-06-97 <br />Ethyl- Total <br />MTBE Benzene Toluene benzene Xylenes TPHg <br />PPM PPM PPM PPM PPM PPM <br />Reoortine Limit: 0.150 0.150 0.150 0.150 0.150 15 <br />SAMPLE <br />Laboratory Identification: <br />0635 ND ND ND ND 1.71 691 <br />50197044 <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 />Note: BTEX reporting limit was raised due to high concentration of non -target analyte. <br />Soil <br />ANALYTICAL PROCEDURES <br />MTBE-- Methyl tert-Butyl Ether is measured by extraction using EPA Method 5030 followed by analysis using EPA Method 8020 which utilizes a <br />gas chromatograph (OC) equipped with a photoionization detector (PID). <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 />TPHg—Total petroleum hydrocarbons as gasoline (low to medium boiling points) are measured by extraction using EPA Method 5030, followed by <br />modified EPA Method 8015 which utilizes a GC equipped with a FID. <br />01-07-97 <br />ab ratory epresentative Date Reported <br />EXCELCHEM ENVIRONMENTAL LABS IS CERTIFIED BY THE STATE OF CALIFORNIA <br />DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br />(Certification Na 1760, 2119) <br />