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24 January 2003 <br /> AGE-NC Project No. 03-0994 <br /> Page 2 of 3 <br /> A single soil sample will be collected from the terminal depth of each boring. <br /> Soil samples from each probe boring will be submitted for laboratory analysis. The selected soil <br /> samples will be analyzed by a State of California Department of Health Services (DHS)-certified <br /> laboratory for the following constituents: <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) by EPA <br /> Method 8015 Modified; <br /> • Benzene, toluene, ethylbenzene and total xylenes by EPA Method 8020; and <br /> • Fuel oxygenating Compounds, including methyl-tert-butyl ether (MTBE), tertiary butyl <br /> alcohol(TBA),di-isopropyl ether(DIPS),ethyl tertiary butyl ether(ETBE)and tertiary amyl <br /> methyl ether (TAME) in accordance with EPA Method 8260 Modified.. <br /> EQUIPMENT DECONTAMINATION <br /> Prior to use, all tools used for sample collection will be thoroughly rinsed with clean water after <br /> being washed with a solution of Alconox. All probing rods will be cleaned prior to advancement at <br /> each probe boring location. <br /> BORING ABANDONMENT <br /> All soil borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with a portland cement slurry from the total depth to <br /> surface grade. The EHD will be notified for grout inspection at least 72 hours prior to conducting <br /> grouting procedures. <br /> Upon completion of field work and receipt of final laboratory analysis, a report will be prepared <br /> presenting the findings of the investigation. The report will include a description of the work <br /> performed and the results of the laboratory analyses. Conclusions, applicable recommendations, <br /> maps and cross-sections will be included in the report, as well as copies of the laboratory reports, <br /> testing methods,laboratory quality assurance/quality control(QA/QC)reports,and sample chain of <br /> custody documentation. The report will be in a format acceptable to the EHD,and will be reviewed <br /> and signed by a California Registered Geologist. <br /> trh=axced CcoEuvironminta3l,Inc. <br />