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s .. <br /> 21 March 2002 <br /> AGE-NC Project No. 02-0913 <br /> Page 2 of 3 <br /> Two soil borings will be advanced to approximately 30 feet bsg in the former tank pit area and four <br /> soil borings will be advanced to 10 feet bsg near the former dispenser island area. Soil samples will <br /> be collected at 5-foot intervals beginning at 5 feet bsg to the total depth of each boring. <br /> Selected soil samples from each probe boring will be submitted for laboratory analysis. The selected <br /> soil 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) by EPA Method 8015 <br /> Modified; and <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl tertiary butyl ether <br /> (MTBE) by EPA Method 8020. <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 /> Advanced GeoEnvironmental,Inc. <br />