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22 March 2002 <br /> AGE-NC Project No. 02-0912 <br /> Page 2 of 3 <br /> The three soil borings will be advanced to approximately 50 feet bsg for collection of soil and grab <br /> ground water samples. Soil samples will be collected at 5-foot intervals beginning at 10 feet bsg to <br /> 30 feet bsg; soil samples will collected below 30 feet bsg at the discretion of field personnel. Grab <br /> ground water samples will be collected using a Geoprobe water sampling assembly, Soil and ground <br /> water samples will be collected into appropriate containers for analyses and will be analyzed by a <br /> DHS-certified laboratory for: <br /> • TPH-g by EPA Method 8015 Modified; and <br /> • BTEX and MTBE by EPA Method 8020. <br /> Selected ground water samples will also be analyzed for volatile organic compounds (VOCs) in <br /> accordance with EPA Method 8260. <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 />