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s <br /> • 28 February 2005 <br /> AGE-NC Project No 99-0624 <br /> Page 7 of 12 <br /> with 8 25-inch hollow-stem augers The total depth of each well boring may vary according to <br /> hydrogeologic/geologic conditions encountered during drilling <br /> Soil samples will be collected from within the hollow-stem augers at five-foot intervals using a <br /> California split-spoon sampler and brass sleeves Selected soil samples will be analyzed by a State <br /> of California DHS-certified laboratory for the following constituents <br /> • TPH-g in accordance with EPA Method 8015 Modified,' <br /> • Volatile aromatic hydrocarbons BTEX in accordance with EPA Method 8260, and <br /> • Oxygenated compounds di-isopropyl ether(DIPE),ethyl tertiary butyl ether(ETBE),MTBE, <br /> tertiary amyl methyl ether(TAME),tertiary butanol (TBA), ethylene dibromide (EDB) and <br /> 1,2-D ichloro ethane (1,2-DCA) in accordance with EPA Method 8260 <br /> Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report of <br /> findings <br /> 4 3 MONITORING WELL INSTALLATION, DEVELOPMENT AND SURVEY <br /> The pilot borings will be completed as single-level ground water monitoring wells, screened from <br /> 45 to 65 feet bsg Following installation, each well will be developed to maximize water flow and <br /> minimize the amount of fine-grained sediment drawn into the well during pumping or bailing, and <br /> the top of each existing and newly installed well casing (well head) will be surveyed to determine <br /> its elevation relative to mean sea level Procedures for well installation, development and survey <br /> were presented in AGE's Site Assessment Work Plan, prepared and submitted to EHD in November <br /> 2004 <br /> 4 4 GROUND WATER SAMPLING AND ANALYSIS <br /> Following the installation of the new monitoring wells, ground water monitoring and sampling <br /> activities will be conducted for all the monitoring wells on a quarterly basis for a minimum of one <br /> year (four sampling events), monitoring activities will include recording depth to ground water <br /> measurements and collection of ground water samples for laboratory analysis by a DHS-certified <br /> laboratory for the analytes noted in Section 4 2 Ground water sample collection protocols were <br /> described in the AGE prepared Preliminary Site Assessment Work Plan dated 30 June 1999 <br /> Laboratory reports for ground water analyses,testing methods,laboratory QA/QC reports and sample <br /> Advanced CeoEnwronmental,Inc <br />