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15 January 2007 <br /> AGE-NC Project No. 99-0669 <br /> Page 4 of 10 <br /> ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) by EPA Method 8260 <br /> modified. <br /> A selected set of soil samples may also be analyzed for geotechnical parameters, including: <br /> • Specific gravity (including soil moisture), porosity/permeability and total organic carbon <br /> (TOC), in accordance with ASTM Methods D854, D5084 and D2974, respectively. <br /> Laboratory reports for soil and ground water analysis, testing methods, laboratory quality <br /> assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be <br /> presented in a report with findings and recommendations. <br /> 2.3. WELL DEVELOPMENT AND SURVEY <br /> Following well installations,each well will be developed to maximize water flow and minimize the <br /> amount of fine-grained sediment drawn into the well during pumping or bailing.After development, <br /> the top of each well casing(well head)will be surveyed to determine its elevation relative to mean <br /> sea level and global positioning system (GPS)coordinates, for submittal to the State of California <br /> GeoTracker database. Procedures for well development and survey are presented in Section 3.1.2. <br /> 2.4. GROUND WATER SAMPLE COLLECTION AND ANALYSIS <br /> All newly-installed wells will be incorporated into the ongoing quarterly ground water monitoring <br /> program at the site. Ground water monitoring will include recording depth to ground water <br /> measurements, properly purging ground water monitoring wells and collection of ground water <br /> samples. Procedures for ground water sample collection are presented in Section 3.1.3. <br /> Ground water monitoring well samples will be analyzed by a DHS-certified laboratory for the <br /> following constituents: <br /> • TPH-g in accordance with EPA Method 8015 Modified; <br /> • BTEX in accordance with EPA Method 826013; and <br /> • Fuel additives including DIPE, ETBE, MTBE, TAME, TBA, ethanol, methanol, EDB and <br /> 1,2-DCA in accordance with EPA Method 8260B. <br /> Laboratory reports for ground water analyses,testing methods,laboratory quality assurance/quality <br /> Advanced GeoEnviron mental,Inc. <br />