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06 February 2003 AGE-NC Project No. 98-0504 Page 5of9 • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in accordance with EPA Method 8015 Modified, • Volatile aromatic hydrocarbons.- benzene, toluene, ethyl benzene and total xylene (BTEX) in accordance with EPA Method 8020/8260 and • Oxygenated compounds:di-isopropyl ether(DIPS),ethyl tertiary-butyl ether(ETBE),methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), methanol, ethanol, ethylene dibromide (EDB) and 1,2-dichloroethane (1,7-DCA) in accordance with EPA Method 8260. Selected soil samples may also be analyzed tier intrinsic permeability,moisture content,porosity and total organic carbon (TOC) in accordance, with the appropriate EPA or ASTM methods. Laboratory reports of both soil and ground water analyses, testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be presented in a report 3.3. MONITORING WELL INSTALLATION, DEVELOPNWNT AND SURVEY The pilot borings will be completed as single-level groundwater monitoring wells screened from 25 to 45 feet bsg. Following installation, each well will be developed to maximize water flow and Minimize the amount of fine-grainer; sediment drawn into the well during pumping or bailin-, anti the top of each existing and newly installed well casing (well head) will be surveyed to determine its elevation relative to mean sea level. Procedures for well installation, development and survey are, presented in Sections 4.2. and 4.3., respectively. 3.4. GROUND WATER SAMPLING AND ANALYSIS Following the installation of the new monitoring wells, ground water monitoring and samplin0 activities will be conducted for all the monitoring wells on a quarterly basis for a minimum of one year (four sampling events); monitoring activities will include recording depth to ground water measurements and collection of ground water samples for laboratory analysis by a DIIS-certified laboratory for the analytes noted in Section 3.2. Ground water sample collection protocols are described in Section 4.4. Laboratory reports for ground wager analyses, testing methods, laboratory quality assurance/quality control (QA/QC) reports and sample.chain of custody documentation will be presented in quarteriv reports with findings and recommendations. -ids,anced Geo Environmental,Inc.