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09 February 2004 <br /> AGE-NC Project No. 98-0452 <br /> Page 4of8 <br /> ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA <br /> Method 82608. <br /> Selected soil samples may also be analyzed for intrinsic permeability,moisture content,porosity and <br /> total organic carbon (TOC) in accordance with the appropriate EPA or ASTM methods. <br /> Laboratory reports of both soil and ground water analyses, testing methods, laboratory quality <br /> assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be <br /> presented in quarterly reports with findings and recommendations. <br /> 3.3. MONITORING WELL INSTALLATION, DEVELOPMENT AND SURVEY <br /> The pilot borings will be completed as 2-inch diameter single-level ground water monitoring wells <br /> screened from 5 to 25 feet bsg. Following installation, each well will be developed to maximize <br /> water flow and minimize the amount of fine-grained sediment drawn into the well during pumping <br /> or bailing. The top of each existing and newly installed well casing (well head) will be surveyed to <br /> determine its location as well as elevation relative to mean sea level.Procedures for well installation, <br /> development and surveying are presented in Sections 4.2, and 4.3., respectively. <br /> 3.4. GROUND WATER SAMPLING AND ANALYSIS <br /> The newly-installed monitoring wells will be incorporated into the existing site-monitoring program; <br /> ground water monitoring and sampling activities will be conducted for all the monitoring wells on <br /> a quarterly basis for a minimum of one year (four sampling events); monitoring activities will <br /> include recording depth to ground water measurements and collection of ground water samples for <br /> laboratory analysis by a DHS-certified laboratory for the analytes noted in Section 3.2. Ground water <br /> sample collection protocols are described in Section 4.4. <br /> 3.5. SENSITIVE RECEPTOR SURVEY <br /> A sensitive receptor survey will be conducted to identify receptors whereby environmental and/or <br /> public health could potentially be threatened by the unauthorized release of petroleum hydrocarbons <br /> at the site. The survey will consist of a reconnaissance of the site and surrounding area, review of <br /> well completion reports on file with the Department of Water Resources (DWR), and inquiries to <br /> the local water purveyor to identify sensitive receptors within 2,000 feet of the site, including <br /> municipal wells,domestic wells,monitoring wells,septic systems, surface water, and ground water. <br /> Advanced GeoEnvironmental,Inc. <br />