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13 November 2000 <br /> AGE-NC Project No. 98-0481 <br /> Page 6of10 <br /> u <br /> repeatable sampling points for monitoring of petroleum hydrocarbon impact to ground water and <br /> allow determination of site-specific p ground water flow direction. The procedures for monitoring well <br /> installation and collection of soil and ground water samples are presented in Section 4.3 and <br /> Section 4.5, respectively. Monitoring well installation activities are described below. <br /> 3.4.1. Permitting and Pre-Field Work Activities <br /> r <br /> Prior to monitoring well installation, any applicable well permits will be obtained from the PHS- <br /> EHD prior to mobilization, each monitoring well location will be clearly marked and a utility <br /> clearance obtained through Underground Service Alert. <br /> 3.4.2. Soil Sample Collection and Analysis <br /> During the drilling of the proposed monitoring well pilot borings, soil samples will be collected at <br /> five-foot intervals from ground surface to the total depth of the borings. Field procedures for <br /> collection of soil samples are presented in Section 4.1.At least one soil sample from each monitoring <br /> .�� well pilot boring will be analyzed for BTEX,TPH-g,TPH-d, fuel oxygenating compounds, 1,2-DCA <br /> and EDB following the laboratory methods specified in Section 3.2. <br /> Laboratory reports for ground water analyses,testing methods, laboratory quality assurance/quality <br /> control(QA/QC)reports, and sample chain of custody documentation will be presented in a report <br /> with the findings and recommendations. <br /> 3.4.3. Monitoring Well Installation and Development <br /> Following advancement of the monitoring well pilot borings, two-inch diameter monitoring wells <br /> will be installed in each of the borings. Ground water monitoring wells will consist of 20 feet of well <br /> screen section. The well screen section will be installed across the observed water table level with <br /> five feet of screen section extending above the water level and 15 feet of screen section extending <br /> below the water table level. Based on ground water table level, it is anticipated that the total depth <br /> of the monitoring wells will be approximately 75 feet bsg. <br /> Following well installation, the wells will be developed to maximize water flow into the well and <br /> minimize the amount of fine-grained sediment drawn into the well during sampling activities. Field <br /> procedures for monitoring well installation and development are presented in Sections 4.3 and 4.4, <br /> respectively. <br /> Advanced GeoEnviro n mental,Inc. <br /> :r <br />