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l <br /> 12 July 2001 <br /> AGE-NC Project No 98-0432 <br /> Page 9of10 <br /> 43 INSTALLATION OF REMEDIATION SYSTEM PIPING NETWORK <br /> Two-Inch diameter, schedule 80 PVC piping (process piping) will be installed In a single trench <br /> approximately 1%a-foot bsg deep and 1-foot wide and routed from ground water extraction well <br /> EW-1 to the ground water treatment system, one-Inch diameter, schedule 80 PVC electrical conduit <br /> will be Installed in the same trench and routed from the well-head at EW-1 to an electrical fuse box <br /> An individual sample port with check valve to prevent back-flow cross contamination will be <br /> Installed at the monitoring well process piping riser This port will allow sampling of EW-1 <br /> Independently without having to remove the well head assembly Following piping placement, the <br /> trench will be backfilled with imported road-base sand, compacted and covered with resurfaced with <br /> asphalt A cut view drawing of the process piping layout is included in Figure 3, a plan view drawing <br /> of the piping network is depicted in Figure 3 <br /> 4 4 GROUND WATER PUMP AND TREAT SYSTEM <br /> From well EW-1, extracted ground water will be routed through a 750-gallon holding tank, from <br /> which it will pass through a process pump and a 1-micron sediment bag filter As indicated above, <br /> this tank is equipped with various level control switches which serve to control the rate at which <br /> extracted water is introduced into the treatment vessels, to provide safety shutoff capabilities and to <br /> allow coarser sediment to settle out prior to treatment The process pump is located directly behind <br /> the holding tank <br /> The treatment media will be contained in two 2,000-pound GAC absorption vessels The two <br /> vessels will be designed to adsorb fuel oxygenated compounds (I e MTBE) Sample ports are <br /> located between all vessels to allow detection of media break through and to obtain final discharge <br /> samples The system layout is depicted in Figure 4 <br /> 4 5 REMEDIATION SYSTEM START-UP PERIOD <br /> During the pump and treat start-up period(first two weeks of operation), ground water influent and <br /> effluent of the treatment system, depth to ground water measurements and operational parameters <br /> (ground water flow meters, fluid level sensors, total flow indicators) will be monitored daily to <br /> optimize system performance and document removal of dissolved hydrocarbons and dissolved <br /> MTBE <br /> Advanced GeoEnvlranmental,Inc <br />