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i r 06 February 2004 1\1,3E-NC Project No 01-0865 Page 4 of 9 frorn the drainage ditch drains into the north side of the Island.Drainage Canal where the water is pumped Into the Little Connection Slough The flow path of the proposed discharge is depicted in Figure 2 HHM has reached a tentative agreement with the property owner(Henry and Vivian Rurup) of the agriculture drainage ditch to utilize it for system discharge 1 7 General Operations And Maintenance Procedures Of Ground Water Treatment System The ground water extraction well pump is controller-less and operates by air pressure and is regulated by an inline regulator The pneumatic pump will adjust its pumping rate as the water level drops in the well to maintain a continuous flow The process pump will be controlled by a PumpTec controller, the pump will operate independently on a separate controller A battery-powered and a manual ground water flow meter and total flow indicator will be installed at the outlet of the treatment system for continuous measurements Measurements will be monitored daily for the first two-weeks (start-up period) and on a weekly basis thereafter The process pump, located behind the holding tank,will be controlled by electrode switches placed iat various levels in the holding tank An emergency shut-off switch will be located immediately below the top of the holding tank An intermediate pump-on switch will be placed approximately 8-inches below the emergency shut-off switch to activate the process pump Intermediate pump-off switches will be utilized near the bottom of the holding tank to turn the process pump off One 550-gallon poly tank equipped with a suspended-solids pre-filter will be used to temporarily store extracted water prior to processing The tank will be equipped with various level control switches to control the rate at which extracted water is introduced into the treatment vessels, to provide safety shutoff capabilities and to allow coarse sediment to settle out prior to treatment The process pump is located directly behind the holding tank The first stage of treatment will consist of two 1,000-pound GAC absorption vessels designed to absorb TPH-g, BTEX and fuel additives, including MTBE, a second treatment stage will remove MTBE via absorbtion in a 1,000-pound SunSolve vessel, the final stage will utilize a 1,000-pound GAC vessel to ensure that all petroleum hydrocarbon products have been removed Sample ports are located between all vessels to allow detection of media break-through and to obtain final discharge samples The system layout is depicted in Figure 3 At the time of system start-up, the discharge water will be routed into a holding tank until initial laboratory results are received to ensure that the remediation system is removing pollutants as designed Advanced GeoEnvironmental,Inc