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decontaminated surge block, mounted on drill line (drill rod-mounted surge blocks <br /> destroy the plastic screw-on caps on the well bottom...) is carefully sounded to the <br /> well bottom. The block is raised and the drill line is marked and secured to prevent <br /> bottoming. The well is surged in five-foot intervals for a minimumof ten minutes <br /> per interval. This procedure continues until the entire wetted well screen has been <br /> surged. After the surging, the well is bailed until the water clears or a minimum of <br /> four casing voiummes are bailed. <br /> II <br /> Well Head Com letion <br /> Monitoring wells are typically finished at grade in traffic-rated well vaults set in <br /> concrete pads. The pads should provide a minimum of six inches of concrete <br /> around the well box, and slope away from it prevent the entry of surface water. <br /> The well riser is secured beneath the well box with a lockable, expansive bung. <br /> This cap shall bear the Monitoring well identification and elevation, if known. <br /> 1 <br /> i <br /> r <br /> r <br />