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of the perforated section to the ground surface (or above, in the case of above-ground <br /> completion) <br /> The annular space surrounding the well screen and casing will be packed with No 1120 <br /> (or equivalent) sand, from the bottom of the screen to approximately 2 feet above the top of <br /> the screen. The well will then be bailed or surged to settle the filter pack, and more sand will <br /> be added as necessary to return the level to a height of 2 feet above the top of the screen <br /> A 2- to 3-foot-thick seal of bentonite pellets will be placed above the sand pack The well <br /> will then be grouted with bentonite-cement slurry or neat cement, from the top of the <br /> bentonite seal to the surface Groundwater monitoring wells commonly will be completed <br /> below grade and protected with a water-tight locking cover A typical well construction is <br /> illustrated on Figure A-1 <br /> The top of casing (TQC) will be surveyed by a licensed surveyor, and all depths to water <br /> will be measured in relation to the surveyed mark on the TOC <br /> Momtonng Well Development Groundwater monitoring wells will be developed by <br /> surging, bailing, or pumping until clean, sediment-free water is produced from the well The <br /> length of development time varies, depending upon field conditions Development water is <br /> contained in 55-gallon barrels, which will be stored temporarily on site until disposal. <br />• <br /> 26404ZEPORTS%2640-01 WP <br />