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1 <br /> tSoil cuttings from the borings were contained in 55-gallon DOT 17 E/H drums and <br /> labeled Upon completion of Boring B-1, the hole was backfilled with neat cement by the <br /> tremae method <br /> 1 <br />' 4.0 GROUNDWATER MONITORING WELL <br /> INSTALLATION AND DEVELOPMENT <br />' Drilfing methods for the groundwater monitoring well installation were performed as <br /> outlined in Section 3 0 of this Data Report <br /> Well construction materials consisted of 2-inch diameter schedule 40 PVC casing with <br /> flush threaded Joints The length of the slotted interval was 20 feet to facilitate the <br />' apparent drop in groundwater elevation over the past several years <br /> Prior to installation in the well MW-4, the PVC casing and slotted pipe were washed with <br /> a high-pressure, high-temperature cleaner <br /> The annular space around the slotted interval was back-filled with washed, kiln-dried, <br /> graded #2112 sand The sand was placed through the hollow stem auger to a level two <br /> feet above the slotted interval A three-foot layer of 114-inch bentonite pellets was placed <br /> above the sand pack and hydrated with potable water Neat cement was placed above <br /> the bentonite pellet seal by the tremae method <br /> A water tight traffic rated vault was installed at surface grade at the well location The <br />' well was developed by surging, bailing and pumping until the water reached a degree of <br /> clarity The well construction details are presented on the boring logs for MW-4 (Plates <br /> 5 thru S) <br /> A copy of the approved SJPHS well permit application is presented as Attachment A <br /> 3 BSK <br />