Laserfiche WebLink
w <br /> SWELL CONSTRUCTION AND DEVELOPMENT <br /> All materials used in well construction will be <br /> thoroughly cleaned prior to introduction into the boring. <br /> A 2-inch OD well casing (PVC) with and end cap, factory <br /> perforated for placement into the saturated zone, will be <br /> placed in the boning. The perforated interval shall extend <br /> i *. <br /> to a maximum of twenty feet below, or to the first competent <br /> clay layer greater than three feet th..ck, and ten feet above <br /> the saturated zone. The casing and end caps will be <br /> ,.o <br /> i . <br /> threaded; no PVC cement will be used. The filter pack will <br /> extend two feet above the perforated zone. A seal of <br /> bentonite granules two feet thick will be placed in the <br /> annular space above the filter pack, followed by a 5% <br /> s <br /> bentonite slurry to grade. All filter pack and well seals <br /> '.. j will be tremmied through the auger as necessary. <br /> A locking cap will be placed on top of the well casing <br /> inside a water--tight well box cemented into place. All wells <br /> will be labeled on the exterior of the well head containment <br /> structure with well type and identification number. on the <br /> �a <br /> interior, the label will contain well type, identification <br /> number, depth, and the perforation intervals. Monitoring <br /> wells will be developed by airlifting with compressed <br /> nitrogen, pumped using suitable pumping equipment (or bailed) <br /> until clear water is removed. Water removed from the well <br /> during development and subsequent evacuations will be <br /> contained within 55-gallon drums for later treatment and/or_____ _ <br /> disposal. <br /> PAGE 3 <br /> F� <br />