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00st 00n <br /> I <br /> Ground surface 2 a <br /> ♦♦♦ I ♦ <br /> ♦ <br /> ♦ ♦ I <br /> I I ♦ ♦ <br /> ♦ <br /> I , <br /> Portland cement �' ( ♦ ♦ <br /> ♦I♦ Steel casing, 16"dia <br /> ♦ 1 ♦ <br /> I♦r I ♦♦ 245 <br /> 270 ♦♦ i ♦ � <br /> Bentonite 285 <br /> Fine sand 290 lei <br /> I , <br /> ` 300 <br /> Filterpack(1-3 mm) I + <br /> =, tEG®double-cased screen <br /> I366 <br /> 376 _ <br /> I i <br /> Bentonite <br /> I Steel casing 16"dia <br /> 385 I — <br /> Fine sand 390 Ir,Fr <br /> (<a25 mm) <br /> I _ 400 <br /> FiterPack(1-3 mm) .- 1 I - Irrigator screen <br /> ` I <br /> 440 <br /> 460 -`" r <br /> Tight wind sump <br /> Open borehole diameter 24- <br /> Figure 3 UV$ well diagram �® <br />