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4.0 SAND INSTALLATION IN 1.0 IN. X 2.5-IN. PREPACK WELL SCREEN <br /> Due to their physical size, 10-in x 2 5-m OD Prepack Well Screens are shipped without sand It is therefore <br /> ' necessary to install sand within the screen prior to use A specific packing procedure must be followed in order <br /> to prevent the sand from settling in the screen after well installation This section describes the procedure for <br /> properly installing sand in a I Dan x 2 5-in OD Prepack Well Screen <br /> 41 Required Equipment <br /> Sand Cylinder <br /> ' I Quart(1 L)Container(1) (12898) <br /> Phillips-Head Screwdriver(t) <br /> 20-40 Mesh Sand(lgallon/3 75 L) Red Plastic Plug <br /> ' Prepack Screen Assembly,PIN 11679(1) (13227) <br /> Red Plastic Plug, (1) <br /> Stainless Steel Screw, (2) Stainless Screw <br /> Gray PVC Cap,(I) _ <br /> Sand Cylinder,(1) 1 25 m Gray PVC Bushing <br /> 42 Procedure <br /> 1 I Ensure that the red plastic plug is pushed <br /> into the top of the PVC riser and both <br /> ' screws are threaded into the gray bushing <br /> (Fig 4 1) <br /> 2 Slide the clear sand cylinder over the <br /> screen such that the leading end of the cyl- <br /> inder is approximately 1 25 inches below FIGURE 4 t <br /> Selected components Well <br /> a 7 re n x 2 5-m OD <br /> the top of the gray PVC bushing(Fig 4 1) <br /> Prepack Wel! Screen <br /> Important Do not push the sand cylinder far- <br /> ther onto the screen than indicated as this <br /> ' will make it difficult to remove once the screen is packed with sand <br /> Caution Use care when handling the prepacked screen with bare hands Small wires protruding from <br /> the screen can easily puncture the skin <br /> 3 Pour 3 quarts(3 L) of sand into the sand cylinder This will fill the screen approximately 314 to 7/8 <br /> ' full <br /> 4 The screen must now be tapped on the ground to settle(pack)the sand <br /> a) Gently grasp the screen and raise it approximately 2 inches(5 cm)off the ground <br /> Important Be careful when gripping the screen to squeeze itjust hard enough to lift it from the ground <br /> ' The screen may be damaged if too much pressure is applied before the screen is packed with sand <br /> b)Release the screen and allow it to fall back to the ground <br /> Important:Do not drop the screen more than 2 inches(5 em)as this can damage the screen <br /> i <br /> ' Standard Operating Procedure Page 8 1 0-in x 2 5-in OD Prepack Screen Monitoring Well <br />