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REQUIREMENTS PRIOR TO USE AND HOW TO OPERATE <br />Attaching the Access Tubes Once the depth and location for the Pressure-Vacuum Soil Water <br />Sampler have been established, you must determine the required <br />length for the access tubes before they are cut and attached to the <br />Soil Water Sampler. <br />The access tubes are generally made of 1/4-inch O.D. polyethyl- <br />ene, nylon, or teflon tubing. Each access tube is inserted into the <br />loosened top portion of the tube connector located on the service- <br />able end of the Soil Water Sampler. Tighten the fittings to finger <br />tightness. We recommend using 2 different colors of tubing to dif- <br />ferentiate between the two connectors in order to eliminate mis- <br />takes in identifying the access tubes once the Sampler is placed in <br />the soil. Soilmoisture offers both black and green polyethylene <br />tubing, models 1903E and 1904E respectively. <br />Pressure Testing Before We highly recommend pressure testing the complete Sampler as- <br />Installation sembly prior to installation. Your prior testing will confirm the <br />integrity of all joints and components. <br />After allowing the ceramic portion of the Sampler to soak in water <br />for approximately two hours, a sustained pressure of 20 psi can be <br />applied to the submerged Sampler, associated tubing, and connec- <br />tors. Continuous bubble formation indicates leakage and shows <br />the exact location of any leak. <br />Coring the Hole The Pressure-Vacuum Soil Water Sampler, Model 1920F1, may be <br />installed at any depth up to a maximum of 50 feet. <br />f_~ <br />.~ .. <br />.~.-. <br />_~.:~° <br />l+ <br />-~~.'r; <br />Figure 4a. ~~ Figare 4U. <br />In rock-free, uniform soils at shallow depths, use a 2-inch screw or <br />bucket auger for coring the hole (Figure 4a). If the soil is rocky, a fl- <br />inch auger should be used. The soil is then sifted (Figure 4b) <br />through a 1/4-inch mesh screen to free it of pebbles and rocks. This <br />SOILMOISTURE EQUIPMENT CORP. 9 ^® <br />P.O. Box 30025. Sonto Borboro, Colilornio 93105 USA / \ <br />Phone: (805) 964-3525 • Fox: (8051 683-2189 soi~MOisiuze <br />e-moil: solesQsoilmoisture.com ~ Web: hltp: //wwwsoilmoislure.com <br />