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2-inch PVC locking, <br /> water tight cap <br /> Ground level <br /> Flush-mount, water-tight <br /> ...... ...... <br /> ...... ...... well cover or ticking <br /> standpipe <br /> 2-inch PVC casing <br /> ..... ...... <br /> ..... ...... <br /> ..... ...... <br /> Bentonite seal approximately <br /> 2 feet thick <br /> �—X'X <br /> .fr <br /> Top of sandpack set approximately 4X.: <br /> 1 to 2 feet above top of screenr;:r <br /> Top of screen set above highest <br /> expected water level <br /> 2-inch PVC <br /> slotted screen <br /> EXPLANATION <br /> Q Highest expected water level <br /> Neat cement or Volclay grout <br /> Bentonite seal PVC threaded cap <br /> Sandpack <br /> 8-inch borehole <br /> diameter <br /> Note: This diagram is not to scale. <br /> Figure 3. Typical monitoring well construction details. <br /> cca/9-30-92/8913a/JAWP13 10 <br />