Laserfiche WebLink
Fa <br />2. Hydraulic pressure testing of the intact rock will be performed to <br />measure the rock permeability. A single packer positioned at the top <br />of the rock will be used. Measurement of the static water level in <br />the rock will be made during test. - <br />Piezometer Installation <br />(' 1. A standpipe -type piezometer, using 1 1/2 inch PVC pipe, will be <br />used. <br />(� 2. A screened or slotted tip of approximately 5 to 10 feet length <br />will be used. The slotted length will be surrounded with a well - <br />graded sand and a bentonite seal placed above and below it. <br />I. 3. The location of the slotted length will be selected by the field <br />engineer. If there are unusually high pressures and/or high perme- <br />ability in the rock, the piezometer will be set in the rock. <br />If not, the piezometer will be set in the alluvium over the most <br />pervious interval., <br />r_w <br />t <br />