Packer Test also known as Lugeon Test was carried out in accordance to BS 5930:1999, Section 4, Part 25.5. The packer test gives a measure of the acceptance by in-situ rock of the water under pressure. The test was originally introduced by Lugeon (1933) to provide an acceptable standard for testing the permeability of dam foundation. In essence, it comprises the measurement of the volume of water that can escape from an uncased section of borehole in given time under a given pressure. The result of the test usually expressed in terms of Lugeon units.