Standard Test Method for (Field Procedure) for Instantaneous Change in Head (Slug) Tests for Determining Hydraulic Properties of Aquifers
This slug test field procedure is used in conjunction with a slug test analytical procedure, such as Test Method D4104 to provide quick and relatively inexpensive estimates of transmissivity.
The slug test provides an advantage over pumping tests in that it does not require the disposal of the large quantities of water that may be produced. This is of special importance when testing a potentially contaminated aquifer. However, slug tests reflect conditions near the well, therefore are influenced by near-well conditions, such as gravel pack, poor well development, and skin effects.
Slug tests may be made in aquifer materials of lower hydraulic conductivity than generally considered suitable for hydraulic testing with pumping tests.
The method of data analysis (analytical procedure) should be known prior to the field testing to ensure that all appropriate dimensions and measurements are properly recorded. Selection of the analytical procedure can be aided by using Guide D4043, Test Method D5785, Test Method D5881, and Test Method D5912.
1.1 This test method covers the field procedure for performing an in situ instantaneous change in head (slug) test.
1.2 This test method is used in conjunction with an analytical procedure such as Test Method D4104 to determine aquifer properties.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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