Product Manual

Page 14
©Turf-Tec International - www.turf-tec.com
1471 Capital Circle NW #13, Tallahassee, FL. 32303 - USA
8.1.2 The test requires an area of approximately 3 by 3m (10 by 10 ft.) accessible by
a truck.
8.1.3 The test site should be nearly level, or a level surface should be prepared.
8.1.4 The test may be set up in a pit if infiltration rates are desired at depth rather
than at the surface.
8.2 Technical Precautions:
8.2.1 For long-term tests, avoid unattended sites where interference with test
equipment is possible, such as sites near children or in pastures with livestock.
Also, evaporation of fluid from the rings and unsealed reservoirs can lead to
errors in the measured infiltration rate. Therefore, in such tests, completely
cover the top of the rings and unsealed reservoirs with a relatively airtight
material, but vented to the atmosphere through a small hole or tube. In addition,
make measurements to verify that the rate of evaporation in a similar test
configuration (without any infiltration into the soil) is less than 20% of the
infiltration rate being measured.
8.2.2 Make provisions to protect the test apparatus and fluid from direct sunlight and
temperature variations large enough to affect the slow measurements
significantly, especially for test durations greater than a few hours or those
using a Mariotte tube. The expansion or contraction of the air in the Mariotte
tube above the water due to temperature changes may cause changes in the
rate of flow of the liquid from the tube, which will result in a fluctuating water
level in the Turf-Tec Infiltration rings.
8.3 Driving Turf-Tec Infiltration Rings with a Sledge:
NOTE 5—Driving infiltration rings with a Jack is preferred see 8.4
8.3.1 Place Turf-Tec IN11-W Steel Driving Plate, or suitable wooden driving cap, on
the Turf-Tec Infiltration rings and center it on them. Be sure driving cap is flat
against the surface of both rings to prevent damage. Place the wood block
(see 6.3) on the driving cap.
8.3.2 Drive the Turf-Tec Infiltration rings into the soil with
blows of a sledge on the wood block to a depth that will
prevent the test fluid from leaking to the ground surface
surrounding the ring. A depth of about 50 mm (2 in.) on the
outer ring is usually adequate. Use blows of medium force
to prevent fracturing of the soil surface or damage to the
rings. Move the hammer and wood block around the edge
of the driving cap every one or two blows so that the ring
will penetrate the soil uniformly. A second person standing
on the wood block and driving cap will usually facilitate
driving the ring, and reduce vibrations and disturbance.
Figure 3
IN11-W Driving Plate shown
with IN8P-W Infiltration Rings