amoozemeter field demonstration for determining landfill
TRANSCRIPT
Jo House
5/16/2019
Amoozemeter Field Demonstration for Determining Landfill Clay Liner Hydraulic Conductivity
• LANDFILL LINER REQUIREMENTS:
• A MINIMUM OF THREE FEET IN THICKNESS, AND
• SHALL BE CONSTRUCTED/COMPACTED WITH SOILS WITH A MAXIMUM HYDRAULIC CONDUCTIVITY OF 1 X 10-7 CM/SEC
SOLID WASTE REGULATIONS PROMULGATED
IN MARCH 1990
• INABILITY OF SHELBY TUBE TO CAPTURE SUFFICIENT SOIL FOR LAB HYDRAULIC CONDUCTIVITY TESTING
• GRAVEL /ROCK CAN BEND THE END OF THE SHELBY TUBE
• GRAVEL/ROCK WITHIN SAMPLE COMPROMISES INTEGRITY OF THE SAMPLE TO PROVIDE AN ACCURATE MEASUREMENT
• LOW POTENTIAL TO DETERMINE “MACROPORES” IN THE BARRIER LAYER
• POTENTIAL DISTURBANCE IN DELIVERY TO THE LAB
LIMITATIONS OF
LABORATORY HYDRAULIC CONDUCTIVITY TESTS
• SEALED DOUBLE RING INFILTROMETER TEST (SDRI)
• TWO STAGE BOUTWELL PERMEAMETER (TSB)
INDUSTRY ACCEPTED FIELD TEST METHODS FOR DETERMINATION OF
HYDRAULIC CONDUCTIVITY OF LANDFILL BARRIERS
TDSWM CQA GUIDANCE POLICY
TABLE 2
TWO STAGE BOUTWELL PERMEAMETER (TSB) / ASTM D6391 Standard Test Method for Field Measurement of Hydraulic Conductivity Using Borehole Infiltration
Typical Cross Section of the Two Stage Boutwell Permeameter (TSB)
COMPACT CONSTANT HEAD PERMEAMETER (AKA AMOOZEMETER) DEVELOPED BY: AZIZ AMOOZGAR NORTH CAROLINA STATE UNIVERSITY
AMOOZEMETER SCHEMATIC
Amoozemeter Typical Cross Section
Clay Liner Amoozemeter Test Setup
Clay Liner Amoozemeter Test Setup
Amoozemeter Test in Progress
Amoozemeter Test in Progress
Amoozemeter Data Sheet
Comparison of Amoozemeter Tests with
ASTM D5084 Lab Test
Measurement
Number
Test/Sample
Location Lift/Layer
Amoozemeter Ksat
AVG [cm/s]
Ksat (ASTM D5084)
(cm/sec)
1 Test Pad West 1 2.13E-06 1.10E-06
2 NE Corner of test
Pad 2 and 3
8.00E-06
2.00E-06
3 NE Corner of test
Pad 2 and 3 9.00E-07
• The Amoozemeter can be used to measure silty/sandy soils situated within the geologic buffer zone in certain areas of Tennessee where the anticipated hydraulic conductivity exceeds 1 x 10-6 cm/sec
• Hydraulic head is not significant enough to measure below 1 x 10-6 cm/sec
• The constant head provided by the Amoozemeter was the intriguing aspect of the test that triggered this experiment
Conclusions
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