lysimeter study approach
DESCRIPTION
Lysimeter Study Approach. Simulate landfill disposal of CCA 6 PVC Columns 22 feet high, 1-Foot diameter Natural Precipitation or DI water infiltrates through a cap and creates leachate. Disposal Scenarios. CCA Monofill Construction and Demolition (C&D) Landfill - PowerPoint PPT PresentationTRANSCRIPT
Lysimeter Study Approach
• Simulate landfill disposal of CCA
• 6 PVC Columns
• 22 feet high, 1-Foot diameter
• Natural Precipitation or DI water infiltrates through a cap and creates leachate
Disposal Scenarios
• CCA Monofill
• Construction and Demolition (C&D) Landfill
• Municipal Solid Waste (MSW) Landfill
FRONT LYSIMETER VIEW SIDE LYSIMETER VIEW
CONCRETE
BLOCKS
SUPPORT
POST
STRAPPING STRAPPING
TREATMENT
PLANT RAILING
GROUND LEVEL
12” 12”
21’
CONCRETE
PAD
20’ WASTE
20’ WASTE
CATCHMENT
BASINS
DRAINAGE
MATERIAL DRAINAGE
MATERIAL
12”
Lysimeters
• Lysimeter 1 – Untreated wood
• Lysimeter 2 – CCA: 50% old, 50% new
• Lysimeter 3 – Typical C&D mix
• Lysimeter 4 – C&D w/CCA
• Lyimeter 5 – MSW w/untreated wood
• Lysimeter 6 – MSW w/CCA
Monitoring
• Lysimeters began operation on August 28 (Wood, C&D) and September 27, 2001 (MSW)
• Weekly temperature taken inside the lysimeters at 3 different depths (5, 10, 19 feet from the top of waste)
• Record volume and characterize gas produced– Test gas with Landtec Gem 500 (methane,
CO2)
Leachate Collection
• Collect leachate twice monthly and analyze for general water quality parameters and As, Cu, and Cr
Preliminary Results
• Weekly Temp monitoring fluctuates with ambient temps
• Weekly gas monitoring – methane detected up to 60% in MSW lysimeters
• Leachate generated from all lysimeters
• Metals found in Lysimeters w/CCA– Lys 2 - 9/28/2001– Lys 4 - 6/25/2002– Lys 6 - 7/17/2002
Lysimeter 2 – 100% CCA
0
10
20
30
40
50
60
mg
/L
Arsenic
CopperChromium
Lysimeter 4 – C&D w/ 10% CCA
0
0.5
1
1.5
2
2.5
mg
/L
ArsenicCopper
Chromium
Lysimeter 6 – MSW w/ 2% CCA
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
7/3/
2002
7/23
/200
2
8/12
/200
2
9/1/
2002
9/21
/200
2
10/1
1/20
02
10/3
1/20
02
11/2
0/20
02
12/1
0/20
02
12/3
0/20
02
mg
/L
ArsenicCopperChromium
Lysimeter Leachate pH
3
4
5
6
7
8
9
7/28/2001 11/5/2001 2/13/2002 5/24/2002 9/1/2002 12/10/2002 3/20/2003
pH
Lys 1
Lys 2
Lys 3
Lys 4
Lys 5
Lys 6
CCA
UT Wood
C&D
MSW
Arsenic
0.1
1
10
100
mg
/L
CCA
MSW-CCA
C&D-CCA
Chromium
0.1
1
10
100
7/28
/200
1
9/16
/200
1
11/5
/200
1
12/2
5/20
01
2/13
/200
2
4/4/
2002
5/24
/200
2
7/13
/200
2
9/1/
2002
10/2
1/20
02
12/1
0/20
02
1/29
/200
3
mg
/L
CCA
MSW-CCA
C&D-CCA
Copper
0.01
0.1
1
10
7/28
/200
1
9/16
/200
1
11/5
/200
1
12/2
5/20
01
2/13
/200
2
4/4/
2002
5/24
/200
2
7/13
/200
2
9/1/
2002
10/2
1/20
02
12/1
0/20
02
1/29
/200
3
mg
/L
CCA
MSW-CCA
C&D-CCA
Operation
• Lysimeters will continue operation through spring and summer– DI water added as needed– Temp and Gas readings taken weekly– Leachate collection twice monthly and
continued analysis for general water quality parameters and As, Cu, Cr