HomeMy WebLinkAbout5803_ROSCANS_1993AI -1- 1F-199. � 15:28 FROM
P . 01
Post -It' brand W transmittal memo 76T1
August-1 1, 1993
MEMQ
FROM Jan McHargue
SUBJE,CF. Comments on COA Documentation for Madison County
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My co eats on the above submittal are as follows:
1. ecord drawings for the facility should be submitted showing the following:
A. Finished lines and grades of the excavated cell, liner system, and final cover;
As -built location of all features of the landfill, including the leachate
collection system, stormwater segregation and removal devices, and details as
necessary;
Locations of all in -place permeability tests, especially the 1.4x10-7 cm/s result;
d. Panel layout of synthetic liner showing location of all seams and destructive
samples;
(Note: The topographic survey that was provided does not show all of the above and
deletes the entire southwest corner of the landfill.)
►Q
3.
k summary of density test results should be submitted for the soil liner and structural
till areas.
ith regard to the synthetic liner documentation: (See Attala's separate report;
ection 2.)
4. Locations of tests aren't clear from field notes.
b. Several panels appear to be drawn incorrectly on the field notes.(e.g. panels
8 & 6, panels 16 & 15, and panels 17 & 16.)
Panel Ws not given for the last two pages in AttaWs report, Section 2.
d. Apparently missing seam tests in the leachate pond, between panels 35 and
71, between panels 37 and 49, 71 and 72.
It appears that only one destructive test was made in the pon.d.(Specs call for
one every 500 linear feet.)
The type of weld and test results for panel 39 are missing.
g. Sheet 57-What was seamed to what?
h. With regard to the extrusion weld around the bottom -It is unclear where the
destructive test is.
1. No information on testing for the following seams:
67-64, 63-68, 62-68, 37-41,, 41-40, 40-39, 36-3, 72-35, 73-72, 73-81,-80,-79,-78,56-
55, 46-47, 51-52, 55-57, 75-76, 74-75, 74-58B,58-76,-75, -74, -58-B.
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Page Two
Memo to Ellis
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4, With regard to the-leachate ollectiun-sy
a. Need copy of DEM's permit
b_ 7.5 feet of head on the leachate pond may be excessive.
C. Perhaps the operational plan should be more specific than to state that
"leachate will be removed ... periodically..."
5. Monitoring wells on the topographic map are not numbered consistently with the
original application, and one is missing entirely.
6. Buffer infringement due to flattening of north and east slopes, This needs to be
addressed more thoroughly. No details were provided on the berm that was
mentioned in Section 3.2.1 of the CQA Report, and it was not located on the
surveyor's drawing.
7. Liner material substitution described in Section 3.4.1:
Reasons given for this substitution are unsatisfactory. No slope stability calculations
were used to show equivalence.
8. Final cover requirements appear to be inadequate. If the synthetic is HDPE, it must
be 60 mails thick.
9. There is no general statement (with an Engineer's seal) that the facility was
constructed according to the plazas and specs.
10. No photographs or slides were provided. (See Section 4.4 of Appendix 11 of the CQA
Report.)
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_ SUMMAIdY OF LABORATORY TESTING
Madison County Landfill
CONSTANT HEAD PERMEABILITY TEST
ASTM D 5084 -- -
II. Test Locations: Boring No. 1
III. Material Description:
IV. Material Condition: Bulk Sample - Remolded
V. Proctor Data:
Maximum Dry Density (pcf): 80.0
Optimum Moisture Content (%): 38.0
VI. Test Data:
Dry Density (pcf):
76.0
Initial Moisture Content (%):
38.9
Final Moisture Content (%):
45.8
Sample Length (cm):
5.11
Sample Area (cm):
42.08
Head (cm):
140.68
Quantity of Water Passing Through Sample (cm3):
128.9
Elapsed Time (sec):
261,540
Temperature (°F):
73
Viscosity Correction Factor:
0.931
Coefficient of Permeability -k (cm/sec):
4.0 x 10-'
VII. Comments: Consolidated and tested at 2 psi head difference.
F'VIC)Co TOH TEST REPORT
95
90
- 85
u
c�.
—
Ln
80
(U
n
L
-
O
ZAV for
Sp.G.=
75
2.90
E 70
32.5 35 37.5 40 42.5 45 47.5
Water content, %
"Standard" Proctor, ASTM D 69B, Method A
Elev/ Classification Nat. Sp.G. LL PI % > %
Depth USCS AASHTO Moist. No. 4 No. 200
TEST RESULTS
MATERIAL DESCRIPTION
Optimum moisture = 38.0 %
Maximum dry density = 80.0 pcf
RED BROWN FINE TO MEDIUM
SANDY CLAYEY SILT
Project No.: .226-09998-01-LAW/ASHEVILLE #243-04683-02
Project: MADISON COUNTY LANDFILL
Location:
Date: B-27-1993
Client:
Proposed Use:
Remarks:
Curve No. 1
PROCTOR TEST REPORT
LAW ENGINEERING, INC.