site suitability review of the lloyd sanitation landfill · 2006. 6. 2. · the lloyd solid waste...
TRANSCRIPT
![Page 1: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/1.jpg)
Site Suitability Reviewof the
Lloyd Sanitation Landfill
byJeffrey Olson
North Dakota State Water Commissionand
Phillip L. GreerNorth Dakota Geological Survey
Prepared by theNorth Dakota State Water Commissionand theNorth Dakota Geological Survey
ND Landfill Site Investigation No. 14
![Page 2: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/2.jpg)
SITE SUITABILITY REVIEWOF THE
LLOYD LANDFILL
By Jeffrey M. Olson, North Dakota State Water Commission,
and Phillip L. Greer, North Dakota Geological Survey
North Dakota Landfill Site Investigation 14
Prepared by the NORTH DAKOTA STATE WATER COMMISSIONand the NORTH DAKOTA GEOLOGICAL SURVEY
Bismarck, North Dakota1993
![Page 3: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/3.jpg)
TABLE OF CONTENTS
Page
INTRODUCTION 1
Purpose 1
Location of the Lloyd Landfill 1
Previous Site Investigations 3
Methods of Investigation 3
Test Hole Drilling Procedure 3
Test Hole Plugging Procedure 4
Location-Numbering System 4
GEOLOGY 7
HYDROLOGY 10
Surface Water Hydrology 10
Ground-Water Hydrology 10
CONCLUSIONS 11
REFERENCES 13
APPENDIX A Lithologic Logs of Test Holes. 14
ii
![Page 4: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/4.jpg)
LIST OF FIGURES
Page
Figure 1. Location of the Lloyd landfill in the NW1/4, NW 1/4 of section 13, T148N, R71W 2
Figure 2. Test hole plugging procedure. 5
Figure 3. Location-numbering system for the Lloydlandfill 6
Figure 4. Location of test holes at the Lloydlandfill 8
Figure 5. Geohydrologic-section A-A' in the Lloydlandfill 9
iii
![Page 5: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/5.jpg)
INTRODUCTION
Purpose
The North Dakota State Engineer and the North Dakota
State Geologist were instructed by the 52 nd State Legislative
Assembly to conduct site-suitability reviews of the municipal
landfills in the state of North Dakota. These reviews are to
be completed by July 1, 1995 (North Dakota Century Code 23-
29-07.7). The purpose of this program is to evaluate site
suitability of each landfill for disposal of solid waste
based on geologic and hydrologic characteristics. Reports
will be provided to the North Dakota State Department of
Health and Consolidated Laboratories (NDSDHCL) for use in
site improvement, site remediation, or landfill closure.
Additional studies may be necessary to meet the requirements
of the NDSDHCL for continued operation of municipal solid
waste landfills. The Lloyd solid waste landfill is one of
the landfills being evaluated.
Location of the Lloyd Landfill
The Lloyd solid waste landfill is located two miles west
of the City of Fessenden in Township 148 North, Range 71
West, NW 1/4, NW 1/4 Section 13 (Fig. 1). The landfill site
encompasses approximately 40 acres of which about 10 acres
has been used.
1
![Page 6: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/6.jpg)
R71W
R71W
Building Landfill Boundary 0 Sewage Lagoon
t Cemetery Wells
Elevation in feet aboveMSL (NGVD of 1929) County
Figure 1. Location of the Lloyd landfill in the NW 1/4,NW 1/4 of section 13, T.148N., R.71W.
2
![Page 7: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/7.jpg)
Previous Site Investigations
Previous investigations include two test holes drilled
to a depth of 35 feet by Schinelfenig Well Drilling in 1977.
Lithologic logs of the test holes indicated clay till through
the entire 35 feet. No other geological or hydrological
investigations have been completed at the Lloyd landfill.
Methods of Investigation
The Lloyd study was accomplished by means of drilling
test holes with no water-quality analyses performed.
Test Hole Drilling Procedure
The drilling method at the Lloyd landfill was based on
the site's geology and depth to ground water, as determined
by the preliminary evaluation. A forward rotary rig was used
at the Lloyd landfill because the sediments consisted of a
very tight predominantly clay till and because the depth to
the water table was expected to be greater than 70 feet. The
lithologic descriptions were determined from the drill
cuttings.
Five test holes were drilled at the Lloyd landfill, and
no monitoring wells were installed in any of them. The test
holes were drilled near the active area of the landfill.
3
![Page 8: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/8.jpg)
Test Hole Plugging Procedure
The test holes were plugged according to NDSDHCL and
Board of Water Well Contractors regulations (North Dakota
Department of Health, 1986). Test holes were plugged with
high-solids bentonite grout and/or neat cement to a depth
approximately five feet below land surface (Fig. 2). The
upper five feet of the test hole was filled with soil
cuttings.
Location-Numbering System
The system for denoting the location of a test hole or
observation well is based on the federal system of
rectangular surveys of public land. The first and second
numbers indicate Township north and Range west of the 5th
Principle Meridian and baseline (Fig. 3). The third number
indicates the section. The letters A, B, C, and D designate,
respectively, the northeast, northwest, southwest, and
southeast quarter section (160-acre tract), quarter-quarter
section (40-acre tract), and quarter-quarter-quarter section
(10-acre tract). Therefore, a well denoted by 148-071-13BBA
would be located in the SE1/4, NW1/4, NW1/4, Section 13,
Township 148 North, Range 71 West. Consecutive numbers are
4
![Page 9: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/9.jpg)
/ / /3 Feet
% % % % I/ / /
e%ee‘e% e e\e‘e e• • • % • % ♦ • • I
/•• • • • • • • • • I
eeeee eele eeeee er• • • • • • • •
e s.
' e e,,,, •■%.1, ,Ie,,eee'.1
/ / /Soil Cuttings
Cement Grout
Figure 2. Test hole plugging procedure.
5
![Page 10: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/10.jpg)
isNwte sNs*c.e.m tot t.he I,loya landfill,
![Page 11: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/11.jpg)
added following the three letters if more than one well is
located in a 10-acre tract, e.g. 148-071-13BBA1 and 148-071-
13BBA2.
GEOLOGY
The Lloyd landfill is located in an area of low relief,
with marshy areas to the the south, west, and north. The
geologic materials in the region include glacial till,
glacial outwash deposits, and ice-contact deposits. A small
outwash plain south of the landfill contains sand and gravel
beds with intervening areas of till (Bluemle, et al, 1967).
The area identified as outwash plain is about 1/4 mile from
the landfill. The total thickness of the Pleistocene
deposits ranges from 100 to 200 feet. The uppermost bedrock
unit in the area, the Cretaceous Pierre Formation, is
composed of shale, clay, and bentonite.
Six test holes drilled on the landfill property (Fig. 4)
encountered mainly clay and sandy-clay till (Fig. 5,
lithologic logs in Appendix A). A thin layer of sand and
gravel was observed near the surface in three of the test
holes. Additional thin gravel beds were encountered at
depths below 60 feet in several of the test holes. Bedrock
was penetrated at depths of 135 to 158 feet within the
landfill site.
7
![Page 12: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/12.jpg)
R71W[148-071-13BBB
148-071-13BBD1
1148-071-13BCC2
148-071-13BBA
Nt
R71W
Landfill Boundary Active Area Wetlands
61 0_-/Elevation in feet
above MSL (NGVD, 1929)
e)80-foot Test Hole 6 ri 160-foot Test Hole
Figure 4. Location of test holes at the Lloyd landfill.
8
![Page 13: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/13.jpg)
re)I A'
NCo
1550-
1500-
1450-
: ........ . - V ..
., . ..,1 * ***:
•% *.: '7 r......:,••••-:":: -: '. ,- • •••• , ' ''. ...1: :••:' •
.....'.0. •': ..
....• ... -. - ,,.
.•
• • ...-, . • • . •• ' ': -.!0 -......... ' .-,
• 0 '•••• -•, •,. . . .
CX, ' "1:Ci "; • '''' • . ' ':'''...• ;cr.... .. • .• •.
•N I •......... .. - • :.....
:•.,,c....-r.,.0-:;'• :-. ...,..::•:-.
.1 ..., .g ii '. . ': -- -• • -. • ...:....4.
Lor•-
A
0Elevation coin Feet
1600-
cocnrn
0c
HorizontalScale in Feet •
A'
NW 1/4Sec. 13
Till
Ej Sand
Gravel
el Pierre Fm.
I I0 100 200
VerticalExaggerationX 4
Refuse andCover Materials
— Test Hole Locations of Wellsand Cross Section
Figure 5. Geohydrologic Section A - A' in the Lloyd landfill
![Page 14: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/14.jpg)
HYDROLOGY
Surface-Water Hydrology
The Lloyd landfill is located about 3-1/2 miles south of
the James River. The James River should not be affected by
leachate migration from the landfill. The City of Fessenden
sewage lagoons are located about 1/2 mile northeast of the
landfill. No other surface water is located within a two-
mile radius of the landfill.
Ground-Water Hydrology
Five 160-foot borings and one 80-foot boring were
drilled around the landfill property (Figure 4). Based on
the depth to ground water and the thickness of till, no
monitoring wells were installed at the Lloyd landfill.
Consequently, no water samples were collected for water
quality analysis.
A two-foot thick layer of sand or gravel is located near
the land surface. Ground water may be moving laterally
through this layer and contributing to perched wetlands that
surround the active landfill. The wetlands may be
susceptible to surface-water runoff from the landfill.
Available data does not indicate a direct hydraulic
connection to other glacial or bedrock aquifers in the
vicinity of the landfill.
10
![Page 15: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/15.jpg)
An 80-foot test hole (Test Hole 148-071-13BBC1) was
drilled and left open for an 18-hour period to determine
recharge from the formation. There was no water movement out
of the till into the test hole during this time period.
Based on the results of this test, no monitoring wells were
installed within the glacial drift at this study site.
Ground-water supply wells, in a two-mile radius, are
screened at depths greater than 280 feet. These supply wells
should not be affected by leachate migration due to the large
thickness and low hydraulic conductivity associated with clay
till which is the dominant lithology in the landfill area.
CONCLUSIONS
The Lloyd landfill is located in an area of low relief
where the geologic materials include glacial till, glacial
outwash deposits, and ice-contact deposits. A thin layer of
sand and gravel was observed near the surface with additional
thin gravel beds at depths below 60 feet.
No surface water impoundments in the area of the
landfill that should be affected by leachate migration from
the landfill. Wetlands surrounding the landfill may be
recieving recharge from the thin shallow sand and gravel
layer. These wetlands may be susceptible to leachate
contamination from lateral ground-water flow in the shallow
sand and gravel layer and/or surface-water runoff from the
11
![Page 16: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/16.jpg)
landfill. Deeper sand and gravel lenses were dry at the time
of drilling. Production wells in the area are screened at
depths greater than 280 feet and should not be affected by
leachate migration because these bedrock aquifers are
overlain by a relatively thick, low-permeability clay till.
12
![Page 17: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/17.jpg)
REFERENCES
Bluemle, J.P., Faigle, G.A., Kresl, R.J., and Reid, J.R.,1967, Geology and ground water resources of WellsCounty, part I, geology: North Dakota GeologicalSurvey, Bulletin 51, North Dakota State WaterCommission, County Ground Water Studies 12, 39 p.
North Dakota Department of Health, 1986, Water wellconstruction and well pump installation: Article 33-18of the North Dakota Administrative Code.
13
![Page 18: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/18.jpg)
APPENDIX A
LITHOLOGIC LOGSOF WELLS AND TEST HOLES
14
![Page 19: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/19.jpg)
148-071-1388ANDSWC
Date Completed: 8/5/92 Purpose:Depth Drilled (ft): 160 Source of Data:L.S. Elevation (ft) 1599.53 Owner: J. Lloyd
Test Hole
Lithologic LogUnit Description Depth (ft)
TOPSOIL 0-2
GRAVEL FINE TO MEDIUM GRAIN, OXIDIZED, DARK YELLOW-ORANGE, 2-410YR6/6 TILL.
CLAY FINE SANDY, DARK YELLOW-ORANGE, 10YR6/6 OXIDIZED. 4-14
CLAY MEDIUM GRAY, N5, STIFF, ROCK AT 45'. 14-156
CLAY SILTY, LIGHT GRAY, N7,. 156-160
15
![Page 20: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/20.jpg)
148-071-13BBBNDSWC
Date Completed: 8/5/92 Purpose:Depth Drilled (ft): 160 Source of Data:L.S. Elevation (ft) 1598.86 Owner: J. Lloyd
Test Hole
Lithologic LogUnit Description Depth (ft)
TOPSOIL 0-2
CLAY FILL MATERIAL, CLAY, ROCKS. 2-5
CLAY FINE SAND, YELLOW-ORANGE, 10YR6/6, ROCK AT 15'. 5-17
CLAY MEDIUM GRAY, N5, STIFF, ROCK AT 21'. 17-68
GRAVEL MEDIUM GRAIN. 68-78
CLAY MEDIUM GRAY, N5. 78-88
CLAY SANDY, DARK GRAY, N3, GRAVEL INTER-MIXED. 88-91
CLAY MEDIUM GRAY, N5. 91-101
GRAVEL MEDIUM GRAIN, SHALE. 101-116
CLAY FINE SANDY, OLIVE GRAY,5Y4/1. 116-124
CLAY MEDIUM GRAY, N5, STIFF, TILL. 124-157
CLAY SILTY, LIGHT GRAY, N7. 157-160
16
![Page 21: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/21.jpg)
148-071-13BBC1*NDSWC
Date Completed: 7/6/92 Purpose:Depth Drilled (ft): 80 Source of Data:L.S. Elevation (ft) 1601.23 Owner: J. Lloyd
Test Hole
Lithologic LogUnit Description Depth (ft)
TOPSOIL 0-2
CLAY DUSKY YELLOW-GREEN, 5GY5/2. 2-8
CLAY MODERATE OLIVE BROWN 5Y4/4 8-13
CLAY TILL, MODERATE BROWN, 5YR4/4. 13-18
CLAY MEDIUM GRAY, N5, ROCK AT 55' WHICH MOVED TO THE SIDE 18-80
*Drilled with NDGS auger rigNote: Hole was left open over night and was dry the next day.
17
![Page 22: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/22.jpg)
148-071-13BBC2NDSWC
Date Completed: 8/4/92 Purpose:Depth Drilled (ft): 160 Source of Data:L.S. Elevation (ft) 1601.23 Owner: J. Lloyd
Test Hole
Lithologic LogUnit
Description Depth (ft)
TOPSOIL 0-7
CLAY SANDY, MODERATE YELLOW-BROWN, 10YR5/4, TILL. 7-8
CLAY SILTY, YELLOW-BROWN, STIFF, ROCK AT 13'. 8-17
CLAY MEDIUM GRAY, N5, STIFF, ROCKS AT 33', 51', 116v, 17-135
CLAY SILTY, LIGHT GRAY, N7, LIGNITE CHIPS. 135-143
CLAY BENTONITIC, VERY LIGHT GRAY, N8. 143-144
CLAY SANDY, STIFF, GRAYISH BLUE-GREEN, 5BG5/2. 144-152
CLAY STIFF, DARK GRAY, N3. 152-160
18
![Page 23: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/23.jpg)
148-071-13BBD1NDSWC
Date Completed: 8/4/92 Purpose:Depth Drilled (ft): 170 Source of Data:L.S. Elevation (ft) 1602.10 Owner: J. Lloyd
Test Hole
Lithologic LogUnit Description Depth (ft)
TOPSOIL 0-2
CLAY SILTY, MODERATE YELLOW-BROWN, 10YR5/4, TILL. 2-5
GRAVEL MEDIUM GRAIN, MODERATE YELLOW-BROWN, 10YR5/4. 5-7
SAND FINE-GRAINED, CLAYEY, MODERATE YELLOW-BROWN, 10YR5/4, 7-14ROCK AT 13'.
CLAY SANDY, STIFF, MODERATE YELLOW-BROWN, 10YR5/4. 14-17
CLAY MEDIUM GRAY, N5, STIFF, ROCKS AT 40', 64', 98'. 17-109
GRAVEL FINE TO MEDIUM GRAIN TO SANDY. 109-109.5
CLAY MEDIUM GRAY, N5, STIFF. 109.5-158
CLAY SILTY, STIFF, OLIVE-GRAY, 5Y4/1. 158-160
CLAY SILTY, OLIVE-GRAY, 5Y4/1, STIFF, LIGNITE CHIPS. 160-164
CLAY BENTONITIC, VERY LIGHT GRAY, N8, WITH GRAYISH BLUE-GREEN,164-1665BG5/2 SANDY CLAY, DRY.
CLAY SANDY, GRAYISH BLUE-GREEN, 5BG4/2, DRY. 166-170
19
![Page 24: Site Suitability Review of the Lloyd Sanitation Landfill · 2006. 6. 2. · The Lloyd solid waste landfill is one of the landfills being evaluated. Location of the Lloyd Landfill](https://reader033.vdocument.in/reader033/viewer/2022053120/60a41c7be54db7094b1e82e7/html5/thumbnails/24.jpg)
148-071-13BMNDSWC
Date Completed: 8/5/92 Purpose:Depth Drilled (ft): 160 Source of Data:L.S. Elevation (ft) 1599.31 Owner: J. Lloyd
Test Hole
Lithologic LogUnit Description Depth (ft)
TOPSOIL
GRAVEL
SAND
ROCK
CLAY
CLAY
GRAVEL
CLAY
CLAY
SILTSTONE
CLAY
MEDIUM GRAIN, TILL.
FINE-GRAINED, SILTY, DARK YELLOW-ORANGE,
LIGHT GRAY, N7, STIFF.
MEDIUM GRAY, N5, ROCK AT 29'-31'
FINE GRAIN.
MEDIUM GRAY, N5, STIFF.
SILTY, OLIVE-GRAY, 5Y4/1.
CEMENTED, OLIVE GRAY, 5Y4/1.
SANDY, GRAYISH BLUE-GREEN, 5BG5/2.
10YR6/6.
0-2
2-3
3-11
11-12
12-16
16-105.5
105.5-106
106-153
153-157
157-157.5
157.5-160
20