6601_NorthamptonCo_GWMR_DIN28007_20160316

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March 2016 Groundwater Monitoring Report

Northampton County Landfill Facility
NC Solid Waste Permit No. 66-01

Prepared for:

Northampton County Public Works
Jackson, North Carolina

May 2016

Prepared by:

© 2016 Smith Gardner, Inc.
This document is intended for the sole use of the client for which it was prepared and
for the purpose agreed on by the client and Smith Gardner, Inc.

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Northampton County Landfill March 2016 Groundwater Monitoring Report
May 2016 Table of Contents Page i
Northampton County Landfill
NC Solid Waste Permit No. 66-01

March 2016 Groundwater Monitoring Report

Table of Contents
Page

1.0 INTRODUCTION ......................................................................................................... 1 
2.0 SITE GEOLOGY ........................................................................................................... 1 
3.0 SAMPLING LOCATIONS ............................................................................................. 1 
4.0 SAMPLING PROCEDURES ......................................................................................... 1 
5.0 FIELD AND LABORATORY RESULTS .......................................................................... 2 
5.1 Field Results .............................................................................................................. 2 
5.2 Laboratory Analysis ................................................................................................... 2 
5.3 Laboratory Results .................................................................................................... 2 
5.3.1 Inorganic Constituents .................................................................................. 2 
5.3.2 Organic Constituents .................................................................................... 3 
6.0 GROUNDWATER CHARACTERIZATION ...................................................................... 3 
7.0 CONCLUSIONS .......................................................................................................... 3 

FIGURES
Figure 1 Groundwater Potentiometric Map

TABLES
Table 1 Groundwater Elevations
Table 2 Field Parameters
Table 3 Detected Inorganic Constituents
Table 4 Detected Organic Constituents

APPENDICES
Appendix A Well Logs
Appendix B Laboratory Analytical Results

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Northampton County Landfill March 2016 Groundwater Monitoring Report
May 2016 Page 1
1.0 INTRODUCTION
The closed, unlined Northampton County Landfill, Solid Waste Permit # 66-01, is required to
perform semi-annual groundwater monitoring in accordance with Solid Waste Section Rule 15A
NCAC 13B.0544. This location presently serves as a convenience center for county citizens
where the County collects white goods, used oil, shingles, electronics, used pesticide containers
and used tires. A pre-regulatory landfill (Jackson Refuse Disposal NONCD0000469) is located
to the northwest, accessible by an unpaved road from the northwestern portion of the landfill.
Northampton County owns the undeveloped property adjacent to the landfill on the north and
west.

This report presents the results from the groundwater monitoring event performed March 16,
2016 by Smith Gardner, Inc. (S+G) personnel; and includes laboratory analyses, summary tables
and a potentiometric map.
2.0 SITE GEOLOGY
The Northampton County Landfill is located north of the Town of Jackson, NC in the Inner
Coastal Plain Physiographic Province. According to the 1985 Geologic Map of North Carolina,
the Northampton County Landfill is located in an area underlain by the undivided Yorktown and
Duplin Formations. The Geology of the Carolinas1 describes both the Yorktown and the Duplin
as marine sediments and shelly sands over a thick blue-gray clay confining unit.

Available boring logs indicate silty sand at the surface with layers of fat clay generally around 30
and 40 feet below ground surface (bgs). Sand and gravel layers were also present either above
or below the fat clay layer. Site surface topography2 generally slopes west/northwest towards a
unnamed tributary of Gumberry Swamp.
3.0 SAMPLING LOCATIONS
The Northampton County Landfill monitoring network includes 9 groundwater monitoring wells
(MW-1, MW-2B, MW-3, MW-3D, MW-4, MW-5, MW-6, MW-7 and MW-8) for the facility. MW-8
was dry this event, therefore unable to be sampled. Available well logs and related well
construction information are presented in Appendix A.
4.0 SAMPLING PROCEDURES
S+G personnel conducted the monitoring network sampling event on March 16, 2016. Reported
sampling methods followed the protocol outlined in the North Carolina Water Quality Monitoring
Guidance Document for Solid Waste Facilities (Department of Environmental Quality (NCDEQ),

1 Horton, J. Wright, and Zullo, Victor, A., The Geology of the Carolinas, University of Tennessee Press, 1991.
2 USGS Jackson 7.5 Minute Quadrangle, 2013.

Northampton County Landfill March 2016 Groundwater Monitoring Report
May 2016 Page 2
Division of Waste Management (DWM)). The depth to water in each well was gauged to
determine groundwater depth then purged three to five well volumes or until dry. Water table
elevations are presented in Table 1.

Samples were collected in laboratory prepared containers for the specified analytical
procedures. Groundwater samples were properly preserved, placed on ice, and transported to
the laboratory facility (Prism Laboratories, Inc. NC Certification 402), within the specified hold
times for each analysis.
5.0 FIELD AND LABORATORY RESULTS
5.1 Field Results
Field measurements for pH, temperature, turbidity and specific conductance were
collected for each location sampled during this monitoring event and are included in
Table 2.
5.2 Laboratory Analysis
Samples were transported to Prism’s laboratory facility in Charlotte, NC under proper
chain of custody and analyzed for Appendix I constituents, including metals and volatile
organic compounds (VOCs) using the Solid Waste Section (SWS) approved methods
indicated on the laboratory report. The laboratory analytical report is included as
Appendix B.
5.3 Laboratory Results
Analytical results were compared to the NCDWM Solid Waste Section Quantitation
Limits (SWSLs)3, 15A NCAC 2L.0200 (2LStandard) and the United States Environmental
Protection Agency (EPA) established Federal Maximum Contaminant Limits (MCL) for
groundwater samples.

Most constituents were reported either below the laboratory established reporting limit
(RL) or were laboratory identified “J-values” indicating an estimated or non-quantifiable
value.
5.3.1 Inorganic Constituents
Barium (MW-6), chromium (MW-1) and lead (MW-3) were the only inorganic
parameters detected above their 2L Standards in samples collected this event.
The inorganic parameters antimony (MW-3), cobalt (MW-1, MW-2B, MW-3, MW-
4, MW-5, MW-6 and MW-7) and vanadium (MW-1) were reported above their GWP
Standards in collected samples.

3 New Guidelines for Electronic Submittal of Environmental Monitoring Data Memo, NCDENR – Solid Waste Section,
October 27, 2006

Northampton County Landfill March 2016 Groundwater Monitoring Report
May 2016 Page 3

Detected inorganic constituents are presented in Table 3.
5.3.2 Organic Constituents
Six organic constituents were detected above their 2L Standards in samples
collected this event:

 1,4-dichorobenzene (MW-4 and MW-7),
 Benzene (MW-2B, MW-3, MW-4, MW-6 and MW-7),
 Methylene Chloride (MW-4),
 Tetrachloroethene (MW-2B, MW-3D, MW-4, MW-5 and MW-6) and
 Vinyl chloride (MW-7)

Two parameters (m,p xylenes and o, xylene) were reported in collected samples,
however, no 2L Standard exists for those parameters.

Detected organic parameters are presented in Table 4.
6.0 GROUNDWATER CHARACTERIZATION
A potentiometric surface map was prepared from groundwater elevation data collected during
this sampling event. The data indicates that groundwater is generally flowing west away from
the landfill. Hydraulic conductivity data is not available for these wells; therefore, groundwater
velocities could not be calculated. The potentiometric surface map is provided as Figure 1.
7.0 CONCLUSIONS
Spring monitoring event results indicated detected concentrations of both inorganic and organic
constituents above the 2L Standard in samples collected during this event. Inorganic
constituents are naturally occurring in North Carolina soils, and high sample turbidity
influences results to be “biased high” due to these naturally occurring constituents. The
organic constituent detections are consistent with historical detections at the site, and are likely
due to the proximity of monitoring wells to the edge of waste.

The next groundwater monitoring event is scheduled for September 2016. A report with
laboratory analysis will be submitted to NCDENR in accordance with 15A NCAC 13B .0544.

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FIGURE

March 2016 Groundwater Monitoring Report
Northampton County Landfill
Solid Waste Permit No. 66-01

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MW1
TOC= 111.49
DTW= 11.69
GWE= 99.80
MW2A MW2BTOC= 111.09
DTW= 11.6
GWE= 99.49
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DTW= 11.47
GWE= 98.14
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DTW= 11.25
GWE= 98.82
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DTW= 33.78
GWE= 102.18
MW5
TOC= 127.48
DTW= 27.01
GWE= 100.47
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TOC= 137.51
DTW= 35.75
GWE= 101.76
MW7
TOC= 114.85
DTW= 15.87
GWE= 98.98
MW8
TOC= 98.84
DTW= DRY
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March 2016 Groundwater Monitoring Report
Northampton County Landfill
Solid Waste Permit No. 66-01

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2
8
.
8
MW
-
3

5
.
1
0

1
4
0

2
0
.
0

1
8
.
2
MW
-
3
D

4
.
9
5

1
5
0

1
9
.
5

2
.
8
4
MW
-
4

4
.
3
3

1
0
0

2
1
.
8

3
5
.
9
MW
-
5

4
.
8
9

8
0

2
0
.
5

3
8
.
1
MW
-
6

4
.
3
0

1
3
0

2
2
.
4

8
6
.
4
MW
-
7

5
.
8
0

1
5
0

1
4
.
6

8
0
.
4
NO
T
E
:
Fi
e
l
d

d
a
t
a

m
e
a
s
u
r
e
d

b
y

S
m
i
t
h

G
a
r
d
n
e
r
,

I
n
c
.

p
e
r
s
o
n
n
e
l
.
MW
-
8

w
a
s

u
n
a
b
l
e

t
o

b
e

s
a
m
p
l
e
d

t
h
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s

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v
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t
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A
L
N
A
S
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O
f
f
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c
e
_
S
h
a
r
e
\
P
r
o
j
e
c
t
s
\
G
r
o
u
n
d
w
a
t
e
r

M
o
n
i
t
o
r
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n
g
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2
.

G
r
o
u
n
d
w
a
t
e
r

M
o
n
i
t
o
r
i
n
g

R
e
p
o
r
t
s
\
N
o
r
t
h
a
m
p
t
o
n
\
2
.

M
a
r
2
0
1
6
\
m
a
r
1
6

N
H

g
w

t
a
b
l
es
.
x
l
s
x
Ta
b
l
e

3
De
t
e
c
t
e
d

I
n
o
r
g
a
n
i
c

C
o
n
s
t
i
t
u
e
n
t
s
No
r
t
h
a
m
p
t
o
n

C
o
u
n
t
y

L
a
n
d
f
i
l
l
Ma
r
c
h

1
6
,

2
0
1
6
By: YD Date: 4/6/2016
MD
L

R
L

S
W
S
L
2L

o
r

G
W
P
*

St
a
n
d
a
r
d
MC
L

M
W
-
1

M
W
-
2
B

M
W
-
3

M
W
-
3
D

M
W
-
4

M
W
-
5

M
W
-
6

M
W
-
7
An
t
i
m
o
n
y

0
.
0
6
9

1

6

1

*

6

0
.
0
9
9

J

B
R
L
1.
9
BR
L

0
.
1
9

J

B
R
L

B
R
L

0
.
1
2

J
Ar
s
e
n
i
c

0
.
2
9

1

1
0

1
0

1
0

2
.
6

0
.
8
8

J

0
.
5
5

J

1
.
3

1
.
3

0
.
5
8

J

0
.
9
6

J

3
.
5
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r
i
u
m

0
.
0
4
1

5

1
0
0

7
0
0

2
0
0
0

8
5

2
9
0

1
4
0

3
9
0

2
0
0

1
9
0
79
0
450
Be
r
y
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l
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u
m

0
.
0
4
7

1

1

4

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4

0
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4
5

J

0
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6
3

J

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R
L

0
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1
8

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2
2

J

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3
6

J

0
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4
8

J

0
.
0
5
3

J
Ca
d
m
i
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m

0
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0
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9

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1

2

5

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4
9

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0
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4
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J

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3
5

J

0
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4
2

J

0
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3
7

J

0
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4
5

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0
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4
8

J

0
.
3
6

J
Ch
r
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m
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u
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,

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o
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a
l

0
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5
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1

1
0

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4

1
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2

1
.
1

1
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1

3
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3

3
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3

3
.
2
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b
a
l
t

0
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0
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3

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1
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1

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E
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9

5
5

3
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4
4

J
33

8
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1

8
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5
0
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p
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0
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4
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5

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2
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6

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1
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7

J

2
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2

J

0
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9
0

J

2
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0

J

2
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0

J

3
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9

J

2
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4

J
Le
a
d

0
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0
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1

1
0

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5

1
5

2
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7

1
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2
75
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3
9

J

2
.
2

0
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7
5

J

4
.
5

2
.
3
Ni
c
k
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l

0
.
0
5
3

2

5
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1
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0

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4
.
9

4
.
5

1
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0

J

2

2
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7

6
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7

6
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7
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r

0
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0
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1

1
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0
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0
4
7

J

0
.
0
6
9

J

0
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0
2
4

J

0
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0
2
6

J

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0
5
4

J

0
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0
2
1

J

0
.
0
6
0

J

0
.
0
1
7

J
Th
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l
l
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m

0
.
0
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9
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1

6

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2
8

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0
.
2
3

J

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.
2
6

J

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.
7
0

J

0
.
1
7

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.
1
1

J

0
.
1
8

J

0
.
3
1

J

0
.
3
9

J
Va
n
a
d
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m

2
.
5
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5

2
5

0
.
3

*

N
E
14
3.
0

J

B
R
L

B
R
L

B
R
L

4
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8

J

4
.
5

J

4
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9

J
Zi
n
c

0
.
9
8

1
0

1
0

1
0
0
0

5
0
0
0

4
2

2
3

1
2

8
.
4

J

1
1

2
9

2
4

1
3
NO
T
E
:
MD
L

-
Me
t
h
o
d

D
e
t
e
c
t
i
o
n

L
i
m
i
t
RL

-
La
b
o
r
a
t
o
r
y e
s
t
a
b
l
i
s
h
e
d

r
e
p or
t
i
n
g l
i
m
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t
SW
S
L

-
So
l
i
d

W
a
s
t
e

S
e
c
t
i
o
n

Q
u
a
n
t
i
t
a
t
i
o
n

L
i
m
i
t
s
2L
-
Gr
o
u
n
d
w
a
t
e
r

S
t
a
n
d
a
r
d
s

(
1
5
A

N
C
A
C

2
L

0
2
0
0
)
GW
P
-
Gr
o
u
n
d
w
a
t
e
r

P
r
o
t
e
c
t
i
o
n

S
t
a
n
d
a
r
d
s

(
n
o
t
e
d

b
y *
)
MC
L
-
Fe
d
e
r
a
l

M
a
x
i
m
u
m

C
o
n
t
a
m
i
n
a
n
t

L
i
m
i
t
Bo
l
d
-
De
t
e
c
t
i
o
n

a
b
o
v
e

2
L

o
r

G
W
P

S
t
a
n
d
a
r
d
J-
La
b
o
r
a
t
o
r
y d
e
f
i
n
e
d

a
s

d
e
t
e
c
t
e
d

b
u
t

b
e
l
o
w

t
h
e

R
e
p or
t
i
n
g L
i
m
i
t
,

t
h
e
r
e
f
o
r
e

t
h
e

v
a
l
u
e

i
s

a
n

e
s
t
i
m
a
t
e
d

c
o
n
c
e
n
t
r
a
t
i
o
n
BR
L

-
No
t

d
e
t
e
c
t
e
d

a
t

o
r

a
b
o
v
e

R
L
NE

-

S
t
a
n
d
a
r
d

N
o
t

E
s
t
a
b
l
i
s
h
e
d
Ta
b
l
e

u
n
i
t
s

a
r
e

p
r
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s
e
n
t
e
d

i
n

u
g
/
l
.
La
b

a
n
a
l
y
s
i
s

b
y

P
r
i
s
m

L
a
b
o
r
a
t
o
r
i
e
s
,

r
e
p
o
r
t

d
a
t
e
d

3
/
3
0
/
2
0
1
6
.
MW
-
8

w
a
s

u
n
a
b
l
e

t
o

b
e

s
a
m
p
l
e
d

t
h
i
s

e
v
e
n
t
.
\\
R
A
L
N
A
S
\
O
f
f
i
c
e
_
S
h
a
r
e
\
P
r
o
j
e
c
t
s
\
G
r
o
u
n
d
w
a
t
e
r

M
o
n
i
t
o
r
i
n
g
\
2
.

G
r
o
u
n
d
w
a
t
e
r

M
o
n
i
t
o
r
i
n
g

R
e
p
o
r
t
s
\
N
o
r
t
h
a
m
p
t
o
n
\
2
.

M
a
r
2
0
1
6
\
m
a
r
1
6

N
H

g
w

t
a
b
l
es
.
x
l
s
x
Ta
b
l
e

4
De
t
e
c
t
e
d

O
r
g
a
n
i
c

C
o
n
s
t
i
t
u
e
n
t
s
No
r
t
h
a
m
p
t
o
n

C
o
u
n
t
y

L
a
n
d
f
i
l
l
Ma
r
c
h

1
6
,

2
0
1
6
By: YD Date: 4/6/2016
MD
L

R
L

S
W
S
L
2L

St
a
n
d
a
r
d
MC
L

M
W
-
2
B

M
W
-
3

M
W
-
3
D

M
W
-
4

M
W
-
5

M
W
-
6

M
W
-
7
Be
n
z
e
n
e

0
.
0
4
8

0
.
5
0

1

1

5
1.
7

1
.
1
BR
L
7.
4
0.
7
5
2.
3

3
.
6
1,
4

D
i
c
h
l
o
r
o
b
e
n
z
e
n
e

0
.
0
5
0

0
.
5
0

1

6

7
5

1
.
5

1
.
6

B
R
L
20
0.
9
8

0
.
8
3
9.
2
1,
1
-
D
i
c
h
l
o
r
o
e
t
h
a
n
e

0
.
0
8
3

0
.
5
0

5

6

N
E

2
.
6

B
R
L

0
.
5
1

5
.
1

0
.
5
3

1
.
2

3
.
9
Ch
l
o
r
o
b
e
n
z
e
n
e

0
.
0
6
2

0
.
5
0

3

5
0

1
0
0

4
.
3

1
4

B
R
L

1
1

2
.
3

0
.
7
8

3
9
Ch
l
o
r
o
e
t
h
a
n
e

0
.
2
2
0

0
.
5
0

1
0

3
0
0
0

N
E

B
R
L

B
R
L

B
R
L

1
.
9

B
R
L

B
R
L

B
R
L
ci
s
-
1
,
2
-
D
i
c
h
l
o
r
o
e
t
h
y
l
e
n
e

0
.
0
5
6

0
.
5
0

5

7
0

N
E

2
.
1

B
R
L

0
.
6
2

1
8

1
.
1

2
.
4

1
3
m,
p -X
y
l
e
n
e
s

0
.
1
2
0

1
.
0
0

N
E

N
E

N
E

B
R
L

B
R
L

B
R
L

6
.
2

B
R
L

B
R
L

B
R
L
Me
t
h
y
l
e
n
e

C
h
l
o
r
i
d
e

0
.
0
8
3

1
.
0
0

1

5

N
E

2
.
2

B
R
L

B
R
L
7.
8
2.
6

2
.
2

B
R
L
o-
X
y
l
e
n
e

0
.
0
4
4

0
.
5
0

N
E

N
E

N
E

B
R
L

B
R
L

B
R
L

6
.
2

B
R
L

0
.
7
9

B
R
L
Te
t
r
a
c
h
l
o
r
o
t
h
y
l
e
n
e

0
.
0
9
8

0
.
5
0

1

0
.
7

5
0.
8
3
BR
L
0.
9
6

1
.
8

1
.
1

2
BR
L
Vi
n
y
l

c
h
l
o
r
i
d
e

0
.
0
9
7

0
.
5
0

1

0
.
0
3

2

B
R
L

B
R
L

B
R
L

B
R
L

B
R
L

B
R
L
1.
6
Xy
l
e
n
e
s

0
.
1
5
0

3
.
0
0

5

5
0
0

1
0
0
0
0

B
R
L

B
R
L

B
R
L

1
2

B
R
L

0
.
7
9

J

B
R
L
NO
T
E
MD
L

-
Me
t
h
o
d

D
e
t
e
c
t
i
o
n

L
i
m
i
t
RL

-
La
b
o
r
a
t
o
r
y e
s
t
a
b
l
i
s
h
e
d

r
e
p or
t
i
n
g l
i
m
i
t
SW
S
L

-
So
l
i
d

W
a
s
t
e

S
e
c
t
i
o
n

Q
u
a
n
t
i
t
a
t
i
o
n

L
i
m
i
t
s
2L
-
Gr
o
u
n
d
w
a
t
e
r

S
t
a
n
d
a
r
d
s

(
1
5
A

N
C
A
C

2
L

0
2
0
0
)
MC
L

-

F
e
d
e
r
a
l

M
a
x
i
m
u
m

C
o
n
t
a
m
i
n
a
n
t

L
i
m
i
t
Bo
l
d
-
De
t
e
c
t
i
o
n

a
b
o
v
e

2
L

S
t
a
n
d
a
r
d
J-
La
b
o
r
a
t
o
r
y d
e
f
i
n
e
d

a
s

d
e
t
e
c
t
e
d

b
u
t

b
e
l
o
w

t
h
e

R
e
p or
t
i
n
g L
i
m
i
t
,

t
h
e
r
e
f
o
r
e

t
h
e

v
a
l
u
e

i
s

a
n

e
s
t
i
m
a
t
e
d

c
o
n
c
e
n
t
r
a
t
i
o
n
BR
L

-
No
t

d
e
t
e
c
t
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x

APPENDIX A
Well Logs

March 2016 Groundwater Monitoring Report
Northampton County Landfill
Solid Waste Permit No. 66-01

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APPENDIX B
Laboratory Analytical Results

March 2016 Groundwater Monitoring Report
Northampton County Landfill
Solid Waste Permit No. 66-01

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