4116_HighPointResponsetoHydroComments_DIN26897_20161014

October 14, 2016

Ms. Christine Ritter,
Permitting Hydrogeologist
NC DEQ, Division of Waste Management
1646 Mail Service Center
Raleigh, NC 27699-1646

RE: WI High Point C&D Landfill – Phase 3 (SWS Permit No. 41-16)
Response to Comments – Permit Renewal, Hydrogeology Review
High Point, North Carolina

Dear Ms. Ritter:

Smith Gardner Inc. (S+G) is pleased to respond to your September 15, 2016 comments
(Attached) on behalf of Waste Industries’ High Point Construction and Demolition Debris
(C&D) Solid Waste Facility. Please find our responses (bold) corresponding to your
comments presented in italics.

Comment 1
Attachment K – Design Hydrogeologic Report, Section 3.0 Geology and Groundwater
Characteristics, 3.1 Surface Topography and Drainage: Paragraph 3 states that “The Phase 3
expansion, as proposed, will impact wetlands and streams. …an Individual Permit has been
submitted to the U.S. Army Corps of Engineers and NC DEQ for review. Following approval,
those documents will be submitted to NC DEQ.”
Please submit the approved documents/permits or provide information regarding status of
the reviews.

The approved permit documents from the U.S. ACE are imminent and will be forwarded to
your office upon receipt.

Comment 2
Attachment K – Design Hydrogeologic Report, Tables and Figures: Table 2A lists longterm
seasonal high (LTSH) elevation for GW2 as 778.57 and for GW3 as 755.89 feet above mean sea
level. However, both in Figure 6 Hydrogeologic Cross Sections and in Figure 7 Long Term
Seasonal High Potentiometric Surface Map, LTSH groundwater elevation is depicted for GW3
as 782.79 and for GW2 as 755.76 feet above mean sea level.

Please clarify these significant differences and revise the drawings as necessary to reflect
the accurate LTSH groundwater elevations.

Response: Groundwater elevations related to GW-2 and GW-3 were misrepresented in both
the table and figures 6 and 7. Table 2A, Figure 6 and Figure 7 have been revised to reflect
the correct groundwater elevations for those locations. A revised Table 2A, Figure 6 and
Figure 7 are attached.
DocuSign Envelope ID: 58ADE5F1-852E-4B7C-BFA4-BAA77670D9E2
Ms. Christine Ritter
October 14, 2016
Page 2 of 2
Comment 3
Attachment M – Landfill Gas Monitoring Plan: Please add Hydrogen Sulfide to the Landfill
Gas Monitoring Form and include hydrogen sulfide in addition to methane in the text portion
of the Landfill Gas Monitoring Plan.

Response: The LFG plan has been revised to include hydrogen sulfide within the text as well
as on the monitoring form. A revised LFG Monitoring Plan is attached.

Please contact us if you have any questions or require additional information, at 919-828-
0577, or by email below.

Sincerely,
SMITH GARDNER, INC.

Madeline German, P.G. Joan A. Smyth, P.G.
Project Geologist Senior Hydrogeologist
[e-mail] [e-mail]

Attachments: September 15, 2016 letter from Christine Ritter
Revised Table 2A, Figure 6 and Figure 7
Revised Landfill Gas Monitoring Report

cc: Seth Heath, Waste Industries
David Pepper, Waste Industries
Ed Mussler, NCDEQ
File
DocuSign Envelope ID: 58ADE5F1-852E-4B7C-BFA4-BAA77670D9E2
Attachment 1

DocuSign Envelope ID: 58ADE5F1-852E-4B7C-BFA4-BAA77670D9E2
9/16/2016 Smith Gardner, Inc Mail ­ PTC Application for WI High Point CDLF ­ Phase 3 comments
https://mail.google.com/mail/?ui=2&ik=c5b7b40f3f&view=pt&search=inbox&th=1572f7f5ae2f774d&siml=1572f7f5ae2f774d 1/3
Madeline German <[e-mail]>
PTC Application for WI High Point CDLF ­ Phase 3 comments
1 message
Ritter, Christine <[e-mail]>Thu, Sep 15, 2016 at 4:17 PM
To: "Madeline German ([e-mail])" <[e-mail]>, "Joan Smyth
([e-mail])" <[e-mail]>
Cc: "Mussler, Ed" <[e-mail]>
DIN 26730

Madeline and Joan­

Following are my comments pertaining to the Design Hydrogeologic Report, Water Quality Monitoring Plan and Landfill
Gas Monitoring Plan submitted as part of the Permit to Construction Application for the WI High Point C&D Landfill –
Phase 3:

Attachment K – Design Hydrogeologic Report

Section 3.0 Geology and Groundwater Characteristics

3.1 Surface Topography and Drainage
Paragraph 3 states that “The Phase 3 expansion, as proposed, will impact wetlands and streams.  …an Individual
Permit has been submitted to the U.S. Army Corps of Engineers and NC DEQ for review.  Following approval, those
documents will be submitted to NC DEQ.”

Please submit the approved documents/permits or provide information regarding status of the reviews.

Table 2A lists long­term seasonal high (LTSH) elevation for GW­2 as 778.57 and for GW­3 as 755.89 feet above mean
sea level.

However, both in Figure 6 Hydrogeologic Cross Sections and in Figure 7 Long Term Seasonal High Potentiometric
Surface Map, LTSH groundwater elevation is depicted for GW­3 as 782.79 and for GW­2 as 755.76 feet above mean sea
level.  Please clarify these significant differences and revise the drawings as necessary to reflect the accurate LTSH
groundwater elevations.

Attachment L – Water Quality Monitoring Plan

No additional comments.

DocuSign Envelope ID: 58ADE5F1-852E-4B7C-BFA4-BAA77670D9E2
9/16/2016 Smith Gardner, Inc Mail ­ PTC Application for WI High Point CDLF ­ Phase 3 comments
https://mail.google.com/mail/?ui=2&ik=c5b7b40f3f&view=pt&search=inbox&th=1572f7f5ae2f774d&siml=1572f7f5ae2f774d 2/3
Attachment M – Landfill Gas Monitoring Plan

Please add Hydrogen Sulfide to the Landfill Gas Monitoring Form and include hydrogen sulfide in addition to methane in
the text portion of the Landfill Gas Monitoring Plan.

If you have any questions, please feel free to contact me.

Thank you,

Christine

Christine Ritter
Hydrogeologist
Solid Waste Section
Division of Waste Management
NC Dept of Environmental Quality

919 707 8254    office
[e-mail]

Mailing address:
1646 Mail Service Center
Raleigh, North Carolina 27699­1646

Physical address:
217 West Jones Street
Raleigh, NC 27603

Email correspondence to and from this address is subject to the
DocuSign Envelope ID: 58ADE5F1-852E-4B7C-BFA4-BAA77670D9E2
Attachment 2

DocuSign Envelope ID: 58ADE5F1-852E-4B7C-BFA4-BAA77670D9E2
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3
By: MG Date:5/11/16
We
l
l
Fo
o
t
p
r
i
n
t
P-
1
6
P-
2
6
S
P-
2
6
D
P-
2
8
P-
2
9
HA
-
1
HA
-
3
GW
-
2
GW
-
3
Ne
a
r
b
y
P-
2
P-
7
P-
9
P-
1
0
P-
1
1
P-
2
7
P-
3
0
S
P-
3
0
D
HA
-
4
GW
-
1
3/
1
1
/
0
2

3
/
1
4
/
0
2

3
/
1
5
/
0
2

3
/
1
9
/
0
2

3
/
2
1
/
0
2

3
/
2
6
/
0
2

3
/
2
8
/
0
2

4
/
1
/
0
2

4
/
2
/
0
2

4
/
5
/
0
2

4
/
8
/
0
2

4
/
1
1
/
0
2

4
/
1
6
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0
2

4
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1
9
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2

4
/
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3
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2

5
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2
77
0
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8
9

7
7
1
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2
4

7
7
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4

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7
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7
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5
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6
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2
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7
6
8
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4
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7
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2
6
NA

N
A

N
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N
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N
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N
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N
A

N
A

N
A

N
A

N
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N
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N
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N
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N
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NA

N
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N
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N
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N
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N
A

N
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N
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N
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N
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N
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N
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N
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N
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N
A

N
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NA

N
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N
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N
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N
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N
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N
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N
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N
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N
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N
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N
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N
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N
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N
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N
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NA

N
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N
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N
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N
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N
A

N
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N
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N
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76
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4
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4
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7
6
8
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3
3

7
6
8
.
2
8

7
6
8
.
1
3
NA

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
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A

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N
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NA

N
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NA

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N
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N
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N
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N
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N
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79
3
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7
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7
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7
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NA

N
A

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H:
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3
By: MG Date:5/11/16
We
l
l
Fo
o
t
p
r
i
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t
P-
1
6
P-
2
6
S
P-
2
6
D
P-
2
8
P-
2
9
HA
-
1
HA
-
3
GW
-
2
GW
-
3
Ne
a
r
b
y
P-
2
P-
7
P-
9
P-
1
0
P-
1
1
P-
2
7
P-
3
0
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P-
3
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D
HA
-
4
GW
-
1
5/
9
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0
2

5
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1
7
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3
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5
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3
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2

6
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2

6
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2

1
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2

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7
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NA

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7
9
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1
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7
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6
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NA

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7
8
9
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7
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0
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0
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NA

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N
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N
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N
A

N
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N
A

N
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N
A

N
A

N
A

N
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1
6
5
.
5
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7
6
5
.
6

7
6
5
.
9
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NA

N
A

N
A

N
A

N
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N
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N
A

N
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N
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N
A

N
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7
4
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7
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7
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76
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7
6
8
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7
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7
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7
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N
A

N
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7
6
8
.
4
6

7
6
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1
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NA

N
A

N
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N
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N
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N
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N
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N
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N
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N
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N
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N
A

7
4
9
.
1

7
5
0
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1
9

7
5
0
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1
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NA

N
A

N
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N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
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N
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NA

N
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N
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N
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N
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N
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N
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N
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N
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N
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N
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79
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7
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7
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7
9
4
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1
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7
9
4
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4
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N
A

N
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A

N
A
77
7
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2
2

7
7
7
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1
3

7
7
6
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0
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7
7
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3
3

7
7
7
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5
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7
7
7
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N
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N
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7
7
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78
4
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6
9

7
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4
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3
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7
8
4
.
5
1

7
8
5
.
0
1

7
8
9
.
3
1

N
A

N
A

N
A

N
A
76
6
.
3
2

7
7
1
.
3
7

7
6
6
.
3
9

7
6
6
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4
3

7
6
6
.
3
7

7
6
6
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3
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7
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3
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7
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7
6
6
.
0
7

7
6
6
.
1
8

7
6
6
.
1
8

7
6
6
.
3
7

N
A

N
A

N
A

N
A
74
1
.
0
9

7
4
1
.
1
4

7
4
1
.
1
8

7
4
1
.
2
3

7
4
1
.
2
4

7
4
1
.
2
4

7
6
5
.
8
9

7
4
4
.
9
7

7
4
0
.
9
9

7
4
2
.
0
6

7
4
2
.
4
5

N
A

7
4
6
.
2
5

7
4
6
.
1
8

7
4
6
.
0
3
NA

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

7
7
7
.
8
5

7
7
7
.
9
9

7
7
7
.
7
NA

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

7
3
1
.
5
2

7
3
1
.
3
2
NA

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

7
3
0
.
5
7

7
3
0
.
7
7

7
3
0
.
6
5
NA

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

7
3
3
.
7
7

7
3
4
.
1
4

7
3
3
.
9
4
NA

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A

N
A
H:
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Landfill Gas Monitoring Plan

WI High Point C&D Landfill
Guilford County, North Carolina (SWS Permit No. 41-16)

Prepared for:

WI High Point, LLC.
Jamestown, North Carolina
(A Subsidiary of Waste Industries, USA. Inc.)

Revised October 2016
May 2016

© 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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Landfill Gas Monitoring Plan

WI High Point C&D Landfill Facility
Guilford County, North Carolina

Prepared For:
WI High Point, LLC.
Jamestown, North Carolina
(A Subsidiary of Waste Industries, Inc.)

S+G Project No. WI HIGH POINT-16-1

Madeline German, P.G.
Project Geologist

Joan A. Smyth, P.G.
Senior Hydrogeologist

Revised October 2016
May 2016

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10/14/2016
10/14/2016

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WI High Point C&D Landfill Landfill Gas Monitoring Plan
Revised October 2016 Table of Contents Page i
WI High Point, LLC.
WI High Point C&D Landfill Facility
Landfill Gas Monitoring Plan

Table of Contents
Page

1.0 INTRODUCTION ................................................................................................................... 1
1.1 Regulatory Requirements – C&D Landfills .............................................................. 1
1.2 Guidance Document .................................................................................................. 2
1.3 Contact Information .................................................................................................. 2
1.3.1 WI High Point, LLC ........................................................................................ 2
1.3.2 Waste Industries, USA, Inc. .......................................................................... 2
1.3.3 Engineer ........................................................................................................ 2
1.3.4 North Carolina Department of Environmental Quality ................................ 2
1.4 Existing Site Conditions ............................................................................................. 3
1.4.1 Site Geology ................................................................................................... 3
1.4.2 Local Groundwater Regime .......................................................................... 3
2.0 MONITORING PROGRAM .................................................................................................... 4
2.1 Monitoring Points ...................................................................................................... 4
2.2 Facility Structure Monitoring .................................................................................... 4
2.3 Monitoring and Reporting ......................................................................................... 4
2.3.1 Frequency ...................................................................................................... 4
2.3.2 Personnel ...................................................................................................... 5
2.3.3 Equipment ..................................................................................................... 5
2.3.4 Procedures .................................................................................................... 5
2.3.5 Precautionary Action Plan ............................................................................ 6
2.3.6 Record Keeping ............................................................................................. 7
2.4 Maintenance .............................................................................................................. 7
3.0 CONTINGENCY PLAN .......................................................................................................... 8
3.1 Immediate Action Plan .............................................................................................. 8
3.1.1 Reporting and Documentation ...................................................................... 8
3.2 Remediation Plan ...................................................................................................... 8

FIGURE
Figure 1 Monitoring Location Map
Figure 2 Flowchart of Methane Monitoring Requirements

APPENDIX
Appendix A Reporting Forms

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Revised October 2016 Table of Contents Page ii

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WI High Point C&D Landfill Landfill Gas Monitoring Plan
Revised October 2016 Page 1

1.0 INTRODUCTION
This Landfill Gas (LFG) Monitoring Plan (plan) was prepared by Smith Gardner, Inc. (S+G) to
describe the LFG monitoring program at the WI High Point C&D Landfill owned and operated by
WI High Point, LLC. (NC Solid Waste Permit 41-16), which is located at 5830 Riverdale Road,
Jamestown, North Carolina. This plan describes the necessary procedures to satisfy applicable
regulatory requirements (Section 1.1) for landfill gas monitoring.

The best available site data, practices, experience and judgment were utilized to develop this
plan. However, the plan may require modifications over time to accommodate changing landfill
conditions, changing receptors in areas adjacent to and around the landfill, or other conditions
that cannot be fully anticipated.

Uncontrolled migration of LFG (particularly methane (CH4)) can result in, loss of life, injury, loss
of property, vegetative damage, and intolerable odors. Landfill monitoring includes exposure to
explosive gases. Monitoring personnel should be specifically trained in the management and
response for situations such as fire or explosion and confined space entry and possess an
awareness of changing conditions around the landfill.

Note that this plan does not address landfill gas collection and control, air quality, or other
related landfill gas regulations or requirements which may be applicable to this site at present
or in the future.
1.1 Regulatory Requirements – C&D Landfills
Rule 15A NCAC 13B.0544(d) of the North Carolina Solid Waste Management Rules
requires the following for facilities having a C&D landfill:

• Owners or operators of C&D landfill units must ensure that:
o the concentration of methane gas or other explosive gases generated by
the facility does not exceed 25 percent of the lower explosive limit in on-
site facility structures (excluding gas control or recovery system
components);
o the concentration of methane gas or other explosive gases does not
exceed the lower explosive limit for methane or other explosive gases at
the facility property boundary; and
o the facility does not release methane gas or other explosive gases in any
concentration that can be detected in off-site structures.

• Owners or operators of C&D landfill units must implement a routine methane
monitoring program and perform monitoring on at least a quarterly basis.

• If regulatory limits for methane gas concentrations are exceeded, a contingency
plan must be implemented for the protection of human health and safety.

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WI High Point C&D Landfill Landfill Gas Monitoring Plan
Revised October 2016 Page 2
1.2 Guidance Document
This plan was developed generally following the Landfill Gas Monitoring Guidance
document prepared by the North Carolina Department of Environment Quality (NC DEQ),
Division of Waste Management (DWM)1.
1.3 Contact Information
Correspondence and questions concerning this plan should be directed to the
appropriate contact below. For fire or police emergencies, dial 911.:
1.3.1 WI High Point, LLC
5830 Riverdale Road
Jamestown, North Carolina 27282
Scale House Phone: [phone]
FAX: [phone]
Contacts: Seth Heath, General Manager
[e-mail]
1.3.2 Waste Industries, USA, Inc.
3301 Benson Drive, Suite 600
Raleigh, North Carolina 27609
Phone: [phone]
FAX: [phone]
Contacts: Brent Kirchoff, Region Manager
[e-mail]
1.3.3 Engineer
Smith Gardner, Inc.
14 N. Boylan Avenue
Raleigh, North Carolina 27603
Phone: [phone]
Contacts: Joan A. Smyth, P.G., Senior Hydrogeologist
[e-mail]
Stacey A. Smith, P.E., Senior Engineer
[e-mail]
1.3.4 North Carolina Department of Environmental Quality
North Carolina DEQ - Raleigh Central Office (RCO)

1 NC DENR DWM (2010), “Landfill Gas Monitoring Guidance”, NC DENR DWM Solid Waste Section,
November 2010.
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WI High Point C&D Landfill Landfill Gas Monitoring Plan
Revised October 2016 Page 3
217 W Jones Street
Raleigh, North Carolina 27603
Phone: [phone]
Contact: Ms. Christine Ritter
[e-mail]

North Carolina DEQ – Winston-Salem Regional Office
585 Waughtown Street
Winston-Salem, North Carolina 27107
Phone: [phone]
Fax: [phone]
Contacts: Mathew Gantt, P.E. Regional Engineer (WSRO)
[e-mail]
Shannon Leonard, Environmental Engineer I (WSRO)
[e-mail]
1.4 Existing Site Conditions
The facility is located at 5830 Riverdale Road in southern Guilford County off Kivett Drive.
The approximately 158 acre facility is located approximately 6 miles east of High Point,
in Guilford County. Area development is a mix of agricultural, industrial/ commercial
and landfill use. In general, development in the area is primarily along the main roads.
The site and surrounding area are shown on Figure 1.
1.4.1 Site Geology
The WI High Point C&D Landfill facility is located in the North Carolina Piedmont
Physiographic Province characterized by moderately rolling valleys and ridges.
The Geologic Map of North Carolina (USGS, 1985) indicates that the site lies
within the Carolina Slate Belt; Late Proterozoic to Cambrian age volcanic and
sedimentary rock metamorphosed to lower greenshist facies with multiple
intrusions. The site is underlain by white to gray, fine to coarse grained, granitic
rock.
1.4.2 Local Groundwater Regime
The hydrogeology at this site has been investigated using, groundwater
monitoring wells and aquifer slug tests. Groundwater flows primarily southwest,
towards Richland Creek and its tributaries, with additional flow south and west.
Richland Creek is approximately 1300 feet from the facility boundary and flows
into Deep River. The uppermost aquifer is saprolite, partially weathered rock
(PWR) along with granitic bedrock. Groundwater occurs from approximately ten
feet below grade or less in the downgradient wells near the Richland Creek
tributaries to twenty-five feet below grade upgradient of the waste area. Locally,
the C&D site is bounded Richland Creek and its tributaries to the west and south.
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WI High Point C&D Landfill Landfill Gas Monitoring Plan
Revised October 2016 Page 4
2.0 MONITORING PROGRAM
Currently landfill gas at the site is monitored quarterly by advancing bar-hole punches at each
landfill monitoring point location. Bar-hole punch technology is used, rather than permanent
monitoring wells, due to the shallow nature of groundwater and bedrock at the site. The plan
contained herein includes the continued program for advancement of bar-hole punch locations
to monitor for subsurface landfill gas migration as well as landfill gas monitoring in on-site
structures.
2.1 Monitoring Points
Streams are located adjacent to or within the property boundary to the northwest and
southwest; limiting the possibility of landfill gas migration in these directions.
Therefore, landfill gas monitoring points are focused along the northern and eastern
property line where residential development is more predominant and surface water
bodies do not prevent LFG migration off the property. The existing landfill gas
monitoring locations include BH-1 through BH-5. These are bar-hole punch locations
that have been monitored quarterly at the site.

Existing monitoring locations are shown on Figure 1. No additional monitoring locations
are proposed at this time.
2.2 Facility Structure Monitoring
Occupied structures on the property will be monitored quarterly. The following facility
structures will be monitored:

• Scalehouse; and
• Maintenance Building.

If desired, a dedicated methane monitor may be installed within one or more of these
structures. Otherwise, monitoring will be conducted quarterly with the landfill gas
monitoring points.
2.3 Monitoring and Reporting
Monitoring and reporting of LFG concentrations will be performed as outlined below.
During these events the following LFG constituents will be monitored: methane,
hydrogen sulfide, oxygen and carbon dioxide.
2.3.1 Frequency
Routine LFG monitoring will be conducted on a quarterly basis.

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WI High Point C&D Landfill Landfill Gas Monitoring Plan
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2.3.2 Personnel
LFG monitoring will be performed by personnel who are familiar with the
requirements of this plan and who are trained in LFG hazards and explosive gas
meter use. As practical, a designated technician will be assigned to regular LFG
monitoring duty.
2.3.3 Equipment
A portable gas analyzer will be used to monitor barhole locations and LFGCCS
components (if applicable). This analyzer, which is calibrated to methane (CH4),
operates using the infrared spectral property of methane to measure
concentrations in air. Measurements of hydrogen sulfide (H2S), oxygen (O2) and
carbon dioxide (CO2) will also be made with this meter. This meter may be used
in oxygen deficient areas (less than 10% O2) since oxygen is not required for a
chemical combustion of flammable gases within the meter.

On the day of monitoring, prior to monitoring activities, this meter will be field
calibrated. Additionally, monitoring equipment should be regularly calibrated in
accordance with manufacturer’s specifications and operated only as instructed.
2.3.4 Procedures
Prior to each monitoring event, the portable gas analyzer will be calibrated with a
known calibration standard in accordance with manufacturer’s
recommendations. General information related to the monitoring event,
equipment used, calibration procedures, weather conditions, and results for
each monitoring event will be recorded on the landfill gas monitoring data form
(Appendix A).

The following steps outline the procedure for the monitoring of LFG wells and
facility structures:

• Check calibration date on the meter and calibrate according to
manufacturer’s instructions; allowing equipment to warm up properly
prior to use, per manufacturers direction.
• Purge sample tube for one minute before monitoring.

LFG Monitoring Points:
o Connect instrument to tubing from the barhole equipment.
o Open the valve and record both the initial and stabilized methane
concentrations. A stabilized concentration will not vary more than
0.5 percent by volume on the instrument’s scale. Also record the
oxygen concentration (at two percent per volume or less to
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indicate air is not being drawn into the system and providing false
readings) and the carbon dioxide concentration.
o Close the valve and disconnect the tubing.
o Record monitoring data on the LFG monitoring data form provided
in Appendix A.
o If any methane concentration is greater than 50% of the LEL (2.5%
CH4), monitoring personnel should implement the Precautionary
Action Plan (Section 2.3.5).
o If both initial and stabilized methane concentrations are less than
50% of the LEL (2.5% CH4), move to next LFG monitoring location.
o If any hydrogen sulfide concentration is greater than 4%,
monitoring personnel should, immediately recalibrate and re-
measure the location. If the concentration is still above 4%, notify
the Landfill Manager and the Engineer.

Structures:
o Walk through the facility structure with a methane analyzer and
monitor the perimeter wall interface of the structure, the floor to
wall interface in hallways and rooms, and any floor penetrations in
the structure. Record the initial and stabilized methane
concentrations, oxygen concentration, and carbon dioxide
concentration.
o Record monitoring data on the LFG monitoring data form provided
in Appendix A.
o Notify the Landfill Manager, Operations Manager and the Engineer
for any methane concentration greater than 0% of the LEL.

IF A STABILIZED METHANE CONCENTRATION IS GREATER THAN 100% OF THE
LEL IN A LFG MONITORING WELL OR GREATER THAN 25% OF THE LEL IN A
FACILITY STRUCTURE, THE FOLLOWING ACTIONS WILL BE IMPLEMENTED:

1) Recalibrate monitoring equipment and confirm results.
2) If results are confirmed, IMMEDIATELY contact the Landfill Manager and
the Engineer.
3) Implement the Compliance Action Plan located in Section 3.1.

A flowchart of potential actions if exceedances are noted is included as Figure 2.
2.3.5 Precautionary Action Plan
If an initial or stabilized methane concentration is greater than or equal to 50% of
the LEL in a LFG monitoring well, monitoring personnel should perform the
following additional steps at this location:

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• Record at least one additional methane concentration measurement,
from the barhole location and a second location nearby.
• Evaluate the surrounding area for potential receptors to or signs of LFG
migration. LFG can stress vegetation and can kill trees and grass by root
asphyxiation. Note stressed/dead vegetation areas on the monitoring
form.
• Notify the Landfill Manager and the Engineer for further evaluation.
2.3.6 Record Keeping
Routine LFG monitoring events will be documented on the LFG monitoring data
form provided in Appendix A. Completed forms will be placed in the landfill
operating record located at 5830 Riverdale Road, Jamestown, North Carolina
27282. These forms will be available for review by DWM personnel on request.

Documentation of any contingency plan actions (Section 3.0) will also be kept in
the operating record.
2.4 Maintenance
Periodic maintenance and site observations will be conducted routinely to address
monitoring program components (at a minimum):

• Maintain access to LFG monitoring locations.
• Observe landfill cover conditions, areas of dead vegetation, leachate seeps,
odors, etc. as indications of potential LFG-related problems.

Note deficiencies on the monitoring forms and report to the Solid Waste Operations
Manager for repair or replacement as necessary.
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Revised October 2016 Page 8
3.0 CONTINGENCY PLAN
If a stabilized methane concentration is greater than 100% of the LEL in a LFG monitoring
location or greater than 25% of the LEL in a facility structure, the technician will perform the
actions presented in the immediate action, and plan and prepare a remediation plan as
described below.
3.1 Immediate Action Plan
The Solid Waste Operations Manager will perform the following actions for the
protection of human health and safety:

1) Evacuate affected facility structures and the immediately surrounding area.
2) Determine nearby potential receptors (facility and off-site structures).
3) Perform monitoring in any other facility structure near the monitoring location
having the high concentration.
4) If exceedances are noted in a facility structure, Contact the County Fire
Department (911).
5) Verbally notify the Landfill Manager.
6) Verbally notify the NCDEQ DWM (Section 1.1) as soon as practical.
7) Investigate and identify the potential source(s) and conduit(s) for LFG migration
that may have caused the high concentration (i.e. the migration path that the LFG
may be following to the monitoring location).
8) Identify the LFG extent using barhole punch sampling methodology or other
applicable alternative method as practical.
9) As appropriate, begin corrective action to control methane concentrations in
structures surrounding the landfill site.
3.1.1 Reporting and Documentation
Within seven days of the detection of a high methane concentration, the Facility
will prepare and submit an Environmental Monitoring Reporting Form (Appendix
A) with the results of the monitoring event to the DWM. The Facility will also
place a description of the actions performed to protect human health in the
operating record.
3.2 Remediation Plan
Within sixty days of the detection of a high methane concentration, a remediation plan
describing the problem nature, extent, and proposed remedy will be submitted to
NCDEQ for approval. Following approval the plan will be implemented and a copy will be
placed in the operating record. The DWM will also be notified the plan has been
implemented.

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Revised October 2016 Page 9
An extension may be granted by the DWM on written request and depending on severity
of the situation.

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Figures

Landfill Gas Monitoring Plan
WI High Point, LLC.
WI High Point C&D Landfill
High Point, North Carolina
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NC LIC. NO. C-0828 (ENGINEERING)
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DRAWN:APPROVED:SCALE:DATE:PROJECT NO.:FIGURE NO.:FILE NAME:
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© 2016 Smith Gardner, Inc.
FLOWCHART OF
METHANE MONITORING REQUIREMENTS
WI HIGH POINT LANDFILL, LLC
HIGH POINT C&D LANDFILL
T.R.S.M.M.G.N.T.S.WIHIGHPOINT 16-1 2 WI-A1113Jan 2016
2.WITHIN 7 DAYS1.IMMEDIATELY 3.WITHIN 60 DAYS
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Appendix A
Reporting Forms
Landfill Gas Monitoring Plan
WI High Point, LLC.
WI High Point C&D Landfill
High Point, North Carolina
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Form based on NC Department of Environment and Natural Resources, Division of Waste Management, Solid Waste Section, Landfill Gas Monitoring
Guidance, November 2010, pg. 16.
Landfill Gas Monitoring Data Form

Notice: This form and any information attached to it are "Public Records" as defined in NC General Statute 132-1. As such, these
documents are available for inspection and examination by any person upon request (NC General Statute 132-6).

Facility Name: ______________________________________________ Permit Number: ______________
Date of Sampling: ___________________ NC Landfill Rule (.0500 or .1600): _____________________
Name and Position of Sample Collector: _________________________________________
Type and Serial Number of Gas Meter: _______________________________ Calibration Date of Gas Meter: _____________
Date and Time of Field Calibration: ___________________Type of Field Calibration Gas (15/15 or 35/50): ____________
Expiration Date of Field Calibration Gas Canister: ________Pump Rate of Gas Meter: _____________
Ambient Air Temperature: __________ Barometric Pressure: ______________General Weather Conditions: _____________
Instructions: Under “Location or LFG Well” identify the monitoring wells or describe the location for other tests (e.g., inside buildings).
A drawing showing the location of test must be attached. Report methane readings in both % LEL and % methane by volume. A reading
in percent methane by volume can be converted to % LEL as follows: % methane by volume = % LEL/20.

Location
or LFG
Well ID
Sample
Tube
Purge
Time
Time
Pumped
(s)
Initial
% LEL
Stabilized
% LEL
%CH4 by
Volume %O2 %CO2 H2S
(ppm) Notes

If your facility has more gas monitoring locations than there is room on this form, please attach additional sheets listing the same
information as contained on this form.

Certification
To the best of my knowledge, the information reported and statements made on this data submittal and attachments are true
and correct. I am aware that there are significant penalties for making any false statement, representation, or certification
including the possibility of a fine and imprisonment.

_________________________________________ _________________________________________
SIGNATURE TITLE
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