WS-29804_48908_CA__SCH_20230405

1
Gene Mao
From:Barry Nelson <[e-mail]>
Sent:Friday, April 14, 2023 8:18 AM
To:Gene Mao
Subject:Dilutions for Last Minute Market
*WARNING* This email originated outside Guilford County's email system.
*WARNING*
Do not click unrecognized links or attachments. When in doubt, use the Phish Alert
Report button.
The lab indicates that the various dilution factors for UVF testing is due to the various weights of the 
samples.  Therefore, there is a range of dilution factors. However, the dilution factors do not have any effect on the test 
results.  If you need additional information, please call Tori Kelly at 904 540 8559.  Please remember that the UVF on site 
lab testing for total petroleum hydrocarbons is an approved method by the UST Section.  Hope this helps.  The owner is 
trying to sell the store and we need to get a letter of no further action as soon as possible.  Thanks and have a great day.

‐‐  
A. Barry Nelson, PG 
President 

NORTHWEST GEOSCIENCE, P.C. 
APPLIED EARTH SCIENTISTS 
www.northwestgeoscience.com 
P.O. Box 6418 
High Point, NC  27262 
336‐885‐4381 ‐ office 
336‐880‐5834 ‐ mobile 

April 5, 2023

North Carolina Department of Environmental Quality
UST Section
Winston-Salem Regional Office
450 West Hanes Mill Road
Suite 300
Winston-Salem, NC 27105

Attention: Mr. James Brown
Regional Supervisor

Via Electronic Mail: [e-mail]

Subject: Last Minute Market
Facility ID Number: 00-0-0000031800
Incident #48908
Last Results of Site Check

Dear James:

Northwest Geoscience, PC (NWGS) has been retained by Amanda Nelson,
owner of the Last Minute Market located at 8458 Haw River Road in Oak Ridge,
NC with regard to the Notice of Regulatory Requirements dated March 15,
2023.
A copy of the NORR is attached for your reference. This letter report presents
the results of the soil sampling and testing at the facility as part of the
requested site check. Results of the tank and line tightness testing were
previously submitted to you in a letter from NWGS dated March 27, 2023. As
you will recall, the results of the tank and line tightness tests did not identify
any leaks.

SUBSURFACE SAMPLING

The Last Minute Market is located at 8558 Haw River Road in Oak Ridge,
Guilford County, North Carolina. The facility is a small service station and
convenience store located on the north side of the highway. Figure 1 is a site
location map. The service station contains two (2), 2,000-gallon underground
storage tanks (USTs) one each for regular gasoline and diesel. Lines and two
dispensers are also located on the site. Figure 2 is a site map showing the
elements of the underground storage tank system.

Prior to laying out borings for the site check, Northstate Utility Locating, Inc.
used a mobile ground penetrating radar unit to locate and mark underground
utilities, extents of the two USTs, and the locations of the product lines. Three
borings were located around the UST pit, four along the product lines and four
around the dispensers. Figure 3 shows the locations of the borings. All borings
were advanced using a Direct Push Geoprobe. The borings around the UST pit
extended to 10 feet below ground surface. Soil samples were collected from
the sampling sleeves from 9-10 feet and composited in a clean mixing bowl.
This sampling interval was selected based on the belief that the top of the
USTs were 2-3 feet below ground surface, and the diameter of the USTs were
six (6) feet. The remainder of the Geoprobe borings extended to a depth of 5
feet below ground surface. Soil samples were extracted from the sampling
sleeves from the 3-4 foot interval, placed in a clean mixing bowl and
composited.

ANALYTICAL TESTING

Each soil sample was placed in a clean VOA bottle and delivered to a
representative of Red Labs for onsite testing. The soil was tested using a QED
UVF analyzer for Total Petroleum Hydrocarbons Gasoline Range Organics
(GRO) and Diesel Range Organics (DRO). The analytical method detection limit
is 1.0 mg/kg.

RESULTS OF TESTING

Only one soil sample (T1) contained a Total Petroleum Hydrocarbon (TPH) GRO
concentration above the method detection limit. The concentration was 16
mg/kg or (ppm), well below the maximum concentration limit (mcl) for this
compound (50 ppm). The remainder of the samples (T-2 and T-3, L-1 through
L-4, and D-1 through D-4) did not contain Total Petroleum Hydrocarbons (TPH)
above 1.1 mg/kg or (ppm). The Red Labs data tables and fingerprints are
attached (Table 1).

REQUEST FOR A LETTER OF NO FURTHER ACTION

Based on the results of the tank, line and sump testing, the soil sampling and
testing around the USTs, the lines and dispensers, the fact that the UST system
is a suction type, the lack of detection of petroleum hydrocarbons in the water
sample from the domestic well and the multiple uses of EDB, NWGS requests
that NCDEQ issue a Letter of No Further Action for this incident. Further, NWGS
will be submitting a request for reimbursement for the site check. It is our
understanding that because there are no indications of exceedances of any
regulatory contaminant level and the system passed the leak detection testing,
it is the policy of the NCDEQ to reimburse the owner for these costs.

Should you have any questions or require additional information, please do not
hesitate to contact NWGS. We look forward to a reply.

Sincerely,
Northwest Geoscience, PC

Alan Barry Nelson, PG
President
cc: Ms. Amanda Nelson
Mr. Gene Mao
Hy
d
r
o
c
a
r
b
o
n

A
n
a
l
y
s
i
s

R
e
s
u
l
t
s
Cl
i
e
n
t
:
NW

G
E
O
S
C
I
E
N
C
E
Sa
m
p
l
e
s

t
a
k
e
n
Tu
e
s
d
a
y
,

A
p
r
i
l

4
,

2
0
2
3
Ad
d
r
e
s
s
:
84
5
8

H
A
L
L

R
I
V
E
R

R
O
A
D
,

O
A
K

R
I
D
G
E

N
C
Sa
m
p
l
e
s

e
x
t
r
a
c
t
e
d
Tu
e
s
d
a
y
,

A
p
r
i
l

4
,

2
0
2
3
Sa
m
p
l
e
s

a
n
a
l
y
s
e
d
Tu
e
s
d
a
y
,

A
p
r
i
l

4
,

2
0
2
3
Co
n
t
a
c
t
:
BA
R
R
Y

N
E
L
S
O
N
Op
e
r
a
t
o
r
TO
R
I

K
E
L
L
Y

Pr
o
j
e
c
t
:
TH
E

L
A
S
T

M
I
N
U
T
E

M
A
R
T
10
T0
3
3
0
8
Ma
t
r
i
x

S
a
m
p
l
e

I
D
Di
l
u
t
i
o
n

us
e
d
BT
E
X

(C
6

-

C
9
)
GR
O

(C
5

-

C
1
0
)
DR
O

(C
1
0

-

C
3
5
)
TP
H

(C
5

-

C
3
5
)
To
t
a
l

Ar
o
m
a
t
i
c
s

C1
0
-
C
3
5
16

E
P
A

PA
H
s
Ba
P

H
C

F
i
n
g
e
r
p
r
i
n
t

M
a
t
c
h
% l
i
g
h
t

%

m
i
d
%
he
a
v
y
s
T
1

9
-
1
0
'

2
0
.
0

<
0
.
5

1
6
.
4

0
.
6
2

1
7
.
0
2

0
.
2
9

<
0
.
1
6

<
0
.
0
2

9
8
.
6

0
.
7

0
.
7
De
g
.
P
H
C

5
8
.
6
%
,
(
F
C
M
)
,
(
B
O
)
s
T
3

9
-
1
0
'

2
3
.
4

<
0
.
5
9

<
0
.
5
9

<
0
.
5
9

<
0
.
5
9

<
0
.
1
2

<
0
.
1
9

<
0
.
0
2
3

0

0

0
PH
C

n
o
t

d
e
t
e
c
t
e
d
,
(
B
O
)
,
(
P
)
s
T
2

9
-
1
0
'

2
4
.
5

<
0
.
6
1

<
0
.
6
1

<
0
.
6
1

<
0
.
6
1

<
0
.
1
2

<
0
.
2

<
0
.
0
2
5

0

0

0
PH
C

n
o
t

d
e
t
e
c
t
e
d
,
(
B
O
)
s
L
3

4
-
5
'

1
7
.
7

<
0
.
4
4

<
0
.
4
4

<
0
.
4
4

<
0
.
4
4

<
0
.
0
9

<
0
.
1
4

<
0
.
0
1
8

0

1
0
0

0
Re
s
i
d
u
a
l

H
C
,
(
P
)
s
L
1

4
-
5
'

2
5
.
0

<
0
.
6
3

<
0
.
6
3

<
0
.
6
3

<
0
.
6
3

<
0
.
1
3

<
0
.
2

<
0
.
0
2
5

0

0

0
PH
C

n
o
t

d
e
t
e
c
t
e
d
,
(
B
O
)
,
(
P
)
s
L
2

4
-
5
'

2
0
.
0

<
0
.
5

<
0
.
5

<
0
.
5

<
0
.
5

<
0
.
1

<
0
.
1
6

<
0
.
0
2

0

7
3
.
1

2
6
.
9
Re
s
i
d
u
a
l

H
C
,
(
P
)
s
D
1

3
-
4
'

2
1
.
8

<
0
.
5
5

<
0
.
5
5

0
.
5
5

0
.
5
5

0
.
3
1

<
0
.
1
7

<
0
.
0
2
2

0

7
6
.
2

2
3
.
8
Re
s
i
d
u
a
l

H
C
,
(
P
)
s
D
2

3
-
4
'

2
1
.
3

<
0
.
5
3

<
0
.
5
3

1
.
1

1
.
1

0
.
4
9

<
0
.
1
7

<
0
.
0
2
1

9
5
.
7

3
.
1

1
.
2
De
g

F
u
e
l

5
9
.
8
%
,
(
F
C
M
)
,
(
B
O
)
,
(
P
)
s
L
4

3
-
4
'

2
5
.
7

<
0
.
6
4

<
0
.
6
4

0
.
6
4

0
.
6
4

0
.
5
3

<
0
.
2
1

<
0
.
0
2
6

0

6
6
.
8

3
3
.
2
Re
s
i
d
u
a
l

H
C
,
(
B
O
)
,
(
P
)
In
i
t
i
a
l

C
a
l
i
b
r
a
t
o
r

Q
C

c
h
e
c
k
OK
Fi
n
a
l

F
C
M

Q
C

C
h
e
c
k
OK

9
8
.
1

%
0.
9
9
8
Re
s
u
l
t
s

g
e
n
e
r
a
t
e
d

b
y

a

Q
E
D

H
C
-
1

a
n
a
l
y
s
e
r
.

C
o
n
c
e
n
t
r
a
t
i
o
n

v
a
l
u
e
s

i
n

m
g
/
k
g

f
o
r

s
o
i
l

s
a
m
p
l
e
s

an
d

m
g
/
L

f
o
r

w
a
t
e
r

s
a
m
p
l
e
s
.

S
o
i
l

v
a
l
u
e
s

a
r
e

n
o
t

c
o
r
r
e
c
t
e
d

f
o
r

m
o
i
s
t
u
r
e

o
r

s
t
on
e

c
o
n
t
e
n
t
Fin
g
e
r
p
r
i
n
t
s

p
r
o
v
i
d
e

a

t
e
n
t
a
t
i
v
e

h
y
d
r
o
c
a
r
b
o
n

i
d
e
n
t
i
f
i
c
a
t
i
o
n
.

T
h
e a
b
b
r
e
v
i
a
t
i
o
n
s

a
r
e
:
-

F
C
M

=

R
e
s
u
l
t
s

c
a
l
c
u
l
a
t
e
d

u
s
i
n
g

F
u
n
d
a
m
e
n
t
al

C
a
l
i
b
r
a
t
i
o
n

M
o
d
e

:

%

=

c
o
n
f
i
de
n
c
e

f
o
r

s
a
m
p
l
e

f
i
n
g
e
r
p
r
i
n
t

m
a
t
c
h

t
o

l
i
b
r
a
r
y
(S
B
S
)

o
r

(
L
B
S
)

=

S
i
t
e

S
p
e
c
i
f
i
c

o
r

L
i
b
r
a
r
y

B
a
c
k
g
r
o
u
n
d

S
u
b
t
r
a
c
t
i
o
n a
p
p
l
i
e
d

t
o

r
e
s
u
l
t

:

(
P
F
M
)

=

P
o
o
r

F
i
ng
e
r
p
r
i
n
t

M
a
t
c
h
:

(
T
)

=

T
u
r
b
i
d

:

(
P
)

=

P
a
r
t
i
c
u
l
a
t
e

p
r
e
s
e
n
t
Ra
t
i
o
s
Hy
d
r
o
c
a
r
b
o
n

A
n
a
l
y
s
i
s

R
e
s
u
l
t
s
Cl
i
e
n
t
:
NW

G
E
O
S
C
I
E
N
C
E
Sa
m
p
l
e
s

t
a
k
e
n
Tu
e
s
d
a
y
,

A
p
r
i
l

4
,

2
0
2
3
Ad
d
r
e
s
s
84
5
8

H
A
L
L

R
I
V
E
R

R
O
A
D
,

O
A
K

R
I
D
G
E

N
C
Sa
m
p
l
e
s

e
x
t
r
a
c
t
e
d
Tu
e
s
d
a
y
,

A
p
r
i
l

4
,

2
0
2
3
Sa
m
p
l
e
s

a
n
a
l
y
s
e
d
Tu
e
s
d
a
y
,

A
p
r
i
l

4
,

2
0
2
3
Co
n
t
a
c
t
:
BA
R
R
Y

N
E
L
S
O
N
Op
e
r
a
t
o
r
TO
R
I

K
E
L
L
Y

Pr
o
j
e
c
t
:
TH
E

L
A
S
T

M
I
N
U
T
E

M
A
R
T
15
T0
3
3
0
8
Ma
t
r
i
x

S
a
m
p
l
e

I
D
Di
l
u
t
i
o
n

us
e
d
BT
E
X

(C
6

-

C
9
)
GR
O

(C
5

-

C
1
0
)
DR
O

(C
1
0

-

C
3
5
)
TP
H

(C
5

-

C
3
5
)
To
t
a
l

Ar
o
m
a
t
i
c
s

C1
0
-
C
3
5
16

E
P
A

PA
H
s
Ba
P

H
C

F
i
n
g
e
r
p
r
i
n
t

M
a
t
c
h
%
l
i
g
h
t

%

m
i
d
%
he
a
v
y
s
D
3

3
-
4
'

1
8
.
4

<
0
.
4
6

<
0
.
4
6

0
.
8
9

0
.
8
9

0
.
4
3

<
0
.
1
5

<
0
.
0
1
8

9
3
.
9

4
.
6

1
.
4
Ro
a
d

T
a
r

8
8
.
9
%
,
(
F
C
M
)
,
(
B
O
)
,
(
P
)
s
D
4

3
-
4
'

2
0
.
3

<
0
.
5
1

<
0
.
5
1

0
.
5
1

0
.
5
1

0
.
4
6

<
0
.
1
6

<
0
.
0
2

9
6
.
7

2
.
4

1
Ro
a
d

T
a
r

6
4
.
4
%
,
(
F
C
M
)
,
(
B
O
)
,
(
P
)
s
L
1

3
-
4
'

2
4
.
3

<
0
.
6
1

<
0
.
6
1

0
.
6
1

0
.
6
1

0
.
3

<
0
.
1
9

<
0
.
0
2
4

0

0

1
0
0
Re
s
i
d
u
a
l

H
C
,
(
B
O
)
,
(
P
)
s
L
2

3
-
4
'

2
0
.
3

<
0
.
5
1

<
0
.
5
1

<
0
.
5
1

<
0
.
5
1

<
0
.
1

<
0
.
1
6

<
0
.
0
2

0

0

0
PH
C

n
o
t

d
e
t
e
c
t
e
d
,
(
P
)
s
L
3

3
-
4
'

2
2
.
2

<
0
.
5
6

<
0
.
5
6

0
.
5
6

0
.
5
6

0
.
4
2

<
0
.
1
8

<
0
.
0
2
2

0

7
8
.
4

2
1
.
6
Ro
a
d

T
a
r

9
3
.
9
%
,
(
F
C
M
)
,
(
B
O
)
In
i
t
i
a
l

C
a
l
i
b
r
a
t
o
r

Q
C

c
h
e
c
k
OK
Fi
n
a
l

F
C
M

Q
C

C
h
e
c
k
OK

1
0
1
.
8

%
Re
s
u
l
t
s

g
e
n
e
r
a
t
e
d

b
y

a

Q
E
D

H
C
-
1

a
n
a
l
y
s
e
r
.

C
o
n
c
e
n
t
r
a
t
i
o
n

v
a
l
u
e
s

i
n

m
g
/
k
g

f
o
r

s
o
i
l

s
a
m
p
l
e
s

an
d

m
g
/
L

f
o
r

w
a
t
e
r

s
a
m
p
l
e
s
.

S
o
i
l

v
a
l
u
e
s

a
r
e

n
o
t

c
o
r
r
e
c
t
e
d

f
o
r

m
o
i
s
t
u
r
e

o
r

s
t
on
e

c
o
n
t
e
n
t
Fi
n
g
e
r
p
r
i
n
t
s

p
r
o
v
i
d
e

a

t
e
n
t
a
t
i
v
e

h
y
d
r
o
c
a
r
b
o
n

i
d
e
n
t
i
f
i
c
a
t
i
o
n
.

T
h
e
a
b
b
r
e
v
i
a
t
i
o
n
s

a
r
e
:
-

F
C
M

=

R
e
s
u
l
t
s

c
a
l
c
u
l
a
t
e
d

u
s
i
n
g

F
u
n
d
a
m
e
n
t
al
C
a
l
i
b
r
a
t
i
o
n

M
o
d
e

:

%

=

c
o
n
f
i
de
n
c
e

f
o
r

s
a
m
p
l
e

f
i
n
g
e
r
p
r
i
n
t

m
a
t
c
h

t
o

l
i
b
r
a
r
y
(S
B
S
)

o
r

(
L
B
S
)

=

S
i
t
e

S
p
e
c
i
f
i
c

o
r

L
i
b
r
a
r
y

B
a
c
k
g
r
o
u
n
d

S
u
b
t
r
a
c
t
i
o
n
a
p
p
l
i
e
d

t
o

r
e
s
u
l
t
:

(
P
F
M
)

=

P
o
o
r

F
i
ng
e
r
p
r
i
n
t

M
a
t
c
h
:

(
T
)

=

T
u
r
b
i
d

:

(
P
)

=

P
a
r
t
i
c
u
l
a
t
e

p
r
e
s
e
n
t
Ra
t
i
o
s
QED Hydrocarbon Fingerprints
Project: THE LAST MINUTE MART Tuesday, April 4, 2023