20160419 Ver 1_Sampling Results_20171103

Strickland, Bev
From: jim arm <[e-mail]>
Sent: Friday, November 3, 2017 12:21 PM
To: Patterson, Jenny
Cc: Gregson, Jim; Mairs, Robb L
Subject: [External] Carolina Lake 3 of 3
Attachments: Report Scan Final.pdf, Figure 1 Soil Sample Location Map.pdf; Figure 2 CL Disposal
Area Sample Location Map.pdf
CAUTION: External email. Do not click links or open attachments unless verified. Send all suspicious email as an attachment to
[e-mail].
Last and final.
Have a good weekend.
Jim Corvette

October 27, 2017 CONFIDENTIAL AR
Town of Carolina Beach
Attn.: Mr. Michael Cramer
Town Manager
1121 North Lake Park Blvd.
Carolina Beach, North Carolina 28428
Re.: Carolina Lake and
WWTP Property
Sampling Results
Mr. Cramer,
Geothermal, Ervironmenta
& Well Drilling
This report serves to present the findings of the recent series of soil and groundwater samples
collected as part of your Carolina Lake cleaning efforts. The following back-up documents are
provided for your reference:
Table 1 Soil Sample Results Summary
Table 2 Surface And Groundwater Sample Results Summary
Figure 1 Carolina Lake With Sample Locations
Figure 2 Soil Disposal Area Sample Locations
Laboratory Reports
Two areas are focused on as part of this investigation, Carolina Lake (Lake), and the Land
Application Area at the town's Wastewater Treatment Plant (WWTP). Each is addressed below:
1.0 Carolina Lake
Background Soil Sampling
Two background samples were collected in orderto help understand Arsenic levels outside
of the lake's footprint. Each of these samples was a composite sample, collected
throughout a boring of approximately six to seven feet deep. BG-3 was collected north of
the lake near the park's northeastern corner. BG-4 was collected south of the lift station
near the lake's southeastern corner. Refer to Figure 1 for sample locations. Both samples
were packaged in laboratory glassware, then transported to a NC Certified Laboratory for
analysis for Arsenic. Neither samples were found to be impacted by Arsenic (Refer to
Table 1 and the attached laboratory reports).
Lake Bottom Sediment Sampling
As part of lake cleaning operations, it was divided into four zones - 1, 2, 3, and 4. Zones
3 and 4 have already been excavated, with their material transported to the WWTP. As
such, no additional sampling of the Zones 3 and 4 areas was conducted. Three locations
were chosen from each of the remaining two zones. A single composite sample was
collected from each of the six total locations. The samples were collected from the lake's
Applied Keoouroe Management, i' G.
P. 0. Box 882, 257 Transfer 5tation (load, Hampstead, NC 28443 910.270.2919 Fax [phone]

October 27, 2017
bottom surface, through a sediment thickness of six feet. The samples were packaged in
laboratory glassware, then transported to a NC Certified Laboratory for analysis forArsenic.
Three of the lake samples, L-1, L-2, and L-5 were found to contain Arsenic above State
Action Levels. L-5 was above the Unrestricted Standards, L-1 and L-2 were above the
Industrial Commercial/Standard. All of the other lake sediment samples were found to be
compliant (Refer to Table 1 and the attached laboratory reports). It should be noted that
L-4 did have a slightly elevated reporting limit due to sample matrix interference. While this
reporting limit is just above the unrestricted standard, it is not believed that this sample was
impacted.
Lake Water Sampling
Two water samples were collected from the lake. Sample L-4 was collected from the area
of the L-4 lake bottom sample. The Intake sample was collected from adjacent to the
dewatering pumps in -take. A single grab sample was collected from each of the locations.
The lake water samples were packaged in laboratory acid preserved sample ware, then
transported to a NC Certified Laboratory for analysis for Arsenic. As presented, neither of
these samples revealed an impact by Arsenic. Refer to Figure 1 for sample locations,
Table 2, and the attached laboratory reports.
2.0 WWTP Land Application Area
Soil - Two background soil samples, BG-1 and BG-2, and one background groundwater
sample, MW-11, were collected in order to help understand Arsenic levels outside of the
WWTP's land application footprint. Both soil samples were composite samples collected
from the upper three feet of borings drilled as shown on Figure 2. Both soil samples were
packaged in laboratory glassware.
Groundwater- The background groundwater sample was collected from previously existing
monitoring well MW-11, located near the northeastern corner of the WWTP property.
Monitoring Well MW-11 was purged until turbidity stabilized, then allowed to stabilize before
sampling. Sampling occurred less than 24 hours from purging completion. The
groundwater sample was collected in a laboratory acid preserved sample water.
All were then transported to a NC Certified Laboratory for analysis for Arsenic. Neither the
background soil samples, nor the groundwater sample were found to be impacted by
Arsenic (Refer to Tables 1, 2, and the attached laboratory reports).
Land Application Area Soil Sampling
A series of five composite soil samples, S-1 through S-5, were collected from the areas
shown on Figure 2. The samples were packaged in laboratory glassware, then transported
to a NC Certified Laboratory for analysis for Arsenic. None of the soil samples revealed
Arsenic above State Action Limits. It should be noted that S-4 did have a slightly elevated
reporting limit due to sample matrix interference. While this reporting limit is just above the
unrestricted standard, it is not believed that this sample was impacted. Refer to Table 1,
2

October 27, 2017
Figure 1, and the attached laboratory reports.
Groundwater Sampling
A series of four Type II monitoring wells was constructed throughout the land application
area. MW-1 and MW-2 were constructed at the western end at the toe -of -the -slope of the
land application area. MW-3 was constructed through the center of the area, and MW-4
through the eastern application area. Each well was purged until clear, then allowed to
stabilize. A water sample was collected from each within 24 hours of completion of well
purging. The groundwater samples were packaged in laboratory acid preserved sample
ware, then transported to a NC Certified Laboratory for analysis for Arsenic. As presented,
none of these samples revealed an impact by Arsenic. Refer to Table 2, Figure 2, and the
attached laboratory reports.
3.0 Summary of Findings
The following summarizes the findings of this investigation:
1. Background sampling revealed no evidence of naturally occurring soil or groundwater
Arsenic levels above State Action Levels.
2. Groundwater sampling revealed no evidence of Arsenic impacts to the groundwater under
the WWTP property.
3. Composite soil sampling revealed no evidence of Arsenic impacts to the material which was
land applied to the WWTP property.
4. Lake water sampling revealed no evidence of Arsenic held in suspension.
5. Three areas of Arsenic impacts above State Action Levels were confirmed within the lake
bottom sediment present under southern and central portion of Zone 2, and central portion
of Zone 1.
Recommendations are as follows:
1. Do not allow any further excavation of the known or suspected Arsenic impacted areas in
Zones 1 and 2 in Carolina Lake.
2. Conduct additional sampling to further isolate and define the Arsenic impacts in Zones 1
and 2.
Please note that as of the date of this report, any Arsenic impacted soils removed from the lake
would likely be characterized as a regulated waste, requiring specificwaste profiling, handling, and
manifesting, as well as coordination with the NCDEQ. If you have any questions, please do not
hesitate to call.
James L. Cornette, PG, CWD
Project Manager
encs.
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TABLE 1
SOIL SAMPLE RESULTS SUMMARY
ARM PROJECT: 17262
OCTOBER 27, 2016
METHOD 6010 (CONCENTRATIONS IN mg/Kg)
ANALYTE
ARSENIC
INACTIVE HAZARDOUS SITE
BRANCH PRELIMINARY SOIL
REMEDIATION GOALS
(PSRG)(Updated First & Third Quarter
of Calendar Year)
USE HEALTH BASED
PSRG' (mg/kg) DOES NOT
NEED LAND USE
RESTRICTIONS
INDUSTRIAL/ COMMERCIAL
HEALTH BASED PSRG'
(mg/kg) NEEDS LAND USE
RESTRICTIONS
LIMITS
0.680 (6.80 E-01)
3.0 (3.00E+00)
SAMPLE ID
DATE SAMPLED
RESULTS
S-1
10/23/17
<0.271
S-2
10/23/17
<0.298
S-3
10/23/17
<0.266
S-4
10/23/17
<0.806*
S-5
10/23/17
<0.211
L-1
10/24/17
8.00
L-2
10/24/17
6.33
L-3
10/24/17
<0.450
L-4
10/24/17
<0.922
L-5
10/24/17
2.65
L-6
10/24/17
<0.501
BG-1
10/23/17
<0.216
BG-2
10/23/17
<0.203
BG-3
10/23/17
<0.236
BG-4
10/23/17
<0.234
Shaded red represents compounds above the Industrial Health -Based Soil Remediation Goals (PSRG), as shown.
Shaded gray represents compounds above the Use Health Based PSRG as shown.
* Reporting Limits raised due to matrix interference.
NOTES:
Preliminary health -based soil remediation goals (PSRGs) (adapted from the May 2016 USEPA Regional Screening Tables
(RSL.) https://www.epa.gov/risk/regional-screening-levels-rsls-generic-tables-may-2016 .
The lower of the carcinogenic remediation goal at 1.0E-06 risk, the non -carcinogenic remediation goal at a hazard quotient of
0.2, the chemical specific soil saturation concentration (Csat), and the Ceiling Concentration — Max (100,000 mg/kg) is listed.
Industrial Remediation Goals can only be used with Branch approval and land use restrictions. Industrial PSRGs cannot be
used for properties occupied or frequented by children.
Determine if a chemical has both carcinogenic and non -carcinogenic properties from the USEPA RSL Supporting Tables
before adjusting, as prescribed in the guidance.
z - Developed using a soil leachate model using default values appropriate for North Carolina (see pg. 24). For chemicals with no
protection of groundwater remediation goal call the Branch or refer to the guidance. Protection of groundwater remediation
goals can be developed using other methods described in Branch Guidance.

TABLE 2
SURFACE WATER AND GROUNDWATER SAMPLE RESULTS SUMMARY
ARM PROJECT: 17262
OCTOBER 27, 2016
EPA METHOD 200.7 (CONCENTRATIONS IN mg/L)
ANALYTE
ARSENIC11
STANDARD
NORTH CAROLINA 15A NCAC 02B WATER QUALITY STANDARDS FOR SURFACE
WATERS (All values reported as ug/L unless labeled otherwise)
Freshwater
Fresh & Salt
Saltwater
Primary
Water Supply6
Recreation`
Aquatic Life' &
Recreation
Primary
Shellfishs
Recreation8
Aquatic Life' &
Fish Consumption
Secondary
Recreation8
LIMITS
Secondary
Class B
Class WS
All waters
All waters
All waters
Class SB
Class SA
(I - V)
(Class C)
(Class C & SC)
I (Class SC)
---
10 t
()
Acute: 340 (d)
10 t)
(
Acute: 69 (d)
--
- -
Chronic: 150 (d)
Chronic: 36 (d)
SAMPLE
DATE
RESULTS
ID
SAMPLED
L-1
10/24/17
<0.01 mg/L (<10 ug/L)
Intake
10/24/17
<0.01 mg/L (<10 ug/L)
ANALYTE
ARSENIC
STANDARD
15A NCAC 02L .0202 GROUNDWATER STANDARDS
LIMITS
0.010 mg/L (<10 ug/L)
SAMPLE
DATE
RESULTS
ID
SAMPLED
MW-1
10/25/17
<0.010 mg/L (<10 ug/L)
MW-2
10/25/17
<0.010 mg/L (<10 ug/L)
MW-3
10/25/17
<0.010 mg/L (<10 ug/L)
MW-4
10/25/17
<0.010 mg/L (<10 ug/L)
MW-11
10/25/17
<0.010 m /L <10 u /L
Shaded gray represents compounds
ND = None Detected
(d) = dissolved metal standard. See 15A NCAC 02B .0211 for more information.
(t) = based upon measurement of total recoverable metal. See 15A NCAC 02B .0211 for more information.
0) Aquatic Life standards protect both fresh and saltwater aquatic organisms to promote biological integrity. See 15A NCAC 02B .0211 and .0220.
(3) Fish Consumption standards are based on consumption of fish (including shellfish) tissue. These standards are commonly referred to as "Human
Health" standards. See 15A NCAC 02B .0208.
(4) Secondary Recreation standards apply to activities in surface waters that result in incidental body contact. See 15A NCAC 02B .0211 and .0220.
(6) Water Supply standards are applicable to all Water Supply Classifications (W S I-V) and are based on consumption of fish and water. See 15A
NCAC 026 .0208, .0212, .0214, .0215, .0216, and .0218.
cep Primary Recreation standards apply to activities in surface waters that result in full -body contact. See 15A NCAC 02B .0219 and .0222.
ce> Shellfish Area standards apply to surface waters that are used for shelifishing for market purposes. See 15A NCAC 02B .0221.
Acute & chronic values for all metals on the NC 026 Standards table are based on the following language in 15A NCAC 02B .0211: Acute =
"Compliance with acute instream metals standards shall only be evaluated using an average of two or more samples collected with one hour."
Chronic = "Compliance with chronic instream metals standards shall only be evaluated using averages of a minimum of four samples taken on
consecutive days, or as a 96-hour average"

m
ANALYTICAL & CONSULTING CHEMISTS
Applied Resource Management
Post Office Box 882
Hampstead NC 28443
Attention: Jim Corvette
Lab ID Sample ID:
17-39678 Site: BG-1
Environmentali s, Inc.
6602 Windmill Way, Wilmington, NC 28405 * 910.392.0223 Lab ° 910.392.4424 Fax
710 Bowsertown Road, Vlanteo, NC 27954 ® 252.473.5702 Lab/Fax
255-A Wilmington Highway, Jacksonville, NC 28540 ® 910.347.5843 Lab/Fax
Test Method
Arsenic EPA 200.7
Total Solids (%) SM 2540 G
Lab ID Sample ID:
17-39680 Site: BG-2
Test Method
info(ct�environmentalchemists.corn
Revised Report: Oct 27, 2017
Original Report Date: Oct 26, 2017
Report #: 2017-16417
Customer ID: 08100006
Project ID:
Collect Date/Time Matrix Sampled by
10/23/2017 12:42 PM Solid/Sludge Client
Results Date Analyzed
<0.216 mg/kg 10/24/2017
90.2 % 10124/2017
Collect Date/Time Matrix Sampled by
10/23/2017 1:00 PM Solid/Sludge Client
Results Date Analyzed
Arsenic EPA 200.7 <0.203 mg/kg 10/24/2017
Total Solids (%} SM 2540 G 98.6 % 10/24/2017
Lab ID Sample ID: Collect Date/Time Matrix Sampled by
17-39681 Site: BG-3 10/23/2017 1:23 PM Solid/Sludge Client
Test Method Results Date Analyzed
Arsenic EPA 200.7 <0.236 mg/kg 10/24/2017
Total Solids (%) SM 2540 G 76.5 % 10/24/2017
Lab ID Sample ID: Collect Date/Time Matrix Sampled by
17-39682 Site: BG-4 10/23/2017 1:42 PM Solid/Sludge Client
Test Method Results Date Analyzed
Arsenic EPA 200.7 <0.234 mg/kg 10/24/2017
Total Solids (%} SM 2540 G 79.9 % 10/24/2017
Lab ID Sample ID: Collect Date/Time Matrix Sampled by
17-39683 Site: S-1 10/23/2017 11:20 AM Solid/Sludge Client
Test Method Results Date Analyzed
Arsenic EPA 200.7 <0.271 mg/kg 10/2412017
Total Solids (%} SM 2540 G 72.8 % 10/24/2017
Report #:: 2017-16417 Page 1 of 2

Applied Resource Management
Revised Report: Oct 27, 2017
Post Office Box 882
Original Report Date: Oct 26, 2017
Hampstead NC 28443
Report #: 2017-16417
Attention: Jim Corvette
Customer ID: 08100006
Project ID:
Lab ID Sample ID:
Collect Date/Time Matrix Sampled by
17-39684 Site: S-2
10/23/2017 11:40 AM Solid/Sludge Client
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
<0.298 mg/kg 10/24/2017
Total Solids (%)
SM 2540 G
69.7 % 10/24/2017
Lab ID Sample ID:
Collect Date/Time Matrix Sampled by
17-39685 Site: S-3
10/23/2017 11:42 AM Solid/Sludge Client
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
<0.266 mg/kg 10/24/2017
Total Solids (%)
SM 2540 G
75.1 % 10/24/2017
Lab ID Sample ID:
Collect Date/Time Matrix Sampled by
17-39686 Site: S-4
10/23/2017 12:00 PM Solid/Sludge Client
Test
Method
Results Date Analyzed
Arsenic
Reporting limit raised due to matrix interference.
EPA 200.7
<0.806 mg/kg 10/26/2017
Total Solids (%)
SM 2540 G
72.7 % 10/24/2017
Lab ID Sample ID:
Collect Date/Time Matrix Sampled by
17-39687 Site: S-5
10/23/2017 12:00 PM Solid/Sludge Client
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
<0.211 mg/kg 10/24/2017
Total Solids (%)
SM 2540 G
97.6 % 10/24/2017
Comment: Results reported to the method detection limit (MDL) and on a dry weight basis.
Reviewed by:
Report #:: 2017-16417 Page 2 of 2

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Applied Resource Management
Post Office Box 882
Hampstead NC 28443
Attention: Jim Corvette
Environmental Chemists, Inc.
6602 Windmill Way, Wilmington, NC 28405 * 910.392.0223 Lab ° 910.392.4424 Fax
710 Bowsertown Road, Manteo, NC 27954 " 252.473.5702 Lab/Fax
255-A Wilmington Highway Jacksonville, NC 28540 ° 910.347.5843 Lab/Fax
info(g;environmentalchemists.com
Revised Report: Oct 27, 2017
Original Report Date: Oct 26, 2017
Report #: 2017-16494
Customer ID: 08100006
Project ID: C. Beach
Lab ID Sample ID: Collect DatelTime Matrix
17-39908 Site: L-1 10/24/2017 2:00 PM Solid/Sludge
Test Method Results
Sampled by
Client
Date Analyzed
Arsenic
EPA 200.7
8.00 mg/kg
10/25/2017
Total Solids (%)
SM 2540 G
13.0 %
10/24/2017
Lab ID Sample ID:
Collect Date/Time
Matrix Sampled by
17-39909 Site: L-2
10/24/2017 11:50 AM
Solid/Sludge Client
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
6.33 mg/kg
10/25/2017
Total Solids (%)
SM 2540 G
21.8 %
10/24/2017
Lab ID Sample ID: Collect Date/Time Matrix Sampled by
17-39910 Site: L-3 10/24/2017 12:10 PM Solid/Sludge Client
Test Method Results Date Analyzed
Arsenic EPA 200.7 <0.450 mg/kg 10/25/2017
Total Solids (%) SM 2540 G 42.6 % 10/24/2017
Lab ID Sample ID: Collect Date/Time Matrix Sampled by
17-39911 Site: L-4 10/24/2017 1:10 PM Solid/Sludge Client
Test Method Results Date Analyzed
Arsenic EPA 200.7 <0.922 mg/kg 10/25/2017
Total Solids (%) SM 2540 G 41.0 % 10/24/2017
Lab ID Sample ID: Collect Date/Time Matrix
17-39912 Site: L-5 10/24/2017 12:15 PM Solid/Sludge
Test Method Results
Sampled by
Client
Arsenic EPA 200.7 2.65 mg/kg
Total Solids (%) SM 2540 G 46.0 %
Report #:: 2017-16494
Date Analyzed
1012512017
10/24/2017
Page 1 of 2

Applied Resource Management
Post Office Box 882
Hampstead NC 28443
Attention: Jim Corvette
Lab ID Sample ID:
17-39913 Site: L-6
Test
Arsenic
Total Solids (%)
Revised Report: Oct 27, 2017
Original Report Date: Oct 26, 2017
Report #: 2017-16494
Customer ID: 08100006
Project ID: C. Beach
Collect Date/Time Matrix Sampled by
10/24/2017 12:30 PM Solid/Sludge Client
Method Results Date Analyzed
EPA 200.7
SM 2540 G
<0.501 mg/kg 10/25/2017
38.8 % 10/24/2017
Lab ID Sample ID: Collect DatelTime Matrix Sampled by
17-39914 Site: Intake 10/24/2017 2:30 PM Water Client
Test Method Results Date Analyzed
Arsenic EPA 200.7 <0.01 mg/L 10/25/2017
Lab ID Sample ID: Collect Date/Time Matrix Sampled by
17-39917 Site: L-4 10/24/2017 2:20 PM Water Client
Test Method Results Date Analyzed
Arsenic EPA 200.7 <0.01 mg/L 10/25/2017
Comment: Results reported to the imethod detection limit (MDL) and on a dry weight basis.
r E
Reviewed by: --' .mjj /
Report #:: 2017-16494 Page 2 of 2

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Applied Resource Management
Date of Report: Oct 26, 2017
Post Office Box 882
Customer PO #:
Hampstead NC
28443
Customer ID: 08100006
Attention:
Jim Corvette
Report #: 2017-16525
.Project ID: C. Beach
Lab ID
Sample ID:
Collect Date/Time Matrix Sampled by
17-39988
Site: MW1
10/25/2017 9:30 AM Water Joe Zuncich
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
<0.010 mg/L 10/26/2017
Lab ID
Sample ID:
Collect Date/Time Matrix Sampled by
17-39989
Site: MW-2
10/25/2017 9:54 AM Water Joe Zuncich
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
<0.010 mg/L 10/26/2017
Lab ID
Sample ID:
Collect Date/Time Matrix Sampled by
17-39990
Site: MW-3
10/25/2017 10:15 AM Water Joe Zuncich
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
<0.010 mg/L 10/26/2017
Lab ID
Sample ID:
Collect Date/Time Matrix Sampled by
17-39991
Site: MW-4
10/25/2017 10:34 AM Water Joe Zuncich
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
<0.010 mg/L 10126/2017
Lab ID
Sample ID:
Collect Date/Time Matrix Sampled by
17-39992
Site: MW-11
10/25/2017 11:09 AM Water Joe Zuncich
Test
Method
Results Date Analyzed
Arsenic
EPA 200.7
<0.010 mg/L 10/26/2017
Comment:
Reviewed by:
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Report #:: 2017-16525 Page 1 of 1

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