HammondCenter.05273-05.VI.WorkPlan.FINAL

AkUNITED
CONSULTING
REPORT
For NCDEQ
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County,
North Carolina
NCBP# 25087-21-092

UNITED
CONSULTING
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
July 26, 2022
North Carolina Department of Environmental Quality
Division of Waste Management — Brownfields Program
1646 Mail Service Center
Raleigh, North Carolina 27699
Via Email: shristi.shrestha(@ncdenr.gov; sharon.eckard(a)ncdenr.gov
RE: Vapor Intrusion Work Plan
Hammond Center Drive Site
100 Knowles Street
Raleigh, Wake County, North Carolina
Brownfields Project Number 25087-21-092
Dear Ms. Shrestha:
United Consulting is pleased to submit this Vapor Intrusion Work Plan on behalf of Maple Multi -Family
Land SE, LP (Prospective Developer) to conduct additional soil -gas sampling on the above referenced
proposed Brownfields property (herein referred to as the "Site"). The purpose of this additional sampling
is to further assess the potential risks for vapor intrusion in the proposed development areas of the Site.
Please contact us if you have any questions or if we can be of further assistance.
United Consulting Group, Ltd is licensed to practice geology and engineering in North Carolina, with
associated certification numbers of C-344 and C-1847, respectively.
UNITED C NSULTING
v�
Br i ton Bic taff, C
Senior Environmental Specialist
bbickerstaff(a)-unitedconsulting.com
Developer Contacts:
Mark Mathews — mmathews(c)tcr.com
Sean Allen — sallen tcr.com
ssell . Griebel, P.G.
Executive Vice President/Chief Consultant
rgriebel(@unitedconsulting.com
625 Holcomb Bridge Road, Norcross, GA 30071 • 770-209-0029 • unitedconsulting.com
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UNITED
CONSULTING
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
Page 3 of 9
TABLE OF CONTENTS
1.0 INTRODUCTION....................................................................................................................4
2.0 ADDITIONAL SOIL GAS SAMPLING SCOPE....................................................................... 6
3.0 SAMPLING METHODOLOGY/QA/QC................................................................................... 7
4.0 LABORATORY ANALYSES................................................................................................... 8
5.0 REPORTING..........................................................................................................................9
FIGURES
Figure 1
Topographic Map
Figure 2A
Historic Sample Locations (Aerial Photograph)
Figure 2B
Historic Sample Locations (Conceptual Site Plan)
Figure 3A
Proposed Soil Gas Sampling Locations (Aerial Photograph)
Figure 3B
Proposed Soil Gas Sampling Locations (Utility Plan)
TABLES
Table 1 Summary of Soil Analytical Testing Results — Detections Only
Table 2 Summary of Groundwater Analytical Testing Results — Detections Only
APPENDICES
Appendix A Utility Plan/Foundation Plans
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UNITED
CONSULTING
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
Page 4 of 9
1.0 INTRODUCTION
The Site consists of a 35.77-acre parcel, Parcel ID 1702760750 with the referenced address of 100
Knowles Street, Raleigh, Wake County, North Carolina. The Site was recently accepted into the North
Carolina Brownfields program and assigned Project No. 25087-21-092. The Site has historically been
undeveloped land and is currently undeveloped and vacant. A stream, Wildcat Branch, is located on the
eastern portion of the property which flows to the north. The Prospective Developer is proposing to
develop the Site with a multifamily apartment community which will consist of three multi -story apartment
buildings and a clubhouse. The buildings will be slab -on -grade with shallow foundations. The proposed
development is located on the western portion of the property, west of Wildcat Branch. A site
location/USGS topographic map is included as Figure 1.
Multiple subsurface investigations have been conducted at the Site to assess for impacts from the eastern
adjoining Raleigh Metals facility, as well as the northern adjoining Evergreen Packaging facility. Of note,
the groundwater sample previously collected from temporary monitoring well UCMW-2 in May of 2021
(collected from the eastern portion of the Site) identified tetrachloroethene at an estimated concentration
of 2 micrograms per liter (fag/L), which was below the residential and industrial DEQ Division of Waste
Management (DWM) Vapor Intrusion Groundwater Screening Level (GWSL) but above the DEQ 2L
Standard. Trichloroethene was also detected at an estimated concentration of 1.6 tag/L in UCMW-2,
which was below the DEQ 2L Standard and industrial GWSL, but above the residential GWSL. A low
concentration of cis-1,2-dichloroethene was also reported in the groundwater sample collected from
UCMW-2 at that time, which was below its DEQ 2L Standard and respective GWSLs.
No other volatiles were reported in the remaining groundwater samples collected from the Site at that
time or during our subsequent investigation conducted on the Site in October of 2021, which generally
included sampling locations across the Site. Based on the overall data, groundwater impacts detected
at the Site appear to be isolated to the eastern portion of the property, on the east side Wildcat Branch
creek and appear to have migrated onto the Site from the eastern adjoining Raleigh Metals facility.
Further, it appears that Wildcat Branch has created a hydraulic barrier at the Site as no groundwater
impacts have been detected east of the creek.
No soil impacts have been detected at the Site in excess of their respective residential Preliminary Soil
Remediation Goals (PSRGs), with exception of arsenic and hexavalent chromium. The detected arsenic
concentrations are consistent with published, naturally occurring background concentrations in the area.
No known source for the hexavalent chromium has been identified on the Site or adjoining properties.
The hexavalent chromium has been delineated and is proposed to be remediated from the Site.
Six soil gas samples were previously collected from the approximate footprints of the proposed buildings
and submitted for analysis of volatile organic compounds (VOCs) via EPA Method TO-15. Evaluation of
the soil gas data did not indicate further assessment or mitigation was warranted, in United Consulting's
opinion.
However, based on recent communications with NCDEQ Brownfields staff, Brownfields staff did not
believe the integrity of the samples could be confirmed and did not believe the sample collection and
analysis was done to the program's assessment requirements. This was considered a Brownfields
assessment data gap by NCDEQ Brownfields staff, and Brownfields staff further requested additional
testing near proposed utility corridors and elevator shafts.
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UNITED
CONSULTING
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
Page 5 of 9
The locations of the historical soil, groundwater and soil gas samples collected at the Site are shown on
Figures 2A and 213, with the analytical results summarized in Tables 1 and 2.
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UNITED
CONSULTING
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
Page 6 of 9
2.0 ADDITIONAL SOIL GAS SAMPLING SCOPE
This proposed additional soil gas sampling scope was developed in accordance with the North Carolina
Division of Waste Management (NCDWM) VI Guidance (March 2018), the NCDEQ Brownfields
Program Vapor Intrusion Assessment Workplan & Checklist (updated March 2022) and the Interstate
Technical and Regulatory Council's Vapor Intrusion: A Practical Guideline (2007) and Vapor
Intrusion Pathway: Approaches for Typical Scenarios (2007).
United Consulting will obtain ten exterior soil gas samples from the Site. Six of the soil gas samples
will be obtained from within the footprint of the three proposed multifamily buildings, two per building
footprint, with one being collected from the approximate area of the proposed elevator locations.
These will be designated UCSV-B1 through UCSV-136. Three exterior soil gas samples will be
collected from the locations of proposed utility corridors leading into the Site. These will be designated
UCSV-U1 through UCSV-U3. One duplicate soil gas sample will also be collected for QA/QC
purposes.
The locations of the proposed sampling locations are illustrated on Figures 3A and 3B. The foundation
plans for the proposed buildings (showing the elevator areas) are included as Appendix A, along with
the Site's proposed utility plan.
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UNITED
CONSULTING
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
Page 7 of 9
3.0 SAMPLING METHODOLOGY/QA/QC
A dedicated gas vapor probe tip with new dedicated tubing will be attached to a post -run tubing rod and
driven to the sampling depth of 3 feet below the ground surface (bgs) using a slide hammer. The sampler
will then be opened by retracting the gas vapor probe extension rod by approximately one inch. The
samplers will be left to equilibrate with the subsurface for a minimum of two hours prior to sampling. Of
note, recent geotechnical investigations at the Site indicate that groundwater in the general area of the
proposed buildings ranges from approximately 3 to 5.5 feet bgs, specifically in the areas of Buildings 3
and 4 (the northernmost proposed buildings).
To test the viability of the sampling train and the vapor sampling point seals, a shut-in test and a helium
tracer test will be performed at each sampling point. The shut-in test will be conducted by attaching the
laboratory -supplied Summa canister and flow controller manifold to be used at each point to Teflon lined
tubing and a syringe. The syringe will be used to create a vacuum within the flow controller manifold, at
which point, the manifold's shut-off valve will be closed. The Summa canister and manifold will be allowed
to sit sealed from the atmosphere for a minimum of five minutes and the pressure within the manifold at
the beginning and the end of the shut-in period will be recorded and compared. If there is no observable
loss of pressure during the shut-in test period, the Summa canister and manifold will be deemed suitable
for sample collection.
The tracer gas serves as a quality assurance/quality control (QA/QC) method to verify the integrity of the
soil vapor probe seal. A field instrument capable of detecting helium will be used to verify the presence
and concentration of the tracer gas. The protocol for using a tracer gas is to enclose the tubing and
ground interface with a shroud and enrich the shroud atmosphere with helium (typically to approximately
15%). Three volumes of the vapor point annulus and attached Teflon lined tubing will be purged. Purge
samples will be field -screened for helium after each purge volume to assess for the presence of leaks in
the seal and fittings using an MGD-2002 helium/hydrogen meter (or equivalent device) and for volatile
vapors using a photo -ionization detector (PID). Sample collection will begin if the tracer testing indicates
helium concentrations in the vapor point are less than 10 percent of the helium concentration in the
shroud, indicating a sealed vapor point annulus.
Post purging activities, the soil gas samples will be collected in a laboratory supplied, batch -certified 1-
liter Summa canister with a flow controller set for to draw air at less than 200 milliliters per minute (mL/
min). The vacuum pressure of the sample canister will be monitored and recorded at regular intervals
throughout the sampling period. United Consulting will cease sample collection prior to the vacuum
pressure reaching negative 5 inches mercury (residual vacuum).
625 Holcomb Bridge Road, Norcross, GA 30071 • 770-209-0029 • unitedconsulting.com
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UNITED
CONSULTING
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
Page 8 of 9
4.0 LABORATORY ANALYSES
Following completion of the sampling activities, the summa canisters, along with chain -of -custody
documentation, will be shipped to H&P Mobile Chemistry (H&P) in Carlsbad, California for laboratory
analysis of volatile organic compounds (VOCs) by EPA Method TO-15. United Consulting will confirm
with H&P to ensure that the method detection limits will be lower than the applicable screening level
concentrations. Estimated concentrations (between the laboratory reporting limits and method detection
limits) will be included in the laboratory report. United Consulting will also request that a level 2 QA/QC
be included with the report to document the quality of the analytical data.
625 Holcomb Bridge Road, Norcross, GA 30071 • 770-209-0029 • unitedconsulting.com
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UNITED
CONSULTING
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
Page 9 of 9
5.0 REPORTING
Upon completion of the additional vapor intrusion investigation, a report summarizing the results of the
investigation activities will be prepared. The report will include documentation of field activities, the
laboratory analytical report, figures depicting the sample locations, and a table summarizing and
comparing the sub -slab vapor results to their respective NCDEQ Residential and Non -Residential Vapor
Intrusion Sub -Slab and Exterior Soil Gas Screening Levels (SGSLs), as well as the results of the
modeling obtained through the NCDEQ Risk Calculator. Conclusions and recommendations pertaining
to the potential VI pathway(s) will be included in the report.
625 Holcomb Bridge Road, Norcross, GA 30071 • 770-209-0029 • unitedconsulting.com
We're here for you.

FIGURES
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
625 Holcomb Bridge Road, Norcross, GA 30071 • 770-209-0029 • unitedconsulting.com
We're here for you.

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UNITED N 0 500 1,000 Checked: BNB Project: Hammond Center Drive Site FIG.
IG■ 1
CONSULTING 1 inch = 750 feet Project No. 22-NC-05273-05
Date: 7/16/22 Client: Maple Multi -Family Land SE, LP

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Sample Location
Soil Sample Location
(October 2021)
_ M
Previous Sample
s A_ Note: Location (May 2021)
J Project Site boundary based on review of Wake
County parcel data, accessed on September 14,
2021. Original version of this drawing is provided
in full -color, black -and -white reproductions may
not accurately depict certain information.
c'
UNITED
CONSULTING
Project:
Hammond Center Drive Site
Client:
Maple Multi -Family Land SE, LP
Sheet Historic Sample Locations
Title:
(Aerial Photograph)
��- Scale: N 0 75 150 300
1 inch = 275 feet
' Prepared: B. Sharp
Checked: B. Bickerstaff
'i Date: July 16, 2022
Project No. 22-NC-05273-05
i Figure 2A

Map Index
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Legend
Project Site Boundary
Groundwater Sample
Location (October 2021)
Soil Gas Sample Location
Soil Sample Location
(October 2021)
Previous Sample
Location (May 2021)
Note:
Project Site boundary based on review of Wake
County parcel data, accessed on September 14,
2021. Original version of this drawing is provided
in full -color, black -and -white reproductions may
not accurately depict certain information.
UNITED
CONSULTING
Project:
Hammond Center Drive Site
Client:
Maple Multi -Family Land SE, LP
Sheet Historic Sample Locations
Title: (Conceptual Site Plan)
Scale: N
0 75 150 300
A1
inch = 275 feet
Prepared:
B. Sharp
Checked:
B. Bickerstaff
Date:
July 16, 2022
Project No.
22-NC-05273-05
Figure 2B
References: ESRI (2021); Wake County Parcel Data (September 2021)

] �.•��� r$ti. Map Index
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Legend
Proposed Sample Locations
UCSV-B2 UCSV-B4 - UCSV-B6
0 =Z-7 - 0
UCSV-U1 r y UCSV-U2 UCSV-U3
.+
• UNITED
CONSULTING
• i �/ 625 Holcomb Bridge Road, Norcross, Georgia 30071
770-209-0029 Fax [phone] www.unitedconsulting.com
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Sheet Proposed Soil Gas Sampling
v• 1 f �,' • • +,, Title: Locations (Aerial Photograph)
•1� Scale: 0 25 50 100
-01
1 inch = 100 feet
' ■y '' .� n ,,ter ' �` Prepared: S. Cox
1' ,
' 1 r� _ *' f Checked: B. Bickerstaff
' ;�i��r •. r r Date: Jul 18, 2022
+, ' '� '"�� ' �r �+ • }i• • Project No. 22-NC-05273-05
References: �► +'i �- t + 't +� S.
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Map Index
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Hammond Center Drive Site
' = s,`r„v.�_- - y� _ � t "� 7• s'm�,eh` ATM,„; •4.s.,..�.Y °i ; �'
Client:
•_ r N� , C << I`i �'•.,'*' '! rt Maple Multi -Family Land SE, LP
�° - R ` , ~��` Q F '� , Sheet Proposed Soil Gas Sampling
•" ` 'fir 7 , f `
�� � �� ,i� l,� � '����•—�" �:�;, "�__,�E ' - � „ Title: Locations (Utility Plan)
b "+ -�rx t ■ l.� j ^�.� Scale: 0 25 50 100
l/ _._._._._..._ _. _.�._._. _ '.� § `k i ''s i,t _ _ __ _•r.� _ ~� m, .- - �i . - - 1 inch = 100 feet
jA+l.7
tPrepared S. Cox
- _ .�' f�. _ - � � � w Y - •� .. � r � s` Checked: B. Bickerstaff
Date: Jul 18, 2022
' n y� ~ ~ ~�s _.� w �.�• ' �"$` Project No. 22-NC-05273-05
�.,. ; � -rk. ~�� •,! ' .. r �.� � N fY � i �".w '... � -_" +' 41. P:. 97ula-xr ! �.
,, '1! , \ti • -x i L\ 1 sxrw n e �� _ _ . • , , 1' Figure 3 B
References:�Utility Plan.by McAdams dated 01.14.2022 "- 1 l!. ' d► ,

TABLES
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
625 Holcomb Bridge Road, Norcross, GA 30071 • 770-209-0029 • unitedconsulting.com
We're here for you.

TABLE 1 - SUMMARY OF SOIL ANALYTICAL RESULTS - DETECTIONS ONLY
Sample Collection Date: 14-May-21 14-May-21
14-May-21
15-Oct-21
15-Oct-21 15-Oct-21 15-Oct-21 15-Oct-21
15-Oct-21
15-Oct-21 15-Oct-21
15-Oct-21
15-Oct-21
15-Oct-21 15-Oct-21 15-Oct-21 is-Oct-21
15-Oct-21
Sample Depth (feet):
Residential Preliminary Industrial/Commercial 0'-1'
Soil Remediation Goals
(PSRGs)' PRSGst
10'-11' 0'-1'
10'-11'
9'-10,
2'-3'
0'-1' 0'-1' 2'-4' 0'-2'
0'-2'
0'-1' 0'-1.
0'-1.
0'-1.
0'-1.
13'-14' 0'-1. 0'-1. 0'-1'
12'-13'
0'-1.
Constituents
Resource Conservation and Recory Act Metals (RCRA 8 Metals) (mg/Kg)
Arsenic
0.68
3
<0.000345
<0.000357
<0.000366
<0.000384
<0.000347
0.123J
0.2231
0.795
0.103J
0.1081
0.1971
0.711
0.882
0.3171
0.67
1.64
0.3871
0.652
0.535
0.120J
<0.0663
0.507J
Barium
3100
47000
31.6
40.1
64.7
41.6
93.8
3.98
83.1
169
22
49.3
32.3
122
122
117
161
5.91
23
43.6
79.3
82.3
19
67.2
Cadmium
14
200
0.0485 J
<0.0431
0.0778 J
<0.0464
0.0923 J
<0.0167
0.0421J
0.0428J
0.0285J
0.0026J
<0.0194
0.0557J
0.0772J
0.0338J
0.092J
0.826J
0.0341J
0.0361J
0.0351J
<0.0189
<0.0151
82.9J
Chromium (total)
NE
NE
8.26
5.56
16.1
4.63
10.5
19.3
48.4
109
1.41
3.07
1.34
46.5
22.4
0.946
35.2
19.0
2.28
6.73
30.6
29.9
0.193J
23.3
Chromium, as Cr3+
23000
350000
8.26
5.56
16.1
4.63
10.5
19.3
48.4
108
1.41J
3.07
1.34J
46.5
22.4
0.946J
35.2
19.0
2.28J
6.73
30.6
29.9
NA
23.3
Chromium (A)
0.31
3.8
<0.871
<0.871
<0.871
<0.871
<0.871
<0.669
<0.721
1.391
<0.781
<0.695
<0.693
<0.761
<0.676
<0.724
<0.762
<0.778
<0.667
<0.734
<0.729
<0.703
NA
<0.820
Lead
400
800
9.77
3.91 J
14
8.84
4.06 J
0.747
6.02
26.7
1.93
5.06
7.6
13.5
15.1
4.16
7.52
17.1
4.12
17.7
14.8
6.07
1.42
10.2
Selenium
78
1200
<0.000634
<0.000657
<0.000674
<0.000706
<0.000639
0.1701
0.0086J
0.5181
0.0875J
0.1031
0.124J
0.4241
0.443J
0.1681
0.4761
0.6641
0.1141
0.201J
0.3201
0.161
<0.0592
0.2851
Silver
78
1200
<0.0107
0.0178J
<0.0114
<0.0119
<0.0108
0.00976J
0.006J
0.00966J
0.00575J
0.00328J
0.00939J
0.01661
0.0224J
0.00880J
0.018J
0.0224J
0.0073J
0.0121J
C.00958J
<0.00323
<0.00259
0.0213J
Volatile Organic Compounds (VOCs) (µg/Kg)
2-Butanone
5500000
40000000
<9.0
<12
<12
<17
<13
<9.6
<10
<13
0.024J
<12
<11
<14
<9.1
<11
<9.8
<10
<9.8
<14
<9.3
<11
<11
<19
Acetone
12000000
140000000
250
20J
300
24J
22J
0.0321
130
79J
0.039J
0.0201
48J
150
0.077J
210
0.0241
0.080.1
<7.0
0.0831
320
120
<8.3
0.140J
Benzene
0.0012
0.0054
<0.36
<0.49
<0.46
<0.66
<0.5
<0.38
<0.41
<0.51
0.00095J
<0.49
<0.44
<0.56
<0.36
<0.43
<0.39
<0.39
<0.39
<0.56
<0.37
<0.45
<0.45
<0.74
Ethylbenzene
6100
27000
<0.51
<0.7
<0.66
<0.94
<0.72
<5.4
<0.58
<0.73
<0.66
18
<0.62
<0.8
<0.52
<0.62
<0.55
<0.57
<0.55
<0.8
<0.53
<0.64
<0.65
<1.1
Cyclohexane
1400000
5800000
1.6J
2.1J
2.0J
2.4J
2.2J
<1.2
<0.39
<1.6
<1.4
<1.5
<1.4
<1.7
<1.1
<1.4
<1.2
<1.2
<1.2
<1.7
<1.2
<1.4
<1.4
<2.3
Toulene
990000
9700000
<0.34
<0.47
<0.44
<0.63
<0.48
<0.36
<0.39
<0.49
<0.44
<0.47
0.771
<0.53
<0.35
<0.42
<0.37
<0.38
<0.37
<0.54
<0.35
<0.43
<0.44
<0.71
m,p-Xylene
120000
500000
<3.1
<3.4
<3.4
<2.0
<1.5
<1.1
<3.2
<1.5
<3.4
98
<3.3
<1.7
<3.1
<1.3
<3.1
<1.2
<3.2
<1.7
<3.1
<1.3
<3.4
<2.2
o-Xylene
140000
590000
<0.58
<0.79
<0.75
1 1.1
<0.81
1 <0.61
<0.66
<0.82
<0.75
45
<0.71
<0.9
<0.58
<0.71
<0.63
<0.64
<0.63
<0.91
<0.6
<0.72
<0.74
<1.2
Polychlorinated Biphenyls (PCBs)(µg/Kg)
Target Compound List Various Various ND ND ND ND ND I ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND
Semi -Volatile Organic Compounds (SVOCs) (µg/Kg)
Target Compound List Various Various
ND
ND
ND
ND
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SIM Polynuclear Aromatic Hydrocarbons (µg/Kg)
Benz(a)anthracene
1100
21000
NA
NA
NA
NA
NA
<1.1
<1.2
<1.4
<1.3
<1.2
<1.2
<1.3
<1.2
<1.2
<1.3
<1.3
<1.1
<1.2
<1.3
<1.2
<1.1
1.6J
Benzo(a)pyrene
110
2100
NA
NA
NA
NA
NA
<0.41
<0.44
<0.5
<0.47
<0.42
<0.43
<0.46
<0.41
<0.44
<0.46
<0.47
<0.4
<0.44
<0.45
<0.43
<0.39
1.51
Benz o(b)fluoranthene
1100
21000
NA
NA
NA
NA
NA
<1.0
<1.1
<1.3
<1.7
<1.1
<1.1
<1.2
<1.1
<1.1
<1.2
<1.8
<1.5
<1.1
<1.1
<1.1
<1.0
2.11
Chrysene
110000
2100000
NA
NA
NA
NA
NA
<1.7
<1.8
<2.0
<1.9
<1.7
<1.7
<1.9
<1.7
<1.8
<1.9
<1.9
<1.7
<1.8
<1.8
<1.7
<1.6
2.4
lu Fora2!hene
480000
6000000
NA
NA
NA
NA
NA
<1.2
<1.8
<1.4
<1.4
<1.2
<1.2
<1.3
1.6J
<1.3
<1.3
<1.4
<1.2
<1.3
<1.3
<1.2
<1.1
4.11
Phenanthrene
NE
NE
NA
NA
NA
NA
NA
<0.64
<0.68
<0.77
<0.73
<0.66
<0.67
<0.72
0.92J
<0.69
<0.72
<0.74
<0.63
<0.69
<0.7
<0.66
<0.61
2.OJ
Pyrene
360000
4500000
1 NA
I NA
I NA
NA
NA
<1.4
1 <1.5
1 <1.7
1 <1.6
<1.5
I <1.5
I <1.6
I 1.7J
<1.5
I <1.6
I <1.6
I <1.4
I <1.5
I <1.5
I <1.5
I <1.4
3.7
Notes:
Exceeds State of North Carolina Department of Environmental Quality (NCDEQ) residential Prelimenary Soil Remediation Goals (PSRGs)
XX - Exceeds NCDEQlndustrial/Commercial Standards
ND - Non Detect
<aftsp - Laboratory Method Detection Limit for Constituent
NA - Not analyzed
' - North Carolina Department of Environmental Quality (DEQ) Inactive Hazardous Sites Branch (IHSB)
Preliminary Soil Remediation Goals (PSRGs) dated June 2021
1 Estimated value detected below the Reporting Limit
THIS TABLE SUMMARIZES DETECTED CONSTITUENTS IN THE SAMPLES ANALYZED. REMAINING CONSTITUENTS NOT LISTED
INDICATE RESULTS BELOW THE LABORATORY DETECTION LIMITS. (I.E. NOT DETECTED IN THE SAMPLE ABOVE QUANTITATION
LIMITS)
1of1

TABLE 2 - SUMMARY OF GROUNDWATER ANALYTICAL RESULTS - DETECTIONS ONLY
14-May-21
14-May-21 14-May-21
16-Oct-21
16-Oct-21
16-Oct-21
Volatile Organic Compounds VOCs u /L
Acetone
6,000
4,500,000
19,000,000
16 J
<8.3
-8.3
<8.3
8.3
<8.3
Cis- 1,2-Dichloroethene
70
NE
NE
<0.5
3.2 J
<0.5
<0.5
<0.5
<0.5
Tetrachloroethene
0.7
12
48
<0.3
2.0 J
<0.3
<0.3
<0.3
<0.3
Trichloroethene
3
1
1 4.4
<0.21
1.6 J
<0.21
<0.21
<0.21
<0.21
Semi Volatile Organic Compounds SVOCs /Polynuclear Aromatic Hydrocarbons PAHs ug/L)
TCL List Various Various Various ND NIL ND ND ND
Total Metals m /L
Arsenic
0.01
-
-
<0.0072
<0.0072
<0.0072
<0.00205
<0.00205
0.00241 J
Barium
0.7
-
-
0.0809
0.156
0.0392
0.101
0.0837
0.486
Cadmium
0.002
-
-
<0.0019
--0.0019
<0.0019
<0.0000961
<0.0000961
0.000465J
Chromium
0.01
-
-
0.015
0.0591
<0.0032
0.0085
0.0106
0.0222
Lead
0.015
-
-
<0.0038
0.0152
<0.0038
0.00989
1 0.00619
1 0.0247
Selenium
0.02
-
-
<0.0074
<0.0074
<0.0074
<0.0005
<0.0005
0.0025J
Dissolved Metals (mg/L)
Barium
0.7
-
-
0.0077 J
0.0545
0.0296
0.0288
0.0339
0.195
Selenium
0.02
1-
-
t
1 0.0099 J
1 <0.0074
1
<0.005
Notes:
Highlight Exceeds 2L Standards'
Highlight Exceeds Residential GWSLs2
< ##.## Below Method Detection Limit for Constituent
J - Estimated value detected below the Reporting Limit
NE - Not established
' - North Carolina Department of Environmental Quality (DEQ) 15A NCAC 02L.0202 Groundwater Standards (21- Standards) dated April 2013
2 - DEQ Division of Waste Management (DWM) Vapor Intrusion Groundwater Screening Levels (GWSLs) dated June 2021
THIS TABLE SUMMARIZES DETECTED CONSTITUENTS IN THE SAMPLES ANALYZED. REMAINING CONSTITUENTS NOT LISTED INDICATE RESULTS BELOW THE
LABORATORY DETECTION LIMITS. (I.E. NOT DETECTED IN THE SAMPLE ABOVE QUANTITATION LIMITS)

APPENDIX A
Utility Plan/Foundation Plans
Vapor Intrusion Work Plan
Hammond Center Drive Site
Raleigh, Wake County, North Carolina
TMCRW-22-NC-05273-05
625 Holcomb Bridge Road, Norcross, GA 30071 • 770-209-0029 • unitedconsulting.com
We're here for you.

VIRGINIA
PIN:
D.B. 17
v
EX. ACCESS EASEMENT / N/F - - - - - - - - - - - - -
I I I \ B.M. 1974, PG. 115 / I HAYWOOD FUNERAL HOME INC - _ N/F
/ 60, D.B. 6015 N2PG 6136 P 8 - - - t EX. FENCE SOVIN:170026821ION 82
VANESSA SMITH - � LP
N/F EX. PROPERTY LINE / - - D.B. 12292, PG. 1644
I I I I PIN:1702674576 / I _- cnI _ I I I I N/F � D.B. 10619, PG. 126 / _ I _ - _ �_ - _ �
I I I I OHAGAN LLC -
I I I I I I PIN:1702675307
I I D.B. 8802, PG. 1015 _ — - -_-
I I I I I _ _ _ l_ _ - EX. CITY OF RALEIGH WATER
I I II I WINDSORFCREST IPJC & RWC INVESTMENTS,IILLC _ - / / _ - _ _ - _ - TRANSMISSION MAIN EASEMENT
_ _ EX. RAW WATER MAIN
_ / - - � � _ _ _ - _ EASEMENT D.B. 13227, PG. 1953
N/F I PROPERTIES INC I PIN:170267521 _ _ �- _ _ _ _ - D.B. EN PG. 307
II I MICHAEL YACOBUCCI PIN:1702675221 I D.B. 16141, PG. 502 I _ - / ' _ _ _
I I I N/F PIN:1702675135 I _ _ ` 6 BUILDING SETBACK _ - RETAINING WALL,
I JUAN MILIAN, ET.AL. I D.B. 4539, PG. 379 D.B. 14827, PG. 189 I I _ -
I� I PIN:1702675049 I I I _ ' �_ _ TYP. (DESIGN BY
N/F I I o N/F I D.B. 15886, PG. 40 I I _ _ _ _ I _ _ -
ATKINS, ET.AL. KERRY GILMORE, ET.AL. I I - _
02665951 I I _- I �� j/ c3 G
19, PG. 2242I OTHERS)
I I PIN:1702675042 I I _ cc4l
1 D.B. 15886, PG. 40 I I I - ' rcccccccc HOSE BIB PROOF
/ -
cccccccccccl WATER SERVICE
EX. CITY OF RALEIGH cccccccc
_
3� I SDAB ITA642RY I I EX. FENCE I x—x xJ I o - - I c c c c c c c c c c c c c c c c c c c cccccc
■ •.
Y. �►- - - x, EX. RAW WATER LINE EASEMENT cccccccc c
I c I D.B. 588, PG. 377Pill
�c c
pVC WATER MAIN FIRE HYDRANT
" x8" TEE
RETAINING WALL, PRIVATE ASSEMBLY (TYP.)
8
(2) 8„ GV&B
OTHERS _
(DESIGN BY
o _ - _ - _ �= SSMH
— _ - I
-
- � 1
_ - 4- `•f 6' BUILDING SETBACK
EX. BUFFER / PROP. SANITARY SEWER 7:'�
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- - m EX. CITY OF RALEIGH SSMH
TRANSMISSION MAIN WATER MAIN I /
EASEMENT g" PVC (NP )
I EX. FENCE
D.B. 13227, PG. 1953 (pRNATE) -� I
EX. SSMH � II EX. SD \ / I PROP. SANITARY SEWER �
I I FIRE HYDRANT I
I WATER SERVICE _ SERVICE (TYP.) I
ASSEMBLY (TYP.) I I
--' I
I
_ 1 I 0 a�
J � I
- " I I I UTILITY ROOM TO HOUS __, H
--------- II BUILDING BACKFLOW PREVENTERS D I
FOR FIRE (RPDA) AND z '_
(] II PROP. SANITARY SEWER I I BUILDING co ® DOMESTIC (RPZ) SERVICE --'
------------�--- II IJ I SERVICE (TYP.) I ICD 109,616 SF
------------ I v SSMH I I 109,616 SF
----------------- I I (TYP.) I
.---_----- 1 m 4" DOMESTIC SERVICE /
--'=;_____---- _t II I 4" DOMESTIC SERVICE D 6" FIRE SERVICE
;I o 6" FIRE SERVICE z _'� EX. SSMH
- --" ~ I I I v_ FIRE DEPARTMEN v • _-,
UTILITY ROOM TO HOUSE z CONNECTION I
i I < ❑ BACKFLOW PREVENTERS
EX. CITY OF RA El n
I I ASSEMBLY (TYP.) �• __
� I SANITARY SEWER ENT � FOR FIRE (RPDA) AND --
DOMESTIC (RPZ) SERVICES
• I � �
OD 4I !I w I
v " DOMESTIC SERVICE x FIRE DEPARTMENT -�
I
I z BUILDING 6" FIRE SERVICE x CONNECTION PROP. SANITARY SEWER �� I
j n FIRE HYDRANT E MH SERVICE (TYP.) I
It LAO ASSEMBLY (TYP.)
I I I
? 109,616 SF UTILITY ROOM TO HOUSE PROP. SANITARY SEWER
I
I 30' o cn BACKFLOW PREVENTERS SERVICE (TYP.)
� FOR FIRE (RPDA) AND
1
;10 DOMESTIC (RPZ) SERVICES
j I � EX. 5' UTILITY EX. FIRE HYDRANT
a z BUILDING PLACEMENT EASEMENT ASSEMBLY
0
It
- O _ _ -_ --- __ - ► - EX. SSMH
FIRE DEPARTMENT ____ _ _ _----
I � iN - EX. POWER POLE '
I CONNECTION 4" DOMESTIC SERVICE
I N 6" FIRE SERVICE
FIRE HYDRANT
ASSEMBLY (TYP.) PROP. SANITARY SEWER
PROP. SANITARY SEWER SERVICE (TYP.) _ _-- _----
SERVICE (TYP.)
EX. 8" MASTER WATER -____ Lt_t _--___-_- - I _ — - - --------------� _ I I
METER g.. --___ I-1 I I
SSMH __-- _----- - I p�C S FIRE DEPARTMEN_T___--
T,P EX. 8" MASTER BACKFLOW r
v I (TYP.)
) PREVEN MA _ 1 F/� C_O_N�IEGTI6tt--_ _ X. SSMH
,�_--- _� MH EX 8 PVC SS MAIN - -
EX. FIRE HYDRANT
r*m / i' i ASSEMBLY / I _ AIEX. TREELINESSMH TER MAIN r
E=Dip A
I
I
_ - - k/
EX. 5I
-_=-------------- I ----- _ _ _ ' UTILITY
EX. SS (UNDER REVIEW 1 z �i _ __- � - -_ \ _ _ -____n I / \ _ PLACEMENT EASEMENT I
WITH WILDCAT BRANCH EX. PROPERTY LINE I I
IMPROVEMENTS)
EX. 6' BUILDING SETBACK Y'
EX. ROW
EX. SSMH EX. FIRE HYDRA
ASSEMBLY I I
+ _ _ EX. PROPERTY LINE I
- -_�__ / c --100-YR FLOODPLAIN
- -- + CO
�� i Q� i i' _ _ \ EFFECTIVE
_WETLANDS, TYP. / / i (EFFECTIVE)
+ - /_ �} 0'/'
\ / TIE TO EXISTING SS + \ � + +
EX. SSMH
+ - + +� �+ + + \ \ / \ EX. SANITARY SEWER
EX / ! I
. 10' PARKING SETBACK h\� i
- + + + + ' F--_� \+ + + EASEMENT
EX. 6' BUILDING SETBACK
100-YR FLOODW Y 5 / N/F
+ + + + + + -� �- + // STREAM BUFFER,
+ + + + + + + \ `k' \ \ (EFFECTIVE) \ T,P EVERGREEN PACKAGING INC
/ EX. RETAINING WALL \ \ \\ \ \ / , PIN:1702687425
EX. PROPERTY LINE / + + + + + + + \\ + \ \ D.B. 12390, PG. 290
EX. ROW + + + \ \\ \ \ _ EX. SSMH
+ \\\ A + \\ \ \ \ \' � EX. TREELINE
EX. CITY OF RALEIGH i
WATER EASEMENT
+ I I \ \ D.B. 1097, PG. 625
EX. TREELINE
EX. SSMH \\ /+
. CONCRETE SIDEWALK / �� \ / - - - I \\ +
Jm +
\� EX. FENCE 4i / I I \ \\ \ +
I \ w EX. HYDRANT
1 \\ \ \
EX. CITY OF RALEIGH
SANITARY SEWER EASEMENT
\ / / D.B. 1417, PG. 91
EX. FENCE ` _ --
EX. W L \ EX. TREELINE
EX. POWER POLE
_ - \ / ou EX. CITY OF RALEIGH RAW l I I \ 1 \
1 / \ \ WATER EASEMENT '
u - D.B. 1642, PG. 85 EX. SS
\ \ EX. OVERHEAD POWER
ou ot, , , LINES
\ \ I I
ou \ \ 1 \ \ ^i ` \\ 1 \\\ WETLANDS, TYP. \ \ I
EX. HYDRANT /� / I I \ / r' \ \ it ` \\ \ \ + +
EX. CITY OF RALEIGH WATER + + +
/\\\\ \ \\\ SANITARY SEWER EASEMENT + + + + + + +
EX. OVERHY POWER / - - \ \ r /
LINES io EX. ROW I \ \ \ \
� �Rw EX. POWER POLE � �\ \ � J \ \ � \
EX. W/L
1
I \ \ \ \ \ + + + + + + + + + + + + + + +ZD I I
o \ \ \ —— +\�-� , + + + + + + + + + _+ __�-- + + +
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I ou\\\ \ \ \+ + + + + _+__- + + + + + + It 1 o
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\ \ \ \ \ EX. POWER POLE + + + now+n0 + + + I An
no + + + + + + +
EX. FIBER OPTIC CABLES \ \ \ \ \ \ - - \ \ \ _ - - C /
\ \ + + + ++
oufto
Mas E. POWER EASEMENT EXLINES_
. �?VQRHEAD POWER +_ _ - + + + +
R/,ate On �oG � X� \ � � \ \ \ \ 'R�'" � \ �� � \ �\ - - _ - _ - \ + + + + + +
q , �/ O D.B. 2488, PG. 136 \ , \ \ \ \ \ \� _ Mao - - -
/JU,941C R \ \ \ =EX. POWER POLE My° _ \ \ + + + + + + 1 /I
\ �'\�� \ EX. FENCE \ \ � \ \c \ \ \ + + I I
oe
\ OW \ / \\ _ \ \ \ 140
\ I
EX. SS (UNDER REVIEW
WITH WILDCAT BRANCH 4\ \ R \
\ \ \ \\ IMPROVEMENTS)
EX. GREENWAY EASEMENT
B.M. 1974, PG. 115
UTILITY LEGEND
}
FIRE HYDRANT ASSEMBLY
FIRE DEPARTMENT CONNECTION (FDC)
13
WATER METER
H
WATER VALVE
POST INDICATOR VALVE
N
®
VALVE IN MANHOLE
❑
METER & VAULT
©
BACKFLOW PREVENTER
REDUCER
'-'
PLUG
o-►+—
BLOW -OFF ASSEMBLY
•
SANITARY SEWER MANHOLE
SEWER CLEAN -OUT
m
GREASE TRAP
SEWER FLOW DIRECTION
/
ARROW
YARD LIGHTS
LIGHT POLE
POWER POLE
LINE BREAK SYMBOL
WATERLINE
WATER SERVICE LINE
----------------=
UTILITY SLEEVE
SANITARY SEWER
SEWER SERVICE LINE
FM FM
SEWER FORCE MAIN
—GGGG
GAS LINE
OU OU
OVERHEAD UTILITY
UE UE
UNDERGROUND ELECTRIC
—TTTT
TELEPHONE
— —
EASEMENT LINE
z
GRAPHIC SCALE
0 20 40 80
1 inch = 40 ft.
ALL CONSTRUCTION SHALL BE IN ACCORDANCE
WITH THE CURRENT CITY OF RALEIGH
ENGINEERING DESIGN AND CONSTRUCTION
STANDARDS
PRELIMINARY DRAWING - NOT RELEASED FOR CONSTRUCTION
'J
McADAMS
The John R. McAdams Company, Inc.
One Glenwood Avenue
Suite 201
Raleigh, NC 27603
phone [phone]
fax [phone]
license number: C-0293, C-187
www.mcadamsco.com
CLIENT
MAPLE MULTI -FAMILY LAND SE, L.P.
160 MINE LAKE CT, SUITE 200
RALEIGH, NC 27615
PHONE: [phone]
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IVC IN
REVISIONS
NO. DATE
1 06. 01. 2022 REVISED PER CDR 1ST REVIEW COMMENTS
2 06.24.2022 50% CONSTRUCTION DRAWING SET
PLAN INFORMATION
PROJECT NO. 2021110380
FILENAME 2021110380-ASR-U1
CHECKED BY DCT
DRAWN BY TEA
SCALE 1"=40'
DATE 01. 14. 2022
SHEET
UTILITY PLAN
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