22007_South Tryon Commercial VIMS Installation Completion Rpt 20201216

Via Email
December 16, 2020
NCDEQ – Division of Waste Management
Brownfields Program
1646 Mail Service Center Raleigh, NC 27699-1646
Attn: Ms. Jordan Thompson
Re: VIMS Installation Completion Report S. Tryon CommercialS. Tryon Street & W. Tremont Avenue
Charlotte, North Carolina
Brownfields Project No. 22007-18-060H&H Project No. RMR-006
Dear Jordan:
On behalf of RRPV South Tryon Charlotte LP, please find the Vapor Intrusion Mitigation System (VIMS) Installation Completion Report prepared for the S. Tryon Commercial redevelopment (Brownfields Project No. 22007-18-060) located in Charlotte, Mecklenburg County. The
VIMS Installation Completion Report has been revised to address your comments provided on
December 7, 2020. Should you have any questions or need additional information, please do not hesitate to contact us at [phone].
Sincerely,
Hart & Hickman, PC
Christie Zawtocki, PE Alexis McKenzie, EI Principal Engineer Project Engineer
Enclosure
cc: Mr. Ashley Saulpaugh, Ram Real Estate Advisors (Via Email) Ms. Rachel Russell Krenz, Ram Real Estate Advisors (Via Email) Ms. Amanda Short, McGuire Woods (Via Email)
Mr. Kevin Slaughter, NCDEQ (Via Email)
i
s:\aaa-master projects\ram realty - rmr\rmr-006 tryon & tremont brownfields assistance\vimp\construction completion report\22007 - vims installation completion report.docx
VIMS Installation Completion Report S. Tryon Commercial
S. Tryon Street & W. Tremont Avenue Charlotte, North Carolina H&H Job No. RMR-006
Table of Contents
1.0 Introduction ..............................................................................................................................1
2.0 Vapor Intrusion Mitigation System Installation ..................................................................3
2.1 VIMS Installation ..................................................................................................................3
2.2 Continuing Tenant Upfit Activities .......................................................................................5
3.0 Summary and Conclusions.....................................................................................................6
List of Figures

Figure 1 Site Location Map
Figure 2 Site Map

List of Appendices
Appendix A Historical Data Summary Tables and Sample Location Map
Appendix B Product Specifications
Appendix C VIMS As-Built Drawings
Appendix D DEQ Email Correspondence
Appendix E VIMS Installation Photographs

1
s:\aaa-master projects\ram realty - rmr\rmr-006 tryon & tremont brownfields assistance\vimp\construction completion report\22007 - vims installation completion report.docx
VIMS Installation Completion Report S. Tryon Commercial
S. Tryon Street & W. Tremont Avenue Charlotte, North Carolina H&H Job No. RMR-006
1.0 Introduction

On behalf of RRPV South Tryon Charlotte LP (the Prospective Developer or PD), Hart &
Hickman, PC (H&H) has prepared this report to document vapor intrusion mitigation system
(VIMS) installation activities completed for Buildings A/B and Building C of the S. Tryon
Commercial development (Brownfields Project No. 22007-18-060) located northeast of the
intersection of S. Tryon Street and W. Tremont Avenue in Charlotte, Mecklenburg County, North
Carolina (Site or subject Site).

The Site consists of one approximately 2.39-acre parcel (Mecklenburg Parcel ID No. 12103302)
of land located in South End Charlotte. Redevelopment included construction of two multi-tenant
commercial buildings (Building A/B and Building C) with associated surface parking and
landscaped areas. A Site location map is provided as Figure 1, and the Site and surrounding area
are shown in Figure 2. To address potential environmental concerns associated historical
operations at the Site and on nearby off-Site properties, a Brownfields Agreement between the
North Carolina Department of Environmental Quality (DEQ) and the PD was recorded for the Site
on April 26, 2019.

As reported in the Summary of Previous Groundwater Assessment Activities dated November 19,
2018, and the Brownfields Assessment Report dated July 9, 2018, groundwater and soil gas
assessment activities completed at the Site did not identify unacceptable potential vapor intrusion
risks for non-residential uses. However, during a conference call on March 15, 2019 with the PD,
counsel for the PD, and H&H, the DEQ Brownfields Program requested pre-redevelopment
vertical soil gas profile assessment activities to confirm there were no risks of structural vapor
intrusion into the commercial buildings proposed for the Site. H&H completed the DEQ-requested
additional soil gas assessment activities in April 2019 and documented the sampling results in a
Vertical Soil Gas Profile Assessment Report dated May 15, 2019. Results of the vertical soil gas
2
s:\aaa-master projects\ram realty - rmr\rmr-006 tryon & tremont brownfields assistance\vimp\construction completion report\22007 - vims installation completion report.docx
assessment activities confirmed that non-residential cumulative risks are below acceptable
thresholds. Tabular summaries of historical groundwater and soil gas data and a sample location
map are included in Appendix A.

Although hypothetical “worst-case” cumulative risk calculations based on the groundwater and
soil gas sample results did not indicate a significant risk for potential structural vapor intrusion
into the proposed commercial buildings, out of an abundance of caution, the PD elected to
proactively install passive sub-slab vapor mitigation measures during construction of both Site
buildings. Therefore, H&H prepared a Vapor Intrusion Mitigation Plan (VIMP) dated June 12,
2019, for installation of VIMS during construction of the commercial buildings at the Site. The
VIMP was prepared in general accordance with the DEQ DWM Vapor Intrusion Guidance (VI
Guidance) dated March 2018 and the DEQ Brownfields Program Preliminary Vapor Intrusion
Mitigation System Design Submittal New Construction Minimum Requirements Checklist included
as Appendix H of the VI Guidance document. The VIMP received DEQ approval in a letter dated
June 28, 2019.

This report has been prepared to document successful installation of the VIMS during construction
of Site Buildings A/B and C. A discussion of VIMS installation activities is included in Section
2.0, and summary and conclusions are provided in Section 3.0.

3
s:\aaa-master projects\ram realty - rmr\rmr-006 tryon & tremont brownfields assistance\vimp\construction completion report\22007 - vims installation completion report.docx
2.0 Vapor Intrusion Mitigation System Installation

The VIMS was installed beneath the slabs during construction of both Buildings A/B and
Building C. The commercial building identified as Building A/B was constructed as a one-story
structure in the southern portion of the Brownfields property along W. Tremont Avenue. The
commercial building identified as Building C was constructed as a three-story structure in the
northern portion of the Site along S. Tryon Street. The building locations are shown on Figure 2.

The ground floor for Building A/B is approximately 17,400 square feet in area, and the ground
floor for Building C is approximately 14,600 square feet in area. Each building consists of a
concrete slab-on-grade foundation with load bearing columns. To allow for future tenant upfit and
utility installation, portions of the concrete slabs within each building have not yet been poured.
At the time of this report, the concrete slab had been poured in only one tenant space in Building
A/B.

2.1 VIMS Installation

The VIMS for buildings A/B and Building C included installation of Vaporblock® Plus 20
(VBP20) vapor barrier manufactured by Raven Industries (Raven) above a layer of high
permeability stone (clean #57 stone). VBP20 is an ASTM-certified 20-mil, multi-layer,
chemically-resistant vapor barrier, designed to prevent the migration of VOCs. The vapor barrier
was installed and sealed per manufacturer installation instructions to cover the entire area for
ground-level components of each building. A copy of the VBP20 manufacturer instructions is
included as Appendix B.

During installation of the VIMS, H&H conducted inspections at various phases of construction to
confirm the VIMS was installed in accordance with the VIMP. The exterior edges of the VBP20
were laid underneath the footings or attached and sealed to existing concrete utilizing VaporSeal™
tape or Butyl Seal™ double sided-tape. Seams within the footprints of each building have a
minimum 12-inch overlap and were sealed with VaporSeal™ tape. Small puncture holes observed
during inspections were sealed with VaporSeal™ tape or Pour-N-Seal™, and larger holes, tears,
4
s:\aaa-master projects\ram realty - rmr\rmr-006 tryon & tremont brownfields assistance\vimp\construction completion report\22007 - vims installation completion report.docx
or damaged areas observed during inspections were repaired using a patch that overlaps the
damaged area that was then taped along the seams. In areas where utility penetrations (i.e., piping,
ducts, etc.) are present and the use of taping was not practical or deemed as ineffective by the
design engineer, the Pour-N-Seal™ method (Appendix B) was used to form an airtight seal around
the penetrations.

As shown on the details included in VM-2 in Appendix C, the vapor barrier connection along the
exterior slab of Building C was modified with approval from the design engineer. The exterior
building footings of Building C were poured without vapor barrier under the concrete; therefore,
the vapor barrier was sealed above the footer and concrete masonry unit (CMU) wall. To provide
similar coverage as the original proposed detail, the vapor barrier in Building C was installed
vertically between the exterior wall and the CMU wall and sealed between the CMU wall and the
concrete slab. DEQ was notified by H&H of this change in an email correspondence dated July
1, 2019, and DEQ acknowledged the change in an email dated July 26, 2019. The email
correspondence has been included as Appendix D.

The ground floor of each building was initially constructed without the concrete slab to allow for
future tenant upfit activities and utility installation. At the exterior walls, ribbon slabs were poured
to support the exterior building finish. H&H inspected the vapor barrier within each unfinished
tenant space. Immediately after inspection, the tenant spaces were locked and secured to prevent
access of unauthorized personnel.

H&H performed inspections during upfit of the eastern tenant space of Building A/B. Following
utility installation and upfit activities, H&H inspected the repaired vapor barrier prior to pouring
concrete to complete the slab in the eastern tenant space of Building A/B. The other tenant spaces
remain unfinished and will be inspected in the future following completion of sub-slab utility
installations that disturb the vapor barrier and prior to pouring concrete slabs.

Based upon inspections completed during the VIMS installation activities, the VIMS was installed
in general accordance with the VIMP. VIMS as-built drawings depicting the vapor barrier extents,
5
s:\aaa-master projects\ram realty - rmr\rmr-006 tryon & tremont brownfields assistance\vimp\construction completion report\22007 - vims installation completion report.docx
details, and specifications are included in Appendix C. A photographic log of the VIMS
installation activities is provided in Appendix E.

2.2 Continuing Tenant Upfit Activities

Future tenant upfit and sub-slab utility installations will require removal or penetration of the vapor
barrier. Following removal of the vapor barrier and completion of upfit and sub-slab utility
installation activities, a qualified contractor will repair and restore the vapor barrier in accordance
with the VIMP. Restoration and repair to the vapor barrier shall be performed per the manufacturer
specifications provided in Appendix B. In addition, restoration and repairs to VIMS components
will be completed utilizing products and materials outlined in the DEQ-approved VIMP unless
other similar product is pre-approved by a NC licensed Engineer.

Following VIMS restoration and repair activities and prior to placement of the concrete slab in a
tenant pour-back space, the vapor barrier will be visually inspected by a NC licensed Engineer or
designee. The concrete slab will not be poured in a tenant space until VIMS components have
been repaired and restored to the satisfaction of a NC licensed Engineer. Documentation of system
repairs and inspections will be provided to DEQ as an addendum to the VIMS Installation
Completion Report at the completion of tenant upfit activities.

6
s:\aaa-master projects\ram realty - rmr\rmr-006 tryon & tremont brownfields assistance\vimp\construction completion report\22007 - vims installation completion report.docx
3.0 Summary and Conclusions

Construction of commercial Building A/B and Building C have been completed for the S. Tryon
Commercial property (Brownfields Project No. 22007-18-060) located in Charlotte, Mecklenburg
County. Results of previous vapor intrusion assessment activities completed at the Site prior to
redevelopment did not identify risks of potential structural vapor intrusion above acceptable levels.
Although a VIMS was not necessary, the PD elected to pro-actively install a VIMS during
construction of both Buildings A/B and Building C as a precautionary measure.

H&H conducted VIMS installation inspections during construction of the new Site buildings to
confirm the system was installed per the manufacturer installation instructions and the
DEQ-approved VIMP. A brief summary of the VIMS installation activities is provided below.

VIMS installation has been completed for Buildings A/B and C of the S. Tryon Commercial
Brownfields property and consists of a vapor barrier under the ground floor slab. During
installation of the VIMS, H&H personnel, under direction of a North Carolina licensed
Professional Engineer, conducted inspections during initial installation of the vapor barrier and
during the subsequent upfit of one tenant space. Results of the installation inspections indicate
that the VIMS was successfully installed in accordance with the DEQ-approved VIMP.

As noted in Section 2.2, during future tenant upfit activities, the vapor barrier will be visually
inspected by a NC licensed Engineer or designee, following VIMS restoration and repair activities
and prior to placement of the concrete slab. An installation inspection summary will be completed
to document upfit activities for each tenant space, stamped by a NC licensed engineer, and
submitted as addendum(s) to this report.

Figures

TITLE
PROJECT
SITE LOCATION MAP
SOUTH TRYON COMMERICAL
CHARLOTTE, NORTH CAROLINA
DATE:
JOB NO:
REVISION NO:
FIGURE:
5-3-19 0
1RMR-006
SITE
0 2000 4000
APPROXIMATE
SCALE IN FEET
N
U.S.G.S. QUADRANGLE MAP
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
CHARLOTTE EAST, NORTH CAROLINA, 1991
REVISION NO. 0
JOB NO. RMR-006
DATE: 11-16-20
FIGURE NO. 2
SOUTH TRYON COMMERCIALCHARLOTTE, NORTH CAROLINA
SITE MAP
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
FORMER BUILDING FOOTPRINT
COMPLETED BUILDING FOOTPRINT
COMPLETED PARKING/ PLAZA AREA
APPROXIMATE LOCATION OF FORMER
GASOLINE UNDERGROUND STORAGE TANK
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
MOTOR FREIGH
T

S
T
A
T
I
O
N
(1950-1950)
S. TR
Y
O
N
S
T
R
E
E
T
FORMER B&B CONTRACTINGCOMPANY
W. TREMONT

A
V
E
N
U
E
DO
G
G
E
T
T

S
T
R
E
E
T
NOTES:
1.AERIAL IMAGERY OBTAINED FROM MECKLENBURG COUNTYGIS (2017).
FORMER RESTAURANT
(1949-1959)
FORMER B&BCONTRACTING COMPANY
FORMER TERMINIX, INC.
(1969-2014)
FORMER AUTO REPAIR SHOP(1950-1963)
APPROXIMATE LOCATION
FORMER UST DISPENSER
FORMER FARM MACHINERY
SALES & SERVICE (1959-1963)
ELECTRICAL SUPPLY
WAREHOUSE BUILDING C(1960-1990)
BUILDING AB
BUILDING C
WEST TREMONT(BPN 14006-10-060)
TREMONT REDEVELOPMENT(BPN 18004-14-060)
2100 S. TRYON STREET(BPN 22054-18-060)
HUGH SUPPLY PROPERTY(BPN 10049-06-060)

Appendix A
Historical Data Summary Tables and Sample Location Maps

Appendix A - Table 1Summary of 2007 Groundwater Analytical DataS. Tryon CommercialCharlotte, North CarolinaH&H Job No. RMR-006 Sample IDDPT-8DPT-9MW-3 Sample Date7/23/2007 7/24/20078/9/2007 UnitsVOCs (8260B)Acetone16<10 <106,000 4,500,000 19,000,000Chloroform<1.03.22.6708.1361,1-Dichloroethene2.5<1.0<1.035039160Tetrachloroethene<1.0<1.01.60.701248Trichloroethene 2.514113.01.04.4OCPs (8081)Aldrin0.63<0.050 <0.0500.002 *3.2 14Dieldrin0.75 0.15<0.0500.002-- --Endrin Aldehyde 0.32<0.050 <0.050NE-- --RCRA Metals (6010B/7470A)UnfilteredFilteredArsenic<10 <10 NA NA NA10-- --Barium 35 26NA NA NA700-- --Cadmium<1.0 <1.0 NA NA NA2.0-- --Chromium (total)<5.0 <5.0 NA NA NA10-- --Lead<5.0 <5.0 NA NA NA15-- --Mercury <0.20 <0.20 NA NA NA1.0-- --Selenium30 33NA NA NA20-- --Silver<5.0 <5.0 NA NA NA20-- --Notes:1) North Carolina Department of Environmental Quality (DEQ) Title 15A NCAC 02L. 0202 Groundwater Quality Standard (April 2013)* DEQ Title 15A NCAC 02L. 0202 Appendix I Interim Maximum Allowable Concentration (April 2018) is used for screening2) DEQ Division of Waste Management (DWM) Vapor Intrusion Groundwater Screening Levels (GWSLs) (February 2018)Bold indicates an exceedance of the Groundwater Standard.Underline indicates an exceedance of the Residential Vapor Intrusion GWSL.Highlight indicates an exceedance of the Non-Residential Vapor Intrusion GWSL.With the exception of metals, only compounds detected in at least one sample are shown.Concentrations are reported in micrograms per liter (µg/L).Laboratory analytical methods are shown in parentheses.Compound concentrations are reported to laboratory reporting limits.VOCs = volatile organic compounds; OCPs = Organochlorine Pesticides; RCRA = Resource Conservation and Recovery ActNA = Not Analyzed; NE = Not Established; -- = Not ApplicableNon-Residential GWSLs25.720NANANAGroundwater Standard(1)<1.0<1.0DPT-27/20/2007<10µg/LResidential GWSLs2S:\AAA-Master Projects\Ram Realty - RMR\RMR-006 Tryon & Tremont Brownfields Assistance\2007 Groundwater Sampling Report\Tables\GW tables11/15/2018Appendix A Table 1 (Page 1 of 1) Hart & Hickman, PC
Appendix A - Table 2Summary of Previous Soil Gas Analytical Data South Tryon CommercialCharlotte, North CarolinaBrownfields Project No. 22007-18-060H&H Job No. RMR-006Sample LocationSample IDVMP-1 VMP-2 VMP-4 VMP-5 VMP-6 VMP-7Sample Depth (ft bgs)9.5-10 9.5-10 9.5-10 9.5-10 9.5-10 9.5-10Sampling Date 05/18/18 05/18/18 05/18/18 05/18/18 05/18/18 05/18/18UnitsVOCs (TO-15)Acetone13 J 14 J 11 J 9.9 J 25<6.635 9.2 J 220,000 2,700,000Benzene8.7 21 30 31 36 61 77 5.4 120 1,6002-Butanone (Methyl Ethyl Ketone)1.3 J 1.6 J 1.6 J 1.4 J<0.441.5 J 1.8 J 1.3 J 35,000 440,000Carbon Disulfide5.9 J 12 17 16 32 71 82 3.0 J 4,900 61,000Carbon Tetrachloride<0.372.4 4.1 4.3<0.37 <0.37 <0.371.3 160 2,000Chloroform72 6928 2754 46 290 36041 530cis-1,2-Dichloroethene<0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32NE NECyclohexane<0.49 <0.49 <0.49 <0.49 <0.496.9 8.5<0.4942,000 530,0001,3-Dichlorobenzene25 24 17 15 25 28 31 26 NE NEDichlorodifluoromethane (Freon 12)3.2 L-05 2.8 3.4 L-05 2.9<0.433.0 3.8 L-05 2.8 700 8,8001,1-Dichloroethylene<0.31 <0.31<0.31 <0.31 <0.311.6<0.31 <0.311,400 7,700Ethanol<6.77.1 J<6.7 <6.7 <6.7 <6.7 <6.7 <6.7NENEEthylbenzene78 90 110 120 91 160 170 223704,9004-Ethyltoluene<0.6040 38 40 20 36 50 8.4NENEHeptane13 35 31 34 58 90 110 7.82,80035,000Hexane3.2 J 16 J 10 J 11 J 39 68 88 5.7 J4,90061,000Isopropanol0.99 J 3.9 J 1.2 J<0.60 <0.60 <0.60 <0.60 <0.601,40018,000Propene (Propylene)2.3 J<0.34 <0.34 <0.34 <0.3412 J 48<0.3421,000260,000Tetrachloroethene6.2 3.7 12 13 84 3.7 1.9<0.752803,500Toluene280 380 580 590 580 970 1,100 11035,000440,000trans-1,2-Dichloroethene<0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32NENETrichloroethene66 42 52 536.4708.0 6.114180Trichlorofluoromethane (Freon 11)3.2 J 2.2 J 6.2 5.2 2.2 J 2.9 J 4.2 J 2.2 JNENE1,2,4-Trimethylbenzene120 120 100 100 45 90 120 254205,3001,3,5-Trimethylbenzene28 26 20 20 11 19 26 6.54205,300Vinyl Acetate1.4 J 3.2 J<0.34 <0.34 <0.349.8 J 12 J 1.8 J1,40018,000Vinyl Chloride<0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32562,800m&p-Xylene300 320 410 420 320 550 640 847008,800o-Xylene96 110 140 140 94 160 190 257008,800Notes:1) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Residential Sub-slab and Exterior Soil Gas Screening Levels (SGSLs) (February 2018).2) North Carolina DEQ DWM Non-Residential SGSLs (February 2018).Bold indicates concentration exceeds DEQ Residential SGSLs (February 2018).Only compounds detected in at least one sample are shown.Compound concentrations reported in micrograms per cubic meter (µg/m3) and to the laboratory method detection limits.Analytical method is indicated in parentheses.J = Detected concentration is above the laboratory method detection limit, but below the laboratory reporting limit.L-05 = Laboratory fortified blank/laboratory control sample recovery is outside of control limits and is biased on the high side.ft bgs = feet below ground surface; NE = Not Establishedµg/m3µg/m3µg/m3Building ABBuilding CResidentialSGSL(1)Non-Residential SGSL(2)VMP-3 / DUPLICATE9.5-1005/18/18S:\AAA‐Master Projects\Ram Realty ‐ RMR\RMR‐006 Tryon & Tremont Brownfields Assistance\Vertical Soil Gas Profile Report\Tables\Table 1 South Tryon Commercial SV Table5/3/2019Appendix A - Table 2 (Page 1 of 1) Hart & Hickman, PC
Appendix A - Table 3Summary of Vertical Soil Gas Profile Analytical Data South Tryon CommercialCharlotte, North CarolinaBrownfields Project No. 22007-18-060H&H Job No. RMR-006Sample LocationSample IDSample Depth (ft bgs)5-5.5 15.5-16 5-5.5 15.5-16 5-5.5 14.5-15 5-5.5 14.5-15 5-5.5 14.5-15Sampling Date UnitsVOCs (TO-15)cis-1,2-Dichloroethene<0.34 <0.34 <0.37 <0.33 <0.35 <0.35 <0.35 <0.36 <0.36 <0.34NE NETetrachloroethene1.6 7.0 1.3 1.1 1.9 130<0.5111.9<0.512.7 280 3,500trans-1,2-Dichloroethene<0.44 <0.44 <0.48 <0.42 <0.46 <0.45 <0.46 <0.47 <0.47 <0.44NE NETrichloroethene15.2 85.06.215.4<0.4132.80.68 J1401.411414 180Vinyl Chloride<0.20 <0.20 <0.21 <0.19 <0.20 <0.20 <0.20 <0.21 <0.21 <0.2056 2,800Notes:1) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Residential Sub-slab and Exterior Soil Gas Screening Levels (SGSLs) (February 2018).2) North Carolina DEQ DWM Non-Residential SGSLs (February 2018).Bold indicates concentration exceeds DEQ Residential SGSLs (February 2018).Compound concentrations reported in micrograms per cubic meter (µg/m3) and to the laboratory method detection limits.Analytical method is indicated in parentheses.J = Detected concentration is above the laboratory method detection limit, but below the laboratory reporting limit.ft bgs = feet below ground surface; NE = Not Established04/18/19µg/m3µg/m3µg/m304/18/1904/18/1904/18/1904/18/19Building CBuilding ABResidential SGSL(1)Non-Residential SGSL(2)VMP-8VMP-9VMP-10VMP-11VMP-12S:\AAA‐Master Projects\Ram Realty ‐ RMR\RMR‐006 Tryon & Tremont Brownfields Assistance\Vertical Soil Gas Profile Report\Tables\Table 1 South Tryon Commercial SV Table5/3/2019Appendix A - Table 3 (Page 1 of 1) Hart & Hickman, PC
SB-2
SB-1
SB-3
VMP-3
VMP-2
VMP-1
SB-4
VMP-4
VMP-5
VMP-6
VMP-7
SB-5
SB-6
VMP-8
VMP-9
VMP-10
VMP-11
VMP-12
REVISION NO. 0
JOB NO. RMR-006
DATE: 5-23-19
FIGURE NO. 3
SOUTH TRYON COMMERCIAL
CHARLOTTE, NORTH CAROLINA
SAMPLE LOCATION MAP
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
FORMER BUILDING FOOTPRINT
PROPOSED BUILDING FOOTPRINT
PROPOSED PARKING/ PLAZA AREA
APPROXIMATE LOCATION OF FORMER
GASOLINE UNDERGROUND STORAGE TANK
SOIL BORING LOCATION
SOIL GAS SAMPLE LOCATION
MONITORING WELL LOCATION
TEMPORARY MONITORING WELL LOCATION
TEMPORARY MONITORING WELL/ SOIL
BORING LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
MOTOR FRE
I
G
H
T

S
T
A
T
I
O
N
(1950-1950)
S. TR
Y
O
N
S
T
R
E
E
T
FORMER B&B CONTRACTING
COMPANY
W. TREMON
T

A
V
E
N
U
E
DO
GG
E
T
T

S
TR
E
E
T
NOTES:
1.AERIAL IMAGERY OBTAINED FROM MECKLENBURG COUNTY
GIS (2017).
FORMER RESTAURANT
(1949-1959)
FORMER B&B
CONTRACTING COMPANY
FORMER TERMINIX, INC.
(1969-2014)
FORMER AUTO REPAIR SHOP
(1950-1963)
FORMER UST DISPENSER
FORMER FARM MACHINERY
SALES & SERVICE (1959-1963)
ELECTRICAL SUPPLY
WAREHOUSE BUILDING C
(1960-1990)
BUILDING AB
BUILDING C
DPT-02
MW-3
MW-2
DPT-09
DPT-08
DPT-07
S:\AAA-Master Projects\Ram Realty - RMR\RMR-006 Tryon & Tremont Brownfields Assistance\Figures\Figures060418.dwg, FIG 3 ALT (2), 5/23/2019 5:48:57 PM, erichardson

Appendix B
Product Specifications

PRODUCT PART #
VaporBlock® Plus™ 20 ................................................................ VBP20
UNDER-SLAB VAPOR / GAS BARRIER
Under-Slab Vapor/Gas Retarder
© 2018 RAVEN INDUSTRIES INC. All rights reserved.
VAPORBLOCK® PLUS™VBP20
PRODUCT DESCRIPTION
VaporBlock® Plus™ is a seven-layer co-extruded barrier
made using high quality virgin-grade polyethylene and
EVOH resins to provide unmatched impact strength as well
as superior resistance to gas and moisture transmission.
VaporBlock® Plus™ 20 is more than 100 times less permeable
than typical high-performance polyethylene vapor retarders
against Methane, Radon, and other harmful VOCs. Tested and
verified for unsurpassed protection against BTEX, HS, TCE, PCE,
methane, radon, other toxic chemicals and odors.
VaporBlock® Plus™ 20 multi-layer gas barrier is manufactured
with the latest EVOH barrier technology to mitigate hazardous
vapor intrusion from damaging indoor air quality, and the safety
and health of building occupants. VBP20 is one of the most
effective underslab gas barriers in the building industry today
far exceeding ASTM E-1745 (Plastic Water Vapor Retarders
Used in Contact with Soil or Granular Fill Under Concrete Slabs)
Class A, B and C requirements. Available in a 20 (Class A) mil
thicknesses designed to meet the most stringent requirements.
VaporBlock® Plus™ 20 is produced within the strict guidelines
of our ISO 9001 Certified Management System.
PRODUCT USE
VaporBlock® Plus™ 20 resists gas and moisture migration
into the building envelop when properly installed to provide
protection from toxic/harmful chemicals. It can be installed as
part of a passive or active control system extending across the
entire building including floors, walls and crawl spaces. When
installed as a passive system it is recommended to also include
a ventilated system with sump(s) that could be converted to an
active control system with properly designed ventilation fans.
VaporBlock® Plus™ 20 works to protect your flooring and
other moisture-sensitive furnishings in the building’s interior
from moisture and water vapor migration, greatly reducing
condensation, mold and degradation.
SIZE & PACKAGING
VaporBlock® Plus™ 20 is available in 10’ x 150’ rolls to
maximize coverage. All rolls are folded on heavy-duty cores
for ease in handling and installation. Other custom sizes
with factory welded seams are available based on minimum
volume requirements. Installation instructions and ASTM E-1745
classifications accompany each roll.
APPLICATIONS
Radon Barrier
Methane Barrier
VOC Barrier
Brownfields Barrier
Vapor Intrusion Barrier
Under-Slab Vapor Retarder
Foundation Wall Vapor Retarder
VaporBlock® Plus™ is a seven-layer co-extruded barrier made using high quality virgin-grade polyethylene and EVOH resins to provide unmatched impact strength as well as superior resistance to gas and moisture transmission.
VaporBlock® Plus™ Placement
All instructions on architectural or structural drawings should be reviewed and followed.
Detailed installation instructions accompany each roll of VaporBlock® Plus™ and can also be located at www.ravenefd.com.
ASTM E-1643 also provides general installation information for vapor retarders.
VAPORBLOCK® PLUS™ 20
PROPERTIES TEST METHOD IMPERIAL METRIC
AppeArAnce White/Gold
Thickness, nominAl 20 mil 0.51 mm
WeighT 102 lbs/MSF 498 g/m²
clAssificATion ASTM E 1745 CLASS A, B & C
³ Tensile sTrengTh
ASTM E 154Section 9(D-882)58 lbf 102 N
impAcT resisTAnce ASTM D 1709 2600 g
permeAnce (neW mATeriAl)
ASTM E 154Section 7ASTM E 96Procedure B
0.0098 Perms
grains/(ft²·hr·in·Hg)
0.0064 Perms
g/(24hr·m²·mm Hg)
permeAnce (AfTer condiTioning)
(sAme meAsuremenT As Above permeAnce)
ASTM E 154Section 8, E96Section 11, E96Section 12, E96Section 13, E96
0.00790.00790.00970.0113
0.00520.00520.00640.0074
WvTr ASTM E 96Procedure B 0.0040 grains/hr-ft²0.0028 gm/hr-m²
benzene permeAnce See Note ⁶1.13 x 10-¹⁰ m²/sec or 3.62 x 10-¹³ m/s
Toluene permeAnce See Note ⁶1.57 x 10-¹⁰ m²/sec or 1.46 x 10-¹³ m/s
eThylbenzene permeAnce See Note ⁶1.23 x 10-¹⁰ m²/sec or 3.34 x 10-¹⁴ m/s
m & p-Xylenes permeAnce See Note ⁶1.17 x 10-¹⁰ m²/sec or 3.81 x 10-¹⁴ m/s
o-Xylene permeAnce See Note ⁶1.10 x 10-¹⁰ m²/sec or 3.43 x 10-¹⁴ m/s
hydrogen sulfide See Note 9 1.92E-⁰⁹ m/s
TrichloroeThylene (Tce) See Note ⁶7.66 x 10-¹¹ m²/sec or 1.05 x 10-¹⁴ m/s
perchloroeThylene (pce)See Note ⁶7.22 x 10-¹¹ m²/sec or 1.04 x 10-¹⁴ m/s
rAdon diffusion coeffiecienT K124/02/95 < 1.1 x 10-13 m2/s
meThAne permeAnce ASTM D 1434 3.68E-¹² m/sGas Transmission Rate (GTR):0.32 mL/m²•day•atm
mAXimum sTATic use TemperATure 180° F 82° C
minimum sTATic use TemperATure - 70° F - 57° C
UNDER-SLAB VAPOR / GAS BARRIER
VAPORBLOCK® PLUS™VBP20
© 2018 RAVEN INDUSTRIES INC. All rights reserved.
Scan QR Code to download
current technical data sheets
via the Raven website.
Note: To the best of our knowledge, unless otherwise stated, these are typical property values and are intended as guides only, not as specification limits. Chemical resistance, odor transmission, longevity as well as other performance criteria is not implied or given and actual testing must be performed for applicability in specific applications and/or conditions. RAVEN INDUSTRIES MAKES NO WARRANTIES AS TO THE FITNESS FOR A SPECIFIC USE OR MERCHANTABILITY OF PRODUCTS REFERRED TO, no guarantee of satisfactory results from reliance upon contained information or recommendations and disclaims all liability for resulting loss or damage. Limited Warranty available at www.RavenEFD.com
061318 EFD 1125
RAVEN ENGINEERED FILMSP.O. Box 5107 Sioux Falls, SD 57117-5107Ph: [phone] • TF: [phone] [e-mail]
³ Tests are an average of machine and transverse directions.5 Raven Industries performs seam testing at 20” per minute.6 Aqueous Phase Film Permeance. Permeation of Volatile Organic Compounds through EVOH Thin Film Membranes and Coextruded LLDPE/EVOH/
LLDPE Geomembranes, McWatters and Rowe, Journal of Geotechnical and Geoenvironmental Engineering© ASCE/
September 2015. (Permeation is the Permeation Coefficient adjusted to actual film thickness - calculated at 1 kg/m³.)
The study used to determine PCE and TCE is titled: Evaluation of diffusion of PCE & TCE through high performance geomembranes by Di
Battista and Rowe, Queens University 8 Feb 2018.9 The study used to determine diffusion coefficients is titled: Hydrogen Sulfide (H₂S) Transport through Simulated Interim Covers with Conventional and Co-Extruded Ethylene-Vinyl Alcohol (EVOH) Geomembranes.
INSTALLATION GUIDELINES - With VaporSeal™ Tape
VaporSeal™
4” Tape
VaporSeal™ 4” Tape Optional Butyl Seal
2-Sided Tape
Gas Barrier Applications
Elements of a moisture/gas-resistant floor system. General illustration only.(Note: This example shows multiple options for waterstop placement.
VaporSeal™
4” Tape
VaporSeal™ 4” Tape Optional Butyl Seal
2-Sided Tape
Gas Barrier Applications
Fig. 2: VaporBlock® Plus™ Overlap Joint Sealing Methods
Fig. 1: VaporBlock® Plus™ Overlapping Roll-out Method
Please Note: Read these instructions thoroughly before installation to ensure proper use of VaporBlock® Plus™. ASTM E 1465, ASTM E 2121 and, ASTM E 1643 also provide valuable information regarding the installation of vapor / gas barriers. When installing this product, contractors shall conform to all applicable local, state and federal regulations and laws pertaining to residential and commercial building construction.
• When VaporBlock® Plus™ gas barrier is used as part of an active control system for radon or other gas, a ventilation system will be required.
• If designed as a passive system, it is recommended to install a ventilation system that could be converted to an active system if needed.
Materials List:VaporBlock® Plus™ Vapor / Gas BarrierVaporSeal™* 4” Seaming TapeVaporSeal™* 12” Seaming/Repair TapeButyl Seal 2-Sided TapeVaporBoot Plus Pipe Boots 12/Box (recommended)VaporBoot Tape (optional)POUR-N-SEAL™ (optional)1” Foam Weather Stripping (optional)Mako® Screed Supports (optional)
VAPORBLOCK® PLUS™ PLACEMENT
1.1. Level and tamp or roll granular base as specified. A base for a gas-reduction system may require a 4” to 6” gas permeable layer of clean coarse aggregate as specified by your architectural or structural drawings after installation of the recommended gas collection system. In this situation, a cushion layer consisting of a non-woven geotextile fabric placed directly under VaporBlock® Plus™ will help protect the barrier from damage due to possible sharp coarse aggregate.
1.2. Unroll VaporBlock® Plus™ running the longest dimension parallel with the direction of the pour and pull open all folds to full width. (Fig. 1)
1.3. Lap VaporBlock® Plus™ over the footings and seal with Raven Butyl Seal tape at the footing-wall connection. Prime concrete surfaces, when necessary, and assure they are dry and clean prior to applying Raven Butyl Seal Tape. Apply even and firm pressure with a rubber roller. Overlap joints a minimum of 6” and seal overlap with 4” VaporSeal™ Tape. When used as a gas barrier, overlap joints a minimum of 12” and seal in-between overlap with an optional 2-sided Raven Butyl Seal Tape. Then seal with 4” VaporSeal™ Tape centered on the overlap seam. (Fig. 2)
Page 1 of 4 Top original diagram and figure #1 were reprinted with permission by the Portland Cement Association.Reference: Kanare, Howard M., Concrete Floors and Moisture, EB119, Portland Cement Association, Skokie, Illinois, and National Ready Mixed Concrete Association, Silver Spring, Maryland, USA, 2008, 176 pages.
1.4. Seal around all plumbing, conduit, support columns or other penetrations that come through the VaporBlock® Plus™ membrane.
1.4a. Method 1: Pipes four inches or smaller can be sealed with Raven VaporBoot Plus preformed pipe boots. VaporBoot Plus preformed pipe boots are formed in steps for 1”, 2”, 3” and 4” PVC pipe or IPS size and are sold in units of 12 per box (Fig. 3 & 5).
Pipe boots may also be fabricated from excess VaporBlock® Plus™ membrane (Fig. 4 & 6) and sealed with VaporBoot Tape or VaporSeal™ Tape (sold separately).
1.4b. Method 2: To fabricate pipe boots from VaporBlock® Plus™ excess material (see Fig. 4 & 6 for A-F):
A) Cut a square large enough to overlap 12” in all directions.
B) Mark where to cut opening on the center of the square and cut four to eight slices about 3/8” less than the diameter of the pipe.
C) Force the square over the pipe leaving the tightly stretched cut area around the bottom of the pipe with approximately a 1/2” of the boot material running vertically up the pipe. (no more than a 1/2” of stretched boot material is recommended)
D) Once boot is positioned, seal the perimeter to the membrane by applying 2-sided Raven Butyl Seal Tape in between the two layers. Secure boot down firmly over the membrane taking care not to have any large folds or creases.
E) Use VaporBoot Tape or VaporSeal™ Tape to secure the boot to the
pipe.
VaporBoot Tape (option) – fold tape in half lengthwise, remove half of the release liner and wrap around the pipe allowing 1” extra for overlap sealing. Peel off the second half of the release liner and work the tape outward gradually forming a complete seal.
VaporSeal™ Tape (option) - Tape completely around pipe overlapping the VaporBlock® Plus™ square to create a tight seal against the pipe.
F) Complete the process by taping over the boot perimeter edge with VaporSeal™ Tape to create a monolithic membrane between the surface of the slab and gas/moisture sources below and at the slab perimeter. (Fig. 4 & 6)
Preformed Pipe Boot Square Material Pipe Boot
Fig. 3
SINGLE PENETRATION PIPE BOOT INSTALLATION
Fig. 5 Fig. 6
1. Cut a square of VaporBlock® Plus™ barrier to extend at least 12” from the pipe in all directions.
2. Cut four to eight slices about 3/8” less than the diameter of the pipe.
5. Use Raven VaporBoot or VaporSeal™ Tape and overlap 1” at the seam.
4. Tape over the boot perimeter edge with VaporSeal™ Tape.
1. Cut out one of the preformed boot steps (1” to 4”).
2. Tape the underside boot perimeter with 2-sided Butyl Seal Tape.
3. Force the boot over pipe and press tape firmly in place.
4. Use VaporSeal™ Tape
to secure boot to the pipe.
5. Tape around entire boot edge with VaporSeal™ Tape.
VaporBoot Flexible Tapeor VaporSeal™ 4” TapeVaporSeal™ 4” Tape
VaporBlock® Plus™Material
VaporSeal™ 4” Tape
Raven Butyl Seal2-Sided Tape Raven Butyl Seal2-Sided Tape
VaporBoot PlusPreformed Boot 12”(minimum)
3. Force over pipe and tape the underside boot perimeter to existing barrier with 2-sided Butyl Seal Tape.
Fig. 4
Page 2 of 4 Original figure #4 diagram is reprinted with permission by the Portland Cement Association.Reference: Kanare, Howard M., Concrete Floors and Moisture, EB119, Portland Cement Association, Skokie, Illinois, and National Ready Mixed Concrete Association, Silver Spring, Maryland, USA, 2008, 176 pages.Method 1
Method 2
VaporSeal™4” Tape VaporBoot PlusPerformed Boot
Raven Butyl Seal 2-sided Tape Raven Butyl Seal 2-sided Tape
1.5. Sealing side-by-side multiple penetrations (option 1);
A) Cut a patch large enough to overlap 12” in all directions (Fig. 7)
of penetrations.
B) Mark where to cut openings and cut four to eight slices about
3/8” less than the diameter of the penetration for each.
C) Force patch material over penetration to achieve a tight fit and
form a lip.
D) Once patch is positioned, seal the perimeter to the membrane
by applying 2-sided Raven Butyl Seal Tape in-between the two
layers. (Fig. 8)
E) After applying Raven Butyl Seal Tape between the patch and
membrane, tape around each of the penetrations and the patch
with VaporSeal™ 4” tape. (Fig. 9) For additional protection apply
POUR-N-SEAL™ or an acceptable polyurethane elastomeric
sealant around the penetrations. (Fig. 10)
Fig. 7 Fig. 8
Fig. 9 Fig. 10
MULTIPLE PENETRATION PIPE BOOT INSTALLATION
Fig. 6
Cut a patch large enough to overlap 12” in all directions and slide over penetrations (Make openings as tight as possible.)
Once the overlay patch is positioned, seal the perimeter to the membrane by applying 2-sided Raven Butyl Seal Tape in-between the two layers.
After applying Raven Butyl Seal Tapebetween the patch and membrane, tape around the perimeter of the penetration and the patch with VaporSeal™ 4” Tape.
For additional protection apply POUR-N-SEAL™ or an acceptable polyurethane elastomeric sealant around the penetrations.
VaporSeal™ 4” Tape VaporSeal™ 4” Tape
Page 3 of 4
Option 1
Raven Butyl Seal 2-sided Tape
1.6. POUR-N-SEAL™ method of sealing side-by-side multiple penetrations (option 2);
A) Install the vapor barrier as closely as possible to pipe penetrations to minimize the amount of POUR-N-SEAL™ necessary to seal around all penetrations.
B) Once barrier is in place, remove soil or other particles with a dry cloth or a fine broom to allow for improved adhesion to the POUR-N-SEAL™ liquid.
C) Create a dam around the penetration area approximately 2” away from the pipe or other vertical penetrations by removing the release liner from the back of a 1” weather stripping foam and adhere to the vapor barrier. Form a complete circle to contain the POUR-N-SEAL™ materials (Fig. 11).
D) Once mixed, pour contents around the pipe penetrations. If needed, a brush or a flat wooden stick can be used to direct the sealant completely around penetrations creating a complete seal (Fig. 12-13).
E) DO NOT leave excess POUR-N-SEAL™ in plastic container for longer than the time it takes to pour sealant.
Fig. 12 Fig. 13
Fig. 11
Option 2
VAPORBLOCK® PLUS™ REPAIR INSTRUCTIONS
1.7. Proper installation requires all holes and openings are repaired prior
to placing concrete. When patching small holes, simply cut a 12” long
piece of 12” wide VaporSeal™ tape. Remove release liner and center
over the opening. Apply pressure to create a seal (Fig. 14-15).
1.8. When installing VaporBlock® Plus™ around pipe penetrations,
vertical columns, electrical ducts and other obstructions, you will
find it necessary to cut it to the nearest outside edge. This cut can
be easily sealed with 12” wide VaporSeal™ tape, by simply centering
it over the cut, 6” on either side. Once the tape is placed correctly,
apply pressure to assure a complete seal (Fig. 16).
Reminder Note: All holes or penetrations through the membrane will need
to be patched with 12” VaporSeal™ Tape.
Fig. 14
Page 4 of 5
Fig. 15
2.1. When installing reinforcing steel and utilities, in addition to the
placement of concrete, take precaution to protect VaporBlock®
Plus™. Carelessness during installation can damage the most
puncture–resistant membrane. Sheets of plywood cushioned with
geotextile fabric temporarily placed on VaporBlock® Plus™ provide
for additional protection in high traffic areas including concrete
buggies.
2.2. Use only brick-type or chair-type reinforcing bar supports to protect
VaporBlock® Plus™ from puncture.
2.3. Avoid driving stakes through VaporBlock® Plus™. If this cannot be
avoided, each individual hole must be repaired per section 1.7.
2.4. To avoid penetrating VaporBlock® Plus™ when installing screed
supports, utilize non-penetrating support, such as the Mako®
Screed Support System (Fig. 17). Avoid driving stakes through
VaporBlock® Plus™. If this cannot be avoided, each individual hole
must be repaired per figures 14-15.
2.5. If a cushion or blotter layer is required in the design between
VaporBlock® Plus™ and the slab, additional care should be given if
sharp crushed rock is used. Washed rock will provide less chance of
damage during placement. Care must be taken to protect blotter layer
from precipitation before concrete is placed.
VaporBlock® Plus™ Gas & Moisture Barrier can be identified on site
as gold/white in color printed in black ink with following logo and
classification listing (Fig. 18)
Page 5 of 5
VaporBlock® Plus™
Gas & Moisture Barrier
Note: To the best of our knowledge, unless otherwise stated, these are typical property values and are intended as guides only, not as specification limits. Chemical resistance, odor transmission, longevity as well as other performance criteria is not implied or given and actual testing must be performed for applicability in specific applications and/or conditions. RAVEN INDUSTRIES MAKES NO WARRANTIES AS TO THE FITNESS FOR A SPECIFIC USE OR MERCHANTABILITY OF PRODUCTS REFERRED TO, no guarantee of satisfactory results from reliance upon contained information or recommendations and disclaims all liability for resulting loss or damage. Limited Warranty available at wwww.RavenEFD.com
ENGINEERED FILMSP.O. Box 5107 Sioux Falls, SD 57117-5107Ph: [phone] • TF: [phone]
[e-mail]
020316 EFD 1127
VAPORBLOCK® PLUS™ PROTECTION
Fig. 16
Fig. 18
Fig. 17
* Patent Pending
© Raven 2016. All Rights Reserved.

Appendix C
VIMS As-Built Drawings
W1A
REVISION NO. 0
JOB NO. RMR-006
DATE: 12-16-20
FIGURE NO. VM-1
S. TRYON COMMERCIALS. TRYON STREET AND W. TREMONT AVENUE
CHARLOTTE, NORTH CAROLINA
VAPOR INTRUSION MITIGATION PLAN AS BUILTS
LEGEND
EXTENT OF VAPOR BARRIER - SEE SPECIFICATION 1ON SHEET VM-2
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
BUILDING A/B
BUILDING C
3A
1
1
3B
2
BUILDING LAYOUTS OBTAINED FROMSTRUCTURAL DRAWINGS PROVIDEDTO H&H BY WGPM, INC.
PROPOSEDPATIO
MIXED USE(3 STORY)
MIXED USE(1 STORY)MIXED USE(1 STORY)
VM2
VM2
VM2
VM2
VM2
PROFESSIONAL APPROVAL
REVISION NO. 0
JOB NO. RMR-006
DATE: 12-16-20
FIGURE NO. VM-2
S. TRYON COMMERCIALS. TRYON STREET AND W. TREMONT AVENUE
CHARLOTTE, NORTH CAROLINA
VAPOR INTRUSION MITIGATION PLAN
DETAILS AND SPECIFICATIONS AS BUILT
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VIMS VAPOR LINER AND BASE COURSE (TYP)1
BASE COARSE - CLEAN #57 STONEBENEATH VIMS VAPOR LINER
VAPOR LINER (SEE SPECIFICATION #1)
CONCRETE FLOOR SLAB
SUBBASE
NTS
SECTION THROUGH EXTERIOR WALL
NTS
EXTERNAL WALL (NOTPRESENT AT ALL LOCATIONS)
STUD WALL
BASE COARSE(SEE SPECIFICATION #1)
VAPOR LINER SEALED TO CONCRETE PERMANUFACTURER INSTRUCTIONS.
SUBBASE
3A
PLACE VAPOR LINER ALONGBOTTOM OF FOOTER
NTS
VAPOR BARRIER AT SLAB ELEVATION CHANGE2
STUD WALL BASE COARSE(SEE SPECIFICATION #1)
CMU WALL
VAPOR INTRUSION MITIGATION SYSTEM (VIMS) SPECIFICATIONS
1.VIMS VAPOR LINER IS VAPORBLOCK PLUS 20 VAPOR BARRIER MANUFACTURED BY RAVEN INDUSTRIES VAPORBLOCK PLUS 20
IS A POLYOLEFIN FILM DESIGNED TO PREVENT VAPOR MIGRATION THROUGH CONCRETE SLABS-ON-GRADE AND HAS THE
FOLLOWING CHARACTERISTICS:
·THICKNESS: 20-MIL MINIMUM
·PUNCTURE RESISTANCE: 2,200 GRAMS MINIMUM (PER ASTM D 1709)
·TENSILE STRENGTH: 45 lbf/in MINIMUM (PER ASTM D 882)
·PERMEANCE: 0.01 PERMS MAXIMUM (PER ASTM F 1249)
THE VAPOR LINER WAS INSTALLED AS SPECIFIED HEREIN AND PER MANUFACTURER INSTALLATION INSTRUCTIONS TO CREATE A
CONTINUOUS LINER BELOW GROUND FLOOR SLABS AND ALONG FOOTINGS AND COLUMNS. A BASE COURSE CONSISTING OF
CLEAN #57 WAS INSTALLED BENEATH THE VIMS VAPOR LINER.
2.THIS VAPOR MITIGATION PLAN AS BUILT IS INTENDED TO SHOW VIMS COMPONENT INSTALLATION ONLY AND IS NOT INTENDED
TO SHOW INSTALLATION OF STRUCTURAL, ARCHITECTURAL, MECHANICAL, AND PLUMBING COMPONENTS NOT RELATED TO THE
VIMS.
3. INSPECTIONS: INSPECTIONS OF THE VIMS WERE CONDUCTED BY THE ENGINEER, OR ENGINEER'S DESIGNEE, TO CONFIRM
VIMS COMPONENTS WERE INSTALLED PER THE APPROVED DESIGN. THE REQUIRED INSPECTIONS WERE: (1) INSPECTION OF
VAPOR LINER PRIOR TO POURING CONCRETE.
4.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS USED "LOW OR NO VOC" PRODUCTS AND MATERIALS, WHEN
POSSIBLE.
5.ALL PENETRATIONS WERE SEALED ACCORDING TO VAPOR LINER MANUFACTURER INSTALLATION INSTRUCTIONS AS FOUND
IN THE MANUFACTURER INSTALLATION GUIDELINES. SMALL PUNCTURE HOLES WERE SEALED WITH THE VAPORSEALÔ TAPE OR
POUR-N-SEALÔ AND LARGER HOLES, TEARS, OR DAMAGE WERE REPAIRED USING A PATCH THAT OVERLAPS THE DAMAGED
AREA AND THEN TAPED ALONG THE SEAMS. IN AREAS WHERE UTILITY PENETRATIONS (I.E. PIPING, DUCTS, ETC) ARE PRESENT
AND THE USE OF TAPING WAS NOT PRACTICAL OR DEEMED AS "INEFFECTIVE" BY THE DESIGN ENGINEER, POUR-N-SEALÔ WAS
POURED INTO FORM TO PATCH THE PENETRATION WITH AN AIRTIGHT SEAL.
6. CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS AVOIDED THE USE OF TEMPORARY FORM BOARDS THAT
PENETRATE THE VAPOR LINER WHEN POSSIBLE. IN AREAS WHERE TEMPORARY FORM BOARDS WERE USED, THE SIZE AND
NUMBER OF PENETRATIONS THROUGH THE VAPOR LINER WAS LIMITED. IN ALL CASES, AS FORM BOARDS WERE REMOVED, THE
CONTRACTOR OR SUB-CONTRACTORS SEALED ALL PENETRATIONS IN ACCORDANCE WITH VAPOR LINER MANUFACTURER
INSTALLATION INSTRUCTIONS.VM2
VM2
VM2
SECTION THROUGH EXTERIOR WALL
NTS
EXTERNAL WALL (NOTPRESENT AT ALL LOCATIONS)
STUD WALL
BASE COARSE(SEE SPECIFICATION #1)
VAPOR LINER SEALED TO CONCRETE PERMANUFACTURER INSTRUCTIONS.
SUBBASE
3B
PLACE VAPOR LINER ALONGVERTICAL SIDES OF CMUWALL
VM2
CMU WALL
PROFESSIONAL APPROVAL

Appendix D
DEQ Email Correspondence

1
Harriger, Joselyn
From:Harriger, Joselyn
Sent:Friday, July 26, 2019 12:39 PM
To:Christie Zawtocki
Cc:Ralph McGee; [e-mail]; Schmithorst, William L
Subject:RE: [External] RE: South Tryon Commercial (22007)
Good afternoon Christie,  

I just received your email on Wednesday. I have some random email issues, so if you’ve ever not heard from me feel free 
to give me a call.  

I’m unclear why the contractor would have poured the footers without installing the vapor barriers as you had originally 
proposed. Regardless, that really leaves us with little choice but to acknowledge that your revised design and follow‐up 
comments have been received and noted. This should not be considered an “approval” but a notification to DEQ that 
site conditions had changed from the original plans. I have no objections to proceeding with the remainder of the 
installation.  

Please include your responses below and the as‐built in the final occupancy request letter report. As outlined in our 
compliance letter, DEQ Brownfields considers that by sealing the plan (and in this case the revised design sheet) and the 
subsequent installation report, the PE believes that the mitigation system will be effective at mitigating the potential for 
vapor intrusion at the property and protecting public health.   

Thanks,  

From: Ralph McGee [mailto:[e-mail]]  
Sent: Wednesday, July 24, 2019 10:45 AM 
To: Harriger, Joselyn <[e-mail]> 
Subject: Fwd: [External] RE: South Tryon Commercial (22007) 

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to 
[e-mail] 

Did you get this?

2
Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------
From: Christie Zawtocki <[e-mail]>
Date: 7/23/19 9:56 AM (GMT-05:00)
To: "Harriger, Joselyn" <[e-mail]>
Cc: Ralph McGee <[e-mail]>
Subject: FW: [External] RE: South Tryon Commercial (22007)

Joselyn,

I wanted to make sure that my last e-mail made it through to you, because we have not heard a response. Please
confirm that you received this and let me know if you have any further questions or comments.

Thanks,
Christie

From: Christie Zawtocki
Sent: Friday, July 12, 2019 11:39 AM
To: Harriger, Joselyn <[e-mail]>
Cc: Schmithorst, William L <[e-mail]>; [e-mail]; Ralph McGee
<[e-mail]>; Alexis McKenzie <[e-mail]>
Subject: FW: [External] RE: South Tryon Commercial (22007)

Joselyn,

I think the below response addresses your questions. Please let me know if you have any other questions or
need anything else.

From: Christie Zawtocki
Sent: Monday, July 01, 2019 2:31 PM
To: 'Harriger, Joselyn' <[e-mail]>
3
Cc: Schmithorst, William L <[e-mail]>; [e-mail]; Ralph McGee
<[e-mail]>; Alexis McKenzie <[e-mail]>
Subject: RE: [External] RE: South Tryon Commercial (22007)

Joselyn,

When we were on Site last week for a subcontractor meeting, H&H was informed that the footings for the
building exterior had been poured for Building C. We slightly modified the detail (see attached) based on
additional clarification from the contractor regarding the exterior building construction. The vapor barrier will
be installed the same as the original exterior wall detail shows, with the exception of the barrier below the footer
since it has already been poured.

The CMU wall will be filled with grout to reinforce the rebar that runs from the footing through the CMU for
structural purposes and sealed to the concrete footer with mortar. In order for the grout and mortar to seal to the
concrete properly, the liner cannot be installed between the CMU wall and the footing because the vapor barrier
would prevent the structural seal that is needed.

The vapor barrier will be sealed to the top of the footing, as it would at any other penetration. Per the
manufacturer’s installation instructions, this would include both VaporSeal tape and Pour-N-Seal to create a
seal at the meeting point of the top of the footing and the vapor barrier. The footing is approximately 1 foot
thick. There is an additional 8 inches of CMU wall/grout followed by 0.5-1.5 feet of concrete turn-down slab to
the final grade of the interior. The preferential pathway for the sub-slab vapor will be to the porous layer of
gravel below the slab and to the exterior of the building, not through the approximately 2-3 feet of concrete and
grout material of the exterior wall foundations.

Let me know if you have any questions or need any additional information.

Thanks,
Christie

From: Harriger, Joselyn <[e-mail]>
Sent: Monday, July 01, 2019 9:04 AM
To: Christie Zawtocki <[e-mail]>
Cc: Schmithorst, William L <[e-mail]>; [e-mail]; Ralph McGee
4
<[e-mail]>; Alexis McKenzie <[e-mail]>
Subject: RE: [External] RE: South Tryon Commercial (22007)

Hi Christie,
Is there a reason why this change needs to be made? Are footers already poured? Also, why can’t the liner be
installed below the CMU wall? It’s a significant difference from what was proposed originally, not having a
liner below the footer. Can you certify that the thickness of concrete (I can’t tell the depth since it likely varies
across the site and the detail is not to scale) would be sufficient to mitigate vapors? Just an observation, but
CMU block a is pretty porous material, and is the seal between the ribbon slab and slab sufficient to prevent
migration below the liner into the CMU? We’re not using a spray applied liner, so these are just my thoughts
and concerns. Please let me know. Thanks,

From: Christie Zawtocki [mailto:[e-mail]]
Sent: Monday, July 1, 2019 8:05 AM
To: Harriger, Joselyn <[e-mail]>
Cc: Schmithorst, William L <[e-mail]>; [e-mail]; Ralph McGee
<[e-mail]>; Alexis McKenzie <[e-mail]>
Subject: [External] RE: South Tryon Commercial (22007)

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
[e-mail]

Joselyn,
Thank you for providing this. We met with the contractor last week. For one of the buildings, we will have to
slightly modify the barrier installation design. Please see Section 3B on the attached. Let me know if you have
any concerns with this. Otherwise, we will proceed with this modification.
Thanks,
Christie

From: Harriger, Joselyn <[e-mail]>
Sent: Friday, June 28, 2019 4:50 PM
To: Christie Zawtocki <[e-mail]>
Cc: Schmithorst, William L <[e-mail]>; [e-mail]; Ralph McGee
<[e-mail]>; Alexis McKenzie <[e-mail]>
Subject: South Tryon Commercial (22007)
5

Good afternoon, Christie and all -

Please find attached the VIMP compliance letter for South Tryon Commercial’s passive vapor mitigation
system.

Please let me know if you have any questions. Thank you,

Appendix E
VIMS Installation Photographs

Photograph 2: General view of vapor barrier in Building C. RMR-0062923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 1: General view of vapor barrier in Building AB.
S. TRYON COMMERCIALS. TRYON STREET & W. TREMONT AVENUECHARLOTTE, NORTH CAROLINA
Photograph 4: Representative view of sealing the vapor barrier to existing concrete.
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 3: Representative view of the seals around penetrations in the vapor barrier system.RMR-006S. TRYON COMMERCIALS. TRYON STREET & W. TREMONT AVENUECHARLOTTE, NORTH CAROLINA
Photograph 6: Vapor barrier sealed at edges following tenant upfit.
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 5:Sealed vapor barrier penetrations following tenant upfit.RMR-006S. TRYON COMMERCIALS. TRYON STREET & W. TREMONT AVENUECHARLOTTE, NORTH CAROLINA