14032_Burlington Ind_Vapor Barrier Installation Documentation (12-3-14)-OCR

VAPOR INTRUSION BARRIER SYSTEM
INSTALLATION DOCUMENTATION REPORT
Circle at Ninth Street
749 Ninth Street
Durham, North Carolina
NC Brownfields ID 43032-10-32
S&ME Project No. 1054-10-288C

Prepared for:
Crescent Ninth Street Venture I, LLC
c/o Crescent Resources, LLC
227 West Trade Street, Suite 1000
Charlotte, North Carolina 28202

Prepared by:

S&ME, Inc.
3201 Spring Forest Road
Raleigh, North Carolina 27616

December 3, 2014

S&ME, INC. / 3201 Spring Forest Road / Raleigh, NC 27616 / p 919.872.2660 / f 919.876.3958 / www.smeinc.com

December 3, 2014

Crescent Ninth Street Venture I, LLC
North Carolina Division of Waste Management
Brownfields Program
1646 Mail Service Center
Raleigh, North Carolina 27699

Attention: Mr. Joe Ghiold via email: [e-mail]
Project Manager

Reference: Vapor Intrusion Barrier System Installation Documentation Report
Circle at Ninth Street
749 Ninth Street
Durham, North Carolina
NC Brownfields ID No. 14032-10-32
S&ME Project No. 1054-10-288C

Dear Mr. Ghiold:

On behalf of Crescent Ninth Street Venture I, LLC (Crescent), S&ME, Inc. is providing
the enclosed Vapor Intrusion Barrier System Installation Documentation Report for the
Circle at Ninth Street project. This report includes documentation of our observations of
the vapor intrusion barrier (VIB) system installation. The VIB system was installed to
meet the Land Use Restrictions of the Brownfield Agreement between Crescent and the
North Carolina Department of Environment and Natural Resources.

If you have any questions about the information included in our report, please do not
hesitate to call me at [phone].

Sincerely,
S&ME, Inc.

Samuel P. Watts, P.G.
Senior Project Manager
[e-mail]

cc: Mr. Jade Eastridge – Crescent Communities ([e-mail])
Ms. Ginger Ackiss – Crescent Communities ([e-mail])
Vapor Intrusion Barrier System Installation Documentation S&ME Project No. 1054-10-288C
Circle at Ninth Street, 749 Ninth Street, Durham, NC December 3, 2014
1
INTRODUCTION
On behalf of the project developer, Crescent Ninth Street Venture I, LLC (Crescent), S&ME,
Inc. (S&ME) is submitting this report documenting our observations of the installation of the
vapor intrusion barrier (VIB) system at Circle at Ninth Street. The Circle at Ninth Street is a four-story, ~300-unit apartment community with a courtyard, swimming pool and dog park. The
site of the proposed residential development is a ~5.5-acre area in the central portion of the larger
~14-acre parent property. The parent property was part of the former Burlington Industries
Erwin Mills textile plant and has known contamination. The VIB system was installed to meet
the Land Use Restrictions (LURs) of the Brownfield Agreement between Crescent and the North Carolina Department of Environment and Natural Resources (NCDENR). (Brownfield
Agreement dated December 1, 2011. Brownfields ID No. 14032-10-32.)

PROJECT INFORMATION
The VIB system was required to comply with Section 5.b. of the LURs included in the
Brownfields Agreement for the site which states: 5. No building may be constructed on the Brownfields Property until:

b. vapor mitigation measures approved in writing by DENR in advance are installed to the satisfaction of a professional engineer licensed in North Carolina, as evidence by said engineer’s seal, and photographs illustrating the installation and a brief narrative describing it are submitted to DENR and deemed satisfactory in writing by that agency.

The VIB system was integrated into the gravel base layer located on the soil subgrade beneath
the structures and was overlain by the concrete floor slab. The VIB system generally consists of: 0.010-inch slotted, 1-inch diameter Schedule 40 PVC pipe vapor vent network installed within
the stone base, covered by a 15-mil polyethylene VaporBlock 15 Underslab Vapor Barrier, with
VaporBond polyethylene tape used to seal around the vapor barrier penetrations and seam
overlaps. The construction materials and methods for the VIB system were specified in S&ME’s Vapor Barrier Design, dated February 29, 2012. S&ME’s Vapor Barrier Design was approved by the North Carolina Brownfields Program (NCBP) on March 2, 2012. A copy of the Vapor
Barrier Design is enclosed.
Vapor Intrusion Barrier System Installation Documentation S&ME Project No. 1054-10-288C
Circle at Ninth Street, 749 Ninth Street, Durham, NC December 3, 2014
2
INSTALLATION OBSERVATIONS
Installation Observation Dates

Upon notification by the general contractor, State Building Group, S&ME performed periodic site visits, during construction, to observe installation of the VIB system. Site visits were
conducted on the following dates:

 July 5, 2012
 July 9, 2012
 August 15, 2012
 August 23, 2012
 August 24, 2012
 August 29, 2012
 August 30, 2012
 September 5, 2012
 October 29, 2012
 November 1, 2012
 November 9, 2012
 November 11, 2012
 November 21, 2012
 December 5, 2012
 December 6, 2012
 January 10, 2012
 January 29, 2012
 February 20, 2013
 February 25, 2013
 March 7, 2013
 April 3, 2013
 April 14, 2013
 April 30, 2013
 May 23, 2013
 June 19, 2013
 June 20, 2013
 May 30, 2014
 June 18, 2014
 July 24, 2014
 October 2, 2014
 October 3, 2014

Ventilation System
Prior to the installation of the vapor barrier, S&ME personnel were on site to observe the
installation of the venting system. The venting system consists of a series of slotted PVC pipes
which run beneath the vapor barrier, extending up through the wall, and vent through the roof.
This system allows passive venting of sub-slab vapors and may be converted to an active system if warranted. The venting system is shown in Figure 1. Photographs of the site during the
installation of the venting system are in the photolog provided in Appendix II.

During a site visit by S&ME personnel on May 30, 2014 to observe the VIB system observed
that only eight of the ten proposed vent locations had been extended up through the walls toward the roof. After conferring with State Building Group, it was determined that two of the vents had
been covered during construction of the building fascia, and could not be extended to the roof.
S&ME reviewed the layout of the ventilation system and determined there were no isolated
portions of the ventilation from the reduction in vent pipes extending to the roof, and the system
will perform as designed. The ‘as-built’ locations of the of the ventilation pipes, as measured by S&ME referencing on-site building features, are depicted on Figure 1.

Vapor Barrier

Once the venting system was installed, S&ME performed periodic observations of the installation of the selected VIB, VaporBlock®15 produced by Raven Industries, Inc. The overlapped sheets of polyethylene sheeting; sheeting terminations on horizontal and vertical
surfaces and support column penetrations through the VaporBlock 15 sheeting were observed to
Vapor Intrusion Barrier System Installation Documentation S&ME Project No. 1054-10-288C
Circle at Ninth Street, 749 Ninth Street, Durham, NC December 3, 2014
3

be sealed with Vapor Bond tape. Plumbing and conduit penetrations through the sheeting were
sealed with the VaporBoot and VaporBond Tape to secure the boot to the pipe. The observations
are recorded in the attached field notes (Appendix III) and in the photolog (Appendix II).

Vapor Barrier Repairs
After installation of the VIB system beneath the concrete slab, changes to the plumbing
installation necessitated breaking up the concrete slab to relocate sub-slab plumbing in
approximately 20 units. The concrete demolition and plumbing relocation caused damage to the vapor barrier portion of the VIB system. On June 18, 2014, July 24, 2014, October 2, 2014 and October 3, 2014, S&ME personnel were on site to observe repairs to the vapor barrier.
Photographs of the repairs are provided in Appendix II.
CONCLUSION
S&ME performed periodic observations of installation of the VIB system at the Circle at Ninth
Street, on the dates listed in this report. We believe the VIB system, as described in S&ME’s February 29, 2012 Vapor Barrier Design, is what has been installed at the site by the general
contractor, State Building Group, with some modifications to account for site-specific
conditions.

LIST OF ATTACHMENTS:
Figure 1 – Site Map and Vapor Ventilation System
Vapor Barrier Design, March 2, 2012
Photographic Log
Vapor Intrusion Barrier Installation Observation Field Notes

ATTACHMENTS

PROJECT NUMBER:
DATE:F
I
G
U
R
E

N
O
.
SCALE:
DRAWN BY:
CHECKED BY:DRAWING NUMBER:
WWW.SMEINC.COM
3201 SPRING FOREST RD, RALEIGH, NC 27616
NC ENGINEER LICENSE #F-0176
1
BTR1054-10-288C
NOV 20141" = 100'
ERWIN SQUARE
DURHAM, NORTH CAROLINA
SITE PLAN AND VAPOR VENTILATION SYSTEM
B-2426
T:\Projects\2010\ENV\10-288C Erwin Square - Brownfields Soil & VI\CAD\B2426.dwg, FIG1, 12/3/2014 4:36:11 PM, 1:1

VAPOR BARRIER DESIGN
MARCH 2, 2012

VAPOR BARRIER DESIGN
REVISION 2
Circle at Ninth Street /
Former Burlington Industries Site
749 Ninth Street Durham, North Carolina S&ME Project No. 1054-10-288C

Prepared for:
Crescent Ninth Street Venture I, LLC
227 West Trade Street, Suite 1000
Charlotte, NC 28202

Prepared by:

S&ME, Inc.
3201 Spring Forest Road
Raleigh, North Carolina 27616

February 29, 2012
Vapor Intrusion Barrier Design – Revision 2 S&ME Project 1054-10-288C Circle at Ninth Street, Durham, North Carolina February 29, 2012
1
VAPOR INTRUSION BARRIER DESIGN - REVISION 2

Circle at Ninth Street / Former Burlington Industries Site
749 Ninth Street
Durham, North Carolina
S&ME Project 1054-10-288C

1 GENERAL
The vapor intrusion barrier system is to be integrated into the gravel base layer located on
the soil subgrade and will be overlain by the concrete floor slab. The system consists of:
0.010-inch slotted, 1-inch diameter Schedule 40 PVC pipe vapor vent network installed
within the stone base, covered by a 15-mil polyethylene VaporBlock 15 Underslab Vapor
Barrier, with VaporBond polyethylene tape used to seal around the vapor barrier penetrations and seam overlaps. Raven Industries VaporBlock Product Specifications and
Installation Guidelines are attached for reference.

1.1 Materials
PVC Pipe and Solvent Specifications All sizes of polyvinyl chloride (PVC) Schedule 40 pipe shall be manufactured in
strict accordance to the requirements of ASTM D-1785 for physical dimensions and
tolerances and shall also meet the requirements of ASTM D-2665 Standard
Specification for PVC plastic drain, waste and vent (DWV) pipe, and shall be dual marked as such. All PVC Schedule 40 pipe shall be manufactured from virgin Type I,
Grade I PVC compounds with a Cell Classification of 12454 per ASTM D-1784.
PVC Schedule 40 pipe shall be Iron Pipe Size (IPS) conforming to ASTM D 1785,
and PVC Schedule 40 fittings shall conform to ASTM D 2466, and shall consistently
meet or exceed the Quality Assurance test requirements of these standards with regard to material, workmanship, burst pressure, flattening, and extrusion quality.
Solvent cement joints shall be made in a two-step process with a primer manufactured
for thermoplastic piping systems and solvent cement conforming to ASTM D 2564

Vapor vent piping system shall be constructed with Schedule 40 PVC piping and fittings, or demonstrated equal, having the following minimum specifications:

1” SLOTTED PVC PIPE DIMENSIONAL DATA
Outer Diameter 1.315”
Minimum Wall Thickness 0.140”
Slot Width 0.010”
Slot Spacing 0.500”

1.5” PVC PIPE DIMENSIONAL DATA
Outer Diameter 1.900”
Average Inner Diameter 1.590”
Minimum Wall Thickness 0.145”
Nominal Weight 0.537 lbs/ft
Vapor Intrusion Barrier Design – Revision 2 S&ME Project 1054-10-288C Circle at Ninth Street, Durham, North Carolina February 29, 2012
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Referenced Standards:
ASTM D 1784 - Rigid Vinyl Compounds
ASTM D 1785 - PVC Plastic Pipe, Schedule 40 ASTM D 2466 - PVC Plastic Fittings, Schedule 40 ASTM D 2564 - Solvent Cements for PVC Pipe and Fittings
ASTM F 1668 - Procedures for Buried Plastic Pipe
NSF Standard 14 - Plastic Piping Components and Related Materials
NSF Standard 61 - Drinking Water System Components - Health Effects Note: Latest revision of each standard applies.
VaporBlock 15 Polyethylene Vapor Barrier Specifications
The polyethylene membrane shall be VaporBlock 15 Underslab Vapor Barrier,
manufactured by Raven Industries, Inc., Engineered Films Division, or a demonstrated and approved equal, meeting the following minimum specifications:
Standard and Criteria
ASTM E1745 Material Classification Class A
ASTM E96
Procedure B
Specification for Water Vapor Transmission Rate
(WVTR) 0.0054 grain/hr-ft2
ASTM D1709 Method B Puncture Resistance >4,000 g
ASTM E154
ASTM E96 Procedure B
Specification for Permeance 0.009 U.S. perms
Tensile Strength 88 lbs/in

ASTM References: E1745 - Standard Specification for Plastic Water Vapor Retarders Used in Contact
with Soil or Granular Fill under Concrete Slabs
E96 - Standard Test Methods for Water Vapor Transmission of Materials
D1709 - Impact Resistance of Plastic Film by Free-Falling Dart Method
E154 - Standard Test Methods for Water Vapor Retarders Used in Contact with Earth Under Concrete Slabs, on Walls, or as Ground Cover

VaporBond / VaporBoot Polyethylene Tape Specifications
The polyethylene tape with rubber adhesive shall be 4-inch wide VaporBond Tape, manufactured by Raven Industries, Inc., or a demonstrated and approved equal tape
that is compatible with the VaporBlock 15 Vapor Barrier, meeting the following
minimum specifications:

Standard and Criteria
ASTM D1000 Total Thickness 9 mils
PSTC-1 Adhesion to Steel 30 oz./in.
ASTM D833 Water Vapor Transmission Rate (WVTR) 0.18 U.S. perms
Vapor Intrusion Barrier Design – Revision 2 S&ME Project 1054-10-288C Circle at Ninth Street, Durham, North Carolina February 29, 2012
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Referenced Standards: ASTM D1000-10 - Standard Test Methods for Pressure-Sensitive Adhesive-Coated
Tapes Used for Electrical and Electronic Applications
PSTC-1 - Pressure Sensitive Tape Council, Peel Adhesion of Single Coated Pressure. Sensitive Tapes at 180° Angle
Pipe Boot Kit Specifications
The pipe boot kits used to seal around pipe penetrations shall be the VaporBoot
System, manufactured by Raven Industries, Inc., or a demonstrated and approved equal that is compatible with the VaporBlock 15 Vapor Barrier.
1.2 Submittals
A. Submit product data for each type of vapor intrusion barrier, including
manufacturer’s printed instructions for evaluating and preparing the substrate,
technical data, and tested physical and performance properties.
B. Project Data - Submit shop drawings showing extent of vapor intrusion barrier, including details for overlaps, flashing, penetrations, and other
termination conditions.
C. Samples – Submit representative samples of the following for approval:
1. Vapor intrusion barrier components. 2. Vapor vent piping, risers and fittings.
3. Polyethylene tape.

1.3 Quality Assurance
A. Installer Qualifications: Engage an experienced installer.
B. Field Sample: Apply vapor intrusion barrier system to a designated area to demonstrate application, detailing, thickness, texture, and standard of workmanship.
1. Notify engineer one week in advance of the dates and times field sample
installation will occur.
2. If engineer determines that field sample installation does not meet requirements, reinstall field sample installation until the field sample installation is approved.
C. Pre-Installation Conference: A pre-installation conference shall be held prior
to application of the vapor intrusion barrier system to assure proper site and
installation conditions, to include contractor, applicator, engineer, and other trades influenced by vapor intrusion barrier installation.
1.4 Project Conditions

A. All plumbing, electrical, mechanical and structural items to be under or passing through the vapor intrusion barrier system shall be positively secured in their proper positions and appropriately protected prior to membrane
application.
Vapor Intrusion Barrier Design – Revision 2 S&ME Project 1054-10-288C Circle at Ninth Street, Durham, North Carolina February 29, 2012
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B. Vapor intrusion barrier shall be installed before placement of fill material and
reinforcing steel. When not possible, all exposed reinforcing steel shall be
masked by general contractor prior to membrane application.
C. Stakes used to secure the concrete forms or reinforcing bars should not
penetrate the vapor intrusion barrier system after it has been installed. If stakes need to puncture the vapor intrusion barrier system, the necessary
repairs need to be made by the vapor barrier installer.

2. VAPOR INTRUSION BARRIER SYSTEM INSTALLATION

2.1 Vapor Vent Piping Installation

2.1.1 Subgrade Surface Preparation
Examine substrates, areas, and conditions upon which the vapor vent piping will
be installed, with installer present, for compliance with requirements. Do not
proceed with installation until unsatisfactory conditions have been corrected.
Verify substrate is prepared according to project requirements as follows:
Compacted earth under vapor vent gravel layer: Remove pieces of debris,
gravel and/or any other material that can potentially puncture the vapor vent
system.

The minimum 3-inch thick gravel substrate base layer for the vapor vent piping should also be free from material that can potentially puncture the vapor intrusion
barrier. Additional protection or cushion lift layers might be required if the earth
or gravel substrate contains jagged points and edges that could puncture one or
more of the system components. Use gravel that has no material larger than 1-
inch in diameter with rounded edges (similar to NCDOT 78M). The vapor vent piping will be installed within the 3-inch thick gravel layer. Mark the layout of
vapor vent piping per layout design developed by engineer. The gravel layer must
be compacted and rolled flat.

2.1.2 Vapor Vent Piping Network Installation
Install horizontal 0.010-inch slotted, 1-inch diameter Schedule 40 PVC piping
over substrate material with joints and fittings where designated on drawings and install in accordance with manufacturer’s recommendations. Sections of 0.010-
inch slotted, 1-inch diameter Schedule 40 PVC pipe may be joined with factory
threading or with slip fittings and solvent cemented joints.

Solvent cement joints shall be made in a two-step process with appropriate primer manufactured for thermoplastic piping systems and solvent cement conforming to
ASTM D 2564.

Vapor Intrusion Barrier Design – Revision 2 S&ME Project 1054-10-288C Circle at Ninth Street, Durham, North Carolina February 29, 2012
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When crossing 0.010” slotted, 1” Schedule 40 PVC piping under footings or
grade beams, consult with the specifying environmental engineer and structural
engineer for appropriate use and placement of solid pipe materials. Place solid
pipe over or through concrete surface and attach appropriate Schedule 40 PVC slip fittings at both ends of the pipe before connecting additional 0.010” slotted, 1” Schedule 40 PVC piping.

Place vapor vent risers per specifying engineer’s project specifications. Connect
0.010” slotted, 1” Schedule 40 PVC piping to 1 ½ inch diameter to 1 inch diameter Schedule 40 PVC slip reducer and attach with appropriate PVC primer and solvent. Use 1 ½ inch diameter to 1 inch diameter Schedule 40 PVC slip
reducers as shown on system drawings to convert from 0.010” slotted, 1”
Schedule 40 PVC piping to 1 ½ inch diameter Schedule 40 PVC piping risers.
The vapor vent riser line will be routed to the roof through utility chases to the roof area by others. All overlying and adjacent material shall be placed or installed using approved procedures and guidelines to prevent damage to the vapor vent piping system.
Equipment shall not be directly driven over, and stakes or any other materials may
not be driven through, the vapor vent piping system.

2.2 VaporBlock 15 Polyethylene Vapor Barrier Installation

2.2.1 Subgrade Surface Preparation
Examine substrates, areas, and conditions under which polyethylene sheeting will
be installed, with installer present, for compliance with requirements. Do not
proceed with installation until unsatisfactory conditions have been corrected. Verify substrate is prepared according to project requirements as follows:
The vapor vent gravel layer substrate should be in place and should be free
from material that can potentially puncture the vapor intrusion barrier.
Additional protection or cushion layers might be required if the earth or gravel substrate contains too many jagged points and edges that could puncture one or more of the system components. The gravel layer may be continued above
the vapor vent layer up to the finished grade level where the polyethylene
sheeting will be installed. If the gravel layer is continued, use gravel that has
no material larger than 1-inch diameter with rounded edges (similar to NCDOT 78M); the gravel layer must be compacted and rolled flat. If structural fill is installed from the gravel layer up to finished grade level where the
polyethylene sheeting will be installed, the structural compacted fill must
meet project specifications, be free of any debris or sharp edges, and be
completed with a smooth, compacted surface for application of the polyethylene sheeting.

Vapor Intrusion Barrier Design – Revision 2 S&ME Project 1054-10-288C Circle at Ninth Street, Durham, North Carolina February 29, 2012
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2.2.2 Polyethylene Sheeting Installation
A. Unroll the VaporBlock 15 with the longest dimension running parallel with
the direction of the slab pour, and pull open all folds to full width. Install the
polyethylene sheeting base layer over substrate material in one direction with
6” overlaps. B. Secure the polyethylene sheeting seams with 6” overlapped sheets that are sealed with Vapor Bond tape.
C. Visually verify there are no gaps in seams.

2.2.3 Polyethylene Sheeting Penetration Sealing
A. Terminations on horizontal and vertical surfaces should extend 6” onto the
termination surface. If job-specific conditions may prevent a 6” termination, contact the engineer. B. All pipe penetrations should be securely in place prior to the installation of the
polyethylene sheeting. Any loose penetrations should be secured prior to
polyethylene sheeting installation, as loose penetrations could potentially exert
pressure on the polyethylene sheeting and damage the polyethylene sheeting after installation. C. Seal around all plumbing, conduit, support columns or other penetrations that
come through the VaporBlock 15 membrane. The VaporBoot Pipe Boot
System is the recommended sealing method for individual round
penetrations. 1. Select appropriately-sized VaporBoot for pipe diameter. 2. Slide boot over the pipe until flush with grade.
3. Use VaporBoot Tape or VaporBond Tape to secure the boot to the
pipe. Apply pressure to tape to ensure adhesion.
4. Complete the process by taping over the seam at the boot perimeter edge with VaporBond Tape to create a sealed monolithic membrane between the surface of the slab and moisture sources
below and at the slab perimeter.
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 gradually outward to minimize folds and wrinkles and form a complete seal.
VaporBond Tape (option) - Tape completely around the pipe with
overlapping wraps while minimizing folds and wrinkles to get a tight seal
against the pipe. D. For grouped or non-conforming penetrations, pipe boots may also be fabricated from excess VaporBlock 15 membrane and sealed with VaporBoot
Tape or VaporBond Tape. All holes or penetrations through the membrane
will need a patch cut to a minimum of 6” from the opening in all directions.
To fabricate pipe boots from excess VaporBlock 15 material: 1. Cut a square large enough to overlap 6” in all directions.
2. 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.
Vapor Intrusion Barrier Design – Revision 2 S&ME Project 1054-10-288C Circle at Ninth Street, Durham, North Carolina February 29, 2012
7
3. 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) 4. Use VaporBoot Tape or VaporBond Tape to secure the boot to the pipe.
5. Complete the process by taping over the boot perimeter edge with
VaporBond Tape to create a monolithic membrane between the
surface of the slab and moisture sources below and at the slab perimeter. E. Holes or openings through VaporBlock are to be repaired by cutting a piece of
VaporBlock at least 6” larger in all directions from the opening. Seal the edges
of the patch with VaporBond Tape.
2.3 VaporBlock 15 Polyethylene Vapor Barrier Protection
A. When installing reinforcing steel and utilities, in addition to the placement of
concrete, take precaution to protect VaporBlock. Carelessness during installation
can damage the membrane. Sheets of plywood cushioned with geotextile fabric may be temporarily placed on VaporBlock membrane to provide additional protection in high traffic areas.
B. Use only brick-type or chair-type reinforcing bar supports to protect VaporBlock
from puncture.
C. Avoid driving stakes through VaporBlock membrane. If this cannot be avoided, each individual hole must be repaired.

3. QUALITY ASSURANCE

A. The vapor barrier system should be installed by a qualified installer.
B. The qualified installer is responsible for contacting the engineer at least 24-hours prior to application of the polyethylene sheeting.
C. Periodic visual inspections are recommended during the installation of the concrete
reinforcing system to identify punctures that may have occurred during the
installation of rebar, post tension cables, etc.
D. Post Installation Inspection: After the engineer has signed-off on the vapor barrier installation and the concrete reinforcing system has been completed, it is
recommended that a final visual inspection be performed prior to the pouring of
concrete. Damage to the vapor barrier system is most likely to occur during this
time, and it is imperative that punctures are identified and repaired prior to the
placement of concrete. E. Vapor Intrusion Barrier System Performance Testing: Performance testing of the
vapor intrusion barrier system will be performed by conducting air quality
laboratory analytical testing, whose implementation may not commence until
DENR has approved the testing protocol it in writing. Performance testing shall be
conducted after commissioning of the buildings’ heating, ventilation, and air
Vapor Intrusion Barrier Design – Revision 2 S&ME Project 1054-10-288C Circle at Ninth Street, Durham, North Carolina February 29, 2012
8
conditioning (HVAC) systems. The performance testing shall demonstrate the
system’s effectiveness as a contaminant vapor barrier to protect the building’s
occupants from the risk associated with vapor intrusion by VOCs. Should
performance testing of the vapor intrusion mitigation system indicate a vapor intrusion risk from VOCs, the passive venting layer will be modified to be an active venting system.
Attachments:
Raven Industries VaporBlock Product Specifications and Installation Guidelines Figure 1 – Structures Requiring Vapor Intrusion Barrier Figure 2 – Vapor Intrusion Barrier Installation Details
Product Part #
VAPORBLOCK .......................................................................... VB6
VAPORBLOCK ........................................................................ VB10
VAPORBLOCK ........................................................................ VB15
Product Description
VaporBlock® is a high performance underslab vapor barrier designed to retard moisture migration through concrete slabs-on-grade. This product is made from state-of-the-art polyethylene resins that provide superior physical and performance properties that far exceed ASTM E-1745 (Plastic Water Vapor Retarders Used in Contact with Soil or Granular Fill Under Concrete Slabs) Class A, B and C requirements.
High tensile strength, unequaled puncture resistance, ultra lowmoisture vapor permeability as well as resistance to decay make VaporBlock® one of the most effective underslab vapor barriers on the market today! Available in 6,10 and 15 mil thicknesses to best meet required performance specifications.
Product Use
VaporBlock® impedes the transmission of water vapor from
traveling upward through a concrete slab-on-grade or through a
concrete wall when properly installed. It is extremely important
to avoid puncturing a vapor retarder during installation to assure
proper performance. VaporBlock’s puncture strength is second
to none, withstanding even the most demanding installation
conditions.
VaporBlock® protects your flooring and other moisture sensitive
furnishings in your building’s interior from moisture migration.
VaporBlock can also greatly reduce condensation, mold and
degradation by controlling water vapor migration.
Size & Packaging
VaporBlock® 6 &10 are available in 15’ wide rolls by 200’
long for ease of installation and maximum coverage.
VaporBlock® 15 is available in 12’ wide rolls by 200’ long.
Other custom sizes are available depending upon size and
volume requirements. All rolls are folded and rolled on
heavy-duty cores for ease in handling and installation.
Installation instructions and ASTM E-1745 classifications
accompany each roll.
Vapor Barrier - Commercial
VaporBlock® Barrier
VAPORBLOCK VB6, VB10 & VB15
APPLICATIONS
Underslab Vapor Retarder/Barrier
Foundation Wall Vapor Retarder
Radon Retarder
High Performance Underslab Vapor Barrier
®
Engineered Films Division
P.O. Box 5107Sioux Falls, SD 57117-5107Ph: [phone] • Fx: [phone]
Toll Free: 800-635-3456Email: [e-mail]
11/11 EFD 1092
VAPORBLOCK VB6, VB10 & VB15
High Performance Underslab Vapor Barrier
VAPORBLOCK VB6 VAPORBLOCK VB10 VAPORBLOCK VB15
PROPERTIES TEST METHOD Imperial Metric Imperial Metric Imperial Metric
APPEARANCE Blue Blue Blue
THICKNESS, NOMINAL 6 mil 0.15 mm 10 mil 0.25 mm 15 mil 0.38 mm
WEIGHT 29 lbs/MSF 151 g/m² 49 lbs/MSF 249 g/m² 73 lbs/MSF 356 g/m²
CLASSIFICATION ASTM E1745 CLASS C CLASS A, B & C CLASS A, B & C
TENSILE STRENGTH
AVERAGE MD & TD
(NEW MATERIAL)
(AFTER EXPOSURE)
ASTM E154
Section 9, (D882)
32 lbs/in
25 lbs/in
56 N/cm
44 N/cm
52 lbs/in
53 lbs/in
91 N/cm
93 N/cm
88 lbs/in
92 lbs/in
154 N/cm
161 N/cm
PUNCTURE RESISTANCE ASTM D1709
Method B >1500 g >2600 g >4000 g
MAXIMUM USE TEMPERATURE 180° F 82° C 180° F 82° C 180° F 82° C
MINIMUM USE TEMPERATURE -70° F -57° C -70° F -57° C -70° F -57° C
PERMEANCE
(NEW MATERIAL)
(AFTER CONDITIONING)
ASTM E154
Section 7
ASTM E96
Procedure B
ASTM E154
Section 8, E96
Section 11, E96
Section 12, E96
Section 13, E96
0.090
*Perms
0.105
0.124
0.097
0.099
0.060
**Perms
0.069
0.082
0.064
0.065
0.0146
*Perms
0.0153
0.0151
0.0160
0.0181
0.0096
**Perms
0.0101
0.0099
0.0105
0.0119
0.009
*Perms
0.0104
0.0102
0.0101
0.0091
0.0059
**Perms
0.0069
0.0067
0.0067
0.0060
WVTR ASTM E96
Procedure B
0.080
grain/hr-ft²
0.056
gm/hr-m²
0.0084
grain/hr-ft²
0.0059
gm/hr-m²
0.0054
grain/hr-ft²
0.0038
gm/hr-m²
VaporBlock® high-performance vapor retarder/barriers are made from
state-of-the-art polyolen resins (virgin-grade) to provide unmatched
impact strength and ultra-low water vapor permeance. VaporBlock® can
be identied as blue in color printed with the VaporBlock® logo and the
conformance information listing ASTM E 1745, classications.
VaporBlock® Placement
All instructions on architectural or structural drawings should be reviewed and followed. Detailed installation instructions accompany each roll of VaporBlock® and can also be located on our website. ASTM E-1643 also provides general installation information for vapor retarders.
®
* grains/(ft²·hr·in·Hg)
** g/(24hr·m²·mm Hg)
Limited Warranty available at www.RavenEFD.com
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.
ACCESSORIES
Seaming Tapes & Attachment Items for Plastic Sheeting
Accessory Tapes
Canvex® Seal Tape (TS4WT)
Canvex Seal Tape is a single-sided white woven
tape that contains an acrylic adhesive with
a release liner. It has excellent adhesion to
polyethylene and the acrylic adhesive provides
much longer life than many competitive tapes. It
is recommended for taping the seams on in-wall
vapor retarders and crawl spaces.
Available in a 4” x 100’ roll.
Butyl Seal Tape (TP2BR)
Butyl seal is a double-sided reinforced aggressive black butyl rubber tape used to join panels of polyethylene and polypropylene together by overlapping the edges and applying Butyl Seal in between. It is also used to adhere to concrete walls and footings when properly prepared. Butyl Seal is non-hardening and flexible. Available in 2” x 50’ roll.
R25B Tape (R25B)
R25B Tape is a single sided aggressive synthetic
elastomeric adhesive that bonds instantly
to properly prepared polyethylene and
polypropylene. The black polymer backing and
adhesive is specially formulated to provide years
of performance even in direct sunlight. A poly
release liner provides for ease of installation.
Available in a 4” x 100’ roll.
VaporBond Tape (TVB4)
This white single-sided tape combines a heavy-
duty, weather-resistant polyethylene backing
with an aggressive rubber adhesive. VaporBond
Tape offers excellent seaming capabilities for
our materials with an “Easy Tear” feature to
reduce installation time. TVB4 has a WVTR of
0.18 perms per ASTM D 833. Typical applications
include vapor retarders, covers and liners.
Available in a 4” x 210’ roll.
VaporBond Plus Tape (TVBP4)
VaporBond Plus is a single-sided aluminum foil
tape with a release liner for ease of installation.
The aluminum foil has very high impermiability
to methane and other gases. Acrylic adhesive
provides outstanding adhesion to polyethylene
over a wide temperature range. Typical uses
include joining and sealing gas/moisture barriers.
Available in 4” x 150’ rolls
VaporBoot Tape (TBOOT)
VaporBoot Tape is a single-sided elastomeric
butyl tape used to complete pipe boot
installations (sealing the boot to the pipe).
The 100% stretchable Butyl adhesive features
excellent adhesion values and 3-D stretching
that can be easily molded to multiple surfaces
without any creases and folds.
Available in 2” x 10’ roll.
Additional Accessories
VaporBoot System (VBOOT)
The VaporBoot System is designed to assist in securing pipe and other penetrations that run vertically through the vapor retarder material. The VaporBoot System offers a quick solution and is delivered to the jobsite in a complete package. VaporBoots are produced from high performance VaporBlock® material. Package Contents: 25 - VaporBoots (18” x 18”, w/precut center marker)2 - rolls of VaporBoot Tape.
VaporBoot Plus Preformed Pipe Boots (VBPBT)
VaporBoot Plus Preformed Pipe Boots are produced from heavy 40 mil co-extruded polyethylene and barrier resins for excellent strength and durability. The preformed boots are stepped to fit 1” to 4” wide pipe penetrations. VaporBoot Plus Preformed Pipe Boots are available in quantities of 12 per box.
From tie-down fasteners to field seaming tape, Raven Industries has the accessories you
need to maximize your film’s versatility and minimize installation time on the job.
Engineered Films Division
P.O. Box 5107Sioux Falls, SD 57117-5107Ph: [phone] • Fx: [phone]
Toll Free: 800-635-3456Email: [e-mail]8/11 EFD 1103
ACCESSORIES
Canvex® Seal Tape VaporBond Tape VaporBond Plus Tape VaporBoot Tape R25B Tape Butyl Seal Tape
(TS4WT) (TVB4) (TVBP4) (TBOOT) (R25B) (TP2BR)
Backing Woven 7.5 mil 1.5 mil Coated Release 8 mil Coated Release
Co-Polymer Polyethylene Aluminum Paper Polyethylene Paper
Adhesive 1.75 mil Acrylic Adhesive 1.5 mil Rubber Based 2 mil Acrylic Adhesive .5 mm Black 17 mil +/- 2 mil 1 mm Black Pressure-Sensitive Pressure-Sensitive Pressure-Sensitive Butyl Rubber Synthetic Elastomeric Butyl Rubber
Color White White Silver Black Black Black
Type Single Sided Single Sided Single Sided Single Sided Single Sided Double Sided
Size 4” x 100’ 4” x 210’ 4” x 150’ 2” x 10’ 4” x 100’ 2” x 50’
Rolls Per Case 12 12 12 64 6 20
Weight Per Case 16 lbs 45 lbs 32 lbs 45 lbs 33 lbs 55 lbs
Adhesion Values 45 oz./ in. (to steel) 30 oz./ in. (to steel) 64 oz./ in. (to steel) 145 oz./ in. (to steel) 320 oz./ in. (to steel) 107.5 oz./ in. (to steel)
Service Temp. -40° F to +200° F -40° F to +180° F -40° F to +250° F 14° F to +122° F 20° F to +180° F 30° F to +100° F
Minimum 10° F 50° F 10° F 14° F 35° F 35° F
Application Temp.
Ideal Storage 70° F w/ 40-50% 70° F w/ 40-50% 70° F w/ 40-50% 70° F w/ 70% 70° F w/ 40-50% 70° F w/ 40-50% Temp./Humidity
Tape Accessory Properties
Additional Accessories (continued)
Tie-Down Buttons (BUTI) & Tarp Grabbers (BUTEZ)
Tie-Down Buttons & Tarp Grabbers help keep plastic
sheeting securely in place. Tie-Down Buttons are
designed to eliminate traditional grommets in plastic
sheeting up to 10 mil thick and are reusable
plastic fittings that are easy to install in any
position. Tarp Grabbers are up to 4 times
stronger than a brass grommet and are
typically used in heavier plastic sheeting from
10 mil to 30 mil thick. Great for equipment
covers, large storage covers and truck tarps.
Dura♦Skrim® Reinforced Sandbags
Dura♦Skrim reinforced sandbags are used
to secure large covers and liners to prevent
wind damage. Made from Dura♦Skrim
8 & 12 mil reinforced polyethylene, they
are designed for a minimum life of 2
years in exposed applications. These 15”
wide x 24” long bags will hold 35 lbs.
Sandbags are available in other Raven
reinforced materials with minimum
order requirements. 11.8” Cable Ties
are also available.
Dura-Clip (CLIP11)
These full size clips are 11” long and fit most commercial scaffolding. Dura-Clips will securely fasten your poly sheeting to scaffolding, reducing wind whip and increasing the life of your enclosure. Clips are normally placed about every 3’ onto the enclosure.
Raven Welding Rod
Raven Welding Rod is used for field
seaming, repairs and detail work, such
as installing pipe boots. Packaged in
10 lb spools, it is available in 4mm and
5mm sizes to fit most brands of extrusion
guns. Raven Welding Rod is made
from a thermally UV stabilized LLDPE
resin and is available in both black and
white to correspond with the color of
geomembranes being utilized.
Limited Warranty available at www.RavenEFD.com
Seaming Tapes & Attachments for Plastic Sheeting
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.
INSTALLATION GUIDELINES
Please Note: Read these instructions
thoroughly before installation to ensure proper
use of VaporBlock®. ASTM E 1643 can also
provide valuable information regarding the
installation of vapor retarders. When installing
this product, contractors shall conform to all
applicable local, state and federal regulations
and laws pertaining to residential and
commercial building construction.
Materials List:
VaporBlock® Vapor Retarder (Barrier)
VaporBond 4” Seaming Tape
Butyl Seal 2-Sided Tape
VaporBoot Pipe Boot System 25/Tube plus Tape
VaporBoot Tape (optional)
Elements of a moisture-resistant oor system. General illustration only.(Note: This example shows multiple options for waterstop placement.)
An optional perimeter wall class “A” vapor retarder can be installed with or without a bituminous coating applied to the concrete.
VaporBlock® 10 or 15 mil (Class A) vapor retarders can be sealed to the perimeter wall with Butyl Seal Tape. An optional footer wrap may also be applied.
Elements of a moisture-resistant oor system. General illustration only.(Note: This example shows multiple options for waterstop placement.)
OPTIONAL PERIMETER WALL & FOOTER METHODS
Page 1 of 4
Original diagrams on this page 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.
Overlap joints a minimum of 6” and seal overlap with VaporBond Tape.
1.4. Seal around all plumbing, conduit, support columns or other penetrations that come through the VaporBlock membrane. The VaporBoot Pipe Boot System is the recommended sealing method. (Includes 25 pre-cut VaporBlock pipe boots along with 2 rolls of VaporBoot Tape). (Fig. 3 & 4)
Pipe boots may also be fabricated from excess VaporBlock
membrane (Fig. 3 & 4) and sealed with VaporBoot Tape or
VaporBond Tape (sold separately).
Reminder Note: All holes or penetrations through the membrane will need a patch cut to a minimum of 6” from the opening in all directions.
To fabricate pipe boots from VaporBlock excess material (see Fig. 3 & 4 for A-E):
A) Cut a square large enough to overlap 6” 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) Use VaporBoot Tape or VaporBond 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 o the second half of the release liner and work the tape outward gradually forming a complete seal.
VaporBond Tape (option) - Tape completely around the
pipe overlapping the to get a tight seal against the pipe.
E) Complete the process by taping over the boot perimeter
edge with VaporBond Tape to create a monolithic
membrane between the surface of the slab and moisture
sources below and at the slab perimeter. (Fig. 3 & 4)
SINGLE PENETRATION PIPE BOOT INSTALLATION
Fig. 3
1. Use a pre- cut V aporBoot or cut a sq uare of V aporBlock barrier to extend at least 6” from the pipe in all directions.
3 . Force over pipe.
2. Cut four to eight slices about 3 / 8” less than the diameter of the pipe.
5 . Use V aporBoot or V aporBond T ape and overlap 1” at the seam.
4 . T ape over the boot perimeter edge with V aporBond T ape.
Pipe Boot Diagram
Fig. 4
T ap e ar ou n d t h e p er i m et er of t h e p en et r at i on an d t h e p at c h w i t h V ap or B on d 4” T ap e
F or ad d i t i on al Pr ot ec t i on ap p l y
an ac c ep t ab l e p ol y u r et h an e el as t om er i c s eal an t ar ou n d t h e p en et r at i on s .
C u t a p at c h l ar ge en ou gh
t o ov er l ap 6 ” i n al l d i r ec t i on s an d s l i d e ov er p en et r at i on s ( M ak e op en i n gs at t i gh t as p os s i b l e. )
6”
V aporBoot Flexible T apeor V aporBond 4 ” T ape
V aporBond 4 ” T ape
V aporBoot or cut sq uare of V aporBlockMaterial
6”( min.)
1.1. Level and tamp or roll granular base as specied by your
architectural or structural drawings. If sharp crushed rock is
used, a 1/2” layer of ne grade compactable ll is required
between the base and the vapor retarder.
1.2. Unroll VaporBlock 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 over the footings and seal with 2-sided Butyl Seal tape. Prime concrete surfaces and assure they are dry and clean prior to applying Butyl Seal Tape. Apply even and rm pressure with a rubber roller.
Fig. 2: VaporBlock Overlap Joint Sealing Method Fig. 1: VaporBlock Overlaping Roll-out Method
VAPORBLOCK® PLACEMENT
V aporBond 4 ” T ape
Page 2 of 4
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1.5. For side-by-side multiple penetrations;
A) Cut a patch large enough to overlap 6” in all directions
(Fig. 6) 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) Slide patch material over penetration to achieve a tight t.
D) Tape around each of the penetrations and the patch with
VaporBond 4” Tape. (Fig. 7) For additional protection
apply an acceptable polyurethane elastomeric sealant
around the penetrations. (Fig. 8)
1.6. Holes or openings through VaporBlock are to be repaired
by cutting a piece of VaporBlock 6” larger in all directions
from the opening. Seal the edges of the patch with
VaporBond Tape.
Fig. 6 Fig. 7
Fig. 8
MULTIPLE PENETRATION PIPE BOOT INSTALLATION
Cut a patch large enough to overlap 6” in all directions and slide over penetrations ( Make openings as tight as possible.)
T ape around the perimeter of penetration and patch with V aporBond 4 ” T ape.
For additional protection
apply an acceptable polyurethane elastomeric sealant around the penetrations.
Fig. 5
V aporBoot Flexible T apeor V aporBond 4 ” T ape
V aporBond 4 ” T ape
V aporBlock Material6”( min.)
6” ( min.)
Page 3 of 4
06/09 EFD 1156
Note: To the best of our knowledge, these are typical installation procedures and are intended as guidelines only. Architectural or
structural drawings must be reviewed and followed as well as on a project basis. NO WARRANTIES ARE MADE AS TO THE FITNESS FOR
A SPECIFIC USE OR MERCHANTABILITY OF PRODUCTS OR GUIDELINES REFERRED TO, no guarantee of satisfactory results from reliance
upon contained information or recommendations and we disclaim all liability for resulting loss or damage.
www.globalplasticsheeting.com
ISO 9001:2000 CERTIFIED MANAGEMENT SYSTEM
VAPORBLOCK® PROTECTION
2.1. When installing reinforcing steel and utilities, in addition
to the placement of concrete, take precaution to protect
VaporBlock. Carelessness during installation can damage
the most puncture–resistant membrane. Sheets of plywood
cushioned with geotextile fabric temporarily placed on
VaporBlock provide for additional protection in high trac
areas including concrete buggies.
2.2. Use only brick-type or chair-type reinforcing bar supports to
protect VaporBlock from puncture.
2.3. Avoid driving stakes through VaporBlock. If this cannot be
avoided, each individual hole must be repaired.
2.4. If a cushion or blotter layer is required in the design
between VaporBlock 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.
Page 4 of 4
Global Plastic Sheeting
1331 Specialty Drive
Vista, CA 92081
866.597.9298 760.597.9298

PHOTOGRAPHIC LOG

Circle at Ninth Street-Vapor Barrier Installation and Repair Observations
Ninth Street, Durham, North Carolina S&ME Project No. 1054-10-288C
Taken by: CEE/BB Date Taken: 7/24/12-10/2/14
1

1 July 5, 2012 building #5. Note PVC venting system (1” pipes). 2 July 5, 2012 building #5. Venting system prior to installation vapor barrier.

3 July 5, 2012 building #5. Venting system prior to installation of vapor barrier 4 July 9, 2012 Building #5. Vapor barrier with taped seams.

Circle at Ninth Street-Vapor Barrier Installation and Repair Observations
Ninth Street, Durham, North Carolina S&ME Project No. 1054-10-288C
Taken by: CEE/BB Date Taken: 7/24/12-10/2/14
2

5 Taped penetrations through the vapor barrier. 6 VIB vent pipe.

7 July 24, 2012. Building #5. 8 Building #5 installation.

Circle at Ninth Street-Vapor Barrier Installation and Repair Observations
Ninth Street, Durham, North Carolina S&ME Project No. 1054-10-288C
Taken by: CEE/BB Date Taken: 7/24/12-10/2/14
3

9 August 15, 2012, looking south toward buildings # 9 and 10 (VIB installation in progress). 10 Concrete poured on top of barrier.

11 September 5, 2012, stairwell VIB installation. 12 February 25, 2013, stair tower support.

Circle at Ninth Street-Vapor Barrier Installation and Repair Observations
Ninth Street, Durham, North Carolina S&ME Project No. 1054-10-288C
Taken by: CEE/BB Date Taken: 7/24/12-10/2/14
4

13 Stair tower support with VIB installed. 14 May 23, 2013, reinforcement over VIB prior to concrete pour.

15 May 30, 2014, venting system extending through the wall
in building #5. .
16 Venting pipe in building #8.

Circle at Ninth Street-Vapor Barrier Installation and Repair Observations
Ninth Street, Durham, North Carolina S&ME Project No. 1054-10-288C
Taken by: CEE/BB Date Taken: 7/24/12-10/2/14
5

17 Vent extending through roof. 18 Damage to VIB around plumbing. Repairs made later (Photo #21).

19 July 24, 2014 vapor barrier. 20 Vapor barrier repairs.

Circle at Ninth Street-Vapor Barrier Installation and Repair Observations
Ninth Street, Durham, North Carolina S&ME Project No. 1054-10-288C
Taken by: CEE/BB Date Taken: 7/24/12-10/2/14
6

21 Vapor barrier repairs around conduit. 22 Vapor barrier repairs.

23 October 2, 2014 vapor barrier repairs. 24 October 2, 2014 vapor barrier repairs.

Circle at Ninth Street-Vapor Barrier Installation and Repair Observations
Ninth Street, Durham, North Carolina S&ME Project No. 1054-10-288C
Taken by: CEE/BB Date Taken: 7/24/12-10/2/14
7

Intentionally blank
25 October 2, 2014 vapor barrier repairs. 26

VAPOR INTRUSION BARRIER INSTALLATION
OBSERVATION FIELD NOTES