23060_Philcron Automotive II_VIMP Addendum_20230523

Via Email May 23, 2023
North Carolina Department of Environmental Quality
Division of Waste Management – Brownfields Program 1646 Mail Service Center Raleigh, North Carolina 27699-1646
Attn: Mr. Pete Doorn
Re: Vapor Intrusion Mitigation Plan Addendum Philcron Automotive II
2161 Hawkins Street Charlotte, North Carolina Brownfields Project No. 23060-19-060 H&H Job No. POR-002
Dear Pete:

1.0 Introduction

Hart & Hickman, PC (H&H) has prepared this Vapor Intrusion Mitigation Plan (VIMP)
Addendum on behalf of Charlotte Hawkins, LLC (Prospective Developer or PD) to document
modifications to the vapor intrusion mitigation system associated with the planned
redevelopment of the Philcron Automotive II Brownfields property (Brownfields Project No.
23060-19-060) located at 2161 Hawkins Street in Charlotte, Mecklenburg County, North
Carolina (Site or subject Site). The Site redevelopment includes construction of a twenty-four
story multi-use (retail and residential) building.

To address potential vapor intrusion concerns for the building, H&H prepared a Vapor Intrusion
Mitigation Plan (VIMP) and following DEQ review, a revised VIMP based on DEQ comments.
In a letter dated August 9, 2022, the DEQ Brownfields Program provided approval of the revised
VIMP dated August 2, 2022.
Mr. Pete Doorn #C-1269 Engineering May 23, 2023
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The VIMP included installation of a vapor intrusion mitigation system (VIMS) designed to
minimize potential vapor intrusion into the Site building using passive sub-slab venting. The
passive sub-slab venting system includes a network of horizontal piping installed beneath the
slab of the building. Vertical risers will run from the sub-slab to discharge locations above the
building roofline at which passive turbine ventilators will be installed on the discharge end of
the vertical riser exhaust piping to further promote sub-slab depressurization.

The DEQ-approved VIMP specifies 3-inch diameter SCH 40 PVC or soil gas collector mat
manufactured by Radon Professional Discount Supply (Radon PDS) as the products for use in
the sub-slab collection system. The construction contractor has requested to use TerraVent™
manufactured by LandScience as an alternative to the soil gas collector mat. In addition, H&H
understands that the architectural drawing sets have been revised and as such, the vapor intrusion
mitigation system (VIMS) design will need to be updated based on the building changes. A
discussion of the minor piping layout modifications and the TerraVent™ is included below.

Mr. Pete Doorn #C-1269 Engineering May 23, 2023
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2.0 Proposed VIMS Modifications
The proposed VIMS modifications include minor sub-slab and above-slab piping layout changes
and the use of TerraVent™ for the sub-slab horizontal collection system, as described below.

TerraVent™ Specifications
The construction contractor has requested to use TerraVent™ manufactured by LandScience as
an alternative sub-slab vapor collection system to the proposed sub-slab slotted PVC piping or
soil gas collector mat.

The TerraVent™ has comparable specifications to the soil gas collector mat and is a
polypropylene plastic rectangular conduit with a geotextile fabric covering that is 1-inch thick
and 12-inches wide specifically designed for collecting soil gas from below a building slab. The
TerraVent™ will be connected to the solid PVC connections at vertical risers and thickened
slabs using LandScience manufactured riser connector fittings in accordance with the
manufacturer installation instructions. The modification is approved by the design engineer (a
NC Professional Engineer) because the TerraVent™ and accessories are an equivalent sub-slab
soil gas collection conduit to the soil gas collector mat proposed in the DEQ-approved VIMP.
Product specification sheets are provided as Attachment A.

VIMS Layout
As part of construction preparation activities, the proposed building layout has been updated
since the initial VIMS design (included in the DEQ-approved VIMP) was completed. As such,
minor layout changes were made to accommodate new building conditions. In select locations,
the sub-slab horizontal collection system was modified by either shifting sub-slab collection
network runs or rerouting the connections. With the exception of extraction point location E-5,
all risers remain in the same locations. Riser E-5 was moved to an adjacent column line in order
to avoid other building systems routed at the previously identified column location. All
horizontal sub-slab networks remain connected to the same risers, no risers were added or
removed, and all the proposed monitoring point locations remain the same.

Mr. Pete Doorn #C-1269 Engineering May 23, 2023
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In addition to the minor sub-slab layout modifications, the final rooftop discharge locations were
also modified. Building design changes were made on the 7th floor, on which the risers are
proposed to discharge, and therefore the original discharge locations did not meet the minimum
distance requirement of 10 feet from an air intake or building opening. As such, the riser
discharge locations for extraction points E-1, E-2, E-3, and E-5 were moved to terminate in the
western portion of the building where the 7th floor roof is open. Additionally, E-6 was shifted
toward the east and closer to the column at which the riser runs vertically. In order to route the
risers to the new discharge locations, the riser piping routing was also modified on the 6th floor.
Revised VIMS design sheets are included in Attachment B.

Engineer’s Certification
According to the DWM Vapor Intrusion Guidance: “Risk-based screening is used to identify
sites or buildings likely to pose a health concern, to identify buildings that may warrant
immediate action, to help focus site-specific investigation activities or to provide support for
building mitigation and other risk management options including remediation.” In addition, this
VIMP modification request was prepared to satisfy the vapor intrusion mitigation condition in
the Brownfields Agreement. Per the North Carolina Brownfields Property Reuse Act 130A-
310.32, a prospective developer, with the assistance of H&H for this project, is to provide
NCDEQ with “information necessary to demonstrate that ... as a result of the implementation of
the brownfields agreement, the brownfields property will be suitable for the uses specified in the
agreement while fully protecting public health and the environment instead of being remediated
to unrestricted use standards.” It is in the context of these risk-based concepts that H&H’s
professional engineer makes the following statement.

The Vapor Intrusion Mitigation System (VIMS) detailed herein is designed to mitigate intrusion
of subsurface vapors into the subject building from known Brownfields Property contaminants in
a manner that is in accordance with the most recent and applicable guidelines including, but not
limited to, DWM Vapor Intrusion Guidance, Interstate Technology & Regulatory Council
(ITRC) guidance, and American National Standards Institute (ANSI)/American Association of
Radon Scientists and Technologists (AARST) standards. The sealing professional engineer

Attachment A TerraVent™ Specifications
TerraVent Submittal Package
A. Drawings and general provisions of the contract, including General and Supplementary Conditions and Division 1
Specification Sections, apply to this section.
1.1 RELATED DOCUMENTS
TerraVent™
SOIL GAS COLLECTION SYSTEM
Version 1.0
PART 1 – GENERAL
A. This Section includes the following:
1.2 SUMMARY
1. Substrate preparation.
2. TerraVent™ installation.
3. TerraVent accessories.
B. Related Sections: The following Sections contain requirements that relate to this Section:
1. Division 2 Section “Earthwork,” “Pipe Materials,” “Sub-drainage systems,” ”Gas Control System,”
“Fluid-Applied gas barrier.”
2. Division 3 Section “Cast-in-Place Concrete” for concrete placement, curing, and finishing.
3. Division 5 Section “Expansion Joint Cover Assemblies,” for expansion-joint covers assemblies and installation.
A. General: Provide a gas-venting material that collects gas vapors and directs them to discharge or to collection
points as specified in the gas vapor collection system drawings and complies with the physical requirements
set forth by the manufacturer.
1.3 PERFORMANCE REQUIREMENTS
SECTION 02 56 19 – GAS CONTROL
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
2020
TerraVent side view shown here
TerraVent Submittal Package
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
2020
A. Submit product data for each type of gas venting system specified,
including manufacturer’s specifications.
1.4 SUBMITTALS
1. Gas-venting, TerraVent.
2. TerraVent accessories.
A. Installer Qualifications: Engage an experienced installer who is certified in writing and approved by vapor
intrusion barrier manufacturer Land Science for the installation of the Land Science Barrier System.
1.5 QUALITY ASSURANCE
A. Deliver materials to project site as specified by manufacturer labeled with manufacturer’s name, product brand
name and type, date of manufacture, shelf life, and directions for handling.
1.6 DELIVERY, STORAGE, AND HANDLING
B. Sample – Submit representative samples of the following
for approval:
B. Manufacturer Qualification: Obtain gas-venting, vapor intrusion barrier and system components from a single
manufacturer Land Science.
C. Pre-installation Conference: A pre-installation conference shall be held prior to installation of the venting
system, vapor intrusion barrier and waterproofing system to assure proper site and installation conditions,
to include contractor, applicator, architect/engineer and special inspector (if any).
B. Store materials as specified by the manufacturer in a clean, dry, protected location and within the temperature
range required by manufacturer. Protect stored materials from direct sunlight.
C. Remove and replace material that is damaged.
TerraVent connection over footing
TerraVent Submittal Package
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
2020
Properties
Properties
Compressive Strength ASTM D-1621
Test Method
Thickness
Properties
B. Vent Core Properties
TerraVent
CBR Puncture
Flow
Permittivity
Test Method
ASTM D-4632
ASTM D-6241
ASTM D-4751
ASTM D-4491
TerraVent
100 lbs.
70 U.S Sieve
140 gpm/ft2
2.0 sec-1
Dimension:12” x 165’
250 lbs.
AOS
U.V Resistance ASTM D-4355 70% @ 500 hrs.
Packaging
TerraVent Fabric Properties
Value
Weight 68 lbs.
Flow Rate (Hydraulic gradient = 0.1)ASTM D-4716
9,500 psf.
1 inch
30 gpm/ft width
Grab Tensile Strength
ASTM D-4491
A. Land Science, San Clemente, CA. [phone]
1. TerraVent™
2.1 MANUFACTURER
A. TerraVent – TerraVent is a low profile, trenchless, flexible, sub slab
vapor collection system used in lieu or in conjunction with perforated
piping. TerraVent is recommended for sites with aggressive chlorinated
volatile organic or petroleum vapors. Manufactured by Land Science.
2.2 GAS VENT MATERIALS
PART 2 – PRODUCTS
A. TerraVent End Outlet B. Reinforced Fabric Tape.
2.3 AUXILIARY MATERIALS
TerraVent packaged for shipping
TerraVent Submittal Package
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
2020
A. Examine substrates, areas, and conditions under which gas vent system will
be installed, with installer present, for compliance with requirements. Do not
proceed with installation until unsatisfactory conditions have been corrected.
3.1 EXAMINATION
PART 3 – EXECUTION
A. Verify substrate is prepared according to project requirements.
3.2 SUBSTRATE PREPARATION
A. Mark the layout of strip geocomposite per layout design developed by engineer.
3.3 PREPARATION FOR STRIP COMPOSITE
A. Install TerraVent over substrate material where designated on drawings with the flat base of the core
placed up and shall be overlapped in accordance with manufacturer’s recommendations.
3.4 STRIP GEOCOMPOSITE INSTALLATION
A. All overlying and adjacent material shall be placed or installed using approved procedures and guidelines
to prevent damage to the strip geocomposite.
3.5 PLACEMENT OF OVERLYING AND ADJACENT MATERIALS
B. At areas where TerraVent strips intersect cut and fold back fabric to expose the dimpled core. Arrange the strips
so that the top strip interconnects into the bottom strip. Unfold fabric to cover the core and use reinforcing tape,
as approved by the manufacturer, to seal the connection to prevent sand or gravel from entering the core.
C. When crossing TerraVent over 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 a TerraVent End Outlet at both ends of the pipe before connecting the TerraVent to
the pipe reducer. Seal the TerraVent to the TerraVent End Outlet using fabric reinforcement tape. Refer to
TerraVent detail provided by Land Science.
D. Place vent risers per specifying engineer’s project specifications. Connect TerraVent to TerraVent End Outlet
and seal with fabric reinforced tape. Use TerraVent End Outlet with the specified diameter piping as shown
on system drawings.
B. Equipment shall not be directly driven over and stakes or any other materials may not be driven through the
strip geocomposite.
TerraVent installed flush with subgrade
02 56 19 © 2018 Land Science
TerraVent™
SOIL GAS COLLECTION SYSTEM Version 2.0

SECTION 02 56 19 – GAS CONTROL
PART 1 – GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY A. This Section includes the following: 1. Substrate preparation.
2. TerraVent™ installation. 3. TerraVent accessories.
B. Related Sections: The following Sections contain requirements that relate to this Section: 1. Division 2 Section “Earthwork”, “Pipe Materials”, “Sub-drainage systems”, ”Gas Control System”, “Fluid-Applied gas barrier”. 2. Division 3 Section “Cast-in-Place Concrete” for concrete placement, curing, and finishing. 3. Division 5 Section “Expansion Joint Cover Assemblies”, for expansion-joint covers assemblies and installation. 1.3 PERFORMANCE REQUIREMENTS
A. General: Provide a gas venting material that collects gas vapors and directs them to discharge or to collection points as specified in the gas vapor collection system drawings and complies with the physical requirements set forth by the
manufacturer. 1.4 SUBMITTALS
A. Submit Product Data for each type of gas venting system specified, including manufacturer’s specifications.
B. Sample – Submit representative samples of the following for approval: 1. Gas venting, TerraVent.
2. TerraVent accessories. 1.5 QUALITY ASSURANCE
A. Installer Qualifications: Engage an experienced Installer who is certified in writing and approved by vapor intrusion barrier manufacturer Land Science for the installation of the MonoShield™ system. B. Manufacturer Qualification: Obtain gas venting, vapor intrusion barrier and system components from a single manufacturer Land Science. C. Pre-installation Conference: A pre-installation conference shall be held prior to installation of the venting system, vapor intrusion barrier and waterproofing system to assure proper site and installation conditions, to include contractor, applicator, architect/engineer and special inspector (if any).
1.6 DELIVERY, STORAGE, AND HANDLING A. Deliver materials to project site as specified by manufacturer labeled with manufacturer’s name, product brand name and type, date of manufacture, shelf life, and directions for handling.
02 56 19 © 2018 Land Science
B. Store materials as specified by the manufacturer in a clean, dry, protected location and within the temperature range required by manufacturer. Protect stored materials from direct sunlight. C. Remove and replace material that is
damaged. PART 2 – PRODUCTS
2.1 MANUFACTURER
A. Land Science, San Clemente, CA. [phone] 1. TerraVent™ 2.2 GAS VENT MATERIALS
A. TerraVent – TerraVent is a low profile, trenchless, flexible, sub slab vapor collection system used in lieu or in conjunction with perforated piping. TerraVent is recommended for sites with aggressive chlorinated volatile organic or petroleum vapors. Manufactured by Land Science. B. TerraVent physical properties
PROPERTIES TEST METHOD TerraVent

Vent Core Properties
Compressive Strength ASTM D-1621 9,500 psf.
Thickness 1 inch
Flow Rate - Hydraulic gradient - 0.1 ASTM D-4716 30 gpm/ft width

Vent Fabric Properties
Grab Tensile Strength ASTM D-4632 100 lbs.
CBR Puncture ASTM D-6241 250 lbs.
Flow ASTM D-4491 140 gpm/ft2
AOS ASTM D-4751 70 U.S Sieve
Permittivity ASTM D-4491 2.0 sec-1
U.V Resistance ASTM D-4355 70% @500 hrs.
Packaging: Dimension: 12”x 165’
Weight: 68 lbs.

2.3 AUXILIARY MATERIALS A. TerraVent End Outlet B. Reinforced Fabric Tape.
PART 3 – EXECUTION
02 56 19 © 2018 Land Science
3.1 EXAMINATION A. Examine substrates, areas, and conditions under which gas vent system will be installed, with installer present, for
compliance with requirements. Do not proceed with installation until unsatisfactory conditions have been corrected. 3.2 SUBSTRATE PREPARATION
A. Verify substrate is prepared according to project requirements.
3.3 PREPARATION FOR STRIP COMPOSITE A. Mark the layout of strip geocomposite per layout design developed by engineer.
3.4 STRIP GEOCOMPOSITE INSTALLATION
A. Install TerraVent over substrate material where designated on drawings with the flat base of the core placed up and shall be overlapped in accordance with manufacturer’s recommendations.
B. At areas where TerraVent strips intersect cut and fold back fabric to expose the dimpled core. Arrange the strips so that the top strip interconnects into the bottom strip. Unfold fabric to cover the core and use reinforcing tape, as approved by the manufacturer, to seal the connection to prevent sand or gravel from entering the core. C. When crossing TerraVent over 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 a TerraVent End Outlet at both ends of the pipe before connecting the TerraVent to the pipe reducer. Seal the TerraVent to the TerraVent End Outlet using fabric reinforcement tape. Refer to TerraVent detail provided by Land Science. D. Place vent risers per specifying engineer’s project specifications. Connect TerraVent to TerraVent End Outlet and seal with fabric reinforced tape. Use TerraVent End Outlet with the specified diameter piping as shown on system drawings. 3.5 PLACEMENT OF OVERLYING AND ADJACENT MATERIALS A. All overlying and adjacent material shall be placed or installed using approved procedures and guidelines to prevent damage to the strip geocomposite.
B. Equipment shall not be directly driven over and stakes or any other materials may not be driven through the strip geocomposite.
TerraVent Core Properties
TerraVent Fabric Properties
Packaging
Properties
Properties
Properties
Compressive Strength
Grab Tensile Strength
Dimension:
Weight
Thickness
CBR Puncture
AOS
U.V Resistance
Flow Rate (Hydraulic gradient = 0.1)
Flow
Permittivity
Test Method
Test Method
Value
ASTM D-1621
ASTM D-4632
12” x 165’
68 lbs.
ASTM D-6241
ASTM D-4751
ASTM D-4355
ASTM D-4716
ASTM D-4491
ASTM D-4491
TerraVent
TerraVent
9,500 psf.
100 lbs.
1 inch
250 lbs.
70 U.S Sieve
70% @ 500 hrs.
30 gpm/ft width
140 gpm/ft2
2.0 sec-1
TerraVent™ Technical Data Sheet
TerraVent is a low-profile, trenchless, flexible, sub-slab
vapor collection system used in lieu of perforated piping.
It consists of a heavy duty 3-dimensional, high flow,
polypropylene dimpled core. The core is then wrapped and
bonded with a non-woven geotextile to prevent soil, sand
or gravel pass into the dimple core. TerraVent core is made
from 100% Post-Industrial/Pre-Consumer polypropylene
regrind material.
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
© 2019 All rights reserved. REGENESIS is a registered trademark and TerraShield is a registered trademark of REGENESIS Bioremediation Products
TECHNICAL DATA

Attachment B VIMP Addendum Design Sheets
VAPOR MITIGATION PLANPREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
SPECIFICATIONS
VM-1
PROFESSIONAL
APPROVAL
VAPOR INTRUSION MITIGATION SYSTEM (VIMS) SPECIFICATIONS
1.THIS VAPOR MITIGATION PLAN IS INTENDED TO BE USED FOR DIRECTION OF VIMS COMPONENT INSTALLATION ONLY AND IS NOT INTENDED TO GUIDE CONSTRUCTION OF BUILDING STRUCTURAL COMPONENTS. CONSTRUCTION CONTRACTOR SHALL VERIFY CONSISTENCY OF VIMS DETAILS WITH APPLICABLE
STRUCTURAL, ARCHITECTURAL, MECHANICAL, & PLUMBING PLANS AND RESOLVE ANY INCONSISTENCIES PRIOR TO VIMS INSTALLATION.
2.VIMS VAPOR BARRIER (LINER) SHALL BE VAPORBLOCK PLUS 20 (VBP20) 20-MIL VAPOR LINER MANUFACTURED BY RAVEN INDUSTRIES (RAVEN). AS AN ALTERNATIVE, DRAGO WRAP 20-MIL VAPOR INTRUSION BARRIER MANUFACTURED BY STEGO INDUSTRIES, LLC (STEGO) CAN BE USED, PENDING APPROVAL BY THE
ENGINEER.
THE VAPOR LINER SHALL BE INSTALLED AS SPECIFIED HEREIN AND PER MANUFACTURER INSTALLATION INSTRUCTIONS TO CREATE A CONTINUOUS LINER BELOW MITIGATED AREAS, ALONG RETAINING WALLS, AND AT SLAB-ON-GRADE STEPS WITHIN THE EXTENT OF VAPOR LINER BOUNDARY. A MINIMUM 4-INCH
THICK BASE COURSE CONSISTING OF CLEAN #57 STONE (WASHED WITH NO FINES) SHALL BE INSTALLED BENEATH THE VIMS VAPOR LINER. A SIMILAR HIGH PERMEABILITY STONE MAY BE USED, PENDING APPROVAL BY THE ENGINEER.
2.1.THE VAPOR LINER SHALL BE PROPERLY SEALED IN ACCORDANCE WITH THE MANUFACTURER INSTALLATION INSTRUCTIONS AS SPECIFIED IN THESE DRAWINGS AT FOOTERS, SLAB STEPS, RETAINING WALLS, PENETRATIONS (SUCH AS PIPE PENETRATIONS), OR OTHER BUILDING COMPONENTS WITHIN THE VIMS
EXTENTS.
2.2.VAPOR BARRIER SHALL BE INSTALLED UNDER SLABS, ON WALLS, AND ALONG OTHER STRUCTURAL COMPONENTS WHICH COME IN CONTACT WITH BOTH AN OCCUPIABLE ENCLOSED SPACE AND SOIL. NOT ALL AREAS FOR THE VAPOR BARRIER MAY BE DEPICTED ON THE DRAWINGS. THE GENERAL
CONTRACTOR SHALL VERIFY ALL REQUIRED LOCATIONS FOR VAPOR BARRIER ALONG VERTICAL WALLS PRIOR TO CONSTRUCTION AND BACKFILLING ACTIVITIES.
2.3.ALL CONCRETE BOX-OUTS, INCLUDING BUT NOT LIMITED TO SHOWER/BATH TUB DRAINS, SHALL HAVE A CONTINUOUS VAPOR BARRIER INSTALLED BELOW.
2.4.VAPOR BARRIER SHALL EXTEND ALONG FOOTING EXTERIOR, IF POSSIBLE, AT LOCATIONS WHERE EXTERIOR GRADE IS HIGHER THAN INTERIOR GRADE.
2.5.IN AREAS WITH EXPANSION BOARDS (E.G. ALONG COLUMNS), THE VAPOR BARRIER MUST BE SEALED DIRECTLY TO THE CONCRETE WITH THE EXPANSION BOARD INSTALLED OVER THE VAPOR BARRIER.
2.6.THE INTERFACE OF THE STEEL COLUMNS (IF PRESENT) AND THE CONCRETE SLAB SHALL BE SEALED AT GRADE WITH A SELF-LEVELING POLYURETHANE SEALANT PER DIRECTION OF THE ENGINEER OR ENGINEER'S DESIGNEE. SIMILAR SEALANT PRODUCTS MAY BE APPROVED BY THE ENGINEER.
3.SUB-SLAB SLOTTED VAPOR COLLECTION PIPE SHALL BE TERRAVENT MANUFACTURED BY LANDSCIENCE. ALTERNATIVELY, 3" SCH 40 PVC PIPE WITH 0.020" TO 0.060" SLOT WIDTH AND 1/8" SLOT SPACING, SCH 40 PVC PERFORATED PIPE WITH 5/8" OR SMALLER DIAMETER PERFORATIONS, OR SOIL GAS COLLECTOR
MAT (1" X 12"), WITH SIMILAR AIR FLOW CHARACTERISTICS TO THE TERRAVENT MAY BE USED PENDING APPROVAL BY THE DESIGN ENGINEER. IF CIRCULAR PIPE IS USED, A PVC TERMINATION SCREEN (WALRICH CORPORATION #2202052, OR SIMILAR) SHOULD BE INSTALLED ON THE END OF PIPE.
3.1.TERRAVENT HALL BE SET WITHIN THE MINIMUM 4” BASE COURSE LAYER, WITH A MINIMUM OF 1” OF BASE COURSE MATERIAL BELOW THE PIPING.
3.2.TERRAVENT SHALL NOT BE USED THROUGH A CONCRETE FOOTING. SCH 40 PVC PIPE (3" DIA) SHALL BE USED FOR ALL SUB-SLAB VENT PIPE CROSSINGS THROUGH FOOTINGS. MANUFACTURER APPROVED FITTINGS SHALL BE UTILIZED TO CONNECT THE TERRAVENT TO PVC PIPING FOR CROSSINGS THROUGH
FOOTINGS AND AT RISER LOCATIONS.
4.4" METAL RISER DUCT PIPING SHALL BE INSTALLED TO CONNECT EACH SLAB PENETRATION LOCATION TO A ROOFTOP EXHAUST DISCHARGE POINT (SEE SPECIFICATION #5). ABOVE-SLAB RISER DUCT PIPE THAT RUNS BETWEEN THE SLAB PENETRATION AND THE ROOFTOP EXHAUST DISCHARGE SHALL BE INSTALLED
PER APPLICABLE BUILDING CODE AND AS SPECIFIED IN THE CONSTRUCTION DOCUMENTS AND DRAWINGS.
4.1.VERTICAL RISER PIPING SHALL BE AIRTIGHT.
4.2.VERTICAL RISER PIPING MUST BE INSTALLED PER 2018 NORTH CAROLINA STATE PLUMBING CODE.
4.3.VIMS BELOW AND ABOVE GRADE SOLID PIPING SHALL NOT BE TRAPPED AND SHALL BE SLOPED A MINIMUM OF 1/8 UNIT VERTICAL BY 12 UNITS HORIZONTAL (1% SLOPE) TO GRAVITY DRAIN. BENDS, TURNS, AND ELBOWS IN VERTICAL RISER PIPES SHALL BE MINIMIZED FROM THE SLAB TO THE ROOFTOP.
5.4" METAL RISER DUCT PIPING SHALL EXTEND IN A VERTICAL ORIENTATION THROUGH THE PARKING GARAGE ROOF AND TERMINATE A MINIMUM OF 2 FT ABOVE THE PARKING DECK ROOF LINE. EMPIRE MODEL EVO4SS STAINLESS STEEL VENTILATOR (OR ALTERNATE APPROVED BY DESIGN ENGINEER) SHALL BE
INSTALLED ON THE EXHAUST DISCHARGE END OF EACH RISER DUCT PIPE. THE 4" RISER DUCT PIPE AND THE VENTILATOR SHALL BE SECURED IN A VERTICAL ORIENTATION. SWEEPING ELBOW FITTINGS SHALL BE USED ABOVE THE SLAB, UNLESS OTHERWISE APPROVED BY THE DESIGN ENGINEER.
5.1.EXHAUST DISCHARGE LOCATIONS SHALL BE A MINIMUM OF 10 FT FROM ANY OPERABLE OPENING OR AIR INTAKE INTO THE BUILDING. NOTE THAT DISCHARGE LOCATIONS ON THE PARKING GARAGE ROOFTOP DEPICTED IN THE VAPOR MITIGATION PLAN MAY BE REPOSITIONED AS LONG AS THE NEW
POSITION MEETS THE REQUIREMENTS PRESENTED ABOVE, PENDING ENGINEER APPROVAL.
5.2.AN ELECTRICAL JUNCTION BOX (120VAC REQUIRED) FOR OUTDOOR USE SHALL BE INSTALLED NEAR THE PIPE DISCHARGE LOCATION ON THE ROOFTOP FOR POTENTIAL FUTURE CONVERSION TO ELECTRIC FANS, IF REQUIRED. ALL WIRING AND ELECTRICAL SHALL BE INSTALLED PER APPLICABLE BUILDING AND
ELECTRICAL CODES.
6.ABOVE-SLAB ACCESSIBLE RISER DUCT PIPING SHALL BE PERMANENTLY IDENTIFIED BY MEANS OF A TAG OR STENCIL AT A MINIMUM OF ONCE EVERY 10-LINEAR FT WITH "VAPOR MITIGATION: CONTACT MAINTENANCE". LABELS SHALL ALSO BE FIXED NEAR THE VENTILATORS IN AN ACCESSIBLE LOCATION AT THE
ROOF DISCHARGE.
7.MONITORING POINTS SHALL CONSIST OF 2-INCH DIAMETER SCH 40 PVC PIPE WITH A 90-DEGREE ELBOW TO FORM AN “L” SHAPE. A MINIMUM OF 6” SECTION OF PIPE AND MAXIMUM 6 FT SECTION OF PIPE, OR OTHERWISE APPROVED BY THE DESIGN ENGINEER, SHALL BE SET WITHIN THE BASE COURSE LAYER
WITH AN OPEN ENDED PIPE OR PIPE PROTECTION SCREEN AT THE TERMINATION. THE PIPE TERMINATION SHALL BE ENCASED WITHIN THE BASE COURSE LAYER.
7.1.THE HORIZONTAL PIPING SHALL BE SLOPED A MINIMUM OF 1/8 UNIT VERTICAL BY 12 UNITS HORIZONTAL (1% SLOPE) TO GRAVITY DRAIN TOWARDS THE PIPE TERMINATION AND PREVENT MOISTURE FROM COLLECTING AT THE 90-DEGREE ELBOW.
7.2.THE MONITORING POINT INTAKE SHALL BE PLACED A MINIMUM OF 5-FT FROM EXTERIOR FOOTERS.
7.3.MONITORING POINTS LOCATED IN STAIRWELLS ARE INTENDED TO BE INSTALLED BELOW STAIRWELL LANDINGS AND MAY BE RE-POSITIONED TO PROVIDE SUITABLE ACCESS TO THE POINT PER APPROVAL OF THE DESIGN ENGINEER.
7.4.THE END OF THE PIPE SHALL CONTAIN AN OPEN PIPE, A PVC TERMINATION SCREEN, HAVE A MINIMUM OF THREE 58" DIA HOLES DRILLED INTO A SOLID CAP, OR SHALL HAVE VENT SLOTS WITH MINIMUM 1 SQUARE INCH OF OPEN AREA.
7.5.A 4-INCH DIAMETER ADJUSTABLE FLOOR CLEAN-OUT (ZURN INDUSTRIES MODEL #CO2450-PV4, OR EQUIVALENT) SHALL BE INSTALLED AND SET FLUSH WITH THE FINISHED CONCRETE SURFACE.
8.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL USE "LOW OR NO VOC" PRODUCTS AND MATERIALS, WHEN POSSIBLE, AND SHALL NOT USE PRODUCTS CONTAINING THE COMPOUNDS TETRACHLOROETHENE (PCE) OR TRICHLOROETHENE (TCE). THE CONSTRUCTION CONTRACTOR AND
SUB-CONTRACTORS SHALL PROVIDE SAFETY DATA SHEETS (SDS) TO THE ENGINEER FOR THE PRODUCTS AND MATERIALS USED FOR CONSTRUCTION OF THE VIMS.
9.IN INSTANCES WHERE A THICKENED FOOTING OR RETAINING WALL IS NOT SPECIFIED AT THE EXTENT OF VAPOR LINER, A THICKENED SLAB OR FOOTER SHALL BE INSTALLED BY THE CONTRACTOR THAT INCLUDES A SOIL SUBBASE TO CREATE A CUT-OFF FOOTER AT THE EXTENT OF VAPOR LINER. THE ADDITIONAL
THICKENED SLAB OR FOOTER SHALL NOT ALLOW FOR CONTINUOUS GRAVEL BETWEEN THE VIMS EXTENTS AND EXTERIOR NON-MITIGATED AREAS.
10.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL AVOID THE USE OF TEMPORARY FORM BOARDS THAT PENETRATE THE VAPOR LINER WHERE POSSIBLE. IF TEMPORARY FORM BOARDS ARE USED, THE SIZE AND NUMBER OF PENETRATIONS THROUGH THE VAPOR LINER SHALL BE LIMITED AND
SMALL DIAMETER SOLID STAKES (I.E. METAL STAKES) SHALL BE USED. IN ALL CASES, AS FORM BOARDS ARE REMOVED, THE CONTRACTOR OR SUB-CONTRACTORS SHALL RESEAL ALL PENETRATIONS IN ACCORDANCE WITH VAPOR LINER MANUFACTURER INSTALLATION INSTRUCTIONS.
10.1.HOLLOW FORMS OR CONDUITS THAT CONNECT THE SUB-SLAB ANNULAR SPACE TO ENCLOSED ABOVE SLAB SPACES SHALL NOT BE PERMITTED.
10.2.AREAS OF UTILITY BANKS (e.g. LOCATION OF THREE OR MORE ADJACENT UTILITIES THROUGH THE SLAB) SHALL BE SEALED TO CREATE AN AIR-TIGHT BARRIER AROUND THE UTILITY CONDUITS USING RAVEN POUR N'SEAL OR STEGO-INDUSTRIES MASTIC PRIOR TO THE SLAB POUR. OTHER SEALANT METHODS IF
USED SHALL BE APPROVED BY THE DESIGN ENGINEER PRIOR TO APPLICATION.
11.INSPECTIONS: THE INSTALLATION CONTRACTOR(S) SHALL NOT COVER ANY PORTIONS OF THE VIMS WITHOUT INSPECTION. INSPECTIONS OF EACH COMPONENT OF THE VIMS SHALL BE CONDUCTED BY THE DESIGN ENGINEER, OR ENGINEER'S DESIGNEE, TO CONFIRM VIMS COMPONENTS ARE INSTALLED PER THE
APPROVED DESIGN. THE REQUIRED INSPECTION COMPONENTS INCLUDE: (1) INSPECTION OF SUB-SLAB PIPING LAYOUT, (2) GRAVEL PLACEMENT, AND (3) MONITORING POINT PLACEMENT PRIOR TO INSTALLING VAPOR BARRIER; (4) INSPECTION OF VAPOR BARRIER PRIOR TO POURING CONCRETE; (5) INSPECTION
OF ABOVE-GRADE PIPING LAYOUT; AND (6) INSPECTION OF VENTILATOR AND RISER DUCT PIPE CONNECTIONS. INSPECTIONS WILL BE COMBINED WHEN POSSIBLE DEPENDING ON THE CONSTRUCTION SEQUENCE/SCHEDULE. THE CONSTRUCTION CONTRACTOR(S) SHALL COORDINATE WITH THE ENGINEER TO
PERFORM THE REQUIRED INSPECTIONS. A MINIMUM 48-HOUR NOTICE SHALL BE GIVEN TO THE ENGINEER PRIOR TO THE REQUIRED INSPECTION(S).
12.PIPE SLEEVES, IF USED, SHALL BE PROPERLY SEALED TO PREVENT A PREFERENTIAL AIR PATHWAY FROM BELOW THE SLAB INTO THE BUILDING. REFER TO TO STRUCTURAL DRAWINGS FOR FOOTING DETAILS ADDRESSING VIMS PIPING.
13.WATERPROOFING INCLUDING MEMBRANES AND DRAINAGE MATS SHALL BE INSTALLED IN ACCORDANCE WITH THE ARCHITECTURAL AND STRUCTURAL PLANS. IF WATERPROOFING IS PRESENT, THE VAPOR BARRIER SHALL BE INSTALLED BETWEEN WATERPROOFING AND ANY DRAINAGE FEATURES INCLUDING
DRAINAGE MATS. THE INSTALLER SHALL CONFIRM THAT THE WATERPROOFING PRODUCTS AND SEALANTS USED DURING CONSTRUCTION ARE COMPATIBLE WITH THE SPECIFIED VAPOR BARRIER.
14.IF POUR-BACK AREAS ARE PRESENT, THE VIMS PIPING, VAPOR BARRIER, AND MONITORING POINTS SHALL BE PROTECTED BY THE INSTALLATION CONTRACTOR AND SUB-CONTRACTORS THROUGHOUT THE PROJECT.
14.1.PROTECTIVE MEASURES (E.G., FLAGGING, PROTECTIVE BOARDS, ETC.) SHALL BE USED AS NEEDED TO PREVENT DAMAGE TO THESE COMPONENTS.
14.2.THE MONITORING POINTS AND RISER DUCT PIPING MUST BE CAPPED WITH A REMOVABLE SLIP-CAP OR PLUG IMMEDIATELY FOLLOWING INSTALLATION TO PREVENT WATER AND/OR DEBRIS FROM ENTERING THE VIMS.
14.3.SIGNAGE THAT INDICATES PRECAUTIONS SHOULD BE TAKEN WHILE WORKING IN THE AREAS WITH EXPOSED BARRIERS WILL BE POSTED IN PROMINENT LOCATIONS IN THE AREAS OF TENANT SPACES.
14.4.ADDITIONAL VIMS INSPECTIONS OF THE POUR-BACK SPACES ARE REQUIRED DURING TENANT UPFIT. THE UPFIT CONTRACTOR MUST CONTACT THE DESIGN ENGINEER, OR ENGINEER'S DESIGNEE, TO PERFORM THE INSPECTIONS DESCRIBED IN SPECIFICATION 11.
H&H NO. POR-002
2161 HAWKINS2161 HAWKINS STREETCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 23060-19-060DEVELOPER:
PORTMAN RESIDENTIAL305 PEACHTREE CENTER AVE.SUITE 575ATLANTA, GEORGIA 30303
REVISIONS
REV DATE DESCRIPTION
0 5/17/22 DEQ SUBMISSION
1 8/2/22 DEQ COMMENTS
2 5/23/23 VIMP ADDENDUM
DATE: 5-23-23
S:\AAA-Master Projects\Portman Holdings\Hawkins Tower\VIMP Details.dwg, VM-1, 5/23/2023 10:55:50 AM, amckenzie
VAPOR BARRIER AND BASE COURSE (TYPICAL)1
BASE COURSE - CLEAN #57 STONEMIN 4" THICK BENEATH VAPOR BARRIER (SEESPECIFICATION #1)
VAPOR BARRIER (SEE SPECIFICATION #1)
CONCRETE FLOOR SLAB
SUB-BASE
NTSVM-2
3" SCH 40 THREADED FLUSH JOINTSLOTTED PVC PIPE SET WITHIN MIN 4"BASE COURSE (SEE SPECIFICATION #3)
VAPOR BARRIER (SEE SPECIFICATION #2)
SUB-BASE
CONCRETE FLOOR SLAB
SLOTTED COLLECTION PIPE (TYPICAL)2
NTSVM-2
PVC ENDCAP - DRILLAPPROX. 3 - 1/4" HOLES
CONCRETEFLOOR SLAB
BASE COURSE
SUB-BASE
VIMS PIPING THROUGH THICKENED SLAB
NTS
3
VM-2
SOLID 3"SCH 40 PVC
VAPOR BARRIER SEALED TO PIPEPER MANUFACTURER INSTRUCTIONS
PROVIDE PIPE SUPPORT TO PREVENTLOW POINT IN SOLID PIPE. MAINTAIN 1%SLOPE TOWARD SLOTTED SECTION OFPIPE (SEE SPECIFICATION #2)
VAPOR BARRIER
VAPOR LINER BENEATHFOOTER
WALL (VARIES)
PIPE SLEEVE
TERRAVENT
TERRAVENT IS NOT PERMITTED TO BEINSTALLED THROUGH CONCRETE FOOTERS ORTHICKENED SLABS
VIMS PIPING THROUGH SLAB STEP (OPTIONAL SUB-SLAB COLLECTION PIPE)
NTS
4
VM-2
SUB-BASE
VAPOR BARRIER
BASE COURSE
3" SCH 40 PVC45-DEGREE ELBOW
VAPOR BARRIER SEALED TOPIPE PER MANUFACTURERINSTRUCTIONS
SOLID 3" SCH 40 PVCPIPE SLEEVE(SEE SPECIFICATION #12)
WALL (VARIES)
SOIL GASCOLLECTOR MAT
MANUFACTURER SPECIFIEDFITTING TO 3" SCH 40 PVC
VIMS AT VERTICAL RISER (OPTIONAL SUB-SLAB COLLECTION PIPE)
NTS
5
VM-2
BRICK OR HOUSE SIDINGEXTERNAL WALL (NOT PRESENTAT ALL LOCATIONS)
STUD WALL
VAPOR LINER SEALED TO PIPEAND CONCRETE PERMANUFACTURER INSTRUCTIONS.
3" SCH 40 PVC RISER DUCT PIPE(SEE SPECIFICATION #4, #5 & #6)
4" TO 3" PVC REDUCER
4" SCH 40 PVC RISER DUCT PIPE
BASE COURSE
SOIL GASCOLLECTOR MAT
SUBBASE
SOIL GAS COLLECTOR MAT CONNECTION SEALED TO 4" SCH 40PVC RISER WITH POLYURETHANE SEALANT
SOIL GAS COLLECTOR MAT CONNECTION BLOCK TO PVC (ONE 0.5"DIAMETER HOLE DRILLED IN BOTTOM FOR MOISTURE DRAINAGE)
TERMINATE VAPORBARRIER AT SOIL GRADE,WHERE APPLICABLE
COLUMN BLOCKOUT
VIMS AT INTERIOR COLUMN (TYP)
NTS
6
VM-2
SUB-BASE
CONCRETE FLOOR SLAB
BASE COURSE
VAPOR BARRIER
T.O.F.
CIP CONCRETE COLUMN
CONCRETE FOOTING
T.O.C.
VAPOR BARRIER SEALED OUTSIDEOF CONCRETE COLUMN PERMANUFACTURER INSTRUCTIONS
SEE DETAIL 7/VM-2
COLUMN BLOCKOUT
VIMS PIPING AT INTERIOR COLUMN WITH RISER DUCT PIPING (TYP)
NTS
8
VM-2
SUB-BASE
BASE COURSE
VAPOR BARRIER
CONCRETE FOOTING
VAPOR BARRIER SEALED TOPIPE PER MANUFACTURERINSTRUCTIONS
TERRAVENT
4" SCH 40 PVC90-DEGREE ELBOW
4" METAL RISER DUCT PIPE (SEESPECIFICATIONS #5 & #6)
PIPE SLEEVE(SEE SPECIFICATION #12)
SEE DETAIL 7/VM-2
VAPOR BARRIER SEALED OUTSIDEOF CONCRETE COLUMN PERMANUFACTURER INSTRUCTIONS
AIR-TIGHT 4" DIA PVC TO METALTRANSITION COUPLING
MANUFACTURER SPECIFIEDFITTING TO 3" SCH 40 PVC
VIMS AT EXTERIOR COLUMN (TYP)
NTS
9
VM-2
SUB-BASE
CONCRETEFLOOR SLAB
BASE COURSE
VAPOR BARRIER
CIP CONCRETE COLUMN
VAPOR BARRIER SEALEDTO CONCRETE PERMANUFACTURERSINSTRUCTIONS
COLUMN BLOCKOUT
VAPOR BARRIER SEALEDTO CONCRETE ON EACHSIDE OF COLUMN SEE DETAIL 7/VM-2
VIMS AT COLUMNS - EXPANSION DETAIL (TYP)
NTS
7
VM-2
CIP CONCRETE COLUMN
CONCRETE FLOOR SLAB
VAPOR BARRIER SEALED TO CONCRETEPER MANUFACTURERS INSTRUCTIONS
COLUMN EXPANSION FORM(INSTALLED OVER VAPOR BARRIER)
VAPOR BARRIER
VIMS AT SHEAR WALL
NTS
10
VM-2
VAPOR BARRIER SEALED TO OUTSIDE OFCONCRETE AND WATERPROOFING/INSULATION (IFPRESENT) PER MANUFACTURER INSTRUCTIONS
VAPOR BARRIER
VIMS ELEVATOR PIT (TYP)
NTS
11
VM-2
VAPOR BARRIER SEALED TO OUTSIDE OFCONCRETE AND WATERPROOFING/INSULATION(IF PRESENT) PER MANUFACTURERINSTRUCTIONS VAPOR BARRIER
SUB-BASE
BASE COURSE
PILE CAP
SEE DETAIL 12/VM-2A
H&H NO. POR-002
VAPOR MITIGATION PLANPREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
CROSS-SECTION
DETAILS #1-11
VM-2
NOTES:
VIMS = VAPOR INTRUSION MITIGATION SYSTEM
TYP = TYPICAL
SCH = SCHEDULE
PVC = POLYVINYL CHLORIDE
NTS = NOT TO SCALEALL PIPE MEASUREMENTS ARE BY DIAMETER
PROFESSIONAL
APPROVAL2161 HAWKINS2161 HAWKINS STREETCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 23060-19-060DEVELOPER:
PORTMAN RESIDENTIAL305 PEACHTREE CENTER AVE.SUITE 575ATLANTA, GEORGIA 30303
REVISIONS
REV DATE DESCRIPTION
0 5/17/22 DEQ SUBMISSION
1 8/2/22 DEQ COMMENTS
2 5/23/23 VIMP ADDENDUM
DATE: 5-23-23
S:\AAA-Master Projects\Portman Holdings\Hawkins Tower\VIMP Details.dwg, VM-2, 5/23/2023 11:03:47 AM, amckenzie
12
VM-2A
SOIL SUB-BASE
VAPOR BARRIER
DRAINAGE MAT(IF PRESENT)
CONCRETE
NTS
VIMS AT ELEVATOR PIT - WATERPROOFING DETAIL (TYP)
WATERPROOFING MEMBRANE(IF PRESENT - REFER TO ARCH. PLANS)(SEE SPECIFICATION #13)
OPEN AIR SPACE
ENCLOSEDINTERIOR SPACE
VIMS AT RETAINING WALL ADJACENT TO OCCUPIED SPACE (TYP)
NTS
13
VM-2A
SUB-BASE
BASE COURSE
VAPOR BARRIER
VAPOR BARRIER SEALED TO OUTSIDE OFCONCRETE AND WATERPROOFING MEMBRANE(IF PRESENT) PER MANUFACTURERINSTRUCTIONS (SEE DETAIL 12/VM-2A)
WATERPROOFING AND RIGIDINSULATION (IF PRESENT -REFER TO ARCH. PLANS)
DRAIN
WALL (VARIES)
CONCRETEFLOOR SLAB
VIMS AT LOADING DOCK
NTS
14
VM-2A
VAPOR BARRIER
SUB-BASE
WALL (VARIES)
OPEN AIR SPACE
ENCLOSEDINTERIOR SPACE
BASE COURSE
VIMS AT DOCK LEVELER
NTS
15
VM-2A
SUB-BASE
VAPOR BARRIER
DOCKLEVELER
VAPOR BARRIER SEALEDTO CONCRETE PERMANUFACTURERINSTRUCTIONS
BASE COURSE
WALL (VARIES)
BASE COURSE
SUB-BASE
VAPOR BARRIER AT SLAB EDGE (TYP)16
NTSVM-2A
VAPOR LINERFINAL GRADE(VARIES)
OPTIONAL VAPOR LINERINSTALLATION METHOD
TERMINATE VAPORLINER AT SOIL GRADE,WHERE APPLICABLE
OPEN-AIREXTERIOR ENCLOSEDINTERIOR
VAPOR RETARDER, IFWARRANTED, BY OTHERS
VIMS AT UTILITY BANK (TYP)17
NTSVM-2A
INSTALL VAPOR BARRIER ASCLOSELY AS POSSIBLE TO EACHPENETRATION PRIOR TOAPPLICATION OF SEALANT
SEALANT SET AROUND UTILITY BANKSWITHIN DAM (e.g. RAVEN POUR 'NSEAL OR MASTIC WITH 2" MINOVERLAP WITH VAPOR BARRIER (SEESPECIFICATION #10)
SUB-BASE
BASE COURSE
VAPOR BARRIER CONCRETE SLAB
FINISHED FLOOR SLAB
2" SCH 40 PVC SET WITHIN GRAVEL LAYER
2" DRAIN EXPANSION TEST PLUG
VIMS MONITORING POINT - TYPICAL DETAIL VIEW
NTS
18
VM-A
VAPOR BARRIER PENETRATION SEALED TOPIPE PER MANUFACTURER INSTRUCTIONS
2" SCH 40 PVC 90 DEGREE ELBOW
FLOOR CLEANOUT, ADJUSTABLE, 4" DIA ZURNINDUSTRIES MODEL #CO2450-PV4 (OR ENGINEERAPPROVED EQUIVALENT) FLUSH WITH FINISHED FLOOR
BASE COURSE
4" x 2" FLUSH REDUCERBUSHING
PVC VENTED ENDCAP(SEE SPECIFICATION #7)
BASE COURSE
FLOOR CLEANOUT, ADJUSTABLE,4" DIA ZURN INDUSTRIESMODEL #CO2450-PV4 (OR ENGINEERAPPROVED EQUIVALENT)SEE DETAIL 25/VM-2A
FLUSH WITHFINISHED FLOOR
19
NTSVM-2A
VIMS MONITORING POINT WITH EXTENDED INTAKE PIPE
VAPOR LINER
2" SOLID SCH 40 PVCLENGTH VARIES - REFERTO SHEET VM-1
2" SCH 40 PVC 90-DEGREEELBOW VAPOR LINER PENETRATIONSEALED TO PIPE PERMANUFACTURER INSTRUCTIONS
WALL (VARIES)
PVC VENTEDENDCAP
4" DIA METAL PIPE (VARIES)
PIPE HANGERSUPPORT TO CEILING
PIPE SUPPORT(SPLIT-RING HANGER, OR SIMILAR)
PIPE SUPPORT IN GARAGE (TYP)20
NTSVM-2A
AIR-TIGHT COUPLINGS REQUIREDFOR PIPE CONNECTIONS DURINGEXPOSED-PIPE LENGTHS
MIN 1% SLOPE (1/8" PER FOOT)TOWARD EXTRACTION POINT(SEE SPECIFICATION #4)
VIMS VENTILATOR EXHAUST (TYPICAL)21
NTSVM-2A
4" HEAVY DUTY NO HUB COUPLING STATIONARY VENTILATOR (EMPIREEV04SS VENTILATOR OR ENGINEERAPPROVED EQUIVALENT)4" METAL RISERDUCT PIPETHROUGH ROOF FLASHING
ROOFTOP
VIMS RISER DISCHARGE AT LEVEL 7 OPEN PARKING DECK (TYP)
NTS
22
VM-2A
OPEN AIRPORTION OFPARKING DECKAT LEVEL 7
OPEN AIRABOVEPARKINGDECK
MIN 1% SLOPE TOWARDEXTRACTION POINT
ROOF OFPARKING DECK(LEVEL 7)
PIPE SUPPORTS PER NCBUILDING CODE
SOLID 4" METAL, LENGTHVARIES
WALL (VARIES)
FROM 6TH FLOOR
4" DIA 90-DEGREE METALFLANGED OR THREADEDELBOW (LONG-RADIUS,WHERE POSSIBLE)4" DIA 90-DEGREEMETAL FLANGED ORTHREADED ELBOW(LONG-RADIUS, WHEREPOSSIBLE)
VAPOR INTRUSIONMITIGATION SYSTEM
CROSS-SECTION
DETAILS #12-22NOTES:
VIMS = VAPOR INTRUSION MITIGATION SYSTEMTYP = TYPICALSCH = SCHEDULE
PVC = POLYVINYL CHLORIDENTS = NOT TO SCALEALL PIPE MEASUREMENTS ARE BY DIAMETER
H&H NO. POR-002
VAPOR MITIGATION PLANPREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PROFESSIONAL
APPROVAL2161 HAWKINS2161 HAWKINS STREETCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 23060-19-060DEVELOPER:
PORTMAN RESIDENTIAL305 PEACHTREE CENTER AVE.SUITE 575ATLANTA, GEORGIA 30303
VM-2A
REVISIONS
REV DATE DESCRIPTION
0 5/17/22 DEQ SUBMISSION
1 8/2/22 DEQ COMMENTS
2 5/23/23 VIMP ADDENDUM
DATE: 5-23-23
S:\AAA-Master Projects\Portman Holdings\Hawkins Tower\VIMP Details.dwg, VM-2A, 5/23/2023 11:05:17 AM, amckenzie
0141RESIDENTIALLOBBY0109MAINTELECOMROOM0103GENERATORROOM0110HOUSEKEEPINGOFFICE0113MAINTENANCEOFFICE0112RETAIL EL.ROOM0105MAINTENANCESTORAGE0101TRANSFORMERVAULT0102MAINELECTRICALROOM0104FIRE PUMP,DOMESTICBOOSTERPUMP, &WATERMETERROOM0114LOADINGDOCK0118STORAGE0117F.C.C.0119RESTAURANTSPACE 10122RESTAURANTSPACE 30111HOUSEKEEPINGSTORAGE0123RETAILSPACE 40127RES. STOR.0128RES. STOR.0126RESTAURANTSPACE 70108CORRIDOR0121COFFEESPACE 20142MAIL ROOM0143PACKAGEROOM0130BACKFLOWROOMC0101RESIDENCEELEVATORLOBBY0106BIKESTORAGE0107RESIDENTIALSTORAGEST-04ST-02ST-03ST-010115TRASHCOMPACTOR0149BREAKROOM0148RESTROOM0147STORAGE0146OFFICE0145OFFICE0144LEASING0121DSTORAGE0124RETAILSPACE 50125RETAILSPACE 60131BACKFLOWROOMMP-15MP-14MP-13MP-12MP-5MP-3MP-1MP-6MP-4MP-8MP-10MP-7MP-15MP-11E-2E-3E-4E-5E-7MP-16MP-9MP-2E-1E-6VERTICAL STACKING DIAGRAMNPROJECTNROTHNTRUENORTHLEGENDEXTENT OF VAPOR LINERHORIZONTAL COLLECTION NETWORKSOLID 3-INCH PVCFLOOR PENETRATION LOCATION 4" DIA METAL VERTICAL RISER WITH EXHAUSTIDENTIFICATION NUMBER2" DIA SOLID PVC PRESSURE MONITORING POINT WITH FLUSH-MOUNTED COVERPROPOSED INDOOR AIR SAMPLE LOCATIONPOURBACK AREA (CONCRETE SLAB TO BE POURED AFTER TENANT UPFIT)MP-1E-2VAPOR INTRUSIONMITIGATION SYSTEMSUB-SLAB LAYOUTLEVEL 1H&H NO. POR-002VAPOR MITIGATION PLANPREPARED BY:2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)License # C-1269 / #C-245 GeologyPROFESSIONALAPPROVAL2161 HAWKINS
2161 HAWKINS STREET
CHARLOTTE, NORTH CAROLINA
BROWNFIELDS PROJECT NO. 23060-19-060 DEVELOPER:PORTMAN RESIDENTIAL305 PEACHTREE CENTER AVE.SUITE 575ATLANTA, GEORGIA 30303VM-3VM-3LEVEL 1 PLANPROPOSED SUB-SLABSOIL GAS SAMPLELOCATIONPROPOSED SUB-SLABSOIL GAS SAMPLELOCATIONPROPOSED SUB-SLABSOIL GAS SAMPLELOCATIONPROPOSED SUB-SLABSOIL GAS SAMPLELOCATIONPROPOSED SUB-SLABSOIL GAS SAMPLELOCATIONPROPOSED SUB-SLABSOIL GAS SAMPLELOCATIONPROPOSED SUB-SLABSOIL GAS SAMPLELOCATION3VM-2PROPOSED SUB-SLABSOIL GAS SAMPLELOCATION16VM-2A10VM-215VM-2A14VM-2A16VM-2A16VM-2A5/21VM-2/2A8/21VM-2/2A8/21VM-2/2A5/21VM-2/2A16VM-2A5/21VM-2/2A9VM-26VM-213VM-2A10VM-211VM-21VM-22VM-218VM-2A18VM-2A18VM-2AREVISIONSREVDATEDESCRIPTION05/17/22DEQ SUBMISSION18/2/22DEQ COMMENTS25/23/23VIMP ADDENDUMDATE: 5-23-23S:\AAA-Master Projects\Portman Holdings\Hawkins Tower\VIMP_Update.dwg, vm-3, 5/23/2023 11:06:14 AM, amckenzie
ONE HOUR RATED FIRE BARRIER
RATED WALLS LEGEND
TWO HOUR RATED FIRE BARRIER
THREE HOUR RATED FIRE BARRIER
SMOKE PARTITION
0201
1A1 ANSI
0202
1A2
0203
1A3
0204
2A1
0205
S1A
0206
1B1
0209
S2
0207
S1B
0208
1B2
0210
1C
0211
1D
0212
S3
0213
S4 ANSI
0214
1E1
0215
1F1
0216
1G1
0217
3J1
0218
3K1 ANSI
C0205
VESTIBULE
C0203
ELECT.
ROOM C0201
RESIDENCE
ELEVATOR
LOBBYC0204
TELECOM
ROOM
C0206
FUTURE
RETAIL CU'S
E-1
E-2
E-3
E-4 E-5
E-6
E-7
VERTICAL STACKING DIAGRAM
N
PROJECTNROTH
N
TRUENORTHVM-4 LEVEL 2 PLAN
H&H NO. POR-002
VAPOR MITIGATION PLANPREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PROFESSIONALAPPROVAL2161 HAWKINS2161 HAWKINS STREETCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 23060-19-060DEVELOPER:
PORTMAN RESIDENTIAL
305 PEACHTREE CENTER AVE.SUITE 575
ATLANTA, GEORGIA 30303
VM-4
VAPOR INTRUSION
MITIGATION SYSTEM
VERTICAL RISERLAYOUTLEVEL 2
NOTES:
1.IF NO CEILING PENETRATIONLOCATION SHOWN, THE RISER SHALL
RUN VERTICALLY FROM THE FLOORPENETRATION LOCATION.
LEGEND
FLOOR PENETRATION 4" DIA METAL VERTICAL RISER WITH EXHAUST
IDENTIFICATION NUMBER
4" DIA METAL PIPE HORIZONTAL RUN
CEILING PENETRATION 4" DIA VERTICAL RISER WITH EXHAUSTIDENTIFICATION NUMBER
E-2
E-2
REVISIONS
REV DATE DESCRIPTION
0 5/17/22 DEQ SUBMISSION
1 8/2/22 DEQ COMMENTS
2 5/23/23 VIMP ADDENDUM
DATE: 5-23-23
S:\AAA-Master Projects\Portman Holdings\Hawkins Tower\VIMP_Update.dwg, vm-4, 5/23/2023 11:07:12 AM, amckenzie
ONE HOUR RATED FIRE BARRIER
RATED WALLS LEGEND
TWO HOUR RATED FIRE BARRIER
THREE HOUR RATED FIRE BARRIER
SMOKE PARTITION
0601
1A1 ANSI
0602
1A2
0603
1A3 ALT
0604
2A1 ALT
0605
S1A
0606
1B1
0609
S2
0607
S1B
0608
1B2
0611
1D
0612
S3
0613
S4 ANSI
0614
1E2
0617
3J2
0618
3K2
0610
1C
0615
1F3
0616
1G2
C0606
CONDENSING
UNIT ROOM
C0603
ELECT.
ROOM C0601
RESIDENCE
ELEVATOR
LOBBY
C0604
TELECOMROOM
C0605
VESTIBULE
C0608
CONDENSING
UNIT ROOM
E-1E-2
E-3
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E-6
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VERTICAL STACKING DIAGRAM
N
PROJECTNROTH
N
TRUENORTHVM-5 LEVEL 6 PLAN
H&H NO. POR-002
VAPOR MITIGATION PLANPREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PROFESSIONALAPPROVAL2161 HAWKINS2161 HAWKINS STREETCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 23060-19-060DEVELOPER:
PORTMAN RESIDENTIAL
305 PEACHTREE CENTER AVE.SUITE 575ATLANTA, GEORGIA 30303
VM-5
VAPOR INTRUSION
MITIGATION SYSTEM
VERTICAL RISERLAYOUTLEVEL 6
NOTES:
1.IF NO CEILING PENETRATION
LOCATION SHOWN, THE RISER SHALLRUN VERTICALLY FROM THE FLOORPENETRATION LOCATION.
LEGEND
FLOOR PENETRATION 4" DIA METAL VERTICAL RISER WITH EXHAUSTIDENTIFICATION NUMBER
HORIZONTAL RUN 4" DIA METAL PIPE
CEILING PENETRATION 4" DIA VERTICAL RISER WITH EXHAUSTIDENTIFICATION NUMBER
E-2
E-2
20
VM-2A
20
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PIPE INSTALLED ALONGCEILING OF LEVEL 6
REVISIONS
REV DATE DESCRIPTION
0 5/17/22 DEQ SUBMISSION
1 8/2/22 DEQ COMMENTS
2 5/23/23 VIMP ADDENDUM
DATE: 5-23-23
S:\AAA-Master Projects\Portman Holdings\Hawkins Tower\VIMP_Update.dwg, vm-5, 5/23/2023 11:08:09 AM, amckenzie
ONE HOUR RATED FIRE BARRIERRATED WALLS LEGENDTWO HOUR RATED FIRE BARRIERTHREE HOUR RATED FIRE BARRIERSMOKE PARTITION07201M07041J107061L(1)07071K2(1)07081L(2)07091K2(2)07101K307111Z07122G07141P07151Q107171S07051K107032E07021H07012D07192L0718S507162K107131NC0704ELECT.ROOMC0701RESIDENCEELEVATORLOBBYC0705TELECOMROOM0721PET SPA0720PET SPAVEST.DOG PARKE-4E-7E-6E-7E-5E-3E-2E-1VERTICAL STACKING DIAGRAMNPROJECTNROTHNTRUENORTHVM-5LEVEL 7 PLANH&H NO. POR-002VAPOR MITIGATION PLANPREPARED BY:2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)License # C-1269 / #C-245 GeologyPROFESSIONALAPPROVAL2161 HAWKINS
2161 HAWKINS STREET
CHARLOTTE, NORTH CAROLINA
BROWNFIELDS PROJECT NO. 23060-19-060 DEVELOPER:PORTMAN RESIDENTIAL305 PEACHTREE CENTER AVE.SUITE 575ATLANTA, GEORGIA 30303VM-6VAPOR INTRUSIONMITIGATION SYSTEMVERTICAL RISERLAYOUTLEVEL 7NOTES:1.IF NO CEILING PENETRATIONLOCATION SHOWN, THE RISER SHALLRUN VERTICALLY FROM THE FLOORPENETRATION LOCATION.LEGENDDISCHARGE 4" DIA METAL VERTICAL RISER WITH EXHAUST IDENTIFICATIONNUMBERE-2POSITION DISCHARGE ON LEVEL 7MINIMUM 10' FROM AIR INTAKE ORAREA WITH PUBLIC ACCESSPOSITION DISCHARGE ON LEVEL 7MINIMUM 10' FROM AIR INTAKE ORAREA WITH PUBLIC ACCESSINSTALL ELECTRICAL OUTLETS WITHIN5' OF RISER ON PARKING DECK ROOFFOR POTENTIAL FUTURE ELECTRICFAN21VM-2AINSTALL ELECTRICAL OUTLETS WITHIN5' OF RISER ON PARKING DECK ROOFFOR POTENTIAL FUTURE ELECTRICFANREVISIONSREVDATEDESCRIPTION05/17/22DEQ SUBMISSION18/2/22DEQ COMMENTS25/23/23VIMP ADDENDUMDATE: 5-23-2322VM-2AS:\AAA-Master Projects\Portman Holdings\Hawkins Tower\VIMP_Update.dwg, vm-6, 5/23/2023 11:09:05 AM, amckenzie