22034_Fairey Finishin Pant _VI WP 2020_04_23

VAPOR INTRUSION MITIGATION SYSTEM
PILOT TESTING AND VAPOR SAMPLING
BROWNFIELDS WORK PLAN
DTCC Applied Technologies Building
Brownfields Project Number: 22034-18-32
1604 E. Lawson Street
Durham, Durham County, North Carolina
April 23, 2020
Terracon Project No. 70197104
Prepared for:
North Carolina Department of Environmental Quality
Division of Waste Management
Raleigh, North Carolina
Prepared by:
Terracon Consultants, Inc.
Raleigh, North Carolina

April 23, 2020
North Carolina Department of Environmental Quality
Division of Waste Management — Brownfields Section
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Attn: Brad Atkinson
P: 919-707-8748
E: [e-mail]
Irerracon
Re: Vapor Intrusion Mitigation System Pilot Testing and Vapor Sampling Work Plan
DTCC Applied Technologies Building
Brownfields Project No. 22034-18-32
1604 E. Lawson Street
Durham, Durham County, North Carolina
Terracon Project No. 70197104
Mr. Atkinson,
On behalf of Durham Technical Community College, the Proposed Developer, Terracon Consultants,
Inc. (Terracon) pleased to submit this Work Plan for the above referenced site.—erracon
�teta•zr
appreciates the opportunity to present this work plan to the NC
,gr A#- rogram. Should you
have any questions or require additional information, please,ai�,Q ��yNtntact our office.
Sincerely,
Terracon Consultants, Inc.
Analee L. Farrell, El
Staff Environmental Engineer
SEAL
i
Donald R. Malone, PE
Senior Environmental Engineer
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 Terracon Project No. 70197104
Table of Contents
1.0 PROJECT INFORMATION...................................................................................1
1.1 Site Description..............................................................................................................................1
1.2 Site History .....................................................................................................................................1
1.3 Site Investigation History ..............................................................................................................1
1.4 VIMS Design Overview..................................................................................................................2
1.5 Purpose and Objectives................................................................................................................2
2.0 SAMPLE POINT INSTALLATION.........................................................................2
3.0 VIMS PILOT TEST................................................................................................ 3
4.0 VAPOR SAMPLING..............................................................................................3
4.1 Monitoring Plan..............................................................................................................................3
4.2 Sub -Membrane Soil Vapor Sampling...........................................................................................4
4.3 Building Survey and Pre -Sampling Evaluation...........................................................................5
4.4 Indoor Air Sampling....................................................................................................................... 6
4.5 Sample Custody, Packaging, and Shipment............................................................................... 6
5.0 DATA MANAGEMENT, EVALUATION AND REPORTING .................................. 7
5.1 Field Records..................................................................................................................................7
5.2 Sample Designation.......................................................................................................................7
5.3 Pilot Test Report............................................................................................................................ 7
5.4 Sub -Membrane Sampling Reports...............................................................................................7
6.0 SCHEDULE...........................................................................................................8
7.0 REFERENCES......................................................................................................8
ATTACHMENTS
Exhibit 1 — Site Layout
Appendix A — VIMS Design Submittal
Appendix B — Soil Vapor Set -Up
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 Terracon Project No. 70197104
1.0 PROJECT INFORMATION
1.1 Site Description
The site comprises a 4.3-acre portion of a larger parcel located at 1604 E. Lawson Street in
Durham, North Carolina. Durham Technical Community College (DTCC) owns the site. It is
currently under construction with the Applied Technologies Building and associated parking lot
development. Terracon understands that current development plans include one educational
building and a surface parking lot. The building will be two -stories with an approximately 20,500-
square foot footprint. It will be supported concrete support column footings.
The site has impacts to soil and soil vapor. The site layout is shown on Exhibit 1.
In response to the existing contamination and planned redevelopment, DTCC entered the site into
the North Carolina Brownfields Program (NCBP). The Brownfields Application was submitted for the
site on April 24, 2018 and the Letter of Eligibility was received from the North Carolina Department
of Environmental Quality (NCDEQ) on October 25, 2018. The site is identified by NCBP project
number 22034-18-32.
1.2 Site History
The site was reportedly occupied by the Fairey Hosiery Finishing Mill from approximately 1964 to
2005 with structures constructed in 1964 and the late 1970s. By the late 2010s, the mill facilitywas
converted into a warehouse utilized byAllpack Assembly Inc., which was a packaging and shipping
company. A former 1,000-gallon heating oil underground storage tank was removed from the site in
2001 and the on -site structures were demolished in 2015. Typical hosiery finishing mill operations
potentially included bleaching, dyeing, finishing, printing, shrinking, and application of chemicals to
fabrics.
1.3 Site Investigation History
Terracon conducted the following environmental investigations conducted at the site:
■ Phase I Environmental Site Assessment, dated August 11, 2017 (Terracon, 2017);
■ Limited Site Investigation, dated August 14, 2018 (Terracon, 2018);
■ Brownfields Data Gap Assessment Report, dated May 7, 2019 (Terracon, 2019).
Analytical results from prior soil and groundwater sampling events conducted on the site did not
detect volatile organic compounds (VOCs) or semi -volatile organic compounds (SVOCs) above the
NCDEQ Inactive Hazardous Sites Branch (IHSB) Unrestricted Use Preliminary Soil Remediation
Goals (PSRGs) or the North Carolina Administrative Code 2L Groundwater Standards (Terracon,
2018).
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 Terracon Project No. 70197104
In soil samples collected from areas of proposed cut from site development, hexavalent chromium
was detected above its IHSB Unrestricted -Use PSRG standard of 0.31 mg/kg (Terracon 2019).
Arsenic was detected in the soil samples above its IHSB Unrestricted Use PSRG; however, arsenic
concentrations were consistent with what is expected from naturally -occurring conditions based on
the low magnitude of concentrations, narrow concentration range, and frequency of detections
(Terracon, 2018).
Thirty four VOCs were detected within soil vapor at the site (Terracon, 2018). Six VOCs (benzene;
1,3-butadiene; ethylbenzene; trichloroethene [TCE]; 1,2,4-trimethyl benzene; and m&p xylenes) were
detected at concentrations above the NCDEQ Division of Waste Management (DWM) Residential
Vapor Intrusion Soil Gas Screening Levels (VI-SGSLs). Terracon entered the highest detected
concentration of each compound into the NCDEQ Risk Calculator. Carcinogenic risk associated with
the soil gas to indoor air exposure pathway was calculated to be 2.2 x 10-4 with a hazard index of
9.8, which exceeded the acceptable risk criteria for residential receptors.
Based on the results of the investigations and at the request of NCDEQ, a vapor intrusion mitigation
system (VIMS) was designed and is currently being installed beneath the building (Terracon, 2020).
1.4 VIMS Design Overview
In accordance with the previously submitted VIMS Design Submittal (Appendix A), the VIMS
includes an active mitigation system beneath the ground level consisting of a network of horizontal
slotted poly -vinyl chloride (PVC) piping installed in gravel lined trenches beneath a 4-inch thick layer
of sub -slab gravel. The VIMS system will be installed to reduce the potential for vapor intrusion into
the building space. Vapor extraction will be accomplished through a sufficient vacuum induced in
sub -membrane vapor collection laterals by a vacuum blower and PVC vapor riser piping. Collected
vapor from beneath the membrane will discharge through exhaust stacks above the building roof.
1.5 Purpose and Objectives
The purpose of the work plan is to describe sub -membrane sample point installation and sampling
as well as VIMS pilot testing. If required by NCDEQ at a later date, this work plan also includes
procedures for a pre -occupancy indoor air sampling event for the building.
2.0 SAMPLE POINT INSTALLATION
As previously outlined in the VIMS Design Submittal, concurrent with the installation of VIMS piping,
sub -slab vacuum monitoring points and vapor sampling points will be installed in the slab. Six
vacuum monitoring points will be installed in building, which will also serve as sub -membrane vapor
sampling points.
The points will be constructed within a 1-1/4-inch diameter High -Density Polyethylene (HDPE)
sleeve extending from the aggregate layer to the top of the slab surface. The points are constructed
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 Terracon Project No. 70197104
with 5/8-inch threaded rod approximately 12-1/3 inch in length extending approximately 2-inches into
the subgrade, through an approximate 4-inch aggregate layer, 30-millimeter thick membrane, and 4-
inch slab. A 2-inch long, 1/2-inch diameter Vapor Pin° barb with a 5/8-inch neoprene seal is
inserted into the 1-1/4-inch diameter sleeve after removal of the threaded rod. During installation of
the aggregate layer, a 5/8-inch threaded rod will be installed extending from the native soil through
the aggregate base and VMS membrane to above the proposed slab surface. The threaded rod will
be removed after completion of the VMS membrane, associated smoke testing, and slab installation.
A 1/2-inch diameter stainless steel Vapor Pin° will be installed in the HDPE sleeve with a neoprene
seal. The sampling point will be covered with an air -tight plastic cap.
Installation of the threaded rod, HDPE sleeve, stainless steel Vapor Pin° and associated neoprene
seal will be documented in field notes. See the attached VIMS Design submittal for additional
details (Terracon, 2020).
3.0 VIMS PILOT TEST
Following installation of the slab in the building but before the building is enclosed, Terracon will
conduct pilot testing of the vent pipe network. A vapor extraction fan will be attached to a vertical
riser pipe and the other riser pipes will be capped. Fans will be added to one riser pipe at a time.
The vapor sampling points will be utilized as vacuum monitoring points. Each point will be capped
when not being used for measurements. Prior to beginning the test, vacuum measurements will be
collected at each sampling point. After the base line condition is recorded, the fan will be turned on
and an anemometer will be used periodically to measure the velocity of the air exiting the blower
exhaust. A manometer with units of pascals will be utilized to periodically record differential
pressures at the sample ports. The air flow measurements at each fan location, and the vacuum
measurements from each sample port will be recorded and reported to NCDEQ. A pressure
differential resulting in depressurization below the slab of 4 pascals or greater within the monitoring
points is considered sufficiently depressurized. The testing will run for an approximately 60-minute
period.
4.0 VAPOR SAMPLING
As stated above, six permanent vacuum monitoring points will be installed within the building
footprint, which double as sub -membrane vapor sampling points.
4.1 Monitoring Plan
Terracon proposes completion of a single sub -membrane vapor sampling event consisting of
sampling the six points following the installation of the VIMS. We propose the sampling event will
be completed at least 30 days after pouring of the concrete slab, but prior to completion of the
building interior. Results of the sub -membrane vapor testing activities will be entered into the
NCDEQ Risk Calculator. The building will be treated as an individual exposure unit.
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 Terracon Project No. 70197104
The following sections detail the proposed approach and methods for collection of sub -membrane
soil vapor from the site and, if required at a later date, indoor air sampling.
4.2 Sub -Membrane Soil Vapor Sampling
Soil vapor samples will be collected using an inline purge/sampling train consisting of a
batch -certified 1-liter Summa canister for sample collection (sample canister) connected to a critical
orifice flow restrictor (flow controller).
Shut -In Test
Prior to connection of the sampling train to the sample point, a shut-in (dead -head) test will be
conducted to check for leaks in the above -ground purge/sampling manifold. The sampling train
influent will be capped, the sampling canister will remain closed, and a hand pump will be used to
generate a negative pressure reading of at least 15 inches of mercury on the sampling train
pressure gauge. If there is an observable loss of vacuum, the fittings will be adjusted until the
vacuum in the sample train does not noticeably dissipate. Shut-in test methods are depicted on the
soil vapor sampling guide in Appendix B.
Helium Tracer Test
Following the shut-in test, the purge/sampling manifold will be connected to the sub -membrane soil
vapor sampling point and a Helium tracer gas leak test will be conducted. The tracer gas serves as
a quality assurance/quality control method to verify the integrity of the seal of sampling train to the
sample point. An MGD-2002helium detector (or equivalent) will be used to verify the presence and
concentration of tracer gas.
The protocol for using a tracer gas is to enclose the sampling train and sample point outlet with a
shroud, enrich the shroud atmosphere with at least 10 percent helium. The purging device (a syringe
or peristaltic pump) will be situated inside of the shroud connected to the sampling train with an in -
line backflow preventer by Nylaflow° lined tubing. A minimum of three volumes will be evacuated
from the sample point using the purge device. Purged soil gas will be directed to a tedlar bag at the
end of each purge volume. Purged soil gas in the tedlar bag will then be screened for helium to
assess for leaks in the sampling point seal and with a photoionization detector (PID) (ppbRAE 3000
or equivalent) to assess for VOCs. The shroud helium concentration and the helium concentration in
the purged soil vapor will be documented after each volume purged.
One purge volume will include the volume of the 5/8-inch previously removed threaded rod insert
minus the Vapor Pin° and neoprene seal volume. Based on this construction, one purge volume is
calculated at approximately 300-400 milliliters (mL); therefore, at least 900-1200 mL (approximately
3 purge volumes) will be evacuated from the sample point prior to sample collection. Terracon will
adjust the required purge volume for each sample as needed based on the as -built construction of
each Vapor Pin°.
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 Terracon Project No. 70197104
Sample collection will begin if the tracer testing indicates helium concentrations in the vapor point
are less than or equal to 10 percent of the helium concentration in the shroud, indicating a
sufficiently sealed vapor point annulus. A photograph of the shroud and sampling set-up at each
sample location will be included as the appendix of the reports discussed in Sections 5.3 and 5.4.
Sample Collection
Following the helium leak test, the valve to the purge device will be closed and the sample canister
valve will be opened to collect soil vapor for laboratory analysis. The sample will be collected at a
flow rate less than or equal to 200 mL per minute. The sample canister valve will be closed when the
gauge measures less than 6 inches of mercury (Hg) vacuum (i.e., when sampling is complete). The
final vacuum will not be allowed to reach 0 inches Hg vacuum.
The analytical laboratory will be contacted in advance of the soil vapor sampling event to ensure that
they will record the vacuum in the sample canister prior to analysis. The sampler will also ask the lab
to record the canister vacuum measurements in the "Notes" section on the chain -of -custody form for
the canisters. The laboratory vacuum readings will be compared to the post -sampling vacuums
recorded in the field notes.
The samples will be analyzed for VOCs per U.S. Environmental Protection Agency Method TO-15.
The laboratory reporting limits for TO-15 compounds will be compared to the NCDEQ Soil Gas
Screening Levels to make sure the reporting limits are below the screening levels to the extent
practical.
4.3 Building Survey and Pre -Sampling Evaluation
If needed based on the results of sub -membrane sampling, subsequent sampling events may
include indoor air sampling. Terracon will conduct a survey to document site conditions at the time of
sampling. The following will be noted and summarized in the final report:
The location of the HVAC system and outdoor air intake, if present.
Areas that may create over- or under- pressurization in the building such as vent
hoods, fans, and attic vents.
Meteorological data such as recent precipitation, changes in barometric pressure,
wind speed, temperature, and humidity.
Chemical storage related to the current site operations.
For monitoring events with proposed indoor air sampling, Terracon will also screen indoor air in the
vicinity of proposed sample locations with a parts per billion -level PID to screen for potential VOC
sources. Terracon will request the safety data sheets (SDS) from the Proposed Developer for
materials used in construction and will be included in the sampling reports.
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 Terracon Project No. 70197104
4.4 Indoor Air Sampling
If needed based on the results of sub -membrane sampling, Terracon will collect indoor air samples
and one ambient outdoor (background) sample. The number and locations of samples will be
determined in the future, after consultation and approval from NCDEQ. The indoor air samples will
be collected using individually certified 6-L Summa° canister(s) placed within the human breathing
zone (3 to 5 feet above floor level). The outdoor air sample will be collected using a 6-L Summa°
canister upwind of the site to provide a comparison between outdoor and indoor air. The canisters
will be obtained from a certified laboratory, certified clean, fitted with a vacuum gauge, and under a
vacuum of 25 to 30 inches of Hg. A photograph of the summa canister at each sample location will
be included as the appendix of the report discussed in Section 5.3. The canisters will be fitted with
calibrated flow -controllers to collect samples over a duration of approximately 8 hours. The vacuum
of the canister will be recorded during sample collection. The sample canister valve will be closed
when the gauge measures less than 6 inches of Hg vacuum (i.e., sampling is complete). The final
vacuum will not be allowed to reach 0 inches Hg vacuum. A table of sample canister vacuums
during sample collection will be included in the report.
The analytical laboratory will be contacted in advance of the sampling event to ensure that they will
record the vacuum in the sample canister prior to analysis. The sampler will also ask the lab to record
the canister vacuum measurements in the "Notes" section on the chain -of -custody form for the
canisters. The laboratory vacuum readings will be compared to the post -sampling vacuums recorded
in the field notes.
The indoor and outdoor air samples will be analyzed for a short-list of VOCs to be determined based
on results of sub -membrane sampling. The short-list of compounds will be submitted for approval to
the NCBP prior to indoor air sampling. Terracon will contact the laboratory and NCDEQ prior to
sampling to discuss analytical methods to attain reporting limits below the screening levels, if
possible.
4.5 Sample Custody, Packaging, and Shipment
Sample custody procedures shall be performed to document preparation, handling, storage, and
shipping of all samples collected during the project. The samples to be collected from the site will
be in the control of authorized personnel from the time of collection and receipt by the laboratory,
and their derived data are provided to Terracon. During sample collection, the summa canisters will
be observed by Terracon staff and/or access to the samples will be restricted. Chain -of -custody
forms will be completed and will accompany the samples.
Summa canisters will be placed into plastic shipping crates or cardboard boxes and sealed with
signed and dated custody seals. They will be shipped to the laboratory at ambient temperature.
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 ■ Terracon Project No. 70197104
5.0 DATA MANAGEMENT, EVALUATION AND REPORTING
5.1 Field Records
Documentation of the field records such as sampling logs will be kept for the field investigation,
along with a collection of documents generated in the field (e.g., shipping records). At the
completion of the field investigation, the field logs will be scanned and maintained electronically in a
project folder, as well as included as an appendix in the report.
5.2 Sample Designation
Each field sample will be assigned a unique sample identifier. Codes used to identify re -analyzed
samples and samples re -analyzed at a secondary dilution will be appended by the laboratory and
included in all laboratory deliverables. The sample identifier will be shown on the chain -of -custody
form and sample container labels and tags. The sample identifier will be linked to a sample location
name that includes an indication of depth in field notebooks.
5.3 Pilot Test Report
Terracon will prepare a letter report summarizing the results of the pilot testing activities. The report
will be submitted to the NCBP.
5.4 Sub -Membrane Sampling Reports
Upon completion of each pre -occupancy sampling event and following receipt of the laboratory
analytical results, a letter report summarizing sample results will be prepared that will include the
following items:
Documentation of field activities;
Site plan showing pertinent site features;
Analytical laboratory results;
Risk Calculator; and
SDS for materials used in building construction.
Laboratory results will be presented in a table showing detected compounds and comparisons to the
Residential and Commercial/Industrial VI-SGSLs. Terracon will also enter the results into the
NCDEQ Risk Calculator with the building assessed as an individual exposure unit. Method detection
limits will be shown for compounds not detected. The report will be stamped by a professional
engineer or professional geologist. The report will be submitted for review and approval to the
NCBP.
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VIMS Pilot Testing and Vapor Sampling Work Plan Irerracon
DTCC Applied Technologies Building Durham, NC
April 23, 2020 ■ Terracon Project No. 70197104
6.0 SCHEDULE
Terracon is prepared to commence preliminary pre -occupancy vapor sampling at least 30-days after
the pouring of the concrete slabs but prior to completion of the building interior. Letter reports for
pre -occupancy sampling events will be available within 2-3 weeks after receipt of the laboratory
analytical data.
7.0 REFERENCES
NCDEQ Division of Waste Management, 2018. Vapor Intrusion Guidance Document. March.
NCDEQ, 2019. NCDEQ Risk Calculator User Guide. May.
Terracon Consultants, Inc. (Terracon), 2017. Phase I Environmental Site Assessment. Proposed
Newton Hall Expansion: 1604 East Lawson Street, Durham, Durham County, North Carolina.
August 11.
Terracon, 2018. Limited Site Investigation. Proposed Newton Hall Expansion: 1604 East Lawson
Street, Durham, Durham County, North Carolina. August 14.
Terracon, 2019. Brownfields Data Gap Assessment Report. Fairey Finishing Mill: 1604 East Lawson
Street, Durham, Durham County, North Carolina. May 7.
Terracon, 2020. VIMS Design Submittal: Fairey Finishing Plant, Brownfields Project Number:
22034-18-32, Durham, North Carolina. Terracon Project No. 70197104. February 28.
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EXHIBIT

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Note: The underlaid figure is the preliminary grading plan for site redevelopment (New (Newton Hall) 50
Applied Technology Building, 50% CD Submission - Vol. 2 of 4 Drawings, O'Brien/Atkins
Associates, PA., dated January 28, 2019) Feet
PM; Project No.
ALF 70197104
Drawn By: Scale:
ALF 1 in = 100 ft
Checked By: File Path:
DRM 70197104
Approved BybRM Date: 4/21/2020
Site Layout
EXHIBIT
NO.
Irerracon
Fairey Finishing Plant
Brownfield Project Number: 22034-18-32
1604 East Lawson Street
Durham, North Carolina
2401 Brentwood Drive, Suite 107 Raleigh, NC 27504
Phone: [phone] Fax: [phone]

APPENDIX A
VIMS DESIGN SUBMITTAL

Vapor Intrusion Mitigation Design Submittal
Fairey Finishing Plant
Brownfields Project ID: 22034-18-32
1604 E. Lawson Street
Durham, Durham County, North Carolina
Terracon Project No. 70197104
February 28, 2020
Prepared for:
North Carolina Department of Environmental Quality
Division of Waste Management
Raleigh, North Carolina
Prepared by:
Terracon Consultants, Inc.
Raleigh, North Carolina

February 28, 2020
NCDEQ — Brownfields Program
217 West Jones Street
Raleigh, NC 27603
Attn: Ms. Brad Atkinson
P: 919-707-8748
E: [e-mail]
Re: Vapor Intrusion Mitigation Design Submittal
Fairey Finishing Plant
Brownfields Project ID: 22034-18-32
1604 E. Lawson Street
Durham, Durham County, North Carolina
Terracon Project No. 70197104
Mr. Atkinson:
1rerracon
On behalf of Durham Technical Community College (i.e. the Proposed Developer), Terracon
Consultants, Inc. is pleased to submit this VIMS Design Submittal for the above referenced site.
If you have any questions concerning this report or need additional information, please contact us at
919-873-2211.
Sincerely,
Terracon Consultants, Inc.
Analee L. Farrell, El
Staff Engineer
Attachments
1
Donald R. Malone, PE
Senior Engineer
Terracon Consultants Inc. 2401 Brentwood Rd, Ste 107 Raleigh; NC 27604-3686
P 919-873-2211 F 919-873-9555 terracon.com

TABLE OF CONTENTS
Page No.
1.0 Introduction....................................................................................................................................1
2.0 Design Basis...................................................................................................................................1
3.0 Quality Assurance / Quality Control............................................................................................ 2
4.0 Post -Construction / Pre -Occupancy System Effectiveness Testing........................................2
5.0 Post -Occupancy Testing...............................................................................................................2
6.0 Future Tenants & Building Uses.................................................................................................. 3
7.0 Reporting........................................................................................................................................ 3
8.0 Design Submittal Exhibits.............................................................................................................3
APPENDICES
APPENDIX A VIMS Design
APPENDIX B GEO-SEAL° Specifications

Fairey Finishing Plant Brownfield Site Irerracon
22034-18-32 Durham, North Carolina
February 28, 2020 Terracon Project No. 70197104
1.0 INTRODUCTION
Terracon Consultants Inc. (Terracon) prepared this Vapor Intrusion Mitigation System (VIMS)
design for installation at the Fairey Finishing Plant site located at 1604 E. Lawson Street in
Durham, North Carolina. The site will be redeveloped with an educational building, known as the
Applied Technologies Building for Durham Technical Community College. The proposed building
will be two -stories and include a 20,467-square foot ground floor with a foundation consisting of
concrete column footings.
The results of previous soil gas sampling were entered into the NCDEQ Brownfields Program
Risk Calculator for Soil Gas to Indoor Air Pathways. The Risk Calculator indicates a human -health
risk for the resident exposure scenarios for the proposed on -site educational building. The
NCDEQ Risk Calculator indicates the existing soil vapor concentrations detected at the site
exceed the acceptable risk level for unrestricted use. To decrease the risk of vapor intrusion, the
VIMS was designed to be installed beneath the proposed building. Additionally, in locations within
the ground -level footprint where potential conduits may be present (i.e. elevator shafts), the VIMS
will also be installed. The proposed site layout is presented in the attached design (Appendix A).
2.0 DESIGN BASIS
The VIMS design will be used to guide construction of the mitigation system. The VIMS includes
installation of a 60-mil dry thickness spray applied vapor barrier liner beneath ground level
portions of the proposed building. The technical specifications and manufacturer installation
instructions are included in Appendix B. Sub -slab venting construction materials and membrane
vapor barrier construction materials are included with installation specifications on the VIMS
design in Appendix A.
To the extent practical, contaminants of concern (COCs) (i.e. benzene, 1,3-butadiene,
ethylbenzene, trichloroethene (TCE), 1,2,4-trimethyl benzene, and xylenes) will not be present in
the building materials. Safety data sheets (SDS) will be requested by the general contractor from
the project contractors to document materials used in construction as well as items associated
with the VIMS once they are selected. SDSs will be included as an appendix to the sampling
workplan.
The VIMS includes an active mitigation system beneath the ground level occupied spaces to
reduce the potential for vapor intrusion into the building space. Vapor extraction will be
accomplished using roof mounted vacuum blowers and poly -vinyl chloride (PVC) riser piping
which will collect vapor from beneath the membrane and discharge the vapor through exhaust
stacks above the building roof. Piping will be labeled at intervals of less than 10 linear feet. A
minimum of 4-inch think aggregate base layer below the sub -slab will increase the effectiveness
of the sub -slab vapor transmission. The vacuum blowers will have an alarm system installed to
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Fairey Finishing Plant Brownfield Site Irerracon
22034-18-32 Durham, North Carolina
February 28, 2020 Terracon Project No. 70197104
monitor the pressure and blower control. The VIMS will include sub -membrane monitoring points
with specifications and locations included on the VIMS design in Appendix A. Sample collection
of sub -slab vapor and/or indoor air for chemical analysis is not planned for the site at this time.
3.0 QUALITY ASSURANCE / QUALITY CONTROL
For quality assurance and quality control (QA/QC) purposes, Terracon will observe the VIMS
installation activities will be made at various stages during construction. The inspections will be
performed on the aggregate base, sub -membrane sampling points, passive vent piping
installation, vapor barrier installation, vertical riser piping, and fan installations. The inspections
will be performed under the supervision of the design professional engineer (PE). The inspections
will include field logs and photographs. When possible, NCDEQ Brownfields Program will be given
a 48-hour notice prior to conducting the inspections on the site.
Smoke testing and thickness coupon measurements will be conducted following the vapor barrier
installation and documented with field logs and photographs. Terracon will submit the inspection
documentation, smoke testing documentation, and coupon testing documentation to NCDEQ.
4.0 POST -CONSTRUCTION / PRE -OCCUPANCY SYSTEM
EFFECTIVENESS TESTING
Following installation of the VIMS piping, vapor barrier, and concrete slab, but prior to building
occupancy, Terracon will conduct influence testing on the piping network. Pressure testing will
offer evidence that the piping network is providing sufficient vacuum influence below the slab. For
the pilot influence test, a variable speed vapor extraction fan will be attached to select vertical
risers. The vacuum and air flow at varying speeds will be measured at the extraction fan location,
and pressure readings will be collected at measuring points located below the membrane. The
results of the pilot influence test will be submitted to NCDEQ. A sub -membrane analytical testing
is not planned for the site at this time.
5.0 POST -OCCUPANCY TESTING
The proposed VIMS design is an active system. Post -occupancy pressure testing will be
conducted once building construction is complete on a monthly basis and submitted to the
Brownfields manager on a quarterly basis.
The frequency of future pressure testing will be evaluated after 1 year. The testing protocol and
sampling details will be included in a workplan submitted under separate cover.
Post -construction soil vapor sampling is not warranted. Testing protocols and triggers for
additional testing will be detailed in a workplan submitted under separate cover.
Responsive ■ Resourceful ■ Reliable 2

Fairey Finishing Plant Brownfield Site Irerracon
22034-18-32 Durham, North Carolina
February 28, 2020 ■ Terracon Project No. 70197104
6.0 FUTURE TENANTS & BUILDING USES
The future building use will be an educational building, primarily utilized by college students and
staff, with associated parking areas. After occupancy, the on -site facilities department will
maintain the VIMS piping and vacuum blowers per the Brownfields Agreement.
For building renovations or if VIMS components are exposed or damaged, the property
management will need to contact a North Carolina Professional Engineer (PE) to oversee and/or
inspect the VIMS repair activities. A report will be submitted to NCDEQ detailing the repairs or
alterations to the VIMS.
7.0 REPORTING
Upon completion of post -construction testing, Terracon will prepare and submit a report to
NCDEQ, under the direct supervision of a North Carolina licensed PE. The report will summarize
the following:
■ Summary of VIMS installation;
■ QA/QC measures;
■ Post -construction effectiveness testing; and
■ An opinion of the VIMS design.
The appendix portion of the report will include as -built drawings, inspection logs with photographs
and field logs, and relevant SDS. Sub -membrane sampling results will be submitted under
separate cover than the post -construction testing report.
8.0 DESIGN SUBMITTAL EXHIBITS
Design drawings are provided in Appendix A.
Design specifications are provided in Appendix A and Appendix B.
Responsive ■ Resourceful ■ Reliable 3

APPENDIX A

PLANS & SPECIFICATIONS FOR
ACTIVE VAPOR MITIGATION SYSTEM
DURHAM TECHNICAL COMMUNITY COLLEGE
NEW APPLIED TECHNOLOGIES BUILDING
1fiO4 EAST LAWSON STREET
DURHAM, NORTH CAROLINA
FIT
INDEX OF SHEETS
VMS-1 TITLE SHEET AND GENERAL NOTES
VMS-1.1 GENERAL NOTES -ROOF MOUNTED
REGENERATIVE BLOWER SYSTEM
VMS-2 VAPOR MITIGATION SYSTEM PLAN
VMS-3 VAPOR MITIGATION SYSTEM DETAILS
VMS4 FIRST FLOOR LAYOUT WITH VENT RISERS
VMS-5 ROOF RISER TRANSITION LAYOUT
NOTICE FOR CONTRACTOR
ALL CONTRACTORS AND SUBCONTRACTORS
PERFORMING WORK SHOWN ON OR RELATED TO
THESE PLANS SHALL CONDUCT THEIR OPERATIONS
SO THAT ALL EMPLOYEES ARE PROVIDED A SAFE
PLACE TO WORK AND THE PUBLIC IS PROTECTED.
ALL CONTRACTORS AND SUBCONTRACTORS SHALL
COMPLY WITH THE 'OCCUPATIONAL SAFETY AND
HEALTH REGULATIONS' OF THE U.S. DEPARTMENT
OF LABOR AND ALL LOCAL AND STATE
REGULATIONS.
NOTES 2. THE UPPER SURFACE OF THE VMS MEMBRANE SHALL BE PROTECTED BY A MANUFACTURER APPROVED PROTECTIVE 5. THE VMS MEMBRANE SHALL BE INSTALLED BEFORE PLACEMENT OF REINFORCING STEEL. IF REINFORCING STEEL IS PRESENT 6. THE PENETRATION SHALL BE WRAPPED WITH A POLYPROPYLENE CABLE TIE AT A POINT 2 INCHES ABOVE THE BASE OF THE
APPLICABILITY GEOTEXTILE LAYER, PLACED BETWEEN THE FLOOR SLAB AND THE MEMBRANE AS SPECIFIED ON THESE PLANS. THE AT THE TIME OF APPLICATION, ALL EXPOSED REINFORCEMENT SHALL BE MASKED BY THE FOUNDATION SUBCONTRACTOR PENETRATION. THE CABLE TIE SHALL BE TIGHTENED FIRMLY SO AS TO SQUEEZE THE CURED MEMBRANE COLLAR, BUT NOT
A. GENERAL PROTECTIVE LAYER IS INSTALLED AFTER THE APPLICATION,WRING, AND TESTING OF THE ASPHALTIC MEMBRANE. PRIOR TO APPLICATION OF THE ASPHALTIC LAVER. TOO TIGHT TO SLICE INTO THE FINISHED SEAL (SEE DETAIL 3, SHEET VMS-3) . THE CABLE TIE MAY BE INSTALLED IMMEDIATELY
1. AN ACTIVE VAPOR MITIGATION SYSTEM (VMS) SHALL BE INSTALLED AND WILL INCLUDE A 60 MIL DRY THICKNESS APPLICATION AFTER THE GEOTEXTILE LAYER COLLAR HAS BEEN INSTALLED.
OF SPRAY -APPLIED ASPHALTIC MEMBRANE UNDERLAIN BY A GAS VENT SYSTEM VENTED AT THE ROOF B.3 SPRAY -APPLIED ASPHALTIC MEMBRANE 6. REINFORCING STEEL, PIPING, FORMS, ETC. SHALL NOT BEAR DIRECTLY ON THE MEMBRANE OR PROTECTIVE LAYER AND
1. THE VMS MEMBRANE SHALL CONSIST OF A SPRAY -APPLIED, SINGLE COURSE, HIGH BUILD, POLYMER MODIFIED ASPHALT EQUIPMENT SHANOT DRIVEN OVER THE MEMBRANE OR ITS PROTECTIVE LAYER WITHOUT PRIOR APPROVAL FROM THE H. INSPECTIONS
2. VMS DETAILS PRESENTED IN THESE PLANS AND SPECIFICATIONS SHALL BE UTILIZED IN THE CONSTRUCTION OF THE BUILDING LL BE VMS DESIGNER AND MANUFACTURER.
DESIGNATED ON SHEETS VMS -I THROUGH VMSb. THE BASIS OF DESIGN IS A SPRAY -APPLIED MEMBRANE MANUFACTURED BY
EMULSION OR EQUIVALENT AS APPROVED BY THE VMS DESIGNER. THE MEMBRANE SHALL HAVE A MINIMUM CURED (DRY)
L THE INSPECTION OF ALL VAPOR CONTROL MEASURES SHALL BE PERFORMED BY THE VMS DESIGNER AT A MINIMUM,
'GEOSEALAND ANY ASSOCIATED VENTING MATERIALS AS DESCRIBED IN THESE PLANS. REFERENCE TO THESE PRODUCTS
THICKNESS OF 60 MIL AND SHALL BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER'S SPECIFICATIONS UNLESS
ARE PROVIDD ED TO DESCRIBE THE SYSTEM AND MATERIALS ONLY AND MAY BE SUBSTITUTED FOR EQUIVALENT PRODUCTS IF
OTHERWISE SPECIFIED AND APPROVED BY THE VMS DESIGNER.
). STAKES USED TO SECURE THE CONCREIE FORMS SHANOT PENETRATE THE VMS MEMBRANE AFTER IT HAS BE
LL ENBEEN
INSTALLED. IF STAKES NEED TO PUNCTURE THE MEMBRANE AFTER R HAS BEEN INSTALLED, THE VMS DESIGNER AND
INSPECTION SHALL TAKE PLACE ATTHE FOLLOWING STAGES OF THE INSTALLATION:
OW
APPROVED BY THE VMS DESIGNER.
2. THE VMS MEMBRANE SHALL BE PLACED BENEATH THE FLOOR SLAB, FOOTINGS, AND TRENCHES IN ACCORDANCE WITH THESE
INSTALLER SHOULD BE NOTIFIED, AND NECESSARY REPAIRS NEED TO BE MADE BY THE VMS SUBCONTRACTOR.
AFTER THE INSTALLATION OF VAPOR COLLECTION PIPING AND PRIOR TO INSTALLATION OF THE AGGREGATE LAYER
' GEOSEALdC PRODUCTS: EPRO SERVICES, INC. (EPRO): P.O. BOX 34]; KS 6)03)TEL [phone],'WW4Y.EPROINC.COM
PI ANSAND DETAILS. THE VMS MEMBRANE SHALL NOT SE PLACED ON TOP OFANY CONCRETE PIERS OR EXTENDED REPAR.
ABOVE THE VENT PIPING:
�
B. FIEND SITUATIONS NOT SPECIALLY DETAILED SHALL BE HANDLED PER THE INTENT OF THESE PLANS AND SPECIFICATIONS WITH
. DURING THE INSTALLATION OF T HE VMS BASE LAYER AND WATERPROOFING MATERIELS IN THE VICINITY OF THE
3. THE VMS MEMBRANE WILL ALSO SERVE AS A MOISTURE MEMBRANE AND WILL REPLACE MY VAPOR OR MOISTURE BARRIER
3, SEAMS SHALL BE OVERLAPPED A MINIMUM OF fi INCHES AND SEALED IN ACCORDANCE WITH THE SPECIFICATIONS SET FORM
THE APPROVAL OF THE VMS DESIGNER THE APPLICATOR /CONTRACTOR MAY SUBMIT SHOP DRAWINGS FOR ALTERNATIVE
ELEVATOR;
SPECIFIED IN THE STRUCTURAL DETAILS. INSTALLATION OF A MOISTURE OR VAPOR BARRIER BETWEEN THE VMS MEMBRANE
IN THESE PLAITS (SEE DETAIL S. SHEET VMS3).
METHODS. SEE STRUCTURAL FOUNDATION PLANS FOR COMPLETE DEPTHS AND DETAILS OF FOOTING. DEPTHS OF FOOTINGS
• PERIODICALLY DURING THE INSTALLATION OF TIE BASE LAYER;
AND BUILDING FLOOR SLAB MAY VOID ME WARRANTY PROVIDED BY THE VMS MEMBRANE MANUFACTURER
SHOWN IN THESE PLANS ARE GENERALIZED, ACTUAL FOOTING DEPTHS MAY VARY.
DURING THE SPRAY APPLICATION OF THE ASPHALTIC LAVER
SA PENETRATION SEALS
. DURING SMOKE TESTING,
B. SYSTEM COMPONENTS
9. APPROPRIATE CARE SHALL BE EXERCISED TO PROTECT THE VMS MEMBRANE MID PREVENT PENETRATIONS SUBSEQUENT TO
• AFTER THE INSTALLATION OF THE PROTECTIVE GEOTEXTILE LAYER, REINFORCING STEEL, ANDALL FOUNDATION FORM
t. WHERE UTILITIES, VENT LINES, PIPING, ELECTRICAL CONDUITS, ETC. PENETRATE THE vm5 MEMBRANE, A 31NCH COLLAR OF
WORK, BUT PRIOR TO AND THROUGHOUTTHE PLACEMENT OF CONCRETE FOR THE FLOOR SLAB:
1. TIE VMS CONSTRUCTION SHALL CONSIST OF, BUT NOT BE LIMITED TO, TIE FOLLOWING:
REINFORCEMENT FABRIC AND ASPHALTIC MEMBRANE SHALL BE PROVIDED TO CREATE A GAS -TIGHT SEAL AROUND THE
ITS APPLICATION. THE VMS MEMBRANE SHALL BE PROTECTED FROM PEDESTRIAN TRAFFIC WITH THE PROTECTIVE
DURING AND AT THE COMPLETION OF THE VERTICAL VERISER PIPING D BLOWER INSTALLATION AND TESTING.
AL MI
PENETRATION IN ACCORDANCE WTTH THE MANUFACTURERS SPECIFICATIONS AS SHOWN ON DETAIL 3, SHEET VMS3.
GEOTEXTILE LAYER. THE PROTECTIVE GEOTEXTILE SHALL BE KEPT FREE OF DIRT AND DEBRIS, TO THE EXTENT POSSIBLE,
•
I . SUPPLY AND INSTALL 4-INCH AGGREGATE LAYER BENEATH FOUNDATION SLAB
UNTIL THE FLOOR SLAB IS POURED. R SHALL BE THE RESPONSIBILITY OF THE GENERAL CONTRACTOR TO ENSURE THAT THE
2. FINAL SUBGRADE INSPECTION /PREPARATION SHALL NOT PRECEDE THE VMS INSTALLATION BY MORE THAT 72 HOURS.
b. SUPPLY AND INSTALL 4-INCH PVC SLOTTED VAPOR VENT PIPING AND ASSOCIATED FITTINGS IN GRAVEL TRENCHES LINED
2. WHERE PENETRATIONS SUCH AS ELECTRICAL UTILITY CONDUITS, PLUMBING PIPING, ETC. ARE CONCENTRATED, A CONCRETE
VMS MEMBRANE AND THE PROTECTION SYSTEM ARE NOT PENETRATED AFTER TIE COMPLETION OF TIE INSTALLATION.
WIM GEOTEXTILE. TRENCHES SHOULD BE 12INCHES BELOW FOUNDATION SLAB
PENETRATION BANK WILL BE CONSTRUCTED TO SECURE THE PENETRATIONS IN -PLACE (SEE DETAIL 4, SHEET VMS3)_ THE
3. NOTIFICATION OF NCDEO IS REQUIRED AT LEAST 48 BUSINESS HOURS PRIOR TO INSPECTIONS. NOTE THAT UNDER NO
c. SUPPLY AND INSTALL , -INCH PVC MANIFOLD PIPING
PENETRATION BANK SHALL BE CONSTRUCTED USING A MINIMUM THICKNESS OF 12 INCHES EXTENDING A MINIMUM OF 8INCHES
10.RISERS STUBBED ABOVE THE FLOOR SLAB SHALL BE MARKED, CAPPED, AND PROTECTED UNTIL FINAL COMPLETION WITH
CIRCUMSTANCES SHALL WORK STOP BASED ON RESPONSE OR NON -RESPONSE FROM NCDEQ, BUT THE NOTIFICATION MUST
d. SUPPLY AND INSTALL 60-MIL ASPHALTIC LAVER
FROM ANY PENETRATION, ALLOWING FOR A MINIMUM 64NCH ATTACHMENT OF THE VMS MEMBRANE. SIMILAR TO AN
SLOWER,
TAKE PLACE FOLLOWING THE VMS SUBCONTIRACTOR NOTIFICATION OF THE BEGINNING OF WORK, THE VMS DESIGNER WILL
e. SUPPLY AND INSTALL PROTECTIVE AND BASE GEOTEXTILE LAYERS ABOVE AND BELOW THE ASPHALTIC LAYER
ATTACHMENT TO AN INTERIOR FOOTING. THE TOP OF CONCRETE PENETRATION BANK SHALL BE BELOW THE BOTTOM OF THE
G. INSTALLATION
NOTIFY NCDEO OF TIE INSPECTIONS.
RESPECTIVELY
1. PERFORM SMOKE AND COUPON TESTING OF THE VMS MEMBRANE
SLAB. PENETRATIONS SHALL NOT BE IN CONTACT WITH ADJACENT PENETRATIONS OR OTHER OBJECTS TO ALLOW PROPER
SEALING AROUND THE ENTIRE PENETRATION CIRCUMFERENCE.
G 1 VAPOR COLLECTION PIPING INSTALLATION
4. FIELD QUALITY CONTROL IS A VERY IMPORTANT PART OF ALL APPLICATIONS. THE VMS SUBCONTRACTOR SHALL rucOK H�;S
g. INSTALL WATERPROOFING AS PER PROJECT ARCHITECTURAL PLATS
t. VENT PIPING SHALL BE CONNECTED TO PROVIDE ACAS -TIGHT SEA AT ALL CONNECTIONS AND FITTINGS AND SHALL BE
OWN WORK FOR COVERAGE, THICKNESS, AND ALL-AROUND GOOD WORKMANSHIP.
N. SUPPLY AND INSTALL SCH. 40 PVC VERTICAL VENT RISER PIPING. SAMPLE PORTS AND GAS FITTINGS
8.5 WATERPROOFING
CONSTRUCTED OF MATERIALS THAT COMPLY WITH THE UNIFORM PLUMBING AND MECHANICAL CODES. ALL JOINTS SHALL BE
S. COUPON SAMPLES SHALL BE CUT FROM THE VMS MEMBRANE IN 2 SQUARE INCHES TO REPRESENT A MAXIMUM AREA OF PER
I. COMPLETE CONNECTION OF VERTICAL VENT RISER PIPING TO ROOF AS APPROPRIATE
Y FAILED WITH APPROVED .ANY GLUE R THE PIPING M BE AND MAY
TIGHTLY S OVE MATERIALS GU O SOLVENT USED TO SEAL G UST OW VOC
COMPOSITE SHALL
500 SQUARE FEET OF APPLICATION AND PROVIDED TO THE VMS THE THICKNESS OF THE COMPoSIT
I '. INSTAL RCOF4AOUNTED VACUUM BLOWERS
1. WATERPROOFING SPECIFIED IN THE PROJECT PLAITS SHALL BE PROVIDED BY THE VMS INSTALLE UNLESS OTHERWISE
R
NOT CONTAIN BENZENE 13BUTADIENE ETIYLBEN2ENE TRICHLOROETHENE CE I 4TRIMETHYLBENZENE AND M&P
IT I. '2'
BE MEASURED WITH A DIGITAL IPER HAVING A RESOLUTION OF 1 MIL OR BETTER_ THE THICKNESS OF THE BASE
CAL E
S PROVIDE ELECTRICAL SERVICE BLOWERSTEM AND
DESIGNATED. A WATERPROOFING SYSTEM SHALL BE INSTALLED TO PREVENT THE PASSAGE OF WATER UNDER HYDROSTATIC
XYLENES. COPIES OF MATERIAL SAFETY DATA SHEETS FOR MATERIALS THAT MAY IMPACT BACKGROUND INDOORAIR SHALL
GEOTEXTILE SHALL BE DEDUCTED FROM THE COMPOSITE THICKNESS IN ORDER TO DETERMINE THE THICKNESS OF THE
AN MSROL T
O F EFIESS
SUPPLY AND INSTALL BLOWER CONTROL SYSTEM AND TEST FORELIC
CONDITIONS AND TO MINIMIZE VAPOR INTRUSION OF SUBSURFACE GASES INTO THE BUILDING SEALING THE VMS ASPHALTIC
m. SUPPLY AND INSTALL BLOWER CONTROL PANEL WITH MAGNEHLLIC GAUGES AND A VISUAL AND AUDIBLE ALARM SYSTEM
GAUGES D A VISUAL
MEMBRANE. ALL WATERPROOFING MATERIALS SHALL BE REVIEWED BY THE MS DESIGNER AND VMS MEMBRANE
BE RETAINED BY THE GENERAL CONTRACTOR FOR SUBMITTAL IN THE FINAL REPORT.
ASPHALTIC LAYER. WHEN WARRANTED THE TEST AREA SHALL BE MARKED BY THE VMS DESIGNER FOR REPAIR.
'
AND TEST FOR OPERATION
MANUFACTURER FOR COMPATIBILITY WITH THE ASPHALTIC MEMBRANE AND THE VAPOR CONTAMINATES PRESENT IN THE
2 PLACEMENT OF AGGREGATE ABOVE THE PIPING SHALL NOT BEGIN BEFORE THE VMS DESIGNER HAS INSPECTED THE GRADE
DOCUMENTATION SHALL BE INCLUDED IN THE FINAL REPORT SUBMITTED TO NCDEQ.
SUBSURFACE. MANUFACTURER'S PRODUCT INFORMATION AND INSTALLATION PROCEDURES SHALL BE SUBMITTED TO AND
AND ALIGNMENT OF THE PIPING, THE DEUDING OF THE PIPING AND THE JOINTS BETWEEN THE PIPING. ALL PIPING LOCATED
6. VOIDS LEFT BY SAMPLING SHALL BE PATCHED BY THE VMS SUBCONTRACTOR BY OVERLAPPING THE VOID BY A MINIMUM OF 6
2. ALL MATERIALS ARE TO BE DELIVERED TO THE PROJECT SITE IN THEIR ORIGINAL UNBROKEN PACKAGES BEARING THE
APPROVEDAMINIMUM OF FOUR WEEKS PRIORTO INSTALLATION.
WITHIN THE AGGREGATE LATER SHALL BE PROTECTED FROM PHYSICAL DAMAGE. DOCUMENTATION SHALL BE INCLUDED IN
INCHES. A THIN TACK GOAT OF ASPHALTIC EMULSION SHALL BE APPLIED TO ADHERE TO TIE GEOMXTILE BASE PATCH.
MANUFACTURER'S LABEL SHOWING BRAID, WEIGHT,VOLUME, BATCH NUMBER AND DATE. MATERIALS ARE TO BE STORED AT
THE FINAL REPORT SUBMITTED TO NCDEQ.
SPRAY OR TROWEL APPLIED ASPHALTIC EMULSION SHALL THEN BE APPLIED TO A 100 MIL MINIMUM DRY THICKNESS,
THE PROJECT SITE IN STRICT COMPLIANCE WITH THE MANUFACTURERS INSTRUCTIONS.
2. THE VMSNJATERPROOFING INSTALLER SHALL BE A MANUFACTURER -AUTHORIZED INSTALLER WHO IS TRAINED AND PERFORMS
EXTENDING AT LEAST 31NCHES BEYOND THE GEOTEXTILE PATCH.
WORK IN ACCORDANCE WITH MANUFACTURER STANDARDS AND POLICIES. FOR PROJECTS REQUIRING A NO -DOLLAR LIMIT
3. SUB -SLAB TRANSITION PIPING GREATER THAN 10 FEET IN LENGTH SHOULD HAVE t/,INCH DIAMETER WEEP HOLES DRILLED ON
II. VAPOR MITIGATION SYSTEMO
LABOR AND MATERIAL WARRANTY, THE WATERPROOFING INSTALLER MUST M MANUFACTURER CERTIFIED AT THE TIME OF
THE BOTTOM OF THE PIPE APPROXIMATELY EVERY 5 FEET.
T. ON CONCRETE SURFACES, THE VMS MEMBRANE SHALL BE CHECKED FOR COVERAGE WITH A UGHTLY OILED, NEEDLE NOSE
BIDDING. PLEASE CONTACT THE SELECTED MANUFACTURER FOR WARRANTY TERMS AND CONDITIONS AND ADDITIONAL
DEPTH GAUGE. THE MINIMUM READING SHALL BE RECORDED AND THE TEST AREA SHALL BE MARKED FOR REPAIR BY THE VMS
A. GAS VENT SYSTEM
INFORMATION.
4. SOLID RISER PIPE SHALL BE LOCATED WITHIN THE WALLSICHASES OR SHALL BE SIMILARLY PROTECTED FROM PHYSICAL
DAMAGE. DAMAGE INCURRED DURNG CONSTRUCTION OR OCCUPMNCY COUMD FELT SYSMM PERFORMANCE.
DESIGNER.
AGGREGATELAYER
THE OWNER AND THE VMS DESIGNER SHALL NOT BE Al AL Al C. QUITY ASSURANCE .CONCRETE TEST AREAS SHALLSS BE PATCHED WITH ASPHALTIC MEMBRANE TO MIL MINIMUM DRY THICKNE,EXTENDING
RESPONSIBLE IN ANY WAY FOR CONTRACTORS AND A MINIMUM ,-INCH LAYER O SANB-BR RAVEL AGGREGATE SHALL BE PROVIDED BENEATH THE FOUNDATION SLAB. THE G 2 SUB -SLAB MONITORING POINTS S AMINIMUM OF 1 INCH BEYOND THE TEST PERIMETER.
SUBCONTRACTORS COMPLUWCE WITH THE 1. THE VMS SUBCONTRACTOR SHALL BE TRAINED AND APPROVED BY THE VMS MATERIAL MANUFACTURER. THE VMS
AGGREGATE LAYER SHALL BE A FINE TO MEDIUM AGGREGATE AND CONTAIN NO MORE THAN 5%FINES (I.E. s5 % PASSING #200 1. PRIOR TO DURING THE INSTALLATION OF THE VMS PIPING, SUBSLAB VACUUM MONITORINGNAPORSALMPLING POINTS WILL BE
"OCCUPATIONAL SAFETY AND HEALTH SUBCONTRACTOR SHALL PROVIDE THE VMS DESIGNER WITH ALETTER FROM THE MANUFACTURER A CONFIRMING THAT THE 9. EACH COMPLETED AREA OF VMS MEMBRANE SHALL BE SMOKE TESTED AT THE COMPLETION OF THE INSTALLATION IN
SIEVE), THE GRADATION OF THE AGGREGATE PLACED BELOW THE MEMBRANE SHALL MEET THE FOLLOWING SPECIFICATIONS () INSTALLED. VAPOR PIN INSERTS WILL BE USED TO FACILITATE THE INSTALLATION OF A VAPOR PIN WITHIN THE BUILDING
REGULATION$' OF THE U.S. DEPARTMENT OF LABOR VMS SUBCONTRACTOR RETAINED BY THE OWNER FOR THE PERFORMANCE OF THIS SCOPE OF WORK IS CERTIFIED BY THE ACCORDANCE WITH MANUFACTURERS PROTOCOL TO CONFIRM THE INTEGRITY OF THE VMS MEMBRANE. ONE SMOKE TEST
AND ALL LOCAL AND STATE REGULATION$. OR AS SPECIFIED IN THE GEOTECHNICAL REPORT IF APPROVED BY THE VMS DESIGNER: FOOTPRINT SHOWN ON SHEET VMS-2 THE VAPOR PIN AND INSERT IS SHOWN AS DETAIL 21, SHEET VMS-3.
MANUFACTURER FOR INSTALLATION OF THE MATERIAL; AND (B) WARRANTING ITS MATERIAL TO BE FREE OF DEFECTS WHEN SHALL BE CONDUCTED FOR A MAXIMUM OF EVERY 2,500 SQUARE FOOT AREA ANY LEAKS WHICH ARE IDENTIFIED SHALL BE
CONTRACTOR AGREES THAT HE SHALL ASSUME ZI WEE Peranl PaaeEN THAT MATERIAL IS INSTALLED BY THE VMS SUBCONTRACTOR THIS LETTER SHALL SE RETAINER BY THE GENERAL 2. PRIOR TO INSTALLATION OF THE VMS MEMBRANE, CONFIRM THE FINAL SLAB HEIGHT AND LOCATION OF THE VAPOR PIN WITH REPAIRED AND RETESTED UNTIL ALL LEAKS MRFORATONS ARE ELIMINATED. DOCUMENTATION SHALL BE INCLUDED IN THE
SOLE AND COMPLETE RESPONSIBILITY FOR JOB 1 W 14-GRAVEL 3,8' GRAVEL CONTRACTOR FOR INCLUSION IN THE FINAL REPORTTO NCDEQ. THE GC. INSTALL A THREADED ROD THAT EXTENDS FROM THE AGGREGATE BASE TO ABOVE THE PROPOSED SLAB SURFACE. FINAL REPORT SUBMITTED TO MCUEQ S9.
SITE CONDITIONS DURING THE COURSE OF NNTD.9 t 1-OD9HA, PLACE THE VAPOR PIN INSERT ON THE THREADED ROD AND ADD VENT HOLES TO THE BOTTOM OF THE INSERT THAT ARE
CONSTRVCTION OF THIS PROJECT, INCLUDING 18 3�,' 9&t00 t00 2_ A -INSTALLATION CONFERENCE SHALL BE HELD PRIOR TO THE APPLICATION OF THE VMS MEMBRANE TO COORDINATE BELOW THE MEMBRANE. INSTALL THE CAP ON THE VAPOR PIN INSERT MAKING SURE IT IS LEVEL WITH THE FINAL FLOOR IO.PRIOR TO PLACING THE CONCRETE SLAB OVER THE VMS MEMBRANE, THE VMS SUBCONTRACTOR SHALL CERTIFY IN WRITING
SAFETY OF ALL PERSONS AND PROPERTY, THAT Nn. 30 55-)5 3/8- 2Db5 )0.95 PROPER SUBSTRATE AND INSTALLATION CONDITIONS AND PROCEDURES. THE VMS SUBCONTRACTOR SITE SUPERINTENDENT, THAT THE VMS MEMBRANE HAS BEEN INSTALLED AND TESTED IN ACCORDANCE WTM THE MANUFACTURERS SPECIFICATIONS
THIS REQUIREMENT SHALL APPLY CONTINUOUSLY 10. alD 0.25
ANDIOR SLAB SURFACE.
O N°' 4 THE FOUNDATION SUBCONTRACTOR 3UBSLAB UTILITY CONTRACTORS, AND THE VMS DESIGNER SHALL BE PRESENT AT THIS AND IS FREE OF LEAKS, AND RASA MINIMUM THICKNESS OF 60 MILS.
AND NOT BE LIMITED TO NORMAL WORKING HOURS, t0D 2-1D NP.0 os 0.1D
ASTM C 131 Ten Gletlin MEETING.
9
3. SEA THE VAPOR PIN INSERT AS A VMS MEMBRANE PENETRATION DETAIL 3 SHEET VM33 AND SMOKE TEST THE VAPOR PIN AND THAT THE CONTRACTOR SHALL DEFEND, ( ) 11 SERVICE LISTED IN THIS SPECIFICATION AS BEING REQUIRED BY THE VMS DESIGNER ARE DEPENDENT UPON OWN=F
INDEMNIFY, AND HOLD THE OWNER AND THE VMS
DESIGNER HARMLESS FROM ANY AND ALL LIABILITY
REAL OR ALLEGED, IN CONNECTION WITH THE
PERFORMANCE OF WORK ON THIS PROJECT,
EXCEPT FOR LIABILITY ARISING FROM THE SOLE
NEGLIGENCE OF THE OWNER OR THE VMS
DESIGNER.
IN CASE OF CONFLICT BETWEEN THESE PLANS AND
OTHER SITE DESIGN DOCUMENTS AND/OR
MANUFACTURER SPECIFICATIONS I REQUIREMENTS
THE APPROPRIATE PARTIES / COMPANIES WITH
CONFLICTING DOCUMENTATION SHALL CONFER TO
DETERMINE A MUTUALLY AGREED UPON SOLUTION_
2. THE AGGREGATE WILL BE PLACED IMMEDIATELY BELOW THE VAPOR BARRIER AND LINE THE TRENCHES FOR THE SUB -SLAB 3. THE INSTALLATION OF THE VMS MEMBRANE SHALL BE CLOSELY MONITORED BY THE VMS DESIGNER OR HIS DESIGNATED INSERT. FOLLOWING THE SLAB POUR, THE VMS DESIGNER WILL CLOSELY OBSERVE THE REMOVAL OF THE THREADED ROD AND AUTHORIZATION OF SAID SERVICES TO VMS DESIGNER AND NOTIFICATIONS TO THE VMS DESIGNER OF THE PROJECT STAT..F
VAPOR COLLECTION PIPING. REPRESENTATIVE. INSPECTIONS SHALL BE PERFORMED PRIOR TO, WRING, AND SUBSEQUENT TO TIE INSTALLATION OF THE VAPOR PIN INSTALLATION. APPLY THE CAP WHEN POINT IS MOT IN USE. APPLY A METAL COVER TO THE FINAL FLOOR SURFACE BY THE VMS SUBCONTRACTOR. IF THESE SERVICES ARE NOT PERFORMED BY THE VMS DESIGNER, THE MANUFACTURERF.
VAPOR VENT PIPING AND APPLICATION OF THE VMS MEMBRANE. IT IS THE RESPONSIBILITY THE VMS SUBCONTRACTOR TO FOR ACCESS DURING PRESSURE MONITORING EVENTS. WARRANTY MAY BE VOIDED.
3. ANY AGGREGATE REMOVED DURING PLACEMENT OF UTILITIES MUST BE PLACED BACK TO LEVEL GRADE AND COMPACTED AS NOTIFY THE OWNER AND VMS DESIGNER WITHIN 72 HOURS OF BEGINNING ANY PORTION OF THIS WORK.
SPECIFIED IN THE PROJECT PLANS AND SPECIFICATIONS. UTILITIES PLACED IN THE AGGREGATE LAYER MAY NOT BE LARGER G.3 VMS MEMBRANE AND PROTECTIVE LAYER INSTALLATIONS
THAN 1-INCH IN DIAMETER. UTILITIES LARGER THAN 1-INCH IN DIAMETER MUST BE BURIED INTO THE SUBGRADE SUCH THAT NO 4. ALL SURFACES TO RECEIVE THE VMS MEMBRANE SHALL BE INSPECTED AND APPROVED BY THE VMS SUBCONTRACTOR FOR
MORE THAN 1 INCH OF THE AGGREGATE LAYER IS AFFECTED. THE PERFORMANCE OF THIS SCOPE OF WORK AND BY THE VMS DESIGNER PRIOR TO COMMENCING WORK. FIELD REPORTS
t. THE SUBGRADE SHALL BE MOISTURE CONDITIONED AND COMPACTED BY THE GRADING CONTRACTOR PS SPECIFIED IN THE
AND PHOTOGRAPHS OF THE INSPECTIONS SHALL BE INCLUDED IN THE FINAL DELIVERABLE TO NCDEQ.
PROJECT PLANS AND SPECIFICATIONS. THE FINISHED SURFACE SHALL BE SMOOTH UNIFORM AND FREE OF DEBRIS AND
4. THE SUBGRADE UNDER THE AGGREGATE SHALL BE ROLLED SMOOTH AND MOISTURE CONDITIONED AS NECESSARY TO STANDING WATER. FINAL SUBGRADE INSPECTONIPREPARATION SHALL NOT PRECEDE THE VMS INSTALLATION BY MORE THAN
ACHIEVE THE COMPACTION SPECIFIED IN THE GEOTECHNICAL ENGINEERS SPECIFICATION. 5. PRIOR TO PLACING THE FLUOR SLAB OVER THE MEMBRANE, THE VMS DESIGNER SHALL INSPECT AND APPROVE THE 72 HOURS.
MEMBRANE IN ACCORDANCE WITH THESE PLANS AND SPECIFICATIONS. CONSTRUCTION OF THE FLOOR SLAB SHALL NOT
A 2 SUB -SLAB VAPOR COLLECTION PIPING PROCEED WITHOUT WRITTEN CERTIFICATION OF THE SUCCESSFUL INSTALLATION BY THE VMS SUBCONTRACTOR. 2. THE AGGREGATE LAYER SHALL BE MOISTURE CONDITIONED AND COMPACTED AS SPECIFIED IN THE PROJECT PLANS AND
1. SUI SLM VAPOR COLLECTION PIPING SHALL BE COMPRISED OF SCH40,-INCH DIAMETER POLY VINYL CHLORIDE )PVC) 0.020 DOCUMENTATION OF PROPER INSTALLATION SHALL BE INCLUDED IN THE FINAL REPORT TO NCDEQ. SPECIFICATIONS.
SLOTTED OR EQUIVALENT (SEE DETAIL I, SHEET VMSJ) D. SUBMITTALS
3. IF THE VMS MEMBRANE IS TO BE PLACED ON A CONCRETE SURFACE, CONCRETE SURFACES SHALL BE LIGHT BROOM FINISHED
2. VAPOR COLLECTION PIPING SHALL BE INSTALLED AT LOCATIONS SHOWN ON VMS2 AND PLACED IN TRENCHES BELOW THE F THE VMS SUBCONTRACTOR SHALL SUBMIT ANV UPDATES OR REVISIONS TO THE MANUFACTURERS MATERIAL DATA AND OR SMOOTHED, FREE OF ANY DIRT, DEBRIS, LOOSE MATERIAL, RELEASE AGENTS OR CURING COMPOUNDS. ALL VOIDS MORE
4-INCH AGGREGATE LAYERISM DETAIL I, SHEET VMSS). GRAVEL PLACED ARWND THE VAPOR VENT PIPING SHALL CONFORM RECOMMENDED INSTALLATION PROCEDURES TO THE VMS DESIGNER FOR REVIEW AND APPROVAL AT LEAST ONE WEEK PRIOR THAN UINCH IN WIDTH SHALL BE PROPERLY FILLED WTM NON -SHRINK GROUT OR AS SPECIFIED IN THE PROJECT PLANS AND
TO THE SPECIFICATIONS IN SECTION A t 1 OF THIS SHEET. THE CONSTRUCTION OF THE VMS MEMBRANE. SPECIFICATIONS MASONRY JOINTS SHALL BE STRUCK SMOOTH WITH A METAL TROWEL ALL PENETRATIONS SHALL BE
TO
PREPARED IN ACCORDANCE WITH THE MANUFACTURERS SPECIFICATIONS.
3. THE GRAVEL TRENCHES SHALL BE LINED WITH A NON -WOVEN GEO-TEXTILE FROM THE BOTTOM OF THE TRENCH TO THE VMS 2 THE VMS SUBCONTRACTOR SHALL SUBMIT REPRESENTATIVE SAMPLES OF THE FOLLOWING TO THE VMS DESIGNER FOR
MEMBRANE. VAPOR COLLECTION PIPING SHALL BE PLACED SUCH THAT NO AREA BENEATH THE SLAB&OMDATION IS MORE APPROVAL
-APPROXIMATELY 25 FEET FROM THE VAPORCOLLECTON PIPING BASE BOND AND UPPER PROTECTIVE MATERIALS
4. VAPOR COLLECTION PIPING SHALL BE CONNECTED TO SCH40 4-INCH DIAMETER SOLID TRANSITION PIPING AND MANIFOLDED • VMS MEMBRANE MATERIAL
TO A &INCH RISER PIPE USING A, -INCH TO &INCH ECCENTRIC REDUCER (SEE DETAIL 26. SHEET VMS-3). THE 6-INCH PVC • BASE GEOTEXTLES
RISER PIPING WILL TRANSITION TO STEEL OR CAST IRON BENEATH THE SLAB TURNING UP THROUGH THE FLOOR SEAS AND TO • AGGREGATE MATERIAL
THE ROOF WITHIN A PLUMBING CHASE. • SLOTTED VAPOR COLLECTION PIPING
4. ALL VMS MEMBRANE PENETRATIONS SHALL BE PREPARED IN ACCORDANCE WITH MANUFACTURER'S SPECIFICATIONS. WHERE
POSSIBLE, ANY FORM STAKES THAT PENETRATE THE VMS MEMBRANE SHALL BE RE -BAR WHICH SHALL BE BENT OVER AND
LEFT IN THE SLAB.
5. TRENCHES
6. TIE WALLS OF FOOTING OR UTILITY TRENCHES SHALL BE SMOOTH AND FREE OF ROOTS OR PROTRUDING ROCKS.
3. AT THE COMPLETION OF INSTALLATION, THE VMS SUBCONTRACTOR SHALL SUBMIT A LETTER TO THE VMS DESIGNER AND TO
S. ALL TRANSITION PIPING SHALL BE IN PLACE PRIOR TO POURING THE FOUNDATION GRAOE BEAMS OR FOOTINGS WHEN POURED THE OWNER CERTIFYING THAT VMS INSTALLATION WAS COMPLETED IN ACCORDANCE WITH THE PROJECT PLANS AND ). IF ORGANIC MATERIALS WITH POTENTIAL FOR GROWTH E.G. SEEDS OR GRASSES) ME PRESENT WITHIN THE SUBGRADE, THE
SEPARATELY FROM ME FLOOR SLAB. THE PIPING TRANSITIONS SHALL BE ACCOMPLISHED IN COMPLIANCE WITH THE ALL SPECIFICATIONS AS WELLAS MANUFACTURER SPECIFICATIONS. GENERAL CONTRACTOR SHALL APPLY A SOB STERILANT AT THE MANUFACTURER'S RECOMMENDED RATE PRIOR TO THE
APPLICABLE BUILDING CODES AND WITH THE APPROVAL OF THE PROJECT STRUCTURAL ENGINEER ANDIOR BUILDING OFFICULL. INSTALLATION OF THE VMS MEMBRANE.
TRANSINON PIPING SHALL BE GLUED TOGETHER AND INSTALLED AT A SLOPE TO PREVENT MOISTURE CONDENSATE BUILD P 4. UPON COMPLETION OF CONSTRUCTION, A REPORT WILL BE SUBMITTED TO NCDEQ UNDER LICENSED P.E. SEA. THE REPORT
AND ALLOW DRAINAGE TO AGGREGATE. WILL SUMMARIZE THE INSTALLATION, OA/OC MEASURES, SYSTEM EFFECTIVENESS TESTING, AND DOCUMENTATION THAT THE g THE BASE LAYER SHALL FIRST BE LAID ON THE AGGREGATE LAYER IN ACCORDANCE WITH THE MATERIAL MANUFACTURER'S
VMS WAS INSTALLED IN ACCORDANCE WITH THE DESIGN OBJECTIVES. THE REPORT WILL ALSO INCLUDE THE FOLLOWING: SPECIFICATIONS. ALL SEAMS SHALL BE OVERLAPPED A MINIMUM OF 6 INCHES. ANT OPEN UTILITY OR OTHER TRENCH
6. MY PVC GLUES USED TO CONNECT SUSSLAS PIPING SHALL BE LOW-VOC, AND SHALL NOT CONTAIN BENZENE, 1,3 UTADIENE, AS UILT DRAWINGS, INSPECTION LOGS, PHOTOGRAPHS, FIELD LOGS, COMPLETION LETTER FROM VMS SUBCONTRACTOR, PRESENT AT THE TIME OF APPLICATION SHALL BE LINED WITH PROTECTIVE BASE LAYER EXTENDING AT LEAST 61NCHES ONTO
ETHYLBENZENE, TRICHLOROETHENE RCEI, E2p-TRIMEMYLBENZENE, AND MBP XYLENES. AND MATERIAL SAFETY DATA SHEETS FOR MATERIALS USED DURING CONSTRUCTION THAT COULD IMPACT BACKGROUND
THE ADJOINING SUBGRADE. THE BASE LAYER SHALL BE IN INTEGRAL CONTACT WITH ALL INTERIOR FOUNDATION CORNERS
A.3 ABOVE SLAB GAS VENT RISER INDOOR AIR CONCENTRATION. ASPHALTIC MEMBRANE SHALL BE SPRAY APPLIED AT ALL OVERLAPPED SEAMS TO A THICKNESS OF 60 MILS MINIMUM.
1. VEAL RISER TO THE ROOF SHALL BE COMPRISED O &INCH UIMETER SCH40 PVC RISER PIPING SHALL BE LOCATED WITHIN 5. IT IS THE RESPONSIBILITY OF THE GENERAL CONTRACTOR TO COLLECT AND MAINTAIN A DATABASE OF MATERIAL SAFETY 9. INSTALL THE PROTECTIVE BOND LAYER OVER THE NOMINALLY CURED ASPHALTIC LAYER NO LATER THAN RECOMMENDED BY
THE WALLSXHASES OR INSTALLED ADJACENT TO INTERIOR SUPPORT COLUMNS. DATA SHEETS FROM ALL RELEVANT SUBCONTRACTORS AND THE COMPLETION LETTER FROM THE MS SUBCONTRACTOR. MANUFACTURER AND BEFORE STARTING SUBSEQUENT CONSTRUCTION OPERATIONS. VISUAL INSPECTION AND SMOKE
TESTING MUST BE PERFORMED PRIOR TO PLACING THE PROTECTIVE LAYER OVER THE ASPHALTIC LAYER
2. THE RISER PIPE TO THE RIDGE SHALL BE FULLY SUPPORTED THROUGH THE ENTIRE HEIGHT OF THE BUILDING WI PIPE E. WARRANry
CLAMPS OR SIMILAR, SUCH THAT NO DOWNWARD FORCE (DUE TO THE WEIGHT OF THE RISER PIPE) IS EXERTED ON THE G < SEALING PENETRATIONS
SU85LA6 VENTING SYSTEM. 1. THE OWNER REQUIRES WARRANTYFOR THE VMS MEMBRANE AND WATERPROOFING.
1. ALL PENETRATIONS SHALL BE CLEANED AND PREPARED TO PROVIDE PROPER ADHESION OF THE ASPHALTIC LAYER FOR A
3. A RISER PIPING SAMPLE PORT SHALL BE INSTALLED TO ACCESS THE VENT SYSTEM FOR MONITORING. THE SAMPLE PORT 2, MANUFACTURER MAY REQUIRE SUBMITTAL OF DESIGN DOCUMENTS, ENVIRONMENTAL REPORTS, GEOTECHNICAL REPORTS, VAPOR TIGHT SEAL METAL PENETRATIONS SHALL BE SANDED CLEAN AND PREPARED USING EMERY CLOTH FOR PROPER
SHALL CONSIST OF AN SX&INCH MEDIUM SECURFDAOCESS DOOR AND A STAINLESS STEEL HEX REDUCING BUSHING MNPT X OR OTHER DOCUMENTATION FOR REVIEW PRIOR TO ISSUING A WARRANTY, AND ADDITIONAL COSTS MAY APPLY. PLEASE ADHESION OF THE ASPHALTIC LAYER
FNPT 12Xt/4-INCH WITH REMOVEABLE MALE GUIGK CONNECT FIRING (SEE DETAILS 17,10, AND 25 SHEET VM53)
CONTACT THE SELECTED MANUFACTURER FOR WARRANTY TERMS AND CONDITIONS AND ADDITIONAL INFORMATION.
2. ALL PENETRATIONS SHOULD BE SECURED PRIOR TO INSTALLATION OF THE VMS MEMBRANE SYSTEM. PENETRATIOUS SHALL
4. PLACARDS SHALL BE INSTALLED ON EACH VENT RISER APPROXIMATELY EVERY 5 FEET AND AT ANY EXPOSED RISER PIPING 3. MANUFACTURERS EXTENDED WARRANTIES MUST BE REQUESTED BY THE OWNER PRIOR TO VMS INSTALLATION BID NOT BE IN CONTACT WITH ADJACENT PENETRATIONS OR OTHER OBJECTS TO ALLOW PROPER SEALING AROUND THE ENTIRE
(SEE DETAIL 24. SHEET VMSS). REQUESTS. PENETRATION CIRCUMFERENCE. WHERE PENETRATIONS SUCH AS ELECTRICAL CONDUITS, PLUMBING PIPING, EEC ARE
F. JDS CONDITIONS CONCENTRATED, A CONCRETE PENETRATION BANK WILL BE CONSTRUCTED PRIOR TO VMS MEMBRANE PLACEMENT THE
5. A VMS MEMBRANE IDENTIFICATION SIGN SHALL BE INSTALLED IN UTILITY AND MECHANICAL ROOMS (SEE DETAIL 23, SHEET CONCRETE PENETRATION BANK WILL CONSIST OF A MINIMUM THICKNESS OF 12 INCHES OF CONCRETE, EXTENDING A MINIMUM
VMS-3) . THIS SIGN IS TO BE PLACED ON THE WALLS AT EYE LEVEL AND SHALL NOT BE COVERED OVER THE LOCATION OF THIS I THE AREAS ADJACENT TO TIE VMS MEMBRANE ARE TO BE PROTECTED BY THE VMS SUBCONTRACTOR FOR THE OF a INCHES BEYOND THE EDGE OF EACH PENETRATION TO ALLOW FOR ATTACHMENT OF THE VMS MEMBRANE (SEE DETAIL 4,
NOTIFICATION WILL BE DETERMINED BY TIE CONTRACTOR GAINER OR BUILDING OFFICIAL. PERFORMANCE OF THIS SCOPE OF WORK WRING THE INSTALLATION PROCESS. WHERE NECESSARY, MASKING OR OTHER SHEET VMSS).
B. VMS MEMBRANE PROTECTIVE MEASURES SHALL BE UTILIZED TO PREVENT STAINING OF SURFACES BEYOND THE LIMITS OF THE APPLICATION.
3. THE BASE LAVER SHALL BE CUT AROUND PENETRATIONS SO THAT IT LAYS FLAT ON THE SUBGRADE. THERE SHOULD NOT BE A
Bt MATERIALS 2. WORK IS TO BE PERFORMED ONLY WHEN EXISTING AND FORECASTED WEATHER CONDITIONS ARE WITHIN THE GAP LARGER THAN IA -INCH BETWEEN THE BASE LAYER AND THE PENETRATION KIM DETAIL 3, SHEET WS-3).
MANUFACTURER RECOMMENDATIONS FOR THE MATERIAL AND PRODUCT USED. THE APPLICATION OF ME VMS MEMBRANE
1. THE VMS MEMBRANE SHALL CONSIST OF A SPRAYED -ON OR LOCALLY TROWEL APPLIED. ASPHALTIC EMULSION LAYER COMPOUNDS SHALL BE SUSPENDED IF THE AMBIENT TEMPERATURE FALLS BELOW 4S F, OR DURING PERIODS OF 4' APPLY ONE COAT OF ASPHALTIC MEMBRANE TROWEL GRADE OR ASPHALTIC MEMBRANE SPRAY TO THE BASE GEOTEXTLE
BETWEEN TWO LAYERS OF PROTECTIVE GEOTEXTILE MATERIAL. PRECIPITATION. APPLICATION OF THE VMS MEMBRANE MAY BE PERFORMED BELOW 4 F, BUT ONLY WTM WRITTEN LAVER AND AROUND THE PENETRATIONS AT A THICKNESS OF 60 MILS. PENETRATIONS SHOULD BE TREATED IN A 6-INCH
RADIUS AROUND THE PENETRATION AND 31NCHES ONTO THE PENETRATION OBJECT
2. INSTALLATION OF THE BASE LAYER AND PROTECTIVE FABRIC SHALL BE INSTALLED IN ACCORDANCE WITH THE
PERMISSION FROM THE VMS DESIGNER AND MATERIAL MANUFACTURER. .
MANUFACTURER'S SPECIFICATIONS UNLESS OTHERWISE SPECIFIED AND APPROVED BY THE VMS DESIGNER 5. BASE GEOTEXTILE LAYER BOND MATERIAL OR REINFORCEMENT FABRIC SHALL BE USED AS AN EMBEDDED GEOTEXTILE LAYER
3. AMINIMUM CLEARANCE OF 241NCHES IS REQUIRED FOR ATYPICAL SPRAY APPLICATION OF ME ASPHALTIC LAYER. FOR AREAS COLLAR PLACED AFTER THE FIRST APPLICATION OF THE ASPHALTIC MEMBRANE SPRAY OR ASPHALTIC MEMBRANE TROWEL
B2 BASE AND PROTECTIVE LAYERS WITH LESS THAN 241NCH CLEARANCE, THE ASPHALTIC LAYER MAY BE APPLIED BY HAND.
GRADE. THEN SPRAY A SECOND 80 MIL COAT OVER THE EMBEDDED REINFORCING LAYER ENSURING THE COMPLETE
1. THE BASE LAYER SMALL CONSIST OF A CHEMICALLY RESISTANT POLYPROPYLENE GEOTEXTILE MATERIAL SUPPLIED BY THE 4_ ALL PLUMBING, ELECTRICAL, MECHANICAL AND STRUCTURAL ITEMS THAT ARE LOCATED BENEATH OR THAT PASS THROUGH SATURATION OFTHE EMBEDDED LAVERAND TIGHT SEAL AROUND THE PENETRATION.
MANUFACTURER AND APPROVED BY THE VMS DESIGNER THE BOTTOM BASE LAYER IS INSTALLED AS A CARRIER FABRIC FOR THE VMS MEMBRANE SHALL BE POSITIVELY SECURED IN THEIR PROPER POSITIONS AND APPROPRIATELY PROTECTED PRIOR
THE VMS MEMBRANE. TO APPLICATION OF THE ASPHALTIC LAYER. ADDITIONALLY, OBJECTS USED TO SUPPORT UTILITIES PRIOR TO POURING THE
SLAB SHALLBESOUD. HOLLOW STEEL TUBING IS -ACCEPTABLE.
1. POST -OCCUPANCY TESTING
PRESSURE FIELD EXTENSION WIL BE MEASURED AT THE VMS MONITORING POINTS USING A MIGROMANOMETER CAPABLE OF
MEASURING A VACUUM TO 0.001 INCHES OF WATER (IN WC.). TESTING WILL BE CONDUCTED ON A MONTHLY BASIS FOR ME
FIRST YEAR WITH COLLECTED INFORMATION SUBMITTED TO THE BROWNFIELDS PROJECT MANAGER ON A QUARTERLY BASIS.
BASED ON THE FIRST YEAR OF PRESSURE READINGS, AND WITH APPROVAL OF THE BROWNFIELDS PROGRAM, PRESSURE
TESTING MAY BE COLLECTED QUARTERLY AND DATA WOULD BE SUBMITTED WITH THE ANNUAL LAND USE RESTRICTION
UPDATE.
RECOMMENDED VAPOR MITIGATION SYSTEM TASKS SUMMARY
TASKS TO BE COMPLETED RECOMMENDED CONTRACTOR'TRADE
SPONSISUE MR SK
GC VMS SUB CONTRACTOR
SUBGRADE PREPARATION
PLACEMENT OF 44NCH MIN. COMPACTED AGGREGATE LAYER ABOVE
DE.
X
RMAAR
PREPARATION OF AGGREGATE TO ALLOW FOR MEMBRANE ATTACHMENT TO
VERTICAL AND HORIZONTAL SURFACES
X
CONSTRUCTION OF t2-INCH THICK CONCRETE PENETRATION BANKS WHERE
UTILITY CONDUITS ARE CONCENTRATED.
INSTALL WATRE PROOFING UNDER SLAB SYSTEM PER MANUFACTURERS
INSTRUCTIONS AND ARCHITECTURAL PLANS
INSTALLATION OF VEAL SYSTEM
EXCAVATION OF TRENCHES FOR VAPOR COLLECTION PIPING, TRANSITION
PIPING, AND GEOTEXTILE FABRIC TO LINE TRENCHES
INSTALLATION OF PIPE TRAMITIONSTHROUGH GRADE BEAMSOR THICKENED
SLABS.
X
INSTALLATION OF VAPOR COLLECTION PIPING AND TRANSENON PIPING
X
CONNECTION OF ME VAPOR COLLECTION TO PIPE COUPLINGS.
BACKFILLOFAGGREGATEOVERTHEHFADER PIPE AND VAPOR COLLECTION
PIPING AFTER INSTALLATION IS COMPLETED.
X
X
CONNECTOR OF THE EXHAUST PIPE TO A ROOF MOUNTED VACUUM BLOWER.
X
INSTALLATION OF VENT PIPE RISER SAMPLE PORTS AND ACCESS PANEL ON
INTERIOR WAIL
X
INSTALLATON OF 4-INCH VERTICAL VENT RISERS, ENDING A MINIMUM OF 2V
A80VE FINISHED ROOF.
X
INSTALLATION AND TESTING OF ROOF MOUNTED BLOWER, CONTROL SYSTEMS.
AND ALARMS
X
INSTALLATION OF GAS VAPOR MEMBRANE
REMOVAL OF EXCESS SOILS FROM BUILDING PAD AND SITE, IF NECESSARY,
X
PLACEMENT OF BASE GEOTEXTILE LAYER AND VMS MEMBRANE.
X
SEALING OF ALL FLOOR SLAB PENETRATIONS
X
PLACEMENT OF GEOTEXTILE LAYER OVER VMS MEMBRANE.
X
PERFORMANCE OF SMOKE TEST AND FINAL OC OF VMS MEMBRANE.
X
INSPECTION OF SYSTEM BY CERTIFIED VMS MEMBRANE TECHNICW4 DURING
INSTALLATION.
X
INSTALLATION OF SUB -SLAB MONITORING PONTS
X
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STANDARD OF CARE AND LIMITATIONS
TERRACON'S SERVICES WILL BE PERFORMED IN A MANNER CONSISTENT WITH GENERALLY ACCEPTED PRACTICES OF THE
PROFESSION UNDERTAKEN IN SIMILAR DESIGNS IN THE SAME GEOGRAPHICAL AREA DURING THE SAME TIME PERIOD. PLEASE
NOTE THAT TERRACON DOES NOT WARRANT ME WORK OF THIRD PARTIES SUPPLYING INFORMATION USED IN THE
OF WORK AGREED WITH YOU, OUR CLIENT, AS REFLECTED IN OUR PROPOSAL
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1.0 ROOF UNTEDREGENERAMV BLOWERSYSTEM(SEEDUNLSI&2SHEETVMS-5)
A THE PROPOSED ACTIVE VMS SYSTEM MAY UTILIZE A MINIMUM OF TWO RADIAL BLOWERS TO DRAW A VACUUM FROM
EXTRACTION LATERALS BENEATH THE BUILDING'S FLOOR SLAB. THE BLOWER PERFORMANCE WILL MEET A FLOW OF 300
STANDARG CUBIC FEET PER MINUTE (SCFM) AND 100 CFM AT 11 IN. WC. (PLUS ANY LOSSES IN PIPELINE) AT THE SYSTEM
RISERS. THE BLOWERS SHALL BE DESIGNED TO BE INTRINSICALLY SAFE TO EXPLOSIVE GASES AND ADJUSTABLE TO
ALLOW FOR VARIABLE AIRFLOW. INTERNAL COMPONENTS MUST BE COMPRISED OF WO PARKINGMATERIALS.
B. THE INSTALLATION AREA FOR THE BLOWER SHALL BE CLASSIFIED AS CLASS 2, DIVISION 2, ELECTRICAL HAZARDOUS AREA
AS DEFINED BY THE NATIONAL ELECTRIC CODE (NEC). ALL HELD WIRING, BLOWERS, AND SENSOR SCOTCHES SHALL BE
RATEDACCEPTABLE FOR INSTALLATION INSIDE A CLASS 2 DIVISION 2 HAZARDOUS LOCATION AS DEFINED BY THE NEC.
C. THE BLOWERS SHALL BE UL LISTED AND RATED FOR CONTINUOUS, ALL WEATHER OPERATIONS, WITH A THERMAL
OVERLOAD WITHAUTOMATICRESET FEATURES IN THE E OFAPOWER FAILURE.
D. THE BLOWERS SHALL HAVE A MINIMUM 104MONTH MANUFACTURERS WARRANTY ON PARTS AND LABOR.
E. THE BLOWER UNITS WILL INCLUDE A DURABLE, WEATHER-PROOF, UVRESISTANT ENCLOSURE, WHICH WILL HOUSE THE
BLOWERS, CONDENSATE BYPASS, MANUAL STOP, AND OTHER CONTROLS AND EQUIPMENT ASSOCIATED WITH THE
SYSTEM. THE ENCLOSURE WILL BE MOUNTED ON A FRAME AND SECURED IN A MANNER THAT MINIMIZES THE TRANSFER OF
VIBRATIONS TO THE STRUCTURE.
F. ACCEPTABLEBLOWERANDMANUFACTURER:
OBAR GBR 89 HA COMPACT RADIAL BLOWER; OBAR SYSTEMS INC, NEWFOUNDLAND, NJ 0T . 14M 969822T OR
EQUIVALE-
G. THE CONTRACTOR SHALL PROVIDE ELECTRICAL SERVICE BY A LICENSED ELECTRICIAN TO EACH BLOWER AND..........�
ASSOCIATED EQUIPMENT. ELECTRICAL WIRING, CONDUIT. AND CONNECTIONS SHALL BE PROVIDED IN ACCORDANCE WITH
APPLICABLE BUILDING CODE REQUIREMENTS. THE BLOWER WILL REQUIRE A DEDICATED Z2 VOLT CIRCUIT AND BACKUP
POWER SUPPLY. O� go4A
H. VERTICAL PIPING WILL TRANSITION LATERALLY BELOW THE ROOF DECK PRIOR TO EXTNNG THE ROOF TO THE BLOWER e
(SEE DETAILS I AND 2, SHEET VMSHALE S-5). PIPING SHABE MANIFOLDED AS TWO EXTRACTION POINTS PER BLOWER UNIT.
I. THE INFLUENT WILL PASS THROUGH AN AIRAVATER SEPARATOR TO REMOVE CONDENSATION, AND A PARTICULATE FILTER "�weTOpOe
BEFORE REACHING THE BLOWERS. cc
J. EACH BLOWER DISCHARGE WILL BE CONNECTED TO AN EXHAUST STACK IN ACCORDANCE WITH THE MANUFACTURERS C / T� Z
RECOMMENDATIONS AND IN ACCORDANCE WITH APPLICABLE CODES. AN EXHAUST STACK AT THE TERMINATION OF THE L u v J
VENT PIPE SHALL BE INSTALLED IN ACCORDANCE WITH MANUFACTUREM RECOMMENDATIONS.
ui z 0
K. THE BLOWER DISCHARGE SHALL BE LOCATED AT A DISTANCE OF NOT LESS THAN 15 FEET FROM ANY BUILDING AIR INTAKE. En Q V
3 FEET FROM ANY PROPERTY LINE, AND A MINIMUM OF 5 FEET FROM ANY ELECTRICAL DEVICE. Ir w J _
Lu J H
L VACUUM PRESSURE FOR EACH BLOWER UNIT SHALL BE MEASURED USING PRESSURE DIFFERENTIAL MAGNEHELIC 3: O O
GAUGES, THE PRESSURE WILL BE MEASURED IN -LINE AND CONNECTED TO &X-INCH OD VINYL TUBING ROUTED TO O
MAGNEHELIC GAUGES CAPABLE OF MEASURING 0. INCHES OF WATER DIFFERENTIAL THESE GAUGES WILL BE MOUNTED = r 1
IN THE BLOWER ENCLOSURE. mui
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ACCEPTABLE MAGNEHELC GAUGE: ASHCROFT TYPE 11S44 Q' LOW PRESSURE DIFFERENTIAL GAUGE OR EQUIVALENT w
WWW. ASHCROFT.COM
Z (D (D
M. AT BLOWER EXHAUST PIPES, A PERMANENT LABEL SHALL BE AFFIXED TO THE BLOWER EXHAUST READING: WARNING - W SOO
IL GAS VENT STACK MAY CONTAIN HIGH LEVELS OF VOCS, DO NOT PLACE AIR INTAKE W N 15 FEET' Z
w LLJ `c J o
2.8 ALARM SENSORS AND CONTROL PANEL CIDO
O 7 In
A A LOW VACUUM PRESSURE SWITCH AND A THERMAL OVERLOAD SHALL BE INSTALLED AT THE BLOWER COMPONENTS. O U L E10
THESE COMPONENTS MUST BE CALIBRATED BY THE INSTALLER IN ACCORDANCE WITH THE MANUFACTURER ui J T J
REQUIREMENTS. y Z
_UUw ALARM B. AUDIBLE AND VISUAL S SHALL BE MOUNTED ON THE EXTERIOR OF THE BLOWER CONTROL PANEL AND BLOWER O w
UNITS. THIS ALARM WILL BE ACTIVATED IN THE EVENT A BLOWER CEASES TO OPERATE. AUDIBLE ALARM SHALL BE AT
LEAST 60 DECIBELS IN VOLUME. LIGHT INTENSITY SHALL BE RATED AT LEAST 186 CANDELA /=
C. IF THE THERMAL OVERLOAD INDICATES OPERATION OUTSIDE OF THE BLOWER MANUFACTURERS OPERATING RANGE, THE O v 1 �
OVERLOAD SENSOR WILL SEND A SIGNAL TO A CONTROL PANEL TO SHUT DOWN THE SYSTEM. � piW
D. IF THE VACUUM WITHIN THE SYSTEM FALLS BELOW 025 INCHES WATER COLUMN, THE PRESSURE SWITCH WILL SEND A En
SIGNAL TO A CONTROL PANEL, ACTIVATING THE AUDIBLE AND VISUAL ALARMS. ui Q I..L
E. A SYSTEM CONTROL PANEL SHALL BE INSTALLED TO INTEGRATE THE THERMAL OVERLOAD, VACUUM SENSOR, BLOWER O I
CONTROL, AND ALARMS. THE CONTROL PANEL SHALL BE HARDWIRED TO THE BUILDING NORMAL POWER AND WILL BE J
LOCATED IN A CENTRALIZED PORTION OF THE BUILDING ASAPPROVED BUILDING OWNER AND VMS DESIGNER. Q Q
F. THE SYSTEM WILL HAVE THE CAPABILITY TO SEND AN ALARM SIGNAL TO THE BUILDING ALARM SYSTEM AND/OR OTHER w T T I
COMMUNICATION EQUIPMENT(AUTODIALER OR MODEM)IFAPPROVED BY THE BUILDING OWNER. Z T71
LU
Z
G. PROPER WIRING FOR POWER AND COMMUNICATION TO ALL ELECTRICAL DEVICES SHOULD BE CONFIRMED BY THE
ELECTRICAL ENGINEER AND INCLUDED ON THE PROJECT ELECTRICAL DRAWINGS.
H. A SYSTEM OPERATIONS AND MAINTENANCE (O&M) MANUAL SHALL BE PROVIDED WT THE CONTROL PANEL DESCRIBING
THE INSTALLATION, WIRING, OPERATION, TESTING, AND MAINTENANCE.
2 m
3A BLOWER INSTALLATION ate+
En W 4
o A. INSTALL BLOWER UNITS, TO INCLUDE BLOWERS, ENCLOSURES, ROOF -MOUNTS AND SUPPORTS, FRAME, CONTROLS. li
ALARMS, GAUGES, OPERATIONAL EQUIPMENT.
r
B. THE UNITS SHALL BE TESTED FOR PROPER OPERATION. SYSTEM FLOW AND WILL BE ADJUSTED AT EACH BLOWER UNIT TO
c DETERMINEOPTMAL OPERATING RANGESAND FLOW RATES WHILE MAINTAINING AMINIMUM VACUUM PRESSUREOF 0.000- m m
o OF WATER ACROSS THE FLOOR SLAB. A BLOWER UNIT DETAIL IS PROVIDED AS DETAIL 1, VMSJ .
cc
.� C. THE OWNER SHALL PROVIDE ELECTRICAL SERVICE BY A LICENSED ELECTRICIAN TO EACH BLOWER AND ASSOCIATED (!�1
EQUIPMENT. ELECTRICAL WIRING AND CONNECTIONS SHALL BE PROVIDED IN ACCORDANCE WITH APPLICABLE BUILDING Q)
u
CODE REQUIREMENTS.
L0 ON -SITE COMMUNICATION TEST
A. ACOMMUNICATION TEST WILLBE CONDUCTED TO EVALUATETHEABILITY OF THE PROPOSED BLOWERANDSUB SLAB SOIL
O AGGREGATE TO TRANSMIT COLLECTED SOIL VAPORS TO THE ANTICIPATED EXTRACTION POINTS, AND TO DETERMINE THE n C =
O OPTIMAL SIZING OF THE BLOWER UNIT. THE TEST WILL BE CONDUCTED ON A EACH OF THE FOUR RISERS CONSTRUCTED �w J� w' N
FOR THE VMS. THE INSTALLED VAPOR MONITORING PROBES LOCATED AT VARYING DISTANCES FROM THE VENT PIPING
WILL BE USED TO EVALUATE THE EXTENT OFTHE EFFECTIVE PRESSURE FIELD UNDER THE SLAB. /n
4Sh O O
C B. A REPORT OF TESTING WILL BE ISSUED TO DOCUMENT THE TESTING RESULTS AND PROVIDE RECOMMENDATIONS FORTHE U F
r BLOWER SYSTEM, SIZING, AND LOCATION&
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Legend
C : = Extent of VMS Membrane
------- 4-inch Slotted SCH 40 PVC Vapor Collection Piping
F 11 6-inch Vertical Riser Pipe
vP-1 Vapor Pin Sampling Point (Detail 21 Sheet VMS-3)
4-inch Solid SCH 40 PVC Transition Pipe
1 VMS MEMBRANE AND VENT PIPE LAYOUT
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PROTECTIVE GEOTEXTILE LAYER ,
ASPHALTIC MEMBRANE (60MIL)
Ix oTroe DErals BASE GEOTEXTILE LAYER
. ° CONCRETESLAB c°
PROTECTIVE GEOTEXTILE LAYER
ASPHALTIC MEMBRNE60 MIL REFERRED TO AS
MINIMUM DRY THICKNESS VMS MEMBRANE"
M BASE GEOTEILE LAYER IN OTHER DETAILS
,'AGGREGATE UNDER VMS MEMBRANE
t�t�ttUt�Ai tS[J 4• SLOTTED 0-02UINCH SCH 40 PVC PIPE
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PIPE
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OON—C SUBGRADEPER
1 SoUBS LAB VENTSYSTEM OETECHNIcgL REQUIREMENTS
1 I VMS MEMBRANE CONFIGURATION
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VMS MEMBRANE (SEE DETAILS I & 2, SHEET VMS-3)
-3
I I•I
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I MEET VM"
WATERPTIlEmVMSMOSEE ETA­FINGM DBE q STEEL COLUMN
9 MS MEMBRANE
ATERIAL (SEE DETAILS t &2, SHEET MS3)
CONCRETE SLAB PROTECTIVE GEOTEXTILE LAYER
ASPHALTIC MEMBRANE (M MILT
BASE GEOMXnEE LAYER
4- AGGREGATE BELOW MS MEMBRANE
6"
a CONCRETE FOOTING ASPHALTIC MEMBRANE (W MIL)
TYPICAL HORIZONTAL MEMBRANE TERMINATION
V I,DSG4t�
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MEMERANETERMINATON
(SEE DETAIL r. SHEET VMS-3)
"n 01'
i
7
CONCRETE
WALL
CONCRETE
6" SLAB
a4 PROTECTIVE GEOTEXTILE LAYER
ASPHPLTIC MEMBRANE (II0 MIL)
`� BASE GEOTEXTILE LAYER
`� 4"AGGREGATE BELOW MS MEMBRANE
9 ASPHALTIC MEMBRNE I. MIL)
TYPICAL VERTICAL MEMBRANE TERMINATION
(7D xoTTosc4LE
MS MEMBRANE
(SEE DETAILS 1 & 2, SHEET MS3)
P AGGREGATE BELOW
MS MEMBRANE
- TYPICAL HORZONTAL
EXTERIOR SLAB WITH SLOPE ° MEMBRNETERMINATION
AWAY FROM BUILDING 4' AGGREGATE BELOW VMS (SEE DETAIL fi, SHEET MS3)
4' AGGREGATE BELOW '��'� �'�'
VMS MEMBRANE WATERPROOFING MATERIAL MEMBRANE
MUST BE COMPATIBLE NTH
THE VMS VOcRE3IMEMB11 DBE VMS MEMBRANESEE DETAILS1
STAM & 2, SHEET MS3
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VMSGMEMBRA�NEAsT INTTERIR�COL�UMN FOOTING
FURNISH PLACARD ON VENT RISER APPROXIMATELY
VMSoME�MBRA�N'-E AT EXTERIOR
EVERY 5 AND ON N FEET ON EXPOSED PIPING
(SEEDETAIET AND N VMS3)
1WALL �FOOTING
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FURNIMSAMPLEPORTTHR, N
E DETAIL 22,SHEETMS31
INMRIORWALL-4-GASTIGHT
1': 12-ACCESSPANELMEDIUMSECURTY
THREADED CONNECTION KRTH
REMOVABLE MALE THREADED PLUG
(SEE DETAIL 4, SHEET VMS-3)
(SEE DETAIL 25, SHEET VMS-3)
VMS MEMBRANE PENETRATION
(SEE DETAIL 3, SHEET VMS-3)
MSMEMBRANE
>v. MSMEMBRANE
(SEE DETAILS I&2, SHEET MS3)
(SEE DETAILS 1 & 2,
—
TAGGREGATE BELOW
8 MEE—S-S)
VMS MEMBRANE
' MSMEMBRANE
a' AGGREGATE BELOW
4-INCH LAYER OF
8" IAMETERSCH.40PVC
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MS MEMBRANE
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SITION PIPE
MSMEMBRANE PENETRATION
TRNSITION TO STEEL OR CAST
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) °
IRONNPHUBCOUPUNG
NOTE:
8/$TEFL OR CAST IRON ELBOW n
FLOOR DRNN LOCATIONS ARE NOT SHOWN ON SHEET VMS-2. SEE PLUMBING PLANS FOR LOCATIONS.
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T�YPIoCAL VMS MEMBsRANEAo TF TREND DRAIN ° °
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TERMINATION
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/ Anr,
MS MEMBRNETRNBRION TO VMS
WATERPROOFING SYSTEM
SURROUNDING ELEVATOR PIT (INSTALL
PER MANUFACTURERS INSTRUCTIONS
AND PROJECT ARCHITECTURAL PLANS)
METAL STUD WALL
IT
VMS MEMBRANE
($EE DETAILS 1$ 2, SHEEP MS3)
,INCH LAYER OF AGGREGATE
BELOW MS MEMBRANE
VMS MEMBRANE TRA43rtION TO VMS
WATERPROOFINGSYSTEM
SURROUNDING ELEVATOR PR (INSTALL
PER MANUFACTURERS INSTRO-ONS
l'--INSTALL-PERMANUFACTURERS
AND PROJECT ARCHITECTURAL PLANS)
MS WATERPROOFING SYSTEM
NSTRUCTIONSANDPROJECT
THREADED STAINLESS STEEL
t-AINCHDIAMETER — COVERINSTALLFLUMWRH
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VAPOR PIN SAMPLE POINT DETAIL
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LENGTH AND WIDTH OF CONCRETE
SHALL EXTEND A MINIMUM OF
PROTECTIVE 8-INCHES FROM THE OUTSIDE EDGE
GEOTEXTILE LAYER OF PENETRATIONS
ASPHALTIC MEMBRANE SPRAY APPLY OR HAND TROWEL
BASE GEOTEXTILE LAYER 60 MILASFYALTIC MEMBRANE TO
r VMS MEMBRANE AND IN-BETWEEN
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—MEMBRANE
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FURNISH PLACARD ON VENT RSER APPROXIMATELY
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(SEE DEFAIL 24, SHEET MS3)
FURNISH SAM LEPORTTHRUUGH
INTERIORWALLWITHPGASTIGHT
12•x 1TACCESSPANELMEDIUMSECURITY
THREADED CONNECTION WITH
REMOVABLE MALE THREADED PLUG
(SEE DETAIL 25, SHEET MS3)
(SEE DETAIL 25, SHEET MS3)
1
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S' AMETER STEEL ORCAST IRON VENT RISER
(SEE DETAIL 3, SHEET MS3)1
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WATER TIGHT SWITCH
FURNISH PLACARD ON VENT RISER
APPROXIMATELY EVERY 5 FEET AND ON ANY
EXPOSED PIPE (SEE DETAIL 25, SHEET VMS-3)
ELECTRICAL CONDU
ALARM OR VISUAL LOW VACUUM ALARM
7 ON EXTERIOR OF CONTROL PANEL
ALUMINUM FRAME
A'UNISTRUT
_-RUBBER COUPLER RADIAL BLOWER:
_-STEEL CLAMPS OBAR GBR 76 HO
-4"PVC PIPE WWW.OBARSYSTEMS.COM
-ROOF BOOT OR EQUIVALENT
BLOWER UNITS
(SEE DETAIL 1, SHEET VMS-5)
gj��ROOFPENIETRATION TO VENTILATOR
(SEE DETAIL 1, SHEET VM")
ROOF DECK
4\FURNISH PLACARD ON VENT RISER
APPROXIMATELY EVERY 5 FEET AND ON ANY
EXPOSED PIPE (SEE DETAIL 25. SHEET VMS3)\/vv
1 6" TEEL OR CAST IRON PIPE (2%POSITIVE
LOPE MIN. TO ALLOW UPWI AIRFLOW)
6' HREADED STEEL OR
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1 8" HREADED STEEL OR CAST IRON 90° ELBOWJ//
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(1 BLOWER UNITDETAIL 6-INCH VERTICAL STEEL OR CAST IRON 1
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Legend ROOF RISER TRANSITION LAYOUT
vR3 • Riser Pipe J D 4 8 16 24
Vertical to Horizontal Transition Below Roof Deck
Approximate Scale in Feet

APPENDIX B
SOIL VAPOR SETUP

Soil Vapor Sampling Guide
Sample Manifold Configuration
Reads pressure at
sample point
Male Fitting
(to sample point)
Female Fitting
(to sample can)
A. Deadhead/Shut-In Test
1. Connect manifold to sample can
2. Make sure fittings and caps are tight, then use hand pump
to generate vacuum >15 in Hg. Watch gauges.
�1 ,open valve
hand
.7
sample
can
Holds vacuum?
yes -> proceed to helium tracer test
no -> vgnien rltungs ana try again
Legend
backflow preventer
FC flow controller
© cap
N❑ nut and ferrule (Swagelok or equivalent)
*/ OQ summa canister shut-off valve (closed/open)
/ sampling train shut-off valve (closed/open)
Opressure gauge
C. Sample Collection
1. Close sampling train shut-off valve
z. Open sample can and note time and vacuum at start. Note
vacuum at regular intervals -
Do not let vacuum go to zero
3. Shut off can when vacuum at -5 in Hg.
4. Sampling is complete. Remove and cap sample can.
Abandon & patch sampling point (if temporary).
Irerracon
Shut-off valve allows isolation during sampling
(prevents cross -contamination from ambient and purged air)
Male Fitting
(to purge device)
Leads pressure in
sample can
B. Helium Tracer Test
1. Connect to soil vapor point and place shroud over.
2. Enrich shroud with -15% helium (He). Record He concentration
and begin purging with syringe or hand pump
3. Purge a total of three volumes. At end of each volume, purge
into tedlar bag. Record He concentration in shroud.
4. Record He concentration in shroud and in tedlar bag
-15% Helium 1
N b
FC
Pum
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Record He
in shroud at
sample
start and end
can
of each purge
3-way Check He
valve in tedlar
after each
urge vol
tie,�a9
Helium concentration in tubing >10% of shroud (i.e. >1,500 ppb=1.5%)?
no -> proceed to sampling
yes -> leak test failed - tighten connection to sample & try again