DERR-2024-006529

SITE MANAGEMENT
PLAN
Murray Fire Station
4848 South Box Elder Street, Murray,
Utah
Utah Voluntary Cleanup Program Facility
ID #C093
November 29, 2023 | Terracon Project No. 61237090
Prepared for:
Redevelopment Agency of Murray City
5025 South State Street, Murray, Utah
6952 South High Tech Drive
Midvale, Utah 84057
P [phone]
Terracon.com
Facilities |Environmental |Geotechnical | Materials i
November 29, 2023
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
Voluntary Cleanup Program
P.O. Box 144840
195 North 1950 West
Salt Lake City, Utah 84114-4840
Attn: Ms. Leigh Anderson
P: [phone]
E:[e-mail]
Re: Re:Site Management Plan
Murray City Fire Station
(formerly known as Utah Transit Authority Lots–VCP Site #C093)
4848 South Box Elder Street, Murray, Utah
Terracon Project No. 61237090
Dear Ms. Anderson:
On behalf of our client, the Redevelopment Agency (RDA) of Murray City, Terracon is pleased
to provide this Site Management Plan (SMP) for the above-referenced site. Terracon has
completed this SMP based upon the findings in the Final Remedial Action Plan (RAP)
Implementation Report and Vapor Mitigation System Installation Observations letter (dated
June 30, 2020).
Please contact our office at [phone] if you have questions regarding this
information.
Sincerely,
Terracon Consultants, Inc.
Andrew S. Turner Andy R. King
Project Manager Authorized Project Reviewer
Environmental Services
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials ii
TABLE OF CONTENTS
1.0 INTRODUCTION ........................................................................... 1
1.1 Site Description ..................................................................................... 1
1.2 Project Background ................................................................................ 1
1.3 Remedial Action ..................................................................................... 2
2.0 INSTITUTIONAL CONTROLS ........................................................... 4
2.1 Environmental Covenant ......................................................................... 4
2.2 Land Use Limitations .............................................................................. 4
3.0 ENGINEERING CONTROLS ............................................................. 4
3.1 Vapor Mitigation System ......................................................................... 4
3.2 Protective Cover System ......................................................................... 5
4.0 SITE MANAGEMENT ...................................................................... 5
4.1 Soil Excavation ...................................................................................... 5
4.2 Retention Pond Inspections ..................................................................... 6
4.3 Hardscape and Landscaped Area Inspections ............................................. 6
4.4 VMS Inspections, Operations and Maintenance ........................................... 7
4.5 Worker Health and Safety Requirements ................................................... 8
4.6 Contingency Plan ................................................................................... 8
4.7 Notification ............................................................................................ 8
5.0 REFERENCES ............................................................................... 9
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials iii
APPENDICES
Appendix A Exhibits
Exhibit 1 Topographic Site Overview
Exhibit 2 Site Map
Exhibit 3 Final Grade Sample Locations
Appendix B Parcel Information and Description
Appendix C Sheet VMS-4 (VMS)
Appendix D Vapor Mitigation Installation Observation Letter Report
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental | Geotechnical |Materials 1
1.0 Introduction
1.1 Site Description
Site Name Murray Fire Station
Site Location/Address 4848 South Box Elder Street, Murray, Utah
General Site
Description
The site is comprised of one parcel (Salt Lake County parcel
21-12-230-043) totaling approximately 1.72-acres of land.
Exhibit 1 (Appendix A) presents the site location on a portion of the United States Geologic
Survey (USGS) 7.5-minute series topographic map.Exhibit 2 (Appendix A) depicts a general
site overview of the property.
The Murray City Redevelopment Agency (RDA) completed a remedial action under the Utah
Department of Environmental Quality (UDEQ), Division of Environmental Response and
Remediation’s (DERRs) Voluntary Cleanup Program (VCP) on the northern portion of the
former UTA Lots property (now the Murray Fire Station, Salt Lake County Assessor Parcel
No. 21-12-230-043). The purpose of the Site Management Plan (SMP) is to provide
guidance to maintain the protectiveness of the remedial action conducted at the site.
It should be noted that the site address and parcel number has been updated by the Salt
Lake County Assessor now that the fire station has been built on the site. The new address,
4848 South Box Elder Street replaces the 4800 and 4822 South Box Elder Street addresses
mentioned in previous reports and in the VCP. The parcel number presented above replaces
any previous parcel numbers provided. This SMP covers this updated address and the
updated property information as provided.
This SMP applies specifically to the Fire Station portion of the VCP site, which also originally
included the vacant property to the south. The two properties were separated in order to
get final closure for the northern fire station property, and the VCP application was
amended to only include the northern property (fire station parcel). This SMP is explicitly
defined as Exhibit A of the Environmental Covenant (EC) to be recorded on this parcel. This
SMP and the EC will also be incorporated into the final Certificate of Completion issued by
the UDEQ when the remediation of the entire VCP site is completed.
1.2 Project Background
The Murray Fire Station property occupies an approximately 1.72-acre property addressed
as 4848 South Box Elder Street, Murray, Utah (Appendix A;Exhibit 1 and Exhibit 2). The
remediation project area includes the area defined as “the Murray Fire Station.” Property
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials 2
information from the Salt Lake County Assessor’s Office is provided in Appendix B (Lot 1,
Parcel No. 21-12-230-043). The site is owned by the Redevelopment Agency of Murray City,
and the anticipated future use of the site is a fire station.
Elevated concentrations of arsenic and lead were reported in fill material covering much of
the site and to a lesser extent, underlying native soils. Concentrations exceeded the United
States Environmental Protection Agency’s (EPA) November 2022 Regional Screening Levels
(RSLs) for commercial properties. Groundwater at the site has been impacted by arsenic
and lead at concentrations above the EPAs current Maximum Contaminant Levels (MCLs) for
drinking water for these metals (0.010 mg/L and 0.015 mg/L, respectively).
Petroleum hydrocarbons were detected in soils and groundwater along the east and
northeast portion of the property. In general, concentrations of petroleum hydrocarbons in
soils were below DERRs Initial Screening Levels (ISLs), with the exception of soils from BH-
4. A sample collected from 15 feet below the ground surface (bgs) from BH-4 reported total
petroleum hydrocarbons in the gasoline range (TPH-GRO) at 310 mg/kg, which exceeds the
ISL of 150 mg/kg. Based on field screening of continuous soil samples from the borings,
VOCs measured with the photoionization detector (PID) were not encountered in soils above
9 feet bgs and were more commonly observed in soils from 12.5 feet bgs to 14 bgs within
the capillary fringe zone. As such, soil impacts from petroleum hydrocarbons are not
expected to affect the future planned land use.
Concentrations of TPH-GRO, total petroleum hydrocarbons in the diesel range (TPH-DRO),
benzene, and ethylbenzene in groundwater exceed DERR’s ISLs in some locations. Based on
the measured direction of groundwater flow at the site to the southwest, the source of the
petroleum hydrocarbons appears to be off-site. Institutional controls will be recorded to limit
use of groundwater on-site. At some locations, concentrations of benzene, ethylbenzene,
naphthalene, and 1,2,4-trimethylbenzene in groundwater exceed EPAs November 2022
Target Groundwater Concentration Vapor Intrusion Screening Levels for commercial land
use (VISLs, based on EPAs November 2022 RSLs), indicating a potential risk of vapor
intrusion exists due to impacted groundwater.
1.3 Remedial Action
The RDA entered into Utah’s VCP to address the remediation of impacted soils and
groundwater. At the request of the RDA, Terracon developed a Remedial Action Plan (RAP;
Terracon; November 8, 2018) to address impacted soils, groundwater, and soil vapor
impacts. The RAP was then implemented extending to February 2020, and consisted of the
following:
Capping of Impacted soils:installation of a protective cover, consisting of
building, hardscaping, one-and-one-half feet of clean fill, or a geotextile
fabric/cobble unit for all portions of the site.
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials 3
Confirmation Soil Sampling: collection of soil samples for laboratory analyses to
document concentrations of any remaining contaminates of concern. A diagram
showing the confirmation sampling locations is included in (Appendix A)Exhibit 3.
Vapor mitigation: installation of a vapor mitigation system for all occupied
buildings on-site.
The contaminants of concern for the site and their respective Updated Cleanup Levels from
the Final Remedial Action Plan Implementation Report (dated June 30, 2020) are listed in
the table below.
Contaminant of Concern Affected Media
Updated Cleanup
Levels
Lead Soil 800 mg/kg(1)
Arsenic Soil 50 mg/kg(2)
Volatile Organic Compounds
Benzene Groundwater 0.00693 mg/l(3)
Ethylbenzene Groundwater 0.0152 mg/l(3)
Naphthalene Groundwater 0.0201 mg/l(3)
1,2,4-Trimethylbenzene Groundwater 1.470 mg/l(3)
1)EPA’s November 2022 RSLs for residential soil using a Target Cancer Risk of one in a million
and a non-cancer Hazard Quotient of 1.
2)Native arsenic concentrations in soil in Utah have been found to be well above EPAs November
2022 RSLs for residential soil of 0.67 mg/kg. Mean background concentrations for arsenic in
the region have been found to range from 5.5 to 14.9 mg/kg with a standard deviation up to
8.3 mg/kg (USGS 1984, USGS 2001). Numerous risk-assessments for arsenic in commercial
and residential site soils, such as the Kennecott Bingham Creek and Murray Smelter projects,
have also established risk-based clean-up levels above 100 mg/kg. To be conservative, half of
the typical lower risk-based screening level for arsenic (100 mg/kg) discussed above will be
utilized for the Cleanup Level.
3)These cleanup levels correspond to EPA’s November 2022 Target Groundwater Concentration
Vapor Intrusion Screening Levels (VISLs) for commercial land use.
The RAP Implementation Report (dated June 30, 2020) was prepared by Terracon to
document the completion of the RAP activities. The report documented concentrations of
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials 4
contaminates of concern remaining above the EPAs commercial RSLs for the site in
excavation wall and floor samples. Based on the findings, as detailed in the RAP
Implementation Report, this Site Management Plan assumes concentrations that exceed
Cleanup Levels could be present in any location at the extent of the excavation.
A Vapor Mitigation System Installation Observations letter, included as Appendix D of the
RAP Implementation Report (June 30, 2020), documented the installation of the vapor
mitigation system (VMS) and provided as-built drawings and photographs of the system
components.
2.0 Institutional Controls
2.1 Environmental Covenant
The RDA will work with the UDEQ to prepare an EC that outlines the continuing obligations
and limitations associated with impacted soils remaining at the site. The EC will also address
the potential for vapor mitigation at the site through an Institutional Control limiting the
acceptable land uses of development of the site. The EC will be recorded on the site’s title
by the Redevelopment Agency of Murray City.
2.2 Land Use Limitations
Use of the Property is for commercial use only.
Commercial land use consisting of a fire station (with living quarters on the second floor) is
allowed based on the elimination of the exposure pathway from impacted soils to occupants
of the fire station by capping the materials with either the fire station building, hardscaping,
or 1.5 feet of clean fill in areas of landscaping, and operation of the VMS in the occupied
portion of the fire station building.
In the event additional occupied buildings are constructed on the site, or if the site is
otherwise redeveloped, the requirements for vapor mitigation will need to be re-evaluated
and discussed with and approved by the VCP. In addition, use of groundwater for drinking
water, irrigation, or bathing purposes is prohibited.
3.0 Engineering Controls
3.1 Vapor Mitigation System
The VMS was constructed at the site to mitigate the risk of soil vapor intrusion into the
interior of the on-site occupied buildings. The VMS consists of a minimum of 4 inches of
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials 5
crushed rock, a low profile vent piping system, and a Geo-Seal® vapor membrane placed
directly beneath the concrete floor slab. The VMS was constructed prior to placement of the
floor slab, with the vent piping system routed through interior walls to the building rooftop.
The VMS was designed by Terracon and Terracon performed third-party Installation
Observations. Details of the VMS design and installation were provided in the Vapor
Mitigation Installation Observations letter report (Terracon; April 24, 2020) and included as
Appendix D of the Remedial Action Plan Implementation Report (dated June 30, 2020).
3.2 Protective Cover System
Impacted soils were observed across the site and as such, the surface of the project area
was capped with either structures, asphalt, or landscaped areas. Landscaped areas were
generally developed with a minimum of 1.5 feet of clean soils placed over impacted
materials. The contact between impacted and clean materials beneath the landscaped areas
was demarcated with orange-colored snow fencing, so that future construction workers at
the site are visually cued to the presence of the underlying impacted zone.
The only exception to the cover system described above was on the western slope of the
property and the sloped areas of the storm water detention pond where placing a minimum
of 1.5 feet of clean soil over impacted materials was not feasible. In these areas, the
surface was armored with a layer of black geotextile fabric. A six-inch layer of 2 to 4 inch
sized cobble was then placed on top of this fabric. This modification was approved by the
VCP prior to implementation.
4.0 Site Management
Results of confirmation soil samples collected from beneath the fire station building
footprint, from the retention pond, western slope, elevator pits, and grease trap excavations
show that elevated concentrations of lead and arsenic remain at the site. As such, the
following subsections outline required management actions to maintain the protectiveness
of the remedy.
4.1 Soil Excavation
As contaminates of concern below the protective covers remain in soils at concentrations
exceeding the Cleanup Levels, this Site Management Plan includes guidance for excavation
activities where the impacted soils could be encountered in the future. Based on the
findings, as detailed in the RAP Implementation Report, this Site Management Plan assumes
concentrations that exceed the Cleanup Levels) could be present in any location on the site.
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials 6
Construction activities and other unforeseen events that may result in disturbances to
impacted soil will require the RDA to submit a work plan for approval by the UDEQ to
properly manage the excavated materials, reconstruct affected components to maintain the
function of the cover system and VMS, and prevent offsite migration of contaminated
media. The work plan shall include construction worker notification, safety measures, and
appropriate soil waste characterization and disposal requirements, if required. While the
RDA cannot control off-site activities, it is recommended that any off-site excavations that
could encroach onto the site (e.g., underground utility repairs or new underground utilities
that could be brought to the site) be observed to ensure off-site soils do not come onto the
site.
Impacted soils to be transported off-site may require characterization by sampling and
laboratory analysis prior to approval for off-site disposal. Characterization of the soils will
determine the proper disposal methods. In all cases, soil must be disposed of in a lawful
manner consistent with all pertinent federal, state, and local environmental laws, and
documentation must be provided to the UDEQ. In the event that sampling activities are
required to be conducted, all sampling must be performed by qualified personnel. Samples
must be analyzed by state-certified laboratories and quality assurance procedures from the
Murray RDA Quality Assurance Project Plan should be followed as appropriate.
4.2 Retention Pond Inspections
The surfaces of the western sloped boundary and the retention pond are capped with a
geotextile fabric and 6 inches of 2 to 4 inch sized cobble. A designated person, familiar with
this management plan, should visually inspect this cap annually (at a minimum) to ensure
the proper thickness of cobble remains in place and there are no indication of tears in the
fabric. Any loss of apparent integrity to these cover systems will be repaired, with
documentation of the repairs reported to UDEQ.
4.3 Hardscape and Landscaped Area Inspections
Landscaped areas were generally developed with a minimum of 1.5 feet of clean soils placed
over impacted materials. A designated person, familiar with this management plan, should
visually inspect these landscaped areas to ensure the proper thickness of clean soil remains
in place and there is no indication of impacted materials present. Any loss of apparent clean
soil thickness will be rectified, with documentation reported to UDEQ.
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials 7
4.4 VMS Inspections, Operations and Maintenance
A person shall be designated to perform the duties outlined in this section. That person
should be familiar with the VMS and knowledgeable about this management plan. The
designated person shall inspect the VMS components on an annual basis.
Observations should be described on a dated and signed form that is retained for record
keeping purposes. If any of the components of the VMS require maintenance or repairs, the
designated person shall notify Terracon or other qualified consultant and record the actions
taken. The VMS components to be inspected are as follows:
Vapor Barrier:Future construction activities (e.g., cutting, drilling, or hammering into the
building slab; removal of building floor slabs; or alterations that could expose the vapor
barrier) in the fire station building where the VMS was installed that could puncture or tear
the vapor barrier, which would reduce the effectiveness of the barrier. If such impacts
cannot practically be avoided, prior to implementing such building modifications, the UDEQ
will need to be contacted and a plan prepared to demonstrate how the vapor barrier will be
maintained or repaired, as necessary.
Vents:Vent pipes run upwards from beneath the building slab vertically through wall
cavities. The vent risers and associated passive venting turbines are located on the roof.
Refer to Appendix C, Sheet VMS-4 for the locations of each vent. The vents should be
visually inspected to ensure they are free of debris that may restrict the air flow through the
system and that all components are present and in working order.
Typical vent riser Typical vent turbine ventilator Typical vent turbine ventilator
(view from below)
Vertical pipe sample port:The sample ports and associated gate valves are located on
the piping sections on the roof, just below the turbine ventilators. The sample ports should
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials 8
be visually inspected to ensure the gate valves are in the open position (i.e., the handle is
turned all the way to the left, counterclockwise), which is necessary to allow air flow
through the passive system, the sampling port plug is in place and tight, and the vent pipes
are in good condition (i.e., no obvious damage, cracks, etc.).
Future construction activities (e.g., cutting, drilling, or hammering into wall cavities where
vertical vent lines exist or roof repairs around vent pipe risers) in occupied structures at the
site where the VMS was installed that could damage the vent lines or risers, which would
reduce the effectiveness of the VMS. Construction activities should be reviewed and
potential damage to the VMS should be avoided where practical. If building construction will
damage the VMS, the UDEQ will need to be contacted and a plan prepared to demonstrate
how the vent lines will be maintained or repaired, as necessary.
4.5 Worker Health and Safety Requirements
The RDA shall inform any workers conducting sub slab or subgrade work on the site of the
presence of the VMS and potential soil impacts that could be encountered on the property.
As appropriate, contractors that could come into contact with soil impacts should prepare
their own Health and Safety Plan that specifically addresses potential contaminants that
could be encountered and personal protective equipment (PPE) that is required. It will be
the contractor’s responsibility to ensure worker protection meets the Occupational Safety
and Health Administration’s (OSHA’s) requirements.
4.6 Contingency Plan
If unforeseen events or unexpected contamination are encountered, UDEQ will be notified
and a contingency plan will be developed in consultation with UDEQ to address the situation.
4.7 Notification
RDA shall notify UDEQ either by phone at [phone] or in writing at the address noted
below of any excavation into impacted soils. In addition to the SMP requirements, site
activities must comply with appropriate permitting authorities.
Project Manager, VCP ID# C093
Voluntary Cleanup/Brownfields Section
Division of Environmental Response and Remediation
Utah Department of Environmental Quality
P.O. Box 144840
Salt Lake City, Utah 84114-4840
[phone]
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental |Geotechnical | Materials 9
5.0 References
Terracon Consultants, Inc. 2017. Limited Site Investigation Report, Utah Transit Authority
Lots, 4800 South Box Elder Street, Murray, Salt Lake County, Utah, April 12.
Terracon Consultants, Inc. 2018. Supplemental Site Investigation, Utah Transit Authority
Lots, 4800 South Box Elder Street, Murray, Salt Lake County, Utah, April 10.
Terracon Consultants, Inc. 2018b. Remedial Action Plan, Utah Transit Authority Lots, 4800
South Box Elder Street, Murray, Salt Lake County, Utah, June 6.
Terracon Consultants, Inc. 2020. Vapor Mitigation Observations, Utah Transit Authority Lots,
4800 South Box Elder Street, Murray, Salt Lake County, Utah, April 24.
Terracon Consultants, Inc. 2020b. Remedial Action Plan Implementation, Utah Transit
Authority Lots, 4800 South Box Elder Street, Murray, Salt Lake County, Utah, June
30.
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental | Geotechnical | Materials
APPENDIX A
Exhibits
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental | Geotechnical | Materials
APPENDIX B
Parcel Information and Description
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental | Geotechnical | Materials
APPENDIX C
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DESIGNED BY:JSS/BKC
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SCALE:AS SHOWN
DATE:08/22/2018
JOB NO.61177111
ACAD NO:61177111 I
SHEET No.2 4 OF 4
Site Management Plan
Murray City Fire Station | Murray, Utah
November 29, 2023 | Terracon Project No. 61237090
Facilities |Environmental | Geotechnical | Materials
APPENDIX D
Vapor Mitigation Installation
Observation Letter Report
Terracon Consultants, Inc. 6494 South High Tech Drive Midvale, Utah
P [phone] terracon.com
April 24, 2020
Redevelopment Agency of Murray City
5025 South State Street
Murray, Utah 84107
Attn: Ms. Melinda Greenwood
Re: Murray City Fire Station Vapor Intrusion Mitigation System Installation Observations
4800 South Box Elder Street
Murray, Utah
Terracon Project No. 61177111
Dear Ms. Greenwood:
This report summarizes Vapor Intrusion Mitigation System (VIMS) installation and testing
activities observed by Terracon Consultants, Inc. (Terracon) at the subject property. The VIMS
was constructed to mitigate migration of volatile organic compounds identified in soil vapor into
the interior of the Murray City Fire Station building. A Geo-Seal® certified installer, Contractors
Waterproofing, Inc. (Contractors Waterproofing) installed the below-grade components of VIMS.
Terracon provided Geo-Seal® certified VIMS inspectors to observe the installation, record results
of VIMS membrane coupon and smoke tests, and document VIMS completion.
VIMS Installation Overview
The VIMS consists of three key components: (1) a passive vapor-collection system (low-profile
horizontal piping) embedded in a layer of granular substrate material (gravel) beneath the
concrete floor slab, (2) a VIMS membrane installed above the gravel layer (and beneath the floor
slab), and (3) vertical risers and piping to vent captured vapors above the building rooftop. No
VIMS membrane was installed in the Fire Station Engine Bay area as the concrete floor and
engineered, forced ventilation provide sufficient vapor removal for the area. Materials used for
the VIMS were manufactured by Land Science Technology under the trade name of Geo-Seal®
Vapor Intrusion Barrier. The VIMS design was completed by Terracon and is provided as Plans
& Specifications for Vapor Mitigation System in Appendix A.
The sub-slab VIMS components were installed during early construction phases of the Fire
Station building Sub-slab VIMS components were installed prior to concrete slab pouring and
finishing. A minimum of 4 inches of gravel was initially placed by the general contractor (GC) and
graded within the building footprint to provide a substrate layer for embedding the low-profile
vapor collection piping which was connected to 3-inch PVC header piping. The vapor
collection/header piping network was installed in the gravel layer and connected to risers installed
by the GC. The Geo-Seal® volatile vapor mitigation membrane was then installed above the
Vapor Mitigation System Installation Observations
Murray City Fire Station ■ Murray, Utah
April 24, 2020 ■ Terracon Project No. 61177111
Responsive ■ Resourceful ■ Reliable 2
gravel layer except as previously noted. - The Geo-Seal VIMS membrane consists of three
components: the BASE foundation layer; the spray-applied, asphaltic CORE layer; and, the
protective BOND layer. Following installation of these sub-slab VIMS components, the concrete
floor slabs were poured and finished by the GC. After additional building construction work, the
GC extended the nine (9) vertical risers through the walls to the building rooftop.
Field VIMS Installation, Observations & Testing
Contractors Waterproofing installed the horizontal collection and header piping network, the sub-
slab VIMS membrane and vapor riser components between April 4 and April 16, 2019. All VIMS
components were installed according to Terracon’s VIMS design documents (Appendix A) and
Land Science Technology’s Geo-Seal®VIMS installation specifications.
Observation and testing of the VIMS installation were conducted by Nancy Saunders and Mark
Lilly of Terracon, both Geo-Seal®Certified VIMS Inspectors. During that time, the gravel layer,
low-profile vent piping, and Geo-Seal® VIMS membrane installation activities were observed and
tested. The sub-slab VIMS membrane, the low-profile vent collection piping and associated PVC
manifold piping were installed under the building’s floor areas prior to pouring the concrete slabs.
As an exception, a VIMS membrane was not installed in truck bay area of the building. Above
floor grade piping, including vapor emission sampling ports and rooftop vents were completed by
the GC during subsequent building construction activities.
Following the spray application of Geo-Seal®CORE on the BASE layer, Terracon conducted
VIMS membrane coupon sampling to verify that the VIMS design-specified minimum CORE
thickness of 30 mils was met. Coupon samples were taken by the VIMS contractor at
approximately 500-square-feet intervals at 22 locations within the building’s footprint. The
approximate locations of the VIMS coupon testing are shown on the Exhibit in Appendix B. At
each coupon test location, an approximate 2-inch by 2-inch coupon was cut out of the VIMS
membrane and the thickness was measured using a digital caliper. Areas where coupon samples
did not meet the minimum specified CORE thickness of 30 mils were resprayed with CORE
material and re-measured. Upon completion of coupon testing and application of additional
CORE material as needed, each coupon test location was repaired per manufacturer
specifications. Following the above-describe procedure, the CORE thickness met or exceeded
the design-specified asphaltic CORE membrane thickness of 30 mils.
Smoke tests were subsequently performed to identify leaks in the VIMS membrane. Smoke tests
entailed using a smoke generator to introduce smoke under the BASE and CORE layers of the
membrane and inspection for visible leaks in the membrane. Leaks discovered during the smoke
testing activities were repaired by applying additional CORE material over the identified leak. The
area was then retested with a smoke test to verify the leak had been sealed.
Once smoke testing was completed and all leaks repaired, Contractors Waterproofing installed a
layer of Geo-Seal® BOND material on top of the asphaltic CORE layer to protect the CORE during
subsequent installation of reinforcing steel and pouring of the concrete slabs. A Figure which
identifies the VIMS Membrane Coupon Sample and Smoke Test Injection Locations is provided
Vapor Mitigation System Installation Observations
Murray City Fire Station ■ Murray, Utah
April 24, 2020 ■ Terracon Project No. 61177111
Responsive ■ Resourceful ■ Reliable 3
in Appendix B. The VIMS Membrane Installation Coupon and Smoke Testing results are
tabulated in the VIMS Observation Summary Table provided in Appendix C.
During subsequent building construction activities, flow control valves and sample ports were
installed above the roof-top at each of the vapor riser pipes by the GC; passive vents were then
installed at the terminus of each riser pipe. Following completion of building construction, an
inspection of vertical riser pipes, rooftop vents and sample ports was conducted on March 20 and
April 6, 2020. Above-grade VIMS component installations were completed in general accordance
with the VIMS design. A VIMS Installation Photographic Log documenting the VIMS installation
activities is provided in Appendix D. Copies of the VIMS membrane installation observation field
reports are provided in Appendix E.
Summary
The results of the VIMS installation observation activities and subsequent inspections conducted
by Terracon indicate that the VIMS installed at this site meets the requirements of Geo-Seal’s
specifications and Terracon’s VIMS Design. We appreciate the opportunity to conduct these
services for the Redevelopment Agency of Murray City. Please contact Michael Lane, Nancy
Saunders or Mark Lilly if you have questions regarding the information provided in this report.
General Comments
The observations and opinions expressed in this report are based upon the data obtained from
the points at the indicated locations and from other information discussed in this report. Results
of the testing do not reflect variations which may occur between or beyond the indicated locations.
Terracon makes no warranties, either express or implied, regarding the tasks conducted for this
assessment or the content of this report. This report has been prepared for the exclusive use and
reliance of Redevelopment Agency of Murray City for specific application to the VIMS installation
observations detailed in this report. Reliance, distribution, or re-use of this report by any other
party is prohibited without the express, written authorization of Terracon and Redevelopment
Agency of Murray City.
Vapor Mitigation System Installation Observations
Murray City Fire Station ■ Murray, Utah
April 24, 2020 ■ Terracon Project No. 61177111
Responsive ■ Resourceful ■ Reliable 4
Sincerely,
Terracon Consultants, Inc.
Michael Lane, P.E.Mark Lilly, P.G.
Project Environmental Engineer Senior Staff Geologist
Nancy Saunders
Senior Project Manager
ML/ML/NS/MEH
Appendices:
Appendix A - Terracon VIMS Design
Appendix B - VIMS Coupon Sample & Smoke Test Injection Locations
Appendix C - VIMS Observation Summary Table (VIMS Coupon & Smoke Test Results)
Appendix D - VIMS Installation Photographic Log
Appendix E - VIMS Membrane Installation Field Reports

Appendix A
Terracon VMS Design

PLANS &SPECIFICATIONS FOR
VAPOR MITIGATION SYSTEM
MURRAY CITY FIRE STATION SITE4800BOXELDERSTMURRAY.UTAH
PROJECT SITE LOCATION
INDEX OF SHEETS
VMS-1 TITLE SHEET AND GENERAL NOTES
VMS-2 VAPOR MITIGATION SYSTEM PLAN
VMS-3 VAPOR MITIGATION SYSTEM DETAILS
VMS-4 ROOF VENT PLANS AND DETAILS
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 US.DEPARTMENT OF LABOR AND ALL LOCAL AND
STATE REGULATIONS.
THE OWNER AND THE VMS DESIGNER SHALL NOT BE
RESPONSIBLE IN ANY WAY FOR CONTRACTORS AND
SUBCONTRACTORS COMPLIANCE WITH THE
"OCCUPATIONAL SAFETY AND HEALTH REGULATIONS“OF
THE US.DEPARTMENT OF LABOR AND ALL LOCAL AND
STATE REGULATIONS.
CONTRACTOR AGREES THAT HE SHALL ASSUME SOLE
AND COMPLETE RESPONSIBILITY FOR JOB SITE
CONDITIONS DURING THE COURSE OF CONSTRUCTION
OF THIS PROJECT.INCLUDING SAFETY OF ALL PERSONS
AND PROPERTY,THAT THIS REQUIREMENT SHALL APPLY
CONTINUOUSLY AND NOT BE LIMITED TO NORMAL
WORKING HOURS.AND THAT THE CONTRACTOR SHALL
DEFEND.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 /REQUIREMENTS THE
APPROPRIATE PARTIES I COMPANIES WITH CONFLICTING
DOCUMENTATION SHALL CONFER TO DETERMINE A
MUTUALLY AGREED UPON SOLUTION.
NOTES
A.
1.
w
GENERAL
A PASSIVE VAPOR MITIGATION SYSTEM (VMS)SHALL BE INSTALLED AND \NILL INCLUDE A 30 MIL DRY THICKNESS
APPLICATION OF SPRAY-APPLIED ASPHALTIC MATERIAL UNDERLAIN BY A LOW-PROFILE GAS VENT SYSTEM
VENTED AT THE ROOF.THE VMS IS DESIGNED TO BE CONVERTED TO AN ACTIVE SYSTEM IF NEEDED.
.VMS DETAILS PRESENTED IN THESE PLANS AND SPECIFICATIONS SHALL BE UTILIZED IN THE CONSTRUCTION OF
THE BUILDING DESIGNATED ON SHEETS VMS-1 THROUGH VMS-4.THE BASIS OF DESIGN IS A SPRAY—APPLIED
ASPHALTIC MEMBRANE MANUFACTURED BY ‘LIQUID BOOT®AND/OR 2GEO-SEALTM AND ASSOCIATED VENTING
MATERIALS AS DESCRIBED IN THESE PLANS.REFERENCE TO THESE PRODUCTS ARE PROVIDED TO DESCRIBE
THE SYSTEM AND MATERIALS ONLY AND MAY BE SUBSTITUTED FOR EQUIVALENT PRODUCTS IF APPROVED BY
THE VMS DESIGNER IN WRITING.NOTE:LIQUID BOOT 500 IS NOT AN APPROVED EQUIVALENT.
‘CETCO REMEDIATION TECHNOLOGIES.HOFFMAN ESTATES.IL [phone]
2 LAND SCIENCE TECHNOLOGIES.SAN CLEMENTE.CA [phone]
.THE VMS MEMBRANE WILL ALSO SERVE AS A MOISTURE MEMBRANE AND WILL REPLACE ANY VAPOR OR
MOISTURE BARRIER SPECIFIED IN THE STRUCTURAL DETAILS.INSTALLATION OF A MOISTURE OR VAPOR
BARRIER BETWEEN THE VMS MEMBRANE AND BUILDING FLOOR SLAB MAY VOID THE WARRANTY PROVIDED BY
THE VMS MEMBRANE MANUFACTURER.
SYSTEM COMPONENTS
.THE VMS CONSTRUCTION SHALL CONSIST OF.BUT NOT BE LIMITED TO.THE FOLLOWING:
.SUPPLY AND INSTALL A 4-INCH GRANULAR LAYER BENEATH FOUNDATION SLAB
.SUPPLY AND INSTALL LOW PROFILE VAPOR VENT MATERIAL AND ASSOCIATED FITTINGS
SUPPLY AND INSTALL 3—INCH PVC MANIFOLD PIPING
.SUPPLY AND INSTALL 30-MIL ASPHALTIC LAYER
.SUPPLY AND INSTALL BASE AND PROTECTIVE GEOTEXTILE LAYERS ABOVE AND BELOW THE ASPHALTIC
LAYER,RESPECTIVELY
PERFORM SMOKE AND COUPON TESTING OF THE VMS MEMBRANE
.SUPPLY AND INSTALL PVC VERTICAL VENT RISER PIPING.SAMPLE PORTS.AND GAS FITTINGS
.COMPLETE CONNECTION OF VERTICAL VENT RISER PIPING TO ROOF AS APPROPRIATE
INSTALL ROOF-MOUNTED TURBINE VENTILATORS
(p
a
p
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.ALL MATERIALS ARE TO BE DELIVERED TO THE PROJECT SITE IN THEIR ORIGINAL UNBROKEN PACKAGES
BEARING THE MANUFACTURER'S LABEL SHOWING BRAND.WEIGHT.VOLUME.BATCH NUMBER AND DATE.
MATERIALS ARE TO BE STORED AT THE PROJECT SITE IN STRICT COMPLIANCE WITH THE MANUFACTURER'S
INSTRUCTIONS
W
GAS VENT SYSTEM
GRANULAR LAYER
.A MINIMUM 4-INCH LAYER OF SAND OR GRAVEL GRANULAR SHALL BE PROVIDED BENEATH THE FOUNDATION
SLAB.THE GRANULAR LAYER SHALL BE A FINE TO MEDIUM GRANULAR AND CONTAIN NO MORE
THAN 5%FINES (LE.55%PASSING #200 SIEVE).THE GRADATION OF THE GRANULAR PLACED BELOW THE
MEMBRANE SHALL MEET THE FOLLOWING SPECIFICATIONS OR AS SPECIFIED IN THE GEOTECHNICAL REPORT IF
APPROVED BY THE VMS DESIGNER:
SAND GRAVEL
Sieve Percent Passing Sieve Percent Passmg
3/4"GRAVEL 3/8"GRAVEL3/8 Inch 100 14/2"100 _No.4 90-100 1..954 00 _
N°-8 7590 3/4"90.100 100N°~‘5 5575 3/8"20—55 70-95“0-3°3050 No.4 0-10 0-25$015600 12°12:No.8 as 0-10
0'‘.No.200 0-5 ASTM C 131 Test Gradmg B C
.THE GRANULAR WILL BE PLACED 2 INCHES ABOVE AND 1 INCH BELOW THE VAPOR VENT MATERIAL AS SHOWN IN
DETAILS 1 81 2.SHEET VMS-3.
.ANY GRANULAR REMOVED DURING PLACEMENT OF UTILITIES MUST BE PLACED BACK TO LEVEL GRADE AND
COMPACTED AS SPECIFIED IN THE GEOTECHNICAL ENGINEERS PROJECT PLANS AND SPECIFICATIONS.UTILITIES
PLACED IN THE GRANULAR LAYER MAY NOT BE LARGER THAN 1-INCH IN DIAMETER.UTILITIES LARGER THAN
1-INCH IN DIAMETER MUST BE BURIED INTO THE SUBGRADE SUCH THAT NO MORE THAN 1 INCH OF THE
GRANULAR LAYER IS AFFECTED.
.THE SUBGRADE UNDER THE GRANULAR SHALL BE ROLLED SMOOTH AND MOISTURE CONDITIONED AS
NECESSARY TO ACHIEVE THE COMPACTION SPECIFIED IN THE GEOTECHNICAL ENGINEER'S SPECIFICATION.
A.2 SUB-SLAB VAPOR VENT MATERIAL
1.SUB-SLAB LOW PROFILE VAPOR VENT PIPING SHALL BE COMPRISED OF 12-INCH INIDE BY 1-INCH THICK VAPOR
VENT MATERIAL VIRAPPED IN GEOTEXTILE OR EQUIVALENT AS APPROVED BY THE VMS DESIGNER.VENT PIPING
BY CETCO (LIQUID BOOT)OR LAND SCIENCE (GEO-SEAL)MEETS DESIGN REQUIREMENTS.
.VAPOR VENT MATERIAL SHALL BE INSTALLED AT LOCATIONS SHOWN ON SHEET VMS-2 AND PLACED WITHIN THE
4~INCH GRANULAR LAYER.LOW PROFILE VAPOR VENT MATERIAL SHALL BE PLACED SUCH THAT NO AREA
BEN EATH THE SLAB/FOUNDATION IS MORE THAN 25 FEET FROM THE VAPOR VENT MATERIAL.
.VAPOR VENT MATERIAL SHALL BE CONNECTED TO A VAPOR VENT TO 3-INCH PIPE ADAPTOR.3-INCH PVC PIPE
SHALL CONNECT THE ADAPTOR TO A 3—INCH PVC ELBOW TURNING UP THROUGH THE FLOOR SLAB ADJACENT TO
FOUNDATION FOOTINGS AND STRUCTURAL COLUMNS.THIS PIPING SHALL BE IN PLACE PRIOR TO POURING THE
FOUNDATION GRADE BEAMS OR FOOTINGS WHEN POURED SEPARATELY FROM THE FLOOR SLAB.THIS PIPING
SHALL BE ACCOMPLISH ED IN COMPLIANCE WITH ALL APPLICABLE BUILDING CODES AND WITH THE APPROVAL OF
THE PROJECT STRUCTURAL ENGINEER AND/OR BUILDING OFFICIAL
.3—INCH PVC TRANSITION PIPING SHALL BE PROVIDED ACROSS INTERIOR GRADE BEAMS THROUGH A 6-INCH PVC
SLEEVE TO CONNECT SUB~SLAB SECTIONS AS SHOWN IN DETAIL 8.SHEET VMS-3.THIS PIPING SHALL BE IN
PLACE PRIOR TO POURING THE FOUNDATION GRADE BEAMS OR FOOTING WHEN POURED SEPARATELY FROM
THE FLOOR SLAB.THIS PIPING SHALL BE ACCOMPLISHED IN COMPLIANCE WITH ALL APPLICABLE BUILDING
CODES AND WITH THE APPROVAL OF THE STRUCTURAL ENGINEER AND/OR BUILDING OFFICIAL.
A3 ABOVE SLAB GAS VENT RISER
A4
.THE VAPOR VENT RISER TO THE ROOF SHALL BE COMPRISED OF 3-INCH DIAMETER PVC (SEE DETAIL 6.SHEET
VMS-4.RISER PIPING SHALL BE LOCATED WITHIN THE WALLS/CHASES OR INSTALLED ADJACENT TO INTERIOR
SUPPORT COLUMNS.
.THE RISER PIPE TO THE ROOF SHALL BE FULLY SUPPORTED THROUGH THE ENTIRE HEIGHT OF THE BUILDING
WITH PIPE CLAMPS OR SIMILAR.SUCH THAT NO DOWNWARD FORCE (DUE TO THE WEIGHT OF THE RISER PIPE)IS
EXERTED ON THE SUBSLAB VENTING SYSTEM.
.A RISER PIPING SAMPLE PORT SHALL BE INSTALLED AS SHOWN ON DETAIL 3.SHEET VMS-4.ON THE PVC RISER
TO BE ACCESSED ON THE ROOF.
.THE RISER PIPE SHALL BE EQUIPPED WITH A 3-INCH GATE VALVE TO ALLOW FOR SH UTOFF OF AIR FLOW ABOVE
THE VALVE DURING SAMPLING OR OPERATION OF AN ACTIVE SYSTEM.A 3X3X1-1/2-INCH REDUCING TEE SHALL
BE INSTALLED BELOW THE VALVE AND EQUIPPED WITH A 1-1/2 INCH GAS-TIGHT REMOVABLE MALE THREADED
PLUG (SEE DETAIL 3.SHEET VMS-4).
.PLACARDS SHALL BE INSTALLED ON EACH VENT RISER APPROXIMATELY EVERY 5 FEET AND AT ANY EXPOSED
RISER PIPING (SEE DETAIL 5.SHEET VMS-4).
.A VMS MEMBRANE IDENTIFICATION SIGN SHALL BE INSTALLED IN UTILITY AND MECHANICAL ROOMS (SEE DETAIL
4.SHEET VMS—4).THIS SIGN IS TO BE PLACED ON THE WALLS AT EYE LEVEL AND SHALL NOT BE COVERED OVER.
THE LOCATION OF THIS NOTIFICATION WILL BE DETERMINED BY THE CONTRACTOR.OWNER.OR BUILDING
OFFICIAL.
PASSIVE TURBINE VENTILATOR
.A PASSIVE TURBINE VENTILATOR CAPABLE OF 26 CFM WITH A 4 MPH WIND SHALL BE INSTALLED ON AT THE TOP
OF EACH VENT RISER PIPE ABOVE THE ROOF LINE.THE VENTILATORS SHALL INCLUDE BASES.REDUCING
COUPLINGS.AND ALL OTHER REQUIRED ACCESSORIES FOR A SECURE CONNECTION TO THE VENT RISER PIPING.
.THE AU RA AV-3 ROOF VENT IS AN ACCEPTABLE PASSIVE TURBINE VENTILATOR (SEE DETAIL 1 &2.SHEET VMS-4).
THIS TURBINE IS MANUFACTURED BY ACTIVE
WWWROOFVENTSCOM.
VENTILATION PRODUCTS.INC;1-800—247-3483:
.THE PASSIVE TURBINE VENTILATORS SHALL BE INSTALLED IN ACCORDANCE WITH INDUSTRY STANDARDS AS
A.5
B
RECOMMENDED BY THE MANUFACTURER.
.RISER PIPES SHALL TERMINATE A MINIMUM OF 24 INCHES ABOVE THE ROOF-LINE.EQUIPPED WITH A
ROOF—MOU NTED TURBINE VENTILATOR AND BRACED APPROPRIATELY.(SEE DETAIL1 .SHEET VMS-4).
.ROOF-MOUNTED TURBINE VENTILATORS SHALL BE LOCATED AT A DISTANCE OF NOT LESS THAN 10 FEET FROM
ANY BUILDING AIR INTAKE AND AT A DISTANCE OF AT LEAST 4 FEET FROM ANY PROPERTY LINE.
.THE ROOD-MOUNTED TURBINE VENTILATORS SHALL NOT BE PLACED IN A WIND SHADOW AND SHALL EXTEND A
MINIMUM OF 1 FOOT ABOVE TOPS OF PARAPETS (IF APPLICABLE).
PERIMETER INLET VENTS
.IF SPECIFIED.PERIMETER INLET VENTS SHALL BE INSTALLED AT LOCATIONS SHOWN ON SHEET VMS-2.THE
VENTS SHALL CONSIST OF 2-INCH SCH 80 PVC PIPING INSTALLED FROM THE GRANULAR LAYER TRANSITIONING
THROUGH THE FOUNDATION WALLS TO AN EXTERIOR SLOTTED VENT PIPE INSTALLED TO THE EXTERIOR WALL A
MINIMUM OF 1-FOOT ABOVE SURFACE GRADE.PERIMETER INLET VENT PIPING SHALL BE INSTALLED IN-PLACE
PRIOR TO CONSTRUCTION OF THE FOUNDATION WALLS.
.IF SPECIFIED.THE TYPE OF THE EXTERIOR VENT PLATE WILL BE SELECTED BY THE ARCHITECT AND APPROVED
BY THE VMS DESIGNER.
VMS MEMBRANE
B.1 MATERIALS
1.THE VMS ASPHALTIC LAYER SHALL CONSIST OF A SPRAYED-ON OR LOCALLY TROWEL APPLIED.ASPHALTIC
EMULSION LAYER BETWEEN TVID LAYERS OF PROTECTIVE GEOTEXTILE MATERIAL.(I.E.A BASE LAYER AND A
PROTECTIVE LAYER).
.INSTALLATION OF THE BASE LAYER AND PROTECTIVE FABRIC SHALL BE INSTALLED IN ACCORDANCE \NITH THE
MANUFACTURER'S SPECIFICATIONS UNLESS OTHERWISE SPECIFIED AND APPROVED IN WRITING BY THE VMS
DESIGNER.
B.2 BASE AND PROTECTIVE LAYERS
1.
.SEAMS SHALL BE OVERLAPPED A MINIMUM OF 6
THE BASE LAYER SHALL CONSIST OF A CHEMICALLY RESISTANT POLYPROPYLENE GEOTEXTILE MATERIAL
SUPPLIED BY THE MANUFACTURER AND APPROVED BY THE VMS DESIGNER.THE BASE LAYER IS INSTALLED AS A
CARRIER FABRIC FOR THE ASPHALTIC LAYER.
.THE UPPER SURFACE OF THE VMS ASPHALTIC LAYER SHALL BE PROTECTED BY A PROTECTIVE LAYER.PLACED
BETWEEN THE FLOOR SLAB AND THE VMS LAYER AS SPECIFIED ON THESE PLANS.THE PROTECTIVE LAYER IS
INSTALLED AFTER THE APPLICATION.CURING.AND TESTING OF THE ASPHALTIC LAYER.
INCHES AND SEALED
SPECIFICATIONS SET FORTH IN THESE PLANS (SEE DETAIL 3.SHEET VMS-3).
IN ACCORDANCE WITH THE
8.3 SPRAY-APPLIED ASPHALTIC LAYER
1 .THE ASPHALTIC LAYER SHALL CONSIST OF A SPRAY-APPLIED.SINGLE COURSE.HIGH BUILD.POLYMER MODIFIED
ASPHALT EMULSION OR EQUIVALENT AS APPROVED BY THE VMS DESIGNER.THE MEMBRANE SHALL HAVE A
MINIMUM CURED (DRY)THICKNESS OF 30 MILS AND SHALL BE INSTALLED IN ACCORDANCE \NITH THE
MANUFACTURER'S SPECIFICATIONS UNLESS OTHERWISE SPECIFIED AND APPROVED BY THE VMS DESIGNER.
.THE VMS ASPHALTIC LAYER SHALL BE PLACED BENEATH THE FLOOR SLAB.FOOTINGS.AND TRENCHES IN
ACCORDANCE \NITH THESE PLANS AND DETAILS.THE VMS ASPHALTIC LAYER SHALL NOT BE PLACED ON TOP OF
ANY CONCRETE PIERS OR EXTENDED REBAR.
B.4 PENETRATION SEALS
1.
.MANUFACTURER MAY REQUIRE SUBMITTAL 0F DESIGN DOCUMENTS.
WHERE UTILITIES.VENT LINES.PIPING.ELECTRICAL CONDUITS.ETC.PENETRATE THE VMS MEMBRANE.A COLLAR
OF REINFORCEMENT FABRIC AND ASPHALTIC MATERIAL EXTENDING 6 INCHES BEYOND AND 3 INCHES UP ON TO
THE PENETRATION SHALL BE PROVIDED TO CREATE A GAS-TIGHT SEAL AROUND THE PENETRATION IN
ACCORDANCE \NITH THE MANUFACTURERS SPECIFICATIONS AS SHOWN ON DETAIL 4.SHEET VMSS.
.WHERE PENETRATIONS SUCH AS ELECTRICAL UTILITY CONDUITS.PLUMBING PIPING.ETC.ARE CONCENTRATED.
A CONCRETE PENETRATION BANK WILL BE CONSTRUCTED TO SECURE THE PENETRATIONS IN-PLACE (SEE
DETAIL 5.SHEET VMS-3).THE PENETRATION BANK SHALL BE CONSTRUCTED USING A MINIMUM THICKNESS OF 12
INCHES EXTENDING A MINIMUM OF 8 INCHES FROM ANY PENETRATION.ALLOWING FOR A MINIMUM 6.INCH
ATTACHMENT OF THE VMS MEMBRANE.SIMILAR TO AN ATTACHMENT TO AN INTERIOR FOOTING.THE TOP OF
CONCRETE PENETRATION BANK SHALL BE APPROXIMATELY 6 INCHES BELOW THE BOTTOM OF THE SLAB.
PENETRATIONS SHALL NOT BE IN CONTACT WITH ADJACENT PENETRATIONS OR OTHER OBJECTS TO ALLOW
PROPER SEALING AROUND EACH PENETRATIONS.
QUALITY ASSURANCE
.THE VMS SUBCONTRACTOR SHALL BE TRAINED AND APPROVED BY THE VMS MATERIAL MANUFACTURER.THE
VMS SUBCONTRACTOR SHALL PROVIDE THE VMS DESIGNER WITH A LETTER FROM THE MANUFACTURER:(A)
CONFIRMING THAT THE VMS SUBCONTRACTOR WAS RETAINED BY THE OWN ER FOR THE PERFORMANCE OF THIS
SCOPE OF WORK AND IS CERTIFIED BY THE MANUFACTURER FOR INSTALIATION OF THE MATERIAL;AND (B)
WARRANTING THAT ITS VKDRKMANSHIP IS FREE OF DEFECTS WHEN THAT MATERIAL IS INSTALLED BY THE VMS
SUBCONTRACTOR.
.A PRE-INSTALLATION CONFERENCE SHALL BE HELD PRIOR TO THE APPLICATION OF THE VMS MEMBRANE TO
VERIFY PROPER SUBSTRATE AND INSTALLATION CONDITIONS AND PROCEDURES.THE VMS SU BCONTRACTOR.
THE SITE SUPERINTENDENT.AND THE VMS DESIGNER SHALL BE PRESENT AT THIS MEETING.
.THE INSTALLATION OF THE VMS MEMBRANE SHALL BE CLOSELY MONITORED BY THE VMS DESIGNER OR HIS
DESIGNATED REPRESENTATIVE.INSPECTIONS SHALL TYPICALLY BE PERFORMED PRIOR TO.DURING.AND
SUBSEQUENT TO THE INSTALLATION OF THE VAPOR VENT MATERIAL AND APPLICATION OF THE VMS MEMBRANE.
IT IS THE RESPONSIBILITY OF THE VMS SUBCONTRACTOR TO NOTIFY THE SITE SUPERINTENDENT AND VMS
DESIGNER \NITHIN 72 HOURS OF BEGINNING ANY PORTION OF THIS WORK.
.ALL SURFACES WHERE THE VMS MEMBRANE TERMINATES SHALL BE INSPECTED AND APPROVED BY THE VMS
SUBCONTRACTOR FOR THE PERFORMANCE OF THIS SCOPE OF WORK AND BY THE VMS DESIGNER PRIOR TO
COMMENCING WORK.
.PRIOR TO PLACING THE FLOOR SLAB OVER THE VMS MEMBRANE.THE VMS DESIGNER SHALL INSPECT AND
APPROVE THAT THE VMS MEMBRANE WAS INSTALLED IN ACCORDANCE WITH TH ESE PLANS AND SPECIFICATIONS.
CONSTRUCTION OF THE FLOOR SLAB SHALL NOT PROCEED WITHOUT WRITTEN CERTIFICATION OF SUCCESSFUL
INSTALLATION BY THE VMS SUBCONTRACTOR.
SUBMITTALS
.THE VMS SUBCONTRACTOR SHALL SUBMIT ANY UPDATES OR REVISIONS TO THE MANUFACTURER'S MATERIAL
DATA AND RECOMMENDED INSTALLATION PROCEDURES TO THE VMS DESIGNER FOR REVIEW AND APPROVAL AT
LEAST ONE WEEK PRIOR TO THE CONSTRUCTION OF THE VMS MEMBRANE.
.THE VMS SUBCONTRACTOR SHALL SUBMIT REPRESENTATIVE SAMPLES OF THE FOLLOWING MATERIALS TO THE
VMS DESIGNER FOR APPROVAL:
BASE BOND AND UPPER PROTECTIVE LAYER MATERIALS
VMS ASPHALTIC MATERIAL
GRANULAR MATERIAL
LOW PROFILE VENT PIPING
.AT THE COMPLETION OF INSTALLATION.THE VMS SUBCONTRACTOR SHALL SUBMIT A LETTER TO THE VMS
DESIGNER AND TO THE OWNER CERTIFYING THAT VMS INSTALLATION WAS COMPLETED IN ACCORDANCE WITH
THE PROJECT PLANS AND SPECIFICATIONS AS WELL AS MANUFACTURER SPECIFICATIONS.
WAR RANTY
TERRACON RECOMMENDS THAT THE OWNER OBTAIN A WARRANTY FOR THE VMS MEMBRANE.THE
MANUFACTURER PROVIDES PRODUCT AND/OR SYSTEM WARRANTIES FOR THE VMS MEMBRANE RANGING FROM
ONE YEAR TO 30 YEARS IN DURATION.
ENVIRONMENTAL REPORTS.
GEOTECHNICAL REPORTS.OR OTHER DOCUMENTATION FOR REVIEW PRIOR TO ISSUING A WARRANTY.AND
ADDITIONAL COSTS MAY APPLY.PLEASE CONTACT THE SELECTED MANUFACTURER FOR WARRANTY TERMS AND
CONDITIONS AND ADDITIONAL INFORMATION.
.EXTENDED MANUFACTURER'S WARRANTIES MUST BE REQUESTED BY THE OWNER PRIOR TO VMS INSTALLATION
BID REQUESTS.
hu .
.THE VMS MEMBRANE SHALL BE INSTALLED BEFORE PLACEMENT OF REINFORCING STEEL.
JOB C.)NDET'OI~I€
.THE AREAS ADJACENT TO THE VMS MEMBRANE ARE TO BE PROTECTED BY THE VMS SUBCONTRACTOR FOR THE
PERFORMANCE OF THIS SCOPE OF WORK DURING THE INSTALLATION PROCESS.WHERE NECESSARY.MASKING
OR OTHER PROTECTIVE MEASURES SHALL BE UTILIZED TO PREVENT STAINING OF SURFACES BEYOND THE
LIMITS OF THE APPLICATION.
.WORK IS TO BE PERFORMED ONLY WHEN EXISTING AND FORECASTED WEATHER CONDITIONS ARE WITHIN THE
MANUFACTURER RECOMMENDATIONS FOR THE MATERIAL AND PRODUCT USED.THE APPLICATION OF THE VMS
MEMBRANE COMPOUNDS SHALL BE SUSPENDED IF THE AMBIENT TEMPERATURE FALLS BELOW 45°F.OR DURING
PERIODS OF PRECIPITATION.APPLICATION OF THE VMS MEMBRANE MAY BE PERFORMED BELOW 45°F.BUT
ONLY WITH WRITTEN PERMISSION FROM THE VMS DESIGNER AND MATERIAL MANUFACTURER.
.A MINIMUM CLEARANCE OF 24 INCHES IS REQUIRED FOR A TYPICAL SPRAY APPLICATION OF THE ASPHALTIC
LAYER.FOR AREAS WITH LESS THAN 24-INCH CLEARANCE.THE ASPHALTIC LAYER MAY BE APPLIED BY HAND.
.ALL PLUMBING.ELECTRICAL.MECHANICAL AND STRUCTURAL ITEMS THAT ARE LOCATED BENEATH OR THAT PASS
THROUGH THE VMS MEMBRANE SHALL BE POSITIVELY SECURED IN THEIR PROPER POSITIONS AND
APPROPRIATELY PROTECTED PRIOR TO APPLICATION OF THE ASPHALTIC LAYER.
IF REINFORCING
STEEL IS PRESENT AT THE TIME OF APPLICATION.ALL EXPOSED REINFORCEMENT SHALL BE MASKED BY THE
FOUNDATION SUBCONTRACTOR PRIOR TO APPLICATION OF THE ASPHALTIC LAYER.
.REINFORCING STEEL.PIPING.FORMS.ETC.SHALL NOT BEAR DIRECTLY ON THE MEMBRANE OR PROTECTIVE
LAYER AND EQUIPMENT SHALL NOT BE DRIVEN OVER THE MEMBRANE OR ITS PROTECTIVE LAYER WITHOUT
PRIOR APPROVAL FROM THE VMS DESIGNER AND MANUFACTURER.
.STAKES USED TO SECURE THE CONCRETE FORMS SHALL NOT PENETRATE THE VMS MEMBRANE AFTER IT HAS
BEEN INSTALLED.IF STAKES NEED TO PUNCTURE THE MEMBRANE AFTER IT HAS BEEN INSTALLED.THE VMS
DESIGNER AND INSTALLER SHOULD BE NOTIFIED.AND NECESSARY REPAIRS NEED TO BE MADE BY THE VMS
SUBCONTRACTOR.
.FIELD SITUATIONS NOT SPECIFICALLY DETAILED IN THIS VMS DESIGN SHALL BE HANDLED PER THE INTENT OF
THESE PLANS AND SPECIFICATIONS WITH THE APPROVAL OF THE VMS DESIGNER.THE APPLICATOR /
CONTRACTOR MAY SUBMIT SHOP DRAWINGS FOR ALTERNATIVE METHODS.SEE STRUCTURAL FOUNDATION
PLANS FOR COMPLETE DEPTHS AND DETAILS OF FOOTING.DEPTHS OF FOOTINGS SHOWN IN THESE PLANS ARE
GENERALIZED.ACTUAL FOOTING DEPTHS MAY VARY.
.APPROPRIATE CARE SHALL BE EXERCISED TO PROTECT THE VMS MEMBRANE AND PREVENT PENETRATIONS
SUBSEQUENT TO ITS APPLICATION.THE PROTECTIVE GEOTEXTILE SHALL BE KEPT FREE OF DIRT AND DEBRIS.
TO THE EXTENT POSSIBLE UNTIL THE FLOOR SLAB IS POURED.IT SHALL BE THE RESPONSIBILITY OF THE
GENERAL CONTRACTOR TO ENSURE THAT THE VMS MEMBRANE IS NOT PENETRATED AFTER THE COMPLETION
OF INSTALLATION ACTIVITIES.
INSTALLATION
G.1 VAPOR VENT MATERIAL INSTALLATION
1.VAPOR VENT MATERIAL SHALL BE CONNECTED TO PROVIDE A GAS-TIGHT SEAL AT ALL CONNECTIONS AND
FITTINGS AND SHALL BE CONSTRUCTED OF MATERIALS THAT COMPLY \NITH THE UNIFORM PLUMBING AND
MECHANICAL CODES.ALL JOINTS SHALL BE TIGHTLY SEALED \NITH APPROVED MATERIALS.ANY GLUE OR
SOLVENT USED TO SEAL THE PIPING MUST BE FREE OF VOLATILE ORGANIC VAPORS.
.PLACEMENT OF GRANULAR ABOVE THE PIPING SHALL NOT BEGIN BEFORE THE VMS DESIGNER HAS INSPECTED
THE GRADE AND ALIGNMENT OF THE PIPING.THE BEDDING OF THE PIPING AND THE JOINTS BETWEEN THE
PIPING.ALL PIPING LOCATED WITHIN THE GRANULAR LAYER SHALL BE PROTECTED FROM PHYSICAL DAMAGE.
.HORIZONTAL PVC PIPING GREATER THAN 10 FEET IN LENGTH SHALL HAVE 1/4-INCH DIAMETER WEEP HOLES
DRILLED ON THE BOTTOM OF THE PIPE APPROXIMATELY EVERY 5 FEET AND BE FABRIC WRAPPED.
.VENT RISER PIPE SHALL BE LOCATED WITHIN THE WALLS/CHASES OR SHALL BE SIMILARLY PROTECTED FROM
PHYSICAL DAMAGE.DAMAGE INCURRED DURING CONSTRUCTION OR OCCUPANCY COULD AFFECT SYSTEM
PERFORMANCE.
G.2 VMS MEMBRANE AND PROTECTIVE LAYER INSTALLATIONS
G.3
.ALL VMS MEMBRANE PENETRATIONS SHALL BE PREPARED
.THE SUBGRADE SHALL BE MOISTURE CONDITIONED AND COMPACTED BY THE GRADING CONTRACTOR AS
SPECIFIED IN THE PROJECT PLANS AND SPECIFICATIONS.FINISHED SURFACE SHALL BE SMOOTH.UNIFORM.
AND FREE OF DEBRIS AND STANDING WATER.FINAL SUBGRADE INSPECTION/PREPARATION SHALL NOT
PRECEDE THE VMS INSTALLATION BY MORE THAN 72 HOURS.
.THE GRANULAR LAYER SHALL BE MOISTURE CONDITIONED AND COMPACTED AS SPECIFIED IN THE PROJECT
PLANS AND SPECIFICATIONS.
.IF THE VMS MEMBRANE IS TO BE PLACED ON A CONCRETE SURFACE.CONCRETE SURFACES SHALL BE LIGHT
BROOM FINISHED OR SMOOTHED.FREE OF ANY DIRT.DEBRIS.LOOSE MATERIAL.RELEASE AGENTS OR CURING
COMPOUNDS.ALL VOIDS MORE THAN 1/4-INCH IN WIDTH SHALL BE PROPERLY FILLED WITH NON—SHRINK GROUT
OR AS SPECIFIED IN THE PROJECT PLANS AND SPECIFICATIONS.MASONRY JOINTS SHALL BE STRUCK SMOOTH
WITH A METAL TROWEL.ALL PENETRATIONS SHALL BE PREPARED IN ACCORDANCE WITH THE MANUFACTURERS
SPECIFICATIONS.
IN ACCORDANCE WITH MANUFACTURER'S
SPECIFICATIONS.WHERE POSSIBLE.ANY RE-BAR THAT PENETRATES THE VMS MEMBRANE SHALL BE BENT OVER
AND LEFT IN THE SLAB.
.TRENCH ES SHALL BE CUT OVE RSIZE AS NECESSARY TO ACCOMMODATE INSTALLATION OF THE VMS MEMBRANE.
.THE WALLS OF FOOTING OR UTILITY TRENCHES SHALL BE SMOOTH AND FREE OF ROOTS OR PROTRUDING
ROCKS.
.IF ORGANIC MATERIALS \NITH POTENTIAL FOR GROWTH (E.G.SEEDS OR GRASSES)ARE PRESENT \NITHIN THE
SUBGRADE.THE GENERAL CONTRACTOR SHALL APPLY A SOIL STERILANT AT THE MANUFACTURER'S
RECOMMENDED RATE PRIOR TO THE INSTALLATION OF THE VMS MEMBRANE.
.THE BASE LAYER SHALL FIRST BE LAID ON THE GRANULAR LAYER IN ACCORDANCE WITH THE MATERIAL
MANUFACTURER'S SPECIFICATIONS.ALL SEAMS SHALL BE OVERLAPPED A MINIMUM OF 6 INCHES.ANY OPEN
UTILITY OR OTHER TRENCH PRESENT AT THE TIME OF APPLICATION SHALL BE LINED WITH BASE LAYER
EXTENDING AT LEAST 6 INCHES ONTO THE ADJOINING SUBGRADE.THE BASE LAYER SHALL BE IN INTEGRAL
CONTACT WITH ALL INTERIOR FOUNDATION CORNERS.THE ASPHALTIC LAYER SHALL BE SPRAY APPLIED AT ALL
OVERLAPPED SEAMS TO A THICKNESS OF 30 MILS MINIMUM.
.THE PROTECTIVE LAYER SHALL BE INSTALLED OVER THE NOMINALLY CURED ASPHALTIC LAYER NO LATER THAN
RECOMMENDED BY 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.
SEALING PENETRATIONS
.ALL PENETRATIONS SHALL BE CLEANED AND PREPARED TO PROVIDE PROPER ADHESION OF THE ASPHALTIC
LAYER FOR A VAPOR TIGHT SEAL.METAL PENETRATIONS SHALL BE SANDED CLEAN AND PREPARED USING
EMERY CLOTH FOR PROPER ADHESION OF THE ASPHALTIC LAYER.
.ALL PENETRATIONS SHOULD BE SECURED PRIOR TO INSTALLATION OF THE VMS MEMBRANE SYSTEM.
PENETRATIONS SHALL NOT BE IN CONTACT WITH ADJACENT PENETRATIONS OR OTHER OBJECTS TO ALLOW
PROPER SEALING AROUND THE ENTIRE PENETRATION CIRCUMFERENCE.WHERE PENETRATIONS SUCH AS
ELECTRICAL CONDUITS.PLUMBING PIPING.ETC ARE CONCENTRATED.A CONCRETE PENETRATION BANK SHALL
BE CONSTRUCTED PRIOR TO VMS MEMBRANE PLACEMENT.THE CONCRETE PENETRATION BANK WILL CONSIST
OF A MINIMUM THICKNESS OF 12 INCHES OF CONCRETE.EXTENDING A MINIMUM OF 8 INCHES BEYOND THE EDGE
OF EACH PENETRATION TO ALLOW FOR ATTACHMENT OF THE VMS MEMBRANE (SEE DETAIL 5.SHEET VMS-3).
.THE BASE LAYER SHALL BE CUT AROUND PENETRATIONS SO THAT IT LAYS FLAT ON THE GRANULAR MATERIAL.
THERE SHOULD NOT BE A GAP LARGER THAN 1/8-INCH BETWEEN THE BASE LAYER AND THE PENETRATION (SEE
DETAIL 4.SHEET VMS-3).
.ONE COAT OF TROWEL GRADE ASPHALTIC MATERIAL OR ASPHALTIC SPRAY MATERIAL SHOULD BE APPLIED TO
THE BASE GEOTEXTILE LAYER AND AROUND THE PENETRATIONS AT A THICKNESS OF 30 MILS.PENETRATIONS
SHOULD BE TREATED IN A SINCH RADIUS AROUND THE PENETRATION AND 3 INCHES ONTO THE PENETRATION
OBJECT.
.BASE GEOTEXTILE MATERIAL.PROTECTIVE GEOTEXTILE MATERIAL.OR REINFORCEMENT FABRIC SHALL BE USED
AS AN EMBEDDED COLLAR PLACED AFTER THE FIRST APPLICATION OF THE ASPHALTIC SPRAY OR ASPHALTIC
TROWEL GRADE MATERIAL.THEN SPRAY A SECOND 30 MIL COAT OVER THE EMBEDDED REINFORCING LAYER
ENSURING THE COMPLETE SATURATION OF THE EMBEDDED LAYER AND TIGHT SEAL AROUND THE PENETRATION.
.THE PENETRATION SHALL BE WRAPPED WITH A POLYPROPYLENE CABLE TIE AT A POINT 2 INCHES ABOVE THE
BASE OF THE PENETRATION.THE CABLE TIE SHALL BE TIGHTENED FIRMLY SO AS TO SQUEEZE THE CURED
MEMBRANE COLLAR.BUT NOT TOO TIGHT TO SLICE INTO THE FINISHED SEAL.(SEE DETAIL 4.SHEET VMS-3).THE
CABLE TIE MAY BE INSTALLED IMMEDIATELY AFTER THE EMBEDDED COLLAR HAS BEEN INSTALLED.
H 'NSPECTICI‘S
1.THE INSPECTION OF ALL VAPOR CONTROL MEASURES SHALL BE PERFORMED BY THE VMS DESIGNER (OR HIS
DESIGNATED AGENT).AT A MINIMUM.INSPECTION SHALL TAKE PLACE AT THE FOLLOWING STAGES OF THE
INSTALLATION.AS DEEMED NECESSARY BY THE VMS DESIGNER:
AFTER THE INSTALLATION OF THE LOW PROFILE VENT PIPING AND PRIOR TO INSTALLATION OF THE
GRANULAR LAYER ABOVE THE VENT PIPING;
PERIODICALLY DURING THE INSTALLATION OF THE BASE LAYER;
DURING THE SPRAY APPLICATION OF THE ASPHALTIC LAYER:
DURING SMOKE TESTING;
AFTER THE INSTALLATION OF THE PROTECTIVE LAYER.REINFORCING STEEL.AND ALL FOUNDATION FORM
VIDRK.BUT PRIOR TO AND AT THE FIRST HOUR OF THE PLACEMENT OF CONCRETE FOR THE FLOOR SLAB;
DURING AND AT THE COMPLETION OF THE VERTICAL VENT RISER PIPING AND ROOF VENT INSTALLATION.
2.FINAL SUBGRADE INSPECTION I PREPARATION SHALL NOT PRECEDE THE VMS INSTALLATION BY MORE THAN 72
HOURS.
3.FIELD QUALITY CONTROL IS A VERY IMPORTANT PART OF ALL APPLICATIONS.THE VMS SUBCONTRACTOR SHALL
CHECK HIS OWN WORK FOR COVERAGE.THICKNESS.AND ALL-AROUND GOOD VVORKMANSHIP.
4.3—INCH BY 3—INCH SQUARE COUPON SAMPLES SHALL BE CUT FROM THE VMS MEMBRANE PRIOR TO THE
PLACEMENT OF THE PROTECTIVE LAYER FOR A MAXIMUM AREA OF 500 SQUARE FEET OF THE INSTALLED VMS
MEMBRANE.THE THICKNESS OF THE COUPON SAMPLE SHALL BE MEASURED WITH A DIGITAL CALIPER HAVING A
RESOLUTION OF 1 MIL OR BETTER.THE THICKNESS OF THE BASE GEOTEXTILE SHALL BE DEDUCTED FROM THE
COMPOSITE THICKNESS IN ORDER TO DETERMINE THE THICKNESS OF THE ASPHALTIC LAYER.THE COUPON
SAMPLE LOCATION SHALL BE MARKED BY THE VMS DESIGNER FOR RESPRAY.AFTER MEASURING THE
THICKNESS OF 5 SAMPLES IT IS AT THE DISCRETION OF THE INSPECTOR TO CONTINUE COLLECTING SAMPLES
EVERY 500 SQUARE FEET OR.TO REDUCE SAMPLING FREQUENCY TO EVERY 1.000 SQUARE FEET.
5.VOIDS LEFT BY SAMPLING SHALL BE PATCHED BY THE VMS SUBCONTRACTOR BY OVERLAPPING THE VOID BY A
MINIMUM OF 6 INCHES.A THIN TACK COAT OF ASPHALTIC EMULSION SHALL BE APPLIED TO ADHERE TO THE
GEOTEXTILE BASE PATCH.SPRAY OR TROWEL APPLIED ASPHALTIC EMULSION SHALL THEN BE APPLIED TO A 100
MIL MINIMUM DRY THICKNESS.EXTENDING AT LEAST 3 INCHES BEYOND THE GEOTEXTILE PATCH.
6.ON CONCRETE SURFACES.THE VMS MEMBRANE SHALL BE CHECKED FOR COVERAGE WITH A LIGHTLY OILED.
NEEDLE NOSE DEPTH GAUGE.THE MINIMUM READING SHALL BE RECORDED AND THE TEST AREA SHALL BE
MARKED FOR REPAIR BY THE VMS DESIGNER.
7.EACH AREA OF THE VMS MEMBRANE SHALL BE SMOKE TESTED IN ACCORDANCE WITH MANUFACTURER'S
PROTOCOL TO CONFIRM THE INTEGRITY OF THE VMS MEMBRANE.A SMOKE TEST SHALL BE CONDUCTED FOR A
MAXIMUM OF EVERY 2.500 SQUARE FOOT AREA.ANY LEAKS WHICH ARE IDENTIFIED SHALL BE REPAIRED AND
RE-TESTED UNTIL ALL LEAKS OR PERFORATIONS ARE ELIMINATED.
8.DURING THE SMOKE TEST.THE DISCHARGE NOZZLE FROM THE SMOKE-GENERATION DEVICE SHALL BE
INTRODUCED INTO EACH SMOKE-TEST OPENING AT THE BASE OF THE INTERSECTION OF CELLS AND THEN AIMED
SEQUENTIALLY IN ALL FOUR CARDINAL DIRECTIONS IN ORDER TO CHECK FOR PIN-HOLE LEAKS OR
PERFORATIONS IN THE DISCHARGE NOZZLE DIRECTION.SMOKE SHOULD BE VISIBLE AS IT EXISTS THE
PREVIOUSLY CUT COUPON SAMPLE OPENINGS AND SMOKE TESTING OPENINGS.
9.PRIOR TO PLACING THE CONCRETE SLAB OVER THE VMS MEMBRANE.THE VMS SUBCONTRACTOR SHALL
CERTIFY IN WRITING THAT THE VMS MEMBRANE HAS BEEN INSTALLED AND TESTED IN ACCORDANCE WITH THE
MANUFACTURER’S SPECIFICATIONS.IS FREE OF LEAKS.AND HAS A MINIMUM THICKNESS OF 30 MILS.
10.
11.SERVICES LISTED IN THIS SPECIFICATION AS BEING REQUIRED BY THE VMS DESIGNER ARE DEPENDENT UPON
OWNER'S AUTHORIZATION OF SAID SERVICES TO VMS DESIGNER.AND.NOTIFICATIONS TO THE VMS DESIGNER
OF THE PROJECT STATUS BY THE VMS SUBCONTRACTOR.IF THESE SERVICES ARE NOT PERFORMED BY THE
VMS DESIGNER.THE MANUFACTURER‘S WARRANTY MAY BE VOIDED.
RECOMMENDED VAPOR MITTGATTON SYSTEM TASK SUMMARY
TASKS TO BE COMPLETED
VMS SUB CONTRACTOR
PREPARATION
OF
ABOVE
ALLOW FOR
ATTACHMENT TO VERTICAL AND
12-I
TION BANKS WHERE UTILITY CONDUITS ARE
VATION OF
VAPOR VENT
NST
OF THE VAPOR VENT MATERIAL.
THE VAPOR
TERIAL AFTER THE INSTALLATION IS
NS
SS NTERIOR
INSTALLATION OF 3—INCH VERTICAL VENT RISER PIPING
A MINIMUM OF 24 INCHES ABOVE FINISHED
ROOF.
INSTALLATION OF PERIMETER INLET VENTS (IF
SPECIFIED)
SOI BUILDING PAD
SITE.IF NECESSARY.
OF BASE AND ASPHALTIC LAYERS
SEALING OF ALL PENETRATIONS
OF PROTE
NAL
OF
S S BY VMS
TECHNICIAN DURING INSTALLATION.
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 TER RACON DOES NOT WARRANT THE INORK OF THIRD PARTIES SUPPLYING INFORMATION
USED IN THE PREPARATION OF THE VAPOR MITIGATION SYSTEM.THESE SERVICES WERE PERFORMED IN
ACCORDANCE WITH THE SCOPE OF SERVICES AGREED WITH YOU.OUR CLIENT.AS REFLECTED IN OUR PROPOSAL.
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APPVD.BY:JSS/DMS
SCALE:AS SHOWNDATE:08/22/2018JOBNO.61177111
ACAD NO.61177111
SHEET NO.:1 OF 4
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SCALE:
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NOTES:
1.MEASUREMENTS MAY BE FIELD ADJUSTED PROVIDED ACCURATE
AS-BUILT DRAWINGS ARE PROVIDED TO THE VMS DESIGNER .
2.SEE STRUCTURAL FOUNDATION PLANS FOR COMPLETE DEPTHS AND
DETAILS OF FOOTINGS. THIS DRAWING IS NOT TO BE USED FOR
FOUNDATION LAYOUT. ENGINEER'S SEAL COVERS VMS DESIGN
ONLY. SEE STRUCTURAL PLANS FOR DETAILS.
3.GENERAL CONTRACTOR TO COORDINATE VENT RISERS AND SAMPLE
PORT LOCATIONS WITH OTHER TRADES TO AVOID CONFLICTS.
4.VMS MEMBRANE SHALL BE INSTALLED UNDER THE EXTENT OF ALL
OCCUPIED AREAS.
5.VMS MEMBRANE WILL NOT BE INSTALLED IN GARAGE. HOWEVER,
VENTS AND RISERS WILL BE PLACED IN THIS AREA.
LEGEND
LOW-PROFILE VAPOR VENT MATERIAL
3" PVC VERTICAL VENT RISER PIPER1
EXTENT OF VMS MEMBRANE
3" SCH 80 PVC PIPE
LOW PROFILE VAPOR VENT MATERIAL END CAP
TRANSITION PIPING AT GRADE BEAMS
R-1
R-2
R-3
R-4
R-5
R-6
R-7
R-8
R-9
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4.VMS MEMBRANE SHALL BE INSTALLED UNDER THE EXTENT OF ALL
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5.VMS MEMBRANE WILL NOT BE INSTALLED IN GARAGE. HOWEVER,
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DESIGNED BY:JSS/BKC
DRAWN BY:BKC
APPVD.BY:JSS/DMS
SCALE:AS SHOWN
DATE:08/22/2018
JOB NO.61177111
ACAD NO:61177111 I
SHEET No.2 4 OF 4

Appendix B
Coupon Sample and Smoke Test Injection Locations

Appendix C
VMS Observation Summary Table
(VMS Membrane Coupon & Smoke Test Results)

Murray Fire Station Vapor Mitigation System
Project No. 61177111
VMS Observation and Testing Summary Table
(VMS Membrane Coupon & Smoke Test Results)
Test Area Date Inspector
Coupon Sample
(Base + Core)
Thickness (mils)
Smoke Test
Acceptable
1 4/11/2019 ML 55 Y
2a 4/11/2019 ML 98 Y
2b 4/11/2019 ML 52 Y
3 4/11/2019 ML 49 Y
4 4/14/2019 NS 60 Y
5a 4/14/2019 NS 63 Y
5b 4/14/2019 NS 50 Y
6 4/14/2019 NS 60 Y
7 4/14/2019 NS 59 Y
8 4/14/2019 NS 50 Y
9 4/14/2019 NS 48 Y
10 4/14/2019 NS 48 Y
11 4/14/2019 NS 53 Y
12 4/14/2019 NS 50 Y
13 4/14/2019 NS 50 Y
14 4/14/2019 NS 50 Y
15 4/14/2019 NS 49 Y
16 4/14/2019 NS 44 Y
17 4/14/2019 NS 48 Y
18 4/14/2019 NS 45 Y
19 4/14/2019 NS 49 Y
20 4/14/2019 NS 60 Y
21 4/14/2019 NS 48 Y
22 4/14/2019 NS 44 Y

Appendix D
VMS Installation Photographic Log

Vapor Mitigation System Installation Observation
Murray Fire Station ■ Murray, Utah
Terracon Project No. 61177111
Responsive ■ Resourceful ■ Reliable 1
Photo 1 View N. Gravel Substrate prepared for
Horizontal VMS Venting at the east side of
Building (4-2019)
Photo 2 View W. Gravel Substrate prepared for
Horizontal VMS Venting at the east side of
Building (4-2019)
Photo 3 View N. Solid Vent lines in gravel substrate for
connections of Low Profile sub slab vent lines
to Riser at east side of Building (4-2019)
Photo 4 View W. Low profile venting installed in NE
building area pending burial in gravel
substrate. Connected to solid piping and Riser
in foreground.(4-2019)
Photo 5 View W. Low profile venting installed in SE
building area pending burial in gravel
substrate. (4-2019)
Photo 6 View ESE. Low profile venting installed in SE
building area pending burial in gravel
substrate. (4-2019)
Vapor Mitigation System Installation Observation
Murray Fire Station ■ Murray, Utah
Terracon Project No. 61177111
Responsive ■ Resourceful ■ Reliable 2
Photo 7 View E. at solid piping connecting low profile
venting segments to risers (4-2019)
Photo 8 View NW. West end of building. Low profile
venting being installed (4-2019)
Photo 9 View NW. West end of building. Low profile
venting installed in substrate (4-2019)
Photo 10 View S. Laying Geo-Seal® Base layer and
spraying Core in south central area of building
(4-2019)
Photo 11 View S. Installing Geo-Seal® Base layer in
background. Low profile vent line in
foreground prior to substrate & Base layer
installation (4-2019).
Photo 12 View W. Spray application of 30-mil thick Geo-
Seal® Core (asphaltic membrane) on Geo-
Seal® Base layer (4-2019)
Vapor Mitigation System Installation Observation
Murray Fire Station ■ Murray, Utah
Terracon Project No. 61177111
Responsive ■ Resourceful ■ Reliable 3
Photo 13 View NNE. Geo-Seal® Core sprayed on Base
layer in central eastern portion of VMS
(4-2019)
Photo 14 View SSW. Geo-Seal® Core sprayed on Base
layer at western end of VMS (4-2019)
Photo 15 View W. Geo-Seal® Core sprayed on Base
layer around elevator pit in central eastern
portion of VMS (4-2019)
Photo 16 View S. Geo-Seal® Core sprayed on Base
layer in central eastern portion of VMS
(4-2019)
Photo 17 View S. Laying and sealing Geo-Seal® Bond
Layer in central eastern portion of VMS area
(4-2019)
Photo 18 View S. Laying and sealing Geo-Seal® Bond
Layer at eastern end of VMS area (4-2019)
Vapor Mitigation System Installation Observation
Murray Fire Station ■ Murray, Utah
Terracon Project No. 61177111
Responsive ■ Resourceful ■ Reliable 4
Photo 19 View E. VMS Geo-Seal® Bond layer installed
at SE corner of VMS area (4-2019)
Photo 20 View N. VMS Geo-Seal® Bond layer installed
at eastern VMS area (4-2019)
Photo 21 View SSW. Geo-Seal® Bond layer installed at
west end of VMS area (4-2019)
Photo 22 Riser (R4) located in Engine Bay, showing
VMS Identification placard (3-20-2020).
Photo 23 Riser (R5) in Engine Bay showing VMS
Identification placard every 5 feet (3-20-
2020).
Photo 24 Rooftop vent (V1) with ventilator and sample
port (4-6-2020).
Vapor Mitigation System Installation Observation
Murray Fire Station ■ Murray, Utah
Terracon Project No. 61177111
Responsive ■ Resourceful ■ Reliable 5
Photo 25 Rooftop vent (V4) with ventilator and sample
port (4-6-2020).
Photo 26 Rooftop vent (V6) with ventilator and sample
port (4-6-2020).

Appendix E
VMS Membrane Installation Field Reports