HomeMy WebLinkAbout24025 Crayton Printing VIMS Post-Construction Monitoring Work Plan Rev 1 20211221i https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Akridge/AKR.005 Dunavant Brownfields Assessment/VIMP/Monitoring/VIMS Effectiveness Testing Work Plan - AKR.005.doc
Post-Construction VIMS Sampling Work Plan Revision 1 Crayton Printing
Distribution Street and Dunavant Street Charlotte, North Carolina Brownfields Project No. 24025-20-060 H&H Job No. AKR-005
Table of Contents
1.0 Introduction .............................................................................................................................1
2.0 Post-Construction Indoor Air and Sub-Slab Vapor Sampling ...........................................3
2.1 Indoor Air Sampling Methodology .......................................................................................4
2.2 Sub-Slab Vapor Sampling Methodology ...............................................................................5
2.3 Quality Assurance / Quality Control .....................................................................................6
2.4 Reporting ...............................................................................................................................7
2.5 Schedule .................................................................................................................................7
3.0 Future Tenants & Building Uses ...........................................................................................8
List of Tables
Table 1 Proposed Post-Construction VIMS Sample Summary Table
List of Figures
Figure 1 Site Location Map
Figure 2 Site Map
Figure 3 Proposed Quarterly and Annual Indoor Air and Sub-Slab Vapor Sample Location Map
– Level 1
Figure 4 Proposed Annual Indoor Air and Sub-Slab Vapor Sample Location Map – Level 2
i https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Akridge/AKR.005 Dunavant Brownfields Assessment/VIMP/Monitoring/VIMS Effectiveness Testing Work Plan - AKR.005.doc
List of Appendices
Appendix A Vapor Intrusion Mitigation System Design – Sheets VM-1, VM-2, VM-3, and
VM-3A
Appendix B Vapor Intrusion Assessment Data Summary
1
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge/akr.005 dunavant brownfields assessment/vimp/monitoring/vims effectiveness testing work plan - akr.005.doc
Post-Construction VIMS Sampling Work Plan Revision 1 Crayton Printing
Distribution Street and Dunavant Street Charlotte, North Carolina Brownfields Project No. 24025-20-060 H&H Job No. AKR-005
1.0 Introduction
On behalf of KA D&D Holdings LLC, Hart & Hickman, PC (H&H) has prepared this Post-
Construction Vapor Intrusion Mitigation System Sampling Work Plan (Work Plan) for the
proposed Hawkins Press apartments at the Crayton Printing Brownfields property located at
Distribution Street and Dunavant Street in Charlotte, Mecklenburg County, North Carolina
(Site). A Site location map is provided as Figure 1. The Site is comprised of a single parcel of
land (Mecklenburg County Parcel Identification No. 12104201) totaling approximately 2.85
acres. Site buildings have been razed and redevelopment is underway as of the submittal of this
post-construction indoor air sampling work plan. Key Site features are depicted on Figure 2.
Current redevelopment plans for the Site include constructing a seven-story multi-family
residential apartment building that wraps around a parking garage. Level 1 of the proposed
building will be completely on grade and will consist of apartment units and open-air parking,
leasing, office, amenity, mechanical, and building services areas. The enclosed space of the
Level 1 floor is approximately 25,000 sq ft. Due to the natural grade rise from northwest to
southeast, Level 2 is partially over the ground level floor (northwestern portion) and 32,000 sq ft
are on grade (southeastern portion). Level 2 and subsequently higher levels will consist of
residences and mechanical rooms. The proposed building layout is presented on Figure 2 and in
Appendix A.
To address potential vapor intrusion concerns for the proposed apartment building, H&H
prepared a Vapor Intrusion Mitigation Plan (VIMP) and revisions to the VIMP based on DEQ
comments. In an email dated August 24, 2021, the DEQ Brownfields Program provided
approval of the revised VIMP dated August 24, 2021. Pre-occupancy testing in included in the
approved VIMP. The post-construction/post-occupancy sampling plan was deferred and is being
2
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge/akr.005 dunavant brownfields assessment/vimp/monitoring/vims effectiveness testing work plan - akr.005.doc
addressed by this plan. The VIMP includes installation of a VIMS designed to minimize
potential vapor intrusion into the Site building using passive venting and a vapor barrier. The
VIMS design is depicted on Sheets VM-1, VM-2, and VM-2A in Appendix A.
The VIMS includes placement of a minimum 5-inch base course gravel layer consisting of high
permeability stone (clean #57 stone, or similar high permeability stone approved by the Engineer
certifying the VIMP) below the concrete slab of the building. A horizontal collection piping
network will be installed within the base course gravel layer prior to placement of a vapor barrier
directly beneath the slab. Passive sub-slab venting will be accomplished using wind-driven
turbine fans (a passive measure) and horizontal perforated collection piping which will collect
vapor from beneath the ground floor slabs and discharge the vapors above the building roofline
through vertical riser piping. As indicated in the DEQ approved VIMP, inspection of VIMS
components, post-installation influence testing, and VIMS effectiveness analytical sampling will
be conducted on each VIMS treatment to evaluate VIMS effectiveness prior to occupancy.
IH&H has prepared this Work Plan to outline the scope of work for indoor air and sub-slab vapor
sampling following apartment construction and occupancy. A sample summary table is provided
as Table 1, and a description of the post-construction sampling activities is outlined in the
following section.
3
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge/akr.005 dunavant brownfields assessment/vimp/monitoring/vims effectiveness testing work plan - akr.005.doc
2.0 Post-Construction Indoor Air and Sub-Slab Vapor Sampling
The proposed sampling activities will be performed in general accordance with the DEQ Inactive
Hazardous Sites Branch (IHSB) Guidelines for Assessment and Cleanup of Contaminated Sites
(Guidelines) dated January 2020, the DEQ DWM Vapor Intrusion Guidance (VI Guidance)
dated March 2018, and most recent versions of the U.S. Environmental Protection Agency (EPA)
Region IV Science and Ecosystem Support Division (SESD) Field Branches Quality System and
Technical Procedures guidance. This plan is based on the assumption that pre-occupancy testing
does not indicate the need for depressurization with active fans.
Following construction of the VIMS, VIMS effectiveness monitoring will be completed on a
quarterly for the first year and then an annual basis. The pre-occupancy sampling event
described in the previously approved VIMP will count as the first quarterly sampling event.
The quarterly sampling is being required by DEQ due to the presence of trichloroethene (TCE)
in prior subslab vapor samples under the Level 1 portion of the apartment building. In addition,
Level 2 of the apartment building is upgradient of the locations on Level 1 where TCE (and also
tetrachloroethene or PCE) were detected in subslab or soil gas samples. Therefore, the quarterly
sampling will focus on Level 1. The VOCs to be analyzed in the quarterly sampling will include
PCE, TCE, cis-1,2-dichloroethene (DCE), vinyl chloride, and other VOCs detected in pre-
occupancy subslab vapor samples. Six indoor air and six subslab samples are proposed as shown
in Table 1 and Figure 3. If TCE is detected in one of the Level 2 sub-slab samples during pre-
occupancy sampling, sub-slab monitoring points MP-15, MP-17, MP-18, MP-19 and MP-20, and
indoor air sampling locations IA-7 through IA-12 will be added to quarterly sampling. Revisions
to the Level 2 monitoring schedule may be requested in writing to DEQ in advance for review
and approval.
Annual testing will cover both Level 1 and Level 2 for analysis of VOCs. 12 indoor air samples
and 12 subslab vapor samples are proposed for the annual testing (See Table 1 and Figure 4).
The VOCs to be analyzed in the annual sampling will include PCE, TCE, DCE, vinyl chloride,
and other VOCs detected in pre-occupancy subslab vapor samples.
4
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge/akr.005 dunavant brownfields assessment/vimp/monitoring/vims effectiveness testing work plan - akr.005.doc
2.1 Indoor Air Sampling Methodology
The indoor air samples will be collected in accordance with the DWM VI Guidance. Each indoor
air sample will be collected using a laboratory supplied individually certified 6-liter Summa
canister over a 24-hour period. The indoor air samples will be collected using 6-liter stainless
steel Summa canisters connected to in-line flow controllers equipped with a vacuum gauge. The
flow controllers will be set by the laboratory to allow the samples to be collected over an
approximately 24-hour period. A 3-foot long sampling cane will be connected to the flow
controller so that the sample intake point is positioned approximately 5 ft above grade (typical
breathing zone height) when the sample canister is set on its base. Prior to and after the indoor
and background air samples are collected, vacuum in the canisters will be measured using a
laboratory-supplied vacuum gauge and recorded by sampling personnel. The starting vacuum
should be within 10% of the vacuum when the Summa canisters left the laboratory, or a
replacement canister will be used. A vacuum will be maintained within the canisters at the
conclusion of the sampling event. Vacuum within the sample canisters will not be allowed to
reach 0 inches of mercury, and sampling will be considered complete with sample canister
vacuum readings measured between 5 and 10 inches of mercury.
The starting and ending vacuum in each canister will be recorded on the sample chain-of-
custody. Periodic checks will be conducted by sampling personnel to monitor the pressure
within the Summa canisters during sampling to ensure adequate sample volume is collected. The
sample canisters will then be labeled and shipped under standard chain-of custody procedures to
a qualified laboratory for analysis of select volatile organic compounds (VOCs) by EPA Method
TO-15. The analytical laboratory will be instructed to report vacuum measurements at receipt
and J-flag concentrations for each sample. H&H will request that the laboratory report
compound concentrations to the lower of the laboratory method detection limits or the DEQ
DWM Residential Vapor Intrusion Indoor Air Screening Levels (IASLs) to the extent possible.
For QA/QC purposes, one duplicate and one background air sample will be collected from an
upwind location during each indoor air sampling event. In addition, an Indoor Air Building
Survey form (Appendix C of the DWM VI Guidance) will be completed for each sampling
5
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge/akr.005 dunavant brownfields assessment/vimp/monitoring/vims effectiveness testing work plan - akr.005.doc
event. If Site-specific compounds of concern are identified in indoor sources such as building
materials, sub-slab vapor concentrations will be compared to indoor air concentrations to
evaluate the likelihood that indoor air sources are contributing to VOC detections.
During each sampling event, indoor/outdoor air pressure differential will be measured for the
building near the start, middle, and end of the 24-hour sampling period using a manometer
sensitive to 0.001 inches of water. In addition, Site-specific weather conditions including
exterior wind speed, exterior wind direction, indoor/outdoor temperature, barometric pressure,
and precipitation (if any) will be recorded near the start, middle, and end of the sampling period.
2.2 Sub-Slab Vapor Sampling Methodology
H&H will collect sub-slab vapor samples within the Site building. Sub-slab vapor samples will
be collected from select monitoring points on Floor 1 concurrently with indoor air samples to
further evaluate the potential for structural vapor intrusion. The sub-slab vapor samples will be
collected from locations generally similar with indoor air samples listed in Section 2.1. Floor 1
The locations of the sub-slab vapor samples are shown in Figures and 4.
Prior to sample collection, leak tests will be performed at each sample location. A shroud will be
constructed around the monitoring point and sub-slab soil vapor sampling train and canister. The
air within the shroud will be flooded with helium gas and the concentrations will be measured
and maintained using a calibrated helium gas detector. With helium concentrations within the
shroud maintained, sub-slab soil vapor will be purged from the sampling point with an air pump
and collected into a Tedlar bag. The calibrated helium gas detector will be used to measure
helium concentrations within Tedlar bag sample to confirm concentrations are less than 10% of
the concentration maintained within the shroud. A minimum of three sample train volumes will
be purged from each point prior to and during the leak testing activities.
The sub-slab soil vapor samples will be collected over a 10-minute period using laboratory
supplied 1-liter Summa canisters and laboratory supplied flow regulators calibrated with an
approximate flow rate of 100 milliliters per minute. The starting vacuum should be within 10%
6
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge/akr.005 dunavant brownfields assessment/vimp/monitoring/vims effectiveness testing work plan - akr.005.doc
of the vacuum when the Summa canisters left the laboratory, or a replacement canister will be
used. The vacuum in the Summa canisters will be measured at the start and end of the sampling
event, and will be recorded by sampling personnel. The vacuum in each canister at the
conclusion of the sampling event shall remain above 0 inches of mercury (inHg), with a target
vacuum of approximately 5 inHg. Analytical results of a sample will not be accepted by DEQ if
internal vacuum for that sample reaches 0 inHg. The samples will be submitted to a qualified
laboratory under standard chain of custody protocols for full-list volatile organic compounds
(VOCs) by EPA Method TO-15. The analytical laboratory will be instructed to report vacuum
measurements up receipt and J-flag concentrations for each sample. One duplicate sub-slab soil
vapor sample for laboratory QA/QC purposes will be collected during each sampling event. In
addition, H&H will request that the laboratory report compound concentrations to the lower of
the laboratory method detection limits or the DEQ DWM Residential Vapor Intrusion Sub-Slab
and Exterior Soil Gas Screening Levels to the extent possible.
2.3 Quality Assurance / Quality Control
For quality assurance and quality control purposes (QA/QC), H&H will collect one duplicate
sub-slab soil gas sample and one duplicate indoor air sample for laboratory analysis using a
laboratory supplied “T-sampler” which allows for collection of two samples from the same
location simultaneously.
In addition, the laboratory will follow standard QA/QC procedures to ensure appropriate sample
handling, analysis, and validity of the data. QA/QC procedures will be conducted in accordance
with the method protocols and will include regular equipment maintenance, equipment
calibrations, and adherence to specific sample custody and data management procedures.
Samples will be analyzed in conjunction with appropriate blanks, laboratory duplicates,
continuing calibration standards, surrogate standards, and matrix spiking standards in accordance
with approved methodologies to monitor both instrument and analyst performance. H&H will
request that the laboratory include estimated concentrations for compounds that are detected at
levels above the laboratory method detection limit, but below the laboratory reporting limit
(J flags). Additionally, H&H will request that the laboratory use method detection limits that are
7
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge/akr.005 dunavant brownfields assessment/vimp/monitoring/vims effectiveness testing work plan - akr.005.doc
below DEQ DWM Residential Vapor Intrusion Screening Levels to the extent possible.
The laboratory analytical data report and QA/QC package for the samples submitted to and
analyzed by the subcontracted laboratory will be provided in an appendix to the final report.
Laboratory QA/QC data consistent with Level II documentation will be provided for this project.
A copy of the completed chain of custody record and shipping receipt will be appended to the
corresponding laboratory analytical report included with the final report.
2.4 Reporting
Following completion of the assessment activities and receipt of the analytical data, H&H will
document our findings in quarterly Post-Construction Indoor Air Sampling Reports and annual
reports after the first year. The report will include discussion of laboratory analytical data in
comparison to regulatory screening levels, cumulative risk calculations, and conclusions and
recommendations.
2.5 Schedule
Three post-occupancy sub-slab vapor and indoor air sampling events will be performed on a
quarterly basis for a period of one year after the apartment building is constructed/occupied.
Following the final quarterly sampling event, H&H will perform the more comprehensive annual
event. H&H will evaluate post-construction sampling results and make a recommendation to
DEQ concerning frequency of potential subsequent sampling events. If quarterly results do not
indicate the need for further quarterly testing for TCE, H&H will note this in the third quarterly
report. H&H will then begin the annual testing. Changes to the approved monitoring schedule
will not be made without DEQ's written concurrence. After three years of annual testing, H&H
will ask DEQ for approval to discontinue subslab vapor and indoor air monitoring.
8
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge/akr.005 dunavant brownfields assessment/vimp/monitoring/vims effectiveness testing work plan - akr.005.doc
3.0 Future Tenants & Building Uses
The future use of the proposed Site buildings includes one residential apartment building. After
occupancy of the Site buildings, the building maintenance department will maintain or contract
for maintenance of the vapor mitigation system. If vapor mitigation components are damaged or
need to be altered for building renovations, the building management will be instructed to
contact the maintenance department. The maintenance department shall contact a North
Carolina licensed Professional Engineer to oversee or inspect the activities, and a report shall be
submitted to DEQ detailing the repairs or alterations. To aid in identification of the vapor
mitigation piping, the piping will be labeled with “Vapor Mitigation – Contact Maintenance”, or
similar language, on all accessible piping at intervals of no greater than 10-linear feet.
Future VIMS maintenance and upkeep will be the responsibility of the property management
group or building owner. As part of the standard annual Land Use Restriction Update submittal
that is will be required as part of the pending Notice of Brownfields Property agreement, H&H
recommends the building owner or management complete a visual inspection of the exposed
parts of the system including, but not limited to, the vertical risers and ventilators on the roof and
the monitoring points. H&H recommends annual inspections be documented and kept on record
to be provided to DEQ upon request.
Table 1Proposed Post-Construction VIMS Sample Summary TableCrayton PrintingDistribution Street and Dunivant StreetCharlotte, North Carolina H&H Project No. AKR-005MP-2, MP-3, MP-6, MP-8, MP-9, MP-12, MP-15, MP-16, MP-17, MP-18, MP-19, MP-20Sub-Slab Vapor - Levels 1 and 2 Comparison to Indoor Air Sample DataAnnual 12 VOCs by EPA Method TO-15IAS-1 through IAS-12 Indoor Air - Levels 1 and 2 VIMS Efficacy Testing Annual 12 VOCs by EPA Method TO-15MP-2, MP-3, MP-6, MP-8, MP-9, MP-12 Sub-Slab Vapor - Level 1 Comparison to Indoor Air Sample DataFirst Three Quarters of First Year6 VOCs by EPA Method TO-15IAS-1 through IAS-6 Indoor Air - Level 1 VIMS Efficacy TestingFirst Three Quarters of First Year6 VOCs by EPA Method TO-15BKG-1 Ambient AirEvaluate Ambient Sources of COCsFirst Three Quarters of First Year/Annual1 VOCs by EPA Method TO-15SS-DUP Sub-Slab Vapor Duplicate QA/QCFirst Three Quarters of First Year/Annual1 VOCs by EPA Method TO-15IAS-DUP Indoor Air Duplicate QA/QCFirst Three Quarters of First Year/Annual1 VOCs by EPA Method TO-15Notes:VOCs = Volatile Organic Compounds; VIMS = Vapor Intrusion Mitigation System; COC = Compounds of Concern; QA/QC = Quality Assurance/ Quality Control; TCE = Trichloroethene; PCE = TetrachloroetheneAssumes pre-occupancy testing did not indicate the need for depressurization with active fansAssumes pre-occupancy and quarterly sampling does not indicate TCE concern for indoor airAnnual sampling may be discontinued after 3 years with DEQ's approvalVOCs include PCE, PCE degradation products, and VOCs detected in pre-occupancy subslab vapor samplesSample IDsNumber of SamplesLaboratory AnalysisSample ObjectiveSample Type Frequency (see notes)https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Akridge/AKR.005 Dunavant Brownfields Assessment/VIMP/Monitoring/Sample Summary Table.xlsxTable 1Hart & Hickman, PC
USGS The National Map: National Boundaries Dataset, 3DEP ElevationProgram, Geographic Names Information System, National HydrographyDataset, National Land Cover Database, National Structures Dataset,and National Transportation Dataset; USGS Global Ecosystems; U.S.
Census Bureau TIGER/Line data; USFS Road Data; Natural Earth Data;U.S. Department of State Humanitarian Information Unit; and NOAANational Centers for Environmental Information, U.S. Coastal ReliefModel. Data refreshed February, 2020.
SITE LOCATION MAP
CRAYTON PRINTINGDISTRIBUTION STREET AND DUNAVANT STREET CHARLOTTE, NORTH CAROLINA
REVISION NO: 0
FIGURE NO: 1
2923 South Tryon Street - Suite 100Charlotte, North Carolina 28203704-586-0007 (p) 704-586-0373 (f)License # C-1269 / # C-245 Geology
0 2,000 4,000
SCALE IN FEET
SITE
N
U.S.G.S. QUADRANGLE MAP
CHARLOTTE EAST, NORTH CAROLINA 2013
QUADRANGLE7.5 MINUTE SERIES (TOPOGRAPHIC)
DATE: 9-28-20
JOB NO. AKR-005
REVISION NO. 0
JOB NO. AKR-005
DATE: 4-1-21
FIGURE NO. 2
CRAYTON PRINTING
DISTRIBUTION STREET AND DUNAVANT STREETCHARLOTTE, NORTH CAROLINA
BROWNFIELDS PROJECT NO. 24025-20-060
SITE MAP
LEGEND
SITE PROPERTY BOUNDARY
PARCEL BOUNDARY
PROPOSED BUILDING FOOTPRINT - LEVEL 1
PROPOSED BUILDING FOOTPRINT - LEVEL 2
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
HUB SOUTH END APARTMENTS(2250 HAWKINS STREET)
JUNCTION 1504
LUXURY APARTMENTS
(1504 MAINLINE BOULEVARD)
THE DUNAVANT RESTAURANT /VACANT COMMERCIAL UNIT(2322 DUNAVANT STREET)
MULTI-TENANT COMMERCIAL BUILDING(2401 DISTRIBUTION STREET)
PET WANTS: THE URBAN FEED STORE /CHARLOTTE GRILL COMPANY(2324 DISTRIBUTION STREET)
WORLD STONE FABRICATORS INC.(2300 DISTRIBUTION STREET)
WAREHOUSE BUILDING
(2301 DISTRIBUTION STREET)
TIMELY FILTER SUPPLY
(2327 DISTRIBUTION STREET)
MULTI-TENANTCOMMERCIAL BUILDING(2326 DISTRIBUTION STREET)
VACANT OFFICE / WAREHOUSE BUILDING(FORMERLY CRAYTON PRINTING)(2321 DISTRIBUTION STREET)
VACANT MULTI-TENANTCOMMERCIAL BUILDING(2300-2306 DUNAVANT STREET)DISTRIBUTION STREETDUNAVANT STREETDUNAV
AN
T
S
TR
EE
T
HAWKINS STREETMERV PLACE
PARKING DECK
POOL / COURTYARD
AREA A
AREA B
AREA C
AREA D
LEGEND
1.AERIAL IMAGERY OBTAINED FROM MECKLENBURGCOUNTY GIS (2020).
2.DEVELOPMENT PLANS PROVIDED BY BB+M, DATED2-19-2020.S:\AAA-Master Projects\Akridge\AKR.005 Dunavant Brownfields Assessment\Figures\Site Map.dwg, FIG 2, 4/1/2021 11:43:08 AM, SVincent
ELEV. 720'
ELEV. 720'
ELEV. 732'
ELEV. 725'
ELEV. 715'5.21% UP6.57% UPFUTURE RESIDENT
PARKING
ELEV. 723'
CYCLE CENTER RESIDENT STORAGE
RISER
MECH VENT
MECH. VENT
MECH.
DOG WASH
TRASH ROOM
ELEV. 712'
ELEV. 720'
ELEV. 719'-6"
ELEV. 718'
ELEV. 727'
ELEC.
ELEV. 717'
LOADING
ZONE
ELEV. 732'
ELEV. 722'
MAINTENANCE
TRASH STAGING AREA
BIKE STORAGE
ELEC.
ELEV LOBBY
ELEV. 717'-6"
ELEV. 730'
ELEV. 727'
ELEV. 729'
MECH. VENT
MAIL
CENTER
720' - 3"
LEVEL 1 TRASH
MECH.
LEASING/ LOUNGE
SERVICE
ELEV. 1 ELEV. 2
STAIR E
PACKAGE
STAIR B
ELEV. 3 ELEV. 4
CORRIDOR
722' - 3"
720' - 3"
LEASING/ LOUNGE
STAIR A
LYFT
WAITING
AREA
OUTDOOR
AMENITY
713' - 0 3/8"
720' - 3"
POOL ROOM
CHEM.
720' - 3"
4
13 10
LANAIS ABOVE
PARKING RAMP: 1
6.30%
719' - 9"
719' - 9"
719' - 9"
720' - 3"714' - 6 3/4"
717' - 4"1" / 12"1" / 12"1" / 12"714' - 6"
714' - 6"
714' - 6"
720' - 3"
714' - 6"
717' - 9"
719' - 9"
MECH
4'x8'
4'x8'
4'x8'
6.30%
6.30%
LARGE
SCALE
WASH
719' - 9"
717' - 4"4'x8'4'x8'1/4" / 12"719' - 9"
717' - 9"
STAIR C
2.75%2.10%0.62%0.73%5.22%720' - 3"
721' - 3"
720' - 3"
720' - 3"
9
5
8
6
717' - 8"
720' - 3"
721' - 3"SLOPEDOWNHSS8X4X1/4HSS8X4X1/4SW-#1
SW-#2SW-#4SW-#5
SW-#6
SW-#7
SW-#8
SW-#9SW-#10SLOPEDOWNSLOPEUPSLOPEUPSLOPEUPJOB NO.
AKR-005
PROPOSED
QUARTERLY
& ANNUAL
INDOOR
AIR AND
SUB-SLAB
VAPOR
SAMPLE
LOCATION
MAP -
LEVEL 1
OCT 22, 2021
FIGURE NO. 3
VAPOR MITIGATION PLAN PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
ISSUED FOR CONSTRUCTION
REVISION 1CRAYTON PRINTINGDISTRIBUTION STREET AND DUNAVANT STREETCHARLOTTE, NORTH CARLINABROWNFIELDS PROJECT NO. 24025-20-060LEGEND
SLAB GRADE CHANGE
OUTDOOR OR OPEN AIR
LEVEL 2 SLAB ON GRADE AREA
MONITORING POINT LOCATION
PROPOSED SUB-SLAB VAPOR SAMPLE LOCATION
PROPOSED INDOOR AIR SAMPLE LOCATION
MP-4
MP-2
MP-3
MP-4
MP-6
MP-9
MP-10
MP-12
GROUNDLEVEL PORTION OF
LEVEL 2 (SEE FIGURE 4)
MP-11
MP-14
MP-5
MP-1
MP-7
MP-8
IAS-2
IAS-3
IAS-4
IAS-5
IAS-6
LEASING OFFICE
AND LOUNGE
STAIRWELL C
APARTMENTS
MECHANICAL AND
SUPPORT ROOMS
PACKAGE STORAGE ROOM
PARKING
GARAGE
APARTMENTS
ELEVATORS 1 & 2
STAIRWELL A
ELEVATORS 3 & 4
STAIRWELL B
STAIRWELL E
IAS-1
MP-2
S:\AAA-Master Projects\Akridge\AKR.005 Dunavant Brownfields Assessment\Figures\Sampling Map 2021.10.26.dwg, FIG 3, 10/26/2021 3:04:15 PM, sperry
4.86% UPMECH.STORAGE ELEC./ DATA
MECH.
ELEV. 726'
ELEV. 730'
ELEV. 727'
ELEV. 729'
732' - 3"
729' - 11"
732' - 3"
732' - 3"
732' - 3"
MECH.
732' - 3"
732' - 3"
MECH.
STAIR D
WELLNESS STUDIO
MECH.
CORRIDOR
CORRIDOR
CORRIDOR
CORRIDOR
CORRIDOR
732' - 3"
9
9
732' - 3"
STORAGE
6.31%6.57%16
5 2
14
10
6
12
7
SW-#1
SW-#2
SW-#3SW-#4SW-#5
SW-#6
SW-#7
SW-#8
SW-#9SW-#10VAPOR MITIGATION PLAN PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
ISSUED FOR CONSTRUCTION
CRAYTON PRINTINGDISTRIBUTION STREET AND DUNAVANT STREETCHARLOTTE, NORTH CARLINABROWNFIELDS PROJECT NO. 24025-20-060MP-20 MP-15
MP-16
MP-17MP-18
MP-19
LEGEND
OUTDOOR OR OPEN AIR
LEVEL 2 NON-SLAB ON GRADE AREA
MONITORING POINT LOCATION
PROPOSED SUB-SLAB VAPOR SAMPLE LOCATION
PROPOSED INDOOR AIR SAMPLE LOCATION
MP-16
IAS-7
IAS-8IAS-9IAS-10
IAS-11
IAS-12
JOB NO.
AKR-005
PROPOSED
ANNUAL
INDOOR
AIR AND
SUB-SLAB
VAPOR
SAMPLE
LOCATION
MAP -
LEVEL 2
OCT 22, 2021
FIGURE NO. 4
REVISION 1
LEVEL 1 SLAB ON GRADE
(SEE FIGURE 3)
STAIRWELL C
APARTMENTS
PACKAGE STORAGE ROOM
PARKING
GARAGE
ELEVATORS 1 & 2
STAIRWELL A
ELEVATORS 3 & 4
STAIRWELL B
STAIRWELL E
APARTMENTS
POOL / COURTYARD
LEVEL 1 SLAB ON GRADE
(SEE FIGURE 3)
MP-15
S:\AAA-Master Projects\Akridge\AKR.005 Dunavant Brownfields Assessment\Figures\Sampling Map 2021.10.26.dwg, FIG 4, 10/26/2021 3:03:27 PM, sperry
Attachment A
Vapor Intrusion Mitigation Plan
Sheets VM-1, VM-2, VM-3 and VM-3A
ELEV. 720'
ELEV. 720'
ELEV. 732'
ELEV. 725'
ELEV. 715'5.21% UP6.57% UPFUTURE RESIDENT
PARKING
ELEV. 723'
CYCLE CENTER RESIDENT STORAGE
RISER
MECH VENT
MECH. VENT
MECH.
DOG WASH
TRASH ROOM
ELEV. 712'
ELEV. 720'
ELEV. 719'-6"
ELEV. 718'
ELEV. 727'
ELEC.
ELEV. 717'
LOADING
ZONE
ELEV. 732'
ELEV. 722'
MAINTENANCE
TRASH STAGING AREA
BIKE STORAGE
ELEC.
ELEV LOBBY
ELEV. 717'-6"
ELEV. 730'
ELEV. 727'
ELEV. 729'
MECH. VENT
MAIL
CENTER
720' - 3"
LEVEL 1 TRASH
MECH.
LEASING/ LOUNGE
SERVICE
ELEV. 1 ELEV. 2
STAIR E
PACKAGE
STAIR B
ELEV. 3 ELEV. 4
CORRIDOR
722' - 3"
720' - 3"
LEASING/ LOUNGE
STAIR A
LYFT
WAITING
AREA
OUTDOOR
AMENITY
713' - 0 3/8"
720' - 3"
POOL ROOM
CHEM.
720' - 3"
4
13 10
LANAIS ABOVE
PARKING RAMP: 1
6.30%
719' - 9"
719' - 9"
719' - 9"
720' - 3"714' - 6 3/4"
717' - 4"1" / 12"1" / 12"1" / 12"714' - 6"
714' - 6"
714' - 6"
720' - 3"
714' - 6"
717' - 9"
719' - 9"
MECH
4'x8'
4'x8'
4'x8'
6.30%
6.30%
LARGESCALEWASH
719' - 9"
717' - 4"4'x8'4'x8'1/4" / 12"719' - 9"
717' - 9"
STAIR C
2.75%2.10%0.62%0.73%5.22%720' - 3"
721' - 3"
720' - 3"
720' - 3"
9
5
8
6
717' - 8"
720' - 3"
721' - 3"SLOPEDOWNHSS8X4X1/4HSS8X4X1/4SW-#1
SW-#2SW-#4SW-#5
SW-#6
SW-#7
SW-#8
SW-#9SW-#10SLOPEDOWNSLOPEUPSLOPEUPSLOPEUPVAPOR MITIGATION PLAN PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
LEGEND
SLAB GRADE CHANGE
THICKENED SLAB
OUTDOOR OR OPEN AIR
LEVEL 2 SLAB ON GRADE AREA
EXTENT OF VAPOR LINER
3" DIA SCH 40 SLOTTED PVC PIPE
3" DIA SCH 40 SOLID PVC PIPE
4" DIA SCH 40 SOLID PVC PIPE
3" DIA SCH 40 SOLID PVC VERTICAL RISER WITH
FAN IDENTIFICATION NUMBER (REFER TO DETAIL
NUMBER 23 ON SHEET VM-3A)
2" DIA SOLID PVC PRESSURE MONITORING POINTWITH FLUSH-MOUNTED COVER OR EXTERIOR
ACCESS PANEL
F-7
MP-4
F-1
F-2
F-3
F-4
F-5
F-6
F-8
MP-2
MP-3
MP-4
MP-6
MP-9
MP-10
MP-12
SEE VM-2 FOR
LEVEL 2 VIMS
LAYOUT
MP-11
MP-14
MP-5
MP-1
MP-7
MP-8
3" VENT CAP AT ENDSOF SLOTTED PIPE(TYP)
SCH 40 PVC TEE
(TYP)
4" TO 3" SCH 40 PVCREDUCER (TYP)
3" TO 4" SCH 40 PVCREDUCER (TYP)
1
VM-3
22
VM-3A
10
VM-3
6/23
VM-3/A
5
VM-3
22
VM-3A
9
VM-3
24
VM-3A
10
VM-3
17
VM-3
7/23
VM-3/A
9
VM-3
5
VM-3
16
VM-3
14
VM-3
14
VM-3
2
VM-3
6
VM-3 16
VM-3
SCH 40 PVC TEE(TYP)
3" VENT CAP AT ENDSOF SLOTTED PIPE(TYP)
3" VENT CAP AT ENDSOF SLOTTED PIPE(TYP)
15
VM-3
15
VM-3
5
VM-3
25
VM-3A
12
VM-3
12
VM-3
25
VM-3A
18
VM-3
20
VM-3
20
VM-3
11/23
VM-3/A
18
VM-3
21/22
VM-3A
F-7
11/23
VM-3/A
4
VM-3
4
VM-3
21
VM-3A
6/23
VM-3/A
12
VM-3
3
VM-3
22
VM-3A
14
VM-3
8
VM-3
12
VM-3
22
VM-3A
12
VM-3
1
VM-3
13
VM-3
3
VM-3
21
VM-3A
21
VM-3A
13
VM-3
H&H NO. AKR-005
VIMS LAYOUT -LEVEL 2
APRIL 1, 2021
VM-1
PROFESSIONALAPPROVAL
REVISION 1CRAYTON PRINTINGDISTRIBUTION STREET AND DUNAVANT STREETCHARLOTTE, NORTH CARLINABROWNFIELDS PROJECT NO. 24025-20-06021
VM-3A
3
VM-3
S:\AAA-Master Projects\Akridge\AKR.005 Dunavant Brownfields Assessment\VIMP\Figures\Addendum\VIMS-2021.03.30-Combined.dwg, VM-1, 4/1/2021 2:14:50 PM, SVincent
4.86% UPMECH.STORAGE ELEC./ DATA
MECH.
ELEV. 726'
ELEV. 730'
ELEV. 727'
ELEV. 729'
732' - 3"
729' - 11"
732' - 3"
732' - 3"
732' - 3"
MECH.
732' - 3"
732' - 3"
MECH.
STAIR D
WELLNESS STUDIO
MECH.
CORRIDOR
CORRIDOR
CORRIDOR
CORRIDOR
CORRIDOR
732' - 3"
9
9
732' - 3"
STORAGE
6.31%6.57%16
5 2
14
10
6
12
7
SW-#1
SW-#2
SW-#3SW-#4SW-#5
SW-#6
SW-#7
SW-#8
SW-#9SW-#10H&H NO. AKR-005
VIMS LAYOUT -LEVEL 2
APRIL 1, 2021
VM-2
VAPOR MITIGATION PLAN PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PROFESSIONALAPPROVAL
REVISION 1CRAYTON PRINTINGDISTRIBUTION STREET AND DUNAVANT STREETCHARLOTTE, NORTH CARLINABROWNFIELDS PROJECT NO. 24025-20-060LEGEND
THICKENED SLAB
OUTDOOR OR OPEN AIR
LEVEL 1 SLAB ON GRADE AREA
EXTENT OF VAPOR LINER
3" DIA SCH 40 SLOTTED PVC PIPE
3" DIA SCH 40 SOLID PVC PIPE
3" DIA SCH 40 SOLID PVC VERTICAL RISER WITH
FAN IDENTIFICATION NUMBER (REFER TO DETAIL
NUMBER 23 ON SHEET VM-3A)
2" DIA SOLID PVC PRESSURE MONITORING POINT
WITH FLUSH-MOUNTED COVER OR EXTERIORACCESS PANEL
F-10
MP-17
F-9
F-10
F-11
F-12
F-13
F-14
F-15
F-16
F-17
MP-20 MP-15
MP-16
MP-17MP-18
MP-19
SEE VM-1 FOR
LEVEL 1 VIMSLAYOUT
SEE VM-1 FOR
LEVEL 1 VIMS
LAYOUT
3" VENT CAP AT ENDSOF SLOTTED PIPE(TYP)
SCH 40 PVC TEE(TYP)
90-DEGREE SCH 40PVC ELBOW (TYP)
SCH 40 PVC TEE(TYP)
6
VM-3
7/23
VM-3/A 7/23
VM-3/A
23
VM-3A
21
VM-3A
3" VENT CAP AT ENDSOF SLOTTED PIPE(TYP)
2
VM-3
15
VM-3
12
VM-3
12
VM-31
VM-3
15
VM-3
22
VM-3A
19
VM-3
19
VM-3
PACKAGE ROOM
18
VM-3
18
VM-3
12
VM-3
1
VM-3
7/23
VM-3/A
3" VENT CAP AT ENDSOF SLOTTED PIPE(TYP)
12
VM-3
4
VM-3
12
VM-3
19
VM-3
19
VM-3
2
VM-3
7/23
VM-3/A
2
VM-3
3" VENT CAP AT ENDSOF SLOTTED PIPE(TYP)
7/23
VM-3/A
22
VM-3A
S:\AAA-Master Projects\Akridge\AKR.005 Dunavant Brownfields Assessment\VIMP\Figures\Addendum\VIMS-2021.03.30-Combined.dwg, VM-2, 4/1/2021 2:15:25 PM, SVincent
VIMS VAPOR LINER AND BASE COURSE (TYP)1VAPOR LINER (SEE SPECIFICATION #1)CONCRETE FLOOR SLABNTSVM-3VIMS SLOTTED COLLECTION PIPING (TYP)2VAPOR LINER (SEE SPECIFICATION #1)NTSCONCRETE FLOOR SLABVM-3BASE COURSE - CLEAN # 57 STONE (WASHEDWITH NO FINES), MIN 5" THICK BENEATH VIMSVAPOR LINER3" SCH 40 SLOTTED PVC PIPESET WITHIN MIN 5" BASE COURSESUB-BASESUB-BASEBASE COURSE - CLEAN # 57 STONE (WASHEDWITH NO FINES), MIN 5" THICK BENEATH VIMSVAPOR LINERVIMS VAPOR LINER AT INTERIOR THICKENED SLAB (TYP)NTS3VM-3CONCRETEFLOOR SLABBASE COURSE(SEE SPECIFICATION #1)VAPOR LINER(SEE SPECIFICATION #1)SUB-BASEWALL (VARIES)VIMS VAPOR LINER AT EXTERIOR THICKENED SLAB (TYP)NTS4VM-3VAPOR LINER(SEE SPECIFICATION #1)SOIL SUB-BASE. GRAVEL BETWEEN OPENAIR PARKING GARAGE AND OCCUPIEDSPACE SHALL BE DISCONTINUOUS WITHMINIMUM 1-FT OF SOIL IN HORIZONTALDIRECTION BETWEEN GRAVEL LAYERS(SEE SPECIFICATION #8)WALL (VARIES)OPEN AIRPARKING GARAGEOCCUPIED SPACEVAPOR LINER SEALED TO CONCRETE PERMANUFACTURERS INSTRUCTIONS (TYP)MINIMUM 5" THICKENED SLAB THICKNESSVIMS PIPING THROUGH FOOTING (TYP)NTS5VM-3CONCRETEFLOOR SLABBASE COURSE(SEE SPECIFICATION #1)SUB-BASESOLID 3"SCH 40 PVCSOLID TO SLOTTED 3" SCH 40PVC PIPE TRANSITION (SLIPCOUPLING OR THREADED JOINT)VAPOR LINER (SEESPECIFICATION #1)WALL (VARIES) PIPE SLEEVETHROUGH FOOTINGPIPE SLEEVE SHALL NOTPENETRATE VAPOR LINER(SEE SPECIFICATION #11)SLEEVE FOR FULL LENGTH OF PROJECTIONVAPOR LINER SEALED TO PIPE PERMANUFACTURER INSTRUCTIONS (TYP)VIMS AT VERTICAL RISERS WITH 90 DEGREE ELBOW (TYP)NTS7VM-3BASE COURSE(SEE SPECIFICATION #1)SUB-BASEVAPOR LINER SEALED TO PIPE PERMANUFACTURER INSTRUCTIONSVAPOR LINER(SEE SPECIFICATION #1)3" SCH 40 PVC RISER DUCT PIPE(SEE SPECIFICATION #3, #4 & #5)WALL (VARIES)3" SCH 40 PVC90-DEGREE ELBOWSOLID TO SLOTTED 3" SCH 40PVC PIPE TRANSITION (SLIPCOUPLING OR THREADED JOINT)VIMS AT SLAB STEP WITH RISER DUCT PIPING (TYP)NTS11VM-3SUB-BASECONCRETE FLOOR SLABVAPOR LINER(SEE SPECIFICATION #1)SOLID 3" SCH 40 PVC(SEE SPECIFICATION #2)BASE COURSE(SEE SPECIFICATION #1)WALL (VARIES)SOLID TO SLOTTED 3" SCH 40 PVCPIPE TRANSITION (SLIP COUPLINGOR THREADED JOINT)VAPOR LINER SEALED TO PIPEPER MANUFACTURERINSTRUCTIONS (TYP)3" SCH 40 PVC90-DEGREE ELBOW3" SCH 40 PVC90-DEGREE TEEPIPE SLEEVE (SEE SPECIFICATION #11)VIMS AT DEPRESSIONS IN SLAB-ON-GRADE (TYP)NTS9VM-3CONCRETE FLOOR SLABSUBBASEVAPOR BARRIER(SEE SPECIFICATION #1)BASE COURSE(SEE SPECIFICATION #1)VIMS PIPING THROUGH DEPRESSIONS IN SLAB-ON-GRADE (TYP)NTS10VM-3SUB-BASECONCRETE FLOOR SLABVAPOR LINER(SEE SPECIFICATION #1)BASE COURSE(SEE SPECIFICATION #1)SOLID TO SLOTTED 3" SCH 40PVC PIPE TRANSITION (SLIPCOUPLING OR THREADED JOINT)3" SCH 40 PVC90-DEGREE ELBOWVAPOR LINER SEALED TOPIPE PER MANUFACTURERINSTRUCTIONSSOLID 3" SCH 40 PVC(SEE SPECIFICATION #5)PIPE SLEEVE (SEESPECIFICATION #11)WALL (VARIES)VIMS AT EXTERIOR FOOTING (TYP)NTSVM-38CONCRETE FLOOR SLABVAPOR LINER SEALED TO CONCRETEPER MANUFACTURERS INSTRUCTIONSVAPOR LINER(SEE SPECIFICATION #1)BASE COURSE(SEE SPECIFICATION #1)SUB-BASEEXTERIOR GRADE(VARIES)WALL (VARIES)VAPOR LINER EXTENDED TO EXTERIOR SIDE OFFOOTER, IF POSSIBLE, BASED ON CONSTRUCTIONSEQUENCE. ENGINEER WILL APPROVE FINAL VAPORLINER TERMINATION POINT DURING CONSTRUCTIONCOLUMN BLOCKOUTVIMS AT EXTERIOR COLUMN (TYP)NTS15VM-3SUB-BASECONCRETEFLOOR SLABBASE COURSE(SEE SPECIFICATION #1)VAPOR LINER(SEE SPECIFICATION #1)CIP CONCRETE COLUMNVAPOR LINER SEALEDTO CONCRETE PERMANUFACTURERSINSTRUCTIONSVIMS AT INTERIOR COLUMN (TYP)NTS14VM-3SUB-BASECONCRETE FLOOR SLABBASE COURSE(SEE SPECIFICATION #1)VAPOR LINER(SEE SPECIFICATION #1)CIP CONCRETE COLUMNCONCRETE FOOTINGVAPOR LINER SEALED OUTSIDE OFCONCRETE COLUMN PERMANUFACTURER INSTRUCTIONSVIMS AT VERTICAL RISERS WITH TEE (TYP)NTS6VM-3BASE COURSE(SEE SPECIFICATION #1)SUB-BASESOLID 3" SCH 40 PVCVAPOR LINER SEALED TO PIPE PERMANUFACTURER INSTRUCTIONSVAPOR LINER(SEE SPECIFICATION #1)SOLID TO SLOTTED 3" SCH 40PVC PIPE TRANSITION (SLIPCOUPLING OR THREADED JOINT)3" SCH 40 PVC RISER DUCT PIPE(SEE SPECIFICATION #3, #4 & #5)WALL (VARIES)3" SCH 40 PVC TEEVAPOR LINERBENEATH THICKENED SLABVAPOR BARRIER AT STAIR THICKENED SLAB13NTSSTAIR STRINGERSUBBASEBASE COURSE(SEE SPECIFICATION #1)VM-3CONCRETE FLOORSLABVAPOR LINER(SEE SPECIFICATION #1)WALL (VARIES)BASE COURSE(SEE SPECIFICATION #1)SUB-BASEVAPOR LINER(SEE SPECIFICATION #1)WALL (VARIES)VAPOR BARRIER AT SLAB EDGE12NTSVM-3WALL (VARIES)BASE COURSE(SEE SPECIFICATION #1)SUB-BASEVAPOR LINER(SEE SPECIFICATION #1)OPEN AIR PATIO /TERRACEVIMS PIPING THROUGH FOOTING WITH REDUCER (TYP)NTS16VM-3CONCRETE FLOOR SLABBASE COURSE(SEE SPECIFICATION #1)SUB-BASESOLID 4" SCH 40 PVC4" TO 3" SCH 40PVC REDUCERVAPOR LINER (SEESPECIFICATION #1)WALL (VARIES) PIPE SLEEVETHROUGH FOOTINGPIPE SLEEVE SHALL NOTPENETRATE VAPOR LINER(SEE SPECIFICATION #11)VAPOR LINER SEALED TO PIPE PERMANUFACTURER INSTRUCTIONS (TYP)SLOTTED 3-INCHSCH 40 PIPE OPEN AIR SPACEVIMS AT RETAINING WALL ADJACENT TO ENCLOSED SPACE (TYP)NTS18VM-3 OCCUPIED SPACEOCCUPIED SPACESUB-BASEBASE COURSE(SEE SPECIFICATION #1)VAPOR LINER(SEE SPECIFICATION #1)VAPOR LINER SEALED TO OUTSIDE OF CONCRETEAND WATERPROOFING/INSULATION (WHEREPRESENT) PER MANUFACTURER INSTRUCTIONS WATERPROOFING ANDRIGID INSULATIONDRAINWALL (VARIES)CONCRETEFLOOR SLABVIMS AT RETAINING WALL ADJACENT TO OPEN AIR SPACE (TYP)NTS19VM-3 INTERIOR SPACEOPEN AIR SPACESUB-BASECONCRETEFLOOR SLABBASE COURSE(SEE SPECIFICATION #1)VAPOR LINER(SEE SPECIFICATION #1) WATERPROOFING ANDRIGID INSULATIONDRAINWALL (VARIES)VIMS SOLID PIPING THROUGH SLAB STEP (TYP)NTS17VM-3SUB-BASECONCRETE FLOOR SLABVAPOR LINER(SEE SPECIFICATION #1)BASE COURSE(SEE SPECIFICATION #1)3" SCH 40 PVC90-DEGREE ELBOWVAPOR LINER SEALED TO PIPE PERMANUFACTURER INSTRUCTIONS (TYP)SOLID 3" SCH 40 PVC(SEE SPECIFICATION #5)PIPE SLEEVE (SEE SPECIFICATION #11)VIMS AT RETAINING WALL ADJACENT TO OCCUPIED SPACE (TYP)NTS20VM-3 OPEN AIR SPACEOCCUPIED SPACESUB-BASEBASE COURSE(SEE SPECIFICATION #1)VAPOR LINER(SEE SPECIFICATION #1)VAPOR LINER SEALED TO OUTSIDE OF CONCRETEAND WATERPROOFING/INSULATION (WHEREPRESENT) PER MANUFACTURER INSTRUCTIONS WATERPROOFING ANDRIGID INSULATIONDRAINWALL (VARIES)CONCRETEFLOOR SLABVAPOR MITIGATION PLAN PREPARED BY:2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)License # C-1269 / #C-245 GeologyISSUED FOR CONSTRUCTIONNOTES:VIMS = VAPOR INTRUSION MITIGATION SYSTEMTYP = TYPICALSCH = SCHEDULEPVC = POLYVINYL CHLORIDENTS = NOT TO SCALEALL PIPE MEASUREMENTS ARE BY DIAMETERH&H NO. AKR-005VIMS DETAILS#1 - 20APRIL 1, 2021VM-3PROFESSIONALAPPROVALREVISION 1CRAYTON PRINTING
DISTRIBUTION STREET AND DUNAVANT STREET
CHARLOTTE, NORTH CARLINA
BROWNFIELDS PROJECT NO. 24025-20-060
S:\AAA-Master Projects\Akridge\AKR.005 Dunavant Brownfields Assessment\VIMP\Figures\Addendum\VIMS Details.dwg, VM-3, 4/1/2021 2:16:09 PM, SVincent
VIMS TURBINE VENTILATOR FAN & EXHAUST (TYP)23NTSTURBINE VENTILATOR FAN(EMPIRE MODEL TV04SS OR ENGINEERAPPROVED EQUIVALENT)OUTDOOR-RATED ELECTRICAL JUNCTION BOX FORPOTENTIAL FUTURE VACUUM FAN (REFER TOSPECIFICATION #4) RISER DUCT PIPE THROUGH ROOFFLASHINGROOFTOPVM-3A4" X3" HEAVY DUTY NOHUB COUPLINGSLP.VIMS AT RAMP (TYP)NTS24VM-3ASUB-BASESLOTTED 3-INCHSCH 40 PIPEVAPOR LINER(SEE SPECIFICATION #1)CONCRETE FLOOR SLABBASE COURSE(SEE SPECIFICATION #1)T.O.C.25NTSVM-3AVIMS AT ELEVATOR PIT (TYP)CONTINUOUS VAPOR LINERSEALED PER MANUFACTURERINSTRUCTIONSSUMP PITSUB-BASEBASE COURSE(SEE SPECIFICATION #1)VAPOR LINER(SEE SPECIFICATION #1)OVERLAP WATERPROOFING WITHVAPOR BARRIER TO CREATECONTINUOUS SEALCONTINUOUS 60-MILWATERPROOFING MEMBRANE(SEE SPECIFICATION #13)EXTERIOR PERMANENT VACUUM MEASURING POINT (TYP)22NTSVM-3AWALL (VARIES)PROVIDE LOCKABLE WEATHERPROOFENCLOSURE ON OUTSIDE OF BUILDINGWALL (OR SIMILAR). AFFIX LABEL ATBOX WITH "VAPOR MITIGATION SYSTEM".PLACE REMOVABLE PIPE PLUG AT ENDOF 2" PIPE.VAPOR LINER SEALED TO CONCRETE PERMANUFACTURERS INSTRUCTIONS (TYP)2" SCH 40 PVC 90DEGREE ELBOW2" SOLID SCH 40 PVC PIPEINSTALLER SHALL SECURE PIPE TOPREVENT MOVEMENT OR DAMAGE TOPIPE DURING THE CONCRETE POUREXTERIOR GRADE(VARIES)BASE COURSE(SEE SPECIFICATION #1)2" OPEN ENDED PIPE, PLACED AT A MINIMUM OF5' FROM EXTERIOR TURN-DOWN SLABSVENT PIPE PROTECTION SCREENPIPE SLEEVE. SEE SPECIFICATION #11. SLEEVESHALL NOT PENETRATE VAPOR LINER.VAPOR LINER(SEE SPECIFICATION #1)VAPOR LINER SEALED TO PIPE PERMANUFACTURERS INSTRUCTIONS (TYP)FINISHED FLOOR SLAB2" SCH 40 PVC SET WITHIN GRAVEL LAYER(SEE DETAIL 14 & 15)2" DRAIN EXPANSION TEST PLUGVIMS MONITORING POINT - TYPICAL DETAIL VIEWNTS21VM-3AVAPOR BARRIER PENETRATION SEALED TOPIPE PER MANUFACTURER INSTRUCTIONS2" SCH 40 PVC 90 DEGREE ELBOWFLOOR CLEANOUT, ADJUSTABLE, 4" DIA ZURNINDUSTRIES MODEL #CO2450-PV4 (OR ENGINEERAPPROVED EQUIVALENT) FLUSH WITH FINISHED FLOORBASE COURSE(SEE SPECIFICATION #1)4" x 2" FLUSH REDUCERBUSHING2" VENT PIPEPROTECTION SCREENVAPOR MITIGATION PLAN PREPARED BY:2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)License # C-1269 / #C-245 GeologyISSUED FOR CONSTRUCTIONVIMS SPECIFICATIONS1.VIMS VAPOR LINER SHALL BE VAPORBLOCK PLUS 20 (VBP20) 20-MIL VAPOR LINER MANUFACTURED BY RAVEN INDUSTRIES (RAVEN). AS AN ALTERNATIVE, DRAGO WRAP 20-MIL VAPOR LINERMANUFACTURED BY STEGO INDUSTRIES, LLC (STEGO) CAN BE USED, PENDING APPROVAL BY THE ENGINEER.NOTE THAT ONE VAPOR LINER PRODUCT AND ASSOCIATED ACCESSORIES MUST BE USED THROUGHOUT EACH SYSTEM. TWO DIFFERENT VAPOR LINER PRODUCTS SHALL NOT BE SEALED TOGETHER. THEVAPOR LINER SHALL BE INSTALLED AS SPECIFIED HEREIN AND PER MANUFACTURER INSTALLATION INSTRUCTIONS TO CREATE A CONTINUOUS LINER BELOW MITIGATED AREAS, AND ALONG RETAININGWALLS AND SLAB-ON-GRADE FOLDS WITHIN THE EXTENT OF VAPOR LINER BOUNDARY. A MINIMUM 5-INCH THICK BASE COURSE CONSISTING OF CLEAN #57 STONE (WASHED WITH NO FINES) SHALL BEINSTALLED BENEATH THE VIMS VAPOR LINER. A SIMILAR HIGH PERMEABILITY STONE MAY BE USED, PENDING APPROVAL BY THE ENGINEER.THE VAPOR LINER SHALL BE PROPERLY SEALED IN ACCORDANCE WITH THE MANUFACTURER INSTALLATION INSTRUCTIONS AS SPECIFIED IN THESE DRAWINGS TO FOOTERS, SLAB STEPS, RETAINING WALLS,PENETRATIONS (SUCH AS PIPE PENETRATIONS), OR OTHER BUILDING COMPONENTS WITHIN THE VIMS EXTENTS. VAPOR LINER SHALL BE INSTALLED UNDER CMU WALLS WHICH SUPPORT OCCUPIEDENCLOSED SPACES.VAPOR BARRIER SHALL BE INSTALLED ON SLABS, WALLS, AND OTHER STRUCTURAL COMPONENTS WHICH COME IN CONTACT WITH BOTH AN OCCUPIABLE ENCLOSED SPACE AND SOIL.VAPOR BARRIER SHALL BE TERMINATED PRIOR TO CONTACT WITH NON-MITIGATED AREAS, INCLUDING THE GROUND SURFACE.ALL CONCRETE BOXOUTS, INCLUDING BUT NOT LIMITED TO SHOWER/BATH TUB DRAINS, SHALL HAVE A CONTINUOUS VAPOR LINER INSTALLED BELOW.2.SUB-SLAB SLOTTED VAPOR COLLECTION PIPE SHALL BE THREADED FLUSH JOINT 3" SCH 40 PVC PIPE WITH 0.020" SLOT WIDTH AND 18" SLOT SPACING. PVC PIPE JOINTS SHALL BE CONNECTED USING PVCSOCKET COUPLINGS AND PVC GLUE. SLOTTED COLLECTION PIPING SHALL BE SET WITHIN A MINIMUM 5” BASE COURSE LAYER, WITH APPROXIMATELY 1” OF BASE COURSE MATERIAL ABOVE AND BELOW THEPIPING. VIMS BELOW AND ABOVE GRADE SOLID PIPING SHALL NOT BE TRAPPED AND SHALL BE SLOPED A MINIMUM OF 1/8 UNIT VERTICAL BY 12 UNITS HORIZONTAL (1% SLOPE) TO GRAVITY DRAIN.3.3" SCH 40 PVC RISER DUCT PIPING SHALL BE INSTALLED TO CONNECT EACH SLAB PENETRATION LOCATION TO A ROOFTOP EXHAUST DISCHARGE POINT WITH TURBINE FAN (SEE SPECIFICATION #4).ABOVE-SLAB RISER DUCT PIPE RUNS BETWEEN THE SLAB PENETRATION AND THE ROOFTOP EXHAUST DISCHARGE SHALL BE INSTALLED PER APPLICABLE BUILDING CODE AND AS SPECIFIED IN THECONSTRUCTION DOCUMENTS AND DRAWINGS. VERTICAL RISER PIPING MUST BE INSTALLED PER 2018 NORTH CAROLINA STATE PLUMBING CODE.4.3” SCH 40 PVC RISER DUCT PIPING SHALL EXTEND IN A VERTICAL ORIENTATION THROUGH THE BUILDING ROOF AND TERMINATE A MINIMUM OF 2 FT ABOVE THE BUILDING ROOF LINE. EMPIRE MODELTV04SS STAINLESS STEEL TURBINE VENTILATOR FANS (OR ALTERNATE APPROVED BY ENGINEER) SHALL BE INSTALLED ON THE EXHAUST DISCHARGE END OF EACH RISER DUCT PIPE. A 3" HEAVY DUTY NO HUBCOUPLING SHALL BE INSTALLED AT THE DISCHARGE END OF THE 3" RISER DUCT PIPE AND THE FAN SHALL BE SECURED TO THE PVC RISER IN A VERTICAL ORIENTATION. EXHAUST DISCHARGE LOCATIONSSHALL BE A MINIMUM OF 10 FT FROM ANY OPERABLE OPENING OR AIR INTAKE INTO THE BUILDING. NOTE THAT DISCHARGE LOCATIONS ON THE ROOFTOP DEPICTED IN THE VAPOR MITIGATION PLAN MAYBE REPOSITIONED AS LONG AS THE NEW POSITION MEETS THE REQUIREMENTS PRESENTED ABOVE, PENDING ENGINEER APPROVAL. AN ELECTRICAL JUNCTION BOX (120V, 60HZ AC REQUIRED) FOROUTDOOR USE SHALL BE INSTALLED NEAR THE FAN LOCATION ON THE ROOFTOP FOR POTENTIAL FUTURE CONVERSION TO ELECTRIC FANS, IF REQUIRED. ALL WIRING AND ELECTRICAL SHALL BE INSTALLEDPER APPLICABLE BUILDING AND ELECTRICAL CODES.5.ABOVE-SLAB ACCESSIBLE RISER DUCT PIPING SHALL BE PERMANENTLY IDENTIFIED BY MEANS OF A TAG OR STENCIL AT A MINIMUM OF ONCE EVERY 10-LINEAR FT WITH "VAPOR MITIGATION. CONTACTMAINTENANCE". LABELS SHALL ALSO BE FIXED TO THE TURBINE FANS IN AN ACCESSIBLE LOCATION ON THE ROOFTOP.6.MONITORING POINTS SHALL CONSIST OF 2-INCH DIAMETER SCH 40 PVC PIPE WITH A 90-DEGREE ELBOW TO FORM AN “L” SHAPE. A MINIMUM OF 5” SECTION OF PIPING SHALL BE SET WITHIN THE BASECOURSE LAYER WITH A VENT PIPE PROTECTION SCREEN AT THE TERMINATION. THE PIPE TERMINATION SHALL BE ENCASED WITHIN THE BASE COURSE LAYER. THE HORIZONTAL PIPING SHALL BE SLOPED AMINIMUM OF 1/8 UNIT VERTICAL BY 12 UNITS HORIZONTAL (1% SLOPE) TO GRAVITY DRAIN TOWARDS THE PIPE TERMINATION AND PREVENT MOISTURE FROM COLLECTING AT THE 90-DEGREE ELBOW. A4-INCH DIAMETER ADJUSTABLE FLOOR CLEAN-OUT (ZURN INDUSTRIES MODEL #CO2450-PV4, OR EQUIVALENT) SHALL BE INSTALLED AND SET FLUSH WITH THE CONCRETE SURFACE. EXTERIOR MONITORINGPOINT RISERS SHALL INCLUDE OF TWO 90-DEGREE ELBOWS TO FORM AN "S" SHAPE. THE PIPE TERMINATION SHALL BE COVERED IN A WEATHERPROOF ENCLOSURE ON OUTSIDE OF WALL. THE PIPETERMINATION SHALL BE APPROXIMATELY 2' ABOVE THE EXTERIOR GRADE.7.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL USE "LOW OR NO VOC" PRODUCTS AND MATERIALS, WHEN POSSIBLE. THE CONSTRUCTION CONTRACTOR AND SUB-CONTRACTORS SHALLPROVIDE SAFETY DATA SHEETS (SDS) TO THE ENGINEER FOR THE PRODUCTS AND MATERIALS USED FOR CONSTRUCTION OF THE VIMS.8.IN INSTANCES WHERE A THICKENED FOOTING OR RETAINING WALL IS NOT SPECIFIED AT THE EXTENT OF VAPOR LINER, A THICKENED SLAB OR FOOTER SHALL BE INSTALLED BY THE CONTRACTOR THATINCLUDES A SOIL SUBBASE. THE ADDITIONAL THICKENED SLAB OR FOOTER SHALL ALLOW FOR DISCONTINUOUS GRAVEL BETWEEN THE VIMS EXTENTS AND EXTERIOR PORTIONS OF THE BUILDING WITH ATLEAST 12" SEPARATION OF ADJACENT GRAVEL BEDS. THE THICKENED SLAB OR FOOTER SHALL BE A MINIMUM OF 5" GREATER IN THICKNESS THAN THE SURROUNDING SLAB.9.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL AVOID THE USE OF TEMPORARY FORM BOARDS THAT PENETRATE THE VAPOR LINER WHERE POSSIBLE. IF TEMPORARY FORM BOARDS AREUSED, THE SIZE AND NUMBER OF PENETRATIONS THROUGH THE VAPOR LINER SHALL BE LIMITED AND SMALL DIAMETER STAKES (I.E. METAL STAKES) SHALL BE USED. IN ALL CASES, AS FORM BOARDS AREREMOVED, THE CONTRACTOR OR SUB-CONTRACTORS SHALL RESEAL ALL PENETRATIONS IN ACCORDANCE WITH VAPOR LINER MANUFACTURER INSTALLATION INSTRUCTIONS.10.INSPECTIONS: INSPECTIONS OF EACH COMPONENT OF THE VIMS SHALL BE CONDUCTED BY THE ENGINEER, OR ENGINEER'S DESIGNEE, TO CONFIRM VIMS COMPONENTS ARE INSTALLED PER THE APPROVEDDESIGN. THE REQUIRED INSPECTION COMPONENTS INCLUDE: (1) INSPECTION OF SUB-SLAB PIPING LAYOUT, (2) GRAVEL PLACEMENT, AND (3) MONITORING POINT PLACEMENT PRIOR TO INSTALLING VAPORBARRIER; (4) INSPECTION OF VAPOR BARRIER PRIOR TO POURING CONCRETE; (5) INSPECTION OF ABOVE-GRADE PIPING LAYOUT; AND (6) INSPECTION OF TURBINE FANS AND RISER DUCT PIPE CONNECTIONS.INSPECTIONS WILL BE COMBINED WHEN POSSIBLE DEPENDING ON THE CONSTRUCTION SEQUENCE/SCHEDULE. THE CONSTRUCTION CONTRACTOR(S) SHALL COORDINATE WITH THE ENGINEER TO PERFORMTHE REQUIRED INSPECTIONS. A MINIMUM 48-HOUR NOTICE SHALL BE GIVEN TO THE ENGINEER PRIOR TO THE REQUIRED INSPECTION(S).11.FOAM PIPE SLEEVES, OR SIMILAR, SHALL BE INSTALLED AROUND HORIZONTAL PORTIONS OF PIPES THAT PENETRATE CONCRETE FOOTERS AND WALLS PER APPLICABLE STRUCTURAL PLANS AND BUILDINGCODES, OR AS OTHERWISE DIRECTED BY THE APPLICABLE PLANS AND CONSTRUCTION ENGINEERS. PIPE SLEEVES SHALL BE PROPERLY SEALED TO PREVENT A PREFERENTIAL AIR PATHWAY FROM BELOW THESLAB INTO THE BUILDING. PIPE SLEEVES SHALL BE INSTALLED ONLY IN SECTIONS OF THE VIMS WHICH WILL COME INTO DIRECT CONTACT WITH CONCRETE.12.THIS VAPOR MITIGATION PLAN IS INTENDED TO BE USED FOR DIRECTION OF VIMS COMPONENT INSTALLATION ONLY AND IS NOT INTENDED TO GUIDE CONSTRUCTION OF STRUCTURAL COMPONENTS NOTRELATED TO THE VIMS. CONSTRUCTION CONTRACTOR SHALL VERIFY CONSISTENCY OF VIMS DETAILS WITH APPLICABLE STRUCTURAL, ARCHITECTURAL, MECHANICAL, & PLUMBING PLANS AND RESOLVE ANYINCONSISTENCIES PRIOR TO VIMS INSTALLATION.13.WATERPROOFING USED ALONG ELEVATOR PITS AND INTERIOR RETAINING WALLS SHALL EXHIBIT THE CHARACTERISTICS OF AN ASTM E1745 VAPOR RETARDER CLASS A MATERIAL, OR OTHERWISE APPROVEDBY THE DESIGN ENGINEER. THESE CHARACTERISTICS INCLUDE A MINIMUM 60-MIL THICKNESS, PERMEANCE OF LESS THAN <0.1 PERMS, MINIMUM TENSILE STRENGTH OF 45 PSI, AND MINIMUM PUNCTURERESISTANCE OF 2,200 GRAMS. THE PROFESSIONAL ENGINEER SEALING THIS PLAN STATES THAT SUCH WATERPROOFING WITH THESE CHARACTERISTICS IN THESE LIMITED LOCATIONS WILL MITIGATE VAPORINTRUSION. THE VAPOR BARRIER SHALL BE INSTALLED BETWEEN WATERPROOFING AND ANY DRAINAGE FEATURES WHERE IT OVERLAPS (SEE DETAIL #25). THE INSTALLER SHALL CONFIRM THAT THEWATERPROOFING PRODUCTS USED DURING CONSTRUCTION ARE COMPATIBLE WITH THE SPECIFIED VAPOR BARRIER. VAPOR BARRIER SHALL BE CONTINUOUS IF WATERPROOFING IS NOT APPLIED.NOTES:VIMS = VAPOR INTRUSION MITIGATION SYSTEMTYP = TYPICALSCH = SCHEDULEPVC = POLYVINYL CHLORIDENTS = NOT TO SCALEALL PIPE MEASUREMENTS ARE BY DIAMETERH&H NO. AKR-005VIMS DETAILS#21 - 25 ANDSPECIFICATIONSAPRIL 1, 2021VM-3APROFESSIONALAPPROVALREVISION 1CRAYTON PRINTING
DISTRIBUTION STREET AND DUNAVANT STREET
CHARLOTTE, NORTH CARLINA
BROWNFIELDS PROJECT NO. 24025-20-060
S:\AAA-Master Projects\Akridge\AKR.005 Dunavant Brownfields Assessment\VIMP\Figures\Addendum\VIMS Details.dwg, VM-3A, 4/1/2021 2:16:41 PM, SVincent
Attachment B
Vapor Intrusion Assessment Data Summary
Table 4 Summary of Sub-Slab Vapor and Soil Gas Analytical DataCrayton Printing Charlotte, North CarolinaH&H Job No. AKR-005Evaluation AreaSample IDSS-1 SS-2 SS-3 SS-4 SS-5 SS-6 SS-7 SG-1 SG-2 SG-3 SG-5Sample DateSample Type UnitsVOCs (TO-15)Acetone24 55 29 76 180 42 28<11 <1121<11 <1129220,000Benzene<0.190.49 J 0.43 J 0.83<0.190.43 J<0.1913 26 17 32 310.66122-Butanone (MEK)3.9 J 8.2 J 4.6 J 11 J 12 J 6.1 J 5.3 J 3.9 J 15 J 3.0 J 3.5 J 4.9 J 4.4 J35,000Carbon Disulfide<1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6220 550 110 470 480<1.64,900Carbon Tetrachloride<0.33 <0.330.40 J<0.33 <0.33 <0.33 <0.33 <0.33 <0.33 <0.33 <0.330.83 J<0.3316Chloroform<0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.242.3<0.241.6<0.24 <0.24 <0.244.1Chloromethane<0.32 <0.32 <0.32 <0.32 <0.32 <0.320.92<0.32 <0.32 <0.32 <0.32 <0.32 <0.32630Cyclohexane<0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.3413<0.3442,000Dichlorodifluoromethane (Freon 12) <0.31 <0.3119<0.31 <0.31 <0.311200<0.31 <0.31 <0.31 <0.31 <0.31 <0.317001,1-Dichloroethane<0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.257.1 7.2<0.2558Ethanol110 330 170 510 90 140 47 26 15 J 15<4.6 <4.6 <4.6NEEthylbenzene2.3 1.1 0.56 J 2.2 1.6 0.76 J<0.18150 170 230 210 20016374-Ethyltoluene<0.30 <0.30 <0.301.9<0.30 <0.30 <0.3062 56 100 120 110 4.9NEHeptane<0.35 <0.35 <0.35 <0.35 <0.35 <0.35 <0.356.8 100 4.8<0.3514<0.352,800Hexane<1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3200<1.351 51<1.34,900Isopropanol5.5 J 16 J 5.0 J 20 J 20<4.5 <4.5 <4.5 <4.5 <4.5 <4.5 <4.5 <4.51,400Methyl tert-butyl ether <0.29 <0.29 <0.29 <0.29 <0.29 <0.29 <0.29 <0.29 <0.292.2<0.29 <0.29 <0.29360Methylene Chloride1.6 J<1.62.6 J<1.6 <1.63.9 J<1.62.0 J<1.6 <1.6 <1.6 <1.6 <1.63,400Naphthalene2.6<0.59152.4 1.8<0.59 <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 <0.592.8Propene<1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.295 760 4.6 J 88 87<1.221,000Styrene<0.24 <0.24 <0.240.75 J<0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.247,000Tetrachloroethylene<0.4411002.5<0.441.3 J 15 3.0 17 12 18 31 30 2.3280Toluene9.4 4.5 2.9 9.4 9.5 3.7 1.9 520 690 700 650 620 2435,0001,1,1-Trichloroethane0.55 J<0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.3635,000Trichloroethylene<0.409.2<0.40 <0.40 <0.40 <0.40 <0.405.2<0.40 <0.40 <0.40 <0.40 <0.4014Trichlorofluoromethane (Freon 11)20 1.4 J 1.4 J 1.2 J 1.2 J 2.0 J 1.3 J 2.7 J 1.7 J 1.0 J 1.2 J<0.85 <0.85NE1,2,4-Trimethylbenzene9.0<0.22 <0.229.4 7.5 2.7<0.22150 130 240 240 230 204201,3,5-Trimethylbenzene1.5 0.77 J<0.261.6 1.3 0.43 J<0.2639 34 65 73 69 4.2420m&p-Xylene11 4.8 2.4 10 7.3 3.3<0.30550 580830700 680 64700o-Xylene4.2 1.9 0.90 3.9 2.9 1.3<0.23190 190 280 240 220 26700Notes:1) North Carolinia Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Residential Vapor Intrusion Soil Gas Screening Levels (SGSLs) dated July 2020Concentrations are reported in micrograms per cubic meter (µg/m3).Compound concentrations are reported to the laboratory method detection limits.Laboratory analytical methods are shown in parentheses. Only compounds detected in at least one sample are shown in the above table.VOCs = volatile organic compounds; NE = Not EstablishedJ = Compound was detected above the laboratory method detction limit, but below the laboratory reporting limit resulting a laboratory estimated concentration.Residential SGSLs (1)µg/m3Proposed Parking Garage Proposed Apartment Building Exterior Soil Gas SG-4 / SG-DUP9/14/2020Sub-Slab9/10/2020S:\AAA‐Master Projects\Akridge\AKR.005 Dunavant Brownfileds Assessment\Report\Tables\Data Tables.xlsx10/1/2020Table 4 (Page 1 of 1)Hart & Hickman, PC
#
#
#
#
#
"¬
"¬
"D
"D
"D
"GÑ
"GÑ
"GÑ
!
!
!!Ñ!!
#
"¬#
SS-1
SS-2
SS-3
SS-4
SS-5
SG-2
SG-4
SG-1/SB-2
SG-5/SB-5
SG-5/SB-7
TMW-1/SB-1
TMW-3/SB-6
TMW-4/SB-8
SB-3
SB-4
SB-9 SB-10 TMW-2
SS-7
SG-3
SS-6
726
710726
730
724
72 2
728
712
7 2 6
724
7 2 2
714 718716
720
SAMPLE LOCATION MAP
CRAYTON PRINTINGDISTRIBUTION STREET AND DUNAVANT STREETCHARLOTTE, NORTH CAROLINA
REVISION NO: 0
FIGURE NO: 4
2923 South Tryon Street - Suite 100Charlotte, North Carolina 28203704-586-0007 (p) 704-586-0373 (f)License # C-1269 / # C-245 Geology
0 50 100
SCALE IN FEET
N
DATE: 9-28-20
JOB NO. AKR-005
DUNAVANT STREET
DISTRIBUTION STREETNOTE:
1. BASE DATA OBTAINED FROM MECKLENBURG COUNTY GIS, 2020.
2. ELEVATION DATA OBTAINED FROM MECKLENBURG COUNTY LIDAR, 2013.Path: \\HHFS01\Redirectedfolders\sperry\My Documents\ArcGIS\PROJECTS\AKR-005\FIGURE 4 - Sample Location Map.mxdHAWKINS STREETPROPOSEDCOURTYARD
PROPOSEDPARKING DECK
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
PARCEL BOUNDARY LINE
ELEVATION CONTOUR
!SOIL BORING
"¬SOIL GAS SAMPLE
"D CO-LOCATED SOIL GAS SAMPLE AND SOILBORING
#SUB-SLAB SOIL VAPOR SAMPLE
Ñ!!TEMPORARY MONITORING WELL
"GÑ CO-LOCATED TEMPORARY MONITORING WELLAND SOIL BORING
PROPOSED BUILDING FOOTPRINT
PROPOSED PARKING DECK
PROPOSED RESIDENTIAL
PROPOSED SERVICE OR AMENITY
"GÑ
"GÑ
"GÑ
Ñ!!
TMW-1/SB-1
TMW-3/SB-6
TMW-4/SB-8
TMW-2
726
710726
730
724
72 2
728
712
7 2 6
724
7 22
714 718716
720
SHALLOW GROUNDWATERPOTENTIOMETRIC MAP
CRAYTON PRINTINGDISTRIBUTION STREET AND DUNAVANT STREETCHARLOTTE, NORTH CAROLINA
REVISION NO: 0
FIGURE NO: 5
2923 South Tryon Street - Suite 100Charlotte, North Carolina 28203704-586-0007 (p) 704-586-0373 (f)License # C-1269 / # C-245 Geology
0 50 100
SCALE IN FEET
N
DATE: 9-28-20
JOB NO. AKR-005
DUNAVANT STREET
DISTRIBUTION STREETNOTE:
1. BASE DATA OBTAINED FROM MECKLENBURG COUNTY GIS, 2020.
2. ELEVATION DATA OBTAINED FROM MECKLENBURG COUNTY LIDAR, 2013.Path: \\HHFS01\Redirectedfolders\sperry\My Documents\ArcGIS\PROJECTS\AKR-005\FIGURE 5 - GW Gradient Map.mxdHAWKINS STREETPROPOSEDCOURTYARD
PROPOSEDPARKING DECK
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
PARCEL BOUNDARY LINE
ELEVATION CONTOUR
Ñ!!TEMPORARY MONITORING WELL
"GÑ CO-LOCATED TEMPORARY MONITORINGWELL AND SOIL BORING
PROPOSED BUILDING FOOTPRINT
PROPOSED PARKING DECK
PROPOSED RESIDENTIAL
PROPOSED SERVICE OR
GROUNDWATER ELEVATION (FT.)
INFERRED GROUNDWATER CONTOUR (FT.)
INFERRED DIRECTION OF GROUNDWATERFLOW9092
94969 4
100
(100.32)
(90.79)
(93.94)
(90.11)
(100.32)100
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
Site Wide Soil Gas - Hypothetical Worst Case
North Carolina Department of Environmental Quality
Risk Calculator
Crayton Printing
Dunavant Street and Distribution Street
Division of Waste Management - Brownfields Program
24025-20-060
July 2020
May 2020 EPA RSL Table
Prepared By:Haley Martin, PG
Matt Bramblett, PE
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: 24025-20-060
Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst Case
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: 24025-20-060
Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst Case
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: July 2020Basis: May 2020 EPA RSL TableSite ID: 24025-20-060Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst CaseDescription of Exposure Point Concentration Selection:Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.Exposure Point Concentration (ug/m3)Notes: CAS Number ChemicalMinimum Concentration (Qualifier)Maximum Concentration (Qualifier)UnitsLocation of Maximum ConcentrationDetection FrequencyRange of Detection LimitsConcentration Used for ScreeningBackground ValueScreening Toxicity Value (Screening Level) (n/c)Potential ARAR/TBC ValuePotential ARAR/TBC SourceCOPC Flag (Y/N)Rationale for Selection or Deletion180 67-64-1 Acetoneug/m332 71-43-2 Benzeneug/m3550 75-15-0 Carbon Disulfideug/m30.83 56-23-5 Carbon Tetrachlorideug/m32.3 67-66-3 Chloroformug/m30.92 74-87-3 Chloromethaneug/m313 110-82-7 Cyclohexaneug/m31200 75-71-8 Dichlorodifluoromethaneug/m37.2 75-34-3 Dichloroethane, 1,1-ug/m3230 100-41-4 Ethylbenzeneug/m3100 142-82-5 Heptane, N-ug/m3200 110-54-3 Hexane, N-ug/m320 67-63-0 Isopropanolug/m315 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m32.2 1634-04-4 Methyl tert-Butyl Ether (MTBE)ug/m33.9 75-09-2 Methylene Chlorideug/m315 91-20-3 ~Naphthaleneug/m3760 115-07-1 Propyleneug/m30.75 100-42-5 Styreneug/m31100 127-18-4 Tetrachloroethyleneug/m3700 108-88-3 Tolueneug/m30.55 71-55-6 Trichloroethane, 1,1,1-ug/m39.2 79-01-6 Trichloroethyleneug/m3240 95-63-6 Trimethylbenzene, 1,2,4-ug/m373 108-67-8 Trimethylbenzene, 1,3,5-ug/m31110 1330-20-7 Xylenesug/m3Input Form 2DSoil Gas Exposure Point Concentration TableNorth Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: 24025-20-060
Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst Case
Receptor Pathway
Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use* NC NC NC
Soil NC NC NC
Groundwater Use* NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water* NC NC NC
Receptor Pathway
Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.9E-05 2.0E+00 YES
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not complete
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: 24025-20-060
Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst Case
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated
Non-Carcinogenic Hazard Quotient
67-64-1 Acetone 180 5.4 - 6.5E+03 1.7E-04
71-43-2 Benzene 32 0.96 3.6E-01 6.3E+00 2.7E-06 3.1E-02
75-15-0 Carbon Disulfide 550 16.5 - 1.5E+02 2.3E-02
56-23-5 Carbon Tetrachloride 0.83 0.0249 4.7E-01 2.1E+01 5.3E-08 2.4E-0467-66-3 Chloroform 2.3 0.069 1.2E-01 2.0E+01 5.7E-07 6.8E-0474-87-3 Chloromethane 0.92 0.0276 - 1.9E+01 2.9E-04
110-82-7 Cyclohexane 13 0.39 - 1.3E+03 6.2E-05
75-71-8 Dichlorodifluoromethane 1200 36 - 2.1E+01 3.5E-01
75-34-3 Dichloroethane, 1,1- 7.2 0.216 1.8E+00 - 1.2E-07
100-41-4 Ethylbenzene 230 6.9 1.1E+00 2.1E+02 6.1E-06 6.6E-03
142-82-5 Heptane, N- 100 3 - 8.3E+01 7.2E-03
110-54-3 Hexane, N- 200 6 - 1.5E+02 8.2E-0367-63-0 Isopropanol 20 0.6 - 4.2E+01 2.9E-03
78-93-3 Methyl Ethyl Ketone (2-Butanone) 15 0.45 - 1.0E+03 8.6E-05
1634-04-4 Methyl tert-Butyl Ether (MTBE) 2.2 0.066 1.1E+01 6.3E+02 6.1E-09 2.1E-05
75-09-2 Methylene Chloride 3.9 0.117 1.0E+02 1.3E+02 1.2E-09 1.9E-04
91-20-3 ~Naphthalene 15 0.45 8.3E-02 6.3E-01 5.4E-06 1.4E-01
115-07-1 Propylene 760 22.8 - 6.3E+02 7.3E-03
100-42-5 Styrene 0.75 0.0225 - 2.1E+02 2.2E-05127-18-4 Tetrachloroethylene 1100 33 1.1E+01 8.3E+00 3.1E-06 7.9E-01108-88-3 Toluene 700 21 - 1.0E+03 4.0E-03
71-55-6 Trichloroethane, 1,1,1- 0.55 0.0165 - 1.0E+03 3.2E-06
79-01-6 Trichloroethylene 9.2 0.276 4.8E-01 4.2E-01 5.8E-07 1.3E-01
95-63-6 Trimethylbenzene, 1,2,4- 240 7.2 - 1.3E+01 1.2E-01
108-67-8 Trimethylbenzene, 1,3,5- 73 2.19 - 1.3E+01 3.5E-02
1330-20-7 Xylenes 1110 33.3 - 2.1E+01 3.2E-01
Cumulative: 1.9E-05 2.0E+00
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator