24051_Dilworth Auto_VIMP Modification Request _20220425

Via Email
April 25, 2022
NCDEQ – Division of Waste Management
Brownfields Program 1646 Mail Service Center Raleigh, NC 27699-1646
Attn: Mr. Bill Schmithorst
Re: VIMP Modification Request Dilworth Auto Brownfields Property
Ascent Southend Development
South Boulevard & East Kingston Avenue Charlotte, Mecklenburg County, North Carolina Brownfields Project No. 24051-20-060 H&H Project No. WPP-011

Dear Bill:
On behalf of White Point Partners, LLC and Greystar, Hart & Hickman, PC (H&H) has prepared
this vapor intrusion mitigation plan (VIMP) modifications request letter for the Dilworth Auto
Service Brownfields property located at 120 E. Kingston Avenue; 1700, 1708, 1714, 1720, and
1728 South Boulevard; and 101, 105, and 115 East Boulevard in Charlotte, Mecklenburg County,
North Carolina (Site). The Site is part of the North Carolina Department of Environmental Quality
(DEQ) Brownfields Program (Brownfields No. 24051-20-060). The development is known as
Ascent Southend and consists of one high-rise building with retail and amenity spaces on the
ground floor, a parking deck located above the ground floor, and multi-family residences located
above the parking deck. The Site is being developed by Greystar.

On February 2, 2022, the DEQ Brownfields Program provided approval for the Vapor Intrusion
Mitigation Plan – Revision 1 dated January 12, 2022 related to installation of a passive vapor
intrusion mitigation system (VIMS) during construction of the Site building.
Mr. Bill Schmithorst April 25, 2022
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https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/White Point Partners (WPP)/WPP-011 Dilworth Auto Service/VIMP/VIMP Mod - Rev 2 drawings/24051_Dilworth Auto_VIMS Mod Request _042522.docx
After DEQ provided approval of the VIMP, the ground floor design of the building was slightly
modified by the developer. The proposed modifications to the VIMP are depicted on the VIMS
Design Drawings – Revision 2, dated April 19, 2022, and included in Attachment A. A brief
summary of the modifications are also listed below.

1. The ground floor layout of the building was modified to include an open-air non-
conditioned vehicle drive-through area on the western portion of the building that runs
through the entire building between Retail Space #2 (Retail 2) and Retail Space #3 (Retail
3). In the DEQ-approved VIMP, this area included a trash hangar and proposed enclosed
retail spaces. With the addition of the open-air drive-through, Retail 2 was reduced in size.
As such, the revised VIMS drawings include a reduction in vent pipe and vapor barrier
based on the new layout. As the drive-through is open-air and not enclosed, VIMS controls
below the drive-through are not warranted. The proposed riser (E-B1) location, size,
exhaust plan, and pipe material in Retail 2 will remain the same as in the approved VIMP.
In addition, the same number of monitoring points will remain as in the approved VIMP,
but temporary monitoring point TMP-B2 will be shifted to remain within the Retail 2 space.

2. The stairwell on the north side of Retail 3 changed slightly to include a recessed entryway
(doorway) to the stairwell. As such, minor changes to the sub-slab vent piping were made
to accommodate this recessed entryway. One monitoring point (MP-C3) will remain in
this stairwell as proposed in the approved VIMP.

3. The builder is planning to apply a 60-mil self-adhering waterproofing membrane (e.g.
Carlisle MiraDri 860) on the outside of the exterior footers. This waterproofing membrane
has a permeance lower than 0.1 perms which is considered the highest class of vapor
retarder (i.e. vapor barrier) per American Society of Testing and Materials ASTM
specifications. The approved VIMP indicates that vapor barrier would extend, where
possible, close to finished grade, but the exterior waterproofing wasn’t specified in the
VIMP. The application of the waterproofing membrane along the outside of the exterior
footers will make the vapor barrier unnecessary (Detail 11/VM-2) in most areas.
Therefore, in areas where the exterior grade remains lower than the interior slab elevation,
Mr. Bill Schmithorst April 25, 2022
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https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/White Point Partners (WPP)/WPP-011 Dilworth Auto Service/VIMP/VIMP Mod - Rev 2 drawings/24051_Dilworth Auto_VIMS Mod Request _042522.docx
the modification includes installation of the waterproofing only on the outside of the
exterior footer, as vapor intrusion into the buildings is unlikely to occur in these areas due
to the grade elevations, and the waterproofing material still acts as a vapor retarder.
However, as an additional precaution, in areas where the final grade soils will extend higher
than the slab elevation of interior spaces (Detail 12/VM-2) that cause soil to be placed
adjacent to exterior walls, the vapor barrier specified in the VIMP will be installed along
the exterior footer along with the proposed waterproofing. The details were slightly
modified to incorporate these scenarios.

The proposed VIMP modifications detailed herein will allow for coordination of the VIMS
installation with the revised building plans and provide more information for the installation
contractors. These modifications are intended to supplement the DEQ-approved VIMP and so the
provisions in the VIMP (e.g. inspections, influence testing, sampling etc.) not referenced above
will continue to apply.

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

Mr. Bill Schmithorst April 25, 2022
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https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/White Point Partners (WPP)/WPP-011 Dilworth Auto Service/VIMP/VIMP Mod - Rev 2 drawings/24051_Dilworth Auto_VIMS Mod Request _042522.docx
The VIMS detailed herein is designed to mitigate intrusion of subsurface vapors into the subject
building from known Brownfields Property contaminants in a manner that is in accordance with
the most recent and applicable guidelines including, but not limited to, DWM Vapor Intrusion
Guidance, Interstate Technology & Regulatory Council (ITRC) guidance, and American National
Standards Institute (ANSI)/American Association of Radon Scientists and Technologists
(AARST) standards. The sealing professional engineer below is satisfied that the design is fully
protective of public health from known Brownfields Property contaminants.

We appreciate your prompt review and approval of the proposed modifications to the VIMS
design. If you have any questions or require additional information, please do not hesitate to
contact me at 704-586-0007.
Sincerely,
Hart & Hickman, PC

Trinh DeSa, PE Senior Project Engineer
cc: Mr. Bo Cappleman (H&H)
Attachment 1:
VIMS Design Drawings - VM-1, VM-1A, VM-2, and VM-3 (Revision 2 - dated April 19, 2022)

Attachment 1
VIMS Design Drawings - VM-1, VM-1A, VM-2, and VM-3
(Revision 2 - dated April 19, 2022)

UP
DN
DNDNDN
UP
UP
TV
18"
18"18"18"18"18"18"18"18"18"18"
18"18"18"18"18"18"18"18"
18"
18"
18"
18"18"18"18"64"
64"
LOW HEAD ROOM
APP. 12' TO BOTTOM OF SLAB
ABOVE
116
127
145
121
132
143
152
102
163
103
154
137
147 148
139
117
158
169
109
130
160
170
161
165 166 167
104
114
125
105
115
126124
110
171
119
157
144
112
118
159
123
133
134
100
122
153
149
106
128
140
P1
P1
150
113
120
131
141
151
107
136 172 173
138
162
142
168
135
164
108
146
MP-C1
MP-C2
MP-A1
MP-2
MP-B1
MP-3
TMP-B2 TMP-A2
TMP-1
TMP-3
TMP-C4
MP-4
MP-5
MP-6
MP-8
MP-7
MP-C3
MP-1E-C1
E-2
E-A1
E-1
E-3
E-B1
E-C2
H&H NO. WPP-011
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
VAPOR INTRUSION
MITIGATION SYSTEM
PLAN VIEW LAYOUT
LEVEL 1ASCENT SOUTH ENDSOUTH BOULEVARD & EAST KINGSTONCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24051-20-060VM-1
PROFESSIONAL
APPROVAL
REVISIONS
REV DATE DESCRIPTION
0 11/01/21 DEQ SUBMISSION
1 01/12/22 DEQ SUBMISSION REV 1
2 04/19/22 DEQ SUBMISSION REV 2
LEGEND
SLAB GRADE CHANGE
THICKENED SLAB OR FOOTER - SEE STRUCTURAL PLANS
COLUMN AND FOOTING
OUTDOOR OR OPEN AIR SPACE
EXTENT OF 8" SLAB - SEE STRUCTURAL PLANS
EXTENT OF VAPOR LINER
HORIZONTAL COLLECTION PIPING OR SOIL GAS COLLECTOR MAT
3" DIA SCH 40 SOLID PVC PIPE
4" DIA METAL VERTICAL RISER WITH EXHAUST IDENTIFICATION NUMBER
2" DIA SOLID PVC PRESSURE MONITORING POINT WITH FLUSH-MOUNTED COVER
(POSITION INTAKE MINIMUM 5-FT FROM EXTERIOR FOOTING)
TEMPORARY MONITORING POINT (SEE DETAIL 28 AND SPECIFICATION #7)
(POSITION INTAKE MINIMUM 5-FT FROM EXTERIOR FOOTING)
MP-1
DEVELOPER:
GREYSTAR
1545 PEACHTREE STREET NE
ATLANTA, GEORGIA
1
VM-2
90-DEGREE
ELBOW, TYP
PVC TEE
FITTING, TYP
E-2
27
VM-2A
2
VM-2
9
VM-2
7
VM-2
14
VM-2
14
VM-2
15
VM-2
22
VM-2A
24
VM-2A
3/27
VM-2/2A
24
VM-2A
17
VM-2A
18
VM-2A
4/27
VM-2/2A
3/27
VM-2/2A
4/27
VM-2/2A
3/27
VM-2/2A
3/27
VM-2/2A
6B
VM-2
11
VM-2
8
VM-2
7
VM-2
7
VM-2
11
VM-2
11
VM-2
DATE: 4-19-22
14
VM-2
11
VM-2
13
VM-2
20
VM-2A
20
VM-2A
PVC TEE
FITTING, TYP
90-DEGREE
ELBOW, TYP
2
VM-2
26
VM-2A
1
VM-2
PVC TEE
FITTING, TYP
04/19/22
TMP-A2
28
VM-2A
28
VM-2A
24
VM-2A
24
VM-2A
29
VM-2A
14
VM-2
6A
VM-2
14
VM-2
6A
VM-2
6B
VM-26B
VM-2
3/27
VM-2/2A
PVC END
CAP, TYP
CONNECTOR PIPE
THROUGH STAIR FOOTER,
IF FOOTER PRESENT
TERMINATE VAPOR LINER
AT EXTERIOR FOOTER AT
RECESSED DOORWAY
2
2
RETAIL 1RETAIL 2RETAIL 3
S:\AAA-Master Projects\White Point Partners (WPP)\WPP-011 Dilworth Auto Service\VIMP\Figures\VIMP Design_R2.dwg, 4/19/2022 3:08:38 PM, DWG To PDF.pc3
TV
18"
18"18"18"18"18"18"18"18"18"18"
18"18"18"18"18"18"18"18"
18"
18"
18"
18"18"18"18"64"
64"
116
127
145
121
132
143
152
102
163
103
154
137
147 148
139
117
158
169
109
130
160
170
161
165 166 167
104
114
125
105
115
126124
110
171
119
157
144
112
118
159
123
133
134
100
122
153
149
106
128
140
P1
P1
150
113
120
131
141
151
107
136 172 173
138
162
142
168
135
164
108
146
E-C1
E-2
E-A1
E-1
E-3
E-B1
E-C2
H&H NO. WPP-011
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
VAPOR INTRUSION
MITIGATION SYSTEM
PLAN VIEW LAYOUT
LEVEL 3 - 4ASCENT SOUTH ENDSOUTH BOULEVARD & EAST KINGSTONCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24051-20-060VM-1A
PROFESSIONAL
APPROVAL
LEGEND
4" DIA SOLID METAL PIPE - CEILING SUPPORTED IN LEVEL 1 OR 2
4" DIA SOLID METAL PIPE - FLOOR SUPPORTED IN LEVEL 2 OR 3
4" DIA METAL VERTICAL RISER WITH EXHAUST IDENTIFICATION NUMBER
NON-PUBLIC AREA WITH NO PARKING
DEVELOPER:
GREYSTAR
1545 PEACHTREE STREET NE
ATLANTA, GEORGIA
16
VM-2
E-2
POSITION DISCHARGE ON LEVEL 3
MINIMUM 10' FROM AIR INTAKE OR
AREA WITH PUBLIC ACCESS
POSITION DISCHARGE ON
LEVEL 3 MINIMUM 10' FROM AIR
INTAKE OR AREA WITH PUBLIC
ACCESS
POSITION DISCHARGE ON LEVEL 3
MINIMUM 10' FROM AIR INTAKE OR
AREA WITH PUBLIC ACCESS
POSITION DISCHARGE ON
LEVEL 3 MINIMUM 10' FROM AIR
INTAKE OR AREA WITH PUBLIC
ACCESS
27
VM-2A
27
VM-2A
INSTALL ELECTRICAL OUTLETS WITHIN
5' OF RISER ON LEVEL 4 FOR
POTENTIAL FUTURE ELECTRIC FAN
INSTALL ELECTRICAL OUTLET WITHIN
5' OF RISER ON LEVEL 3 FOR
POTENTIAL FUTURE ELECTRIC FAN
INSTALL ELECTRICAL OUTLET WITHIN
5' OF RISER ON LEVEL 3 FOR
POTENTIAL FUTURE ELECTRIC FAN
INSTALL ELECTRICAL OUTLET WITHIN
5' OF RISER ON LEVEL 3 FOR
POTENTIAL FUTURE ELECTRIC FAN
PIPE INSTALLED ALONG
CEILING OF LEVEL 3
PIPE INSTALLED ALONG
CEILING OF LEVEL 2
PIPE INSTALLED ALONG
CEILING OF LEVEL 2
PIPE INSTALLED ALONG
CEILING OF LEVEL 2
PIPE INSTALLED ALONG
CEILING OF LEVEL 3
LONG RADIUS 90-DEGREE
ELBOW, TYP.
45-DEGREE ELBOW, TYP.
45-DEGREE
ELBOW, TYP.
DATE: 4-19-22
16
VM-2
16
VM-2
16
VM-2
04/19/22
45-DEGREE ELBOW, TYP.
REVISIONS
REV DATE DESCRIPTION
0 11/01/21 DEQ SUBMISSION
1 01/12/22 DEQ SUBMISSION REV 1
2 04/19/22 DEQ SUBMISSION REV 2
POSITION PIPE PENETRATION
THROUGH LEVEL 3 MINIMUM
2-FT FROM TRANSFER GIRDER
LONG RADIUS 90-DEGREE
ELBOW, TYP.
LONG RADIUS 90-DEGREE
ELBOW, TYP.
AVOID SHEAR RAILS FOR
PIPE PENETRATION. SEE
STRUCTURAL DRAWINGS.
16
VM-2
45-DEGREE
ELBOW, TYP.S:\AAA-Master Projects\White Point Partners (WPP)\WPP-011 Dilworth Auto Service\VIMP\Figures\VIMP Design_R2.dwg, 4/19/2022 2:32:00 PM, DWG To PDF.pc3
BASE COURSE - CLEAN #57 STONE
MIN 5" THICK BENEATH VAPOR BARRIER (SEE
SPECIFICATION #2 & #3)
VAPOR BARRIER (SEE SPECIFICATION #2)
CONCRETE FLOOR SLAB
SUBBASE
VAPOR BARRIER AND BASE COURSE (TYPICAL)1
NTSVM-2
3" SCH 40 THREADED FLUSH JOINT
SLOTTED PVC PIPE SET WITHIN MIN 5"
BASE COURSE (SEE SPECIFICATION #3)
VAPOR BARRIER (SEE SPECIFICATION #2)
SUBBASE
CONCRETE FLOOR SLAB
SLOTTED COLLECTION PIPE (TYPICAL)2
NTSVM-2
PVC ENDCAP - DRILL
APPROX. 3 - 1/4" HOLES
VIMS AT VERTICAL RISERS WITH 90 DEGREE ELBOW (TYP)
NTS
3
VM-2
BASE COURSE
SUB-BASE
SLOTTED 3" SCH 40 PVC
VAPOR LINER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
VAPOR LINER
4" DIA METAL RISER DUCT PIPE
(SEE SPECIFICATION #4, #5 & #6)
WALL OR COLUMN (VARIES)
4" SCH 40 PVC
90-DEGREE ELBOW4" TO 3" SCH 40
PVC REDUCER
AIR-TIGHT 4" DIA PVC TO METAL
TRANSITION COUPLING
SUPPORT PIPE AS NECESSARY
CONCRETE
FLOOR SLAB
BASE COURSE
SUB-BASE
VIMS PIPING THROUGH THICKENED SLAB (TYP)
NTS
7
VM-2
SOLID 3"
SCH 40 PVC
VAPOR LINER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
PROVIDE PIPE SUPPORT TO PREVENT
LOW POINT IN SOLID PIPE. MAINTAIN 1%
SLOPE TOWARD SLOTTED SECTION OF
PIPE (SEE SPECIFICATION #2)
VAPOR LINER
SOLID TO SLOTTED 3" SCH 40
PVC PIPE TRANSITION (SLIP
COUPLING OR THREADED JOINT)
VAPOR LINER BENEATH
GRADE BEAM
WALL (VARIES)
PIPE SLEEVE
3" SCH 40 PVC PIPE
(IF PRESENT)
VIMS AT SLAB THICKENING WITH PIPE (TYP)
NTS
10
VM-2
BASE COURSE
WALL (VARIES)
SUBBASE
VAPOR LINER
3" SCH 40 PVC
45-DEGREE ELBOW
3" SCH 40 SLOTTED PVC PIPE
VIMS AT VERTICAL RISER (OPTIONAL SUB-SLAB COLLECTION PIPE)
NTS
5
VM-2
BRICK OR HOUSE SIDING
EXTERNAL WALL (NOT PRESENT
AT ALL LOCATIONS)
STUD WALL
VAPOR LINER SEALED TO PIPE
AND CONCRETE PER
MANUFACTURER INSTRUCTIONS.
4" DIA METAL RISER DUCT PIPE
(SEE SPECIFICATION #4, #5 & #6)
4" SCH 40 PVC RISER DUCT PIPE
BASE COURSE
SOIL GAS
COLLECTOR MAT
SUBBASE
SOIL GAS COLLECTOR MAT CONNECTION SEALED TO 4" SCH 40
PVC RISER WITH POLYURETHANE SEALANT
SOIL GAS COLLECTOR MAT CONNECTION BLOCK TO PVC (ONE 0.5"
DIAMETER HOLE DRILLED IN BOTTOM FOR MOISTURE DRAINAGE)
4" DIA PVC TO METAL
TRANSITION COUPLING
VIMS VAPOR LINER AT INTERIOR THICKENED SLAB (TYP)
NTS
6A
VM-2
CONCRETE
FLOOR SLAB
BASE COURSE
VAPOR LINER
SUB-BASE
WALL (VARIES)
SLP.
VIMS AT RAMP (TYP)
NTS
13
VM-2
VAPOR LINERCONCRETE FLOOR SLAB
SUB-BASE
SLOTTED 3" SCH 40
PIPE (IF PRESENT)BASE COURSE
VAPOR BARRIER
BENEATH THICKENED SLAB
VAPOR BARRIER AT STAIR THICKENED SLAB8
NTS
STAIR STRINGER
SUBBASE
BASE COURSE
VM-2
CONCRETE FLOOR
SLABVAPOR LINER
OPEN AIR SPACE
OCCUPIED SPACE
VIMS AT PARKING DECK RAMP ADJACENT TO OCCUPIED SPACE (TYP)
NTS
15
VM-2
SUB-BASE
BASE COURSE
VAPOR LINER
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING MEMBRANE (WHERE
PRESENT) PER MANUFACTURER INSTRUCTIONS
(SEE DETAIL 22/VM-2A)
WATERPROOFING AND RIGID
INSULATION (IF PRESENT)
DRAIN, IF
PRESENT
CONCRETE
RAMP SLAB
SLP.
SLP.
VIMS AT EXTERIOR FOOTING (TYP)
NTSVM-2
11
CONCRETE FLOOR SLAB
VAPOR LINER SEALED TO CONCRETE
PER MANUFACTURERS INSTRUCTIONS
VAPOR LINER
BASE COURSE
SUB-BASE
WALL (VARIES)
EXTERIOR GRADE
(VARIES)
WATERPROOFING MEMBRANE ON
EXTERIOR OF FOOTER IN LIEU OF
VAPOR BARRIER WHERE
APPLICABLE
IF WATERPROOFING IS NOT PRESENT OR FINAL
GRADE SOILS ARE HIGHER THAN INTERIOR
SLAB ELEVATION, THEN VAPOR LINER MUST
EXTEND ALONG EXTERIOR FOOTER
INTERIOR
VIMS AT EXTERIOR FOOTING WITH CURB (TYP)
NTSVM-2
12
CONCRETE FLOOR SLAB
VAPOR LINER SEALED TO CONCRETE
PER MANUFACTURERS INSTRUCTIONS
VAPOR LINER
BASE COURSE
SUB-BASE
CONCRETE CURB
VAPOR LINER EXTENDED TO EXTERIOR SIDE OF
FOOTER, IF POSSIBLE, BASED ON CONSTRUCTION
SEQUENCE. ENGINEER WILL APPROVE FINAL VAPOR
LINER TERMINATION POINT DURING CONSTRUCTION
EXTERIOR GRADE
(VARIES)
4" DIA METAL PIPE (VARIES)
PIPE HANGER
SUPPORT TO CEILING
PIPE SUPPORT
(SPLIT-RING HANGER, OR SIMILAR)
PIPE SUPPORT IN GARAGE (TYP)16
NTSVM-2
AIR-TIGHT COUPLINGS REQUIRED
FOR PIPE CONNECTIONS DURING
EXPOSED-PIPE LENGTHS
VIMS AT DEPRESSIONS IN SLAB-ON-GRADE (TYP)
NTS
9
VM-2
BASE COURSE
VAPOR LINER
WALL (VARIES)
SUBBASE
VIMS AT VERTICAL RISERS WITH SLAB THICKENING (TYP)
NTS
4
VM-2
BASE COURSE
SUBBASESOLID TO PERFORATED 3" SCH
40 PVC PIPE TRANSITION (SLIP
COUPLING OR THREADED JOINT)
VAPOR LINER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
4" SCH 40 PVC 90
DEGREE ELBOW
PIPE SLEEVE
(SEE SPECIFICATION #12)
4" TO 3" SCH 40
PVC REDUCER
WALL (VARIES)
4" DIA METAL RISER DUCT PIPE
(SEE SPECIFICATION #4, #5 & #6)
AIR-TIGHT 4" DIA PVC TO METAL TRANSITION COUPLING
SUPPORT PIPE AS NECESSARY
REFER TO STRUCTURAL
DRAWINGS FOR ACCEPTABLE
SLAB PENETRATION LOCATIONS
VIMS VAPOR LINER AT TRANSITION TO OPEN-AIR DRIVE THROUGH
NTS
14
VM-2
VAPOR LINER WALL (VARIES)
OPEN AIR / DRIVE
THROUGH
OCCUPIED SPACE
MOISTURE BARRIER, IF
PRESENT, BY OTHERS.
VAPOR LINER SEALED TO CONCRETE PER
MANUFACTURERS INSTRUCTIONS (TYP)
VIMS VAPOR LINER AT INTERIOR NON-LOAD BEARING WALL
NTS
6B
VM-2
8" CONCRETE FLOOR SLAB
(SEE STRUCTURAL PLANS)
BASE COURSE
VAPOR LINER
SUB-BASE
NON-LOADING BEARING
WALL (VARIES)
H&H NO. WPP-011
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
VAPOR INTRUSION
MITIGATION SYSTEM
CROSS-SECTION
DETAILS #1-16
VM-2
NOTES:
VIMS = VAPOR INTRUSION MITIGATION SYSTEM
TYP = TYPICAL
SCH = SCHEDULE
PVC = POLYVINYL CHLORIDE
NTS = NOT TO SCALE
ALL PIPE MEASUREMENTS ARE BY DIAMETER
PROFESSIONAL
APPROVALASCENT SOUTH ENDSOUTH BOULEVARD & EAST KINGSTONCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24051-20-060DEVELOPER:
GREYSTAR
1545 PEACHTREE STREET NE
ATLANTA, GEORGIA
DATE: 4-19-22
04/19/22
REVISIONS
REV DATE DESCRIPTION
0 11/01/21 DEQ SUBMISSION
1 01/12/22 DEQ SUBMISSION REV 1
2 04/19/22 DEQ SUBMISSION REV 2
2
2
S:\AAA-Master Projects\White Point Partners (WPP)\WPP-011 Dilworth Auto Service\VIMP\Figures\VIMP Design_R2.dwg, 4/19/2022 2:37:10 PM, DWG To PDF.pc3
FINISHED FLOOR SLAB
2" SCH 40 PVC SET WITHIN GRAVEL LAYER
(SEE DETAIL 14 & 15)
2" DRAIN EXPANSION TEST PLUG
VIMS MONITORING POINT - TYPICAL DETAIL VIEW
NTS
23
VM-2A
VAPOR BARRIER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
2" SCH 40 PVC 90 DEGREE ELBOW
FLOOR CLEANOUT, ADJUSTABLE, 4" DIA ZURN
INDUSTRIES MODEL #CO2450-PV4 (OR ENGINEER
APPROVED EQUIVALENT) FLUSH WITH FINISHED FLOOR
BASE COURSE
4" x 2" FLUSH REDUCER
BUSHING
OPEN-ENDED PIPE
OPEN AIR SPACE
OCCUPIED SPACE
VIMS AT RETAINING WALL ADJACENT TO OCCUPIED SPACE (TYP)
NTS
22
VM-2A
SUB-BASE
BASE COURSE
VAPOR LINER
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING MEMBRANE (WHERE
PRESENT) PER MANUFACTURER INSTRUCTIONS
(SEE DETAIL 21/VM-2A)
WATERPROOFING AND RIGID
INSULATION (IF PRESENT -
REFER TO ARCH. PLANS)
DRAIN
WALL (VARIES)
CONCRETE
FLOOR SLAB
20
NTSVM-2A
VIMS AT ELEVATOR PIT (TYP)
CONTINUOUS VAPOR LINER
SEALED PER MANUFACTURER
INSTRUCTIONS
SUMP PIT
SUB-BASE
BASE COURSE
VAPOR LINER
WATERPROOFING MEMBRANE
(IF PRESENT - REFER TO ARCH. PLANS)
(SEE SPECIFICATION #13)
SEE DETAIL 21/VM-2A
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING MEMBRANE (WHERE
PRESENT) PER MANUFACTURER INSTRUCTIONS
(SEE DETAIL 21/VM-2A)
BASE COURSE
FLOOR CLEANOUT, ADJUSTABLE,
4" DIA ZURN INDUSTRIES
MODEL #CO2450-PV4 (OR ENGINEER
APPROVED EQUIVALENT)
SEE DETAIL 25/VM-2A
FLUSH WITH
FINISHED FLOOR
24
NTSVM-2A
VIMS MONITORING POINT WITH EXTENDED INTAKE PIPE
VAPOR LINER
2" SOLID SCH 40 PVC
LENGTH VARIES - REFER
TO SHEET VM-1
2" SCH 40 PVC 90-DEGREE
ELBOW VAPOR LINER PENETRATION
SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
WALL (VARIES)
OPEN-ENDED PIPE
LEVEL 3
LEVEL 2
VIMS EXHAUST AT PLANTER (TYPICAL)27
NTSVM-2A
4" DIA 90-DEGREE METAL
FLANGED ELBOW FLUSH MOUNTED
OPEN-ENDED PIPE
CONCRETE PLANTER
CONCRETE PARKING DECK
PIPE SUPPORT
PER CODE
ELECTRICAL JUNCTION BOX
4" DIA METAL PIPE WITHIN PIPE
SLEEVE PER STRUCTURAL PLANS
4" DIA METAL PIPE WITHIN PIPE
SLEEVE PER STRUCTURAL PLANS
INSTALL FLANGE OR RUBBER COUPLING FOR
POTENTIAL FUTURE ELECTRIC FAN
INSTALLATION IF WARRANTED
21
VM-2A
SOIL SUB-BASE
VAPOR LINER
DRAINAGE MAT
(IF PRESENT)
CONCRETE
NTS
VIMS AT ELEVATOR PIT - WATERPROOFING DETAIL (TYP)
WATERPROOFING MEMBRANE
(IF PRESENT - REFER TO ARCH. PLANS)
(SEE SPECIFICATION #13)
VIMS AT EXTERIOR COLUMN (TYP)
NTS
18
VM-2A
SUB-BASE
CONCRETE
FLOOR SLAB
BASE COURSE
VAPOR LINER
CIP CONCRETE COLUMN
VAPOR LINER SEALED
TO CONCRETE PER
MANUFACTURERS
INSTRUCTIONS
SEE DETAIL 19/VM-2ACOLUMN BLOCKOUT
VAPOR LINER SEALED
TO CONCRETE ON
EACH SIDE OF COLUMN
VIMS AT INTERIOR COLUMN (TYP)
NTS
17
VM-2A
SUB-BASE
CONCRETE FLOOR SLAB
BASE COURSE
VAPOR LINER
CIP CONCRETE COLUMN
CONCRETE FOOTING
VAPOR LINER SEALED OUTSIDE OF
CONCRETE COLUMN PER
MANUFACTURER INSTRUCTIONS
SEE DETAIL 19/VM-2A
VAPOR LINER SEALED
TO CONCRETE ON
EACH SIDE OF COLUMN
VIMS AT COLUMNS - EXPANSION DETAIL (TYP)
NTS
19
VM-2A
CIP CONCRETE COLUMN
CONCRETE FLOOR SLAB
VAPOR LINER SEALED TO CONCRETE
PER MANUFACTURERS INSTRUCTIONS
COLUMN EXPANSION FORM
(INSTALLED OVER VAPOR LINER)
VAPOR LINER
EXTERIOR PERMANENT VACUUM MEASURING POINT (TYP)26
NTSVM-2A
WALL (VARIES)PROVIDE LOCKABLE WEATHERPROOF
ENCLOSURE ON OUTSIDE OF BUILDING
WALL (OR SIMILAR). AFFIX LABEL AT
BOX WITH "VAPOR MITIGATION SYSTEM".
PLACE REMOVABLE PIPE PLUG AT END
OF 2" PIPE.
VAPOR LINER SEALED TO CONCRETE PER
MANUFACTURERS INSTRUCTIONS (TYP)
2" SCH 40 PVC 90
DEGREE ELBOW
2" SOLID SCH 40 PVC PIPE
INSTALLER SHALL SECURE PIPE TO
PREVENT MOVEMENT OR DAMAGE TO
PIPE DURING THE CONCRETE POUR
EXTERIOR GRADE
(VARIES)BASE COURSE
2" OPEN ENDED PIPE, PLACED AT A MINIMUM OF
5' FROM EXTERIOR TURN-DOWN SLABS
PIPE SLEEVE. SLEEVE SHALL NOT PENETRATE
VAPOR LINER.
VAPOR LINER
VAPOR LINER SEALED TO PIPE PER
MANUFACTURERS INSTRUCTIONS (TYP)
POSITION PIPE TO AVOID REINFORCING
(REBAR). SEE STRUCTURAL DRAWINGS
FOR REINFORCING DETAILS
BASE COURSE
FLOOR CLEANOUT, ADJUSTABLE,
4" DIA ZURN INDUSTRIES
MODEL #CO2450-PV4 (OR ENGINEER
APPROVED EQUIVALENT)
SEE DETAIL 25/VM-3
FLUSH WITH
FINISHED FLOOR
PROVIDE PIPE SUPPORT TO PREVENT LOW POINT
IN SOLID SECTION OF PIPE. MAINTAIN MINIMUM
1% SLOPE TOWARD SLOTTED SECTIONS OF PIPE.
(SEE SPECIFICATION #4)
2" SOLID SCH 40 PVC
25 VIMS MONITORING POINT THROUGH THICKENED SLAB WITH EXTENDED INTAKE PIPE
PIPE SLEEVE
NTSVM-2A
OPEN-ENDED PIPE
2" SCH 40 PVC 90-DEGREE
ELBOW
VAPOR LINER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
WALL (VARIES)
28
NTS
VAPOR BARRIER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
1" SCH 40 PVC 90 DEGREE ELBOW
OPEN ENDED PIPE
BASE COURSE
(SEE SPECIFICATION #1)
TEMPORARY MONITORING POINT (TYPICAL)
1" SOLID SCH 40 PVC
TEST PLUG (1" PIPE SIZE)
SET PIPE FLUSH WITH SLAB OR
EXTENDED MORE THAN 6" ABOVE
SLAB. SEE SPECIFICATION #7.
VM-2A
VIMS AT SHEAR WALL
NTS
29
VM-2A
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING/INSULATION (IF PRESENT)
PER MANUFACTURER INSTRUCTIONS
VAPOR LINER
(SEE SPECIFICATION #1)
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
VAPOR INTRUSION
MITIGATION SYSTEM
CROSS-SECTION
DETAILS #17-29
VM-2A
NOTES:
VIMS = VAPOR INTRUSION MITIGATION SYSTEM
TYP = TYPICAL
SCH = SCHEDULE
PVC = POLYVINYL CHLORIDE
NTS = NOT TO SCALE
ALL PIPE MEASUREMENTS ARE BY DIAMETER
PROFESSIONAL
APPROVAL
DEVELOPER:
GREYSTAR
1545 PEACHTREE STREET NE
ATLANTA, GEORGIA
H&H NO. WPP-011
ASCENT SOUTH ENDSOUTH BOULEVARD & EAST KINGSTONCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24051-20-060DATE: 4-19-22
04/19/22
REVISIONS
REV DATE DESCRIPTION
0 11/01/21 DEQ SUBMISSION
1 01/12/22 DEQ SUBMISSION REV 1
2 04/19/22 DEQ SUBMISSION REV 2
S:\AAA-Master Projects\White Point Partners (WPP)\WPP-011 Dilworth Auto Service\VIMP\Figures\VIMP Design_R2.dwg, 4/19/2022 2:35:02 PM, DWG To PDF.pc3
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
VAPOR INTRUSION
MITIGATION SYSTEM
SPECIFICATIONS
VM-3
NOTES:
VIMS = VAPOR INTRUSION MITIGATION SYSTEM
TYP = TYPICAL
SCH = SCHEDULE
PVC = POLYVINYL CHLORIDE
NTS = NOT TO SCALE
MIL = THOUSANDS OF AN INCH
ALL PIPE MEASUREMENTS ARE BY DIAMETER
PROFESSIONAL
APPROVAL
VIMS SPECIFICATIONS
1.THIS VAPOR MITIGATION PLAN IS INTENDED TO BE USED FOR DIRECTION OF VIMS COMPONENT INSTALLATION ONLY AND IS NOT INTENDED TO GUIDE CONSTRUCTION OF BUILDING
STRUCTURAL COMPONENTS. CONSTRUCTION CONTRACTOR SHALL VERIFY CONSISTENCY OF VIMS DETAILS WITH APPLICABLE STRUCTURAL, ARCHITECTURAL, MECHANICAL, & PLUMBING PLANS
AND RESOLVE ANY INCONSISTENCIES PRIOR TO VIMS INSTALLATION.
2.VIMS VAPOR LINER SHALL BE VAPORBLOCK PLUS 20 (VBP20) 20-MIL VAPOR LINER MANUFACTURED BY RAVEN INDUSTRIES (RAVEN). AS AN ALTERNATIVE, DRAGO WRAP 20-MIL VAPOR LINER
MANUFACTURED BY STEGO INDUSTRIES, LLC (STEGO) CAN BE USED, PENDING APPROVAL BY THE ENGINEER.
2.1.THE VAPOR LINER SHALL BE INSTALLED AS SPECIFIED HEREIN AND PER MANUFACTURER INSTALLATION INSTRUCTIONS TO CREATE A CONTINUOUS LINER BELOW MITIGATED AREAS, AND
ALONG RETAINING WALLS 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 BE INSTALLED BENEATH THE VIMS VAPOR LINER. A SIMILAR HIGH PERMEABILITY STONE MAY BE USED, PENDING APPROVAL BY THE ENGINEER.
2.2.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 OCCUPIED ENCLOSED SPACES.
2.3.VAPOR BARRIER SHALL BE INSTALLED ON SLABS, WALLS, AND OTHER STRUCTURAL COMPONENTS WHICH COME IN CONTACT WITH BOTH AN OCCUPIABLE ENCLOSED SPACE AND SOIL.
2.4.VAPOR BARRIER SHALL BE TERMINATED AT LEAST 1 FT PRIOR TO CONTACT WITH NON-MITIGATED AREAS, INCLUDING THE GROUND SURFACE.
2.5.ALL CONCRETE BOXOUTS, INCLUDING BUT NOT LIMITED TO SHOWER/BATH TUB DRAINS, SHALL HAVE A CONTINUOUS VAPOR LINER INSTALLED BELOW.
3.SUB-SLAB SLOTTED VAPOR COLLECTION PIPE SHALL BE THREADED FLUSH JOINT 3" SCH 40 PVC PIPE WITH 0.020" TO 0.060" SLOT WIDTH AND 1/8" SLOT SPACING. AN ALTERNATE SLOT PATTERN,
OR SCH 40 PVC PERFORATED PIPE WITH 5/8" OR SMALLER DIAMETER PERFORATIONS, OR SOIL GAS COLLECTOR MAT (1" X 12"), WITH SIMILAR AIR FLOW CHARACTERISTICS TO THE SLOTTED PIPE
MAY BE USED PENDING APPROVAL BY THE DESIGN ENGINEER. IF CIRCULAR PIPE IS USED, A CAP WITH 12" DIA HOLES OR SLOTS SHOULD BE INSTALLED ON THE OPEN PIPE END. PVC PIPE JOINTS
SHOULD BE DRY-FITTED BELOW THE SLAB OR CONNECTED WITH SCREWS.
3.1.SLOTTED COLLECTION PIPING SHALL BE SET WITHIN A MINIMUM 5” BASE COURSE LAYER, WITH APPROXIMATELY 1” OF BASE COURSE MATERIAL BELOW THE PIPING.
3.2.SOIL GAS COLLECTOR MAT SHALL NOT BE USED THROUGH A CONCRETE FOOTING. SCH 40 PVC PIPE (3" DIA) SHALL BE USED FOR ALL SUB-SLAB VENT PIPE CROSSINGS THROUGH FOOTINGS.
IF SOIL GAS COLLECTOR MAT IS USED, MANUFACTURER APPROVED FITTINGS SHALL BE UTILIZED TO CONNECT THE SOIL GAS COLLECTOR MAT PVC PIPING FOR CROSSINGS THROUGH
FOOTINGS.
4.4" DIA METAL PIPE RATED FOR DRAIN, WASTE, VENT (DWV) APPLICATIONS SHALL BE INSTALLED TO CONNECT EACH SLAB PENETRATION LOCATION TO THE EXHAUST DISCHARGE POINT.
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 THE
CONSTRUCTION DOCUMENTS AND DRAWINGS. VERTICAL RISER PIPING SHALL BE CONNECTED AIR-TIGHT FITTINGS (NO-HUB FITTINGS AND PIPES ARE ACCEPTABLE). VERTICAL RISER PIPING
MUST BE INSTALLED PER 2018 NORTH CAROLINA STATE PLUMBING CODE. VIMS BELOW AND ABOVE GRADE SOLID PIPING SHALL NOT BE TRAPPED AND SHALL BE SLOPED A MINIMUM OF 1/8
UNIT VERTICAL BY 12 UNITS HORIZONTAL (1% SLOPE) TO GRAVITY DRAIN. BENDS, TURNS, AND ELBOWS IN VERTICAL RISER PIPES SHALL BE MINIMIZED FROM THE SLAB TO THE ROOFTOP.
5.EXHAUST DISCHARGE LOCATIONS SHALL BE A MINIMUM OF 10 FT FROM ANY OPERABLE OPENING OR AIR INTAKE INTO THE BUILDING, 10 FT FROM PUBLIC AREAS, AND 20 FT FROM THE
GROUND ELEVATION. AN ELECTRICAL JUNCTION BOX (120V REQUIRED) FOR OUTDOOR USE SHALL BE INSTALLED WITHIN 5FT OF THE EXPOSED RISER PIPE PRIOR TO THE EXHAUST DISCHARGE
FOR POTENTIAL FUTURE CONVERSION TO ELECTRIC FANS, IF REQUIRED. A MINIMUM 2 FT SECTION OF RISER PIPE MUST BE INSTALLED IN A VERTICAL ORIENTATION IMMEDIATELY PRIOR TO THE
EXHAUST DISCHARGE WITH FLANGES OR UNIONS TO ALLOW ROOM FOR A POTENTIAL FUTURE ELECTRIC FAN, IF REQUIRED. ALL WIRING AND ELECTRICAL SHALL BE INSTALLED PER APPLICABLE
BUILDING AND ELECTRICAL CODES.
6.ABOVE-SLAB ACCESSIBLE RISER DUCT PIPING SHALL BE PERMANENTLY IDENTIFIED BY MEANS OF A TAG OR STENCIL AT A MINIMUM OF ONCE EVERY 10-LINEAR FT WITH "VAPOR MITIGATION.
CONTACT MAINTENANCE". LABELS SHALL ALSO BE FIXED TO THE TURBINE FANS IN AN ACCESSIBLE LOCATION ON THE ROOFTOP.
7.MONITORING POINTS SHALL CONSIST OF 2-INCH DIAMETER SCH 40 PVC PIPE WITH A 90-DEGREE ELBOW TO FORM AN “L” SHAPE. A MINIMUM OF 6” SECTION OF PIPING SHALL BE SET WITHIN
THE BASE COURSE LAYER WITH AN OPEN ENDED PIPE OR PIPE PROTECTION SCREEN AT THE TERMINATION. THE PIPE TERMINATION SHALL BE ENCASED WITHIN THE BASE COURSE LAYER. THE
HORIZONTAL PIPING SHALL BE SLOPED A MINIMUM OF 1/8 UNIT VERTICAL BY 12 UNITS HORIZONTAL (1% SLOPE) TO GRAVITY DRAIN TOWARDS THE PIPE TERMINATION AND PREVENT
MOISTURE FROM COLLECTING AT THE 90-DEGREE ELBOW. A 4-INCH DIAMETER ADJUSTABLE FLOOR CLEAN-OUT (ZURN INDUSTRIES MODEL #CO2450-PV4, OR EQUIVALENT) SHALL BE INSTALLED
AND SET FLUSH WITH THE FINISHED CONCRETE SURFACE. MONITORING POINT INTAKE SHALL BE MINIMUM 5-FT FROM EXTERIOR FOOTING.
7.1.TEMPORARY MONITORING POINTS MAY BE ABANDONED USING AIR-TIGHT SEALANT AND CONCRETE AFTER TESTING PER PERMISSION OF THE DESIGN ENGINEER AND DEQ.
8.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL USE "LOW OR NO VOC" PRODUCTS AND MATERIALS, WHEN POSSIBLE, AND SHALL NOT USE PRODUCTS CONTAINING THE
COMPOUNDS TETRACHLOROETHENE (PCE) OR TRICHLOROETHENE(TCE). THE CONSTRUCTION CONTRACTOR AND SUB-CONTRACTORS SHALL PROVIDE SAFETY DATA SHEETS (SDS) TO THE
ENGINEER FOR THE PRODUCTS AND MATERIALS USED FOR CONSTRUCTION OF THE VIMS.
9.IN INSTANCES WHERE A THICKENED FOOTING OR RETAINING WALL IS NOT SPECIFIED AT THE EXTENT OF VAPOR LINER, A THICKENED SLAB OR FOOTER SHALL BE INSTALLED BY THE CONTRACTOR
THAT INCLUDES A SOIL SUBBASE TO CREATE A CUT-OFF FOOTER AT THE EXTENT OF VAPOR LINER. THE ADDITIONAL THICKENED SLAB OR FOOTER SHALL NOT ALLOW FOR CONTINUOUS GRAVEL
BETWEEN THE VIMS EXTENTS AND EXTERIOR PORTIONS OF THE BUILDING WITH AT LEAST 12" SEPARATION OF ADJACENT GRAVEL BEDS. THE THICKENED SLAB OR FOOTER SHALL BE A
MINIMUM OF 5" GREATER IN THICKNESS THAN THE SURROUNDING SLAB.
10.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL AVOID THE USE OF TEMPORARY FORM BOARDS THAT PENETRATE THE VAPOR LINER WHERE POSSIBLE. IF TEMPORARY FORM
BOARDS ARE USED, THE SIZE AND NUMBER OF PENETRATIONS THROUGH THE VAPOR LINER SHALL BE LIMITED AND SMALL DIAMETER SOLID STAKES (I.E. METAL STAKES) SHALL BE USED. IN ALL
CASES, AS FORM BOARDS ARE REMOVED, THE CONTRACTOR OR SUB-CONTRACTORS SHALL RESEAL ALL PENETRATIONS IN ACCORDANCE WITH VAPOR LINER MANUFACTURER INSTALLATION
INSTRUCTIONS.
10.1.HOLLOW FORMS OR CONDUITS THAT CONNECT THE SUB-SLAB ANNULAR SPACE TO ENCLOSED ABOVE SLAB SPACES SHALL NOT BE PERMITTED.
11.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 APPROVED DESIGN. THE REQUIRED INSPECTION COMPONENTS INCLUDE: (1) INSPECTION OF SUB-SLAB PIPING LAYOUT, (2) GRAVEL PLACEMENT, AND (3) MONITORING POINT PLACEMENT
PRIOR TO INSTALLING VAPOR BARRIER; (4) INSPECTION OF VAPOR BARRIER PRIOR TO POURING CONCRETE; (5) INSPECTION OF ABOVE-GRADE PIPING LAYOUT; AND (6) INSPECTION OF 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 PERFORM THE REQUIRED INSPECTIONS. A MINIMUM 48-HOUR NOTICE SHALL BE GIVEN TO THE ENGINEER PRIOR TO THE
REQUIRED INSPECTION(S).
12.PIPE SLEEVES, IF USED, SHALL BE PROPERLY SEALED TO PREVENT A PREFERENTIAL AIR PATHWAY FROM BELOW THE SLAB INTO THE BUILDING. REFER TO TO STRUCTURAL DRAWINGS FOR
DETAILS ADDRESSING VIMS PIPING.
13.WATERPROOFING INCLUDING MEMBRANES AND DRAINAGE MATS SHALL BE INSTALLED IN ACCORDANCE WITH THE ARCHITECTURAL AND STRUCTURAL PLANS. IF WATERPROOFING IS PRESENT,
THE VAPOR BARRIER SHALL BE INSTALLED BETWEEN WATERPROOFING AND ANY DRAINAGE FEATURES INCLUDING DRAINAGE MATS WHERE IT OVERLAPS (SEE DETAIL #16). THE INSTALLER
SHALL CONFIRM THAT THE WATERPROOFING PRODUCTS AND SEALANTS USED DURING CONSTRUCTION ARE COMPATIBLE WITH THE SPECIFIED VAPOR BARRIER.
04/19/22
DEVELOPER:
GREYSTAR
1545 PEACHTREE STREET NE
ATLANTA, GEORGIA
H&H NO. WPP-011
ASCENT SOUTH ENDSOUTH BOULEVARD & EAST KINGSTONCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24051-20-060DATE: 4-19-22
REVISIONS
REV DATE DESCRIPTION
0 11/01/21 DEQ SUBMISSION
1 01/12/22 DEQ SUBMISSION REV 1
2 04/19/22 DEQ SUBMISSION REV 2
S:\AAA-Master Projects\White Point Partners (WPP)\WPP-011 Dilworth Auto Service\VIMP\Figures\VIMP Design_R2.dwg, 4/19/2022 2:35:35 PM, DWG To PDF.pc3