HomeMy WebLinkAbout15032_800 Chatham_SIR_20210429
DWM Brownfields Inspection Report
Submitted By: jkslaughter_ncdenr
Submitted Time: 05/04/2021 9:08 AM
I. Inspection Information
Date & Time: 04/29/2021 9:09 AM Inspection Type: Meeting
Brownfields Staff:
Kevin Slaughter
Other Personnel:
Jeff Tyburski-Geosyntec
Location:
Lat: 36.10485, Long: -80.25474,
Brownfields Inspection Report: 800 Chatham Road, 15032-11-034
04/29/2021 9:09 AM
Page 2 of 9
II. Project Information
Number: 15032-11-034 Name: 800 Chatham Road
Address: 800 Chatham Road
City: Winston Salem
County: Forsyth
III. Environmental
Current Use of Property: Residential
Structures on Property: Existing Structures Violation: No
Vapor Mitigation Systems: Observed Vapor Mitigation Violation: No
Use of Surface Water or Groundwater: Not Observed Water Use Violation: No
Summary: Several operational roof top fans, and interior maintenance area VIMS fans
(currently turned off during testing), were observed during the Site Inspection.
Geosyntec had replaced one older roof mounted fan, and were pilot testing a more
powerful VIMS fan on an existing VIMS riser during the site visit.
Two additional temporary fans were observed that were being used for pressure testing
spaces to evaluate the effect of positive pressure on VI rates which were monitored in
real time utilizing a portable gas chromatograph.
As noted above, the VIMS system has been unsuccessful in portions of the site based on indoor
air sampling. The intent of pilot testing and retrofit efforts is to bring the entire building into
compliance with VIMS requirements and indoor air sampling demonstrates the building is safe for
occupancy.
Summary: N/A
Summary: Existing building on property has been renovated for multi-residential
apartments. VI mitigation has been unsuccessful in many sections of the building, which
is currently being addressed/investigated as of the date of inspection.
Brownfields Inspection Report: 800 Chatham Road, 15032-11-034
04/29/2021 9:09 AM
Page 3 of 9
Exposed Soils: Not Observed Exposed Soils Violation: No
Use of Basements: Observed Basement Violation: No
Storage of Chemicals: Not Observed Chemical Violation: No
Groundwater Monitoring Wells: Not Observed Monitoring Well Violation: No
Current Exposure to Public/Public Risk:
Summary: N/A
Summary: There are maintenance areas, common hallways, residential units, and atrium
that are at least partially below the surrounding grade. No spaces are occupied that have
not been approved by the NC DEQ Brownfields Program.
Summary: N/A
Condition:
Summary: N/A
Geosyntec is performing VI mitigation system enhancements/repairs/and testing in an
attempt to determine sources of current VI issues within the apartment building. With
relatively high levels of VI present within Atrium and at least some first floor units, there
are concerns that residents in the building are at risk of exposure until the source of VI
into the building can be located and addressed and confirmation sampling demonstrates
indoor air is safe for occupancy. Occupied spaces have been sampled previously prior to
occupancy. Upper floors where a GAC filter was previously required for occupancy will
be tested again following mitigation efforts.
Brownfields Inspection Report: 800 Chatham Road, 15032-11-034
04/29/2021 9:09 AM
Page 4 of 9
IV. Inspector Comments
V. PHOTOGRAPHS
Photo 1: Portion of former mill building (white siding) being investigated by Geosyntec during
Site Inspection.
The purpose of this inspection was to observe active VIMS diagnostic testing within the
building to determine the source of vapor intrusion within the Site building for mitigation
to proceed and complete occupancy of the building to eventually be allowed.
Mobile lab onsite to evaluate the effects of recent floor sealing activities, positive and
negative pressure testing, evaluating more powerful roof mounted fans, and existing vapor
barrier sealing. In addition, air samples are being analyzed from the breathing zone within
first floor apartments, atrium, and void spaces within walls, brick columns, and additional
locations to determine where VI is taking place, and appropriate ways to mitigate.
Brownfields Inspection Report: 800 Chatham Road, 15032-11-034
04/29/2021 9:09 AM
Page 5 of 9
Photo 2: Mobile lab being operated by Blayne Hartman to diagnose sources of VI, and the
effects of building sealing, fan replacements, pressurization, and other temporary mitigation
system modifications.
Photo 3: Measurement of potential VI pathway inside brick column using mobile lab. Second
sample tube visible in photo used for measurement of indoor air within atrium.
Brownfields Inspection Report: 800 Chatham Road, 15032-11-034
04/29/2021 9:09 AM
Page 6 of 9
Photo 4: Extensive sealing of potential VI pathways performed before the beginning of
weeklong mitigation system testing.
Photo 5: Temporary sealing of existing VI barrier in crawlspace around utility penetrations
performed.
Brownfields Inspection Report: 800 Chatham Road, 15032-11-034
04/29/2021 9:09 AM
Page 7 of 9
Photo 6: Pilot testing larger blower system on rooftop VIMS riser to evaluate effects of higher
vacuum/airflow on VI within building.
Photo 7: One of the maintenance area VIMS fans used to remove VOC’s from behind VIMS
barrier (Photo 5). Fan currently turned off during testing.
Brownfields Inspection Report: 800 Chatham Road, 15032-11-034
04/29/2021 9:09 AM
Page 8 of 9
Photo 8: One of two pilot testing fans observed during the Site Inspection. Fans are being used
to evaluate the effects of positive pressure, and dilution, on VI into the apartment building.
Photo 9: Example of drywall removal within vacant apartment unit for investigative
purposes/mobile lab & PID sampling from within the space. Exterior grade approximately 1-2
ft. below the window in photo.
Brownfields Inspection Report: 800 Chatham Road, 15032-11-034
04/29/2021 9:09 AM
Page 9 of 9
Photo 10: Atrium space within building where higher VI detections are present. Tubing that
runs to mobile lab can be seen hanging across lower portion of atrium, and located below blue
tape on floor to prevent tripping hazard.