18032_Carter Woodson_SIR_20220801

DWM Brownfields Inspection Report
Submitted By: jkslaughter_ncdenr
Submitted Time: 08/02/2022 8:11 AM

I. Inspection Information
Date & Time: 08/01/2022 10:36 AM Inspection Type: Meeting

Brownfields Staff:
Kevin Slaughter, Seth Titley, Tyler Pearson
Other Personnel:
AECOM - John Moran, Jordan Harrell and Jim
Dimitroff
Location:
Lat: 36.066566, Long: -80.23152148

Brownfields Inspection Report: Carter G. Woodson Charter School, 18032-14-034
08/01/2022 10:36 AM
Page 2 of 8

II. Project Information
Number: 18032-14-034 Name: Carter G. Woodson Charter School
Address: 420, 437 Goldfloss St

City: Winston Salem

County: Forsyth

III. Environmental

Current Use of Property: Institutional
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

Exposed Soils: Not Observed Exposed Soils Violation: No

Summary: Active VIMS operating during site visit. Since previous Site Inspection, labeling
has been added to the exterior VIMS exhaust stacks, and the low vacuum alarms have
been moved to the interior of the building as recommended (Photos 5 and 6). Potential
air leakage from vicinity of suction point SSD-12 was investigated, and air within the
building is being pulled beneath interior wall adjacent to the suction point, where a
preferential pathway through the concrete slab must exist as verified using a smoke pen
(Photos 7 and 8).

Summary: N/A

Summary: One story, primarily CMU block, middle school building.

Summary: N/A (in vicinity of school building).

Brownfields Inspection Report: Carter G. Woodson Charter School, 18032-14-034
08/01/2022 10:36 AM
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Use of Basements: Not 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: N/A

Condition:
Summary: N/A

Classes are not currently in session, and with the active VIMS in operation, public
exposure should be minimized, althouh IA, and sub-slab air sampling being performed
during the site visit should confirm this.

Brownfields Inspection Report: Carter G. Woodson Charter School, 18032-14-034
08/01/2022 10:36 AM
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IV. Inspector Comments

V. PHOTOGRAPHS

Photo 1: Connecting Summa cannister fitting/tubing within helium shroud prior to sampling.
Sub-slab vapor-pin VMP-4 visible within cut-out in the bottom of shroud.
The site inspection was performed to observe a sub-slab sampling event being performed by AECOM
at the property. DEQ personnel arrived on-site in time to observe the first sub-slab sample collection
being performed at VMP-4 (Photos 1 through 3). Initially, there was an issue with the helium leak
test, with AECOM determining there was an air leak at the 3-way valve provided by the rental
company. Additional plastic valves were purchased, and the interior of the helium shroud was
replumbed. Following this modification, no additional issues were encountered during purge air
helium leak tests, and sub-slab sampling was able to be performed as planned.

DEQ personnel confirmed there was air leakage taking place below an interior wall adjacent to SSD-
12 while the sampling equipment was being set-up and helium tests were being performed at the
second sub-slab sampling point VMP-2R (Photo 4). This leak testing was described previously in the
Vapor Mitigation Systems Section. DEQ personnel left the property as AECOM finished collecting
sub-slab sample VMP-2R following an update with the Brownfields PM.
Brownfields Inspection Report: Carter G. Woodson Charter School, 18032-14-034
08/01/2022 10:36 AM
Page 5 of 8

Photo 2: fittings connected, shroud sealed, and helium being injected into shroud.

Photo 3: Tedlar bag being filled to check for presence of helium. Prior to valve replacement,
high concentrations of helium observed in purge air.
Brownfields Inspection Report: Carter G. Woodson Charter School, 18032-14-034
08/01/2022 10:36 AM
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Photo 4: Sampling shroud, Summa cannister and additional equipment set up on VMP-2R.

Photo 5: Labels installed below VIMS blowers, and exterior low vacuum alarms removed and
relocated to interior of building since June 30, 2022 Site Inspection.
Brownfields Inspection Report: Carter G. Woodson Charter School, 18032-14-034
08/01/2022 10:36 AM
Page 7 of 8

Photo 6: VIMS alarms relocated from building exterior to building interior. Green/Red alarm
lamps clearly visible indoors, although audible portion of alarm is turned off according to
AECOM during prior Site Inspection

Photo 7: Smoke from smoke pen visible in photo when held away from black rubber floor base.
Brownfields Inspection Report: Carter G. Woodson Charter School, 18032-14-034
08/01/2022 10:36 AM
Page 8 of 8

Photo 8: Smoke is no longer visible as it is being pulled below the interior wall. Note, there is
no air leakage around the suction point itself.