23062_Herrin Brothers Coal and Ice_SIR_2020.08.07

DWM Brownfields Inspection Report
Submitted By: jkslaughter_ncdenr
Submitted Time: 08/12/2020 8:45 AM
I. Inspection Information
Date & Time: 08/07/2020 12:35 PM Inspection Type: Meeting

Brownfields Staff:
Kevin Slaughter
Other Personnel:
Robert Sorgel & Thomas Vaughan (H&H)
Location:
Lat: 35.24998, Long: -80.80604,

Brownfields Inspection Report: Herrin Brothers Coal and Ice, 23062-19-060
08/07/2020 12:35 PM
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II. Project Information
Number: 23062-19-060 Name: Herrin Brothers Coal and Ice
Address: 315, 319, 321 E 36th
Street

City: Charlotte

County: Mecklenburg

III. Environmental

Current Use of Property: Industrial, Vacant Land
Structures on Property: Existing Structures Violation: No

Vapor Mitigation Systems: Not 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: N/A

Summary: N/A

Summary: several buildings not currently in use associated with former coal and ice
production/sales. There are 1-2 building currently in use for ice production and storage
although none of the buildings were entered, and most were not located in the area
being tested for pressure or presence of methane.

Summary: N/A

Brownfields Inspection Report: Herrin Brothers Coal and Ice, 23062-19-060
08/07/2020 12:35 PM
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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

Site is active and fenced. No concern of public risk due to environmental factors at the
current time.

Brownfields Inspection Report: Herrin Brothers Coal and Ice, 23062-19-060
08/07/2020 12:35 PM
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IV. Inspector Comments

V. PHOTOGRAPHS

Photo 1: Site looking east across E. 36th Street. Former mill work shop is located on far left of
photo. Building in center of photograph (former ice production & storage building), and brick
building on right are not currently in active use.

Onsite to observe H&H collect “afternoon” soil gas pressure and methane measurements using two
GEM 5000 landfill gas meters. The original soil gas points were installed using both hand auger and DPT
rig methods according to H&H, and no protective vaults were installed around these points (Photo 3).

Additional soil gas points requested by DEQ Brownfields were installed at a later date using a DPT rig
and downhole polyethylene tubing contained within a plastic protective vault (Photo 4). During
inspection of the monitoring points, it was observed that a white flexible cover was pushed over the
ends of the tubing at all of the soil gas points instead of a gas tight valve or quick connect fitting being
installed. These flexible caps had to be removed prior to pressure/methane measurements (Photo 3).

Low to no pressure was observed during soil gas pressure measurements, with the highest differential
pressure observed at SG-9 (+0.008” H2O column), with no methane detected. DEQ installed a Dwyer
digital manometer on soil gas point SG-9 following H&H’s readings (including GEM 5000 pump
operation), and as described in Photo 5, and similar differential pressure results were obtained.

According to H&H, methane had only been observed in 3 monitoring points SG-1, SG-5, and SG-10
during prior events, with SG-1 having the highest methane detection. This was also observed during the
August 7, 2020 monitoring event with SG-1 methane recorded at 12.9% by volume (bv) Photo 6. Soil
gas points SG-5 and SG-10 were measured at 2.6% and 1.5% methane bv respectively.
Brownfields Inspection Report: Herrin Brothers Coal and Ice, 23062-19-060
08/07/2020 12:35 PM
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Photo 2: View looking north across property. Former ice production building on left, and
newer ice production building on right.

Photo 3: Typical soil gas point tubing capped with a white flexible cap which appeared to form a
good seal. However, the seal was broken when connecting the GEM 5000 to the soil gas point
tubing due to lack of a valve or quick connect fitting being installed.
Brownfields Inspection Report: Herrin Brothers Coal and Ice, 23062-19-060
08/07/2020 12:35 PM
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Photo 4: H&H personnel recording differential pressure measurement using Landtec GEM 5000
on SG-9 adjacent to newer ice production building. Slight positive pressure (0.008” H20 column)
observed. However, no methane was observed which is consistent with prior measurements.

Photo 5: DEQ Dwyer Series 475 Mark III digital manometer recording differential pressure at
SG-9 following H&H measurements. Initially, 0.000" H20 column pressure was observed.
Pressure climbed to 0.010" H20 column over a period of 5 minutes (similar to H&H’s reading
above). No additional pressure increase was observed prior to removal ten minutes later.
Brownfields Inspection Report: Herrin Brothers Coal and Ice, 23062-19-060
08/07/2020 12:35 PM
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Photo 6: GEM 5000 connected to SG-1 where highest methane readings have historically been
observed. Soil gas differential pressure recorded by H&H at -0.001" H2O, and methane
recorded at 12.9% bv. DEQ digital manometer installed on SG-1 following H&H’s readings due
to elevated methane levels. No pressure was observed over a period of 1.25 hours before
removing the Dwyer Series 475 Mark III digital manometer.