19040_Atando Ave_DM_20170308.pdf

DECISION MEMORANDUM DATE: March 8, 2017 FROM: Carolyn Minnich

TO: Sandra Mort RE: Atando Avenue (Vincent Metals) 527 Atando Avenue
Charlotte, Mecklenburg County
BF # 19040-15-060 Based on the following information, it has been determined that the above referenced site, whose intended use is for no uses other than office, warehousing and industrial, can
be made suitable for such uses.
Introduction: The site is in an industrial area of Charlotte. The property is approximately 4 acres of mostly developed land with a single story commercial building ~7,500 sq ft building with
office area and two warehouse/manufacturing areas totaling approximately 97,211 sq ft. The site is bordered by the following: SW railroad tracks with residential use beyond, NW and SE by industrial facilities, NE by Atando Avenue with industrial use beyond. Sunbelt Turret Steel, Inc. is the current tenant on the property. They are a steel bar stock
distributor. They only use a portion of the property. The other warehouse is vacant. Redevelopment Plans:
Redevelopment plans include upfitting the building, and getting the property fully leased.
The existing structures will be used; no demolition or new building are planned at now. Due to historical releases on the property, it is difficult to obtain lending on the property. The property will be used for NON-Residential use only, specifically industrial, warehousing, and office.

Site History: 1938 cleared land, may have been used for agriculture use. 1949 office/warehouse building, 104,757 sq ft structure located in the
center of the site, one story slab on grade
Few years later two warehouse additions built, between 1950 and 1968. Tax summary reports structure built in 1949 only.

Uses per city directory 1953 Edgecomb Steel Co. 1984 Vincent Brass and Aluminum Co. foundries 1989 Vincent Metals foundries
2005 Sunbelt Turrent Steel Inc.
2007 Precast Supply Co, Sunbelt Turret Steel Industries 2012 Sunbelt Steel Company Two incidents are associated with the property:

1. IHSB NONCD0001992, In December 2013, IHSB received a Limited Phase II Site Assessment Report and related documents for property located at 527 Atando Avenue in Charlotte, NC, owned by Gould Family Property, LLC. Additional supporting documents and information were provided on February 25, 2014.
Onsite groundwater impacts of PCE, TCE, 1,2-DCE, and Vinyl Chloride
contamination were documented in the report and supporting materials along with a general claim that the contamination was originating from an off-site issue. DEQ is still investigating the claim that DyDee Diaper Property is the source area.
2. UST, Incident No. 27296, Integris Metals (former) Release from petroleum UST
on site have impacted soils and groundwater. A small amount of product was found in MW-1 during additional brownfields assessment. In February 2016, Brett Morris of UST Section sent a letter for additional assessment and removal activities. This source area is being addressed through UST Section.

Potential Receptors: Potential receptors are: construction workers, on-site workers, visitors, and trespassers. Contaminated Media:
DEQ has evaluated data collected from the following media at the subject property: soil, groundwater, and vapor. DEQ relies on the following data to base its conclusions regarding the subject property and its suitability for its intended reuse. Soil
A majority of the property is covered with imperious cover such as asphalt or building. Limited soils samples have been collected. The highest concentrations were on the north side of the property adjacent to former DyDee Diaper. Recommend soil restrictions for future development. No exposure in current development.
The concrete floor in the warehouse is extremely thick, approximately 8 inches. It is 5 inches thick in the office area.

Groundwater Restrict groundwater use and exposure with LURs. Groundwater samples exceed 2L standards for chlorinated solvents. Previous owners claim they did not use chlorinated
solvents and the source is off site, such as DyDee Diaper Property. This is still being
reviewing by IHSB.
Surface Water Surface water is not located on the site.

Soil Vapor
Sub-Slab Vapor
In November 2015, three temporary sub slab samples were installed and soil vapor gas
samples were collected. Samples were analyzed for TO-15 Method. SV-04 in the warehouse was the worst case sample. Screening levels were exceeded and indoor air sampling was scheduled.
Indoor Air
Two rounds of indoor air samples were collected in February 2016 and August 2016. There are exceedances inside the building and outside the building. In some cases, the outdoor levels are higher than inside the building. After entering the data into the Risk
Calculator, the existing structure is within acceptable risk based exposure for
industrial/commercial use.
Risk Calculations Risk Calculations were performed using Excel worksheets provided by Sandy Mort,
NCDEQ Brownfields Toxicologist. The risk calculations indicated the following based
on available data, including the following media: groundwater, residual soil (based on confirmatory soil data), soil gas, indoor air, and fill soil samples:
Medium Site Area
Non-Residential
LICR HI
Indoor Air Worst Case 2.9 E-06 0.18
Indoor Air Cumulative 7.4 e-06 0.35
Soil Worst Case 1.62 E-05 3.93 E-03
Red shading LICR> 1E-04 or HI> 1.
LICR = Lifetime Incremental Cancer Risk HI = Hazard Index
Notes from Sandra Mort:
o The worst case exposure scenario for the August 2016 data (using the maximum
detected VOC concentration for the outdoor air combined with the building indoor
air) inhalation risks for a commercial exposure are less than the DWM maximum
cumulative risk criteria. Note: some of the outdoor air VOCs were higher than the
building indoor air detections & there were VOCs detected in the outdoor air that
were not detected in the building indoor air.
• Cumulative risk, August 2016: 7.4e-06 cancer; 0.35 HI (non-cancer)

o The same worst case analysis of inhalation risks (maximum detected indoor air or
outdoor air VOCs) was run for the Nov. 2015 data, with data taken from the visl
calculators in the Sept. 19, 2016 Limited Site Investigation Report appendix. Risks for
the commercial exposure scenario were less than DWM's maximum cumulative risk
criteria.
• 2.6e-06 cancer, 0.18 HI non-cancer
o Soil direct contact risks were not evaluated since it is identified that the soils are all
covered & there is no direct contact potential and any change in this condition will
be addressed by LURs.

Required Land Use Restrictions: Based on the site-specific data provided to the Brownfield program, the site reuse is suitable for the site if the agreed upon land use restrictions in the BFA are abided by.
The following will be included in the draft BFA:
1. Soil: standard from menu 2. GW: standard from menu 3. Vapor: for new building assessment or mitigation is required
4. EMP will be required for redevelopment activities