20058_ Southern Loop_DM_20170530.pdf

DECISION MEMORANDUM DATE: May 30, 2017 FROM: Carolyn Minnich

TO: BF Assessment File RE: Southern Loop Property 10620 and 10710 Southern Loop Blvd
Pineville, Mecklenburg County
BF # 50058-16-060 Based on the following information, it has been determined that the above referenced site, whose intended use industrial, office, parking, retail, warehousing and subject to
DEQ’s prior written approval, other commercial purposes, is or can be made suitable for
the intended reuses. Introduction:
The Brownfields Property is 2 parcels approximately 5.88 acres and located in an
industrial area. The specific addresses are 10620 and 10710 Southern Loop Blvd. (PIN 20514212 and 20514127). The Property is downgradient and northeast of the former Universal Stainless facility (the subject of NC Brownfields Project No. 09048-05-060).
Redevelopment Plans:
Redevelopment on the Brownfields Property will be through a third party and uses includes industrial, warehousing, office, parking and, subject to DEQ’s prior written approval, other commercial uses. On September 30, 2016, the Prospective Developer sold the 10620 Southern Loop Boulevard Parcel to Anderson Industrial Corporation. The
10710 Southern Loop Boulevard is under contract for purchase to be completed soon. Site History: The 10620 Southern Loop Boulevard Parcel is ~1.84 acres and is currently
utilized by Anderson American for general office activities and warehouse storage. This
parcel was undeveloped agricultural land as early as 1938. It was cleared and graded in the late 1980s and developed with the current Site building in 1992. The 10620 Southern Loop building was utilized by Lindemann Recycling for manufacturing recycling equipment from the 1990s until the early 2000s. Baumann Springs used the facility for
administrative offices and warehousing for a short time in the mid-2000s. From 2008
until 2015, Para USA utilized the facility for assembly and distribution of hand guns. Between 2015 and early 2017, the facility was occupied by a furniture company and was used as a showroom and for inventory overflow storage. The 10710 Southern Loop Boulevard Parcel is ~4.4 acres and is currently vacant.
It was undeveloped agricultural land as early as 1938. This parcel was cleared and
graded in the late 1980s and developed with the current Site building in 1989. This
parcel was occupied by Baumann Springs from initial construction until the mid-2000s. Operations associated with Baumann Springs included metal cutting and forming, ultrasonic cleaning, and shipping operations. Anderson America occupied the building from approximately 2010 to 2017 and utilized the facility for general office activities,
storage, and demonstrations of large woodcutting machinery. A portion of the parcel
remains undeveloped cleared land. Future construction is likely on this portion of the brownfields property. Located upgradient and to the west of the brownfields property is the former Universal Stainless (NC Brownfields Project No. 09048-05-060 and IHSB No.
NONCD0002654). An undefined chlorinated solvent plume in groundwater has been
identified. Monitoring wells were installed to evaluate potential impacts. Groundwater samples from wells near the property boundary had higher concentrations than other locations.
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 Limited soil sampling has been conducted at the Brownfields Property. Laboratory
analytical results for soil samples collected beneath the slab of the 10620 Southern Loop
Boulevard building indicate that arsenic concentrations (up to 4.0 mg/kg) were detected slightly above the DEQ Inactive Hazardous Waste Sites Branch (“IHSB”) Unrestricted Use Preliminary Soil Remediation Goal (“PSRG”) of 3.0 mg/kg. The arsenic concentrations detected beneath the slab of the 10620 Southern Loop Boulevard building
are consistent with naturally occurring concentrations in North Carolina soil and are
considered to be background levels. No other compounds were detected above the IHSB Unrestricted Use PSRGs and no compound concentrations were detected above the Industrial/Commercial PSRGs.
Groundwater
Laboratory analytical results of groundwater samples collected on the 10710 Southern Loop Boulevard portion of the Brownfields Property in May 2016 indicate that tetrachloroethene (“PCE”) and trichloroethene (“TCE”) were detected above the North Carolina groundwater standards at concentrations up to 60 µg/L and 9.7 µg/L,
respectively. No compounds were detected above the North Carolina groundwater
standards in groundwater samples collected on the 10620 Southern Loop Boulevard portion of the Brownfields Property. Groundwater flow direction beneath the Brownfields Property is toward the east-southeast. Based upon the groundwater flow direction and distribution of compounds (i.e., highest concentrations in the upgradient
portion of the Brownfields Property), groundwater impacts on the 10710 Southern Loop
Boulevard appear to be associated with migration from the adjacent former Universal
Stainless facility (the subject of NC Brownfields Project No. 09048-05-060).
Surface Water Surface water is not located on the site.

Sub-Slab Vapor No sub-slab data was collected at this site. Indoor Air
Two indoor air samples were collected in interior areas of the 10620 Southern Loop
Boulevard building and two indoor air samples were collected from interior areas of the 10710 Southern Loop Boulevard building to evaluate the potential for vapor intrusion into the site buildings from PCE and TCE impacts detected in groundwater on the 10710 Southern Loop Boulevard Property. Laboratory analytical results for the indoor air
samples indicate that PCE and TCE were not detected at concentrations above DEQ Non-
Residential Indoor Air Screening Levels (“IASLs”) in all four indoor air samples. Only the petroleum related compound 1,2,4-trimethylbenzene was detected at a concentration exceeding the DEQ Non-Residential IASL in one indoor air sample collected in the eastern portion of the 10620 Southern Loop Boulevard building (IAS-3). 1,2,4-
Trimethylbenzene was not detected above laboratory reporting limits in groundwater
samples collected at the site. The presence of 1,2,4-trimethylbezene in indoor air in the 10620 Southern Loop Boulevard building was attributed to petroleum product storage in the building and not migration from the subsurface. Based on indoor air assessment results, there does not appear to be a vapor intrusion concern for the current site
buildings.
Required Land Use Restrictions (LURs): Soil: No exposure under current conditions, future development will require an EMP.
Groundwater: Prohibit the use of groundwater. Vapor: Based on sub-slab sampling results, there is no exposure in current site structures. Require standard vapor intrusion LUR for future structures constructed on property. Based on the site-specific data provided to the Brownfield program, the site reuse is
suitable for the site as long as the agreed upon land use restrictions in the BFA are abided by.