Groundwater Pollution Public

Information Meeting

Hanes Hosiery Recreation Center

January 6, 2016

Presentation Outline

• Welcome/Opening Comments

• Overview/General Location

• Background/History of the Kaba Ilco site

• Pollutants of Concern in the Groundwater

• City of Winston-Salem Activities

• In-door Air Testing/Health Risk Assessment

• Next Steps

• Questions

Background/History

• Kaba Ilco is the current owner, the

former owner of the property was

Stewart-Warner/Bassick Sack

• Kaba Ilco has owned the site since 2001

and soil sampling conducted prior to

2001 showed pollution

• Kaba Ilco has executed an administrative

agreement with state regulators to

implement a remediation plan

(effective 5/5/2014)

• Note: There are likely other sources

contributing to the plume (i.e. NCDOT

plant #54)

Ongoing Kaba Ilco Activities

Groundwater Recovery and Treatment Efforts.

Source: Piedmont Geologic

Background/History

• WS/FC School Board votes to relocate

students from Hanes/Lowrance (February

10, 2015) based on possible vapor intrusion.

• WS/FC School Board hears results from a

consultant determining that vapors in the

school are not at significant levels (March

24, 2015).

• City became involved b/c little data had

been gathered below Hanes/Lowrance south

of 28th street to determine potential risks to

citizens in the area.

• City’s goals were to determine the extent of

the pollution and determine if there are any

potential health risks to citizens.

Pollutants of Concern

Main pollutants found in the groundwater:

• Tetrachloroethene (PCE)= also known as PERC

• Trichloroethene (TCE)

What types of chemicals are these?

These chemicals are volatile organic compounds. They are colorless

liquids that have a sweet odor and evaporate very quickly.

(Note: They are found in common house hold items)

What are these chemicals used for?

Chemical solvents are used in dry cleaning, cleaning of metal

machinery and to manufacture some consumer products and other

chemicals. They are effective cleaning solvents and remove stains

and dirt from all common types of fabrics.

Pollutants of Concern

How can these chemicals effect me in my home?

Source: USEPA

City of Winston-Salem

Activities

Groundwater

Monitoring Well

Locations

City of Winston-Salem

Activities

PCE plume

(Groundwater)

City of Winston-Salem

Activities

PCE plume

(Soil Vapor)

City of Winston-Salem

Activities

TCE plume

(Groundwater)

City of Winston-Salem

Activities

TCE plume

(Soil Vapor)

SAMPLE

LOCATIONS:

PCE BASIS

SAMPLE

LOCATIONS:

TCE BASIS

Indoor Air and Sub-slab

Sampling: PCE Results

Indoor Air and Sub-slab

Sampling: TCE Results

Goals and Next Steps

• City to continue in-door air testing in the area of Patrick and

Stokes.

• Kaba Ilco to continue testing further south in the Ivy and 25th

Street area.

• DEQ and NCDOT will continue discussions to test and

determine potential contributions of the NCDOT Plant #54

site.

• Inform and update citizens as process moves forward.

Kaba Ilco PCE testing

area

(high lighted section)

Map obtained from DWM

2513 Stokes Avenue 600 East 27th Street

2517 Stokes Avenue 604 East 27th Street

516 East 27th Street 601 East 25th Street

518 East 27th Street 521 East 25th Street

520 East 27th Street 515 East 25th Street

City Houses for Phase II Sub-slab and Indoor Air Sampling

Acknowledgments

• USEPA (Vapor Intrusion Diagram)

• Mid Atlantic Engineering and Environmental Solutions

• Griffith Enterprises Inc. (Images courtesy of Alan Griffith)

• United States Environmental Protection Agency (PERC

information).

• Piedmont Geologic (Kaba Ilco Remedial Action Plan)

• North Carolina Division of Waste Management (Inactive Hazardous

Site Branch)

Note: this presentation will be posted to:

http://www.cityofws.org/Departments/Stormwater-Erosion-Control