07010 East Park D Hall_Memo-Site Photos

May 2, 2006
DECISION MEMORANDUM

FROM: Carolyn Minnich
TO: BF Assessment File

CC: Sandra Moore

RE: East Park Dorothy Hall Site 1423 and 1427 East Fourth Street, Charlotte, Mecklenburg
BF # 07010-03-60

In December 2004, a Notice of Brownfields Property (Notice) was executed for the above
reference site. The allowable land use on the property was listed as the following: constructing a parking structure on it for use by faculty, staff and students and the general public, and possibly
for retail, commercial and residential use.

Contaminated Media:
In February 2006, the DENR Brownfields Program was notified that impacted soils were found at on the brownfields property during grading activities. Analytical results for soil and
groundwater revealed chlorinated solvent concentrations greater than what was reported in the
Brownfields Agreement. On February 24, 2006, United Consulting submitted a Phase II
Environmental Site Assessment further defining the soil and groundwater impacts on the
property. Additional soil data was also provided on March 17, 2006. On March 21, 2006, DENR required a limited area of soil excavation to remove the impacted soils. At the end of April 2006,
the soil removal work was completed, and the summary report is due to by the end of June 2006.
The estimated soil removal area was 25 ft x 40 ft x 9 ft. Sidewall samples were collected and
were compared with the inactive Hazardous Site Residential Soil Remediation Goals. No
groundwater remediation was required at this time. Due to the presence of VOCs in the groundwater indoor air is potentially contaminated as well.

Potential Receptors:
Workers (office/construction/outdoor/indoor), trespassers, residents, children, horses, pigs, dogs,
etc. (who will be present on site).
Summary
The current owner has agreed to restrict the property use to only a parking garage with no retail,
commercial or residential uses at this time. The current owner was advised to install a passive
vapor barrier prior to construction of the parking garage to allow for future changes but did not want to spend the extra funds at this time. The existing agreement does not call for a vapor
barrier or additional assessment for commercial or retail development. Therefore, it is my
opinion, this use needs to be removed as an allowable use. If residential use is planned,
additional site assessment and/or radon reduction construction standards will be implemented as
stated in Paragraph 7 of the Notice.