05006 Browns Solvent Summary of GW Toluene 20100308

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i/lMACTEC
engineering and constructing a better tomorrow
March 8, 201 0 ~/-.---~-'----~

Ms. Car~y6Minnich

No Carolina Department of Environment and Natural Resources

ivision of Waste Management

Brownfields Program

401 Oberlin Road, Suite 150

Raleigh, North Carolina 27605

Subject: Summary of Groundwater Analytical Results for Toluene /Brownfi~entSite /
293>'crlffith Street .
harlotte, North Carolina (
MACTEC Project: 6 -10-5182
/ " r Ms. Minnic . \ '
On behalf of Mr. Frank McCleneghan, MA<tTEC Engineering and Consulting, Inc. (MACTEC) is
providing this summary of groundwater arlalyticalr,~sults for toluene for the subjec~ property.
Land Use Restrictions (LUR) specified iJi the the ~HrQwnfields Agreement requir~ bi-annual
sampling of two monitoring wells (MW-I adp MW-4) to monitor the levels of toluene: within the
groundwater at the site. Well MW-I is situ~ted with.i,Bo-th~pner tank basin at the !rear of the
ilding while well MW-4 is located in the opposite ,comer of th-e'Rroperty, downgradient of the
rel . \ / \,"'0",-----,--­'
The Brownfields agreement stiP::~iliafif th~ toluene concentr,~tion ~' w,~ll MW~l rem~ins;'
below the established Gross Contaminant Lev;~(qCL) of 257,000 flg/L for'tW,Q., copse Lti,,:~
sampling events, then the property own6 may p~tion the NC Brownfields Program "(or /!]
termination of the bi-annua! groundwater sampling requit€~ent. Ms. M' .ch requested to review ./:' \
a summary table of historical analytical data to date (Tabl 1) to nfirm he observed dec~as€"
toluene concentrations. _./~
Since the last two consecutive sampling events (February 2010 and August 2007) identified
concentrations of toluene below the GCL, on behalf of our client, MACTEC requests removal of
the LUR and tennination of the bi-annual groundwater sampling requirement.
MACTEC is pleased to have the opportunity to offer our environmental services on this project. If
you have questions, please contact Mr. Rob Foster at [phone].
Sincerely,

MACTEC ENGINEERING AND CONSULTING, INC.

h ~.-IU
Kerry A. Reed, P.E., LEED AP

Senior Engineer

cc: Frank McCleneghan, Piedmont Properties
MACTEC Engineering and Consulting, Inc.
2801 Yorkmont Road, Suire 100 • Charlolle, NC 28208 • Phone [phone]. Fax 704357,8638
license Number: F-0653 www.mactec.com
Prilllcd wI,II Elll'ironmeIJ/(llIy·RespOII.fihle ProdlU'ff
Plens<'Renc/(;:
Summary o/Groundwater Ana(ytical Results/or Toluene March 8,2010
2935 Griffith Street, Charlotte, North Carolina
MACTEC Project: 6228-10-5182
Table 1

Summary of Groundwater Analytical Results for Toluene

MW-l
/lg!L
MW-4
j.!g/L
February 10,2010 6,160 <1
August 28, 2007 85,000 <1
November 14,2003 420,000 <1
Notes: All results m flglL Prepared by:~I a
GeL for Toluene = 257,000 flglL Reviewed by: ~/&,/IO
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M.ACTEC Engin,
2801 Yorkmont Roaa,
license Number F-0653