NC0089656_Modification_20180725

pa rdh rr*ao 1r,, 4.*
ri-1:,dyq Y, ,-4.:, ...,_,
Ii
,� �.�.a,,��,.b?,:
vaav
ROY COOPER NORTH CAROLINA
GovernorEnvironmental Quality
MICHAEL S.REGAN
Secretmy
LIND A CULPEPPER
Interim Director
August 01, 2018
Jason Frost
DC Charlotte Plaza Lllp
3344 Peachtree Rd Ste 1800
Atlanta, GA 30326
Subject: Permit Renewal
Application No. NC0089656
Dimensional Place
Mecklenburg County
Dear Applicant:
The Water Quality Permitting Section acknowledges the July 25, 2018 receipt of your permit modification application and
supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW permitting
branch. Per G.S. 1506-3 your current permit does not expire until permit decision on the application is made.
Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. The
permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a
timely manner to requests for additional information necessary to allow a complete review of the application and renewal
of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
httr s://deq.nc.gov/permits-regulations/permit-guidance/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincerely,
„_.4110,110 acA
Wren Thed ord
Administrative Assistant
Water Quality Permitting Section
cc: Central Files w/application
ec: WQPS Laserfiche File w/application
D_EQ
—?,),
owmn.+ ,E.,.Meworry,
North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-807-6300

r
July 24, 2018
Ms.Wren Thredford
North Carolina Department of Environmental Quality
Division of Water Resources
Water Quality Permitting Section — NPDES ,
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Major Permit Modification
Dimensional Place
Camden Road, South Tryon Street and West Park Avenue
1515 South Tryon Street
Charlotte, North Carolina RECEIVEDIDENRIDWR
NPDES Permit Number NC000089656 JUL 2 5 2018
Wood Project: 6228-18-0496
Water Resources
Dear Ms. Thredford: Permitting Section
On behalf of DC Charlotte Plaza, LLLP, Wood Environment & Infrastructure Solutions, Inc.
(Wood) is pleased to provide this letter outlining proposed major modifications to the
National Pollutant Discharge Elimination System (NPDES) permit for the subject
development currently under construction.
The property owner (DC Charlotte Plaza, LLLP) holds a NPDES Permit (Number
NC00089656) to treat and discharge water at the subject property in Charlotte, North
Carolina. Due to space constraints within the room that will house the permanent water
treatment system, it was reportedly necessary to modify the water treatment system
designed by others to include two larger carbon vessels rather than the four smaller
vessels as approved in the original permit application. The North Carolina Department of
Environmental Quality (NCDEQ) reviewed information previously provided and requested
preparation of a letter summarizing the proposed modifications signed and sealed by a
Professional Engineer. This information was requested to be submitted as a major
modification to the Permit. •
Wood Environment&Infrastructure Solutions,Inc
2801 Yorkmont Road,Suite 100
Charlotte,North Carolina 28208
Licensures:NC Engineering F-1253,Geology C-247
T:704-357-8600
www.woodplc.com

According to the NPDES permit, DC Charlotte Plaza, LLLP is authorized to operate a
0.108 MGD dewatering and groundwater remediation system consisting of, but not limited
to:
o a sub-slab dewatering drainage system draining to two sumps
o sump pumps
o four 1,000-pound activated carbon vessels
o a bag filter
o flow totalizer
o an effluent sample port
A portion of the design drawings related to the activated carbon vessels and previously
approved by the Water Quality Permitting Section are included as Attachment A.
A modification to the originally-permitted system is necessary because the floor area of
the room that will house the permanent water treatment system is inadequate for the four
1,000-pound activated carbon vessels. Therefore, two 2,000-pound activated carbon
vessels will be installed as part of the permanent system. According to the designer of the
system, the performance criteria of the originally-proposed four 1,000-pound activated
carbon vessels will be met by the modified two 2,000-pound activated carbon vessels.
A NPDES Permit Application - Short Form C-GW, completed by the permittee is included
as Attachment B. A revised design reflecting the modification to two 2,000-pound
activated carbon vessels is included as Attachment,C.
Closing
If you have questions, please contact the undersigned at your convenience.
Sincerely,
`,01111////
•%•%a R //
01llr/ij//i
Wood Environment &Infrastructure Solutions, Inc. �oi CBv- �y
l f: 3tht-L-52g—
ix SEAL 1; .1 —
Robert C. Foster, LG Hunter Hicks, Z9e°1
4.
Associate Geologist Office Manager °1.1Y'•••G,�•`.
��i� i .NSC `,
Attachments
Cc: Mr. Derek C. Denard, Environmental Specialist, NCDEQ, Water Quality Permitting
Section-NPDES

ATTACHMENT A

1
. .
..Therici-aciiiiiv PRO ID) UCT DA7A SHEE-
z I SERIES F CERS
FNiticatiukaiiMODEL AF-1000
The AF-1000 filter is a media filter vessel designed to treat liquid streams.
While the typical design application is a activated carbon adsorbtion unit,
7`,
the filter can easily accommodate many medias. Some applications
include:
• Dissolved Organic Removal (Activated Carbon)
• Suspended Solids Removal (Sand Filter)
• Dissolved Minerals (Softener Resin)
• Oil and Grease Removal (Organo-Clays)
• Dissolved and Precipitated Metals Removal
• Special Organics (Resin/Carbon Blend)
• Catalytic Reactor(Chlorine and Peroxide Removal) 4r
• Bio-Remediation Contactor Unit a
1
PRESSURE DROP GRAPH Ire
18"Access Hatch
(As Filled-8*30 GAG)
7iiiii- (7-----. . . .---. ------.\\,
6
C9
'
Inlet e e
7)117/
a s- �o
_ ..:71
O 4'
2
=
`• 3-
7
CA
( 2
2
a` Inlet/Outlet
1-
0
0 10 20 30 40 50 60 70
Outlet
Flow Rate(GPM)
AF-1000 SPECIFICATIONS
Overall Height 6'2" Vessel/Internal Piping Materials CS (SA-36)/SCH 40 PVC
Diameter 36" Internal Coating Polyamide Epoxy Resin
Inlet/Outlet(FNPT) 2" External Coating Epoxy Mastic
Drain /Vent (FNPT) OPT/ 1/4" Maximum Pressure/Temp 40 PSIG / 140° F
GAC Fill (lbs) 1,000 Cross Sectional Bed Area 7 FT2
Shipping /Operational Weight (lbs) 1,500/3,100 Bed Depth/Volume 5 FT/33 FT3
Tetrasolv Filtration
1200 East 26`x' Street-Anderson, Indiana 46016 U.S.A
Phone[phone] Fax[phone] Email: [e-mail]
Revised Feb 2004
l _

ATTACHMENT B

NPDES PERMIT APPLICATION - SHORT FORM C - GW
For discharges associated with groundwater treatment facilities.
Mail the complete application to:
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number NC000089656
If you are completing this form in computer use the TAB key or the up - down arrows to move from one
field to the next. To check the boxes, click your mouse on top of the box. Otherwise,please print or type.
1. Contact Information:
Owner Name DC Charlotte Plaza, LLLP
Facility Name Dimensional Place
Mailing Address 3344 Peachtree Road, Suite 1800
City Atlanta
State / Zip Code Georgia, 30326
Telephone Number [phone]
Fax Number ( )
e-mail Address [e-mail]
2. Location of facility producing discharge:
Check here if same as above 0
Street Address or State Road 1515 South Tryon Street
City Charlotte
State / Zip Code North Carolina, 28203
County Mecklenburg
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the
Operator in Responsible Charge or ORC)
Name Holder Construction Company
Mailing Address 202 W. Park Avenue
City Charlotte
State / Zip Code North Carolina, 28203
Telephone Number [phone]
Fax Number ( )
4. Ownership Status:
Federal ❑ State ❑ Private ® Public ❑
Page 1 of 3 C-GW 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - GW
For discharges associated with groundwater treatment facilities.
5. Products recovered:
Gasoline ❑ Diesel fuel ❑ Solvents ® Other Standard Metals
6. Number of separate discharge points: 1
Outfall Identification number(s) 001
7. Frequency of discharge: Continuous ® Intermittent ❑
If intermittent:
Days per week discharge occurs: Duration:
8. Treatment System Design flow 0.108 MGD
9. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Irwin Creek
10. Please list all additives to the treatment system, including chemicals or nutrients, that have
the potential to be discharged.
11. Is this facility located on Indian country? (check one)
Yes ❑ No
12. Additional Information
All applicants (including renewals):
➢ A USGS topographical map (or copy of the relevant portion) which shows all outfalls
➢ A summary of the most recent analytical results (effluent data, if available) containing the
maximum values for each chemical detected
NEW Applicants only:
➢ Engineering Alternative Analysis
➢ Description of remediation treatment system components, capacities, and removal efficiency
for detected compounds.
➢ If the treatment system will discharge to a storm sewer, written approval from the
municipality responsible for the sewer.
➢ A list of any chemicals found in detectable amounts at the site, with the maximum observed
concentration reported for each chemical (the most recent sample must be collected less
than one year prior to the date of this application)
➢ For petroleum-contaminated sites—Analyses for Volatile Organic Compounds (VOC) should
be performed. Analyses for any fuel additives likely to be present at the site and for phenol
and lead should also be performed.
➢ For sites contaminated with solvents or other contaminants - EPA Method 624/625
analysis should be performed.
Page 2 of 3 C-GW 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - GW
For discharges associated with groundwater treatment facilities.
13. Applicant Certification
I certify that I am familiar with the information contained in the application and that to the
best of my knowledge and belief such information is,true, complete, and accurate.
gsor roS 4 V kc( 2r5% � e,��
Printed name of Person Signing Title
Sig ture pplic t Date
North Carolina General Statute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false
statement representation, or certification in any application, record, report, plan, or other document files or
required to be maintained under Article 21 or regulations of the Environmental Management Commission
implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or
monitoring device or method required to be operated or maintained under Article 21 or regulations of the
Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable
by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section
1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both,
for a similar offense.)
Page 3 of 3 C-GW 03/05

ATTACHMENT C
1

B
NOTE: AS BUILT ego Hilo
<o ul1.ALL PIPING SHALL BE 2"SCH.80 PVC. O-8. WI
e 1
a
Y
h
C
N
E
il bi
a
Ili �� iii2"FLUSH o
TO DRAIN O 3
c a C
Nil
�. E o
—i' A 1 4-Ag
2"FLUSH TO DRAIN -----c- ` w
1 'L2_.'
t 2"PRETREATED ��— � L.---)� .r GROUNDWATER TO W S X
, _ 9 `°'�°""�" " 1 ISTERN < Q
2"PRETREATED a �.'"""rte,,, � ' € 3
GROUNDWATER .�-�. ,e 21 \ i
TO CISTERN � ., "
r
�l `` x
,"., A `s/" v (` AMPLE PORT
SAMPLE PORT , .d c
�-
Wm-
fN +
Ilitcv BEM-1
o
• •.-7 ' r"CITY WATER x-4.Z q3+
---7 z ' . ACKFLUSH SUPPLY E"-xo 3 ca
�y ', zl "FROM DEWATERING PUMPS o`$a...
d
SAMPLE POR <O o
Q a a c
FM-1
O3D View Front 2 0 3D View ReareQ , , C
s
ft
heir
i o g 4
9
> 2a
s � w % �
<
a8mo

E31
AS BUILT W .
I
Z gFggp�
li
2"FROM s2oIF
o yea
DEWATERING SAMPLE PORTS o ga R x
PUMPS 0'_2" 2"FLUSIMMIIMANIIIMMEMMiliiiH
uPsa l
TO r N
L�' l� � �� \ ? DRAIN _ a
1—ill i�It�I1i1I1111"111111!il i�al�. ��`e ��`•• ,q w
"� i �i R'T i 2"PRETREATED I 40-
11,4110
■ • I�IIII( I��1�!�•�•� ■ 11
GROUNDWATER
1'=\• 711 ::_ 4 �+ 1 - I�III�-1 TO CISTERNo E12
i .W )" '1mg �. �I"—,'_..,la .i 1 (LOW) O a
CL `
2"CITY
BACKFLUSH 0 O 2"FLUSH TO : —s_ a
o3
SUPPLY DRAIN(HIGH) MF-2 I + MF-1 v
r p 1 Q o 7R 2"PRETREATED E 2
- GROUNDWATER 1 p 0
MF-2 MF-1 ly TO CISTERN
W
2"CITY WATER O
_I Ili BACKFLUSH _
�1 SUPPLY o : N
2"FROM 8 $ O
�' �' DEWATERING o n w o- _o al W < iv-Q
PUMPS of o_ o
tL d � d � r a 1 t it 1 ,
RIGGING POINT
RIGGING POINT x
O1/2"
TOP VIEW O Rear Elevation ?
1/2"=1'-0" 1/2"=1'-0"
o M
2"FLUSH i__- � 1 _- x
TO DRAIN 1 1 �'� '�'�� E Q
--_. c� L. -- - , acv
�.�a __ v�.aI. N a o
SAMPLE PORT \ �j`� eo-'� \I 1101•111j II U o +
1
1 M.,10� �.,1 . _ x,p
..
33
BYPASS _ o
-1- MF-2 0�a�o.
2"PRETREATED ° i_ Q Q o
GROUNDWATER MF-1 liI '"',"'
_ I BFM-1 <a r~
TO CISTERN I_P -I\ I 1 I I
2"CITY �o 0 0 o f \
=I 4�•a )_ _+ ,--I� �- �' " BACKFLUSH
0000
■I F.I II JI■ F Ill�li<iI I. SUPPLY qqqq ,w
_✓I__ i_.l ►/_I 2L'pr4 I s
i c <
b ElIuu ( I — 2"FROM DEWATERING PUMPS L r a
r—lite\ � aa
9 LI
o ' . FM-1 = S � i
J/1 10 2" W W ❑
RIGGING POINT c. L 1
LOCATIONS(TYP.2 EACH SAMPLE PORT _ _
Stu
LONG SIDE) a gi o
OFront Elevation
3 1/2"=1'-0" n . h Z
.
-
`

e
t_r
' Carbon Vessel 2-A Carbon Vessel 2-B
\\N: Vacuum
Isisksbn\N
Breaker
'N\ \\N„
WIPP , ,V
Bag Filter
f
To Discharge
Carbon Vessel 1-A Carbon Vessel 1-B
I
\\N:4\. 1\\\i\sil
I. RIP X
'E'
LL I- 3(1