NC0090085_More Information (Received)_20220622

6/22/22, 4:42 PM Mail - Denard, Derek - Outlook
RE: [External] RE: Request for Additional Information - NPDES application NC0090085 -
MOD CLT Venture LLC - Radius Dilworth Overlook
Frazier, William 0 <[e-mail]>
6/22/2022 10:54
To: Denard, Derek <[e-mail]>
Cc: Hennessy, John <[e-mail]>;Dowden, Doug <[e-mail]>;McElveen,
Neal <[e-mail] >;Mary Katherine Stukes <[e-mail]>;Laura
Boorman Truesdale <[e-mail]>
0 1 attachments (167 KB)
Table 1_Historical GW Analytical Results_Red Carpet Inn_NPDES Permit Application.pdf;
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Morning Derek,
Please see our responses in red below. Please let us know if you need anything else.
Thanks,
Will
Will Frazier, P.G.
Licensed in NC
Project Geologist
Iirerracon
2701 Westport Road I Charlotte, North Carolina 28208
P [phone] I F [phone] I M [phone]
will.frazierPterracon.com I Terracon.com
From: Denard, Derek <[e-mail]>
Sent: Wednesday, June 15, 2022 5:01 PM
To: Frazier, William 0 <[e-mail]>
Cc: Hennessy, John <[e-mail]>; Dowden, Doug <[e-mail]>
Subject: Re: [External] RE: Request for Additional Information - NPDES application NC0090085 - MOD CLT Venture
LLC - Radius Dilworth Overlook
Will,
https://outlook.office365.com/mail/inbox/id/AAQkADdhYTVmZDBILTESZDctNGI5MC04ZjliLWU4MjVhZTBhMmJkMgAQANvJHvZ7ftZPm98g0%2BmTF... 1/7

6/22/22, 4:42 PM Mail - Denard, Derek - Outlook
The EAA was approved Friday, June 10th. I am currently reviewing the groundwater data and drafting
the permit.
I am struggling with the data set.
• The groundwater data summary included an analyte "IPE" in Table 1. A search on PubChem
returned 2-(Isopropylamino)ethanol, which is not common to any pollutant scan that I know of.
Was this a type-o for DIPE (Diisopropyl ether)?
The chemical in question is diisopropyl ether. The first historical lab report listed the compound as IPE,
and that acronym got carried over from that. But IPE and DIPE refer to the same compound and are used
interchangeably. I don't know why there are two seemingly contradictory names for that compound, but
I'm no organic chemist.
• For Lead in Table 1 there are two values that seem unusual: MW-6 (3/1/1996) 0.0093J µg/L and
MW-7 (3/1/1996) 0.0089J µg/L. I haven't seen Lead data reported down to the ng/L level before.
Were the units reported as mg/L on the original lab reports instead?
I reviewed the prior historical report these data were taken from. You are correct that the unit listed for
lead was mg/L. The two concentrations should read as 9.3 ug/L and 8.9 ug/L, respectively. I have revised
Table 1 accordingly; please see attached.
• Also do you have the PQLs for the no detects "ND" in Table 1? The PQL would be the same as the
"report limit" instead of the MDL.
The revised Table 1 also includes the limits from the historical lab reports.
Thanks,
Derek C. Denard
Environmental Program Consultant
N.C. Division of Water Resources
N.C. Department of Environmental Quality
919 707 3618 office
919 707 9000 main DWR
[e-mail]
Water Quality Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Frazier, William 0 <[e-mail]>
Sent: Wednesday, June 15, 2022 4:24 PM
To: Denard, Derek <[e-mail]>
Cc: Mary Katherine Stukes<[e-mail]>; Laura Boorman Truesdale
<lauratruesdalejmvalaw.com>
Subject: RE: [External] RE: Request for Additional Information - NPDES application NC0090085 - MOD CLT Venture
LLC - Radius Dilworth Overlook
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6/22/22, 4:42 PM Mail - Denard, Derek - Outlook
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Afternoon Derek,
May we please have another status update on this permit application? Are we still on track to enter the public
notice period here shortly?
Thanks,
Will
Will Frazier, P.G.
Licensed in NC
Project Geologist
� Nerracon
2701 Westport Road I Charlotte, North Carolina 28208
P [phone] I F [phone] I M [phone]
[e-mail] I Terracon.com
From: Denard, Derek <[e-mail]>
Sent: Wednesday, May 11, 2022 10:12 AM
To: Frazier, William 0 <[e-mail]>
Subject: Re: [External] RE: Request for Additional Information - NPDES application NC0090085 - MOD CLT Venture
LLC - Radius Dilworth Overlook
Hopefully by June.
Derek
Derek Denard
Environmental Specialist
N.C. Division of Water Resources
N.C. Department of Environmental Quality
919 707 3618 office
919 707 9000 main DWR
[e-mail]
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6/22/22, 4:42 PM Mail - Denard, Derek - Outlook
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Frazier, William 0 <[e-mail]>
Sent: Tuesday, May 10, 2022 4:45 PM
To: Denard, Derek <[e-mail]>
Subject: RE: [External] RE: Request for Additional Information - NPDES application NC0090085 - MOD CLT Venture
LLC - Radius Dilworth Overlook
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Much appreciated Derek. If possible, could you provide me with an idea of when your review is complete and the
public notice period can begin?
Thanks,
Will
Will Frazier, P.G.
Licensed in NC
Project Geologist
1Terracon
2701 Westport Road I Charlotte, North Carolina 28208
P [phone] I F [phone] I M [phone]
[e-mail] I Terracon.com
From: Denard, Derek <[e-mail]>
Sent: Monday, May 9, 2022 11:32 AM
To: Frazier, William 0 <[e-mail]>
Subject: Re: [External] RE: Request for Additional Information - NPDES application NC0090085 - MOD CLT Venture
LLC - Radius Dilworth Overlook
Will,
I got your email last week and your message Friday. I took a quick look and believe it stratifies what what
is needed for the information request.
https://outlook.office365.com/mail/inbox/id/AAQkADdhYTVmZDBI LTE5ZDctNG15MCO4Zjh LWU4MjVhZTBhMmJkMgAQANvJHvZ7ftZPm98gO%2BmTF... 4/7

6/22/22, 4:42 PM Mail - Denard, Derek - Outlook
Thanks,
Derek Denard
Environmental Specialist
N.C. Division of Water Resources
N.C. Department of Environmental Quality
919 707 3618 office
919 707 9000 main DWR
derek.denard©ncdenr.gov
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Frazier, William 0 <[e-mail]>
Sent: Monday, May 2, 2022 8:21 AM
To: Denard, Derek <derek.denardjncdenr.gov>; Eric Spiewak<[e-mail]>; Ian Levine
<[e-mail]>; McElveen, Neal <[e-mail]>; Mary Katherine Stukes
<[e-mail]>
Cc: Hennessy, John <[e-mail]>; Watson, Edward M <[e-mail]>
Subject: [External] RE: Request for Additional Information - NPDES application NC0090085 - MOD CLT Venture LLC
- Radius Dilworth Overlook
rCAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Good morning Derek,
Please see the attached response providing the requested information and let us know if additional details are
necessary.
Thanks,
Will
Will Frazier, P.G.
Licensed in NC
Project Geologist
ierracon
https://outlook.office365.com/mail/inbox/id/AAQkADdhYTVmZDBI LTE5ZDctNG15MCO4Zjh LWU4MjVhZTBhMmJkMgAQANvJHvZ7ftZPm98gO%2BmTF... 5/7

6/22/22, 4:42 PM Mail - Denard, Derek - Outlook
2701 Westport Road I Charlotte, North Carolina 28208
P [phone] I F [phone] I M [phone]
[e-mail] I Terracon.com
From: Denard, Derek <[e-mail]>
Sent: Wednesday, April 27, 2022 2:42 PM
To: Eric Spiewak<[e-mail]>; Ian Levine<[e-mail]>;
McElveen, Neal <[e-mail]>; Frazier, William 0 <[e-mail]>; Mary
Katherine Stukes <[e-mail]>
Cc: Hennessy, John <[e-mail]>; Watson, Edward M <[e-mail]>
Subject: Request for Additional Information - NPDES application NC0090085 - MOD CLT Venture LLC - Radius
Dilworth Overlook
Mr. Spiewak:
Please find the attached Request for Additional Information for NPDES application NC0090085 - MOD
CLT Venture LLC - Radius Dilworth Overlook.
In order to provide more convenience, control, and security to our permittees and assist them in
processing their transactions, The Division of Water Resources is currently transitioning towards
electronic correspondence. This will hopefully provide more efficient service to our permittees and other
partners and will allow us to more effectively process and track documents. We are writing to ask you
for your approval of the transmittal of documents related to your permitting and related activities with
the Division in an electronic format. Documents will be emailed to the appropriate contact person(s) in
your organization in a PDF format.
Please respond to me through email with verification that transmittal of your documents in an electronic
manner is acceptable to you.
Please respond to this email confirming that you received the attached document(s), were able to open
and view the document(s) and have saved/printed a copy for your records.
If you have any questions, please feel free to contact me.
Sincerely,
Derek Denard
Environmental Specialist
N.C. Division of Water Resources
N.C. Department of Environmental Quality
919 707 3618 office
919 707 9000 main DWR
derek.denard©ncdenr.gov
1617 Mail Service Center
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6/22/22, 4:42 PM Mail - Denard, Derek - Outlook
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
Terracon provides environmental, facilities, geotechnical, and materials consulting engineering services delivered
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Table 2
Summary of Historical Groundwater Analytical Results
Red Carpet Inn Brownfields Site
Brownfields Site No. 23070-19-060
615 East Morehead Street
Charlotte, Mecklenburg County, North Carolina
Terracon Project No. 71197661
Sample ID:
Anelyte Sample Date:
MW-6
MW-7
MW-10
NCDEQ2L
6Standard
Gross
Contaminant Level
VI-GWSL
Residential
VI-GWSLNon-
Residential
2/1/1996 I 5/19/2000 I 1/2/2004 I 10/12/2005 I 1/26/2012 I 4/5/2012 I 1/17/2014 I 7/21/2014
3/1/1996 I 5/19/2000
3/22/1996 I 5/19/2000 I 6/30/2005
MADEP VPH
C5-C8 Aliphatics
NA
NA
8,700
20,000
NA
10,100
11,000
6,000
NA
NA
NA
NA
NA
400
NE
NE
NE
C9-C18 Aliphatics
NA
NA
1,100
7,800
NA
2,550
NA
1,300
NA
NA
NA
NA
NA
700
NE
NE
NE
C9-C22 Aromatics
NA
NA
5,500
8,100
NA
5,340
4,600
4,300
NA
NA
NA
NA
NA
200
NE
NE
NE
Volatile Organic Compounds by EPA Method 8260, 601/602 end/or 504-1
Benzene
1,800
600
280
170
38.6
NA
25
80
<0.48
<1
<0.48
<1
<0.2
1
5,000
16
69
Toluene
8,700
1,800
2,000
2,300
197
NA
240
1,300
<0.78
<1
<0.78
<1
<0.2
600
260,000
3,800
16,000
Ethylbenzene
2,400
1,100
1,100
1,600
402
NA
370
1,500
<0.68
<1
<0.68
<1
<0.2
600
84,500
35
150
Xylene
7,200
2,000
2,900
3,800
856
NA
1,090
5,700
<1.6
<3
<1.6
<3
0.591
500
85,500
77
320
MTBE
120
<50
<5
<8
<8
NA
<10
<12
2.8
<5
<1.4
<5
140
20
20,000
4,500
2,000
IPE
<50
340
<5
<8
<2
NA
<10
<12
<5
<5
<10
<5
NA
70
70,000
1,400
5,900
EDB
0.022
<0.02
<0.019
<0.0062
<2
NA
<10
<0.020
<0.02
<0.02
<0.02
<0.02
NA
0.02
50
1.8
7.7
Chloroform
<7 5
<10
NA
NA
<2
NA
<10
<12
<0.75
<1
<0.75
<1
NA
70
70,000
8.1
36
Trichloroethene
<8.3
<10
NA
NA
<2
NA
<10
<12
<0.83
<1
<0.83
<1
NA
3
3,000
1.0
4.4
Naphthalene
270
NA
NA
NA
210
NA
98
- 310
<2.2
NA
NA
NA
1.31
6
6,000
35
150
Isopropyl benzene
NA
NA
NA
NA
53.3
NA
45
73
NA
NA
NA
NA
NA
70
25,000
180
750
p-Isopropyltoluene
NA
NA
NA
NA
<2
NA
8.4
8.0
NA
NA
NA
NA
NA
25
11,700
NE
NE
2-Butanone
NA
NA
NA
NA
NA
NA
<100
<120
NA
NA
NA
NA
NA
4,000
4,000,000
950,000
1,900,000
n-Butylbenzene
NA
NA
NA
NA
<2
NA
43
20
NA
NA
NA
NA
NA
70
6,900
NE
NE
sec-Butylbenzene
NA
NA
NA
NA
<2
NA
14
12
NA
NA
NA
NA
NA
70
8,500
NE
NE
tert-Butylbenzene
NA
NA
NA
NA
<2
NA
<10
NA
NA
NA
NA
NA
NA
70
15,000
NE
NE
n-Prapylbenzene
NA
NA
NA
NA
86.7
NA
98
160
NA
NA
NA
NA
NA
70
30,000
490
2,000
1,2,4-Trimethylbenzene
NA
NA
NA
NA
NA
620
1,700
NA
NA
NA
NA
NA
400
28,500
50
210
1,3,5-Trimethylbenzene
NA
NA
NA
NA
NA
200
460
NA
NA
NA
NA
NA
400
25,000
35
150
Semi -Volatile Organic Compounds by EPA Method 8270
Bis(2-ethylhexyl)phthalate
<2.6
NA
NA
NA
NA
NA
NA
NA
4.3
NA
<4.1
NA
NA 3
170
NE
NE
Phenol
<1
NA
NA
NA
NA
NA
NA
NA
1.6
NA
<1
NA
NA 30
30,000
NE
NE
Lead by EPA Method 6010
Lead I 9.31 I <15 I <3 I NA I NA I <5 I 4.5 I <2 I 8.91 I <15 I <4 I <15 I NA I 15 I 15,000 I NE I NE
Notes:
Data obtained from the following prior reports prepared by others: CAW Engineering Comprehensive Site Assessment (1996), LAW Report of Groundwater Monitoring (2000); ECS Assessment of Petroleum Impacted Soils (2000); S&ME Soil and Groundwater Assessment Report (2004);
Schnabel Environmental Assessment (2004); Hart & Hickman Po -CAP Monitoring Plan (2014); and Hart & Hickmman Groundwater Monitoring Report (2014).
NA- Not Analyzed
ND - Not Detected above laboratory method detection limits
NE - Not Established
All results are shown in micrograms per liter (pg/l).
Only compounds detected in one or more sample are shown.
Detections are indicated in bold.
1- Estimated concentration between method detection limit and reporting limit.
Concentrations highlighted in yellow exceed their respective NCDEQ 2L groundwater standards (or Interim Maximum Contaminant Levels if a 21_ standard has not been established).
Concentrations highlighted in orange exceed their respective Gross Contaminant levels.
Concentrations shaded in green exceed their respective NCDEQ Residential Groundwater Screening levels for Vapor Intrusion (February 2018).
Concentrations shaded in blue exceed their respective NCDEQ Non -Residential Groundwater Screening levels for Vapor Intrusion (February 2018).
In cases where a concentration exceeds multiple standards, the shading for the exceedance of a vapor standard is given preference.

Table 2
Summary of Historical Groundwater Analytical Results
Red Carpet Inn Brownfields Site
Brownfields Site No. 23070-19-060
615 East Morehead Street
Charlotte, Mecklenburg County, North Carolina
Terracon Project No. 71197661
Semple ID:
Analyte
Sample Date:
MW-11
TW-1(P-2)'
TW-2 (P-10)
MW-2
MW-3
MW-4
HTTW-4
HTTW-5
NCDEQ2L
Groundwater
Standard
Gross
Contaminant Level
VI-GWSL
Residential
VI-GWSLNon-
Residential
10/5/2000
10/5/2000
10/5/2000
6/30/2005
6/30/2005
6/30/2005
1/22/2014
1/22/2014
MADEP VPH
NE
C5-C8Aliphatics
<100
3,700
6,200
NA
NA
NA
620
66
400
NE
NE
C9-C18Aliphatics
<100
26,000
42,000
NA
NA
NA
71
100
700
NE
NE
NE
C9-C22 Aromatics
<100
2,400
3,900
NA
NA
NA
720
75
200
NE
NE
NE
Volatile Organic Compounds by EPA Method 8260, 601/602, and/or 504-1
Benzene
<1
<1
16,000
190
1.2
<0.2
6.6
<0.5
1
5,000
16
69
Toluene
<1
<2
77,000
1,300
<1
0.261
0.82
<0.5
600
260,000
3,800
16,000
Ethylbenzene
<1
<1
25,000
1,800
<1
<0.2
4.3
<0.5
600
84,500
35
150
Xylene
<1
<1
121,000
7,400
<2
0.411
2
<1.5
500
85,500
77
320
MTBE
<1
<1
<1000
<4
<1
4.51
<0.5
1.9
20
20,000
4,500
2,000
IPE
<1
<1
<1000
NA
NA
NA
8.5
<0.5
70
70,000
1,400
5,900
EDB
NA
NA
NA
NA
NA
NA
<0.02
0.033
0.02
50
1.8
7.7
Chloroform
<1
5.3
<1000
NA
NA
NA
0.29
1.7
70
70,000
8.1
36
Trichloroethene
<1
<1
<1000
NA
NA
NA
<0.5
1.1
3
3,000
1.0
4.4
Naphthalene
NA
NA
NA
IIIIII30
2.9
<1
2.7
<2
6
6,000
35
150
Isopropylbenzene
NA
NA
NA
NA
NA
NA
<0.5
<0.5
70
25,000
180
750
p-Isopropyltoluene
NA
NA
NA
NA
NA
NA
<0.5
<0.5
25
11,700
NE
NE
2-Butanone
NA
NA
NA
NA
NA
NA
6.1
<5
4,000
4,000,000
450,000
1,900,000
n-Butylbenzene
NA
NA
NA
NA
NA
NA
2.9
<2
70
6,900
NE
NE
sec-Butylbenzene
NA
NA
NA
NA
NA
NA
3.5
<0.5
70
8,500
NE
NE
tert-Butylbenzene
NA
NA
NA
NA
NA
NA
0.3
<0.5
70
15,000
NE
NE
n-Propylbenzene
NA
NA
NA
NA
NA
NA
1.8
<0.5
70
30,000
490
2,000
1,2,4-Trimethylbenzene
NA
NA
NA
NA
NA
NA
1.5
<0.5
400
28,500
50
210
1,3,5-Trimethylbenzene
NA
NA
NA
NA
NA
NA
0.44
<0.5
400
25,000
35
150
Semi -Volatile Organic Compounds by EPA Method 8270
Bis(2-ethylhexyl)phthalate
NA
NA
NA
NA
NA
NA
NA
NA
3
170
NE
NE
Phenol
NA
NA
NA
NA
NA
NA
NA
NA
30
30,000
NE
NE
Lead by EPA Method 6010
Lead I NA I NA I NA I NA I NA I NA I 5.5 I 34 I 15 I 15,000 I NE IIIIII, NE
Notes:
Data obtained from the following prior reports prepared by others: LAW Engineering Comprehensive Site Assessment (1996); LAW Report of Groundwater Monitoring (2000); ECS Assessment of Petroleum Impacted Soils (2000); 5&ME Soil and Groundwater Assessment Report (2004);
Schnabel Environmental Assessment (2004); Hart & Hickman Pre -CAP Monitoring Plan (2014); and Hart & Hickmman Groundwater Monitoring Report (2014).
NA- Not Analyzed
ND - Not Detected above laboratory method detection limits
NE - Not Established
All results are shown in micrograms per liter (pg/l).
Only compounds detected in one or more sample are shown.
Detections are indicated in bold.
1- Estimated concentration between method detection limit and reporting limit.
Concentrations highlighted in yellow exceed their respective NCDEQ 2L groundwater standards (or Interim Maximum Contaminant Levels if a 21. standard has not been established).
Concentrations highlighted in orange exceed their respective Gross Contaminant Levels.
Concentrations shaded in green exceed their respective NCDEQ Residential Groundwater Screening levels for Vapor Intrusion (February 2018).
Concentrations shaded in blue exceed their respective NCDEQ Non -Residential Groundwater Screening Levels for Vapor Intrusion (February 2018).
In cases where a concentration exceeds multiple standards, the shading for the exceedance of a vapor standard is given preference.