NCG140266_Representative Outfall Status Request_20210225

McCoy, Suzanne
From: Devan Hailey <[e-mail]>
Sent: Friday, February 26, 2021 1:42 PM
To: McCoy, Suzanne
Cc: Andy Rodak
Subject: [External] Representative Outfall Status - Thomas Concrete Morrisville Facility
Attachments: ROS Request Cover Letter-21134.pdf, ROS Request Form - SIGNED.pdf, Site Map -
Morrisville Plant 2020.pdf, 2020 Annual Report - Stormwater - Morrisville.pdf
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Suzanne —
Attached to this email are the supporting documents for requesting a change in representative outfall status. These are
also being physically mailed in to the Raleigh regional office. If you have any questions, please don't hesitate to reach
out. Thanks!
Devan G. Hailey, E.I.T.*
Staff Engineer
511 Keisler Drive, Suite 102
Cary, North Carolina 27518
Main: 919.858.9898
Mobile: [phone]
Email: dhailev(@svnterracorD.com
www.svnterracorD.com
SynTerra, as always, is focused on the safety of our employees, clients, and communities. As our communities
reopen, we continue to monitor COVID-19 numbers. SynTerra has developed a three-phase return -to -office
plan. While we implement the plan, we remain flexible. Technology enables us to continue operations,
collaborate freely, and provide the same responsive service our clients deserve. For more information about
our new safety precautions and return -to -office plan, click here.
* Registered in NC, SC, MD, VA, and GA
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1

ANNUAL SUMMARY DISCHARGE MONITORING
REPORT (DMR) — STORMWATER
SUBMIT TO CENTRAL OFFICE*
General Permit No. NCG140000
Calendar Year 2020
*Report ALL STORMWATER monitoring data on this form (include "No Flow"/"No Discharge" and Benchmark
Exceedances) from the previous calendar year to the DEQ by MARCH 1 of each year.
Certificate of Coverage No. NCG140266
Facility Name: Thomas Concrete of Carolina — Morrisville Plant
County: Wake
Phone Number: [phone] Total no. of SDOs monitored 3
Certified Laboratory ESC - Pace Analytical Lab # ENV 375
Lab #
Stormwater Discharge Outfall (SDO) No. 001 VMA Outfall? Yes ❑ No ❑
Is this outfall currently in Tier 2 for any parameter? Yes ❑ No
Was this outfall ever in Tier 2 during the past year? Yes ❑ No
If this outfall was in Tier 2 last year, was monthly monitoring discontinued?
Yes, enough consecutive samples below benchmarks to decrease frequency ❑
Yes, received approval from DEMLR to reduce monitoring frequency ❑
Other ❑
Non -polar O&G
Total
(EPA Method
New Motor Oil
Outfall No.
Total Rainfall,
Suspended
pH,
1664 SGT-HEM ,
( ))
Usage (gal/mo.)
1
1
inches
SolidsTSS
( ) ,
SU
mg/I (VMA)
If applicable
m g/I
If applicable
Stormwater
Indicate NO FLOW if
Circle Benchmark
100/50
6.0-9.0
15
>55 gal/mo. average requires TSS and
Benchmarks
applicable
Non -polar O&G monitoring
Date Sample
Collected,
mo/dd/yr
01/31/20
NO FLOW
02/06/20
2.6
9.2
6.30
<5.21
N/A
03/23/20
0.32
148
5.93
<0.725
>55
04/30/20
0.15
54
7.55
U
>55
05/19/20
0.32
9.8
6.96
3.02
>55
06/17/20
0.5
2.56
7.38
<1.29
>55
07/31/20
NO FLOW
08/31/20
NO FLOW
09/09/20
0.24
3.6
7.56
U
>55
10/31/20
NO FLOW
11/12/20
0.75
42.4
6.30
U
>55
12/14/20
0.32
12.2
6.57
U
>55
Permit Date 8/1/2017 — 6/30/2022
Last Revised 8-22-2015

Certificate of Coverage No. NCG140266
Additional Outfall Attachment (make copies as needed for additional outfalls)
Stormwater Discharge Outfall (SDO) No. No. 002 VMA Outfall? Yes ® No ❑
Is this outfall currently in Tier 2 for any parameter? Yes ® No ❑
Was this outfall ever in Tier 2 during the past year? Yes ® No ❑
If this outfall was in Tier 2 last year, was monthly monitoring discontinued?
Yes, enough consecutive samples below benchmarks to decrease frequency ❑
Yes, received approval from DEMLR to reduce monitoring frequency ❑
Other ❑
Outfall No.
2
2
Total Rainfall,
inches
Total
Suspended
Solids TSS,
( )
m /I
pH,
SU
Non -polar O&G
(EPA Method
1664 SGT-HEM ,
( ))
mg/I (VMA)
If applicable
New Motor Oil
Usage (gal/mo.)
If applicable
Stormwater
Benchmarks
Indicate NO FLOW if
applicable
Circle Benchmark
100/50
60-90
..
15
>55 gal/mo. average requires TSS and
Non -polar O&G monitoring
Date Sample
Collected,
mo/dd/yr
01/31/20
NO FLOW
02/06/20
2.6
74.8
11.98
<5.15
>55
03/31/20
NO FLOW
04/30/20
NO FLOW
05/31/20
NO FLOW
06/30/20
NO FLOW
07/31/20
NO FLOW
08/31/20
NO FLOW
09/30/20
NO FLOW
10/31/20
NO FLOW
11/30/20
NO FLOW
12/31/20
NO FLOW
Permit Date 8/1/2017 — 6/30/2022
Last Revised 8-22-2015

Certificate of Coverage No. NCG140266
Additional Outfall Attachment (make copies as needed for additional outfalls)
Stormwater Discharge Outfall (SDO) No. No. 003 VMA Outfall? Yes ❑ No
Is this outfall currently in Tier 2 for any parameter? Yes ® No ❑
Was this outfall ever in Tier 2 during the past year? Yes ® No ❑
If this outfall was in Tier 2 last year, was monthly monitoring discontinued?
Yes, enough consecutive samples below benchmarks to decrease frequency ❑
Yes, received approval from DEMLR to reduce monitoring frequency ❑
Other ❑
Outfall No.
3
Total Rainfall,
inches
Total
Suspended
o
Solids (TSS),
m /I
pH,
SU
Non -polar O&G
(EPA Method
1664 (SGT-HEM)),
mg/I (VMA)
New Motor Oil
Usage (gal/mo.)
Stormwater
Benchmarks
Indicate NO FLOW if
applicable
Circle Benchmark
100/50
60-90
..
15
>55 gal/mo. average requires TSS and
Non -polar O&G monitoring
Date Sample
Collected,
mo/dd/yr
01/31/20
NO FLOW
02/06/20
2.6
146
8.88
<5.1
N/A
03/23/20
0.32
276
8.84
N/A
N/A
04/30/20
0.15
72
8.48
N/A
N/A
05/19/20
0.32
65.7
8.47
N/A
N/A
06/17/20
0.5
66.7
11.29
N/A
N/A
07/31/20
NO FLOW
08/31/20
NO FLOW
09/09/20
0.24
2.2
9.79
N/A
N/A
10/31/20
NO FLOW
11/12/20
0.75
1040
9.69
N/A
N/A
12/14/20
0.32
199
9.11
N/A
N/A
Permit Date 8/1/2017 — 6/30/2022
Last Revised 8-22-2015

Certificate of Coverage No. NCG140266
CERTIFICATION
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
[Required by 40 CFR §122.22]
Signature
Date
Mail Annual Summary Stormwater DMR to the NCDEQ Central Office:
Note the address is correct — Central Files is housed in DWR (not DEMLR)
N.C. Department of Environmental Quality (DEQ)
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Central Files Telephone [phone]
Questions? Contact DEMLR Stormwater Permitting Staff in the Central Office at:
[phone]
Permit Date 8/1/2017 — 6/30/2022
Last Revised 8-22-2015

IDDUNCKI F
& DUNHAM
is now
Terra
February 25, 2021
Science & Engineering Consultants
511 Keisler Dr # 102, Cary, NC 27518 1919,858.9898
Mr. William Denton
Regional Engineer
North Carolina Division of Energy, Minerals and Land Resources
3800 Barrett Drive
Raleigh, North Carolina 27609
SUBJECT: Representative Outfall Status Request
Thomas Concrete, Inc.
220 International Drive
Morrisville, Wake County, NC
Permit No. NCG140266
Mr. Denton:
SynTerra Corporation (Synterra), on behalf of Thomas Concrete, Inc., submits this
request for Representative Outfall Status (ROS)at their Morrisville, North Carolina
facility. The facility operates under NPDES General Permit NCG140266.
Stormwater runoff from areas of industrial activity previously discharged through three
outfalls at the site: 001, 002, and 003. Outfall 001 discharges runoff collected in Drainage
Area 1 on the southern portion of the site, Outfall 002 discharges stormwater runoff
and wastewater from Drainage Areas 3 and 4 in the central portion of the site
(stormwater runoff and wastewater collected in the settling and recycling pits that is not
re -used in the batch treatment process), and Outfall 003 discharges stormwater runoff
from Drainage Area 2 on the northern portion of the site (see attached Site Map).
As the result of damage to outfall 002 and the construction of a wastewater treatment
system at the site, the has been closed off and the stormwater and wastewater runoff
that previously discharged through outfall 002 is now routed to outfall 001 through the
wastewater treatment system. Stormwater and wastewater runoff that accumulate in
the recycle pit and are not reused in the batch concrete process are pumped through the
wastewater treatment system. Wastewater and stormwater pumped to the treatment
system are treated through the processes of equalization, physical settlement and pH
neutralization and discharge through gravity flow into Outfall 001.
synterracorp.com

Representative Outfall Status Request
Thomas Concrete -Morrisville
February 25, 2021
Page 2
Based on the re -orientation of flow previously through Outfall 002 to Outfall 001,
SynTerra requests that Outfall 001 be considered representative of Outfalls 001 and 002.
Stormwater and wastewater monitoring will be conducted in Outfall 001, and
stormwater monitoring only will be conduced in Outfall 003 (consistent with the
current monitoring protocol).
Attached to this letter is a signed ROS Request Form (SWU-ROS-2009), two copies of a
site map, and the 2020 annual stormwater discharge outfall monitoring report for all
outfalls at the site to support this request. Please contact us at [phone] or
[e-mail] if you have any questions of need more information to
support this request.
All the best,
SynTerra
Gax_',,Z__
Andrew Rodak, P.E.
Senior Engineer
Cc: Jason Blyth, Thomas Concrete
File
Attachment/s: ROS Request Form
Site Map
Annual SDO Report
synterracorp.com
P:\Thomas Con crete\ECAP-20212898\TC-MV REPRESENTATIVE OUTFALL STATUS\ROS Request Cover Letter-21134.docx

Division of Energy, Mineral & Land Resources
Stormwater Program
National Pollutant Discharge Elimination System
Environmental REPRESENTATIVE OUTFALL STATUS (ROS)
nijnlity
FOR AGENCY USE ONLY
Date Received
Year
Month
Dny
' KLQUI:'.)l kOHM
If a facility is required to sample multiple discharge locations with very similar stormwater discharges, the
permittee may petition the Director for Representative Outfall Status (ROS). DEQ may grant Representative
Outfall Status if Stormwater discharges from a single outfall are representative of discharges from multiple
outfalls. Approved ROS will reduce the number of outfalls where analytical sampling requirements apply.
If Representative Outfall Status is granted, ALL outfalls are still subject to the qualitative monitoring
requirements of the facility's permit —unless otherwise allowed by the permit (such as NCG020000) and DEQ
approval. The approval letter from DEQ must be kept on site with the facility's Stormwa ter Pollution
Prevention Plan. The facility must notify DEQ in writing if any changes affect representative status.
For questions, please contact the DEQ Regional Office for your area (see page 3).
(Please print or type)
1) Enter the permit number to which this ROS request applies:
Individual Permit (or) Certificate of Coverage
N I c I s N C G 11 4 10 2 16 6
2) Facility Information:
Owner/Facility Name Thomas concrete, Inc. -Morrisville Plant
Facility Contact
Street Address
City
County
Telephone No.
Conte Hargrove
220 International Dr
Morrisville
Wake
[phone]
State NC
E-mail Address
Fax:
ZIP Cade 27560
donte,[e-mail]
3) List the representative outfalls) information (attach additional sheets if necessary):
Outfall(s) 001 is representative of Outfall(s) 001 and 002
Outfalls' drainage areas have the same or similar activities?
oc Yes
❑ No
Outfalls' drainage areas contain the same or similar materials?
a Yes
❑ No
Outfalls have similar monitoring results?
❑ Yes
❑ No li No data*
Outfall(s) is representative of Outfall(s)
Outfalls' drainage areas have the same or similar activities?
❑ Yes
❑ No
Outfalls' drainage areas contain the same or similar materials?
❑ Yes
❑ No
Outfalls have similar monitoring results?
❑ Yes
❑ No ❑ No data*
Outfall(s) is representative of Outfall(s)
Outfalls' drainage areas have the same or similar activities?
❑ Yes
❑ No
Outfalls' drainage areas contain the same or similar materials?
❑ Yes
❑ No
Outfalls have similar monitoring results?
❑ Yes
❑ No ❑ No data*
*Non-compliance with analytical monitoring prior to this request may prevent ROS approval. Specific
circumstances will be considered by the Regional Office responsible for review.
Page 1 of 3
SWU-ROS-2009 Last revised 12/30/2009

Representative Outfall Status Request
4) Detailed explanation about why the outfalls above should be granted Representative Status:
(Or, attach a letter or narrative to discuss this information.) For example, describe how activities and/or
materials are similar.
Outfai1 002 has been closed off and the stormwaterlwastewater runoff that previously flowed through Outfall 002 Is now being directed through
a wastewater treatment system that discharges through Ouffall 001.
5) Certification:
North Carolina General Statute 143-215.6 B(i) provides that:
Any person who knowingly makes any false statement, representation, or certification in any application, record,
report, plan, or other document filed or required to be maintained under this Article or a rule implementing this
Article; or who knowingly makes a false statement of a material fact in a rulemaking proceeding or contested case
under this Article; or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device
or method required to be operated or maintained under this Article or rules of the [Environmental Management]
Commission implementing this Article shall be guilty of a Class 2 misdemeanor which may include a fine not to exceed
ten thousand dollars ($10,000).
I hereby request Representative Outfall Status for my NPDES Permit. I understand that ALL outfalls are still
subject to the qualitative monitoring requirements of the permit, unless otherwise allowed by the permit
and regional office approval. I must notify DEQ in writing if any changes to the facility or its operations
take place after ROS is granted that may affect this status. If ROS no longer applies, I understand I must
resume monitoring of all outfalls as specified in my NPDES permit.
certify that I am familiar with the information contained in this application and that to the best of my
knowledge and belief such information is true, complete, and accurate.
Printed Name of Person Signing
Title: General nager
Jason 61yth
(Signat{ar of Appficant) V (Da e Signed)
Please not : This application for Representative Outfall Status is subject to
approval y the NCDEQ Regional Office. The Regional Office may inspect your
facility fo compliance with the conditions of the permit prior to that approval.
Final_ Checklist for ROS Request
This application should include the following items:
❑ This completed form.
❑ Letter or narrative elaborating on the reasons why specified outfalls should be granted representative
status, unless all information can be included in Question 4.
❑ Two (2) copies of a site map of the facility with the location of all outfalls clearly marked, including the
drainage areas, industrial activities, and raw materials/finished products within each drainage area.
❑ Summary of results from monitoring conducted at the outfalls listed in Question 3.
❑ Any other supporting documentation.
Page 2of3
5WU-ROS-2009 Last revised 12t3012009

Representative Outfall Status Request
Mail the entire package to:
NCDEQ DEMLR at the appropriate Regional Office (See map and
addresses below)
Notes
The submission of this document does not guarantee Representative Outfall Status (ROS) will be granted as
requested. Analytical monitoring as per your current permit must be continued, at all outfalls, until written
approval of this request is granted by DEQ. Non-compliance with analytical monitoring prior to this request
may prevent ROS approval. Specific circumstances will be considered by the Regional Office responsible for
review.
For questions, please contact the DEQ Regional Office for your area.
Asheville Regional Office
2090 U.S. Highway 70
Swannanoa, NC 28778
Washington Regional Office
943 Washington Square Mall
Phone [phone]
Washington, NC 27889
FAX [phone]
Phone [phone]
Fayetteville Regional Office
FAX [phone]
Systel Building,
225 Green St., Suite 714
Wilmington Regional Office
Fayetteville, NC 28301-5094
127 Cardinal Drive Extension
Wilmington, NC 28405
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
Mooresville Regional Office
610 East Center Ave.
Winston-Salem Regional Office
Mooresville, NC 28115
585 Waughtown Street
Winston-Salem, NC 27107
Phone [phone]
Phone [phone]
FAX [phone]
Water Quality Main FAX [phone]
Raleigh Regional Office
Central Office
1628 Mail Service Center
1612 Mail Service Center
Raleigh, NC 27699-1628
Raleigh, NC 27699-1612
Phone [phone]
Phone [phone]
FAX [phone]
FAX [phone]
Page 3 of 3
SWU-ROS-2009 Last revised 12/30t2009

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UPDATED BY RODAK ENGINEERING ON
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THIS DRAWING IS PART OF A REPORT
AND SHOULD ONLY BE USED IN CONJUNCTION WITH THE WRITTEN REPORT
G63 —9046 E COPYRIGHT 2006
FROEHLING & ROBERTSON, INC.
ALL RIGHTS RESERVED