NCG160246_2023 DMR_20230421

NCDEQ Division of Energy,Mineral and Land Resources
Stormwater Discharge Monitoring Report(DMR) Form for NCG160000
Asphalt Paving Mixtures and Blocks
Click here for instructions
Complete,sign,scan and submit the DMR via the Stormwater NPDES Permit Data Monitoring Report(DMR) Upload form within
30 days of receiving sampling results. Mail the original,signed hard copy of the DMR to the appropriate DEMLR Regional Office.
Certificate of Coverage No. NCG160246 Person Collecting Samples: Nicholas Murphrey
Facility Name:Carolina Sunrock- RDU Asphalt Laboratory Name:Eurofins
Facility County:Wake Laboratory Cert. No.:269
Discharge during this period: ✓❑Yes ❑ No (if no,skip to signature and date)
Has your facility implemented mandatory Tier response actions this sample period for any benchmark exceedances?❑✓ Yes ❑ No
If so,which Tier(I, II,or III)? 1
A copy of this DMR has been uploaded electronically via https://edocs.dea.nc.gov/Forms/SW-DMR ❑✓ Yes ❑ No
Date Uploaded:4/21/2023
Analytical Monitoring Requirements for Outfalls with Industrial Activities—Benchmarks in(Red)
Parameter Parameter Outfall Outfall Outfall Outfall Outfall
Code
N/A Receiving Stream Class B; NSW
N/A Date Sample Collected MM/DD/YYYY 03/02/2023
46529 24-Hour Rainfall in inches 0.72
C0530 TSS in mg/L(100 or 50*) 42.4
Additional parameters for outfalls in drainage areas that use>55 gallons per month of new hydraulic oil on average
00552 Non-Polar Oil&Grease in mg/L(15) <5.0
NCOIL Estimated New Motor/Hydraulic Oil -
Usage in gal/month
*Outfalls to Outstanding Resource Waters(ORW),High Quality Waters(HQW),Trout Waters(Tr)and Primary Nursery Areas(PNA)
have a benchmark TSS limit of 50 mg/L.All other water classifications have a benchmark of
Notes(optional):TSS of sample taken on March 2.2023 during a 0.72'rainfall event was tested to be 42.4 mg0 in exceedanca of the process water pennf limit.All other parameters were below the benchmark limes.The non-compliant sample can 0o attributed to runoff from upstre:
II certify by my signature below,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 e best of my knowledge and belief,true,accurate,and complete.I am aware that there are significant penalties for submitting
false informati4,n,including the possibility of fines and imprisonment for knowing violations."
4/21/2023
Signature o •e -, or Delegated Authorized Individual Date
Email Address [e-mail] Phone Number 9197476400

Carolina Sunrock—RDU Concrete eDMR NCG140251 and RDU Asphalt eDMR NCG160246 for WW
Sample Taken Q1 2023 at Stormwater Pond Outfall 001
Action Plan to Reduce TSS Below Benchmark Limits in NPDES General Stormwater Permit(both plants
drain to this outfall):
TSS of sample taken on March 2, 2023 during a 0.72" rainfall event was tested to be 42.4 mg/I in
exceedance of the process water permit limit. All other parameters were below the benchmark limits.
The non-compliant sample can be attributed to runoff from upstream roads draining into our site
through our site exit carrying sediments and depositing them in our asphalt plant and concrete plant
areas. These sediments comingled with sediments from plant wash down into our concrete weir and
subsequently to our SW Pond could be contributing to this elevated TSS reading;our action plan is
underway to propose the installation of a new water bar/speed bump across our exit driveway to divert
offsite stormwater into the City's SW pipe under our site,as well as increase the frequency of our
concrete weir cleanouts to reduce TSS in the SW Pond.This action plan will be completed by the end of
Q2.