NCG140516_Signed Insp Rpt_20240612

ROY COOPER
Governor u
ELIZABETH S.BISER
Secretary rk'aunR
WILLIAM E.TOBY VINSON.JR NORTH CAROLINA
lnrerim Director Environmental Quality
June 13, 2024
Triangle Ready Mix
Attn: Nelson Loureiro
1300 Nowell Road
Raleigh, North Carolina 27607
Subject: COMPLIANCE EVALUATION INSPECTION
Triangle Ready Mix
Morrisville Facility, Certificate of Coverage-NCG140516
NPDES Stormwater General Perm it-NCG140000
Wake County
Mr. Loureiro:
On June 12, 2024 a site inspection was conducted for the Triangle Ready Mix. facility located at 237
International Drive in Wake County, North Carolina. A copy of the Compliance Inspection Report is
enclosed for your review. The site visit and file review revealed that the subject facility is covered by
NPDES Stormwater General Perm it-NCG140000, Certificate of Coverage-NCG140516. Permit coverage
authorizes the discharge of stormwater from the facility to receiving waters designated as tributary to
Crabtree Creek, a Class C;NSW waterbody in the Neuse River Basin.
As a result of the inspection, the facility was found to be not in compliance with the conditions of the
NCG030000 permit. Please refer to the enclosed Compliance Inspection Report for additional comments
and observations made during the inspection.
Please be advised that violations of the NPDES Stormwater General Permit are subject to a civil
penalty assessment of up to $25,000 per day for each violation. If you or your staff has any
questions, comments, or needs assistance with understanding any aspect of your permit, please contact
me at [phone] or by e-mail at Thad.valentine(cDncdenr.gov.
Sincerely,
Thad Valentine
Environmental Senior Specialist
Q -olioa� North Ca 17earunent of Ern irorrmental Qtialiiy Division of Energy,tilincral and Land Resources
z!5-of D_ Raleigh Regional Office 1628 Mail Service Center-3800 Barrett Drive I Raleigh,North Carolina 2760q
v ,rH �,/
o Y�tF"'n o�sy` d1 919.791.4200

North Cai i Division of Energy,Mineral andt and Resources
[r�eD- Raleigh Regional Office 1628 Mail Service.Center i 3800 Barrett Drive j Raleigh.North Carolina 27601)
t;,YtF�i C YK','X
qw-ryni of enr`onmEuuus�\ �� 9197n1.4200

Compliance Inspection Report
Permit:NCG140516 Effective: 07/20/23 Expiration: 06+30i27 Owner. L&L Concrete LLC
SOC: Effective: Expiration: Facility: Triangle Ready Mix
County: Wake 237 International Dr
Region: Raleigh
Morrisville NC 27560
Contact Person:Keith Mercer Title: Phone:[phone]
Directions to Facility:
System Classifications: SWNC
Primary ORC: Certification: Phone:
Secondary ORC(s):
On-Site Representative(s):
Related Permits:
Inspection Date: 06012024 Entry Time 11 OOAM Exit Time: 12 45PM
Primary Inspector:Thaddeus W Valentine Phone:
Secondary Inspector(s):
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Ready Mix Concrete StormwaterlWastewater Discharge COC
Facility Status: ❑ Compliant Not Compliant
Question Areas:
Storm Water
(See attachment summary)
Page 1 of 4

Permit: NCG140516 Owner-Facility:L&L Concrete LLC
Inspection Date: 06/12/2024 Inspection Type:Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Document Review
I meet with Anthony Letterman the plant manager and we started by reviewing the SWPPP documentation
The site map provided had only the outfalls identified on the map with only the production area shown and the maintenance
shop not included.The site map should have all the information required by the permit and it should be provided for the whole
site at a size that can be easily read. If that takes more than one map then use more to be sure the entire facility is
represented and read your permit for what is required so nothing is left out. Label all the site boundary, stormwater outfalls
receiving surface waters and industrial activity areas to name just a few. Read the permit for what all is required.
Secondary containment will be discussed in the site walk through summery
The Preventive Maintenance and Good Housekeeping Plan(PM&GHP) provide was a general summery of what a PM&GHP
is and some of the actions that should be performed as part of the plan, but the plan was not a sight specific PM8GHP and
it didn't provide all the required schedules, inspections, maintenance and housekeeping activities for that facility arras and
systems the have the potential expose or pollution.The vehicle wash area,wash pits,BMP maintenance for drop inlet
protection and the vehicle maintenance areas are just a few that should be part of this plan. Please read your permit and
walk the site to be sure you are covering all the areas and activities that should be a part of this plan.
The facility does provide stormwater training, but it must cover preventive maintenance activities specific to this facility and
for the different operations at the facility that have the potential to contaminate stormwater.A search of the internet should
provide most anything you need.
The stormwater facility inspection program was provided, but again it lacked a thorough list of areas and activities that
should be inspected. Provide a checklist that includes all areas where there is the potential for leaks, spills and
maintenance requirements.
Stormwater samples have been taken and documentation was provided, but there was sample data missing for all samples
taken and only one of the outfalls had a DMR.The DMP with sample data provided was for an NCG070000 permit and does
not provide the correct sample requirements.The DMR's provided were missing signatures, dates, sample data,permit
number and outfalls with sample data. Sample for all the requirements of an NCG140000 permit and provide that information
on a DMR for the NCG140000 permit with your individual permit number shown on the DMR (Your permit number is
NCG1470516, not NCG140000)
A copy of the certificate of coverage was not provided and should be obtained and placed in the SWPPP.
Site Walk Through
The plant manager Anthony Letterman and Tony Victor with the Town of Morrisville both attended the walk through and we
started with the drop inlet at the lowest area of the site next to the settling basin. This inlet is noted in previous inspections
because the outlet pipe from the inlet drains directly to the basin and outlets below grade in the basin. This is causing the
sediment to settle in the outlet pipe and block the flow to the basin. I recommended something be done about the incorrectly
designed and installed pipe because it will never drain as intended and will constantly fill with sediment due to he lack of
positive flow to the basin.There is a fabric BMP under the inlet grate that is completely filled with sediment or slurry that
should have been changed out.This BMP will one of the required maintenance duties that should be on a schedule and be
documented every time it is replaced. The individual replacing the BMP, the date and the disposal method should be
included on the inspection and maintenance log.
The washout bays are full to the top with concrete slurry and should have been cleaned out before they reached their
capacity. Some type of schedule or depth of product in the bays should be developed for when the washout bays should be
cleaned out. The washout bays are directly next to the drop inlet that has the problems backing up and there is a notch
removed form the washout bay rim so that concrete slurry ,since it's full to the top, is running directly to the drop inlet and
filling the pipe system
Page 2 of 4

Permit: NCG140516 Owner•Facility:L&L Concrete LLC
Inspection Date: 06/12/2024 Inspection Type:Compliance Evaluation Reason for Visit: Routine
The settling pond was inspected and there appears to be a large amount of vegetation with cattails to an extent that it is
compromising the holding capacity of the basin. Maintenance of the basin should be provided and should be on some type
of schedule.The basin maintenance should be documented in the SWPPP as part of the preventive maintenance and good
housekeeping requirements with all the required information. The outfall for the basin has a visible slimy substance that is
present starting at the pipe outlet and proceeds through the rip rap outlet ditch to the tributary it outlets to. It was noted that
the ph was recently tested and within acceptable range, but we have not been provided with any of the required sample data
and are relying on correspondence with DWR and the Town of Morrisville. There has been a ph stabilizing system installed
for the basin and it appears to be working. There is a constant flow from the basin that should be investigated as there has
not been any recent rain events. Dry weather flows should be investigated as part of there stormwater permit requirements
and we will expect some type of investigation on our next inspection.
The viewed the maintenance facility and found that in general it is well kept, but there are some issues to address. Be sure
to close or cap off any drums, or sealable containers when not in use. There are many 55 gallon drums in the work bay are
that are lacking plugs. Batteries should be elevated off the ground and especially when located next to the bay doors. Clean
up any spills or leaks from vehicles as soon as identified and dispose of them correctly.
There are 250 gallon poly tanks in different areas of the facility. Some are full or nearly full and some are empty or nearly
empty.All tanks and drums that are not in immediate use should be placed inside of a secondary containment, even if they
are empty. If there are any that will no longer be used, they should be disposed of or placed within secondary containment.
Work on all the documentation that I have indicated is lacking along with any other required documents that were not
reviewed in more detail.At this point a good working SWPPP should have been in place, so work on that and all the site
issues detailed. Be sure to have all inspection and maintenance schedules in place and well documented for the next
inspection.
Begin to properly supply the required sample data through eDMR's and mail the signed hard copy to the regional office to
the attention of"Thad Valentine". If you have any questions or concerns, please don't hesitate to contact me for assistance
Page 3 of 4

Permit: NL:GUU516 Owner-Facility.LBLConcreteLLC
Inspection Date: 06.12.2024 Inspection Type:Compliance Evaluation Reason for Visit: Routine
Stormwater Pollution Prevention Plan Yes No NA NE
Does the site have a Stormwater Pollution Prevention Plan? 0 ❑ ❑ ❑
#Does the Plan Include a General Location(USGS)map? E ❑ ❑ ❑
#Does the Plan include a`Narrative Description of Practices"? 0 ❑ ❑ ❑
#Does the Plan include a detailed site map including outfall locations and drainage areas? ❑ ■ ❑ ❑
#Does the Plan include a list of significant spills occurring during the past 3 years? E ❑ ❑ ❑
#Has the facility evaluated feasible alternatives to current practices? ❑ ❑ ❑
#Does the facility provide all necessary secondary containment? ❑ 0 ❑ ❑
#Does the Plan include a BMP summary? 0 ❑ ❑ ❑
#Does the Plan include a Spill Prevention and Response Plan(SPRP)? E ❑ ❑ ❑
#Does the Plan Include a Preventative Maintenance and Good Housekeeping Plan? ❑ 0 ❑ ❑
#Does the facility provide and document Employee Training? 0 ❑ ❑ ❑
#Does the Plan include a list of Responsible Party(s)? N ❑ ❑ ❑
#Is the Plan reviewed and updated annually? E ❑ ❑ ❑
#Does the Plan include a Stormwater Facility Inspection Program? 0 ❑ ❑ ❑
Has the Stormwater Pollution Prevention Plan been implemented? 0 ❑ ❑ ❑
Comment: The stormwater pollution prevention plan was available, but there are parts that are missing
and varts that need to be updated. Please review teh summery for a detailed account of
missing information
Qualitative Monitoring Yes No NA NE
Has the facility conducted its Qualitative Monitoring? 0 ❑ 1111
Comment: Sample data is not consistant with the permit. Some data is missing. Please review the
summery
Analytical Monitorina Yes No NA NE
Has the facility conducted its Analytical monitoring? ❑ ❑ ❑
#Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas? ❑ ❑ 0 ❑
Comment: There is sample data but its for NCG070000 permit requirements and is missing sample data.
The DMR orovided is for a NCG07 and should be an NCG140000 which is the permit the
facility holds The DMR's provided are incomplete. Please review the summery for details
Permit and Outfalls Yes No NA NE
#Is a copy of the Permit and the Certificate of Coverage available at the site? ❑ ■ ❑ ❑
#Were all outfalls observed during the inspection? E ❑ ❑ ❑
#If the facility has representative outfall status,is it properly documented by the Division? ❑ ❑ 0 ❑
#Has the facility evaluated all illicit;non stormwater)discharges? ❑ 01111
Comment:
Page 4 of 4