NCG020152_Tier I_20240605

Martin Jay Nivens
Marietta Regional Manager Environmental Services
East Division
June 5, 2024 Submitted via Email
DEQ Winston Salem Regional Office
Attn: Jack Lawry-Popelka, Engineer II
450 West Hanes Mill Road
Winston Salem,NC 27105
jack.lawrypopelkakdeq.nc._og_v
RE: Martin Marietta Jamestown Quarry
NPDES Permit#NCG020152
Outfall#2 Stormwater Sample Exceedance Report
Dear Mr. Lawry-Popelka:
This letter is to complete the required sample exceedance notifications as outlined in Part F,
Sect. F-7 of the NPDES permit for our Jamestown Quarry located at 5725 Riverdale Drive in
Jamestown,NC. I have attached the Stormwater Sample Exceedance Report for the second quarter
2024 stormwater sample which resulted in an exceedance of the Turbidity baseline.
Should you have any questions or need any additional information, please contact me at 704-
409-1475 or via e-mail at jay.nivenskmartinmarietta.com
Sincerely,
Carolina Regional Office
8701 Red Oak Blvd.Suite 540,Charlotte,NC 28217
t.[phone] m.[phone] [e-mail]
www.martinmarietta.com

Martin
Marietta
Stormwater Sample Exceedance Report
Site: Jamestown Quarry
Date sample was collected: May 7, 2024
Outfall location: Outfall#2- Stormwater
Benchmark Parameter Exceeded:
• Turbidity—89.5 NTU(Tier I Exceedance for Turbidity benchmark of 50 NTU)
Date of Lab Results: May 21, 2024
Date of Stormwater Management Inspection: May 27, 2024
Personnel in attendance: Ryan Balint—Plant Manager, Jamestown Quarry
Inspection Observations:
• Maintenace performed in March of this year provided additional treatment but has not
provided sufficient residency time in the basin to allow for treatment of stormwater.
• Additional maintenance needed for stormwater basin and dewatering device.
Proposed Actions:
• Provide maintenance of basin and skimmer dewatering device to help settling efficiency of
basin.
• The pit expansion areas within the contributing drainage area for this basin which are not
currently being graded will be seeded and stabilized. This stabilization and ground cover
will help prevent sediment laden runoff from draining into the basin.
Date Actions Implemented: Basin and skimmer maintenance completed by mid-June, seeding
and stabilization completed by end of June.