NC0082376_Fact Sheet_20240415

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO082376
Sara Bassett / Compliance & Expedited Permitting Unit / sara.bassett9deq.nc. og_v / April 2024
FACILITY INFORMATION
Eric Mooneyham, WTP Operations Supervisor
Facility Contact/Facility
Name
E.M. Johnson Water Treatment Plant
Mailing Address
P.O. Box 590 Raleigh, NC 27602
Facility Physical Address
10301 Falls of Neuse Road
Max, Monthly Avg Flow (MGD)
N/A, facility not discharging
Type of Waste
Conventional; backwash from media filter and sedimentation
basins
Facility Class
PC-1
County
Wake
Permit Status
Renewal
Regional Office
RRO
STREAM CHARACTERISTICS
001: UT to Neuse River
001 (UT to Neuse) WS-IV;
Stream
NSW; CA
Receiving Stream
002 & 003: UT at Camp
Classification
New Life (Honeycutt
002 & 003 (UT to Camp
arm of Falls Lake)
New Life): WS-IV; NSW
Stream Segment
001: 27-(22)
001: 35°54'38.2"N
"W
002 & 003: 27-20.5- 2
Outfall Lat./
78035'25.1
7Q10 - Summer (cfs)
0
002: 350 54" 59.2" N
Outfall Long.
780 36" 00.1"W
7Q10 - Winter (cfs)
0
003: 35°54'56.2"N
78035'57.1"W
30Q2 (cfs)
0
Drainage basin
Nuese
Average Flow (cfs)
001: 1.1
Subbasin
03-04-01
002 & 003: 1.1
IWC (%)
100%
HUC
001: 03010106
002 & 003: 03010107
New Expiration Date
I May 31, 2029
303(d) List
No
NOTES
Facility has not discharged since 2007.
Eric Mooneyham has been designated as the new facility contact.
FACILITY SUMMARY
This facility is a wastewater treatment system utilizing conventional water treatment plant technology
[coagulation, flocculation, sedimentation, and filtration] with a design wastewater discharge of 8.8
MGD from media filter backwash and sedimentation basins with a design potable flowrate of 77 MGD,
which includes the following;
• two (2) backwash clarifiers
• filtrate pump station
• flow splitter box
• four (4) sludge thickeners
• parshall flume
Fact Sheet for Permit Renewal
April 2024 - NPDES Permit NCO082376 - Page 1

• polymer and caustic feed systems
• thickened sludge pump station
(with diversion to blending tanks or sludge disposal facility)
• four (4) sludge blending tanks
(residuals pumped to sludge disposal facility or filter presses)
• three (3) belt filter presses (drainage to sanitary sewer pump station)
o truck hauling and concrete pad for residuals
o belt filter press washwater pumps
o belt conveyors
• twelve (12) sand drying beds (drainage to sanitary sewer pump station)/ containment pad
• refer to Permit No. WQ0008431 for components specific to the sludge disposal facility.
Decanted wastewater from the sludge disposal facility is directed to the sanitary sewer pump
station.
• dechlorination and automatic pH control system
• refer to Permit No. WQ0022036 for the bulk reclaimed water distribution program (and
associated approvals and components)
Chemical usage:
• Ozone
• Sodium permanganate
• Chlorine
• Sodium hydroxide
• Polyaluminum chloride
• Hydrofluosilicic acid
• Ferric sulfate
• Sodium silica
RENEWAL SUMMARY
This renewal contains the following changes:
• Section A. (9) has been updated regarding electronic submission of effluent data. Federal
regulations require electronic submittal of all discharge monitoring reports (DMRs).
• The facility grade has been added to Section A. (1), A.(2.), and A. (3.).
• The facility reported the location of Outfall 002 has been moved; coordinates have been updated.
• The 3 sludge thickeners in the facility components list have been updated to 4.
• The facility map has been updated.
• Chronic Toxicity in A. (8.) has been updated to pass/fail limit.
• Iron monitoring has been removed.
• The parameter of Duration of Discharge has been added to outfalls 001 and 003.
COMPLIANCE HISTORY
No major compliance concerns in the last permit cycle; 1 NOD from 2023 and 1 from 2018
NCG59 GENERAL PERMIT ELIGIBILITY (FOR CONVENTIONAL & GREENSAND ONLY)
The E.M. Johnson WTP is not eligible for the general permit because there is not enough data to make this
determination. The facility needs a greater than 75% passing rate for twelve (12) quarters of active
discharges and passing results for the most recent four (4) consecutive quarters. [See attached Whole
Effluent Toxicity (WET) Testing below].
• Conclusion: Ineligible for NCG59 General Permit.
Fact Sheet for Permit Renewal
April 2024 - NPDES Permit NCO082376 - Page 2

WHOLE EFFLUENT TOXICITY (WET) TESTING
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 90 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures
outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised
December 2010, or subsequent versions) or "North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure" (Revised December 2010, or subsequent versions). The tests will be
performed during the months of February, May, August, and March.
This facility is not currently discharging; no current WET data.
REASONABLE POTENTIAL ANALYSIS
No effluent data because the E.M. Johnson WTP does not currently discharge and has not discharged since
2007; therefore, no RPA can be conducted for renewal.
COMMENTS ON DRAFT PERMIT
Fact Sheet for Permit Renewal
April 2024 - NPDES Permit NC0082376 - Page 3