NCG590032_Fact Sheet_20200527

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
This form must be completed by Permit Writers for all expedited permits which do not require full Fact
Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile home parks, etc)
that can be administratively renewed with minor changes, but can include facilities with more complex
issues (Special Conditions, 303(d) listed water, toxicity testing, instream monitoring, compliance
concerns).
Basic Information for Expedited Permit Renewals
Permit Writer / Date
Sydney Carpenter 2/10/2020
Permit Number
NCO055221 / NCG590032
Facility Name / Facility Class
Marion WTP / PC-1
Basin Name / Sub -basin number
Catawba / 03-08-30
Receiving Stream / HUC
Nix Creek / 0305010101
Stream Classification / Stream Segment
C / Index: 11-20
Does permit need Daily Max NH3
limits?
No
Does permit need TRC
limits/language?
Already included.
Does permit have toxicity testing? IWC
if so.
Yes; IWC % is 90.
Does permit have Special Conditions?
Yes — Acute Toxicity Monitoring (Quarterly)
Does permit have instream monitoring?
Yes — Hardness Sampling
Is the stream impaired (on 303(d) list)?
If yes, for what arameter(s)?
No
Any obvious compliance concerns?
No enforcement cases on record. Two violations on record
for TRC limit violation and failure to submit eDMR reports.
Any permit mods since lastpermit?
No
New expiration date
12/31/2024
Facility Overview:
The Marion WTP operates a conventional water treatment plant designed for a potable flowrate
of 4 MGD. Treatment process for raw water consists of coagulation, flocculation, sedimentation,
filtration and chlorination. Backwash is discharged to two sludge lagoons, where the supernatant
is dechlorinated and then discharged into the Nix Creek. The maximum, monthly average
wastewater discharge between January 2017 and January 2020 was approximately 0.045 MGD.
Compliance History:
• No enforcement cases on record. Only two violations on record; one TRC limit violation
in July 2015 and an NOV in July 2016 for failure to submit reports in eDMR.
• Facility has passed all toxicity tests since January 2016.
RPA:
The maximum, monthly average wastewater discharge between January 2017 and January 2020
was approximately 0.045 MGD.

• Fluoride — no reasonable potential to exceed water quality standards; predicted max <
50% of allowable concentration; monitoring kept at quarterly as facility indicated
fluoride has the potential to be discharged.
• Copper — no reasonable potential to exceed water quality standards; removing parameter
from effluent table.
NCG59 General Permit Eligibility (for Conventional & Greensand WTPs):
• They've passed all TOX tests within the last 3 years (Apr 2017 — Jan 2020) — eligible
• No limits required based on most recent RPA — eligible
• Conclusion: Eligible for NCG59 General Permit.
Changes from previous permit to draft:
• Added regulatory citations.
• Added facility grade in A. (1.).
• Updated current treatment components list, new max monthly average, and HUC on the
Supplement to Cover Sheet.
• Updated eDMR footnote #1 in A. (I.) and updated Section A. (3.).
• Removed former footnote #4 stating "Samples shall be collected concurrently with WET -
test samples.", as this is no longer required per 2009 Changes to WTP Strategy Memo.
• Updated Turbidity monitoring frequency to Monthly per Table 5.1 in the "Changes to
WTP Strategy" 2009 Memo.
• Removed Copper parameter in A. (1.) Effluent table, as RPA did not show a reasonable
potential to exceed WQS.
• Removed Manganese parameter in A. (I.) Effluent table. As per "Assistance with BPJ on
WTP renewals" 2012 Memo, Manganese does not have a recommend standard and the
facility has no treatment technology to remove Manganese.
• Added Hardness sampling to A. (1.) Effluent table to monitor, as per "Implementation of
Instream Dissolved Metals Standards" 2016 Memo. Sampling in effluent and upstream.
Added corresponding footnotes #4 & #5.
Changes from draft to final:
• Facility has requested coverage under NCG59 permit.