HomeMy WebLinkAboutNC0084565_Fact Sheet_20180904FACT SHEET - ADDENDUM
FOR COMPLEX EXPEDITED - PERMIT RENEWAL
NPDES Permit NCO084565
Table 1 -- Basic Information Summary
Permit Writer / Date
Joe R. Corporon, L.G. — Revised 04Sep2018
oe.co oron ncdenr. ov 919-807-6394
Permit Number
NCO084565
Carolina Water Service [CWS], Inc. of NC
Permittee
PO Box 240908, Charlotte, NC 28224
Permittee's Consultant / Contact
Steve Bond, El (LandDesign) 707— 333-0325
Facility
The Harbour — Wells #1 and #2, Class PC-1
200 BayHarbour Road
Regional Office / Contact
MRO /
Basin Name / Subbasin Number
Catawba River Basin / 03-08-32
Receiving Stream / Verified
UT Lake Norman (Catawba River)
[segment 5-16-7- 8.5 / Yes.
Stream Classification in Permit / Verified
WS-IV; B; CA
Does permit need Daily Max NH3 limits?
No
Does permit need TRC limits/language?
Yes, limit 17 /L — updated TRC footnote
Does permit have toxicity testing?
Yes — test TGP313 in accord w/ IE Tech
Does permit have Special Conditions?
Yes, see Section A. 3. re -opener clause for study results
Does permit have instream monitoring?
No removed last renewal, Permittee's request)
Is the stream impaired [303(d) listed]?
No
Yes — consistently fails chronic WET test [sodium ion -
exchange (IE) treatment]. Zero -flow conditions at outfall (no
credit for dilution).
RPA — concludes metals to be limited equal to standards; the
Any obvious compliance concerns?
Permittee may consider changing treatment technology, or to
receive dilution credit, extend the outfall into the lake, fitting
the outfall with a modeled effluent diffuser.
Renewal adds compliance periods for metals limits (5 years)
and for Total Chlorides (3 years), and Composite Sampling
one year). See section A. 1. footnotes and section A. (3.).
Any permit mods since last permit?
No
Current expiration date
March 31, 2018
New expiration date
March 31, 2023
UPDATED BIMS DATA REVIEW / CHANGES TO THE DRAFT PERMIT:
1. DWR's re-examination of the corrected database (downloaded 04Sep2018) suggests a wasteflow
average of 0.00372 MGD. Unlike the previous, this average (< 0.030 MGD) suggests that a
composite sampler is not required [NCAC 2B.0505 (c)]. Therefore, DWR will delete language
requiring a composite sampler, as detailed in cover letter and DRAFT Special Condition A. (3).
2. Reasonable Potential Analysis RPA) — Updated, corrected databases (thru sep2018) continue to
show reasonable potential to exceed each respective surface water -quality standard for copper,
zinc, lead, chloride, and manganese (See attached RPA). No changes from permit draft
recommended.
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