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Home My WebLink AboutNC0083551_Permit Modification_20171222Water Resources ENVIRONMENTAL QUALITY Mr. Jeffrey L. Hudson, Executive Director Onslow Water and Sewer Authority 228 Georgetown Road Jacksonville, NC 28540 Dear W. Hudson: ROY COOPER Governor MICHAEL S. REGAN Secremry LINDA CULPEPPER Interim Director December 22, 2017 Subject: Change -Page to Correct Error NPDES Permit NCO083551 Onslow Water and Sewer Authority Dixon Water Treatment Plant (WTP) Onslow County The Division of Water Resources (the Division) became aware of an error in your recently issued permit (effective January 1, 2018). A review of North Carolina Statute 15A NCAC 02B .0505(c)(3)(A) noted that instream monitoring should utilize grab samples while effluent samples should consist of composite samples. Accordingly, we hereby forward the modified permit pages to amend your permit changing sample type to grab for upstream and downstream monitoring for salinity and conductivity and have removed the compliance schedule, formerly footnote #3. Please insert these change pages into your existing permit and discard the old pages. We regret any inconvenience this causes your organization. Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Resources or any other Federal, State, or Local governmental permits that may be required. If you have questions, or if we can be of further service, please contact Brianna Young at brianna.young@ncdenr.gov or call (919) 807-6333. Res ly, da Culp er, Interim Director D� Division of Water Resources, NCDEQ Enclosure: NPDES Permit NCO083551 (Corrected Pages) be: Central Files NPDES Program Files Wilmington Regional Office ec: Aquatic Toxicology Unit, Susan Meadows [susan.meadows@ncdmr.gov] David Mohr, ONWASA [dmohr@onwasa.com] Edward Caron, ONWASA [ecaron@onwasa.com] James McDonnel, ONWASA Umcdonnel@onwasa.com] State of North Carolina I Environmental Quality I Water Resources 1617 Mail Service Center I Raleigh, NC 27699-1617 919 807 6300 919-807-6389 FAX https:lldeq. nc.govlaboutJdivisionslwater-resourceslwater-resources-pennitslwastewater-branchlnpdes-wastewater-permits -1 - - e Permit NCO083551 PART I. A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored' by the Permittee as specified below: .EFFLUENT CHARACTERISTICS (Parameter Codes) LIMITS wNiTWING REQUIREMENTS Monthly Averse Daily Maximum [eas�r�ment Fr.:. ueiic : - Sample Type -:Sample . Location2 Flow (50050) Continuous Recording E Salinity 00480 Monthly Composite E Salinity 00480 Monthly Grab U, D Conductivity 00094 Month Composite E Conductiv' 00094 Monthly Grab U, D Total Dissolved Solids 70295 Monthly Composite E Dissolved Oxygen 00300 Monthly Grab E, U, D H 00400 6.8 s.0 s pH :5 8.5 s.u. 2/Month Grab E H 00400 Monthly Grab U, D Total Residual Chlorine 3 50060 13 /L 2/Month Grab E Total Suspended Solids C0530 10.0 m /L 15.0 m /L 2/Month Composite E Turbid' 00070 2/Month Grab E Total Arsenic 01002 5 /L 34.5 /L Month' Grab E Total Chloride 00940 Monthly Composite E Total Manganese 01055 Monthly Composite E Total Zinc 01092 42.8 /L 47.6 /L Month Composite E Total Copper 01042 Quarters Composite E Total Lead 01051 Quarterly Composite E Total Nitrogen C0600 Quartedy Composite E Total Phosphorus C0665 Quarterly Composite E Ammonia Nitroen a C0610 Monthly Composite E Whole Effluent Toxicity GE3E) Monitoring5 Monitor & Re Port Quarter' Y Composite Ro E Footnotes: 1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR application system [see A. (4)]. 2. E = Effluent; U = Upstream at least 100 feet upstream from the outfall; D = Downstream at least 100 feet downstream from the outfall. 3. Limit and monitor only if the facility adds chlorine or chlorine derivatives to water that is eventually discharged. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. Page 1 of 2 s Permit NC0083551 4. Ammonia Nitrogen should be monitored if the Permittee uses chloramines (adds ammonia to chlorinated water) for secondary disinfection prior to backwashing. 5. Acute Toxicity 24-hr Pass/fail Monitoring: January, April, July, and October. Permittee shall use mysid shrimp as the test organism unless another organism of equal or greater sensitivity is deemed more appropriate based on the characteristics of the discharge and receiving stream. See Special condition A. (2) for details. All samples collected should be from a representative discharge event. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 2 of 2 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 Brianna Young 12/22/2017 Permit Number NCO083551 Facility Name Dixon WTP Basin Name/Sub-basin number White Oak 03-05-02 Receiving Stream UT to Stones Creek Stream Classification in Permit SA-H W-PNA Does permit need Daily Max NH3 limits? No Does permit need TRC limits/language? Yes Does permit have toxicity testing? Yes Does permit have Special Conditions? Yes Does permit have instream monitoring? Yes Is the stream impaired on 303 d list)? Yes Any obvious compliance concerns? See previous factsheet Any permit mods since lastpermit? Reverse Osmosis system now in use Current expiration date June 30, 2017 New expiration date November 30 2022 Comments received bn Draft Permit? Yes see below Director's office received a complaint from permittee about composite sampling for instream monitoring after final permit was issued. Spoke with Jeff Poupart 12/20/17; Jeff instructed that instream monitoring should be grab samples and not composite samples per NC rules, and that composite sampling is only meant for effluent. Per 15A NCAC 02B .0505(c)(3)(A): Samples collected in receiving waters shall be grab samples. Salinity and conductivity sampling has been separated out to effluent and instream monitoring, and instream monitoring has been made grab samples. Associated footnote #3 giving 2 month compliance schedule has been removed as the footnote was added to allow permittee time to install composite samplers for instream monitoring.