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Home My WebLink AboutNC0079740_Fact Sheet_20181115FACT 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 11/15/18 Permit Number NCO079740 Facility Name / Facility Class T.J. Ellison WTP / PC-1 Basin Name / Sub -basin number Broad / 03-08-05 Receiving Stream / HUC Buffalo Creek / 0305010508 Stream Classification / Stream Segment C / Index: 9-53- 5 Does permit need Daily Maximum NH3 limits? N/A Does permit need TRC limits/language? Already present Does permit have toxicity testing? IWC (%) if so Yes; IWC = 3.45% Does permit have Special Conditions? No Does permit have instream monitoring? No; Instream turbidity monitoring removed in renewal Is the stream impair d on 303 d list)? No Any obvious compliance concerns? No Any permit mods since lastpermit? Yes; see below New expiration date 8/31/2023 Comments on Draft Permit? Yes see below Facility Overview: The T.J. Ellison WTP operates a conventional WTP designed for a potable flowrate of 12.0 MGD. The facility generates backwash with an intermittent discharge of 4 days per week for 6 hours. Since the last permit renewal, the WTP expanded from 8 MGD to 12 MGD, switched from chlorine gas to a 10% sodium hypochlorite for disinfection, constructed a decant discharge well that measures discharge flow, and constructed a dechlorination feed system using sodium thiosulfate 30%. Compliance History: • No NOVs or enforcements from May 2013 through July 2018 • Passed 12 of last 12 toxicity tests (have passed all toxicity tests from January 2014 to April 2018) RPA: The maximum monthly average flow between June 2015 and May 2018 was 0.22125 MGD. • Copper — no reasonable potential to exceed water quality standards; predicted max < 50% of allowable concentration; monitoring maintained at quarterly as copper is a parameter of concern for conventional WTPs • Fluoride — no reasonable potential to exceed water quality standards; predicted max < 50% of allowable concentration; monitoring maintained at quarterly as facility indicated fluoride has the potential to be discharged NCG59 General Permit Eligibility: • They have passed the last 12 tox tests, therefore they are eligible by tox standards • They do not have limits for any parameters, therefore they are eligible • Conclusion: They are eligible for the NCG59 • DWR decision: Permittee will remain on the individual permit for at least one more permit cycle to assess compliance under expanded potable flow Changes from previous permit to draft: • Updated eDMR footnote in A(1) and language in A(3) • Updated outfall map • Added regulatory citations • Language on the Supplement to Permit Cover Sheet has been updated • Added components list on Supplement to Permit Cover Sheet • Added units of measure in A(1) • Added facility grade in A(1) • Flow measurement frequency and sample type changed to continuous/recording per 2009 WTP strategy (facility discharges > 50,000 gpd) • Added effluent turbidity monitoring per 2009 WTP strategy • Removed instream turbidity monitoring as this segment of the receiving stream is no longer listed as impaired on the 2016 303(d) list • Added quarterly hardness monitoring and associated footnotes per current WTP guidance • Updated TRC footnote in A(1) • Removed footnote #4 stating "Samples shall be collected concurrently with WET - test samples" as this is no longer required • IWC updated in A(1) and A(2) per the RPA and WLA • Updated tox language in A(2) Changes from draft to final: • None Comments received on draft permit: Ori Tuvia (MRO; via email 8/17/18) • Why does the general permit for conventional WTP the WET testing is composite sample but the individual permit is grab sampling? o DWR response: After speaking with other staff, it seems like WET testing was put as composite in the general permit for conventional WTPs as it is more representative of the total discharge, which is preferred.