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Home My WebLink AboutDEQp00021708Michael F. Easley, Governor State of North Carolina William G. Ross, Jr., Secretary co Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality October 8, 2003 Mr. Michael E. Johnson, Environmental Manager DuPont Fluoroproducts 22828 Highway 87 W Fayetteville, North Carolina 28306-7332 Subject: Draft NPDES Permit Permit NC0003573 Fayetteville Works Bladen County Dear Mr. Johnson: Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft carefully to ensure thorough understanding of the conditions and requirements it contains. Changes to your existing permit are summarized below by outfall. Outfall 001 • Subpart I limitations have been updated in accordance with the most current 40 CFR. However, in light of the demonstration made by DuPont in accordance with 40 CFR 122.44(a)(2)(i), monitoring for these parameters if hereby waived for this permit cycle. This waiver is good only for the term of the attached draft permit. A request for waiver and supporting data will be required upon permit renewal. Outfall 006 • Subpart J limitations have been updated in accordance with the most current 40 CFR. The waiver request described above applied to outfall 001 only. As such, subpart J monitoring is required annually in the draft permit. Outfall 007 • Outfall 007 has been added to the permit with appropriate effluent limitations based on 40 CFR 414 subparts H and J. In accordance with 40 CFR 122.44(a)(2)(ii), the waiver described above cannot be applied to this outfall as this is the first permit in which the outfall has been included. As such, annual subpart J monitoring is required. Miscellaneous • Permit Expiration Date: The expiration date has been changed to October 31, 2006 in accordance with the Cape Fear River Basin permitting schedule. • The Supplement to Permit Cover Sheet has been modified to include reference to the Teflon and APFO processes. • Reference to the BCH energy project has bon ddle"tth 1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE 919-733-5083/FAX 919-733-0719 VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES Permit No. NC0003573 DuPont Fluoroproducts Page 2 a The Biomixer has been added to the treatment plant description. Submit any comments to me no later than thirty days following your receipt of the draft. Comments should be sent to the address listed at the bottom of this page. If no adverse comments are received from the public or from you, this permit will likely be issued in October, with an effective date of November 1, 2003. If you have any comments, questions, or concerns regarding this draft permit, call me at (919) 733-5083, extension 508. Sincerely, Mark D. McIntire, P.E. NPDES Unit enclosures cc: NPDES Unit Fayetteville Regional Office / Water Quality Section (draft permit, fact sheet) Aquatic Toxicology Unit (draft permit) Roosevelt Childress, EPA Region 4 (draft permit, fact sheet, permit application) ^.`-�S`-� ` �'.,,£ rte'✓;'�`�f,, . ,�,;,n ....°.°.11•f i-� ,y •'`-1 w^ �+.,�'�"' �% if .� IF y s33 ke �1 l ' 4 €� - Y -'a/ "�/ t 41. I[ 5 tri r rte'. wpm ?oft NO 3 w aV 7L: Outfall to Cape Fear I` r V w � , IN 41. ,�� ate,. r•,.. k ... ) ♦a ti Y �. `-f S ;':� �`� � i-`_ c'e'L r��yA3� { �•F`,p ?r � k 1 � DuPont Fayetteville Works - NC0003573 Facility ° Location USGS Quad Name: Duart Lat.: 4°49'53" Receiving Stream: Cape Fear River Long.: 78049'23" Stream Class: C Northl Not to SCALE Subbasin: Cape Fear - 030616 Permit NC0005575 A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average Daily maximum Measurement Frequency Sample Type Sample Location_ Flow (MGD) 2.0 Continuous Recording Influent or Effluent BODS, 20° C 191.3 lbs/day 508.2 lbs/day 3/Week Composite Effluent Total Suspended Solids 317.8 lbs/day 1030 lbs/day 3/Week Composite Effluent Temperature Weekly Grab Effluent Oil & Grease Monthly Grab Effluent Chronic Toxicity See Note 1 Quarterly Composite See Note 1 pH Between 6 and 9 Standard Units 3/Week Grab Effluent 40 CFR 414 Subparx.I _.... _...... ...... _. _. SeeNoLe2.._ Notes: 1 Chronic Toxicit, permit. The cora 001 and 002. 2 Based on a dem 414 Subpart I n the permit. THERE SHALL AMOUNTS. s iM { F � e ;riodaphnia) P/F ®3 3% February, 'May, August, NoAVember see eondition A. (7) of this nee monitoring point for chronic toxieitj shall bei downstream of Etlie confluence of outfall tration made by the Permittee and in aecordance�-withA0 CFR 122.44(a)(2)(i), all 40 CFR Loring is hereby waived for the term of_this perrnit� Thin waiver is good only for the term of } DISCHARGE' OF FLOATING `SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE r Permit NC0003573 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. E.I. DuPont de Nemours & Co., Inc. is hereby authorized to: 1. Continue to operate existing wastewater treatment facilities consisting of: • equalization; • neutralization; • aerated pre -digester tank; • nutrient feed system; • aeration tank with Biomixer0; • ; effluent flow measurement; • IAF unit; , , r • rotary � filte t for sludge thickenin ' g g • 'sludge filter press, and • steam heated sludge dryer. 1 i 2. Discharge treated ptoeeso wastewater -from. cite, Dymetrol, Nafion, TeflonO PMDF, and APFO, process; 4tori'nwater, ganitary wastewater, and co -n otralized regenerate from said treated facilities 'th ough 4hternal outfall 001; •5 3. Discharge. Nafion Gwzbiodegi adAle, wastewater through internal. outfall 006; 4. Discharge APFO low -biodegradable wastewater through internal outfall 007; 5. Discharge stormwater, non -contact cooling water, boiler blowdown and condensate, treated wastewater effluent from 001, and effluent from outfalls 006 and 007 through outfall 002 at the location specified on the attached map into the Cape Fear River, a class C water in the Cape Fear River Basin. Permit NC0005575 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER (,QUALITY PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, is hereby to receivir effluent li hereof. The permit shall become effective ][:-DuPQnt de N, t is tewater and std i IDuPaut Fluori I4C High [Ver in I other _°� ,urs._& Co-.- ._ .. ___«_ � ter from a facrfity loca{eo ate I rbons 37 F Lip ty ie Cape =Fear River Basir in accordance with ;onditions set forth in Parts I, II, III, and IV This permit and the authorization to discharge shall expire at midnight on October 31, 2006. Signed this day Alan W. Klimek, P.E. , Director Division of Water Quality By Authority of the Environmental Management Commission Permit NC0003575 A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from Outfall 007 (APFO low -biodegradable process wastewaters). Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER EFFLUENT LIMITATIONS MONITORING; REQUIREMENTS Monthly Daily Average Maximum Measurement Sample Sample Frequency Type Location. Flow (MGD) 0.048 Continuous Recording Effluent BODS, 20° C 18.0 lbs/day 48.0 lbs/day Monthly Composite Effluent Total Suspended Solids 22.81bs/day 73.3 lbs/day Monthly Composite Effluent pH Between 6 and 9 Standard Units 3/Week Grab Effluent 40 CFR 414 Subpart J See Condition A. (5) THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AM01 iNTS Permit NC0005575 A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from Outfall 006 (NaflonO low -biodegradable process wastewaters). Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Daily Average Maximum Measurement Sample Sample' Frequency Type Location. Flow (MGD) 0.036 Continuous Recording Effluent BOD5i 20° C 7.2 lbs/day 19.2 lbs/day Monthly Composite Effluent Total Suspended Solids 12.0 lbs/day 39.0 lbs/day Monthly Composite Effluent pH Between 6 and 9 Standard Units 3/Week Grab Effluent 40 CFR 414 Subpart J See Condition A. (4) THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. Permit NC0005575 A. (4) EFFLUENT LINIITATIONS AND MONITORING REQUIREMENTS - SUBPART J Beginning on the effective date of this permit and lasting through the expiration date, the Permittee shall comply with the limitations and monitoring frequencies established below at outfall 006: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS MontMy Average' Daily Maximum' Measurement Frequency Sample Type Sample Location Acenaphthene 0.006 0.014 Annually Grab Effluent Acenaphthylene 0.006 0.014 Annually Grab Effluent Acrylonitrile 0.028 0.070 Annually Grab Effluent Anthracene 0.006 0.014 Annually Grab Effluent Benzene 0.017 0.040 Annually Grab Effluent Benzo(a)anthracene 0.006 0.014 Annually Grab Effluent 3,4-Benzofluoranthene 0.006 0.014 Annually Grab Effluent Benzo(k)fluoranthene 0.006 0.014 Annually Grab Effluent Benzo(a)pyrene 0.006 0.014 Annually Grab Effluent Bis(2-ethylhexyl) plitltalate _. ^ ` ,, 009 `. 0.077 tlruZually_ ' Grab _._,. Effluent Carbon Tetrachloride 0.043: 0.114 Annually Gfa1j Effluent Chlorobenzene 0.043 0.114 , Annually E it Gaal Effluent Chloroethane t 0.03' 0.08 r Aitn€kally Gaal Effluent Chloroform 0.0)3"----'-"' 0.098 1 A#n&* Gj. Effluent Chrysene 0.0061 0.0 4, Arintially'y , Gtat Effluent Di -n -butyl phthalate 0.0¢6 1 0.01•.`3 Annually GXali Effluent 1,2 -Dichlorobenzene 0.05 0.238 `° Annually Gia b Effluent 113 -Dichlorobenzene ? 0.043 ` 01;14 Annually Gja ,. Effluent 1,4 -Dichlorobenzene AnnuallyGrab-' Effluent 1,1-Dichloroethane 0.007 0.018 Annually Grab Effluent 1,2-Dichloroethane 0.054 0.172 Annually Grab Effluent 1,1-Dichloroethylene 0.007 0.018 Annually Grab Effluent 1,2-trans-Dichloroethylene 0.008 0.020 Annually Grab Effluent 1,2-Dichloropropane 0.059 0.238 Annually Grab Effluent 1,3-Dichloropropylene 0.059 0.238 Annually Grab Effluent Diethyl phthalate 0.014 0.034 Annually Grab Effluent 2,4 -Dimethylphenol 0.006 0.014 Annually Grab Effluent Dimethyl phthalate 0.006 0.014 Annually Grab Effluent 4,6-Dinitro-o-cresol 0.023 0.083 Annually Grab Effluent 2,4-Dinitrophenol 0.362 1.288 Annually Grab Effluent Ethylbenzene 0.043 0.114 Annually Grab Effluent Fluoranthene 0.007 0.016 Annually Grab Effluent Fluorene 0.006 f i &,06--"i Annually Grab Effluent Hexachlorobenzene 0.5 gg/L Annually Grab Effluent Permit NC0005575 A. (4) SUBPART J REQUIREMENTS (CONTINUED) Beginning on the effective date of this permit and lasting through the expiration date, the Permittee shall comply with the limitations and monitoring frequencies established below at outfall 006: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average' Daily Maximum' Measurement Frequency Sample Type Sample Location Hexachlorobutadiene 0.043 0.114 Annually Grab Effluent Hexachloroethane 0.059 0.238 Annually Grab Effluent Methyl Chloride 0.033 0.089 Annually Grab Effluent Methylene Chloride 0.011 0.051 Annually Grab Effluent Naphthalene 0.006 0.014 Annually Grab Effluent Nitrobenzene 0.672 1.922 Annually Grab Effluent 2-Nitrophenol 0.020 0.069 Annually Grab Effluent 4-Nitrophenol 0.049 0.173 Annually Grab Effluent Phenanthrene 0.006 0.014 Annually Grab Effluent Phenol d 0)}6 ..._ 0.014 y. 64ab....,• Effluent Pyrene 0 006; 0.014 Ain>ially Grab Effluent Tetrachloroethylene O 016?' 0.049 Annually G;at} Effluent Toluene 0.0W ; i 0.02 Annually ,' Gtab Effluent 1,2,4-Trichlorobenze;e j 0.059 '--" p' 0.23'&' Annually Gxali Effluent 1,1,1 -Trichloroethane; 0007; 0.018 Arntally G;alb Effluent 1,1,2 -Trichloroethane" 001)= 0.0$ '. Annually Gial3 Effluent Trichloroethylene 1 0.008i 0.021 { Agnually Gist Effluent Vinyl Chloride , , . �' 0'.029 2 _._ At nually G,iab_ Effluent Notes: 1 All units are lbs/day unless otherwise noted. Should any annual monitoring result in detection of any Subpart J parameters, quarterly monitoring will begin immediately for the detected parameter(s). After four consecutive quarterly samples resulting in non -detection, the monitoring frequency will revert to annually. Permit NC0005575 A. (5) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - SUBPART J Beginning on the effective date of this permit and lasting through the expiration date, the Permittee shall comply with the limitations and monitoring frequencies established below at outfall 007: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Montlily Average' Daily Maximum' Measurement Frequency Sample Type Sample' Lecation Acenaphthene 0.008 0.019 Annually Grab Effluent Acenaphthylene 0.008 0.019 Annually Grab Effluent Acrylonitrile 0.038 0.093 Annually Grab Effluent Anthracene 0.008 0.019 Annually Grab Effluent Benzene 0.023 0.054 Annually Grab Effluent Benzo(a)anthracene 0.008 0.019 Annually Grab Effluent 3,4-Benzofluoranthene 0.008 0.019 Annually Grab Effluent Benzo(k)fluoranthene 0.008 0.019 Annually Grab Effluent Benzo(a)pyrene 0.008 0.019 Annually Grab Effluent Bis(2-ethylhexyl) phthalate,__ 0 $i, _•__ 0.103 t Annually Grab--, Effluent Carbon Tetrachloride ` 0 07 0.152 Arinally Gia t Effluent Chlorobenzene :. 0.071 0.152 Annually G#atj Effluent Chloroethane 0.0441 0.11 Annually ; Gab Effluent Chloroform j 0.044 0.130 ArinuAllyG:al, Effluent Chrysene 0.098 0.01 -`' Annually, Grab Effluent Di -n -butyl phthalate 0.0981, 0.01.7 Annually ; ,` Ghat Effluent 1,2 -Dichlorobenzene I 0 018 03 8 Anne ally Gtab Effluent 1,3 -Dichlorobenzene 0 057 `; 0:<1=52 Annilally Ghali Effluent 1,4-Dichlorobenzere---- 0.057 -' 1--"---0.-152 - Annually Grab Effluent 1,1-Dichloroethane 0.009 0.024 Annually Grab Effluent 1,2-Dichloroethane 0.072 0.230 Annually Grab Effluent 1,1-Dichloroethylene 0.009 0.024 Annually Grab Effluent 1,2-trans-Dichloroethylene 0.010 0.026 Annually Grab Effluent 1,2-Dichloropropane 0.078 0.318 Annually Grab Effluent 1,3-Dichloropropylene 0.078 0.318 Annually Grab Effluent Diethyl phthalate 0.018 0.045 Annually Grab Effluent 214 -Dimethylphenol 0.008 0.019 Annually Grab Effluent Dimethyl phthalate 0.008 0.019 Annually Grab Effluent 416-Dinitro-o-cresol 0.031 0.111 Annually Grab Effluent 2,4-Dinitrophenol 0.483 1.718 Annually Grab Effluent Ethylbenzene 0.057 0.152 Annually Grab Effluent Fluoranthene 0.009 0.022 Annually Grab Effluent Fluorene 0.008 0.019 Annually Grab Effluent Hexachlorobenzene ' 0.5 gg/L Annually Grab Effluent Permit NC0005575 A. (5) SUBPART J REQUIREMENTS (CONTINUED) Beginning on the effective date of this permit and lasting through the expiration date, the Permittee shall comply with the limitations and monitoring frequencies established below at outfall 007: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average' Daily. Maximum Measurement Frequency Sample Type. Sample Location Hexachlorobutadiene 0.057 0.152 Annually Grab Effluent Hexachloroethane 0.078 0.318 Annually Grab Effluent Methyl Chloride 0.044 0.118 Annually Grab Effluent Methylene Chloride 0.014 0.068 Annually Grab Effluent Naphthalene 0.008 0.019 Annually Grab Effluent Nitrobenzene 0.896 2.563 Annually Grab Effluent 2-Nitrophenol 0.026 0.092 Annually Grab Effluent 4-Nitrophenol 0.065 0.231 Annually Grab Effluent Phenanthrene 0.008 0.019 Annually Grab Effluent Phenol 0.008 ... `. 0.019 ,nnitalty... Grab •-.... Effluent Pyrene 0.068 0.019 Adnally Grab Effluent Tetrachloroethylene 0.021, 0.060 Annually Grab Effluent Toluene i 0.011 0.030 AriniYally ; ' Grafi Effluent 1,2,4-Trichlorobenze ' 0.078'- 0. 3 Gxab Effluent 1,1,1 -Trichloroethane 0.009;O.Od Arnttally Grab Effluent 1,1,2 -Trichloroethane = i 0.0131 0.651 '. € Aiinbally ' Grab Effluent Trichloroethylene 0.0104 { 0.028 Annually Grafi Effluent Vinyl Chloride._. _•' p' 0.039: - 0.069, Ainually Grab, Effluent Notes: 1 All units are lbs/day unless otherwise noted. Should any annual monitoring result in detection of any Subpart J parameters, quarterly monitoring will begin immediately for the detected parameter(s). After four consecutive quarterly samples resulting in non -detection, the monitoring frequency will revert to annually. Permit NC0005575 A. (6) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from Outfall 002 (boiler blowdown, once -through cooling water, treated wastewater from outfall 001, Nafion low -biodegradable process wastewaters from outfall 006, and APFO low -biodegradable process wastewater from outfall 007). Such discharges shall be limited and monitored by the Permittee as specified below: 1 Upstream shall be at the Permittee's river pump station; downstream shall be at the boat ramp approximately 4500 feet downstream at Prospect Hall Landing. 2 The temperature of the effluent shall be such as not to cause an increase in the temperature of the receiving stream of more than 2.8oC and in no case cause the ambient water temperature to exceed 32oC. 3 Daily shall be defined as every day except Saturdays, Sundays, and legal holidays. Instream temperature sampling shall be conducted weekly. 4 The samples for fluoride shall be taken downstream of the 001 discharge, unless or until, all neutralized Naflon area streams are discharged entirely into the cooling water outfall, 002. Instream fluoride monitoring shall be conducted monthly and shall coincide with effluent monitoring. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. EFFLUENT LIMITATIONS MONITORING REQUIREMENTS PARAMETER Monthly Daily Measurement Sample Sample Aver e . Maldmum Frequency Type Location' Flow (MGD) Continuous Recording Effluent Effluent, Temperature, °C See Note 2 Daily -3 Grab Upstream, Downstream BODS, 20° C Quarterly Composite Effluent COD Quarterly Composite Effluent Effluent, Fluoride4 7917lbs/day Weekly Grab Upstream, Downstream Dissolved Oxygen Wes kly Grab Upstream, Downstream Total Phosphorus '. Monthly ' ; Com' o ite Effluent Total Nitrogen Writhly Composite Effluent (NO2+NO3+TKN) Conductivity M+orithly Gal Upstream, Downstream PH Between G and` Standard l Jnits 3 Week GYali Effluent Notes: 1 Upstream shall be at the Permittee's river pump station; downstream shall be at the boat ramp approximately 4500 feet downstream at Prospect Hall Landing. 2 The temperature of the effluent shall be such as not to cause an increase in the temperature of the receiving stream of more than 2.8oC and in no case cause the ambient water temperature to exceed 32oC. 3 Daily shall be defined as every day except Saturdays, Sundays, and legal holidays. Instream temperature sampling shall be conducted weekly. 4 The samples for fluoride shall be taken downstream of the 001 discharge, unless or until, all neutralized Naflon area streams are discharged entirely into the cooling water outfall, 002. Instream fluoride monitoring shall be conducted monthly and shall coincide with effluent monitoring. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. Permit NC0005575 A. (7) CHRONIC TOXICITY PERMIT LIMIT ((QUARTERLY) - OUTFALL 001 The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 3.3%. The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be performed during the months of February, May, August, and November. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase lI Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. All toxicity testing Tesults .-re4uired `as part of this permit condition -will be ent+erod ,on the. Effluent Discharge Monitoring Form (MR J) for'the montes in which tests were performed', using the parameter code TGP3B for the pass/fail results and fiHP3B for` -the Gh> onic Value. Additionally, DWQ Form A'1;-'' ;(original} is ,to be sent to the following address: `a North Carolina Division., of W4te�- Quality ,: _ .... 1611 Mail Service Center i 3 talogh, North `Qarolina 276991162 Completed Aquatic jfq�dc.ty Test,, Forms shall be 'filed with the Environmental Sciences Brannch no later than 30 days after the end -� t�e,repdi-tjig period,. for which they eport is =mode. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. Permit NC0003573 A. (8) RE -OPENER CONDITION This permit shall be modified, or revoked and reissued to incorporate additional toxicity limitations and monitoring requirements in the event toxicity testing or other studies conducted on the effluent or receiving stream indicate that detrimental effects may be expected in the receiving stream as a result of this discharge. A. (9) BIOCIDE CONDITION The permittee shall not use any biocide except those approved in conjunction with the permit application. The permittee shall notify the Director in writing not later than ninety (90) days prior to instituting use of any additional biocide used in cooling systems which may be toxic to aquatic life other than those previously reported to the Division of Water Quality. Such notification shall include completion of Biocide Worksheet Form 101 and a map locating the discharge point and receiving stream.