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Home My WebLink AboutDEQp00020955Michael F. Easley, Governor State of North Carolina William G. Ross, Jr., Secretary Department of Environment and Natural Resources moklaw .0 Alan W. Klimek, P.E., Director knolooll Division of Water Quality January 9, 2004 Mr. Michael E. Johnson, Environmental Manager DuPont Fluoroproducts 22828 Highway 87 W Fayetteville, North Carolina 28306-7332 Dear Mr. Johnson: Subject: NPDES Permit Issuance Permit No. NC0003573 Fayetteville Works Bladen County Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated May 9, 1994 (or as subsequently amended). The only significant change present in the final permit is the requirement to post a warning sign along the wastewater conveyance downstream of the outfall from the wood -lined ditch. Staff from the Division's Fayetteville Regional Office have observed members of the public swimming in the channel downstream of the outfall from the ditch. The warning sign is intended reduce public exposure to wastewater effluent from DuPont's facility. If you have questions regarding the content of this sign, please direct them to Mr. Paul Rawls of the Fayetteville Regional Office. This sign should be in place within 30 days of the issuance of this permit. Compliance with all terms and conditions of the attached permit is the responsibility of the Permittee. Please note that T15A 08G .0204 of the North Carolina Administrative Code has been interpreted to mean that the Operator in Responsible Charge is responsible for operation of water pollution control systems. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this permit shall be final and binding. Please take notice that this permit is not transferable. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits required by the Division of Land Resources, Coastal Area Management Act, or any other Federal or Local governmental permits which may be required. 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 Mr. Johnson t DuPont Fayetteville - NC0003573 Page 2 If you have any questions or need additional information, please do not hesitate to contact Mark McIntire of my staff at (919) 733-5083, extension 508. Sincerely, ,,,off I' '' r '' Alan W. Klimek, P.E. cc: Central Files NPDES Unit Files Fayetteville Regional Office Aquatic Toxicology Unit EPA Region 4 V '(t '' , Permit NC0003573 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, E.I. DuPont de Nemours & Co. is hereby authorized to discharge wastewater and stormwater from a facility located at DuPont Fluorocarbons NC Highway 87 Duart Township Bladen County to receiving waters designated as the Cape Fear River in the Cape Fear River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. The permit shall become effective February 1, 2004. This permit and the authorization to discharge shall expire at midnight on October 31, 2006. Signed this day January 9, 2004. Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission f ) V 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: Continue to operate existing wastewater treatment facilities consisting of: • equalization; • neutralization; • aerated pre -digester tank; • nutrient feed system; • aeration tank with Biomixer®; • dual clarifiers; • effluent flow measurement; • DAF unit; • rotary filter for sludge thickening; • sludge filter press; and • steam heated sludge dryers. 2. Discharge, treated process wastewater from Butacite, Dymetrol, Nafion, Teflon& PMDF, and - APFO', process stormwater, sanitary wastewater, and co -neutralized regenerate from said treated facilities through internal outfall 001; 3. Discharge Nafion low -biodegradable wastewater through internal outfall 006; 4. Discharge APFO low -biodegradable wastewater through internal outfall 007; S. 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. r 1 + Permit NC0003573 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: Aver e' Daily Maximum " Measurement Frequency Sample e Sample Location Flow (MGD) 2.0 Continuous Recording Influent or Effluent B0135,200 C 191.3 lbs/day 508.21bs/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 6.0 and 9.0 Standard Units 3/Week Grab Effluent 40 CFR 414 Subpart I See Condition A. (2) Notes: 1 Chronic Toxicity (Ceriodaphnia) P/F ® 3.3% February, May, August, November; see condition A. (8) of this permit. The compliance monitoring point for chronic toxicity shall be downstream of the confluence of outfall 001 and 002. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. Permit NCOG03573., 4, A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - SUBPART I 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 001: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average' Daily Maximum' Measurement Frequency Sample e Sample Location Acenaphthene 0.174 0.465 See Note 2 Grab Effluent Acenaphthylene 0.174 0.465 See Note 2 Grab Effluent Acrylonitrile 0.757 1.909 See Note 2 Grab Effluent Anthracene 0.174 0.465 See Note 2 Grab Effluent Benzene 0.292 1.073 See Note 2 Grab Effluent Benzo(a)anthracene 0.174 0.465 See Note 2 Grab Effluent 3,4-Benzofluoranthene 0.181 0.481 See Note 2 Grab Effluent Benzo(k)fluoranthene 0.174 0.465 See Note 2 Grab Effluent Benzo(a)pyrene 0.181 0.481 See Note 2 Grab Effluent Bis(2-ethylhexyl) phthalate 0.813 2.201 See Note 2 Grab Effluent Carbon Tetrachloride 0.142 0.300 See Note 2 Grab Effluent Chlorobenzene 0.118 0.221 See Note 2 Grab Effluent Chloroethane 0.821 2.114 See Note 2 Grab Effluent Chloroform 0.166 0.363 See Note 2 Grab Effluent 2 -Chlorophenol 0.245 0.773 See Note 2 Grab Effluent Chrysene 0.174 0465 See Note 2 Grab Effluent Di -n -butyl phthalate 0.213 0.450 See Note 2 Grab Effluent 1,2 -Dichlorobenzene 0.608 1.286 See Note 2 Grab Effluent 1,3 -Dichlorobenzene 0.245 0.347 See Note 2 Grab Effluent 1,4 -Dichlorobenzene 0.118 0.221 See Note 2 Grab Effluent 1,1-Dichloroethane 0.174 0.465 See Note 2 Grab Effluent 1,2-Dichloroethane 0.536 1.665 See Note 2 Grab Effluent 1,1-Dichloroethylene 0.126 0.197 See Note 2 Grab Effluent 1,2-trans-Dichloroethylene 0.166 0.426 See Note 2 Grab Effluent 2,4-Dichlorophenol 0.308 0.884 See Note 2 Grab Effluent 1,2-Dichloropropane 1.207 1.815 See Note 2 Grab Effluent 1,3-Dichloropropylene 0.229 0.347 See Note 2 Grab Effluent Diethyl phthalate 0.639 1.602 See Note 2 Grab Effluent 2,4 -Dimethylphenol 0.142 0.284 See Note 2 Grab Effluent Dimethyl phthalate 0.150 0.371 See Note 2 Grab Effluent 4,6-Dinitro-o-cresol 0.615 2.185 See Note 2 Grab Effluent 2,4-Dinitrophenol 0.560 0.970 See Note 2 Grab Effluent 2,4-Dinitrotoluene 0.892 2.249 See Note 2 Grab Effluent 2,6-Dinitrotoluene 2.012 5.057 See Note 2 Grab Effluent Ethylbenzene 0.252 0.852 See Note 2 Grab Effluent Y Permit NC0003573 A. (2) SUBPART I 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 001: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS - Monthly Avera ei Daily )d Mauml Measurement Fre uenc Sample e Sample Location - Fluoranthene 0.197 0.536 See Note 2 Grab Effluent Fluorene 0.174 0.465 See Note 2 Grab Effluent Hexachlorobenzene 0.5 µg/L Annually3 Grab Effluent Hexachlorobutadiene 0.158 0.387 See Note 2 Grab Effluent Hexachloroethane 0.166 0.426 See Note 2 Grab Effluent Methyl Chloride 0.679 1.499 See Note 2 Grab Effluent Methylene Chloride 0.316 0.702 See Note 2 Grab Effluent Naphthalene 0.174 0.465 See Note 2 Grab Effluent Nitrobenzene 0.213 0.536 See Note 2 Grab Effluent 2-Nitrophenol 0.323 0.544 See Note 2 Grab Effluent 4-Nitrophenol 0.568 0.978 See Note 2 Grab Effluent Phenanthrene 0.174 0.465 See Note 2 Grab Effluent Phenol 0.118 0.205 See Note 2 Grab Effluent Pyrene 0.197 0.529 See Note 2 Grab Effluent Tetrachloroethylene 0.174 0.442 See Note 2 Grab Effluent Toluene 0.205 0.631 See Note 2 Grab Effluent 1,2,4-Trichlorobenzene 0.536 1.105 See Note 2 Grab Effluent 1,1,1 -Trichloroethane 0.166 0.426 See Note 2 Grab Effluent 1,1,2 -Trichloroethane 0.166 0.426 See Note 2 Grab Effluent Trichloroethylene 0.166 0.426 See Note 2 Grab Effluent Vinyl Chloride 0.821 2.114 See Note 2 Grab Effluent Notes: 1 All units are lbs/day unless otherwise noted. 2 Monitoring for the specified parameters has been waived based on a demonstration made by the Permittee in accordance with 40 CFR 122.44(a)(2)(i). This waiver is good only for the term of the permit. Please note that any exceedence of the effluent limitations found herein shall be considered a permit violation subject to appropriate enforcement action. 3 A sufficiently sensitive analytical technique shall be employed for determining the presence of hexachlorobenzene in the effluent. Permit NC000. 357,3, 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 006 (Nation® 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 Samplep Sam le Fre uencTy e Location Flow (MGD) 0.036 Continuous Recording Effluent BODS, 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 6.0 and 9.0 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 AMOUNTS. Y r Permit NC0003573 A. (4) 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 e Maximum Measurement Sample Sample Fre uen e Location , Flow (NIGD) 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 73.31bs/day Monthly Composite Effluent pH Between 6.0 and 9.0 Standard Units 3/Week Grab Effluent 40 CFR 414 Subpart J See Condition A. (6) THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. Permit NC00,0357,3, 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 006: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average! Daily Maxirnuml Measurement Frequency Sample e 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) phthalate 0.029 0.077 Annually Grab Effluent Carbon Tetrachloride 0.043 0.114 Annually Grab Effluent Chlorobenzene 0.043 0.114 Annually Grab Effluent Chloroethane 0.033 0.089 Annually Grab Effluent Chloroform 0.033 0.098 Annually Grab Effluent Chrysene 0.006 0.014 Annually Grab Effluent Di -n -butyl phthalate 0.006 0.013 Annually Grab Effluent 1,2 -Dichlorobenzene 0.059 0.238 Annually Grab Effluent 1,3 -Dichlorobenzene 0.043 0.114 Annually Grab Effluent 1,4 -Dichlorobenzene 0.043 0.114 Annually Grab 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-Dichloroptopane 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 0.014 Annually Grab Effluent Hexachlorobenzene 0.5 µg/L Annually Grab Effluent V A. (5) SUBPART J REQUIREMENTS (CONTINUED) Permit NC0003573 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 Auera e Daily Maxiinuml Measurement Fre uene Sample e 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 0.006 0.014 Annually Grab Effluent Pyrene 0.006 0.014 Annually Grab Effluent Tetrachloroethylene 0.016 0.049 Annually Grab Effluent Toluene 0.008 0.022 Annually Grab Effluent 1,2,4-Trichlorobenzene 0.059 0.238 Annually Grab Effluent 1,1,1 -Trichloroethane 0.007 0.018 Annually Grab Effluent 1,1,2 -Trichloroethane 0.010 0.038 Annually Grab Effluent Trichloroethylene 0.008 0.021 Annually Grab Effluent Vinyl Chloride 0.029 0.052 Annually 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 NCOOA3573, A. (6) 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 Monthly Average' Daily Maximum' Measurement Fre uenc Sample e Sample Location . 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 0.038 0.103 Annually Grab Effluent Carbon Tetrachloride 0.057 0.152 Annually Grab Effluent Chlorobenzene 0.057 0.152 Annually Grab Effluent Chloroethane 0.044 0.118 Annually Grab Effluent Chloroform 0.044 0.130 Annually Grab Effluent Chrysene 0.008 0.019 Annually Grab Effluent Di -n -butyl phthalate 0.008 0.017 Annually Grab Effluent 1,2 -Dichlorobenzene 0.078 0.318 Annually Grab Effluent 1,3 -Dichlorobenzene 0.057 0.152 Annually Grab Effluent 1,4 -Dichlorobenzene 0.057 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 2,4 -Dimethylphenol 0.008 0.019 Annually Grab Effluent Dimethyl phthalate 0.008 0.01.9 Annually Grab Effluent 4,6-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 µg/L Annually Grab Effluent Permit NC0003573 A. (6) 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: PARAME'T'ER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average' Daily Mwdinuml Measurement Fre uenc Sample e 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 Annually Grab Effluent Pyrene 0.008 0.019 Annually Grab Effluent Tetrachloroethylene 0.021 0.066 Annually Grab Effluent Toluene 0.011 0.030 Annually Grab Effluent 1,2,4-Trichlorobenzene 0.078 0.318 Annually Grab Effluent 1,1,1 -Trichloroethane 0.009 0.024 Annually Grab Effluent 1,1,2 -Trichloroethane 0.013 0.051 Annually Grab Effluent Trichloroethylene 0.010 0.028 Annually Grab Effluent Vinyl Chloride 0.039 0.069 Annually 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 NCO003573, A. (7) 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: 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 320C. 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 Nafion 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- Maximum Frequency e Location' Flow (MGD) Continuous Recording Effluent Effluent, Temperature, °C See Note 2 Daily3 Grab Upstream, Downstream BODS, 20° C Quarterly Composite Effluent COD Quarterly Composite Effluent Effluent, Fluoride; 79171bs/day Weekly Grab Upstream, Downstream Dissolved Oxygen Weekly Grab Upstream, Downstream Total Phosphorus Monthly Composite Effluent Total Nitrogen (NO2+NO3+TKN) Monthly Composite Effluent Conductivity Monthly Grab Upstream, Downstream pH Between 6.0 and 9.0 Standard Units 3/Week Grab 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 320C. 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 Nafion 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 NC0003573 A. (8) 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 II 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 results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR -1) for the months in which tests were performed, using the parameter code TGP313 for the pass/fail results and THP313 for the Chronic Value. Additionally, DWQ Form AT -3 (original) is to be sent to the following address: Attention: Environmental Sciences Branch North Carolina Division of Water Quality 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days after the end of the reporting period for which the report is made. 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 NC0003573y A. (9) 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. (10) 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. A. (11) OUTFALL WARNING CONDITION Within 30 days of the issuance of this permit, the permittee shall post a sign along the wastewater conveyance. This sign shall include language that indicates the channel to be an industrial wastewater conveyance no recommended for recreational purposes. This sign shall also provide appropriate DuPont contact information in the event members of the public have questions or concerns. Re: comments on NC0003573 - DuPont Fayetteville Subject: Re: comments on NC0003573 - DuPont Fayetteville From: Hyatt.Marshall@epamail.epa.gov Date: Mon, 27 Oct 2003 14:26:57 -0500 To: Mark McIntire <mark.mcintire@ncmail.net> based on your agreement to add a sentence to the permit requiring that a sufficiently sensitive analytical method be used for monitoring for hexachlorobenzene, this email constitutes EPA's concurrence with the revised draft permit. I prefer that you do not mention the applicable PQL. thanks for your help. Marshall 1 of 1 10/27/03 2:35 PM imap://mark.mcintire%40dwq.denr.ncmail.net@cros.ncmail.net:14... Subject: Re: dupont From: Paul Rawls <Paul.Rawls@ncmail.net> Date: Mon, 01 Dec 2003 09:36:57 -0500 To: Mark McIntire <mark.mcintire@ncmail.net> Any language that would let the public know that it is not just a stream.. "Please be advised, This is a discharge point for treated industrial wastewater and is not recommended for recreational purposes any questions should be directed to »»»DUPONT»»»>" How about letting them furnish the language? Mark McIntire wrote: Afternoon Paul. Wanted to get some more specific input from you about the sign that we're going to require DuPont to post. Can you take a crack at some language? I'd propose using the expression Wastewater Conveyance in lieu of Effluent Channel. Hope you have a great Thanksgiving. Be safe on the roads. Mark 1 of 1 1/6/2004 8:19 Am LT -11 wJ cq3 CLO N O N N W Vi U U U Y C N N N r! •CC Y Y Y W Y L.i � t"., 'CC N y y:• N _ N O +' Sr N••L" C Y N _'c� .r � .-i N N •a �„ .� '� ^-.. '� Y Nr. Y L." C L'. D Y Q a� cv c� -- ca o i ° `� E E cd = i E ^.. 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PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION/NPDES UNIT 1617 MAIL SERVICE CENTER RALEIGH, NC 27699-1617 Before the undersigned, a Notary Public of said County and State, duly NOTIFICATION OF INTENT commissioned and authorized to administer oaths, affirmations, etc., personally TO ISSUE A NPDES WASTEWATER PERMIT appeared. On the basis of thorough staff review and anolication who, being duly sworn or affirmed, according to law, doth depose and say that of NC General Statute 143.21. Public law 92.500 he/she is # ., f,..l. '- �.Cl�E""seRY and other lawful standards " and reoulations. the North of THE FAYETTEVILLE PUBLISHING COMPANY, a corporation organized Carolina Environmental Man- agement Commission aro- oases to issue a National Pol- and doing business under the Laws of the State of North Carolina, and publishing Svstem INPDESI wla tewaiter a newspaper known as the THE FAYETTEVILLE OBSERVER, in the City of discharge permit to the oarsonis) listed below effec- Fayetteville, County and State aforesaid, and that as such he/she makes this tive 45 days from the pub- lisf; date of this notice. affidavit; that he/she is familiar with the books, files and business of said Written comments regard- Corporation and by reference to the files of said publication the attached Ino the or000sed permit will be accented until 30 dava af- advertisement Of ( 1'T" 7; Cter the oublish date of this _ ,_lu�tsfi-_ i` -j C. notice. All comments re- ceived prior to that date arew)�,jt:�.k.7_ +' ljy., r"i;?j•+�t,1 �, 1i":.j`?"j� considered in the final deter- minations reaardina the oro- oosed permit. The Director of the NC Division of Water Qualitv may decide to hold a oublic meeting for the oro- oosed permit should the Divi- Of i` -1C 173 ^" 'J t sion receive a sianificant de- gree of public interest. was inserted in the aforesaid newspaper in space, and on dates as follows: Conies of the draft permit and other sunonrtina infor. mation on file used to deter- OC •�^ y mine conditions oresent in the draft oermit are available upon request and navment of the costs of reproduction. Mail comments and/or re - and at the t Guests for information to the .tion The Fayetteville Observer was a newspaper meeting all the requirements an NC Division of Water Qualitv above addressator call at 1-597 G.S. of N. C. qualifications Valero 19191 The above 733-5083. extension 520. 1 the books and files of the aforesaid corporation and publication. Please include the NPOES aarmit number lattachedl in atInterest- • ed persons mav also visit the Division of Water Qualitv at 512 N. Salisbury Street. . Ralsiah. NC 27604-1148 be. tween the hours of 8:00 a.m. L. .,G..-`-1• CREIAF,-' and 5:00 D.M. to review infor- ,r:•'}E mation on file. Title DuPont Fluorooroducts. ; 22828 Hiahwav 87 W.. Favet- .c taville:. NC 28306. Bladen before this day Countv. has aooliad for re- Sworn or affirmed to, and subscribed me, newal of its NPDES dis- chase oermit (number y i:',C T 13 13 ER ='w a,, c)3 NC00035731 discharaino to in , A.D., the Caoe Fear River ths)f Cans Fear River Basin. This facility ooerates three inter- nal outfalls. 001. nos. and In Testimony Whereof, I have hereunto set my hand and affixed my official seal, 007. that combine with non - contact cooling water. bolierhe day and year aforesaid. blowdown. and stormwater. and discharoe throuah out- fall 002 to the Caoe Fear Riv-i sr. Internal outfall 001 dis- charges a maximum of 2.0 Lk MGD of treated orocess wastewater: Internal outfall 006 discharoes a maximum Notary Public of 0.036 MGD of orocess wastewater. Internal outfall 007 discharoes a maximum of 0.048 MGD of orocess wastewater. No oarameters My commission are currently water duality_ Z'r t..: G 200 day of / brei limited. however this dis- impact future l-location charge may at - 1 ... tionof the receiving l stream. 10/12 447484 MAIL TO: PID BOX 2�111'5_137) 3 . ;:s ig, p ``T�'' 00 3 ROBESON COUNTY NORTH CAROLINA r 1= Associate Editor, of THE ROBESONIAN, a newspaper published in Robeson County, N.C., being duly sworn, says that at the time the attached notice was published in THE ROBESONIAN, said newspaper met all of the requirements and qualifications prescribed by North Carolina General Statute 1-597: that said newspaper had a general circulation to actual paid subscribers: and, was admitted to the United States mail as second class matter in Robeson County, N.C.; and further, that the attached notice was published in THE ROBESONIAN once a week. for consecutive weeks on the following issue dates 20 fLJI Q �-Associate Editor Sworn to a Td bscribe` „efore me This the day of 7 NU 2003, NOTARY PUBLIC My commission expires: PUBLIC NOTICE STATE OF NORTH'.CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION/NPDES UNIT, 1617 MAIL SERVICE CENTER RALEIGH, NC 27699-1617 Notification of Intent To Issue A NPDES Wastewater Permi4 On the basis of thorough staff review and application of NC General Statute 143.21, Publio saw 92-•500 and other lawful standards and regulations, the lish date of this notice - Written comments regarding the ro- posed permit will be accepted'untiil 30 days after the publish date of this no- tice. All comments receivedodor to that date are considered inthe final do, terminations regarding the proposed permit. The Director of the NC Division of Water Quality may decidetohold a public meeting for the proposed permit should the Division feceive a significant degree of public interest. Copies of the draft permit and other suppomng information an file used to determine conditions PPresent in the draft permit are available upon request ter Quality at .512 N. Salisbury Street, Raleigh, NC 27604-1148 between the flours of 8:00 a.m, and 5:00`p;m. to to view information on file. DuPont Ftuoroproducts, 22828 High- way 87 W., Fayetteville, NO 26306, Bladen County, has applied for renewal of its NPDES discharge permit (num- ber NC0003573) discharging to the Cape Fear River in the Cape Fear Riv at Basin. This facility operates three in- temal oudalls; 001, 006, and 007 that I combine"with non -contact coolirfg war ter, boildr blowdowm and stormwater and discharge through outfall 002 to the Cape Fear River. Internal outfall 001 discharges a maximum of 2.0 MGD of treated process wastewater.. Internal "outfall 006 discharges a maxi� mum of. 0.036 MOD of process waste- water. Internal ouffall 007 discharges a maximum of 0.048 -MOD of process wastewater. No parameters are cur, gently water quality: limited, however this, may.lmpact future alto - cation of the receiving stream. -Oct. 13 NCDE-101303 October 7, 2003 NCDENR/DWQ FACT SHEET FOR NPDES PERMIT DEVELOPMENT DuPont Fluoroproducts Fayetteville, North Carolina Works NPDES Permit Number NC0003573 (1.) F .. .................................__............... _. ........... 2. Permitted Flow MGD : ' See Section 2.1 6 Coun Bladen 0.4..Permitted )............._..........._t3'................................................................... ._......................... .......... (3.) Facility Class: ............................._............... ...III .._�7..). Regional Office........................... Fayette t........................_..........................................................................._............ (4 ..._Pretreatment Program ........... NA................................................................................................_............(S.) USGS Top Quad................._...._H23SE (5.) Permit Status: Renewal (9.) USGS Quad Name: Duart 1. Receiving Stream: ......................................Cape Fear River......................................................?.....(7. )...Drainage Area....�miz):............' 4790._................_......... (2.) Sub -basin: 03-06-16 .................._........_...................................;...._�....._................................................._Q..._....._�.........._)................................................................._......... 8. Summer 7 10 cfs : 791 3. Stream Index Number: cfs : 9. Winter 7....Q........1 NA ......_)....................................._...........................................................................;........................................................................................................................................).........................................__.............._.........._)........................................._._...........................__.... (4.) Stream Classification: ....................................,........ C ............ ............................................................. ..................._.......................�10. .0 �..30Q2 (cfs)......................................................._NA..................................... 5.) 303(d Status...__.................................._.._.._>._Not ... Listed ....................................................__..............._.........(11.).Average Flow_(cfs)..................._5676............................... ............................................... 6. 305(b) Status: j Su orttn 12. IWC %: j 3.3% outfall 1.0 PROPOSED CHANGES 1.1 Supplement to Cover Page • Modified to include references to APFO and PMDF process; • Modified to include outfall 007 (APFO low -biodegradable process wastewaters); • Modified to include biomixer in treatment plant description. 1.2 Outfall 001 • 40 CFR 414 Subpart I requirements have been deleted based on a demonstration made by the Permittee in accordance with 40 CFR 122.44(a)(2)(i). 1.3 Outfall 006 • 40 CFR 414 Subpart J requirements have been updated in accordance with most recent Federal Register. 1.4 Outfall 007 Added outfall to permit with appropriate effluent limitations based on 40 CFR 414 Subpart H, Specialty Organic Chemicals; • Added 40 CFR 414 Subpart J requirements. NPOES Permit Fact Sheet - October 7, 2003 DuPont Fayetteville Page 2 NC0003573 2.0 BACKGROUND This is a permit renewal for a major industrial wastewater treatment facility with a current facility design and permitted flow of 2.0 MGD with a discharge to the Cape Fear River just downstream of Lock & Dam M. In operation since 1970, this DuPont facility sits on approximately 2500 acres, 600 dedicated to the current manufacturing facilities. Current facilities include the Butacite plant, the Nafion plant, the Teflon plant, and the APFO plant. 2.1 Butacite® Butacite@ (polyvinyl butyral - PVB) is the plastic film that holds the two pieces of glass in an automotive windshield together. The Butacite layer also provides much needed strength to the windshield. While nearly 70% of DuPont's butacite goes to the automotive industry, more and more is being used in the construction industry to satisfy new building codes requiring such protective measures as hurricane resistant glass. Butacite@ is manufactured in large rolls, shipped out in refrigerated trucks to glass manufacturers. The refrigeration is a requirement as butacite sticks to itself at temperatures above 600F. The Butacite plant manufactures finished butacite as well as polyvinyl butyral resin for shipment to other DuPont facilities. 2.2 Nafion@ NafionO (Na - F - ion) is a fluorocarbon used in a number of industries. Also an extruded resin and eventually a thin film, nafion, when subjected to an electric current in salt water, makes NaOH and Cl gas. In this application it replaces the mercury process formerly used by such companies as Holtrachem to manufacture chlorine. Nafion is also used in fuel cells to generate electricity. The nafion plant manufactures five products including: • Nafion@ membrane - a plastic film used in the chloroalkali industry and electrochemical fuel cells; • Nafion0 resins - ultimately extruded into film; • Nafion@ solution - generated during the production of resin; • FLPR vinyl ether monomers - shipped to other DuPont locations to produce various fluorochemical products such as Teflon. • HFPO monomers - shipped to other DuPont locations to produce various fluorochemical products such as Teflon. 2.3 Teflon® DuPont's PMDF Teflon@ manufacturing area produces Teflon@ FEP resin. Teflon@ FEP resin is used in the electronics industry as a coating for wire, as well as many other uses. 2.4 APFO DuPont's APFO (ammonia perfluoro-oxidate) has just recently started production. It is a resin used in the manufacture of Teflon. Concern has been raised about potential adverse health effects resulting from exposure to APFO. This concern is addressed in the Other Issues portion of this document NPOES Permit Fact Sheet - October 7, 2003 DuPont Fayetteville Page 3 NC0003573 3.0 FACILITY INFORMATION 3.1 Outfall Summary Outfall 001 is an internal outfall and is the effluent from the biological wastewater treatment facility (see section 2.2.1 below). The treatment facility receives all sanitary wastewater, process stormwater, co -neutralized regenerate, as well as process wastewaters from Butacite, Dymetrol, Nafion, Teflon, and APFO. The applicable 414 subparts include D (thermoplastic resins) and I (end -of -pipe biological treatment). While the permitted flow is 2.0 MGD, the flow used for guideline application was 0.946 MGD. The long-term average production flow associated with this outfall was determined to be 0.863 MGD. However, the facility is expecting increased production associated with an expansion and is projecting process wastewater flows of 1.085 MGD. The previous permit limitations were developed using 0.946 MGD. As the facility is currently meeting these limits, and 0.946 MGD seems to be a good median between the long-term average flow and the projected flow, the limitations were maintained (thus determined using a flow of 0.946 MGD). Outfall 002 is the combined effluent to the Cape Fear River and includes all internal outfalls in addition to non -contact cooling water, boiler blowdown, and stormwater. Outfall 006 is an internal outfall consisting of Nafion low -biodegradable process wastewaters. The applicable 414 subparts include D and J (end -of -pipe non -biological treatment). The average process wastewater flow for this outfall is 0.036 MGD. Outfall 007 is an internal outfall consisting of APFO low -biodegradable process wastewaters. The applicable 414 subparts include H (special organic chemicals) and J. The average process wastewater flow for this outfall is 0.048 MGD. 3.2 wastewater Treatment 3.2.1 Liquid Train Process wastewater and stormwater from the various manufacturing areas are collected in the respective area sumps and ultimately conveyed via a gravity flow underground process sewer pipe to the site's central wastewater treatment plant (WWTP). Sanitary sewage is conveyed via a separate underground sewer system to the WWTP. The actual average now from the treatment facility is approximately 1.0 MGD. Untreated wastewater is commingled in the influent sump where it is then pumped to an 850,000 gallon equalization basin. The equalization basin is mixed with two floating submerged mixers. Three floating surface in the basin cool and aerate the incoming wastewater. A 175,000 gallon emergency retention tank is available for temporary storage of unsuitable wastewater. This unsuitable wastewater, which typically exhibits a high organic content or a chemical to which the activated sludge is not acclimated, is eventually treated in the WWTP at a rate that allows for proper biological treatment. Wastewater from the equalization basin is pumped to a 250,000 gallon pre -digester tank in which initial biological treatment with the activated sludge begins. The tank is aerated with a floating surface aerator as well as diffused air. The partially treated wastewater is then pumped to a 1.7 million gallon aeration tank. The aeration tank is provides the bulk of the treatment and is aerated by both a diffused aeration system and a floating Biomixer0 that injects air through submerged rotors. } Nk)ES Permit Fact Sheet - October 7, 2003 Page 4 DuPont Fayetteville NC0003573 The aerated wastewater is sent to two in -ground clarifiers operated in parallel. The clarified effluent is finally discharged through internally outfall 001 which is ultimately discharged to outfall. 002. 3.2.2 Solid Train The wasted sludge from the WWTP is sent to a dissolved air flotation unit, then to a 47,000 gallon sludge storage tank, and finally to a rotary filter for thickening. The thickened sludge is dewatered in a screw press and then dried in a steam -heated dryer. The dried sludge is transported off-site to a commercial landfill. 3.3 Compliance Summary A compliance download was conducted from DWQ's Basinwide Information Management System for the period January 2000 through August 2003. Three violations were noted for BOD during that time period. One can conclude that the facility is generally very well operated and maintained and remains in compliance with permit conditions. 4.0 PERMIT DEVELOPMENT • Effluent Limitations: The large 7Q10 flow of the Cape Fear River affords substantial dilution of the facility's effluent. As such, this is very much an effluent limited permitting scenario. Appropriate effluent guidelines have been applied using long-term average process wastewater flows (see outfall summary above and the attached spreadsheets summarizing guideline calculations). Instream Monitoring: This facility is a member of the Cape Fear River Basin Association. This association manages the collection and submittal of instream water quality data for its members. In recognition of this facility's participation, instream monitoring requirements are waived until such participation is suspended. Should participation end, instream monitoring requirements, articulated on the effluent limitations pages, will be immediately reinstated. 5.0 OTHER ISSUES 5.1 APFO APFO is recognized as a bio -persistent compound; it remains in the body or environment for extended periods of time after exposure. DuPont claims that its medical surveillance of employees and epidemiological data from others in industry support its conclusion that APFO does not pose a health concern to humans or animals at levels present in the workplace or environment. DuPont has used APFO for more than forty years and claims to have never observed health effects in workers. Furthermore, it is DuPont's assertion that the low volume usage poses neither an acute nor a chronic risk. While not identified as a developmental toxin, human carcinogen, or genotoxic compound, ongoing research is attempting to quantify the extent, if at all, of APFO's toxicity. NPIDES Permit Fact Sheet - October 7, 2003 DuPont Fayetteville Page 5 NC0003573 5.2 BCH Energy, Project BCH Energy entered into an agreement with DuPont a number of years ago to build a cogeneration facility on DuPont's Fayetteville plant site. The cogeneration facility was constructed and was intended to provide power to the grid and steam to DuPont. The project went into bankruptcy in 1998, and the project's facility and equipment housed on DuPont's plant site were sold. The facility is no longer in operation. 5.3 Outfall 002 Discharge Relocation During a drought condition in the summer of 1999 the DuPont effluent channel conveying the site's final wastewater discharge to the Cape Fear River experienced sloughing of the streambanks into the flowing effluent, resulting in excessive sediment discharge to the river. DuPont initiated a study to determine a cost effective remedy to the situation. The company is currently considering two options. Option 1 involves the relocation of outfall 002 via pipeline to the Cape Fear River upstream of Lock & Dam #3. Option 2 involves the relocation of outfall 002 via pipeline to the Cape Fear River further downstream. Relocation of the outfall above the Lock & Dam would necessitate a water quality/quantity modeling analysis. Such an analysis would certainly be considered a relatively low priority at present given the scarce modeling resources available to the Division and the number of TMDLs currently under development and on deck for development in the near future. 6.0 PROPOSED SCHEDULE FOR PERMIT ISSUANCE Draft Permit to Public Notice: October 15, 2003 Permit Scheduled to Issue: December 1, 2003 7.0 STATE CONTACT If you have any questions on any of the above information or on the attached permit, please contact Mark McIntire at (919) 733-5083, extension 508. Copies of the following are attached to provide further information on the permit development: • Limit calculations • Permit application • Draft Permit r 7vNPDES RECOMMENDATION BY: Signature Date REGIONAL OFFICE COMMENTS: REGIONAL RECOMMENDATION BY: Signature Date FACILITY DuPont-Fayetteville OCPSF Flow 0.946 MGD Outtall 001: flow is based on processes only 70105 791 cis Oavg 5676 cis Permitted Flow 2 MGD Limit Limit Federal or Standard Daily Monthly Daily Monthly State Aquatic Max avg Max avg Life Parameter ugn ug/I f/d #yd stdrd pg" Acenaphthene 59 22 0.465 0.174 Federal no stdrd Human Hhh Standard Allowable Organisms conc. Aquatic Life pgA pgn 990,00 no stdrd Human Hlth Allowable conc Organisms pgA 253599.68 Allowable Allowable Aquatic Life Human Hith Organisms 11/day #/day no stdrd 4226.661 Limit Based on: OCPSF Dally Max 0.465 #1d Dy Monthly Avg. #/day 0.174 Acenaphthylene 59 22 0.465 0.174 Federal no stdrd no stdrd no stdrd no sidrd no sidrd no sidrd OCPSF 0.465 #/day 0.174 Acrylonitrile (c) 242 96 1.909 0.757 Federal no stdrd 0.25 no stdrd 457.99 no stdrd 7.633 OCPSF 1.909 #/day 0.757 Anthracene 59 22 0.465 0.174 Federal no stdrd 40000.00. - no stdrd 10246451.61 no stdrd 170774.194 OCPSF 0.465 #/day 0.174 Benzene (c) 136 37 1.073 0.292 State no stdrd 71.40 :'. no stdrd 130802.50 no stdrd 2180.042 OCPSF 1.073 #/day 0.292 Begzo(a)anthracene (c, Pr 59 22 0.465 0.174 Federal no sidrd 0.018 no stdrd 32.98 no stdrd 0.550 OCPSF 0.465 #/day 0.174 3,4-Benzofluomnthene (c, 61 23 0.481 0.181 Federal no stdrd 0.0311 no stdrd 56.97 no stdrd 0.950 OCPSF 0.481 #/day 0.181 Benzo(k)fluoranthene (c,P 59 22 0.465 0.174 Federal no stdrd -0.0180, no stdrd 32.98 no stdrd 0.550 OCPSF 0.465 #/day 0.174 Benzo(a)pyrene (c, PAH) 61 23 0.481 0.181 Federal no stdrd 0,0314 no stdrd 56.97 no stdrd 0.950 OCPSF 0.481 #/day 0.181 Bis(2-ethyihexyl) phthalate 279 103 2.201 0.813 Federal no stdrd 2.20:. no stdrd 4030.33 no stdrd 67.172 OCPSF 2.201 #/day 0.813 Carbon Tetrachloride (c) 38 18 0.300 0.142 State no stdrd 4.42- no stdrd 8097.30 no stdrd 134.955 OCPSF 0.300 #/day 0.142 Chlorobenzene 28 15 0.221 0.118 Federal no sidrd .27000.00. no stdrd 5379387.10 no stdrd 89656.452 OCPSF 0.221 #/day 0.118 Chloroethane 268 104 2.114 0.821 Federal no sidrd no sidrd -. no stdrd no stdrd no stdrd no stdrd OCPSF 2.114 #/day 0.821 Chloroform (c) 46 21 0.363 0.166 Federal no sidrd 470 00 no stdrd 861024.84 no stdrd 14350.414 OCPSF 0.363 #/day 0.166 2-Chlorophenol 98 31 0.773 0.245 Federal no sidrd 150.00 no stdrd 38424.19 no stdrd 640.403 OCPSF 0.773 #/day 0.245 Chrysene (c, PAH) 59 22 0.465 0.174 Federal no stdrd 00180,' no stdrd 32.98 no stdrd 0.550 OCPSF 0.465 #/day 0.174 Di-n-butyl phthalate 57 27 0.450 0.213 Federal no stdrd no stdrd no stdrd no stdrd no stolid no stdrd OCPSF 0.450 #/d DY 0.213 1,2-Dichlorobenzene 163 77 1.286 0.608 Federal no stdrd 17000.00 no stdrd 4354741.94 no stdrd 72579.032 OCPSF 1.286 #/day 0.608 1,3-Dichlorobenzene 44 31 0.347 0.245 Federal no stdrd 960.00 no stdrd 245914.84 no stdrd 4098.581 OCPSF 0.347 #/day 0.245 1,4-Dichlorobenzene 28 15 0.221 0.118 Federal no stdrd 2600.00 `. no stdrd 666019.35 no sidrd 11100.323 OCPSF 0221 #/ Jay 0.118 1,1-Dichloroethane (c) 59 22 0.465 0.174 Federal no stdrd': no stdrd no sidrd no stdrd no stdrd no stdrd OCPSF 0.465 If Jay 0.174 1,2-Dichloroethane (c) 211 68 1.665 0.536 Federal no stdrd 3.70 no stdrd 6778.28 no stdrd 112.971 OCPSF 1.665 #/day 0.536 1,1-Dichloroethylene (c) 25 16 0.197 0.126 Federal no stdrd ` 3.20 no stdrd 5862.30 no stdrd 97.705 OCPSF 0.197 #/day 0.126 1,24rans-Dichloroethylene 54 21 0.426 0.166 Federal no stdrd 140000,00 no stdrd 35862580.65 no stdrd 597709.677 OCPSF 0.426 #/day 0,166 2,4-1)ichlorophenol 112 39 0.884 0.308 Federal no sidrd .200:00" no stdrd 74286.77 no stdrd 1238.113 OCPSF 0.884 #/day 0,308 1,2-Dichloropropane 230 153 1.815 1.207 Federal no stdrd 15.00 no stdrd 3842.42 no stdrd 64.040 OCPSF 1.815 #/day 1,207 1,3-Dich)oropropylene (c) 44 29 0.347 0.229 Federal no stdrd 1700.001.: no stdrd 3114345.16- no stdrd 51905.753 OCPSF 0.347 #/day 0.229 Diethyl phthalate 203 - 81 1.602 0.639 Federal no sidrd 44000.00 no stdrd 11271096.77 no stdrd 187851.613 OCPSF 1.602 #/day 0.639 2,4-Dimethylphenol 36 18 0.284 0.142 Federal no stdrd : 850.00 no stdrd 217737.10 no stdrd 3628.952 OCPSF 0.284 #/day 0.142 Dimethyl phthalate 47 19 0.371 0.150 Federal no stdrd 1100000:00 no stdrd 281777419.35 no stdrd 4696290.323 OCPSF 0.371 #(day 0.150 4,6-Dinino-o-cresol (2-Met 277 78 2.185 0.615 Federal no stdrd ' 280.00 no stdrd 71725.16 no stdrd 1195.419 OCPSF 2.185 #/day 0.615 2,4-Oindropheno1 123 71 0.970 0.560 Federal no stdrd 5300.00 no stdrd 1357654.84 no stdrd 22627.581 OCPSF 0.970 #/day 0.560 2,4-DiMrotoluena (c) 285 113 2.249 0.892 Federal no stdrd 3.40 no stdrd 870.95 no stdrd 14.516 OCPSF 2.249 #/day 0.892 2,6-Dinitrotoluene (c) 641 255 5.057 2.012 Federal no stdrd no stdrd '- no stdrd no stdrd no stdrd no stdrd OCPSF 5.057 #/day 2.012 Ethylbenzene 108 32 0.852 0.252 AQ/NOEC 325.000 , 29000.00- 83252.42 7428677.42 1387.540 123811.290 OCPSF 0.852 #/day 0.252 Flouranthene 68 25 0.536 0.197 Federal no stdrd 140.00 no stdrd 35862.58 no stdrd 597.710 OCPSF 0.536 _ #/day 0.197 Fluorene 59 22 0.465 0.174 Federal no stdrd 5300;00 no sidrd 1357654.84 no sidrd 22627.581 OCPSF 0.465 #/day 0.174 Hexachlorobenzene(c) 28 15 0.221 0.118 Federal no stdrd ..2190E-04 no stdrd 0.53 no stdrd 8.85E-03 CHRONIC 0.531 _pg/I _ Hexachlonobutadiene (c) 49 20 0.387 0.158 Federal no stdrd 18:00 no sidrd 32975.42 no sidrd 549.590 OCPSF 0.387 #/day 0.158 Hexachloroethans (c) 54 21 0.426 0.166 Federal no stdrd - 3.30.. no stdrd 6045.49 no stdrd 100.758 OCPSF 0.426 #/day 0.166 Methyl Chloride 190 86 1.499 0.679 Federal no stdrd no stdrd -- no stdrd no stdrd no stdrd no stdrd OCPSF 1.499 #/day 0.679 Methylene Chloride (c) 89 40 0.702 0.316 Federal no stdrd 590.00. no sidrd 1080860.97 no sidrd 18014.349 OCPSF 0.702 #/day 0.316 Naphthalene 59 22 0.465 0.174 Federal no stdrd no stdrd - no stdrd no stdrd no stdrd no stdrd OCPSF 0.465 #/day 0.174 Nitrobenzene 68 27 0.536 0.213 Federal no stdrd 690.00 , no sidrd 176751.29 no stdrd 2945.855 OCPSF 0.536 #/day 0.213 2.Nitrophenol 69 41 0.544 0.323 Federal no stdrd ' .. no stdrds:. no stdrd no stdrd no stdrd no stdrd OCPSF 0.544 #/day 0.323 4-Nitrophenol 124 72 0.978 0.568 Federal no stdrd no stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.978 #/day 0.568 Phenanthrene 59 22 0.465 0.174 Federal no stdrd no.stdrd -.`. no stdrd no stdrd no stdrd no stdrd OCPSF 0.465 #/day 0.174 Phenol 26 15 0.205 0.118 Federal no stdrd 1700000.00- no stdrd 435474193.55 no stdrd 7257903.226 OCPSF 0.205 #/day 0.118 Pyrene 67 25 0.529 0.197 Federal no stdrd .:4000€00 no stdrd 1024645.16 no stdrd 17077.419 OCPSF 0.529 #/day 0.197 Tetrachloroethylene (c) 56 22 0.442 0.174 Federal no stdrd 330 no stdrd 6045.49 no stdrd 100.758 OCPSF 0.442 #/day 0.174 Toluene 80 26 0.631 0.205 State/AQ 11.000 200000.00: 2817.77 51232258.06 46.963 853870.968 OCPSF 0.631 #/day 0.205 1,2,4-Trichlorobenzene 140 68 1.105 0.536 Federal no stdrd 940.00 no stdrd 240791.61 no stdrd 4013.194 OCPSF 1.105 #/day 0.536 1,1,1-Trichloroethane 54 21 0.426 0.166 Federal no sidrd I. no stdrd no sidrd no sidrd no sidrd no sidrd OCPSF 0.426 #/day 0.166 1,1,24lichloroeihane (c) 54 21 0.426 0.166 Federal no sidrd 1600 '- no stdrd 29311.48 no sidrd 488.525 OCPSF 0.426 #/day 0.166 Trichlororethylene (c) 54 21 0.426 0.166 State no stdrd 30.00 _ no stdrd 54959.03 no stdrd 915.984 OCPSF 0,426 #/d Dy 0.166 Vinyl Chloride (c) 268 104 " Total Chromium 2770 1110 " Total Copper 3380 1450 " Total Cyanide 1200 420 " Total Lead 690 320 " Total Nickel 3980 1690 "Total Zinc' 2610 1050 'Total Zinc for Rayon Fiber Manufacture that uses the viscose process and Acrylic Fiber Manufacture that uses zinc 2.114 0.821 State no stdrd 0.000 0.000 State 50.000 0.000 0.000 Action level 7.000 0.000 0.000 State 5.000 0.000 0.000 State 25.000 0.000 0.000 State 88.000 0.000 0.000 Action level 50.000 " Metals should only be limited if process contains metal bearing wasteflow. Cyanide should only be limited it 530.00 -. no stdrd no stdrd 12808.06 no stdrd 1793.13 no stdrd 1280.81 no stdrd 6404.03 no stdrd 22542.19 50.00 12808.06 Total metal bearing wasteflov Total cyanide bearing wastefl 970942.90 no stdrd no stdrd no stdrd no stdrd no stdrd 12808.06 0.00 0.00 no stdrd 213.468 29.885 21.347 106.734 375.703 213.468 16182.382 no stdrd no stdrd no stdrd no stdrd no stdrd 213.468 OCPSF OCPSF OCPSF OCPSF OCPSF OCPSF OCPSF 2,114 0.000 0.000 0.000 0.000 0.000 0.000 #/day #/day #/day #/day #/day #/day #/day 0.821 0.000 0.000 0.000 0.000 0.000 0.000 chloride/solvent process is 6,796 ug/L and process contains cyanide bearing wasteflow 3,325 ug/L for maximum for any one day and maximum for monthly average, respectively. 10/7/03 t Parameter ugA u911 #!d #!d stdrd Ng" p911 Pgll pgA #/day #/day #1 da 47 19 0.014 0.006 FACI>LITY DuPont -Fayetteville 990.00 I' no stdrd OCPSF Flow 0.036 MGD Outfall 006: flow is based on processes only 0.014 7010s 791 cis 19 0.014 Qavg 5676 cis no stdrd '.. no stdrd Permitted Flow 2 MGD OCPSF Human Hlth Human Hlth Allowable Allowable #/day 0.006 Acrylonitrile (c) 232 Limit Limit Federal or Standard Standard Allowable Allowable Aquatic Life Human Hith Limit Daily Monthly 0.028 Daily Monthly Daily Monthly State Aquatic Organisms cone. Aquatic cone Organisms Based Max Avg. 457.99 max avg max avg Life Life Organisms on: Acenaphthene 47 19 0.014 0.006 Federal no stdrd 990.00 I' no stdrd 253599.68 no stdrd 4226.661 OCPSF 0.014 Y #/day 0.006 Acenaphthylene 47 19 0.014 0.006 Federal no stdrd no stdrd '.. no stdrd no stdrd no stdrd no stdrd OCPSF 0.014 #/day 0.006 Acrylonitrile (c) 232 94 0.070 0.028 Federal no stdrd 0.25 no stdrd 457.99 no stdrd 7.633 OCPSF 0.070 #/day 0.028 Anthracene 47 19 0.014 0.006 Federal no stdrd 40000.00 no stdrd 10246451.61 no stdrd 170774.194 OCPSF 0.014 #/day 0.006 Benzene (c) 134 57 0.040 0.017 State no stdrd 71.40 no stdrd 130802.50 no stdrd 2180.042 OCPSF 0.040 #/day 0.017 Benzo(a)anthracene (c, P, 47 19 0.014 0.006 Federal no stdrd : : 0.018 no stdrd 32.98 no stdrd 0.550 OCPSF 0.014 #(day 0.006 3,4-Benzofluoranthene (c, 48 20 0.014 0.006 Federal no sidrd 0.0313 - no sidrd 56.97 no stdrd 0.950 OCPSF 0.014 #/day 0.006 Benzo(k)fluoranthene (c,P 47 19 0.014 0.006 Federal no stdrd 0.0180 no stdrd 32.98 no stdrd 0.550 OCPSF 0.014 #/day 0.006 Benzo(a)pyrene (c, PAH) 48 20 0.014 0.006 Federal no stdrd 0.0311 no stdrd 56.97 no stdrd 0.950 OCPSF 0.014 #/day 0.006 Bis(2-ethylhexyl) phthalate 258 95 0.077 0.029 Federal no stdrd : 2.20 no stdrd 4030.33 no stdrd 67.172 OCPSF 0.077 #/day 0.029 Carbon Tetrachloride (c) 380 142 0.114 0.043 State no stdrd 4.42 no sidrd 8097.30 no stdrd 134.955 OCPSF 0.114 #/day 0.043 Chlorobenzene 380 142 0.114 0.043 Federal no stdrd :21000.00 no stdrd 5379387.10 no stdrd 89656.452 OCPSF 0.114 #/day 0.043 Chloroethane 295 110 0.089 0.033 Federal no stdrd no stdrd : no stdrd no stdrd no stdrd no stdrd OCPSF 0.089 #/day 0.033 Chloroform (c) 325 111 0.098 0.033 Federal no stdrd ':: 470.00.. no stdrd 861024.84 no stdrd 14350.414 OCPSF 0.098 #/day 0.033 Chrysene (c, PAH) 47 19 0.014 0.006 Federal no stdrd 0.01`80: no stdrd 32.98 no stdrd 0.550 OCPSF 0.014 #/day 0.006 Di -n -butyl phthalate 43 20 0.013 0.006 Federal no stdrd no: stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.013 #/day 0.006 1,2 -Dichlorobenzene 794 196 0.238 0.059 Federal no stdrd 17000;00 c. no stdrd 4354741.94 no stdrd 72579.032 OCPSF 0.238 #/day 0.059 1,3 -Dichlorobenzene 380 142 0.114 0.043 Federal no stdrd '960,00 no stdrd 245914.84 no stdrd 4098.581 OCPSF 0.114 #/day 0.043 1,4 -Dichlorobenzene 380 142 0.114 0.043 Federal no stdrd 2600.00 no stdrd 666019.35 no stdrd 11100.323 OCPSF 0.114 #/day 0.043 1,1-Dichloroethane (c) 59 22 0.018 0.007 Federal no stdrd : Cno. stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.018 #/day 0.007 1,2-Dichloroethane (c) 574 180 0.172 0.054 Federal no stdrd 3.70 no sidrd 6778.28 no stdrd 112.971 OCPSF 0.172 #/day 0.054 1,1-Dichloroethylene (c) 60 22 0.018 0.007 Federal no stdrd " 3,20 :.: no stdrd 5862.30 no stdrd 97.705 OCPSF 0.018 #/day 0.007 1,2-trans-Dichloroethylene 66 25 0.020 0.008 Federal no stdrd 140000.00 no stdrd 35862580.65 no stdrd 597709.677 OCPSF 0.020 #/day 0.008 1,2-Dichloropropane 794 196 0.238 0.059 Federal no sidrd -15:00 no sidrd 3842.42 no stdrd 64.040 OCPSF 0.238 #/day 0.059 1,3-Dichloropropylene (c) 794 196 0.238 0.059 Federal no stdrd "1700.00 no stdrd 3114345.16 no sidrd 51905.753 OCPSF 0.238 #/day 0.059 Diethyl phthalate 113 46 0.034 0.014 Federal no stdrd :44000.00 no stdrd 11271096.77 no stdrd 187851.613 OCPSF 0.034 #/day 0.014 2,4 -Dimethylphenol 47 19 0.014 0.006 Federal no stdrd 850.00 no stdrd 217737.10 no stdrd 3628.952 OCPSF 0.014 #/day 0.006 Dimethyl phthalate 47 19 0.014 0.006 Federal no stdrd 1100000.00 no stdrd 281777419.35 no stdrd 4696290.323 OCPSF 0.014 #/day 0.006 4,6-Dinitro-o-cresol (2 -Mel 277 78 0.083 0.023 Federal no stdrd 280.00 no stdrd 71725.16 no stdrd 1195.419 OCPSF 0.083 If/day 0.023 2,4-Dinitrophenol 4291 1207 1.288 0.362 Federal no stdrd :5300:00 no stdrd 1357654.84 no stdrd 22627.581 OCPSF 1.288 #/day 0.362 Ethylbenzene 360 142 0.114 0.043 AQ/NOEC 325.000 29000.00. 83252.42 7428677.42 1387.540 123811.290 OCPSF 0.114 #/day 0.043 Flouranthene 54 22 0.016 0.007 Federal no sidrd 140:00 no sidrd 35862.58 no stdrd 597.710 OCPSF 0.016 #/day 0.007 _ Fluorene 47 19 0.014 0.006 Federal no stdrd '5300.00 no stdrd 1357654.84 no stdrd 22627.581 OCPSF 0.014 #/day 0.006 Hexachlorobenzene (c) 794 196 0.238 0.059 Federal no stdrd 2.90E-04.. no stdrd 0.53 no stdrd 8.85E-03 CHRONIC 0.531 ug/I Hexachlorobutadiene (c) 380 142 0.114 0.043 Federal no stdrd 18.00 no stdrd '32975.42 no stdrd 549.590 OCPSF 0.114 #/day 0.043 Hexachloroethane (c) 794 196 0.238 0.059 Federal no stdrd 3.30 no stdrd 6045.49 no stdrd 100.758 OCPSF 0.238 #/day 0.059_ Methyl Chloride 295 110 0.089 0.033 Federal no stdrd no stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.089 #/day 0.033 Methylene Chloride (c) 170 36 0.051 0.011 Federal no stdrd 590.00 no stdrd 1080860.97 no stdrd 18014.349 OCPSF 0.051 #/day 0.011 Naphthalene 47 19 0.014 0.006 Federal no stdrd no stdrd .: no stdrd no stdrd no stdrd no stdrd OCPSF 0.014 #/day 0.006 Nilrobenzene 6402 2237 1.922 0.672 Federal no stdrd 690.00 no stdrd 176751.29 no stdrd 2945.855 OCPSF 1.922 #/day 0.672 2-Nitrophenol 231 65 0.069 0.020 Federal no stdrd - dno stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.069 #/day 0.020 4-Nitrophenol 576 162 0.173 0.049 Federal no stdrd no stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.173 #/day 0.049 Phenanthrene 47 19 0.014 0.006 Federal no stdrd ' no stdrd - no stdrd no stdrd no stdrd no stdrd OCPSF 0.014 #/day 0.006 Phenol 47 19 0.014 0.006 Federal no stdrd 1700000.00 no stdrd 435474193.55 no stdrd 7257903.226 OCPSF 0.014 #/day 0.006 Pyrene 48 20 0.014 0.006 Federal no sidrd 4000:00 no sidrd 1024645.16 no stdrd 17077.419 OCPSF 0.014 #/day 0.006 Tetrachloroethylene (c) 164 52 0.049 0.016 Federal no stdrd 3.30 no stdrd 6045.49 no stdrd 100.758 OCPSF 0.049 #/day 0.016 Toluene 74 28 0.022 0.008 State/AQ 11.000 200000:00 2817.77 51232258.06 46.963 853870.968 OCPSF 0.022 #/day 0.008 1,2,4-Trichlorobenzene 794 196 0.238 0.059 Federal no stdrd -940.00 no stdrd 240791.61 no stdrd 4013.194 OCPSF 0.238 #/day 0.059 1,1,1 -Trichloroethane 59 22 0.018 0.007 Federal no stdrd no stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.018 #/day 0.007 1,1,2 -trichloroethane (c) 127 32 0.038 0.010 Federal no sidrd 18:D0 no sidrd 29311.48 no stdrd 488.525 OCPSF 0.038 #/day 0.010 Trichlororethylene (c) 69 26 0.021 0.008 State no stdrd 30.00..'. no stdrd 54959.03 no stdrd 915.984 OCPSF 0.021 #/day 0.008 Vinyl Chloride (c) 172 97 0.052 0.029 State no stdrd -:530.00 no stdrd 970942.90 no stdrd 16182.382 OCPSF 0.052 #(day 0.029 ** Total Chromium " Total Copper *` Total Cyanide *" Total Lead "Total Nickel "Total Ziac' 2770 3380 1200 690 3980 2610 1110 1450 420 320 1690 1050 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 State Action level State State State Action level 50.000 7.000 5.000 25.000 88.000 50.000 no stdrd no stdrd no stdrd no stdrd no stdrd 50.00 12808.06 1793.13 1260.81 6404.03 22542.19 12806.06 no stdrd no stdrd no stdrd no stdrd no stdrd 12808.06 213.468 29.885 21.347 106.734 375.703 213.468 no stdrd no stdrd no stdrd no stdrd no stdrd 213.468 OCPSF OCPSF OCPSF OCPSF OCPSF OCPSF 0.000 0.000 0.000 0.000 0.000 0.000 #/day 0.000 #/day 0.000 #/day 0.000 #/day 0.000 #/day 0.000 #/day 0.000 *Total Zinc for Rayon Fiber Manufacture '* Metals should only be limited it Total metal bearing wasteflo% 0.00 that uses the viscose process and Acrylic process contains metal bearing wasteflow. Fiber Manufacture that uses zinc Cyanide should only be limited if Total cyanide bearing wastef 0.00 chloride/solvent process is 6,796 ug/l- and process contains cyanide bearing wasteflow. 3,325 ug/L for maximum for any one day and maximum for monthly average, respectively. Note FACILITY DuPont -Fayetteville OCPSF Flow 0.048 MGD Outfall 007: flow is based on processes only 70105 791 cis Qavg 5676 cis Permitted Flow 2 MGD Limit Limit Federal or Standard Daily Monthly Daily Monthly State Aquatic max avg max avg Life Parameter u9/1 ug/l #/d #/d stdrd pg/I Human Hlth Standard Allowable Organisms cone. Aquatic Life N9/1 pgA Human Hlth Allowable cone Organisms NgA Allowable Allowable Aquatic Life Human Hlth Organisms #/day #/day Limit Based on: Daily Max Monthly Avg. Vday Acenaphthene 47 19 0.019 0.008 Federal no stdrd 990.00' '' no stdrd 253599.68 nostdrd 4226.661 OCPSF 0.019 #/day 0.008 Acenaphthylene 47 19 0.019 0.008 Federal no stdrd no stdrd nostdrd no stdrd nostdrd nostdrd OCPSF 0.019 #/day 0.008 Acrylonitrile (c) 232 94 0.093 0.038 Federal no stdrd 0.25 no stdrd 457.99 no stdrd 7.633 OCPSF 0.093 #/day 0.038 Anthracene 47 19 0.019 0.008 Federal no stdrd 40000.00 no stdrd 10246451.61 no stdrd 170774.194 OCPSF 0.019 #/day 0.008 Benzene (c) 134 57 0.054 0.023 State no stdrd ,_:.71.40:.1: no stdrd 130802.50 no stdrd 2180.042 OCPSF 0.054 #/day 0.023 Benzo(a)anthracene (c, Pi 47 19 0.019 0.008 Federal no stdrd 0.018" : no stdrd 32.98 no stdrd 0.550 OCPSF 0.019 #/day 0.008 3,4-Benzofluoranthene (c, 48 20 0.019 0.008 Federal no stdrd 0.031.1- no stdrd 56.97 no stdrd 0.950 OCPSF 0.019 #/day 0.008 Benzo(k)fluoranthene (c,P, 47 19 0.019 0.008 Federal no stdrd 0.0180 no stdrd 32.98 no stdrd 0.550 OCPSF 0.019 #/day 0.008 Benzo(a)pyrene (c, PAH) 48 20 0.019 0.008 Federal no stdrd 0.0311, no stdrd 56.97 no stdrd 0.950 OCPSF 0.019 #/day 0,008 Bis(2-ethylhexyl) phthalate 258 95 0.103 0.038 Federal no stdrd 2.20 no stdrd 4030.33 no stdrd 67.172 OCPSF 0.103 #/day 0.038 Carbon Tetrachloride (c) 380 142 0.152 0.057 State no stdrd 4.42 - no stdrd 8097.30 no stdrd 134.955 OCPSF 0.152 #/day 0.057 Chlorobenzene 380 142 0.152 0.057 Federal no stdrd 21000.00 ' no stdrd 5379387.10 no stdrd 89656.452 OCPSF 0.152 #/day 0.057 Chloroethane 295 110 0.118 0.044 Federal no stdrd no stdrd ' no stdrd no stdrd no stdrd no stdrd OCPSF 0.118 #/day 0.044 Chloroform (c) 325 111 0.130 0.044 Federal nostdrd 470.00 " nostdrd 861024.84 no stdrd 14350.414 OCPSF 0.130 #/day 0.044 Chrysene (c, PAH) 47 19 0.019 0.008 Federal no stdrd 0.0180 no stdrd 32.98 no stdrd 0.550 OCPSF 0.019 #/day 0.008 Di -n -butyl phthalate 43 20 0.017 0.008 Federal no stdrd no stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.017 #/day 0.008 1,2 -Dichlorobenzene 794 196 0.318 0.078 Federal no stdrd 17000.00 no stdrd 4354741.94 no stdrd 72579.032 OCPSF 0.318 #/day 0.078 1,3 -Dichlorobenzene 380 142 0.152 0.057 Federal no stdrd 960.00: '. no stdrd 245914.84 no stdrd 4098.581 OCPSF 0.152 #/day 0.057 1,4 -Dichlorobenzene 380 142 0.152 0.057 Federal no stdrd 2600:00, no stdrd 666019.35 no stdrd 11100.323 OCPSF 0.152 #/day 0.057 1,1-Dichloroethane (c) 59 22 0.024 0.009 Federal nostdrd no stdrd no stdrd no stdrd no stdrd no stdrd OCPSF 0.024 #/day 0.009 1,2-Dichloroethane (c) 574 180 0.230 0.072 Federal no stdrd 3.70 no stdrd 6778.28 no stdrd 112.971 OCPSF 0.230 #/day 0.072 1,1-Dichloroethylene (c) 60 22 0.024 0.009 Federal no stdrd 3.20 -' no stdrd 5862.30 no stdrd 97.705 OCPSF 0.024 #/day 0.009 1,2-trans-Dichloroethylene 66 25 0.026 0.010 Federal no stdrd 140000.00-. no stdrd 35862580.65 no stdrd 597709.677 OCPSF 0.026 #(day 0.010 1,2-Dichloropropane 794 196 0.318 0.078 Federal no stdrd 15.00 '- no stdrd 3842.42 no stdrd 64.040 OCPSF 0.318 #/day 0.078 1,3-Dichloropropylene (c) 794 196 0.318 0.078 Federal no stdrd 1700,00' no stdrd 3114345.16 no stdrd 51905.753 OCPSF 0.318 #/day 0.078 Diethyl phthalate 113 46 0.045 0.018 Federal no stdrd 44000.00 no stdrd 11271096.77 no stdrd 187851.613 OCPSF 0.045 #(day 0.018 2,4 -Dimethylphenol 47 19 0.019 0.008 Federal no stdrd 850.00 no stdrd 217737.10 no stdrd 3628.952 OCPSF 0.019 #/day 0.008 Dimethyl phthalate 47 19 0.019 0.008 Federal no stdrd 1100000.00 no stdrd 281777419.35 no stdrd 4696290.323 OCPSF 0.019 #/day 0.008 4,6-Dinitro-o-cresol (2 -Met 277 78 0.111 0.031 Federal no stdrd 280.00-: r no stdrd 71725.16 no stdrd 1195.419 OCPSF 0.111 #/day 0.031 2,4-Dinitrophenol 4291 1207 1.718 0.483 Federal no stdrd 5300.00 no stdrd 1357654.84 no stdrd 22627.581 OCPSF 1,718 #/day 0.483 Ethylbenzene 380 142 0.152 0.057 AQ/NOEC 325.000 29000.00 : 83252.42 7428677.42 1387.540 123811.290 OCPSF 0.152 #/day 0.057 Flouranthene 54 22 0.022 0.009 Federal no stdrd 140.00 no stdrd 35862.58 no stdrd _ 597.710 OCPSF 0.022 #/day 0.009 Fluorene 47 19 0.019 0.008 Federal no stdrd 5300.00 no stdrd 1357654.84 _ no stdrd 22627.581 OCPSF 0.019 #/day 0.008 Hexachlorobenzene (c) 794 196 0.318 0.078 Federal no stdrd 2.90E-04 no stdrd 0.53 no stdrd 8.85E-03 CHRONIC 0.531 ug/I - Hexachlorobutadiene (c) 380 142 0.152 0.057 Federal no stdrd 18.00 : no stdrd 32975.42 no stdrd 549.590 OCPSF 0.152 #/day 0.057 Hexachloroethane (c) 794 196 0.318 0.078 Federal no stdrd 3.30: no stdrd 6045.49 no stdrd 100.758 OCPSF 0.318 #/day 0.078 Methyl Chloride 295 110 0.118 0.044 Federal no stdrd no stdrd S '; no stdrd no stdrd no stdrd no stdrd OCPSF 0.118 #/day 0.044 Methylene Chloride (c) 170 36 0.068 0.014 Federal no stdrd 590.00' _ no stdrd 1080860.97 no stdrd 18014.349 OCPSF 0,068 #jday 0.014 Naphthalene 47 19 0.019 0.008 Federal no stdrd no stdrd'. ; no stdrd no stdrd no stdrd no stdrd OCPSF 0.019 #/day 0.008 Nitrobenzene 6402 2237 2.563 0.896 Federal no stdrd 690.00''.' no stdrd 176751.29 no stdrd 2945.855 OCPSF 2.563 4f/day 0.896 2-Nitrophenol 231 65 0.092 0.026 Federal nostdrd no stdrd ; no stdrd no stdrd no stdrd no stdrd OCPSF 0.092 #/day 0.026 4-Nitrophenol 576 162 0.231 0.065 Federal no stdrd no stdrd' ` no stdrd no stdrd no stdrd no stdrd OCPSF 0,231 #/day 0.065 Phenanthrene 47 19 0.019 0.008 Federal no stdrd no stdrd ': no stdrd no stdrd no stdrd no stdrd OCPSF 0.019 #/day 0.008 Phenol 47 19 0.019 0.008 Federal no stdrd 1700000.00. no stdrd 435474193.55 nostdrd 7257903.226 OCPSF 0.019 #/day 0.008 Pyrene 48 20 0.019 0.008 Federal nostdrd 4000.00'. no stdrd 1024645.16 no stdrd 17077.419 OCPSF 0.019 #/day 0.008 Tetrachloroethylene (c) 164 52 0.066 0.021 Federal no stdrd 3.30 '. no stdrd 6045.49 nostdrd 100.758 OCPSF 0.066 #/day 0.021 Toluene 74 28 0.030 0.011 State/AQ 11.000 200000.00 2817.77 51232258.06 46.963 853870.968 OCPSF 0.030 #jday 0.011 1,2,4-Tdchlorobenzene 794 196 0.318 0.078 Federal no stdrd 940.00 `. no stdrd 240791.61 no stdrd 4013.194 OCPSF 0.318 #/day 0.078 1,1,1 -Trichloroethane 59 22 0.024 0.009 Federal no stdrd no stdrd' no stdrd no stdrd no stdrd no stdrd OCPSF 0.024 #jday 0.009 1,1,2 -trichloroethane (c) 127 32 0.051 0.013 Federal no stdrd 16.00 no stdrd 29311.48 no stdrd 488.525 OCPSF 0.051 #jday 0.013 Trichlororethylene (c) 69 26 0.028 0.010 State no stdrd - :''300 no stdrd 54959.03 no stdrd 915.984 OCPSF 0.028 #/day 0.010 Vinyl Chloride (c) 172 97 0.069 0.039 State no stdrd 530.00.. no stdrd 970942.90 no stdrd 16182.382 OCPSF 0.069 #jday 0,039 *' Total Chromium 2770 1110 "Total Copper 3380 1450 ** Total Cyanide 1200 420 '* Total Lead 690 320 "Total Nickel 3980 1690 " Total Zinc* 2610 1050 *Total Zinc for Rayon Fiber Manufacture that uses the viscose process and Acrylic Fiber Manufacture that uses zinc 0.000 0.000 State 50.000 0.000 0.000 Action level 7.000 0.000 0.000 State 5.000 0.000 0.000 State 25.000 0.000 0.000 State 88.000 0.000 0.000 Action level 50.000 " Metals should only be limited if process contains metal bearing wasteflow. Cyanide should only be limited if no stdrd 12808.06 no stdrd 1793.13 no stdrd 1280.81 no stdrd 6404.03 no stdrd 22542.19 50.00 12808.06 Total metal bearing wastefloo Total cyanide bearing wastefl no stdrd no stdrd no stdrd no stdrd no stdrd 12808.06 0.00 0.00 213.468 29.885 21.347 106.734 375.703 213.468 no stdrd no stdrd no stdrd no stdrd no stdrd 213.468 OCPSF OCPSF OCPSF OCPSF OCPSF OCPSF 0.000 0.000 0.000 0.000 0.000 0.000 #/day 0.000 #jday, 0.000 #/day 0.000 #/day 0.000 #jday 0.000 #/day 0.000 chloride/solvent process is 6,796 ug/L and process contains cyanide bearing wasteflow 3,325 ug/L for maximum for any one day and maximum for monthly average, respectively. w m o o-� '-a a 0 > > g ° O W o of o Q > in 2 6 o _ 0 z Z � U U v � o� Cb o) 4) w N a x O w c� Z � d a� w m o o-� '-a a 0 > > g ° O W o of o Q > in 2 6 o _ 0 z Z � U U v � o� Cb o) 4) w N a x U U w w w Z � d a� O m g g 0 ¢' a' o >1. r Q o 0 0 0 LU M U j 00 5 00 M N J U F- N M M co O O J Ln — r LL �O o 0 O� zw a o2 _ U Z Y Y X w N N N d 3 3 3 W X X X LL. M M 0 Zr- N _O w O OO O ~ ~ N N M 0 0 CN O O U U U o� Cb o) 4) � O 0 04 0 0 tw- o o w Q o 0 0 a m m m Z O F C N c N C N Q 7 7 7 O J w w W J J LL (L O O O O O 0p 0 N N 0C) N f- a w O o o r. Dupont Fluoroproducts NC0003573 Bladen County 40 CFR 414 Application Outfall 001 Process Flow - 0.946 MGD) Subpart D (mg/L) Daily Max Monthly Avg. BOD 64 24 TSS 130 40 Outfall 006 Process Flow - 0.036 MGD) Subpart D (mg/L) Daily Max Monthly Avg. BOD 64 24 TSS 130 40 Outfall 007 Process Flow - 0.048 MGD) Subpart D (mg/L) Daily Max Monthly Avg. BOD 120 45 TSS 183 57 Allocation (lbs/day) Daily Max Monthly Avg. BOD 508.2 191.3 TSS 1030 317.8 Allocation (lbs/day) Daily Max Monthly Avg. BOD 19.2 7.2 TSS 39 12 Allocation (lbs/day) Daily Max Monthly Avg. BOD 48 18 TSS 73.3 22.8 DIVISION OF WATER QUALITY January 15, 2002 MEMORANDUM TO: David Goodrich, Supervisor NPDES Permitting and Engineering Unit FROM: Gadtler nvironmental Engineer t �r ov— r , FayeYeional Office J THROUGH: Paul Quality Regional Supervisor SUBJECT: Renewal of NPDES Permit E.I. DuPont de Nemours & co., Inc., Fayetteville Works (near Duart) NPDES Permit No. NCO03573 Bladen County Please find enclosed the staff report and recommendations of the Fayetteville Regional Office concerning the renewal of subject NPDES Permit. If you have any questions or require any further information, please advise. PER:GD/bs Enclosure cc: Kitty Kramer SOC PRIORITY PROJECT: YES NO X If Yes, SOC No. To: NPDES Permits and Engineering Unit Water Quality Section Attention: Mike Templeton Date: January 15, 2002 NPDES STAFF REPORT AND RECOMMENDATION COUNTY: Bladen Permit No. NC 0003573 PART I - GENERAL INFORMATION 1. Facility and Address: E.I. DuPont de Nemours & Co., Inc. 22828 NC Highway 87 W Fayetteville, NC 28306 2. Date of Investigation: November 19, 2001 3. Report Prepared by: Grady Dobson, Environmental Engineer, FRO r 4. Persons Contacted and Telephone Number: Michael Johnson, Environmental Coordinator E.I. DuPont, Fayetteville Works 910-678-1155 Mr. Robert Geddie, ORC 910-678-1219 5. Directions to Site: This facility is located at the Bladen -Cumberland County line, between Highway 87 and the Cape Fear River. 6. Discharge Point(s), List for all discharge points: Latitude: 34° 49'52" Longitude: 78149'00" Attach a USGS map extract and indicate treatment facility site and discharge point on map. U.S.G.S. map excerpt indicating treatment facility site and discharge point attached. U.S.G.S. Quad No. H 23 -SE U.S.G.S. Quad Name: Duart. NC 7. Site size and expansion area consistent with application? X Yes — No If No, explain. DuPont owns approximately 2,600 acres at this site. 8. Topography and relationship to flood plain: Relatively flat. 9. Location of nearest dwelling: None within 1,000 feet PART I - GENERAL INFORMATION (continued) 10. Receiving stream or affected surface waters: Cape Fear River. a. Classification: C b. River Basin and Subbasin No.: 03-06-16 C. Describe receiving stream features and pertinent downstream uses: The combined waste discharge from this facility flow is a wood lined channel installed as an effluent and storm water conveyance. This combined flow discharges over a fabri-formed concrete lined ditch until velocities are diminished and thence to the remainder of the effluent channel. Under normal (dry) conditions, this facility produces the flow in the effluent channel. The Cape Fear River is located approximately 2,500 feet downstream. (The discharge point has historically been indicated as the main stem of the Cape Fear River.) PART II - DESCRIPTION OF WASTES AND TREATMENT WORKS a. Volume of wastewater to be permitted: 2.0 MGD (Ultimate Design Capacity) of the treatment plant, discharge point 001. A separate discharge (002) is not flow limited. b. What is the current permitted capacity of the Wastewater Treatment facility? 2.0 MGD C. Actual treatment capacity of the current facility (current design capacity). 2.0 MGD d. Date(s) and construction activities allowed by previous Authorizations to Construct issued in the previous two (2) years. N/A The existing or substantially constructed wastewater treatment facilities: Process wastewater and stromwater from the various manufacturing areas are collected in the respective area sumps and ultimately conveyed via a gravity flow underground process sewer pipe to the site's central wastewater treatment plant (WWTP). Sanitary sewage is conveyed via a separate underground sewer system to the WWTP. The permitted flowrate of the WWTP is 2.0 MGD, with an actual average flowrate of approximately one (1) MGD. This untreated wastewater is commingled in the WWTP Influent Sump where it is pumped to an 850,000 -gallon Equalization Basin. The Equalization Basin is mixed with two floating mixers. Three (3) floating surface aerators in the basin cool and aerate the incoming wastewater. PART II - DESCRIPTION OF WASTES AND TREATMENT WORKS (continued) A 175,000 -gallon Emergency Retention Tank is available for temporary storage of unsuitable wastewater. This unsuitable wastewater, which typically exhibit a high organic loading or a chemical to which the WWTP activated sludge is not acclimated, is eventually treated in the WWTP at a rate that allows for proper biological treatment. Wastewater from the Equalization Basin is pumped to a 250,000 -gallon Predigester Tank in which initial biological activity with the WWTP activated sludge begins. The Predigester Tank is aerated with both a floating surface aerator and diffused air. The partially treated wastewater from the Predigester Tank is pumped to a 1,700,00 -gallon Aeration Tank, The Aeration Tank is the site of the majority of the biological activity. The Aeration Tank is aerated by both a diffused air system located in the bottom of the tank, and by a floating Biomixer® that injects air through submerged rotors. The biologically treated wastewater is then sent to two (2) in -ground clarifiers (119,000 -gallons and 168,000 -gallons respectively) in parallel. The clarified treated effluent is discharged to and through Outfall 001. The wasted sludge is sent to a Dissolved Air Flotation (DAF) unit, then to a 47,000 -gallon Sludge Storage Tank, and finally to a Rotary Filter for thickening. The thickened sludge is dewatered in a Screw Press, and then dried in a steam -heated dryer. The dried sludge is transported off- site to a commercial landfill. Non -contact process cooling water and non -process stormwater are conveyed via surface ditches to the site's Woodlined Ditch. In addition, excess river water flow and Outfall 001 effluent are discharged directly to the Woodlined Ditch. The combined, total flow of water from the site is discharged and monitored at Outfall 002. The Outfall 002 flow averaged 14.5 MGD during the period from 1996 to 2000. (See attached for Outfall Numbering Scheme for new NPDES Permit.) f. Please provide a description of proposed wastewater treatment facilities: None anticipated g. Possible toxic impacts to surface waters: N/A h. Pretreatment Program (POTWs only): N/A In development Approved _ Should be required Not needed PART II - DESCRIPTION OF WASTES AND TREATMENT WORKS (continued) 2. Residuals handling and utilizing/disposal scheme: a. If residuals are being land applied, please specify DWQ Permit No. Residual Contractor: Telephone: N/A b. Residuals stabilization: PSRP PFRP Other C. Landfill: The dried sludge produced at this facility is shipped to Waste Industries, Inc., Subtitle D landfill located east of Roseboro in Sampson County (see Sludge Management Plan). d. Other disposal/utilization scheme (specify): 3. Treatment plant classification (attach completed rating sheet): Class III 4. SIC Code(s): 2821, 2869, 3083, 3081, 4939 Wastewater Code(s) of actual wastewater, not particular facilities; i.e., non -contact cooling water discharge from a metal plating company would be 14, not 56. Primary 14 Secondary 22 02 36 Main Treatment Unit Code: 0 5 0 0 1 PART III - OTHER PERTINENT INFORMATION 1. Is this facility being constructed with Construction Grant Funds or are any public monies involved (municipals only)? N/A 2. Special monitoring or limitations (including toxicity) requests: None 3. Important SOC, JOC, or Compliance Schedule Dates (please attach): Date Submission of Plans and Specifications Begin Construction Complete Construction 4. Alternative Analysis Evaluation: Has the facility evaluated all of the non -discharge options available? Please provide regional perspective for each option evaluated. Spray Irrigation: Not practical Connection to Regional Sewer System: Not available Subsurface: Not practical Other disposal options: None known PART III - OTHER PERTINENT INFORMATION (continued) 5. Other Special Items: Please find attached photos of the discharges from the various manufacturing facilities on the DuPont complex. All discharges ultimately go into the Woodlined Ditch which collectively discharge into an effluent channel that discharges to the Cape Fear River. As you may recall, the Fayetteville Regional Office was notified by DuPont staff that high levels of turbidity was observed entering the Cape Fear River during September 1999. That notification resulted in an onsite visit by Ricky Revels of the FRO. That visit did reveal that areas of the effluent channel had eroded and some channel walls were vertical. During this period of time, the Lock Master at the US Army Corps of Engineers, Lock Number 3, also contacted the Fayetteville Regional Office to report that an extreme amount of sediment and turbid water were entering the River from this point. This office requests that DuPont provide to the Division a definite plan of action (to be incorporated into this permit or other administrative mechanism) to address this issue. Based on the attached letter forwarded to David Goodrich dated October 20, 2000, the Company asked "the Division of Water Quality to take the needed steps to perform the necessary modeling to determine what, if any, changes would occur to the DuPont -Fayetteville Works NPDES Permit should the final effluent be discharged upstream of Lock and Dam #3." This office has no other information about this sediment problem. It is apparent that the Company acknowledges that their effluent channel has and continues to cause sediment to be deposited into the Cape Fear River and is willing to address this issue. This is a very significant matter as the Company has benefited from this effluent channel for some years and needs to address this issue SOON. Also find attached recent pictures of the Cape Fear River showing the huge amount of sediment in the River channel estimated to be 75% of the channel width at this location. Further, this office has discussed with Mike Johnson an incident that was observed last summer at the effluent channel and River confluence. While fishing, Paul Rawls, of the FRO, observed a very young child sitting in the effluent channel playing. The area of the confluence is a local fishing area that citizens stand to fish "off of the bank". Staff has observed, on numerous occasions, citizens standing in the effluent channel and sediment delta fishing. We understand that this may be a unique request but we feel strongly in requesting that the Company post signs notifying the public of the effluent channel. We feel that DENR should make the public aware that this is not a stream but an effluent channel and is not intended to be used for primary and secondary recreation. You may be aware of the incident that occurred with the permittee during 2001. Very briefly, the facility discovered the presence of hexafluoroacetone hydrate (HFA) in the WWTP effluent. HFA, based on conversations with DuPont staff, was believed to be generated and destroyed in the production process and based on all theory was not to make it to the WWTP or the outfall. Again, based on self reporting and monitoring performed by the permittee, this compound did make it to the effluent and DuPont, in a very timely manner, notified the regional office and began emergency action to modify its treatment system to address this issue. As understood, HFA is an intermediate that is formed in the NAFION process. This matter is brought forth in this report to address and ask for clarification of Part III C. of the NPDES Permit. This portion of the Permit requires the permittee to "notify the Permit Issuing Authority as soon as it knows or has reason to believe" any toxic pollutant which is not limited in the Permit will exceed various thresholds outlined in the Permit. During this emergency event, it became apparent to this office that various processes and interaction of processes at the PART III - OTHER PERTINENT INFORMATION (continued) DuPont facility have the potential to generate toxic compounds not listed in the Permit. Based on inquiries of DWQ Central Office staff and others, these compounds cannot be readily tested for and reference material on these compounds is not easily acquired. It is understood that the permittee has requested of the Central Office clarification on Part III C as to when notification is appropriate. Specifically, we ask, is reporting necessary under this Part III C when it is "Calculated" that there is a reasonable potential for a toxic compound to be present in the waste stream or should the permittee report confirmed measured levels of toxic compounds that may not be listed in the Permit? This question is important because some compounds can only (to our knowledge) be detected with analytical procedures developed by DuPont and even then can only be measured down to the parts per million level. We request that this issue be outlined in the cover letter of the new Permit or in a separate letter forwarded from the Central Office (if not previously forwarded to the permittee) to officially address the question and enable this office to better enforce the NPDES Permit. This matter is of particular importance when considering the complex nature of the wastestream and various uses of the Cape Fear River. PART IV - EVALUATION AND RECOMMENDATIONS It is the recommendation of this office that NC0003573 be reissued in keeping with basinwide strategy, provided all concerns have been satisfactorily addressed. Water Quality Regional Supervisor Date C s � pi7 +af r •,„� r" "�' ,�.. •. - Aga: r c Orr JL lA� 6 •. 'i^. a� t. - � �. ! � is � � � f .. ?k -ma- I i m u k if '. 11 � o , .. 9 .- ..� « » f .. ■©-�2- �� . � �� \\ ■� �� \\� 2>�\/9 t w i ; . k L .. � d s •� � !� � +� � .�• �-��'w� ij'!�L � 1P wap ... A� w rf � � M M 7 .1 wo, All { r la � - s 3 i- M46. i a N 1 a �f • 1 • �.r� r - .: �►• of Tie f 14— Ilk or lot. - r ' �• R rf � � M M 7 .1 { r la � - s — 14— rf � � M M 7 .1 { r la � - #'i i•J� f _ zu IL { al " yam• j�'a; .�i' F ��, f iaT• by�t ��}�_ Iii 'f f X4. :!r { ;14 r' f 1 t at F s� r I �,l" i . j�'a; .�i' F ��, f dk'- y'• �r" •• irk .' ML Iii 'f f X4. :!r { ;14 r' f 1 t F s� r I �,l" i . 6 � a -M r AUGUST 1999 EFFLUENT CHANNEL r AUGUST 17, 1999 4i ` AUGUST 17, 1999 AUGUST 17, 1999 ,�.' .•;'aid:- f, AUGUST 18, 1999 4 AUGUST 18, 1999 ilk 14 , ONA 77 AUGUST 18, 1999 AUGUST 18, 1999 State of North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross, Jr., Secretary Alan W. Klimek, P.E., Director February 27, 2003 Fax Cover Sheet From: Mark McIntire Division of Water Quality NPDES Permitting Unit To: Nomee Landice Fayetteville Observer Fax: (910) 486-3545 3 pages were transmitted including this cover sheet Nomee, A&A • • NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Attached is a copy of the portion of DuPont's NPDES permit application that discusses the startup of their APFO manufacturing facility. Please don't hesitate to contact me if you have questions or need additional information. I can be reached by phone at (919) 733-5083, extension 508, by e-mail at mark.mcintire@ncmail.net, or by fax at (919) 733-0719. Regards, Mark McIntire 1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE 919-733-5083/FAX 919-733-0719 AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/ 10% POST -CONSUMER PAPER VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES ' DuPont - Fayetteville Works NPDES Permit No. NC0003573 Potential Facility Changes APFO Manufacturin : The DuPont — Fayetteville Works has been tentatively identified as INthe location for the DuPontTM APFO manufacturing process. This process will produce ammonium perfluorooctanoate (APFO), CAS No. 3825-26-1, an essential raw material for the DuPontTM Teflon® fluoropolymer resins business. The manufacturing unit will be located either INnear the existing Dymetrol® manufacturing building or near the Naflon® area's Vinyl Ethers South manufacturing building. APFO is recognized by DuPont and others as a biopersistent compound, meaning it remains in the body or environment for extended periods of time after exposure. Due in part to APFO's biopersistence, DuPont, alone and in collaboration with others, has made considerable investment into studying potential health effects of APFO. DuPont's medical surveillance of its own employees and epidemiological data from others in industry support its conclusion that APFO does not pose a health concern to humans or animals at levels present in the workplace or environment. DuPont has used APFO for more than forty years with no observed health effects in workers. APFO is used in low volumes and does not pose any significant acute or chronic risk. It is not a genotoxic compound. It is neither a known developmental toxin nor a known human carcinogen. APFO exhibits low environmental toxicity; tests on various aquatic life forms have shown no adverse effects even at very high doses. APFO is not bioaccumulative in the food chain. As with most fluorochemical processes, the wastewater from the APFO manufacturing process is expected to have very little or no biological oxygen demand (BODS) value. In addition, the fluoride and fluorocarbons have been related to settleability problems in the WWTP's final clarifiers. For these reasons, DuPont proposes to create a new permitted outfall, designated as Outfall 007, with the same monitoring requirements as the currently permitted Outfall 006, through which the APFO process wastewater will be discharged directly to the site's woodlined ditch and ultimately through Outfall 002. The rational behind this new outfall is identical to that used to create Outfall 006 (See Attachment A for a letter dated March 15,1996 from Michael E. Johnson, DuPont, to Gregory Nizich, DEM). DuPont will conduct a study of the APFO process wastewater to verify the absence of significant BODS value before the project is constructed to provide support for the appropriateness to discharge of this stream directly to the woodlined ditch. In the extremely unlikely event that this wastewater exhibits BODS concentrations near the permitted limit of 24 mg/L, then DuPont will convey the wastewater to the site's WWTP for treatment and discharge at Outfall 001. The APFO wastewater will contain iodide, a new chemical to the Fayetteville Works facility. Current estimates of the wastewater indicate that there will be approximately 365 lb/day I2 that would convert to form approximately 477 lb/day of the potassium iodide salt (KI). The 7Q10 of the Cape Fear River at the DuPont location is 791 cubic feet per second. At the 7Q10 flowrate, the concentration of potassium iodide in the river would be 112 µg/L. An emergency oleum water scrubber will be included as an integral part of this process. In the unlikely event of a release of oleum (a solution of S03 in H2SO4) inside the manufacturing building, the scrubber would remove the resulting S03 from the air. To prevent the growth of DuPont - Fayetteville Works Potential Facility Changes NPDES Permit No. NC0003573 algae and/or slime inside the scrubber, a biocide will likely be added to the water in the scrubber. There will be a purge of some volume of the scrubber water on a continuous basis, so the biocide will be discharged to Outfall 002. At this time, no decision .has been made as to what biocide will be used in this scrubber, but when one is chosen, DuPont will submit a revised Part 5 to Section II of this application for Outfall 002 and Outfall 007. Finally, stormwater associated with the APFO process area will be discharged directly to Outfall 002 via the site's Woodlined Ditch. • 7/`/. 1J(tipon'� /Z/7�T•OOri_ C / 4 �G o -c s k •cam. ✓y, fu it I /9715 Pal v� kef 1 76 71 6 oe I 6 o t - so G/ve•, _ 5-0 �- /,sur / 4Z !�, w v, /�ar.� � � � �e,-Q l Sd � ,c. G��•�/ I /,A -es 7 if gpo" /e 10/o cc-ri G'Gtsvr f �/! /S ovL b.,r l !.i sr� %bu s— -G fy—e G Ln . T' r �G�- �c✓t ✓�Gc / C �.e f -t' ,.tit S� , � � � o %� � � /�,. � . IIS' N � �" —� fx� v r-✓ (y �ii c. ��J ��> i i Atv� GGt .t r� � � � /� of �c.n w• �_ �� ,f � d P 5 4./09 �� c� c �, J Ale 1KA,- 4 / J/4" G1G--7 � P T � e � c 4C el/ 7k r ��j R rt+tesh a jlF.K� �r ftj eet,s.+o�rc t �rP f,ir ray �yt4e6vl i4- s lllC. 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(fk 3 j.,;-e�74 X� a. cep- /xp,v, ' eve a esS 0 1wCk w-? 13 M &c-4 �.,54P, - • -:/D(" p o N 7— 1--&, w S — Alm �r�> — 7'��/ - D, 8Zo 10 %-?j c Al/ ca R o D Z4 ,,� IL 64- µ J l C vv-�.-- 7-5s4b �� ►3a ,�.. �� 3oi�� 9�/. 7 "27W,�a/�f le-el17Z ( p. 01 ¢ 417 G -,Q ) Dob S.Gt ✓✓/ �`'1 �q9� ��T �dlr� C"/rte/ 007 �[ C FjC G(F<ceaty{ J EpE rLn /!!2' L_. •-9 y�[ - lot- ul dD 1 006 — -5 , / 57 (\(f E0 DuPontCHigh ay87 D �f 22828 NC Highway 87 W Fayetteville, NC 28306-7332 MAY - 8 2 OI DuPont Fluoroproducts DENR WATER QUALITY POINT COURCE BRANCH May 3, 2001 CERTIFIED MAIL - RETURN RECEIPT REQUESTED Ms. Valery Stephens NCDENR — Division of Water Quality Point Source Branch 1617 Mail Service Center Raleigh, NC 27699-1617 SUBJECT: NPDES Permit Renewal Application NPDES Permit No. NC0003573 Dear Ms. Stephens: This letter officially requests the renewal of NPDES Permit No. NC0003573, which is due to expire on May 31, 2001. Enclosed you will find the original and two copies of the completed application (Form C). The required section titled "Production Data" is being submitted separately from the application due to the sensitive business confidential information that is included. Included in the permit application's section titled "Priority Pollutant Analysis" is a request to waive the annual sampling requirements for the OCPSF priority pollutants and a certification of the absence of these pollutants in the site's discharge, pursuant to 40 CFR 122.44(a)(2)(i). DuPont has demonstrated that these pollutants are not present in the wastewater discharge through five years of annual monitoring. The results of that monitoring are included in this request. Changes that have occurred since the issuance of the last permit are: • The BCH Energy Project Facility has been shutdown, sold, and dismantled. Therefore, all mention of this facility should be removed from the subject permit. • A new DuPontTM Teflon® fluoropolymer resin manufacturing facility was started -up during December 2000. Process wastewater from this facility passes through the site's central Wastewater Treatment Plant and is discharged through Outfalls 001 and 002. • A Biomixer® aeration/mixing unit was added to the Wastewater Treatment Plant's Aeration Tank to add additional dissolved oxygen to the incoming wastewater. DuPont is requesting several changes to the effluent limitations and monitoring requirements of the renewed permit, specifically: P I du Pnnt de Nemaurs and r—n—v n _n ae„ w9nnn Ms. Valery Stephens NCDENR — Division of Water Quality May 3, 2001 • Addition of Outfall 007 to allow for the direct discharge of low -biodegradable process wastewater from the new Fluoroproducts APFO manufacturing process. If testing of the wastewater generated by this process should indicate that it would not be appropriate to direct discharge it, then the wastewater will be treated in the site's Wastewater Treatment Plant. • Addition of the Teflon(& PMDF manufacturing facility and the Fluoronrroducts APFO manufacturing facility to the narrative portion of Outfalls 001 and 002. • Increase of the BODS and TSS limits in response to the anticipated growth of the market for both the Butacite® and Nafion® businesses during the next five years. With this renewal application, DuPont is notifying the Division of Water Quality of its intention to reroute the site's effluent from the current effluent channel to a pipeline that will discharge preferably upstream of Lock and Dam #3, or alternately downstream of the lock and dam. The decision as to location of the discharge will depend on the results of a modeling exercise by DWQ to determine if DuPont's permitted limits would be affected by discharging upstream of the lock and dam. If you have any questions, please feel free to call me at (910) 678-1155. Michael E. Johnson Environmental Manager Enclosures ' DuPont - Fayetteville Works NPDES Permit No. NC0003573 Present Operating Status Process wastewater and stormwater from the various manufacturing areas are collected in the ' respective area sumps and ultimately conveyed via a gravity flow underground process sewer pipe to the site's central wastewater treatment plant (WWTP). Sanitary sewage is conveyed via a separate underground sewer system to the WWTP. The permitted flowrate of the WWTP is 2.0 MGD, with an actual average flowrate of approximately one MGD. This untreated wastewater is commingled in the WWTP Influent Sump where it is pumped to ' an 850,000 -gallon Equalization Basin. The Equalization Basin is mixed with two floating submerged mixers. Three floating surface aerators in the basin cool and aerate the incoming wastewater. A 175,000 -gallon Emergency Retention Tank is available for temporary storage of unsuitable wastewater. This unsuitable wastewater, which typically exhibit a high organic loading or a ' chemical to which the WWTP activated sludge is not acclimated, is eventually treated in the WWTP at a rate that allows for proper biological treatment. ' Wastewater from the Equalization Basin is pumped to a 250,000 -gallon Predigester Tank in which initial biological activity with the WWTP activated sludge begins. The Predigester Tank is aerated with both a floating surface aerator and diffused air. The partially treated wastewater ' from the Predigester Tank is pumped to a 1,700,000 -gallon Aeration Tank. The Aeration Tank is the site of the majority of the biological activity. The Aeration Tank is ' aerated by both a diffused air system located in the bottom of the tank, and by a floating Biomixer® that injects air through submerged rotors. The biologically treated wastewater is then sent to two in -ground clarifiers (119,000 gallons ' and 168,000 gallons respectively) in parallel. The clarified treated effluent is discharged to and through Outfall 001. ' The wasted sludge is sent to a Dissolved Air Floatation (DAF) unit, then to a 47,000 gallon Sludge Storage Tank, and finally to a Rotary Filter for thickening. The thickened sludge is dewatered in a Screw Press, and then dried in a steam -heated dryer. The dried sludge is ' transported off-site to a commercial landfill. Non -contact process cooling water and non -process stormwater are conveyed via surface ' ditches to the site's Woodlined Ditch. In addition, excess riverwater flow and Outfall 001 effluent are discharged directly to the Woodlined Ditch. The combined, total flow of water from the site is discharged and monitored at Outfall 002. The Outfall 002 flow averaged 14.5 MGD during the period from 1996 to 2000. r - DuPont -Fayetteville Works NPDES Permit No. NC0003573 1 ' Potential Facility Changes APFO Manufacturing: The DuPont — Fayetteville Works has been tentatively identified as ' the location for the DuPontTM APFO manufacturing process. This process will produce ammonium perfluorooctanoate (APFO), CAS No. 3825-26-1, an essential raw material for the DuPontTM Teflon® fluoropolymer resins business. The manufacturing unit will be located either near the existing Dymetrol® manufacturing building or near the Nafion® area's Vinyl Ethers South manufacturing building. ' APFO is recognized by DuPont and others as a biopersistent compound, meaning it remains in the body or environment for extended periods of time after exposure. Due in part to APFO's biopersistence, DuPont, alone and in collaboration with others, has made considerable investment into studying potential health effects of APFO. DuPont's medical surveillance of its own employees and epidemiological data from others in industry support its conclusion that APFO does not pose a health concern to humans or animals at levels present in the workplace or environment. DuPont has used APFO for more than forty years with no observed health effects in workers. ' APFO is used in low volumes and does not pose any significant acute or chronic risk. It is not a genotoxic compound. It is neither a known developmental toxin nor a known human carcinogen. APFO exhibits low environmental toxicity; tests on various aquatic life forms have shown no ' adverse effects even at very high doses. APFO is not bioaccumulative in the food chain. As with most fluorochemical processes, the wastewater from the APFO manufacturing process is expected to have very little or no biological oxygen demand (BODS) value. In ' addition, the fluoride and fluorocarbons have been related to settleability problems in the WWTP's final clarifiers. For these reasons, DuPont proposes to create a new permitted outfall, designated as Outfall 007, with the same monitoring requirements as the currently permitted Outfall 006, through which the APFO process wastewater will be discharged directly to the site's woodlined ditch and ultimately through Outfall 002. The rational behind this new outfall is identical to that used to create Outfall 006 (See Attachment A for a letter dated March 15,1996 from Michael E. Johnson, DuPont, to Gregory Nizich, DEM). DuPont will conduct a study of the APFO process wastewater to verify the absence of ' significant BODS value before the project is constructed to provide support for the appropriateness to discharge of this stream directly to the woodlined ditch. In the extremely unlikely event that this wastewater exhibits BODS concentrations near the permitted limit of ' 24 mg/L, then DuPont will convey the wastewater to the site's WWTP for treatment and discharge at Outfall 001. The APFO wastewater will contain iodide, a new chemical to the Fayetteville Works facility. Current estimates of the wastewater indicate that there will be approximately 365 lb/day I2 that would convert to form approximately 477 lb/day of the potassium iodide salt (KI). The 7Q10 of the Cape Fear River at the DuPont location is 791 cubic feet per second. At the 7Q10 flowrate, ' the concentration of potassium iodide in the river would be 112 µg/L. An emergency oleum water scrubber will be included as an integral part of this process. In the unlikely event of a release of oleum (a solution of S03 in H2SO4) inside the manufacturing building, the scrubber would remove the resulting S03 from the air. To prevent the growth of DuPont - Fayetteville Works NPDES Permit No. NC0003573 ' Potential Facility Changes algae and/or slime inside the scrubber, a biocide will likely be added to the water in the scrubber. ' There will be a purge of some volume of the scrubber water on a continuous basis, so the biocide will be discharged to Outfall 002. At this time, no decision has been made as to what biocide ' will be used in this scrubber, but when one is chosen, DuPont will submit a revised Part 5 to Section II of this application for Outfall 002 and Outfall 007. Finally, stormwater associated with the APFO process area will be discharged directly to ' Outfall 002 via the site's Woodlined Ditch. Butacite® Production Increase: Due to the anticipated increases in market demand, the ' Butacite® business is expecting a substantial increase in production of the DuPontTM Butacite® Interlayer sheeting and PVB Resin during the next five years. A new Butacite® PVB reactor is scheduled to be installed within two years, and additional improvements within the Butacite® manufacturing processes will result in the needed production increase. See the section titled "Production Data" for more information. ' Nafion® Production Increase: Due to the anticipated increases in market demand, the DuPont Fluoroproducts monomers business is expecting a substantial increase in production during the next five years. For the same reason, the DuPontTM Nafion® membrane business is expecting a ' substantial increase in production during the next five years. Both the monomers and membrane manufacturing areas will accomplish this expanded production capability through debottlenecking the existing processes and/or installation of new equipment. See the section titled "Production Data" for more information. BCH Alternate Energy Proiect: The BCH Alternate Energy Project located at the DuPont ' Fayetteville Works went into bankruptcy in 1998, and the project's physical facility and equipment were sold. Therefore, all reference to this facility should be removed from the subject ' NPDES permit. Outfall 002 Discharge Relocation: During a drought condition during the summer of 1999, the DuPont effluent channel that conveys the site's final water discharge to the Cape Fear River ' experienced sloughing of the streambanks into the flowing effluent, resulting in excessive sediment discharge into the river. DuPont has initiated a study to determine a cost effective remedy this situation. Currently, two options are being considered: Option 1: Collect the total flow from Outfall 002 and convey it via a pipeline to the Cape Fear River upstream of Lock & Dam #3. Option 2: Collect the total flow from Outfall 002 and convey it via a pipeline to the Cape Fear River downstream of Lock & Dam #3. Option 1 is the most attractive to DuPont at this time because it is the least expensive due to the shorter distance from Outfall 002 and the river. In addition, Option 2 would require that DuPont lay the pipeline across the government owned property of the park facility at Lock & ' Dam #3, otherwise the pipeline would have to run over a much longer, more circuitous route. It 1 DuPontPDES Permit No. NC0003573 uPont -Fayetteville Works ' Potential Facility Changes is unknown whether DuPont would receive approval from the Army Corps of Engineers to lay this pipeline across their property. This proposal was presented to the Division of Water Quality, and the single concern stated ' by the division was that a discharge upstream of Lock & Dam #3 might be considered to be a reservoir instead of a flowing river, and as such DuPont's permitted limits for BODS, nitrogen, and phosphorous might be lowered. According to the division, a modeling exercise would have to be performed by DWQ to determine whether or not lower permit limits would result for a discharge upstream from the Lock & Dam. Given the anticipated growth of this site during the ' next decade, it is essential that DuPont fully understand the implications of relocating the effluent upstream of the Lock & Dam before a decision is made to do so. Therefore, DuPont is awaiting the result of the division's modeling exercise before a decision is made on which option ' will be pursued. 11 1 DuPont - Fayetteville Works NPDES Permit No. NC0003573 Schematic of wastewater flow ' A water balance for the site follows. Also, a schematic of wastewater flow in the Wastewater Treatment Plant follows. 1 C! L W f Q W LL. 1 W (2-- -am )_Q U STORM WATER _-..__... . _.. ..... SOME FLOWS ARE ESTIMATED TO GIVE INTAKE AND DISCHARGE TOTALS. SCHEMATIC WAITER FLOW E.I. DU PONT DE NEMOURS & CO. FAYETTEVILLE WORKS PAGE 1 OF 2 REVISED: 4/01 CD W J CD l CD O 3 TO 0I0 -TREATMENT 1e 11 SCIHEMATIC WAITER FLOW PROCESS USES E.I. DU PONT DE NEMOURS & CO. FAYETTEVILLE WORKS PAGE 2 OF 2 REVISED: 4/01 085 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 PROCESS WASTEWATER I PROCESS STORMWATER SANITARY WASTEWATER EMERGENCY RETENTION TANK WASTEWATER TREATMENT PLANT WASTEWATER FLOW SCHEMATIC E.I. DU PONT DE NEMOURS & CO. FAYETTEVILLE WORKS PAGE 1 OF 1 REVISED: 4/01 MM UNITED STATES DUART QUADRANGLE ST OF R AR NORTH CAROLINA DEPARTMENT OF NATURAL RESOUR DEPARTMENT OF THE INTERIOR 7.5 MINUTE SERIES (TOPOGRAPHIC) AND COMMUNITY DEVELOPMENT N�GEOLOGICAL SURVEY s a P� "' aleoawme N. C. . . 3a• 52' N mi 1 N,v � d a3N18W00 ' ON Wb'a '8 �100� 3yiSnH '0 MI -1-11M Z00 iw-jin0 , L00 �iv-jin0 n 00 ,®N0�331 0 ao 0 oa ' m (3iVN?J3iW d1MM O°® 03SOd02Jd) °°�L00 �wjin0 IPU , < 000 m ®° ®31iodlne ' ®N013dN 00 , ((I3SOd0�Jd) 900 �w31n0 ---------- •00 N3ad�8 -- - -- - - ------ --- _ -- -- - - .00 WVI�139nno - - (3iMJ3iW 03SOd0�Jd) HILTON s11`ddlnO syidOM 1111AILD VA dVN NOUVOM 1 DuPont - Fayetteville Works Production Data NPDES Permit No. NC0003573 The information required in this section is extremely sensitive since the requirement is for the applicant to report the production levels of each process for the past three years. This information would be very valuable to our competitors, and would be potentially detrimental to the DuPont Company if it were disclosed. Therefore this information is being submitted to the Division of Water Quality via separate mailing, and DuPont requests that the division hold this information as Business Confidential Information as described in the North Carolina General Statutes, Article 21, Part 1, §143- 215.3C, and that this information not be placed in the division's Central Files for public access. 11 l .-V w DuPont - Fayetteville Works Sludge Management Plan NPDES Permit No. NC0003573 The DuPont — Fayetteville Works operates a Class 3 Wastewater Treatment Plant that is comprised of a single -stage activated sludge biological system. Excess sludge is removed from the system by diverting part of the Recycled Activated Sludge (at approximately 0.6% solids) from the clarifiers to a Dissolved Air Floatation (DAF) unit for initial thickening. The sludge from the DAF (at approximately 3% solids) is transferred to a Mix Tank where polymer agents are added to enhance the dewatering process. The semi -thickened sludge is transferred from the Mix Tank to a Rotary Filter for final thickening, whereby the sludge is thickened to 6% solids. The thickened sludge is then transferred to a Screw Press where it is dewatered to a concentration of 9-20% solids. Following the Screw Press, the sludge is dried in steam heated dryers to a concentration of 40% - 55% solids. On the average, the weekly quantity of generated dried sludge is 13,000 lb. The dried, non -hazardous sludge is transported off-site to a commercial Subtitle D landfill. This sludge is currently being disposed of at the Waste Industries' Sampson County Landfill near Roseboro, NC. Mercury Emissions to Cape Fear River Subject: Mercury Emissions to Cape Fear River Date: Tue, 3 Jul 2001 12:17:26 -0400 From: "Michael E Johnson" <Michael. E. Johnson@ USA. dupont.com> To: Mike.Templeton@ncmai[.net CC: Kitty.Kramer@ncmait.net Mike, Here is an Email detailing the question I have for you regarding the discharge of mercury in the wastewater stream from the DuPont - Fayetteville Works (NPDES Permit NC0003573) to the Cape Fear River. I am sending you this message since you have been assigned the task of renewing our NPDES Permit. BACKGROUND: This site using potassium hydroxide (KOH) in several applications within the DuPont(TM) Nafiion(R) manufacturing process. Potassium hydroxide apparently contains trace levels of mercury. It was recently discovered that our KOH supplier (OxyChem) has not and cannot meet the contractual terms that the KOH have no detectable levels of mercury. OxyChem has assured DuPont that they can meet a mercury specification of "less than 0.02 mg/L Hg" in their KOH. L0 k4 R— DuPont consumes 35,000 lb/day of KOH, which is neutralized and discharged through Outfall 001 and ultimately through Outfall 002. If the mercury concentration in the KOH is 0.02 mg/L, then the average mass discharge would be 0.0007 lb/day Hg. L Outfall 001 averages about 1.0 MGD and in 2000 had a one day low flow of _ 0,000l W4 0.426 MGD. Outfall 002 averages about 14.5 MGD and in 2000 had a one day (a (.0 1�'' a t low flow of 4.981 MGD. ?a Gi , = O ,00 00� W4 At the average flow rate of 1.0 MGD, the average Outfall 001 concentration °C (� 5 )ISO) = 0 , 00 15 V4 of mercury (0.0007 lb/day Hg) would be 0.084 ug/L Hg. At the tow flow rate of 0.426 MGD, the Outfall 001 concentration of mercury (0.0007 lb/day Hg) would have been 0.197 ug/L Hg. At the average flow rate of 14.5 MGD, the average Outfall 002 concentration of mercury (0.0007 lb/day Hg) would be 0.006 ug/L Hg. At the low flow rate of 4.981 MGD, the Outfall 002 concentration of mercury (0.0007 lb/day Hg) would have been 0.017 ug/L Hg. Per Kitty Kramer, DWQ requires a minimum detection level (MDL) of 0.2 ug/L %�S MSA -for mercury. o1rof MSA- Am 0,0-COLn1tL The one day low flow rate for Outfall 001 with the average mercury discharge would have resulted in a mercury concentration just under the MDL, however if the site were discharging this unusually low flow rate at Outfall 001, then the production areas would not be operating normally, and the mass discharge of mercury would be correspondingly lower. All of the other above flow scenarios result in mercury concentrations well below the State's MDL for mercury. QUESTION: What, if anything, does the DuPont - Fayetteville Works need to do to address the discharge of this wastewater that contains mercury at what 1 of 2 7/3/2001 2:35 PM Mercury Emissions to Cape Fear River should be non-detectable levels? If you wish to contact me by telephone, my number is 910-678-1155. Thanks for your assistance on this issue. Regards, Mike Johnson Environmental Manager DuPont - Fayetteville Works Q�,o.►,�fi �F �h� �� gid_ .►ar'1"; R 1 2 of 2 7/3/2001 2:35 PM