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Home My WebLink AboutNC0004952_Speculative Limits_19901120NPDES DOCIMENT SCANNING COVER SHEET NC0004952 Celanese Shelby Facility NPDES Permit: Document Type: Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: November 20, 1990 This document is printed earl reuse paper - ignore a oy content on the reirerse side State of North Carolina Department of Environment, Health, and Natural Resources Asheville Regional Office James G. Martin, Governor William W. Cobey, Jr., Secretary DIVISION OF ENVIRONMENTAL MANAGEMENT WATER QUALITY SECTION MEMORANDUM TO: THROUGH: FROM: SUBJECT: November 20, 1990 Dale Overcash Permitting and Engineering Forrest R. Westall Regional Water Quality Supervisor 41111 Hoechst elanese Corporation Interim Limits/Construction Schedule NPDES Permit NC0004952 Cleveland County Jim Re:i Environ Chemist Ann B. Orr Regional Manager NOV N-, As a result of OCPSF Guideline's impact on Hoechst Celanese's NPDES Permit No. NC0004952, the Company must have, in order to maintain compliance, interim limits and a schedule. Inclusion of those items in Hoechst's renewal permit is believed to be the best course. Regional staff met with Hoechst personnel on October 10, 1990 to discuss the situation. As a result of that discussion, additional information was requested of the company. A portion of the additional material was forwarded previously; the remainder is attached. Review of Celanese's file suggests that the interim limits requested by the Company are reasonable. The terms of the proposed construction schedule, jointly developed by regional staff and Celanese personnel, are mutually agreeable and sensible. Copies of proposed interim and final limitations pages for the NPDES Permit are attached along with a proposed construction schedule for inclusion in the_permit. Interim Limits - Please include the following in Hoechst Celanese's NPDES Permit. Interim limits would be effective from issuance through May 31, 1994. ...._.._..r_ Interchange Building, 59 Woodfin Place, Asheville, N.C. 28801 • Telephone 704-251.6208 An Equal Opportunity Affirmative Action Employer Dale Overcash Memorandum November 20, 1990 Page Two Parameter Mo Av Da Max Flow 0.800 MGD BOD 275 lb/da 530 lb/da TSS 520 lb/da 975 lb/da Chronic Tox P/F 6.5 pH Include language appearing in NC0004952 issued August 18, 1988. Pertinent section is found at Note #1 * on the second of the "Effluent Limitations and Monitoring Requirements Final" pages for discharge 001. (See attached interim and final pages proposed for NPDES NC0004952) Comments concerning each parameter are offered; Flow - The facility had for the duration of the previous permit been measuring flow as influent; the proposed renewal permit properly requires that Celanese measure flow as effluent The influent flow measurement excluded the impact of storm water on the several acres of polishing ponds which Celanese operates. The judgement is that storm water enters the facility in greater volumes than originally indicated on the NPDES Permit application. Review of Celanese's operating data indicates that during months of maximum production, storm water would necessitate a flow limitation in excess of the 0.550 MGD currently proposed in the renewal permit. Flow must be measured as effluent; otherwise, self -monitoring reports will not accurately describe quantities of wastes discharged to the receiving stream. BOD - The calculation for the proposed interim limitation is 119 mg/1 x 0.5285 MGD x 8.34 = 524 lb/da. The 119 mg/1 and 0.5285 MGD values are maximum self -monitoring values for the period Jan '88 through Sept '90. Applying the ratio of da max / mo av appearing in OCPSF for BOD (2.47) to the 524 lb/da figure yields a mo av of 212 lb/da; allowing for 20% variation due to unforeseen factors, the mo av .interim BOD would be 254 lb/da. Celanese's analysis of their data resulted in a request of 275 lb/da as opposed to the 254 lb/da which would otherwise have been suggested; the difference between their request and my calculation is not sufficient to quibble over. Please note that proposed interim BOD and TSS limitations are lower than those currently in Celanese's NPDES Permit; therefore, WQ considerations should not prevent use of suggested limits. • TSS - The calculation for the proposed interim limitation is 240 mg/1 x 0.5285 MGD x 8.34 = 1058 lb/da. The 240 mg/1 and 0.5285 Dale Overcash Memorandum November 20, 1990 Page Three MGD values are maximum self -monitoring values for the period Jan' 88 through Sept' 90. Applying the ratio of da max / mo av appearing in OCPSF for TSS (2.56) to the 1058 lb/da figure yields a mo av of 413 lb/da; allowing for 20 % variation yields a mo av of .495 lb/da. Celanese's analysis of their data resulted in a request of 520 lb/da v. my calculation of 495 lb/da; again an insignificant difference. Chronic Toxicity - Raising the effluent flow limitation from 0.550 MGD to 0.800 MGD would necessitate tightening the limit from 4.5% to 6.5 %. QH - Algae sometimes during summer months grows in Celanese's polishing ponds in quantities sufficient to raise pH above 9 std units in the final discharge. The language in their current permit prevents the Company's being penalized for algae growth, by allowing discharge pH's outside the 6-9 range so long as the Company can document that the pH of the polishing pond influent is within the 6-9 range. Stream monitoring has shown no water quality violations occurring as a result of algae. To verifthat no adverse water quality impacts were attributable to alg e influenced pH's, the Company would be amenable to U & D monitoring for pH during periods when polishing pond effluent pH's were outside the 6 - 9 range. Organics & Metals - Interim limits, based upon currently available data, need not differ from proposed final limitations. Final limits - Modifying the flow and chronic toxicity limits to fully account for storm water and high monthly average flows, is needed. Suggested changes are for raising the monthly flow limitation to 0.800 MGD with associated strengthening of the toxicity limit to 6.5%. Also requested is inclusion o.f the pH language and associated U & D monitoring requirements discussed above in comments concerning pH. Construction schedule - Additional equipment will be required to allow Celanese to consistently comply with final OCPSF guidelines. The proposed schedule is outlined in an attachment to this memorandurm; it would require compliance with final limitations on inglirmle31, 1994. Thank you for your assistance and consideration with these matters. If there are questions or a need for additional information, please contact me at telephone number 704-251-6208. Enclosure xc: Rosanne Barona Part I Permit No. NC0004952 B. Schedule of Compliance 1. The permittee shall comply with Final Effluent Limitations specified for discharges in accordance with the following schedule: Submit preliminary engineering report defining needs and proposing alternative methods for achieving compliance with final effluent limitations on or before . . . . . . . . . . February 28, 1991. Complete pilot study and submit final report on or before August 31, 1991. Submit plans and specifications for needed equipment additions or modifications and request authorization to construct on or before March 31, 1992. Begin construction (contractor on site and authorization to proceed executed) on or before . . . October 31, 1992. Complete construction (all treatment units in place and i.n operation) on or before December 31, 1993. Achieve compliance with final 1__mitations on or before . May 31, 1994. A( ) . Permit No. NC0004952 EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS INTERIM During the period beginning on the effective date of the permit and lasting until May 31, 1994, the Permittee is authorized to discharge from outfall(s) serial number 001. Such discharge shall be limited and monitored by the permittee as specified below: Effluent Characteristics TypeLocation Flow -BOD, 5 Day, 20°C Composite E —TS S Fecal Coliform (geometric mean) Oil and Grease Total Nitrogen (NO2+NO3+TKN) Total Phosphorus Chronic Toxicity** Pollutant Analysis*** Discharge Limitations Monitoring Requirements Lbs/dav Units (specify) Measurement Sample, Sample Mon. Avg. Daily Max Monthly Avg. Weekly Avg. Frequency 275.0 520.0 530 975.0 0.800 MGD Continuous Daily 200.0/100 ml 400.0/100 ml Weekly * Sample Location: I -Influent, E-Effluent Chronic Toxicity (Ceriodaphnia) P/F at 6.5%; March, June, See Part III, Condition D. See Part III, Condition E. Quarterly Semi -Annually Semi -Annually Quarterly Annually Recorder E Daily Composite E Grab Grab E Composite E Composite E Composite E E September, and December, The pH shall not be less than 6.0 standard units nor greater and shall be monitored daily at the effluent by grab sample. than 9.0 standard units Permit No. NC0004952 A. ( ) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS INTERIM - PAGE TWO The effluent pH of the wastewater is defined and limited at a point between the final clarifiers and final polishing pond, such a point being after the combination of all potential influents to polishing pond, shall not be less than 6.0 Standard Units nor greater than 9.0 Standards Units. If the pH of the effluents from the polishing ponds exceed 9.0, there will be no effluent violation if the wastewater from the final clarifier has met the required pH limits during the thirty (30) days preceding the measurement of the pH above 9.0 of the effluent from the polishing ponds. The pH of the wastewater from the clarifiers and the pH of the effluent from the polishing ponds (final discharge) will be monitored by continuous recorder. Upstream and downstream monitoring shall be conducted on any day the pH of the effluent from the final polishing pond is outside the 6-9 standard unit range. There shall be no discharge of floating solids or visible foam in other than trace amounts. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning on the effective date of the permit and lasting Permittee is authorized to discharge from outfall serial number 001. Such limited and monitored by the permittee as specified below: INTERIM until 05/31 discharges Effluent Characteristics Daily Max. Monthly Avg. Measurement Sample lbs/day lbs/day Frequency Type Acenaphthene 0.003 Acrylonitrile 0.069 Benzene 0.132 Carbon Tetrachloride 0.092 Chlorobenzene 0.068 1,2,4-Trichlorobenzene 0.339 Hexachlorobenzene 0.001 1,2-Dichloroethane 0.447 1,1,1-Trichloroethane 0.131 Hexachloroethane 0.131 1,1-Dichloroethane 0.143 1,1,2-Trichloroethane 0.131 Chloroethane 0.648 Chloroform 0.111 2-Chlorophenol 0.011 1,2-Dichlorobenzene 0.394 1,3-Dichlorobenzene 0.106 1,4-Dichlorobenzene 0.068 1,1-Dichloroethylene 0.060 1,2-trans-Dichloroethylene 0.131 2,4-Dichlorophenol 0.010 1,2-Dichloropropane 0.556 1,3-Dichloropropylene 0.106 2,4-Dimethylphenol 0.087 2,4-Dinitrotoluene 0.129 2,6-Dinitrotoluene 1.550 Ethylbenzene 0.261 Fluoranthene 0.164 Bis(2-Chloroisopropyl)ether 1.831 Methylene Chloride 0.215 Methyl Chloride 0.460 Hexachlorobutadiene 0.119 Naphthalene 0.003 Nitrobenzene 0.164 2-Nitrophenol 0.167 4-Nitrophenol 0.300 2,4-Dinitrophenol 0.297 4,6-Dinitro-o-cresol 0.670 Phenol 0.063 Bis(2-ethylhexyl)phthalate 0.675 Di-n-butyl phthalate 0.138 Diethyl phthalate 0.491 Dimethyl phthalate 0.114 Benzo(a)anthracene 0.003 •Benzo(a)pyrene 0.003 0.003 0.069 0.089 0.044• 0.036 0.164 0.001 0.122 0.051 0.051 0.053 0.051 0.252 0.051 0.011 0.186 0.075 0.036 0.039 0.051 0.010 0.370 0.070 0.044 0.129 0.617 0.077 0.060 0.728 0.097 0.208 0.048 0.003 0.065 0.099 0.174 0.172 0.189 0.036 0.249 0.065 0.196 0.046 0.003 0.003 Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly l Query Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab NC'0004952 /94 uac shall be *Sample Location Effluent Characteristics Daily Max. lbs/day . 3,4-Benzofluoranthene lilenzo(k)fluoranthene •Chrysene Acenaphthylene 4thracene •Fluorene Phenanthrene Pyrene Tetrachloroethylene Toluene Trichloroethylene Vinyl Chloride Total Chromium Total Copper Total Cyanide Total Lead Total Nickel Total Zinc Monthly Avg. lbs/day 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.089 0.039 0.193 0.063 0.131 0.051 0.222 0.222 5.154 2.685 8.175 1.016 0.515 0.515 1.669 0.774 2.779 2.779 6.313 2.540 Total phenolic compounds shall not exceed 0.111 lb/day. *Sample Location: E-Effluent (Continued) Measurement Sample *Sample Frequency Type Location Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E • A( ) . Permit No. NC0004952 EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL During the period beginning on June 1, 1994 and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number 001. Such discharge shall be limited and monitored by the permittee as specified below: Effluent Characteristics Discharge Limitations Monitoring Requirements Lbs/day Units (specify) Measurement Sample Sample Mon. Avg. Daily Max Monthly Avg. Weekly Avg. Frequency Type Location Flow BOD, 5 Day, 20°C 85.8 212.2 TSS 152.8 395.0 Fecal Coliform (geometric mean) Oil and Grease Total Nitrogen (NO2+NO3+TKN) Total Phosphorus Chronic Toxicity** Pollutant Analysis*** 0.800 MGD Continuous Recorder E Daily Composite E Daily Composite E 200.0/100 ml 400.0/100 ml Weekly Grab E * Sample Location: I -Influent, E-Effluent ** *** Chronic Toxicity (Ceriodaphnia) P/F at 6.5%; March, June, See Part III, Condition D. See Part III, Condition E. Quarterly Grab E Semi -Annually Composite E Semi -Annually Composite E Quarterly Composite E Annually E September, and December; The pH shall not be less than 6.0 standard units nor greater than 9.0 standard and shall be monitored daily at the effluent by grab sample. units Permit No. NCO004952 A. ( ). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL - PAGE TWO The effluent pH of the wastewater is defined and limited at a point between the final clarifiers and final polishing pond, such a point being after the combination of all potential influents to polishing pond, shall not be less than 6.0 Standard Units nor greater than 9.0 Standard Units. If the pH of the effluents from the polishing ponds exceed 9.0, there will be no effluent violation if the wastewater from the final clarifier has met the required pH limits during the thirty (30) days preceding the measurement of the pH above 9.0 of the effluent from the polishing ponds. The pH of the wastewater from the clarifiers and the pH of the effluent from the polishing ponds (final discharge) will be monitored by continuous recorder. Upstream and downstream monitoring shall be conducted on any day the pH of the effluent from the final polishing pond is outside the 6-9 standard unit range. There shall be no discharge of floating solids or visible foam in other than trace amounts. EFFLUENT LIMITATIONS AND MO NITORING REQUIREMENTS During the period beginning on May 31, Pemuttee is authorized to discharge from limited and monitored by the pennittee as Effluent Characteristics Acenaphthene Acrylonitrile Benzene Carbon Tetrachloride Chlorobenzene 1,2,4-Trichlorobenzene Hexachlorobenzene 1,2-Dichloroethane 1,1,1-Trichloroethane Hexachloroethane 1,1-Dichlaroethane_ 1,1,2-Trichloroethane Chloroethane Chloroforms: =2-Chlorophenol 1,2-Dichlorobenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,1-Dichloroethylene 1,2-trans-Dichloroethylene .2,4-Dichlorophenol 1,2-Dichloropropane 1,3-Dichloropropylene 2,4-Dimethylphenol '2,4-Dinitrotoluene 2,6-Dinitrotoluene Ethylbenzene Fluoranthene B (2-Chloroisopropyl)ether 1.831 Methylene Chloride Methyl Chloride Hexachlorobutadiene Naphthalene Nitrobenzene 2-Nitrophenol 4-Nitrophenol 2,4-Dinitrophenol 4,6-Dinitro-o-cresol Phenol Bis(2-ethylhexyl)phthalate Di-n-butyl phthalate Diethyl phthalate Dimethyl phthalate Benzo(a)anthracene • Benzo(a)pyrene 1994, and lasting outtaa serial number 001. Such specified below: FINAL NC0004952 until expiration, the discharges shall be Daily Max. Monthly Avg. Measurement Sample *Sample lbs/day lbs/day Frequency Type Location 0.003 0.003 0.069 0.069 0.132 0.089 0.092 0.044 0.068 0.036 0.339 0.164 0.001 0.001 0.447 0.122 0.131 0.051 0.131 0.051 0.143 0.053 0.131 0.051 0.648 0.252 0.111 0.051 0.011 0.011 0.394 0.186 0.106 0.075 0.068 0.036 0.060 0.039 0.131 0.051 0.010 0.010 0.556 0.370 0.106 0.070 0.087 0.044 0.129 0.129 1.550 0.617 0.261 0.077 0.164 0.060 0.728 0.215 0.097 0.460 0.208 0.119 0.048 0.003 0.003 0.164 0.065 0.167 0.099 0.300 0.174 0.297 0.172 0.670 0.189 0.063 0.036 0.675 0.249 0.138 0.065 0.491 0.196 0.114 0.046 0.003 0.003 0.003 0.003 Quarterly Quarterly Quarterlyl Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterlyl Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly l Qum y Quarterly Quarterly Quarterly Quarterly l Qum y Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab • E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Grab E Effluent Characteristics Daily Max. lbs/day .3,4-Benzofluoranthene 'aenzo(k)fluoranthene .Chrysene Acenaphthylene enthracene •Fluorene Phenanthrene Pyrene T etrachloroethylene Toluene Trichloroethylene Vinyl Chloride Total Chromium Total Copper Total Cyanide Total Lead Total Nickel Total Zinc Monthly Avg. lbs/day 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.089 0.039 0.193 0.063 0.131 0.051 0.222 0.222 5.154 2.685 8.175 1.016 0.515 0.515 1.669 0.774 2.779 2.779 6.313 2.540 Total phenolic compounds shall not exceed 0.111 lb/day. *Sample Location: E-Effluent (Continued) Measurement Sample *Sample Frequency Type Location Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E Quarterly Grab E