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HomeMy WebLinkAboutDWQ-2024-006505STATE OF UTAHDIVISION OF WATER QUALITYDEPARTMENT OF ENVIRONMENTAL QUALITYSALT LAKE CITY, UTAHUTAH POLLUTANT DISCHARGE ELIMINATION SYSTEM (UPDES) PERMITSMinorMunicipalPermit No. UT0025771In compliance with provisions of the Utah Water Quality Act, Title 19, Chapter 5, Utah Code (the "Act"),THE CITY OF GREEN RIVERis hereby authorized to discharge from GREEN RIVER WASTEWATER TREATMENT FACILITYto receiving waters named RECEIVING WATER, and to distribute effluent for reuse,in accordance with specific limitations, outfalls, and other conditions set forth herein.This permit shall become effective on Month XX, 20XXThis permit expires at midnight on Month XX, 20XX.Signed this XXth day of Month, 20XX._________________________John K. Mackey, P.E. DirectorTable of ContentsOutline Page NumberI. DISCHARGE LIMITATIONS AND REPORTING REQUIREMENTS5A. Description of Discharge Points5B. Narrative Standard5C. Specific Limitations and Self-Monitoring Requirements5D. Reporting of Monitoring Results16II. PRETREATMENT REQUIREMENTS18A. Definitions20B. Pretreatment Monitoring and Reporting Requirements.21C. Industrial Wastes21D. General and Specific Prohibitions22E. Significant Industrial Users Discharging to the POTW23F. Change of Conditions23G. Legal Action24H. Local Limits24A. Definitions24B. Pretreatment Monitoring and Reporting Requirements.25C. Industrial Wastes26D. General and Specific Prohibitions27E. Significant Industrial Users Discharging to the POTW28F. Change of Conditions28G. Legal Action28H. Local Limits29A. Pretreatment Program Delegation29B. Program Updates30C. Annual Report30D. General and Specific Prohibitions30E. Categorical Standards31F. Self-Monitoring and Reporting Requirements31G. Enforcement Notice32H. Formal Action32III. BIOSOLIDS REQUIREMENTS34A. Biosolids Treatment and Disposal34B. Specific Limitations and Monitoring Requirements34C. Management Practices of Biosolids38D. Special Conditions on Biosolids Storage40E. Representative Sampling40F. Reporting of Monitoring Results40G. Additional Record Keeping Requirements Specific to Biosolids41IV. STORM WATER REQUIREMENTS43V. MONITORING, RECORDING & GENERAL REPORTING REQUIREMENTS44A. Representative Sampling44B. Monitoring Procedures44C. Penalties for Tampering44D. Compliance Schedules44E. Additional Monitoring by the Permittee44F. Records Contents44G. Retention of Records44H. Twenty-four Hour Notice of Noncompliance Reporting44I. Other Noncompliance Reporting45J. Inspection and Entry45VI. COMPLIANCE RESPONSIBILITIES47A. Duty to Comply47B. Penalties for Violations of Permit Conditions47C. Need to Halt or Reduce Activity not a Defense47D. Duty to Mitigate47E. Proper Operation and Maintenance47F. Removed Substances47G. Bypass of Treatment Facilities47H. Upset Conditions49I. Toxic Pollutants49J. Changes in Discharge of Toxic Substances49VII. GENERAL REQUIREMENTS51A. Planned Changes51B. Anticipated Noncompliance51C. Permit Actions51D. Duty to Reapply51E. Duty to Provide Information51F. Other Information51G. Signatory Requirements51H. Penalties for Falsification of Reports52I. Availability of Reports52J. Oil and Hazardous Substance Liability52K. Property Rights53L. Severability53M. Transfers53N. State or Federal Laws53O. Water Quality - Reopener Provision53P. Biosolids – Reopener Provision53Q. Toxicity Limitation - Reopener Provision54VIII. DEFINITIONS55A. Wastewater55B. Biosolids56 DISCHARGE LIMITATIONS AND REPORTING REQUIREMENTS Description of Discharge Points. The authorization to discharge wastewater provided under this part is limited to those outfalls specifically designated below as discharge locations. Discharges at any location not authorized under a UPDES permit are violations of the Act and may be subject to penalties under the Act. Knowingly discharging from an unauthorized location or failing to report an unauthorized discharge may be subject to criminal penalties as provided under the Act.Outfall NumberLocation of Discharge Outfall001Located at latitude3858' 50" and longitude 1109'8". The discharge flows directly into the Green River.Outfall Number(s)Location of Effluent Reuse Discharge Outfall(s) and 001RDescription of Area for UseLocated at latitude ' " and longitude ' ". (Add other description that will allow anyone, even if unfamiliar with the site, to find the reuse outfall and land application site). Narrative Standard. It shall be unlawful, and a violation of this permit, for the Permittee to discharge or place any waste or other substance in such a way as will be or may become offensive such as unnatural deposits, floating debris, oil, scum, or other nuisances such as color, odor or taste, or cause conditions which produce undesirable aquatic life or which produce objectionable tastes in edible aquatic organisms; or result in concentrations or combinations of substances which produce undesirable physiological responses in desirable resident fish, or other desirable aquatic life, or undesirable human health effects, as determined by a bioassay or other tests performed in accordance with standard procedures. Specific Limitations and Self-Monitoring Requirements. Effective immediately, and lasting through the life of this permit, there shall be no acute or chronic toxicity in Outfall 001 as defined in Part VIIIof this permit. Effective immediately and lasting the duration of this permit, 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 *a Maximum Monthly Avg Maximum Weekly Avg Yearly Average Daily Minimum Daily Maximum Total Flow (X.X) (X.X) -- -- (X.X) BOD5, mg/L BOD5 Min. % Removal (X.X) 85 (X.X) -- -- -- -- -- -- -- TSS, mg/L TSS Min. % Removal 25 85 35 -- -- -- -- -- -- -- Dissolved Oxygen, mg/L -- -- -- (X.X) -- Total Ammonia (as N), mg/L Summer (Jul-Sep) Fall (Oct-Dec) Winter (Jan-Mar) Spring (Apr-Jun) (X.X) (X.X) (X.X) (X.X) (X.X) (X.X) (X.X) (X.X) -- -- -- -- -- -- -- -- (X.X) (X.X) (X.X) (X.X) TRC, mg/L (X.X) (X.X) -- -- (X.X) E. coli, No./100mL 126 157 -- -- -- Total Phosphorus (as P), mg/L (Final) *k, *l, *i (X.X) (X.X) (1/X.X) -- (X.X) Oil & Grease, mg/L -- -- -- -- 10.0 pH, Standard Units -- -- -- 6.5 9 TDS, mg/L *j Self-Monitoring and Reporting Requirements *a Parameter Frequency Sample Type Units Total Flow *b, *c Continuous/What? Recorder MGD BOD5, Influent *d Effluent How Often? How Often? Composite Composite mg/L mg/L TSS, Influent *d Effluent How Often? How Often? Composite Composite mg/L mg/L E. coli How Often? Grab No./100mL pH How Often? Grab SU Total Ammonia (as N) How Often? Composite mg/L DO How Often? Grab mg/L TRC, mg/L, *e, *g How Often? Grab mg/L Oil & Grease *f When Sheen Observed Grab mg/L Orthophosphate (as P),*k Effluent Monthly/ How Often? Composite mg/L Total Phosphorus (as P),*l, *k Influent Effluent Monthly/ How Often? Monthly/ How Often? Composite Composite mg/L mg/L Total Kjeldahl Nitrogen, TKN (as N) *k, *l Influent Effluent Monthly/ How Often? Monthly/ How Often? Composite Composite mg/L mg/L Nitrate, NO3 *k, *l Monthly/ How Often? Composite mg/L Nitrite, NO2 *k, *l Monthly/ How Often? Composite mg/L TDS, mg/L *j Monthly/ How Often? Composite mg/L Temperature, mg/L *l, Monthly/ How Often? Composite mg/L Metals, *i Influent Effluent Quarterly/ How Often? Quarterly/ How Often? Composite Composite mg/L mg/L Organic Toxic Pollutants, Influent Effluent Yearly/ How Often? Yearly/ How Often? Grab/Composite Grab/Composite mg/L mg/L*aSee Definitions, Part VIII, for definition of terms.*bFlow measurements of influent/effluent volume shall be made in such a manner that the Permittee can affirmatively demonstrate that representative values are being obtained.*cIf the rate of discharge is controlled, the rate and duration of discharge shall be reported.*dIn addition to monitoring the final discharge, influent samples shall be taken and analyzed for this constituent at the same frequency as required for this constituent in the discharge.*eAnalytical results less than 0.06 mg/l will not be considered out of compliance with the permit. For purposes of calculating averages and reporting on the Discharge Monitoring Report form, the following will apply: 1) analytical values less than 0.02 mg/L shall be considered zero; and 2) analytical values less than 0.06 mg/L and equal to or greater than 0.02 mg/L will be recorded as measured.*fOil & Grease sampled when sheen is present or visible. If no sheen is present or visible, report NA. *gTotal residual chlorine monitoring frequency is (How Often?) times a week. The chlorine disinfection is a backup system to the ultra violet system and therefore should not be needed unless the ultra violet system has a failure and is by passed. The TRC limits are low enough to require analysis in the onsite lab which is open only 6 days a week. Frequency reduction will remove a requirement that the lab be opened for a 7th day. In case of a bypass on any day the lab is closed, (Permittee) will bring in lab personnel to open the lab for TRC analysis *hTheacute Ceriodaphnia will be tested during the 1st and 3rd quarters and the acute fathead minnows will be tested during the 2nd and 4th quarters. The chronic Ceriodaphniawill be tested during the 2nd and 4th quarters and the chronic fathead minnows will be tested during the 1st and 3rd quarters. *iMetals results were reviewed for the last 36 months. Only selenium appeared to be close to the limits suggested in the Wasteload. After further review, and confirmation by a round of sampling in late November, early December of 2004, it was shown that the reporting limit for selenium for the onsite lab is above the suggested limits, and when samples are analyzed off site in a lab with lower reporting limits, selenium levels are under the reporting limit for the lab. No limits are required at this time.NOTE: If discharge is in the Colorado River Basin, put the appropriate total dissolved solids (TDS) language in the SOB, and the permit (see below). *jThe effluent shall not exceed the culinary source water intake by more than 400 mg/L of TDS (*******or the permittee could request 1 ton/day salt loading, or 366 tons/year*******).*kThese reflect changes required with the adoption of UAC R317-1-3.3, Technology-based Phosphorus Effluent Limits rule.Total Phosphorus Compliance Schedule:DateMilestoneDecember 31, 2019Complete monitoring only sampling for Total PhosphorusJanuary 1, 2020Comply with Final Total Phosphorus Effluent Limit *l(Pollutant or Pollutants) are being sampled in support of the work being done for the TMDL currently underway for the (Water Body). The Pollutants Of Concern (POC) will be monitored and reported (on a monthly basis by the facility on Discharge Monitoring Report, but will not have a limit associated with them/or at the end of each Calendar year of sampling for these POC’s), (Permittee) will report the results of all sampling done for the POC. If (Permittee) decides to sample more frequently for these POC’s, the additional data will be welcome. Effective immediately and lasting the duration of this permit, the permittee is authorized to discharge from Outfall 001R. Such discharges shall be limited and monitored by the permittee as specified below: ParameterOutfall 001R Effluent Limitations *a, *p, *q Max Monthly Average Max Weekly Median Max Daily Average Minimum Maximum Turbidity, NTU*p -- -- 2 -- 5 TRC, mg/L *m, *q -- -- -- 1 -- BOD5, mg/L 10 -- -- -- -- E coli, No/100mL*o -- ND*q -- -- 9 pH, Standard Units -- -- -- 6.0 9.0 Reuse Outfall 001R Self-Monitoring and Reporting Requirements *a *n Parameter Frequency Sample Type Units Total Flow, *b, *c Continuous Recorder MGD Turbidity Continuous Recorder mg/L TRC *m, *q Daily Recorder mg/L BOD5 Weekly Composite mg/L E. coli Daily Grab No./100mL pH Daily Grab SU **Cell Depth** Monthly Measure Feet **Free Board ** Monthly Measure Feet **Remove if lagoon discharges routinely** Parameter Type II Reuse Outfall 001R Effluent Limitations *a Max Monthly Average Max Weekly Median Max Daily Average Minimum Maximum BOD5 25 -- -- -- -- TSS 25 35 -- - -- E. coli, No/100mL *o -- 126 -- -- 500 pH, Standard Units -- -- -- 6.0 9.0 -- – Not Applicable Type II Reuse Outfall 001R Self-Monitoring and Reporting Requirements *a *n Parameter Frequency Sample Type Units Total Flow, *b, *c Continuous Recorder MGD BOD5 Weekly Composite mg/L TSS Daily Composite mg/L E. coli Daily Grab No./100mL pH Daily/ Continuous Grab/Recorder SU **Cell Depth** Monthly Measure Feet **Free Board ** Monthly Measure Feet **Remove if lagoon discharges routinely** *aSee Definitions, Part VIII, for definition of terms. *bFlow measurements of influent/effluent volume shall be made in such a manner that the permittee can affirmatively demonstrate that representative values are being obtained. *cIf the rate of discharge is controlled, the rate and duration of discharge shall be reported. *mThe facility is required to disinfect to destroy, inactivate or remove pathogenic microorganisms by chemical, physical or biological means. Disinfection may be accomplished by chlorination, ozonation, or other chemical disinfectants, UV radiation. Or other approved processes. Chlorine residual is recommended but no longer required. Sampling not required if chlorination is not being used. The total residual chlorine shall be measured continuously and shall at no time be less than 1.0 mg/l after 30 minutes contact time at peak flow. If an alternative disinfection process is used, it must be demonstrated to the satisfaction of the Director that the alternative process is comparable to that achieved by chlorination with a 1 mg/l residual after 30 minutes contact time. If the effectiveness cannot be related to chlorination, then the effectiveness of the alternative disinfection process must be demonstrated by testing for pathogen destruction as determined by the Director. A 1 mg/l total chlorine residual is recommended after disinfection and before the treated effluent goes into the distribution system.*nReuse monitoring results obtained during the previous month for reuse discharges shall be summarized for each month and reported on NetDMR. *o(For Type I only.) The weekly median E. coli concentration shall be non-detect*p(For Type I resue only.) An alternative disposal option or diversion to storage must be automatically activated if turbidity exceeds the maximum instantaneous limit for more than 5 minutes, or chlorine residual drops below the instantaneous required value for more than 5 minutes, where chlorine disinfection is used.*q(For Type I reuse only.) The total residual chlorine shall be measured continuously and shall at no time be less than 1.0 mg/l after 30 minutes contact time at peak flow. If an alternative disinfection process is used, it must be demonstrated to the satisfaction of the Director that the alternative process is comparable to that achieved by chlorination with a 1 mg/l residual after 30 minutes contact time. If the effectiveness cannot be related to chlorination, then the effectiveness of the alternative disinfection process must be demonstrated by testing for pathogen destruction as determined by the Director. A 1 mg/l total chlorine residual is recommended after disinfection and before the treated effluent goes into the distribution system. Management Practices for Land Application of Treated Effluent: The application of treated effluent to frozen, ice-covered, or snow covered land is prohibited. No person shall apply treated effluent where the slope of the site exceeds 6 percent. The use should not result in a surface water runoff. The use must not result in the creation of an unhealthy or nuisance condition, as determined by the local health department. Any irrigation with treated effluent must be at least 300 feet from a potable well. For Type I reuse, any irrigation must be at least 50 feet from any potable water well. For Type II reuse, any irrigation must be at least 300 feet from any potable water well. For Type II reuse, spray irrigation must be at least 100 feet from areas intended for public access. This distance may be reduced or increased by the Director. Impoundments of treated effluent, if not sealed, must be at least 500 feet from any potable well. Public access to effluent storage and irrigation or disposal sites shall be restricted by a stock-tight fence or other comparable means which shall be posted and controlled to exclude the public (Compliance Schedule for a Particular Parameter if necessary) Compliance Schedule There is no Compliance Schedule included in this renewal permit. Acute/Chronic Whole Effluent Toxicity (WET) Testing.As part of the nationwide effort to control toxics, biomonitoring requirements are being included in all major permits and in minor permits for facilities where effluent toxicity is an existing or potential concern. Authorization for requiring effluent biomonitoring is provided for in UAC R317-8-4.2 and R317-8-5.3. The Whole Effluent Toxicity (WET) Control Guidance Document, February 15, 1991, outlines guidance to be used by Utah Division of Water Quality staff and by permittee’s for implementation of WET control through the UPDES discharge permit program.Green River City is a minor point source along the Green River and discharges infrequently. Green River City’s discharge is not likely to be toxic. As a result, biomonitoring of the effluent will not be required. However, the permit will contain a WET reopener provision. Reporting of Monitoring Results. Reporting of Wastewater Monitoring ResultsMonitoring results obtained during the previous month shall be summarized for each month and reported on a Discharge Monitoring Report Form (EPA No. 3320-1)or byNetDMR, post-marked or entered into NetDMR no later than the 28th day of the month following the completed reporting period. The first report is due on Month 28, 20--. If no discharge occurs during the reporting period, “no discharge” shall be reported. Legible copies of these, and all other reports including whole effluent toxicity (WET) test reports required herein, shall be signed and certified in accordance with the requirements of Signatory Requirements (see Part VII.G), and submitted by NetDMR, or to the Division of Water Quality at the following address:Department of Environmental QualityDivision of Water QualityPO Box 144870Salt Lake City, Utah 84114-4870 Reporting of Reuse Monitoring Results. Monitoring results obtained during the previous month shall be summarized for each month and reported on NetDMR*, no later than the 28th day of the month following the completed reporting period. The first report is due on Month 28, 20--. If no reuse occurs during the reporting period, “no reuse” shall be reported for those applicable effluent parameters. Legible copies of these, and all other reports required herein, shall be signed and certified in accordance with the requirements of Signatory Requirements (see Part VII.G), and submitted to the Division of Water Quality at the following address:Department of Environmental QualityDivision of Water QualityPO Box 144870Salt Lake City, Utah 84114-4870PRETREATMENT REQUIREMENTSDefinitions. For this section the following definitions shall apply:Indirect Discharge means the introduction of pollutants into a publicly-owned treatment works (POTW) from any non-domestic source regulated under section 307 (b), (c) or (d) of the CWA. Interference means a discharge which, alone or in conjunction with a discharge or discharges from other sources, both:Inhibits or disrupts the POTW, its treatment processes or operations, or its sludge processes, use or disposal; andTherefore is a cause of a violation of any requirement of the POTW's NPDES permit (including an increase in the magnitude or duration of a violation) or of the prevention of sewage sludge use or disposal in compliance with the following statutory provisions and regulations or permits issued thereunder (or more stringent State or local regulations): Section 405 of the Clean Water Act, the Solid Waste Disposal Act (SWDA) (including title II, more commonly referred to as the Resource Conservation and Recovery Act (RCRA), and including State regulations contained in any State sludge management plan prepared pursuant to subtitle D of the SWDA), the Clean Air Act, the Toxic Substances Control Act, and the Marine Protection, Research and Sanctuaries Act.Local Limit is defined as a limit designed to prevent Pass Through or Interference. And is developed in accordance with 40 CFR 403.5(c).Pass Through means a Discharge which exits the POTW into waters of the State or waters of the United States in quantities or concentrations which, alone or in conjunction with a discharge or discharges from other sources, is a cause of a violation of any requirement of the POTW's NPDES permit (including an increase in the magnitude or duration of a violation).Publicly Owned Treatment Works or POTW means a treatment works as defined by section 212 of the CWA, which is owned by a State or municipality (as defined by section 502(4) of the CWA). This definition includes any devices and systems used in the storage, treatment, recycling and reclamation of municipal sewage or industrial wastes of a liquid nature. It also includes sewers, pipes and other conveyances only if they convey wastewater to a POTW Treatment Plant. The term also means the municipality as defined in section 502(4) of the CWA, which has jurisdiction over the Indirect Discharges to and the discharges from such a treatment works.Significant Industrial User (SIU)means:Except as provided in paragraphs (6)(b) and (6)(c) of this definition, the term Significant Industrial User means: All Industrial Users subject to Categorical Pretreatment Standards under 40 CFR 403.6 and 40 CFR chapter I, subchapter N; and Any other Industrial User that: discharges an average of 25,000 gallons per day or more of process wastewater to the POTW (excluding sanitary, noncontact cooling and boiler blowdown wastewater); contributes a process wastestream which makes up 5 percent or more of the average dry weather hydraulic or organic capacity of the POTW Treatment plant; or is designated as such by the Control Authority on the basis that the Industrial User has a reasonable potential for adversely affecting the POTW's operation or for violating any Pretreatment Standard or requirement (in accordance with 40 CFR 403.8(f)(6)). The Control Authority may determine that an Industrial User subject to categorical Pretreatment Standards under § 403.6 and 40 CFR chapter I, subchapter N is a Non-Significant Categorical Industrial User rather than a Significant Industrial User on a finding that the Industrial User never discharges more than 100 gallons per day (gpd) of total categorical wastewater (excluding sanitary, non-contact cooling and boiler blowdown wastewater, unless specifically included in the Pretreatment Standard) and the following conditions are met: The Industrial User, prior to the Control Authority's finding, has consistently complied with all applicable categorical Pretreatment Standards and Requirements; The Industrial User annually submits the certification statement required in § 403.12(q) together with any additional information necessary to support the certification statement; and The Industrial User never discharges any untreated concentrated wastewater. Upon a finding that an Industrial User meeting the criteria in paragraph (6)(a)(2) of this definition has no reasonable potential for adversely affecting the POTW's operation or for violating any Pretreatment Standards or requirement, the Control Authority may at any time, on its own initiative or in response to a petition received from an Industrial User or POTW, and in accordance with 40 CFR 403.8(f)(6), determine that such Industrial User is not a Significant Industrial User.User or Industrial User (IU) means a source of Indirect Discharge. Pretreatment Monitoring and Reporting Requirements.The design capacity of the municipal wastewater treatment facility is less than 5 MGD; therefore the Permittee will not be required to develop an Approved POTWPretreatment Program. However, in order to determine if development of an Approved POTWPretreatment Program is warranted, the Permittee shall conduct an industrial waste survey, as described in Part II.C.1.Monitoring will not be required of the Permittee for the pretreatment requirements at this time. If changes occur monitoring may be required for parameters not currently listed in the permit or current monitoring requirements may be required to be increased to determine the impact of an Industrial User or to investigate sources of pollutant loading. This could include but is not limited to sampling of the influent and effluent of the wastewater treatment plant and within the collection system.For Local Limit parameters it is recommended that the most sensitive method be used for analysis. This will determine if the parameter is present and provide removal efficiencies based on actual data rather than literature values. If a parameter load is greater than the allowable head works load, for any pollutant listed in Part I., or a pollutant of concern listed in the Local Limit development document or determined by the Director, the Permittee must report this information to the Pretreatment Coordinator for the Division of Water Quality. If the loading exceeds the allowable headworks load, increase sampling must occur based on the requirements given by the Pretreatment Coordinator for the Division of Water Quality. If needed sampling may need to occur to find the source(s) of the increase. This may include sampling of the collection system. Notification regarding the exceedances of the allowable headworks loading can be provided via email. Industrial Wastes.The "Industrial Waste Survey" or “IWS” as required by Part II.B.1. consists of; Identifying each Industrial User (IU) and determining if the IU is an SIU, Determination of the qualitative and quantitative characteristics of each discharge, and Appropriate production data. The IWS must be maintained and updated with IU information as necessary, to ensure that all IUs are properly permitted or controlled at all times. Updates must be submitted to the Director sixty (60) days following a change to the IWS.Notify all IUs of their obligation to comply with applicable requirements under Subtitles C and D of RCRA.The Permittee must notify the Director of any new introductions by new or existing IUs or any substantial change in pollutants from any major industrial source. Such notice must contain the information described in 1. above, and be forwarded no later than sixty (60) days following the introduction or change. General and Specific Prohibitions. The Permittee must ensure that no IU violates any of the general or specific standards. If an IU is found violating a general or specific standard the Permittee must notify the Director within 24 hours of the event. The general prohibitions and the specific prohibitions apply to each User introducing pollutants into a POTW whether or not the User is subject to other Pretreatment Standards or any national, State or local Pretreatment Requirements. General prohibition Standards. A User may not introduce into a POTW any pollutant(s) which cause Pass Through or Interference. Specific Prohibited Standards. Developed pursuant to Section 307 of the Clean Water Act of 1987require that under no circumstances shall the Permittee allow introduction of the following pollutants into the waste treatment system from any User (40 CFR 403.5): Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to, waste-streams with a closed cup flashpoint of less than 140˚F (60˚C); Pollutants, which will cause corrosive structural damage to the POTW, but in no case, discharges with a pH lower than 5.0; Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in Interference; Any pollutant, including oxygen demanding pollutants (BOD, etc.) released in a discharge at such volume or strength as to cause Interference in the POTW; Heat in amounts, which will inhibit biological activity in the POTW, resulting in Interference, but in no case, heat in such quantities that the influent to the sewage treatment works exceeds 104˚F (40˚C); Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that will cause Interference or Pass Through; Pollutants which result in the presence of toxic gases, vapor, or fumes within the POTW in a quantity that may cause worker health or safety problems; or, Any trucked or hauled pollutants, except at discharge points designated by the POTW. Any pollutant that causes Pass Through or Interference at the POTW. Any prohibited standard which the Permittee has adopted in an ordinance or rule to control IU discharge to the POTW. In addition to the general and specific limitations expressed above, more specific pretreatment limitations have been and will be promulgated for specific industrial categories under Section 307 of the Clean Water Act of 1987 as amended (See 40 CFR, Subchapter N, Parts 400 through 500, for specific information). Industrial Users Discharging to the POTW. The Permittee shall provide adequate notice to the Director and the Division of Water Quality Pretreatment Coordinator of; Any new introduction of pollutants into the treatment works from an indirect discharger (i.e., Industrial User) which would be subject to Sections 301 or 306of theClean Water Actif it were directly discharging those pollutants; Any substantial change in the volume or character of pollutants being introduced into the treatment works by a source introducing pollutants into the treatment works at the time of issuance of the permit; and For the purposes of this section, adequate notice shall include information on: The quality and quantity of effluent to be introduced into such treatment works; and, Any anticipated impact of the change on the quantity or quality of effluent to be discharged from such publicly owned treatment works. Any IU that must comply with applicable requirements under Subtitles C and D of RCRA. Change of Conditions.At such time as a specific pretreatment limitation becomes applicable to an Industrial User of the Permittee, the Director may, as appropriate, do the following: Amend the Permittee's UPDES discharge permit to specify the additional pollutant(s) and corresponding effluent limitation(s) consistent with the applicable national pretreatment limitation; Require the Permittee to specify, by ordinance, contract, or other enforceable means, the type of pollutant(s) and the maximum amount which may be discharged to the Permittee's facility for treatment. Such requirement shall be imposed in a manner consistent with the POTW program development requirements of the General Pretreatment Regulations at 40 CFR 403; Require the Permittee to monitor its discharge for any pollutant, which may likely be discharged from the Permittee's facility, should the Industrial User fail to properly pretreat its waste; and/or Require the Permittee to develop an Approved POTW Pretreatment Program. Legal Action. The Director retains, at all times, the right to take legal action against the Industrial User and/or the treatment works, in those cases where a permit violation has occurred because of the failure of an Industrial User to discharge at an acceptable level. If the Permittee has failed to properly delineate maximum acceptable industrial contributor levels, the Director will look primarily to the Permittee as the responsible party. Local Limits.If Local Limits are developed per R317-8-8.5(4)(b) to protect the POTW from Pass Through or Interference, then the POTW must submit limits to DWQ for review and public notice, as required by R317-8-8.5(4)(c). Local Limitsshould be developed in accordance with the latest revision of the EPA Local Limits Development Guidance and per R317-8-8.5. BIOSOLIDS REQUIREMENTSThe State of Utah has adopted the 40 CFR Part 503 federal regulations for the disposal of sewage sludge (biosolids) by reference. However, since this facility is a lagoon, there is not any regular sludge production. Therefore 40 CFR Part 503 does not apply at this time. In the future, if the sludge needs to be removed from the lagoons and is disposed in some way, the Division of Water Quality must be contacted prior to the removal of the sludge to ensure that all applicable state and federal regulations are met. STORM WATER REQUIREMENTS. Industrial Storm Water Permit. Based on the type of industrial activities occurring at the facility, the permittee is required to maintain separate coverage or an appropriate exclusion under the Multi-Sector General Permit (MSGP) for Storm Water Discharges Associated with Industrial Activities (UTR000000). If the facility is not already covered, the permittee has 30 days from when this permit is issued to submit the appropriate Notice of Intent (NOI) for the MSGP or exclusion documentation. Construction Storm Water Permit. Any construction at the facility that disturbs an acre or more of land, including less than an acre if it is part of a common plan of development or sale, is required to obtain coverage under the UPDES Construction General Storm Water Permit (UTRC00000). Permit coverage must be obtained prior to land disturbance. If the site qualifies, a Low Erosivity Waiver (LEW) Certification may be submitted instead of permit coverage. MONITORING, RECORDING & GENERAL REPORTING REQUIREMENTS Representative Sampling. Samples taken in compliance with the monitoring requirements established under Part I shall be collected from the effluent stream prior to discharge into the receiving waters. Samples and measurements shall be representative of the volume and nature of the monitored discharge. Samples of biosolids shall be collected at a location representative of the quality of biosolids immediately prior to the use-disposal practice. Monitoring Procedures.Monitoring must be conducted according to test procedures approved under Utah Administrative Code ("UAC'') R317-2-10, UAC R317-8-4.1(10)(d), and/or 40 CFR 503 utilizing sufficiently sensitive test methods unless other test procedures have been specified in this permit. Monitoring must be conducted according to the test procedures listed above unless another method is required under 40 CFR subchapters N or O. Sufficiently sensitive test method means: (1) The method minimum level (ML) is at or below the level of the effluent limit established in the permit for the measured pollutant or pollutant parameter; or (2) The method has the lowest ML of the analytical methods approved under 40 CFR part 136 or required under 40 CFR chapter I, subchapter N or O for the measured pollutant or pollutant parameter as per40 CFR 122.44(i)(1)(iv)(A). Penalties for Tampering. The Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate, any monitoring device or method required to be maintained under this permit shall, upon conviction, be punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than six months per violation, or by both. Compliance Schedules. Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any Compliance Schedule of this permit shall be submitted no later than 14 days following each schedule date. Additional Monitoring by the Permittee. If the permittee monitors any parameter more frequently than required by this permit, using test procedures approved under Permit Part V.B., the results of this monitoring shall be included in the calculation and reporting of the data submitted in the DMR or the Biosolids Report Form. Records Contents. Records of monitoring information shall include: The date, exact place, and time of sampling or measurements: The individual(s) who performed the sampling or measurements; The date(s) and time(s) analyses were performed; The individual(s) who performed the analyses; The analytical techniques or methods used; and, The results of such analyses. Retention of Records. The permittee shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this permit, and records of all data used to complete the application for this permit, for a period of at least five years from the date of the sample, measurement, report or application. This period may be extended by request of the Director at any time. A copy of this UPDES permit must be maintained on site during the duration of activity at the permitted location Twenty-four Hour Notice of Noncompliance Reporting. The permittee shall (orally) report any noncompliance including transportation accidents, spills, and uncontrolled runoff from biosolids transfer or land application sites which may seriously endanger health or environment, as soon as possible, but no later than twenty-four (24) hours from the time the permittee first became aware of circumstances. The report shall be made to the Division of Water Quality (DWQ) via the 24-hour answering service (801) 536-4123. The following occurrences of noncompliance shall initially be reported by telephone to the DWQ via the 24-hour answering service as soon as possible but no later than 24 hours from the time the permittee becomes aware of the circumstances: Any noncompliance which may endanger health or the environment; Any unanticipated bypass, which exceeds any effluent limitation in the permit (See Part VI.G, Bypass of Treatment Facilities.); Any upset which exceeds any effluent limitation in the permit (See Part VI.H, Upset Conditions.); Violation of a daily discharge limitation for any of the pollutants listed in the permit. For other permit violations which will not endanger health or the environment, DWQ may otherwise be notified during business hours (801) 536-4300; or, Violation of any of the Table 3 metals limits, the pathogen limits, the vector attraction reduction limits or the management practices for biosolids that have been sold or given away. A written submission shall also be provided within five days of the time that the permittee becomes aware of the circumstances. The written submission shall contain: A description of the noncompliance and its cause; The period of noncompliance, including exact dates and times; The estimated time noncompliance is expected to continue if it has not been corrected; Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance; and, Steps taken, if any, to mitigate the adverse impacts on the environment and human health during the noncompliance period. The Director may waive the written report on a case-by-case basis if the oral report has been received within 24 hours by the Division of Water Quality, (801) 536-4300. Reports shall be submitted to the addresses in Part I.D, Reporting of Monitoring Results. Other Noncompliance Reporting. Instances of noncompliance not required to be reported within 24 hours shall be reported at the time that monitoring reports for Part I.D are submitted. The reports shall contain the information listed in Part V.H.3 Inspection and Entry The permittee shall allow the Director, or an authorized representative, upon the presentation of credentials and other documents as may be required by law, to: Enter upon the permittee's premises where a regulated facility or activity is located or conducted, or where records must be kept under the conditions of the permit; Have access to and copy, at reasonable times, any records that must be kept under the conditions of this permit; Inspect at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this permit, including but not limited to, biosolids treatment, collection, storage facilities or area, transport vehicles and containers, and land application sites; Sample or monitor at reasonable times, for the purpose of assuring permit compliance or as otherwise authorized by the Act, any substances or parameters at any location, including, but not limited to, digested biosolids before dewatering, dewatered biosolids, biosolids transfer or staging areas, any ground or surface waters at the land application sites or biosolids, soils, or vegetation on the land application sites; and, The permittee shall make the necessary arrangements with the landowner or leaseholder to obtain permission or clearance, the Director, or authorized representative, upon the presentation of credentials and other documents as may be required by law, will be permitted to enter without delay for the purposes of performing their responsibilities. COMPLIANCE RESPONSIBILITIES Duty to Comply. The Permittee must comply with all conditions of this permit. Any permit noncompliance constitutes a violation of the Act and is grounds for enforcement action; for permit termination, revocation and reissuance, or modification; or for denial of a permit renewal application. The Permittee shall give advance notice to the Director of any planned changes in the permitted facility or activity, which may result in noncompliance with permit requirements. Penalties for Violations of Permit Conditions. The Act provides that any person who violates a permit condition implementing provisions of the Act is subject to a civil penalty not to exceed $10,000 per day of such violation. Except as provided at Part VI.G, Bypass of Treatment Facilities and Part VI.H, Upset Conditions, nothing in this permit shall be construed to relieve the permittee of the civil or criminal penalties for noncompliance. Need to Halt or Reduce Activity not a Defense. It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this permit. Duty to Mitigate. The Permittee shall take all reasonable steps to minimize or prevent any discharge in violation of this permit, which has a reasonable likelihood of adversely affecting human health or the environment. The permittee shall also take all reasonable steps to minimize or prevent any land application in violation of this permit. Proper Operation and Maintenance. The Permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permittee to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and quality assurance procedures. This provision requires the operation of back-up or auxiliary facilities or similar systems, which are installed by a permittee only when the operation is necessary to achieve compliance with the conditions of the permit. Removed Substances. Collected screening, grit, solids, sludge, or other pollutants removed in the course of treatment shall be disposed of in such a manner so as to prevent any pollutant from entering any waters of the state or creating a health hazard. Sludge/digester supernatant and filter backwash shall not directly enter either the final effluent or waters of the state by any other direct route. Bypass of Treatment Facilities. Bypass Not Exceeding Limitations. The Permittee may allow any bypass to occur which does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to assure efficient operation. These bypasses are not subject to paragraph 2and 3 of this section. Prohibition of Bypass. Bypass is prohibited, and the Director may take enforcement action against a permittee for bypass, unless: Bypass was unavoidable to prevent loss of human life, personal injury, or severe property damage; There were no feasible alternatives to bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate backup equipment should have been installed in the exercise of reasonable engineering judgement to prevent a bypass which occurred during normal periods of equipment downtime or preventive maintenance, and The Permittee submitted notices as required under PartVI.G.3. The Director may approve an anticipated bypass, after considering its adverse effects, if the Director determines that it will meet the three conditions listed in Parts VI.G.2.a (1), (2) and (3). Notice. Anticipated bypass. Except as provided above in PartVI.G.2 and below in PartVI.G.3.b, if the permittee knows in advance of the need for a bypass, it shall submit prior notice, at least ninety days before the date of bypass. The prior notice shall include the following unless otherwise waived by the Director: Evaluation of alternative to bypass, including cost-benefit analysis containing an assessment of anticipated resource damages: A specific bypass plan describing the work to be performed including scheduled dates and times. The permittee must notify the Director in advance of any changes to the bypass schedule; Description of specific measures to be taken to minimize environmental and public health impacts; A notification plan sufficient to alert all downstream users, the public and others reasonably expected to be impacted by the bypass; A water quality assessment plan to include sufficient monitoring of the receiving water before, during and following the bypass to enable evaluation of public health risks and environmental impacts; and, Any additional information requested by the Director. Emergency Bypass. Where ninety days advance notice is not possible, the permittee must notify the Director, and the Director of the Department of Natural Resources, as soon as it becomes aware of the need to bypass and provide to the Director the information in PartVI.G.3.a.(1) through (6) to the extent practicable. Unanticipated bypass. The permittee shall submit notice of an unanticipated bypass to the Director as required under Part IV.H, Twenty-Four Hour Reporting. The permittee shall also immediately notify the Director of the Department of Natural Resources, the public and downstream users and shall implement measures to minimize impacts to public health and environment to the extent practicable. Upset Conditions. Effect of an upset. An upset constitutes an affirmative defense to an action brought for noncompliance with technology-based permit effluent limitations if the requirements of paragraph 2 of this section are met. Director's administrative determination regarding a claim of upset cannot be judiciously challenged by the permittee until such time as an action is initiated for noncompliance. Conditions necessary for a demonstration of upset. A permittee who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs, or other relevant evidence that: An upset occurred and that the permittee can identify the cause(s) of the upset; The permitted facility was at the time being properly operated; The permittee submitted notice of the upset as required under Part V.H, Twenty-four Hour Notice of Noncompliance Reporting; and, The permittee complied with any remedial measures required under Part VI.D, Duty to Mitigate. Burden of proof. In any enforcement proceeding, the permittee seeking to establish the occurrence of an upset has the burden of proof. GENERAL REQUIREMENTS Planned Changes. The permittee shall give notice to the Director as soon as possible of any planned physical alterations or additions to the permitted facility. Notice is required only when: The alteration or addition to a permitted facility may meet one of the criteria for determining whether a facility is a new source in 122.29(b); or The alteration or addition could significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants which are subject neither to effluent limitations in the permit nor to notification requirements under Subsection R317-8-4.1(15). The alteration or addition results in a significant change in the permittee's sludge use or disposal practices, and such alteration, addition, or change may justify the application of permit conditions that are different from or absent in the existing permit, including notification of additional use or disposal sites not reported during the permit application process or not reported pursuant to an approved land application plan.The permittee shall give notice to the Director of any planned changes at least 30 days prior to their implementation. Anticipated Noncompliance. The permittee shall give advance notice to the Director of any planned changes in the permitted facility or activity, which may result in noncompliance with permit requirements. Permit Actions. This permit may be modified, revoked and reissued, or terminated for cause. The filing of a request by the permittee for a permit modification, revocation and reissuance, or termination, or a notification of planned changes or anticipated noncompliance, does not stay any permit condition. Duty to Reapply. If the permittee wishes to continue an activity regulated by this permit after the expiration date of this permit, the permittee shall apply for and obtain a new permit. The application shall be submitted at least 180 days before the expiration date of this permit. Duty to Provide Information. The permittee shall furnish to the Director, within a reasonable time, any information which the Director may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit, or to determine compliance with this permit. The permittee shall also furnish to the Director, upon request, copies of records required to be kept by this permit. Other Information. When the permittee becomes aware that it failed to submit any relevant facts in a permit application, or submitted incorrect information in a permit application or any report to the Director, it shall promptly submit such facts or information. Signatory Requirements. All applications, reports or information submitted to the Director shall be signed and certified. All permit applications shall be signed by either a principal executive officer or ranking elected official. A person is a duly authorized representative only if: The authorization is made in writing by a person described above and submitted to the Director, and, The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility, such as the position of plant manager, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters. A duly authorized representative may thus be either a named individual or any individual occupying a named position. For a corporation. By a responsible corporate officer. For the purpose of this section, a responsible corporate officer means: A president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who perfoms similar policy- or decision-making functions for the corporation, or the manager of one or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long term environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. For a partnership or sole proprietorship. By a general partner or the proprietor, respectively; or For a municipality, State, Federal, or other public agency. By either a principal executive officer or ranking elected official. For purposes of this section, a principal executive officer of a Federal agency includes: The chief executive officer of the agency, or a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency (e.g., Regional Administrators of EPA). All reports required by the permit and other information requested by the Director shall be signed by a person described above or by a duly authorized representative of that person. Changes to authorization. If an authorization under paragraph VII.G.2 is no longer accurate because a different individual or position has responsibility for the overall operation of the facility, a new authorization satisfying the requirements of paragraph VII.G.2. must be submitted to the Director prior to or together with any reports, information, or applications to be signed by an authorized representative. Certification. Any person signing a document under this section shall make the following certification: "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Penalties for Falsification of Reports. The Act provides that any person who knowingly makes any false statement, representation, or certification in any record or other document submitted or required to be maintained under this permit, including monitoring reports or reports of compliance or noncompliance shall, upon conviction be punished by a fine of not more than $10,000.00 per violation, or by imprisonment for not more than six months per violation, or by both. Availability of Reports. Except for data determined to be confidential under UAC R317-8-3.2, all reports prepared in accordance with the terms of this permit shall be available for public inspection at the office of Director. As required by the Act, permit applications, permits and effluent data shall not be considered confidential. Oil and Hazardous Substance Liability. Nothing in this permit shall be construed to preclude the permittee of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties to which the permittee is or may be subject under the Act. Property Rights. The issuance of this permit does not convey any property rights of any sort, or any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal rights, nor any infringement of federal, state or local laws or regulations. Severability. The provisions of this permit are severable, and if any provisions of this permit, or the application of any provision of this permit to any circumstance, is held invalid, the application of such provision to other circumstances, and the remainder of this permit, shall not be affected thereby. Transfers. This permit may be automatically transferred to a new permittee if: The current permittee notifies the Director at least 20 days in advance of the proposed transfer date; The notice includes a written agreement between the existing and new permittee’s containing a specific date for transfer of permit responsibility, coverage, and liability between them; and, The Director does not notify the existing permittee and the proposed new permittee of his or her intent to modify, or revoke and reissue the permit. If this notice is not received, the transfer is effective on the date specified in the agreement mentioned in paragraph 2 above. State or Federal Laws. Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the Permittee from any responsibilities, liabilities, or penalties established pursuant to any applicable state law or regulation under authority preserved bySections19-5-117 and 510 of the Clean Water Act or any applicable Federal or State transportation regulations, such as but not limited to the Department of Transportation regulations. Water Quality - Reopener Provision. This permit may be reopened and modified (following proper administrative procedures) to include the appropriate effluent limitations and compliance schedule, if necessary, if one or more of the following events occurs: Water Quality Standards for the receiving water(s) to which the permittee discharges are modified in such a manner as to require different effluent limits than contained in this permit. A final wasteload allocation is developed and approved by the State and/or EPA for incorporation in this permit. Revisions to the current CWA § 208 areawide treatment management plans or promulgations/revisions to TMDLs (40 CFR 130.7) approved by the EPA and adopted by DWQ which calls for different effluent limitations than contained in this permit. Biosolids – Reopener Provision. This permit may be reopened and modified (following proper administrative procedures) to include the appropriate biosolids limitations (and compliance schedule, if necessary), management practices, other appropriate requirements to protect public health and the environment, or if there have been substantial changes (or such changes are planned) in biosolids use or disposal practices; applicable management practices or numerical limitations for pollutants in biosolids have been promulgated which are more stringent than the requirements in this permit; and/or it has been determined that the permittees biosolids use or land application practices do not comply with existing applicable state of federal regulations. Toxicity Limitation - Reopener Provision. This permit may be reopened and modified (following proper administrative procedures) to include WET testing, a WET limitation, a compliance schedule, a compliance date, additional or modified numerical limitations, or any other conditions related to the control of toxicants if toxicity is detected during the life of this permit. DEFINITIONSWastewater. The “7-day (and weekly) average”, other than for E. coli bacteria, fecal coliform bacteria, and total coliform bacteria, is the arithmetic average of all samples collected during a consecutive 7-day period or calendar week, whichever is applicable. Geometric means shall be calculated for E. coli bacteria, fecal coliform bacteria, and total coliform bacteria. The 7-day and weekly averages are applicable only to those effluent characteristics for which there are 7-day average effluent limitations. The calendar week, which begins on Sunday and ends on Saturday, shall be used for purposes of reporting self-monitoring data on discharge monitoring report forms. Weekly averages shall be calculated for all calendar weeks with Saturdays in the month. If a calendar week overlaps two months (i.e., the Sunday is in one month and the Saturday in the following month), the weekly average calculated for that calendar week shall be included in the data for the month that contains Saturday. The "30-day (and monthly) average," other than for E. coli bacteria, fecal coliform bacteria and total coliform bacteria, is the arithmetic average of all samples collected during a consecutive 30-day period or calendar month, whichever is applicable. Geometric means shall be calculated for E. coli bacteria, fecal coliform bacteria and total coliform bacteria. The calendar month shall be used for purposes of reporting self-monitoring data on discharge monitoring report forms. "Average annual discharge limit" means maximum allowable average of monthly discharges over a calendar year, calculated as the sum of all monthly discharges measured during a calendar year divided by the number of monthly discharges measured during the year. The timeframe is defined as from January 1st to December 31st. “Act,” means the Utah Water Quality Act. “Acute toxicity” occurs when 50 percent or more mortality is observed for either test species at any effluent concentration (lethal concentration or “LC50”). "Annual Loading Cap" is the highest allowable phosphorus loading discharged over a calendar year, calculated as the sum of all the monthly loading discharges measured during a calendar year divided by the number of monthly discharges measured during that year. “Bypass,” means the diversion of waste streams from any portion of a treatment facility. “Chronic toxicity” occurs when the IC25< XX% effluent. The XX% effluent is the concentration of the effluent in the receiving water, at the end of the mixing zone expressed as per cent effluent. "IC25" is the concentration of toxicant (given in % effluent) that would cause a 25% reduction in mean young per female, or a 25% reduction in overall growth for the test population. “Composite Samples” shall be flow proportioned. The composite sample shall, as a minimum, contain at least four (4) samples collected over the compositing period. Unless otherwise specified, the time between the collection of the first sample and the last sample shall not be less than six (6) hours nor more than 24 hours. Acceptable methods for preparation of composite samples are as follows: Constant time interval between samples, sample volume proportional to flow rate at time of sampling; Constant time interval between samples, sample volume proportional to total flow (volume) since last sample. For the first sample, the flow rate at the time the sample was collected may be used; Constant sample volume, time interval between samples proportional to flow (i.e., sample taken every “X” gallons of flow); and, Continuous sample volume, with sample collection rate proportional to flow rate. “CWA”means The Federal Water Pollution Control Act, as amended, by The Clean Water Act of 1987. “Daily Maximum” (Daily Max.) is the maximum value allowable in any single sample or instantaneous measurement. “EPA,” means the United States Environmental Protection Agency. “Director,” means Director of the Division of Water Quality. A “grab” sample, for monitoring requirements, is defined as a single “dip and take” sample collected at a representative point in the discharge stream. An “instantaneous” measurement, for monitoring requirements, is defined as a single reading, observation, or measurement. “Severe Property Damage,” means substantial physical damage to property, damage to the treatment facilities which causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production. “Upset,” means an exceptional incident in which there is unintentional and temporary noncompliance with technology-based permit effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation.