Administrative Code

Virginia Administrative Code
7/16/2024

Part VII. General Pretreatment Regulations for Existing and New Sources of Pollution

Article 4
Pathogens and Vector Attraction Reduction

9VAC25-31-730. Purpose and applicability.

A. This part establishes the responsibilities of state and local government, industry and the public to implement the national pretreatment standards and requirements to control pollutants which pass through or interfere with treatment processes in Publicly Owned Treatment Works (POTWs) or which may contaminate sewage sludge.

B. This part applies:

1. To pollutants from nondomestic sources covered by pretreatment standards which are indirectly discharged into or transported by truck or rail or otherwise introduced into POTWs;

2. To POTWs which receive wastewater from sources subject to national pretreatment standards; and

3. To any new or existing source subject to pretreatment standards. National pretreatment standards do not apply to sources which discharge to a sewer which is not connected to a POTW treatment plant.

Statutory Authority

§§ 62.1-44.15, 62.1-44.16, 62.1-44.17, 62.1-44.18, and 62.1-44.19 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996.

9VAC25-31-740. Objectives of general pretreatment regulations.

By establishing the responsibilities of government and industry to implement national pretreatment standards and requirements this part fulfills three objectives:

A. To prevent the introduction of pollutants into POTWs which will interfere with the operation of a POTW, including interference with its use or disposal of municipal sludge;

B. To prevent the introduction of pollutants into POTWs which will pass through the treatment works or otherwise be incompatible with such works; and

C. To improve opportunities to recycle and reclaim municipal and industrial wastewaters and sludges.

Statutory Authority

§§ 62.1-44.15, 62.1-44.16, 62.1-44.17, 62.1-44.18, and 62.1-44.19 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996.

9VAC25-31-750. Incorporation of federal regulations.

The following federal regulations are hereby incorporated into this chapter:

1. 40 CFR Part 403, Appendix B - E, and Appendix G.

2. 40 CFR Part 136, Guidelines for Establishing Test Procedures for the Analysis of Pollutants.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 16, Issue 25, eff. September 27, 2000; Volume 18, Issue 9, eff. February 15, 2002; Volume 28, Issue 10, eff. February 15, 2012.

9VAC25-31-760. Local law.

Nothing in this part is intended to affect any pretreatment requirements, including any standards or prohibitions, established by local law as long as the local requirements are not less stringent than any set forth in national pretreatment standards, or any other requirements or prohibitions established under the Clean Water Act, the law, or this chapter.

Statutory Authority

§§ 62.1-44.15, 62.1-44.16, 62.1-44.17, 62.1-44.18, and 62.1-44.19 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996.

9VAC25-31-770. National pretreatment standards: prohibited discharges.

A. 1. General prohibitions. A user may not introduce into any POTW any pollutant or pollutants which cause pass through, interference or violation of water quality standards. These general prohibitions and the specific prohibitions in subsection B of this section apply to each user introducing pollutants into a POTW whether or not the user is subject to other national pretreatment standards or any national, state, or local pretreatment requirements.

2. Affirmative defenses. A user shall have an affirmative defense in any action brought against it alleging a violation of the general prohibitions established in subdivision A 1 of this section and the specific prohibitions in subdivisions B 3, 4, 5, 6, and 7 of this section where the user can demonstrate that:

a. It did not know or have reason to know that its discharge, alone or in conjunction with a discharge or discharges from other sources, would cause pass through or interference; and

b. (1) A local limit designed to prevent pass through or interference or both, as the case may be, was developed in accordance with subsection C of this section for each pollutant in the user's discharge that caused pass through or interference, and the user was in compliance with each such local limit directly prior to and during the pass through or interference; or

(2) If a local limit designed to prevent pass through or interference or both, as the case may be, has not been developed in accordance with subsection C of this section for the pollutant or pollutants that caused the pass through or interference, the user's discharge directly prior to and during the pass through or interference did not change substantially in nature or constituents from the user's prior discharge activity when the POTW was regularly in compliance with the POTW's VPDES permit requirements and, in the case of interference, applicable requirements for sewage sludge use or disposal.

B. Specific prohibitions. In addition, the following pollutants shall not be introduced into a POTW:

1. Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to, wastestreams with a closed cup flashpoint of less than 140°F or 60°C using the test methods specified in 40 CFR 261.21;

2. Pollutants which will cause corrosive structural damage to the POTW, but in no case discharges with pH lower than 5.0, unless the works is specifically designed to accommodate such discharges;

3. Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in interference;

4. Any pollutant, including oxygen demanding pollutants (BOD, etc.) released in a discharge at a flow rate or pollutant concentration which will cause interference with the POTW;

5. Heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW treatment plant exceeds 40°C (104°F) unless the director, upon request of the POTW, approves alternate temperature limits;

6. Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through;

7. Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health and safety problems; or

8. Any trucked or hauled pollutants, except at discharge points designated by the POTW.

C. When specific limits must be developed by POTW.

1. Each POTW developing a POTW pretreatment program pursuant to 9VAC25-31-800 shall develop and enforce specific limits to implement the prohibitions listed in subdivisions A 1 and subsection B of this section. Each POTW with an approved pretreatment program shall continue to develop these limits as necessary and effectively enforce such limits.

2. All other POTW's shall, in cases where pollutants contributed by users result in interference, pass through or water quality standards violations and such violation is likely to recur, develop and enforce specific effluent limits for industrial users, and all other users, as appropriate, which, together with appropriate changes in the POTW treatment plant's facilities or operation, are necessary to ensure renewed and continued compliance with the POTW's VPDES permit or sludge use or disposal practices.

3. Specific effluent limits shall not be developed and enforced without individual notice to persons or groups who have requested such notice and an opportunity to respond.

4. All POTWs with approved pretreatment programs shall provide a written technical evaluation of the need to revise their local limits within one year of reissuance of VPDES permits for applicable treatment works, or within one year of VPDES permit modifications resulting in significant changes in VPDES permit limitations, POTW pretreatment operations, or POTW sludge disposal methods.

5. POTWs may develop Best Management Practices (BMPs) to implement subdivisions 1 and 2 of this subsection. Such BMPs shall be considered local limits and pretreatment standards for the purposes of this Part and § 307(d) of the Act.

D. Local limits. Where specific prohibitions or limits on pollutants or pollutant parameters are developed by a POTW in accordance with subsection C of this section, such limits shall be deemed pretreatment standards for the purposes of § 307(d) of the CWA.

E. EPA and state enforcement actions under the law and § 309(f) of the CWA. If, within 30 days after notice of an interference or pass through violation has been sent by the director or EPA to the POTW, and to persons or groups who have requested such notice, the POTW fails to commence appropriate enforcement action to correct the violation, the director or EPA may take appropriate enforcement action under the authority provided by the law and in § 309(f) of the CWA.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 16, Issue 25, eff. September 27, 2000; Volume 18, Issue 9, eff. February 15, 2002; Volume 22, Issue 24, eff. September 6, 2006; Volume 28, Issue 10, eff. February 15, 2012.

9VAC25-31-780. National pretreatment standards: categorical standards.

National pretreatment standards included in the regulations incorporated by reference in 9VAC25-31-30, unless specifically noted otherwise, shall be in addition to all applicable pretreatment standards and requirements set forth in this part.

A. Category determination request.

1. Application deadline. Within 60 days after the effective date of a pretreatment standard for a subcategory under which an industrial user may be included, the industrial user or POTW may request that the Water Management Division Director or director, as appropriate, provide written certification on whether the industrial user falls within that particular subcategory. If an existing industrial user adds or changes a process or operation which may be included in a subcategory, the existing industrial user must request this certification prior to commencing discharge from the added or changed processes or operation. A new source must request this certification prior to commencing discharge. Where a certification is submitted by a POTW, the POTW shall notify any affected industrial user of such submission. The industrial user may provide written comments on the POTW submission to the Water Management Division Director or director, as appropriate, within 30 days of notification.

2. Contents of application. Each request shall contain a statement:

a. Describing which subcategories might be applicable; and

b. Citing evidence and reasons why a particular subcategory is applicable and why others are not applicable. Any person signing the application statement submitted pursuant to 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."

3. Deficient requests. The Water Management Division Director or director will only act on written requests for determinations that contain all of the information required. Persons who have made incomplete submissions will be notified by the Water Management Division Director or director that their requests are deficient and, unless the time period is extended, will be given 30 days to correct the deficiency. If the deficiency is not corrected within 30 days or within an extended period allowed by the Water Management Division Director or the director, the request for a determination shall be denied.

4. Final decision.

a. When the Water Management Division Director or director receives a submittal he will, after determining that it contains all of the information required by subdivision 2 of this subsection, consider the submission, any additional evidence that may have been requested, and any other available information relevant to the request. The Water Management Division Director or director will then make a written determination of the applicable subcategory and state the reasons for the determination.

b. Where the request is submitted to the director, the director shall forward the determination described in this subdivision to the Water Management Division Director who may make a final determination. If the Water Management Division Director does not modify the director's decision within 60 days after receipt thereof, or if the Water Management Division Director waives receipt of the determination, the director's decision is final.

c. Where the request is submitted by the industrial user or POTW to the Water Management Division Director or where the Water Management Division Director elects to modify the director's decision, the Water Management Division Director's decision will be final.

d. The director shall send a copy of the determination to the affected industrial user and the POTW.

5. Requests for public hearing or legal decision. Within 30 days following the date of receipt of notice of the final determination as provided for by subdivision A 4 d of this section, the requester may submit a petition to reconsider or contest the decision to the regional administrator who shall act on such petition expeditiously and state the reasons for his determination in writing.

B. Deadline for compliance with categorical standards. Compliance by existing sources with categorical pretreatment standards shall be within three years of the date the standard is effective unless a shorter compliance time is specified in the regulations incorporated by reference in 9VAC25-31-30. Direct dischargers with VPDES permits modified or reissued to provide a variance pursuant to § 301(i)(2) of the CWA shall be required to meet compliance dates set in any applicable categorical pretreatment standard. Existing sources which become industrial users subsequent to promulgation of an applicable categorical pretreatment standard shall be considered existing industrial users except where such sources meet the definition of a new source as defined in 9VAC25-31-10. New sources shall install and have in operating condition, and shall "start up" all pollution control equipment required to meet applicable pretreatment standards before beginning to discharge. Within the shortest feasible time (not to exceed 90 days), new sources must meet all applicable pretreatment standards.

C. 1. Concentration and mass limits pollutant discharge limits in categorical pretreatment standards will be expressed either as concentration or mass limits. Wherever possible, where concentration limits are specified in standards, equivalent mass limits will be provided so that local, state or federal authorities responsible for enforcement may use either concentration or mass limits. Limits in categorical pretreatment standards shall apply to the effluent of the process regulated by the standard, or as otherwise specified by the standard.

2. When the limits in a categorical pretreatment standard are expressed only in terms of mass of pollutant per unit of production, the control authority may convert the limits to equivalent limitations expressed either as mass of pollutant discharged per day or effluent concentration for purposes of calculating effluent limitations applicable to individual industrial users.

3. A control authority calculating equivalent mass-per-day limitations under subdivision 2 of this subsection shall calculate such limitations by multiplying the limits in the standard by the industrial user's average rate of production. This average rate of production shall be based not upon the designed production capacity but rather upon a reasonable measure of the industrial user's actual long-term daily production, such as the average daily production during a representative year. For new sources, actual production shall be estimated using projected production.

4. A control authority calculating equivalent concentration limitations under subdivision 2 of this subsection shall calculate such limitations by dividing the mass limitations derived under subdivision 3 of this subsection by the average daily flow rate of the industrial user's regulated process wastewater. This average daily flow rate shall be based upon a reasonable measure of the industrial user's actual long-term average flow rate, such as the average daily flow rate during the representative year.

5. When the limits in a categorical pretreatment standard are expressed only in terms of pollutant concentrations, an industrial user may request that the control authority convert the limits to equivalent mass limits. The determination to convert concentration limits to mass limits is within the discretion of the control authority. The control authority may establish equivalent mass limits only if the industrial user meets all the following conditions in subdivisions 5 a (1) through (5) of this subsection as follows.

a. To be eligible for equivalent mass limits, the industrial user must:

(1) Employ, or demonstrate that it will employ, water conservation methods and technologies that substantially reduce water use during the term of its control mechanism;

(2) Currently use control and treatment technologies adequate to achieve compliance with the applicable categorical pretreatment standard, and not have used dilution as a substitute for treatment;

(3) Provide sufficient information to establish the facility's actual average daily flow rate for all wastestreams, based on data from a continuous effluent flow monitoring device, as well as the facility's long-term average production rate. Both the actual average daily flow rate and the long-term average production rate must be representative of current operating conditions;

(4) Not have daily flow rates, production levels, or pollutant levels that vary so significantly that equivalent mass limits are not appropriate to control the discharge; and

(5) Have consistently complied with all applicable categorical pretreatment standards during the period prior to the industrial user's request for equivalent mass limits.

b. An industrial user subject to equivalent mass limits must:

(1) Maintain and effectively operate control and treatment technologies adequate to achieve compliance with the equivalent mass limits;

(2) Continue to record the facility's flow rates through the use of a continuous effluent flow monitoring device;

(3) Continue to record the facility's production rates and notify the control authority whenever production rates are expected to vary by more than 20% from its baseline production rates determined in subdivision 5 a (3) of this subsection. Upon notification of a revised production rate, the Control Authority must reassess the equivalent mass limit and revise the limit as necessary to reflect changed conditions at the facility; and

(4) Continue to employ the same or comparable water conservation methods and technologies as those implemented pursuant to subdivision 5 a (1) of this subsection so long as it discharges under an equivalent mass limit.

c. A control authority that chooses to establish equivalent mass limits:

(1) Must calculate the equivalent mass limit by multiplying the actual average daily flow rate of the regulated process(es) of the industrial user by the concentration-based daily maximum and monthly average standard for the applicable categorical pretreatment standard and the appropriate unit conversion factor;

(2) Upon notification of a revised production rate, must reassess the equivalent mass limit and recalculate the limit as necessary to reflect changed conditions at the facility; and

(3) May retain the same equivalent mass limit in subsequent control mechanism terms if the industrial user's actual average daily flow rate was reduced solely as a result of the implementation of water conservation methods and technologies, and the actual average daily flow rates used in the original calculation of the equivalent mass limit were not based on the use of dilution as a substitute for treatment pursuant to subdivision 5 d of this subsection. The industrial user must also be in compliance with 9VAC25-31-890 (regarding the prohibition of bypass).

d. The control authority may not express limits in terms of mass for pollutants such as pH, temperature, radiation, or other pollutants which cannot appropriately be expressed as mass.

6. The control authority may convert the mass limits of the categorical pretreatment standards at 40 CFR Parts 414, 419, and 455 to concentration limits for purposes of calculating limitations applicable to individual industrial users under the following conditions: when converting such limits to concentration limits, the control authority must use the concentrations listed in the applicable subparts of 40 CFR Parts 414, 419, and 455 and document that dilution is not being substituted for treatment as prohibited by subsection D of this section.

7. Equivalent limitations calculated in accordance with subdivisions 3 4, 5 and 6 of this subsection are deemed pretreatment standards for the purposes of § 307(d) of the CWA and this part. The control authority must document how the equivalent limits were derived and make this information publicly available. Once incorporated into its control mechanism, the individual user must comply with the equivalent limitations in lieu of the promulgated categorical standards from which the equivalent limitations were derived.

8. Many categorical pretreatment standards specify one limit for calculating maximum daily discharge limitations and a second limit for calculating maximum monthly average, or four-day average, limitations. Where such standards are being applied, the same production or flow figure shall be used in calculating both the average and the maximum equivalent limitation.

9. Any industrial user operating under a control mechanism incorporating equivalent mass or concentration limits calculated from a production based standard shall notify the control authority within two business days after the user has a reasonable basis to know that the production level will significantly change within the next calendar month. Any user not notifying the control authority of such anticipated change will be required to meet the mass or concentration limits in its control mechanism that were based on the original estimate of the long term average production rate.

D. Dilution prohibited as substitute for treatment. Except where expressly authorized to do so by an applicable pretreatment standard or requirement, no industrial user shall ever increase the use of process water, or in any other way attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with a pretreatment standard or requirement. The control authority may impose mass limitations on industrial users which are using dilution to meet applicable pretreatment standards or requirements, or in other cases where the imposition of mass limitations is appropriate.

E. Combined wastestream formula. Where process effluent is mixed prior to treatment with wastewaters other than those generated by the regulated process, fixed alternative discharge limits may be derived by the control authority, or by the industrial user with the written concurrence of the control authority. These alternative limits shall be applied to the mixed effluent. When deriving alternative categorical limits, the control authority or industrial user shall calculate both an alternative daily maximum value using the daily maximum values specified in the appropriate categorical pretreatment standard or standards and an alternative consecutive sampling day average value using the monthly average values specified in the appropriate categorical pretreatment standards. The industrial user shall comply with the alternative daily maximum and monthly average limits fixed by the control authority until the control authority modifies the limits or approves an industrial user modification request. Modification is authorized whenever there is a material or significant change in the values used in the calculation to fix alternative limits for the regulated pollutant. An industrial user must immediately report any such material or significant change to the control authority. Where appropriate new alternative categorical limits shall be calculated within 30 days.

1. Alternative limit calculation. For purposes of these formulas, the "average daily flow" means a reasonable measure of the average daily flow for a 30-day period. For new sources, flows shall be estimated using projected values. The alternative limit for a specified pollutant will be derived by the use of either of the following formulas:

a. Alternative concentration limit.

https://law.lis.virginia.gov/RISImages/415708430438LEGLDH_files/image001.gif

where:

CT = the alternative concentration limit for the combined wastestream.

Ci = the categorical pretreatment standard concentration limit for a pollutant in the regulated stream i.

Fi = the average daily flow (at least a 30-day average) of stream i to the extent that it is regulated for such pollutant.

FD = the average daily flow (at least a 30-day average) from: (i) boiler blowdown streams, noncontact cooling streams, stormwater streams, and demineralizer backwash streams; provided, however, that where such streams contain a significant amount of a pollutant, and the combination of such streams, prior to treatment, with an industrial user's regulated process wastestreams will result in a substantial reduction of that pollutant, the control authority, upon application of the industrial user, may exercise its discretion to determine whether such streams should be classified as diluted or unregulated. In its application to the control authority, the industrial user must provide engineering, production, sampling and analysis and such other information so that the control authority can make its determination; (ii) sanitary wastestreams where such streams are not regulated by a categorical pretreatment standard; or (iii) any process wastestreams which were or could have been entirely exempted from categorical pretreatment standards for one or more of the following reasons (see Appendix D of 40 CFR Part 403):

(1) The pollutants of concern are not detectable in the effluent from the industrial user;

(2) The pollutants of concern are present only in trace amounts and are neither causing nor likely to cause toxic effects;

(3) The pollutants of concern are present in amounts too small to be effectively reduced by technologies known to the administrator; or

(4) The wastestream contains only pollutants which are compatible with the POTW.

FT = The average daily flow (at least a 30-day average) through the combined treatment facility (includes Fi, FD and unregulated streams).

N = The total number of regulated streams.

b. Alternative mass limit.

https://law.lis.virginia.gov/RISImages/415708430438LEGLDH_files/image002.gif

where:

MT = the alternative mass limit for a pollutant in the combined wastestream.

Mi = the categorical pretreatment standard mass limit for a pollutant in the regulated stream i (the categorical pretreatment mass limit multiplied by the appropriate measure of production).

Fi = the average flow (at least a 30-day average) of stream i to the extent that it is regulated for such pollutant.

FD = the average daily flow (at least a 30-day average) from: (i) boiler blowdown streams, noncontact cooling streams, stormwater streams, and demineralizer backwash streams; provided, however, that where such streams contain a significant amount of a pollutant, and the combination of such streams, prior to treatment, with an industrial user's regulated process wastestreams will result in a substantial reduction of that pollutant, the control authority, upon application of the industrial user, may exercise its discretion to determine whether such streams should be classified as diluted or unregulated. In its application to the control authority, the industrial user must provide engineering, production, sampling and analysis and such other information so that the control authority can make its determination; (ii) sanitary wastestreams where such streams are not regulated by a categorical pretreatment standard; or (iii) any process wastestreams which were or could have been entirely exempted from categorical pretreatment standards for one or more of the following reasons (see Appendix D of 40 CFR Part 403):

(1) The pollutants of concern are not detectable in the effluent from the industrial user;

(2) The pollutants of concern are present only in trace amounts and are neither causing nor likely to cause toxic effects;

(3) The pollutants of concern are present in amounts too small to be effectively reduced by technologies known to the administrator; or

(4) The wastestream contains only pollutants which are compatible with the POTW.

FT = The average flow (at least a 30-day average) through the combined treatment facility (includes Fi, FD and unregulated streams).

N = The total number of regulated streams.

2. An alternative pretreatment limit may not be used if the alternative limit is below the analytical detection limit for any of the regulated pollutants.

3. Self-monitoring required to insure compliance with the alternative categorical limit shall be conducted in accordance with the requirements of 9VAC25-31-840 G.

4. Where a treated regulated process wastestream is combined prior to treatment with wastewaters other than those generated by the regulated process, the industrial user may monitor either the segregated process wastestream or the combined wastestream for the purpose of determining compliance with applicable pretreatment standards. If the industrial user chooses to monitor the segregated process wastestream, it shall apply the applicable categorical pretreatment standard. If the user chooses to monitor the combined wastestream, it shall apply an alternative discharge limit calculated using the combined wastestream formula as provided in this section. The industrial user may change monitoring points only after receiving approval from the control authority. The control authority shall ensure that any change in an industrial user's monitoring point or points will not allow the user to substitute dilution for adequate treatment to achieve compliance with applicable standards.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 16, Issue 25, eff. September 27, 2000; Volume 18, Issue 9, eff. February 15, 2002; Volume 22, Issue 24, eff. September 6, 2006; Volume 28, Issue 10, eff. February 15, 2012.

9VAC25-31-790. Removal credits.

A. General.

1. Definitions for the purpose of this section:

"Removal" means a reduction in the amount of a pollutant in the POTW's effluent or alteration of the nature of a pollutant during treatment at the POTW. The reduction or alteration can be obtained by physical, chemical or biological means and may be the result of specifically designed POTW capabilities or may be incidental to the operation of the treatment system. Removal as used in this subpart shall not mean dilution of a pollutant in the POTW.

"Sludge requirements" means the following statutory provisions and regulations or permits issued thereunder (or more stringent Virginia or local regulations): § 405 of the CWA; the Solid Waste Disposal Act (SWDA) (42 USC § 6901 et seq.) (including Title II more commonly referred to as the Resource Conservation Recovery Act (RCRA) (42 USC § 6901 et seq.) and Virginia regulations contained in any Virginia sludge management plan prepared pursuant to Subtitle D of SWDA); the Clean Air Act (42 USC § 4701 et seq.); the Toxic Substances Control Act (15 USC § 2601 et seq.); and the Marine Protection, Research and Sanctuaries Act (33 USC § 1401 et seq.).

2. General. Any POTW receiving wastes from an industrial user to which a categorical pretreatment standards applies may, at its discretion and subject to the conditions of this section, grant removal credits to reflect removal by the POTW of pollutants specified in the categorical pretreatment standards. The POTW may grant a removal credit equal to or, at its discretion, less than its consistent removal rate. Upon being granted a removal credit, each affected industrial user shall calculate its revised discharge limits in accordance with subdivision 4 of this subsection. Removal credits may only be given for indicator or surrogate pollutants regulated in a categorical pretreatment standard if the categorical pretreatment statement so specifies.

3. Conditions for authorization to give removal credits. A POTW is authorized to give removal credits only if the following conditions are met;

a. Application. The POTW applies for, and receives, authorization from the director to give a removal credit in accordance with the requirements and procedures specified in subsection E of this section;

b. Consistent removal determination. The POTW demonstrates and continues to achieve consistent removal of the pollutant in accordance with subsection B of this section;

c. POTW local pretreatment program. The POTW has an approved pretreatment program in accordance with and to the extent required by this part; provided, however, a POTW which does not have an approved pretreatment program may, pending approval of such a program, conditionally give credits as provided in subsection D of this section;

d. Sludge requirements. The granting of removal credits will not cause the POTW to violate the local, state and federal sludge requirements which apply to the sludge management method chosen by the POTW. Alternatively, the POTW can demonstrate to the director that even though it is not presently in compliance with applicable sludge requirements, it will be in compliance when the industrial users to whom the removal credit would apply is required to meet its categorical pretreatment standards as modified by the removal credit. If granting removal credits forces a POTW to incur greater sludge management costs than would be incurred in the absence of granting removal costs, the additional sludge management costs will not be eligible for EPA grant assistance. Removal credits may be made available for the following pollutants:

(1) For any pollutant listed in Appendix G-I of the regulation incorporated by reference in 9VAC25-31-750 for the use or disposal practice employed by the POTW, when the requirements of Part VI of this chapter for that practice are met;

(2) For any pollutant listed in Appendix G-II of the regulation incorporated by reference in 9VAC25-31-750 for the use or disposal practice employed by the POTW when the concentration for a pollutant listed in Appendix G-II of the regulation incorporated by reference in 9VAC25-31-750 in the sewage sludge that is used or disposed does not exceed the concentration for the pollutant in Appendix G-II of the regulation incorporated by reference in 9VAC25-31-750; and

(3) For any pollutant in sewage sludge when the POTW disposes all of its sewage sludge in a municipal solid waste landfill that meets the criteria in the Code of Virginia and the Solid Waste Management Regulations, 9VAC20-81;

e. VPDES permit limitations. The granting of removal credits will not cause a violation of the POTW's permit limitations or conditions. Alternatively, the POTW can demonstrate to the director that even though it is not presently in compliance with applicable limitations and conditions in its VPDES permit, it will be in compliance when the industrial user or users to whom the removal credit would apply is required to meet its categorical pretreatment standard or standards, as modified by the removal credit provision.

4. Calculation of revised discharge limits. Revised discharge limits for a specific pollutant shall be derived by use of the following formula:

y =

x

1 - r

where:

x = pollutant discharge limit specified in the applicable categorical pretreatment standard

r = removal credit for that pollutant as established under subsection B of this section (percentage removal expressed as a proportion, i.e., a number between 0 and 1)

y = revised discharge limit for the specified pollutant (expressed in same units as x)

B. Establishment of removal credits; demonstration of consistent removal.

1. Definition of "consistent removal." "Consistent removal" means the average of the lowest 50% of the removal measured according to subdivision 2 of this subsection. All sample data obtained for the measured pollutant during the time period prescribed in subdivision 2 of this subsection must be reported and used in computing consistent removal. If a substance is measurable in the influent but not in the effluent, the effluent level may be assumed to be the limit of measurement, and those data may be used by the POTW at its discretion and subject to approval by the director. If the substance is not measurable in the influent, the data may not be used. Where the number of samples with concentrations equal to or above the limit of measurement is between eight and 12, the average of the lowest six removals shall be used. If there are less than eight samples with concentrations equal to or above the limit of measurement, the director may approve alternate means for demonstrating consistent removal. The term "measurement" refers to the ability of the analytical method or protocol to quantify as well as identify the presence of the substance in question.

2. Consistent removal data. Influent and effluent operational data demonstrating consistent removal or other information, as provided for in subdivision 1 of this subsection, which demonstrates consistent removal of the pollutants for which discharge limit revisions are proposed. This data shall meet the following requirements:

a. Representative data; seasonal. The data shall be representative of yearly and seasonal conditions to which the POTW is subjected for each pollutant for which a discharge limit revision is proposed;

b. Representative data; quality and quantity. The data shall be representative of the quality and quantity of normal effluent and influent flow if such data can be obtained. If such data are unobtainable, alternate data or information may be presented for approval to demonstrate consistent removal as provided for in subdivision 1 of this subsection;

c. Sampling procedures: composite.

(1) The influent and effluent operational data shall be obtained through 24-hour flow-proportional composite samples. Sampling may be done manually or automatically, and discretely or continuously. For discrete sampling, at least 12 aliquots shall be composited. Discrete sampling may be flow-proportioned either by varying the time interval between each aliquot or the volume of each aliquot. All composites must be flow proportional to each stream flow at time of collection of influent aliquot or to the total influent flow since the previous influent aliquot. Volatile pollutant aliquots must be combined in the laboratory immediately before analysis.

(2)(a) Twelve samples shall be taken at approximately equal intervals throughout one full year. Sampling must be evenly distributed over the days of the week so as to include no-workdays as well as workdays. If the director determines that this schedule will not be most representative of the actual operation of the POTW treatment plant, an alternative sampling schedule will be approved.

(b) In addition, upon the director's concurrence, a POTW may utilize an historical data base amassed prior to July 24, 1996, provide that such data otherwise meet the requirements of this paragraph. In order for the historical data base to be approved it must present a statistically valid description of daily, weekly and seasonal sewage treatment plant loadings and performance for at least one year.

(3) Effluent sample collection need not be delayed to compensate for hydraulic detention unless the POTW elects to include detention time compensation or unless the director requires detention time compensation. The director may require that each effluent sample be taken approximately one detention time later than the corresponding influent sample when failure to do so would result in an unrepresentative portrayal of actual POTW operation. The detention period is to be based on a 24-hour average daily flow value. The average daily flow used will be based upon the average of the daily flows during the same month of the previous year.

d. Sampling procedures: Grab. Where composite sampling is not an appropriate sampling technique, a grab sample or samples shall be taken to obtain influent and effluent operational data. Collection of influent grab samples should precede collection of effluent samples by approximately one detention period. The detention period is to be based on a 24-hour average daily flow value. The average daily flow used will be based upon the average of the daily flows during the same month of the previous year. Grab samples will be required, for example, where the parameters being evaluated are those, such as cyanide and phenol, which may not be held for any extended period because of biological, chemical or physical interactions which take place after sample collection and affect the results. A grab sample is an individual sample collected over a period of time not exceeding 15 minutes;

e. Analytical methods. The sampling referred to in subdivisions 2 a through d of this subsection and an analysis of these samples shall be performed in accordance with the techniques prescribed in 40 CFR Part 136 and amendments thereto. Where 40 CFR Part 136 does not contain sampling or analytical techniques for the pollutant in question, or where the administrator determines that the Part 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analysis shall be performed using validated analytical methods or any other applicable sampling and analytical procedures, including procedures suggested by the POTW or other parties, approved by the administrator; and

f. Calculation of removal. All data acquired under the provisions of this section must be submitted to the department. Removal for a specific pollutant shall be determined either, for each sample, by measuring the difference between the concentrations of the pollutant in the influent and effluent of the POTW and expressing the difference as a percentage of the influent concentration, or, where such data cannot be obtained, removal may be demonstrated using other data or procedures subject to concurrence by the director as provided for in subdivision 1 of this subsection.

C. Provisional credits. For pollutants which are not being discharged currently (i.e., new or modified facilities, or production changes) the POTW may apply for authorization to give removal credits prior to the initial discharge of the pollutant. Consistent removal shall be based provisionally on data from treatability studies or demonstrated removal at other treatment facilities where the quality and quantity of influent are similar. Within 18 months after the commencement of discharge of pollutants in question, consistent removal must be demonstrated pursuant to the requirements of subsection B of this section. If, within 18 months after the commencement of the discharge of the pollutant in question, the POTW cannot demonstrate consistent removal pursuant to the requirements of subsection B of this section, the authority to grant provisional removal credits shall be terminated by the director and all industrial users to whom the revised discharge limits had been applied shall achieve compliance with the applicable categorical pretreatment standards within a reasonable time, not to exceed the period of time prescribed in the applicable categorical pretreatment standards, as may be specified by the director.

D. Exception to POTW pretreatment program requirement. A POTW required to develop a local pretreatment program by 9VAC25-31-800 may conditionally give removal credits pending approval of such a program in accordance with the following terms and conditions:

1. All industrial users who are currently subject to a categorical pretreatment standard and who wish conditionally to receive a removal credit must submit to the POTW the information required in 9VAC25-31-840 B 1 through 7 (except new or modified industrial users must only submit the information required by 9VAC25-31-840 B 1 through 6), pertaining to the categorical pretreatment standard as modified by the removal credit. The industrial users shall indicate what additional technology, if any, will be needed to comply with the categorical pretreatment standard or standards as modified by the removal credit;

2. The POTW must have submitted to the department an application for pretreatment program approval meeting the requirements of 9VAC25-31-800 and 9VAC25-31-810 in a timely manner, not to exceed the time limitation set forth in a compliance schedule for development of a pretreatment program included in the POTW's VPDES permit, but in no case later than July 1, 1983, where no permit deadline exists;

3. The POTW must:

a. Compile and submit data demonstrating its consistent removal in accordance with subsection B of this section;

b. Comply with the conditions specified in subdivision A 3 of this section; and

c. Submit a complete application for removal credit authority in accordance with subsection E of this section;

4. If a POTW receives authority to grant conditional removal credits and the director subsequently makes a final determination, after appropriate notice, that the POTW failed to comply with the conditions in subdivisions 2 and 3 of this subsection, the authority to grant conditional removal credits shall be terminated by the director and all industrial users to whom the revised discharge limits had been applied shall achieve compliance with the applicable categorical pretreatment standards within a reasonable time, not to exceed the period of time prescribed in the applicable categorical pretreatment standards, as may be specified by the director;

5. If a POTW grants conditional removal credits and the POTW or the director subsequently makes a final determination, after appropriate notice, that the industrial user or users failed to comply with the conditions in subdivision 1 of this subsection, the conditional credit shall be terminated by the POTW or the director for the noncomplying industrial user or users and the industrial user or users to whom the revised discharge limits had been applied shall achieve compliance with the applicable categorical pretreatment standards within a reasonable time, not to exceed the period of time prescribed in the applicable categorical pretreatment standards, as may be specified by the director. The conditional credit shall not be terminated where a violation of the provisions of this paragraph results from causes entirely outside of the control of the industrial user or users or the industrial user or users had demonstrated subsequential compliance; and

6. The director may elect not to review an application for conditional removal credit authority upon receipt of such application, in which case the conditionally revised discharge limits will remain in effect until reviewed by the director. This review may occur at any time in accordance with the procedures of 9VAC25-31-830, but in no event later than the time of any pretreatment program approval or any VPDES permit reissuance thereunder.

E. POTW application for authorization to give removal credits and director review.

1. Who must apply. Any POTW that wants to give a removal credit must apply for authorization from the director.

2. To whom application is made. An application for authorization to give removal credits (or modify existing ones) shall be submitted by the POTW to the department.

3. When to apply. A POTW may apply for authorization to give or modify removal credits at any time.

4. Contents of the application. An application for authorization to give removal credits must be supported by the following information:

a. List of pollutants. A list of pollutants for which removal credits are proposed;

b. Consistent removal data. The data required pursuant to subsection B of this section;

c. Calculation of revised discharge limits. Proposed revised discharge limits for each affected subcategory of industrial users calculated in accordance with subdivision A 4 of this section;

d. Local pretreatment program certification. A certification that the POTW has an approved local pretreatment program or qualifies for the exception to this requirement found at subsection D of this section;

e. Sludge management certification. A specific description of the POTW's current methods of using or disposing of its sludge and a certification that the granting of removal credits will not cause a violation of the sludge requirements identified in subdivision A 3 d of this section; and

f. VPDES permit limit certification. A certification that the granting of removal credits will not cause a violation of the POTW's VPDES permit limits and conditions as required in subdivision A 3 e of this section.

5. Director review. The director shall review the POTW's application for authorization to give or modify removal credits in accordance with the procedures of 9VAC25-31-830 and shall, in no event, have more than 180 days from public notice of an application to complete review.

6. Nothing in this part precludes an industrial user or other interested party from assisting the POTW in preparing and presenting the information necessary to apply for authorization.

F. Continuation and withdrawal of authorization.

1. Effect of authorization. Once a POTW has received authorization to grant removal credits for a particular pollutant regulated in a categorical pretreatment standard it may automatically extend that removal credit to the same pollutant when it is regulated in other categorical standards, unless granting the removal credit will cause the POTW to violate the sludge requirements identified in subdivision A 3 d of this section or its VPDES permit limits and conditions as required by subdivision A 3 e of this section. If a POTW elects at a later time to extend removal credits to a certain categorical pretreatment standard, industrial subcategory or one or more industrial users that initially were not granted removal credits, it must notify the department.

2. Inclusion in POTW permit. Once authority is granted, the removal credits shall be included in the POTW's VPDES permit as soon as possible and shall become an enforceable requirement of the POTW's VPDES permit. The removal credits will remain in effect for the term of the POTW's VPDES permit, provided the POTW maintains compliance with the conditions specified in subdivision 4 of this subsection.

3. Compliance monitoring. Following authorization to give removal credits, a POTW shall continue to monitor and report on (at such intervals as may be specified by the director, but in no case less than once per year) the POTW's removal capabilities. A minimum of one representative sample per month during the reporting period is required, and all sampling data must be included in the POTW's compliance report.

4. Modification or withdrawal of removal credits.

a. Notice of POTW. The director shall notify the POTW if, on the basis of pollutant removal capability reports received pursuant to subdivision 3 of this subsection or other relevant information available to it, the director determines:

(1) That one or more of the discharge limit revisions made by the POTW, of the POTW itself, no longer meets the requirements of this section, or

(2) That such discharge limit revisions are causing a violation of any conditions or limits contained in the POTW's VPDES Permit.

b. Corrective action. If appropriate corrective action is not taken within a reasonable time, not to exceed 60 days unless the POTW or the affected industrial users demonstrate that a longer time period is reasonably necessary to undertake the appropriate corrective action, the director shall either withdraw such discharge limits or require modifications in the revised discharge limits.

c. Public notice of withdrawal or modification. The director shall not withdraw or modify revised discharge limits unless it shall first have notified the POTW and all industrial users to whom revised discharge limits have been applied, and made public, in writing, the reasons for such withdrawal or modification, and an opportunity is provided for a public hearing. Following such notice and withdrawal or modification, all industrial users to whom revised discharge limits had been applied, shall be subject to the modified discharge limits or the discharge limits prescribed in the applicable categorical pretreatment standards, as appropriate, and shall achieve compliance with such limits within a reasonable time (not to exceed the period of time prescribed in the applicable categorical pretreatment standards) as may be specified by the director.

G. Removal credits in state-run pretreatment programs. Where the director elects to implement a local pretreatment program in lieu of requiring the POTW to develop such a program the POTW will not be required to develop a pretreatment program as a precondition to obtaining authorization to give removal credits. The POTW will, however, be required to comply with the other conditions of subdivision A 3 of this section.

H. Compensation for overflow. For the purpose of this section, "overflow" means the intentional or unintentional diversion of flow from the POTW before the POTW treatment plant. POTWs which at least once annually overflow untreated wastewater to receiving waters may claim consistent removal of a pollutant only by complying with either subdivision 1 or 2 of this subsection. However, this subsection shall not apply where industrial users can demonstrate that overflow does not occur between the industrial users and the POTW treatment plant:

1. The industrial user provides containment or otherwise ceases or reduces discharges from the regulated processes which contain the pollutant for which an allowance is requested during all circumstances in which an overflow event can reasonably be expected to occur at the POTW or at a sewer to which the industrial user is connected. Discharges must cease or be reduced, or pretreatment must be increased, to the extent necessary to compensate for the removal not being provided by the POTW. Allowances under this provision will only be granted where the POTW submits to the department evidence that:

a. All industrial users to which the POTW proposes to apply this provision have demonstrated the ability to contain or otherwise cease or reduce, during circumstances in which an overflow event can reasonably be expected to occur, discharges from the regulated processes which contain pollutants for which an allowance is requested;

b. The POTW has identified circumstances in which an overflow event can reasonably be expected to occur, and has a notification or other viable plan to insure that industrial users will learn of an impending overflow in sufficient time to contain, cease or reduce discharging to prevent untreated overflows from occurring. The POTW must also demonstrate that it will monitor and verify the data required in subdivision 1 c of this subsection, to insure that industrial users are containing, ceasing or reducing operations during POTW system overflow; and

c. All industrial users to which the POTW proposes to apply this provision have demonstrated the ability and commitment to collect and make available, upon request by the POTW, the director or EPA Regional Administrator, daily flow reports or other data sufficient to demonstrate that all discharges from regulated processes containing the pollutant for which the allowance is requested were contained, reduced or otherwise ceased, as appropriate, during all circumstances in which an overflow event was reasonably expected to occur; or

2. a. The consistent removal claimed is reduced pursuant to the following equation:

rc =

rm 8760 - z

8760

where:

rm = POTW's consistent removal rate for that pollutant as established under subsections A 1 and B 2 of this section

rc = removal corrected by the overflow factor

Z = hours per year that overflow occurred between the industrial user or users and the POTW treatment plant, the hours either to be shown in the POTW's current VPDES permit application or the hours, as demonstrated by verifiable techniques, that a particular industrial user's discharge overflows between the industrial user and the POTW treatment plant.

b. The POTW is complying with all VPDES permit requirements and any additional requirements in any order or decree, issued pursuant to the Clean Water Act affecting combined sewer outflows. These requirements include, but are not limited to, any combined sewer overflow requirements that conform to the Combined Sewer Overflow Control Policy.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 18, Issue 9, eff. February 15, 2002; Volume 22, Issue 24, eff. September 6, 2006; Volume 27, Issue 26, eff. September 28, 2011; Volume 28, Issue 10, eff. February 15, 2012.

9VAC25-31-800. Pretreatment program requirements: development and implementation by POTW.

A. POTWs required to develop a pretreatment program. Any POTW (or combination of POTWs operated by the same authority) with a total design flow greater than five million gallons per day (mgd) and receiving from industrial users pollutants that pass through or interfere with the operation of the POTW or are otherwise subject to pretreatment standards will be required to establish a POTW pretreatment program unless the director exercises his or her option to assume local responsibilities. The regional administrator or director may require that a POTW with a design flow of five mgd or less develop a POTW pretreatment program if he finds that the nature or volume of the industrial influent, treatment process upsets, violations of POTW effluent limitations, contamination of municipal sludge, violations of water quality standards, or other circumstances warrant in order to prevent interference with the POTW or pass through.

B. Deadline for program approval. POTWs identified as being required to develop a POTW pretreatment program under subsection A of this section shall develop and submit such a program for approval as soon as possible, but in no case later than one year after written notification from the director of such identification. The approved program shall be in operation within two years of the effective date of the permit. The POTW pretreatment program shall meet the criteria set forth in subsection F of this section and shall be administered by the POTW to ensure compliance by industrial users with applicable pretreatment standards and requirements.

C. Incorporation of approved programs in permits. A POTW may develop an appropriate POTW pretreatment program any time before the time limit set forth in subsection B of this section. The POTW's VPDES permit will be reissued or modified to incorporate the approved program as enforceable conditions of the permit. The modification of a POTW's VPDES permit for the purposes of incorporating a POTW pretreatment program approved in accordance with the procedures in 9VAC25-31-830 shall be deemed a minor permit modification subject to the procedures in 9VAC25-31-400.

D. Incorporation of compliance schedules in permits. (Reserved.)

E. Cause for revocation and reissuance or modification of permits. Under the authority of the law and § 402 (b)(1)(C) of the CWA, the director may modify, or alternatively, revoke and reissue a POTW's permit in order to:

1. Put the POTW on a compliance schedule for the development of a POTW pretreatment program where the addition of pollutants into a POTW by an industrial user or combination of industrial users presents a substantial hazard to the functioning of the treatment works, quality of the receiving waters, human health, or the environment;

2. Coordinate the issuance of § 201 construction grant with the incorporation into a permit of a compliance schedule for POTW pretreatment program;

3. Incorporate a modification of the permit approved under § 301(h) or § 301(i) of the CWA;

4. Incorporate an approved POTW pretreatment program in the POTW permit;

5. Incorporate a compliance schedule for the development of a POTW pretreatment program in the POTW permit; or

6. Incorporate the removal credits (established under 9VAC25-31-790) in the POTW permit.

F. POTW pretreatment requirements. A POTW pretreatment program must be based on the following legal authority and include the following procedures. These authorities and procedures shall at all times be fully and effectively exercised and implemented.

1. Legal authority. The POTW shall operate pursuant to legal authority enforceable in federal, state or local courts, which authorizes or enables the POTW to apply and to enforce the requirements of §§ 307(b), (c) and (d), and 402(b)(8) of the CWA and any regulations implementing those sections. Such authority may be contained in a statute, ordinance, or series of contracts or joint powers agreements that the POTW is authorized to enact, enter into or implement, and which are authorized by state law. At a minimum, this legal authority shall enable the POTW to:

a. Deny or condition new or increased contributions of pollutants, or changes in the nature of pollutants, to the POTW by industrial users where such contributions do not meet applicable pretreatment standards and requirements or where such contributions would cause the POTW to violate its VPDES permit.

b. Require compliance with applicable pretreatment standards and requirements by industrial users.

c. Control through permit, or order the contribution to the POTW by each industrial user to ensure compliance with applicable pretreatment standards and requirements. In the case of industrial users identified as significant under 9VAC25-31-10, this control shall be achieved through individual permits or equivalent individual control mechanisms issued to each such user except as follows:

(1)(a) At the discretion of the POTW, this control may include use of general control mechanisms if the following conditions are met. All of the facilities to be covered must:

(i) Involve the same or substantially similar types of operations;

(ii) Discharge the same types of wastes;

(iii) Require the same effluent limitations;

(iv) Require the same or similar monitoring; and

(v) In the opinion of the POTW, be more appropriately controlled under a general control mechanism than under individual control mechanisms.

(b) To be covered by the general control mechanism, the significant industrial user must file a written request for coverage that identifies its contact information, production processes, the types of wastes generated, the location for monitoring all wastes covered by the general control mechanism, any requests in accordance with 9VAC25-31-840 E 2 for a monitoring waiver for a pollutant neither present nor expected to be present in the discharge, and any other information the POTW deems appropriate. A monitoring waiver for a pollutant neither present nor expected to be present in the discharge is not effective in the general control mechanism until after the POTW has provided written notice to the significant industrial user that such a waiver request has been granted in accordance with 9VAC25-31-840 E 2. The POTW must retain a copy of the general control mechanism, documentation to support the POTW's determination that a specific significant industrial user meets the criteria in subdivisions 1 c (1) (a) (i) through (v) of this subsection, and a copy of the user's written request for coverage for three years after the expiration of the general control mechanism. A POTW may not control a significant industrial user through a general control mechanism where the facility is subject to production-based categorical pretreatment standards or categorical pretreatment standards expressed as mass of pollutant discharged per day or for industrial users whose limits are based on the Combined Wastestream Formula or Net/Gross calculations (9VAC25-31-780 E and 9VAC25-31-870).

(2) Both individual and general control mechanisms must be enforceable and contain, at a minimum, the following conditions:

(a) Statement of duration (in no case more than five years);

(b) Statement of nontransferability without, at a minimum, prior notification to the POTW and provision of a copy of the existing control mechanism to the new owner or operator;

(c) Effluent limits, including Best Management Practices, based on applicable general pretreatment standards in this part, categorical pretreatment standards, local limits, and the law;

(d) Self-monitoring, sampling, reporting, notification and recordkeeping requirements, including an identification of the pollutants to be monitored (including the process for seeking a waiver for a pollutant neither present nor expected to be present in the discharge in accordance with 9VAC25-31-840 E 2, or a specific waiver pollutant in the case of an individual control mechanism), sampling location, sampling frequency, and sample type, based on the applicable general pretreatment standards in this part, categorical pretreatment standards, local limits, and the law;

(e) Statement of applicable civil and criminal penalties for violation of pretreatment standards and requirements; and any applicable compliance schedules, which may not extend beyond applicable federal deadlines.

(f) Requirements to control slug discharges, if determined by the POTW to be necessary.

d. Require:

(1) The development of a compliance schedule by each industrial user for the installation of technology required to meet applicable pretreatment standards and requirements; and

(2) The submission of all notices and self-monitoring reports from industrial users as are necessary to assess and ensure compliance by industrial users with pretreatment standards and requirements, including but not limited to the reports required in 9VAC25-31-840.

e. Carry out all inspection, surveillance and monitoring procedures necessary to determine, independent of information supplied by industrial users, compliance or noncompliance with applicable pretreatment standards and requirements by industrial users. Representatives of the POTW shall be authorized to enter any premises of any industrial user in which a discharge source or treatment system is located or in which records are required to be kept under 9VAC25-31-840 O to ensure compliance with pretreatment standards. Such authority shall be at least as extensive as the authority provided under § 308 of the CWA.

f. Obtain remedies for noncompliance by any industrial user with any pretreatment standard and requirement. All POTWs shall be able to seek injunctive relief for noncompliance by industrial users with pretreatment standards and requirements. All POTWs shall also have authority to seek or assess civil or criminal penalties in at least the amount of $1,000 a day for each violation by industrial users of pretreatment standards and requirements.

Pretreatment requirements which will be enforced through the remedies set forth in this subdivision, will include the duty to allow or carry out inspections, entry, or monitoring activities; any rules, regulations, or orders issued by the POTW; any requirements set forth in individual control mechanisms issued by the POTW; or any reporting requirements imposed by the POTW or this part. The POTW shall have authority and procedures (after informal notice to the discharger) to immediately and effectively halt or prevent any discharge of pollutants to the POTW which reasonably appears to present an imminent endangerment to the health or welfare of persons. The POTW shall also have authority and procedures (which shall include notice to the affected industrial users and an opportunity to respond) to halt or prevent any discharge to the POTW which presents or may present an endangerment to the environment or which threatens to interfere with the operation of the POTW. The director shall have authority to seek judicial relief and may also use administrative penalty authority when the POTW has sought a monetary penalty which the director believes to be insufficient.

g. Comply with the confidentiality requirements set forth in 9VAC25-31-860.

2. Procedures. The POTW shall develop and implement procedures to ensure compliance with the requirements of a pretreatment program. At a minimum, these procedures shall enable the POTW to:

a. Identify and locate all possible industrial users that might be subject to the POTW pretreatment program. Any compilation, index or inventory of industrial users made under this subdivision shall be made available to the regional administrator or department upon request.

b. Identify the character and volume of pollutants contributed to the POTW by the industrial users identified under subdivision 2 a of this subsection. This information shall be made available to the regional administrator or department upon request.

c. Notify industrial users identified under subdivision 2 a of this subsection, of applicable pretreatment standards and any applicable requirements under §§ 204(b) and 405 of the CWA and subtitles C and D of the Resource Conservation and Recovery Act (42 USC § 6901 et seq.). Within 30 days of approval pursuant to 9VAC25-31-800 F 6, of a list of significant industrial users, notify each significant industrial user of its status as such and of all requirements applicable to it as a result of such status.

d. Receive and analyze self-monitoring reports and other notices submitted by industrial users in accordance with the self-monitoring requirements in 9VAC25-31-840.

e. Randomly sample and analyze the effluent from industrial users and conduct surveillance activities in order to identify, independent of information supplied by industrial users, occasional and continuing noncompliance with pretreatment standards. Inspect and sample the effluent from each significant industrial user at least once a year except as otherwise specified below.

(1) Where the POTW has authorized the industrial user subject to a categorical pretreatment standard to forego sampling of a pollutant regulated by a categorical pretreatment standard in accordance with 9VAC25-31-840 E the POTW must sample for the waived pollutant at least once during the term of the categorical industrial user's control mechanism. In the event that the POTW subsequently determines that a waived pollutant is present or is expected to be present in the industrial user's wastewater based on changes that occur in the user's operations, the POTW must immediately begin at least annual effluent monitoring of the user's discharge and inspection.

(2) Where the POTW has determined that an industrial user meets the criteria for classification as a nonsignificant categorical industrial user, the POTW must evaluate, at least once per year, whether an industrial user continues to meet the criteria in 9VAC25-31-10.

(3) In the case of industrial users subject to reduced reporting requirements under 9VAC25-31-840 E, the POTW must randomly sample and analyze the effluent from industrial users and conduct inspections at least once every two years. If the industrial user no longer meets the conditions for reduced reporting in 9VAC25-31-840 E, the POTW must immediately begin sampling and inspecting the industrial user at least once a year.

f. Evaluate whether each such significant industrial user needs a plan or other action to control slug discharges. For industrial users identified as significant prior to November 14, 2005, this evaluation must have been conducted at least once by October 14, 2005; additional significant industrial users must be evaluated within one year of being designated a significant industrial user. For purposes of this subsection, a slug discharge is any discharge of a nonroutine, episodic nature, including an accidental spill or noncustomary batch discharge that has a reasonable potential to cause interference or pass through, or in any other way violate the POTWs regulating local limits or permit conditions. The results of such activities shall be available to the department upon request. Significant industrial users are required to notify the POTW immediately of any changes at its facility affecting potential for a slug discharge. If the POTW decides that a slug control plan is needed, the plan shall contain, at a minimum, the following elements:

(1) Description of discharge practices, including nonroutine batch discharges;

(2) Description of stored chemicals;

(3) Procedures for immediately notifying the POTW of slug discharges, including any discharge that would violate a prohibition under 9VAC25-31-770 B, with procedures for follow-up written notification within five days; and

(4) If necessary, procedures to prevent adverse impact from accidental spills, including inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of plant site run-off, worker training, building of containment structures or equipment, measures for containing toxic organic pollutants (including solvents), and measures and equipment necessary for emergency response.

g. Investigate instances of noncompliance with pretreatment standards and requirements, as indicated in the reports and notices required under 9VAC25-31-840, or indicated by analysis, inspection, and surveillance activities described in subdivision 2 e of this subsection. Sample taking and analysis and the collection of other information shall be performed with sufficient care to produce evidence admissible in enforcement proceedings or in judicial actions.

h. Comply with the public participation requirements of the Code of Virginia and 40 CFR Part 25 in the enforcement of national pretreatment standards. These procedures shall include provisions for at least annual public notification, in a newspaper of general circulation that provides meaningful public notice within the jurisdiction served by the POTW of industrial users which, at any time during the previous 12 months were in significant noncompliance with applicable pretreatment requirements. For the purposes of this provision, a significant industrial user (or any industrial user that violates subdivision 2 h (3), (4) or (8) of this subsection is in significant noncompliance if its violation meets one or more of the following criteria:

(1) Chronic violations of wastewater discharge limits, defined here as those in which 66% or more of all of the measurements taken during a six-month period exceed (by any magnitude) a numeric pretreatment standard or requirement, including instantaneous limits, as defined by 9VAC25-31-10;

(2) Technical Review Criteria (TRC) violations, defined here as those in which 33% or more of all of the measurements for each pollutant parameter taken during a six-month period equal or exceed the product of the numeric pretreatment standard or requirement, including instantaneous limits, as defined by 9VAC25-31-10; multiplied by the applicable TRC (TRC = 1.4 for BOD, TSS, fats, oil, and grease, and 1.2 for all other pollutants except pH);

(3) Any other violation of a pretreatment standard or requirement as defined by 9VAC25-31-10 (daily maximum, long-term average, instantaneous limit, or narrative standard) that the control authority POTW determines has caused, alone or in combination with other discharges, interference or pass through (including endangering the health of POTW personnel or the general public);

(4) Any discharge of a pollutant that has caused imminent endangerment to human health, welfare or to the environment or has resulted in the POTW's exercise of its emergency authority under subdivision 1 f of this subsection to halt or prevent such a discharge;

(5) Failure to meet, within 90 days after the schedule date, a compliance schedule milestone contained in a local control mechanism or enforcement order for starting construction, completing construction, or attaining final compliance;

(6) Failure to provide, within 45 days after the due date, required reports such as baseline monitoring reports, 90-day compliance reports, periodic self-monitoring reports, and reports on compliance with compliance schedules;

(7) Failure to accurately report noncompliance; or

(8) Any other violation or group of violations that may include a violation of Best Management Practices which the POTW determines will adversely affect the operation or implementation of the local pretreatment program.

3. Funding. The POTW shall have sufficient resources and qualified personnel to carry out the authorities and procedures described in subdivisions 1 and 2 of this subsection. In some limited circumstances, funding and personnel may be delayed where (i) the POTW has adequate legal authority and procedures to carry out the pretreatment program requirements described in this section, and (ii) a limited aspect of the program does not need to be implemented immediately (see 9VAC25-31-810 B).

4. Local limits. The POTW shall develop local limits as required in 9VAC25-31-770 C 1, using current influent, effluent and sludge data, or demonstrate that they are not necessary.

5. The POTW shall develop and implement an enforcement response plan. This plan shall contain detailed procedures indicating how a POTW will investigate and respond to instances of industrial user noncompliance. The plan shall, at a minimum:

a. Describe how the POTW will investigate instances of noncompliance;

b. Describe the types of escalating enforcement responses the POTW will take in response to all anticipated types of industrial user violations and the time periods within which responses will take place;

c. Identify (by title) the official or officials responsible for each type of response; and

d. Adequately reflect the POTW's primary responsibility to enforce all applicable pretreatment requirements and standards, as detailed in subdivisions 1 and 2 of this subsection.

6. The POTW shall prepare and maintain a list of its significant industrial users. The list shall identify the criteria in the definition of significant industrial user in Part I (9VAC25-31-10 et seq.) of this chapter which are applicable to each industrial user and, where applicable, shall also indicate whether the POTW has made a determination pursuant to subdivision 3 of that definition that such industrial user should not be considered a significant industrial user. This list shall be submitted to the department pursuant to 9VAC25-31-810 as a nonsubstantial program modification pursuant to 9VAC25-31-900 D. Modifications to the list shall be submitted to the department pursuant to 9VAC25-31-840 I 1.

G. A POTW that chooses to receive electronic documents must satisfy the requirements of 40 CFR Part 3 (electronic reporting).

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 14, Issue 9, eff. March 1, 1998; Errata, 14:12 VA.R. 1937 March 2, 1998; Errata, 14:17 VA.R. 2477 May 11, 1998; amended, Virginia Register Volume 16, Issue 25, eff. September 27, 2000; Volume 18, Issue 9, eff. February 15, 2002; Volume 22, Issue 24, eff. September 6, 2006; Volume 28, Issue 10, eff. February 15, 2012; Volume 37, Issue 1, eff. October 1, 2020.

9VAC25-31-805. Pretreatment requirements for testing for PFAS chemicals.

A. As used in this section, "PFAS chemical" means (i) perfluorooctanoic acid (PFOA), (ii) perfluorooctane sulfonate (PFOS), (iii) hexafluoropropylene oxide dimer acid (HFPO-DA), (iv) perfluorobutane sulfonate (PFBS), or (v) any substance in a class of fluorinated organic chemicals containing at least two adjacent fluorinated carbon atoms, where one carbon atom is fully fluorinated and the other atom is at least partially fluorinated, excluding gases and volatile liquids, also referred to as perfluoroalkyl and polyfluoroalkyl substances, identified by a publicly owned treatment works in its pretreatment program for which there is a U.S. Environmental Protection Agency approved testing method.

B. Any publicly owned treatment works receiving a wastestream from an industrial user that receives and cleans, repairs, refurbishes, or processes any equipment, parts, or media used to treat any water or wastewater from any off-site manufacturing process that the industrial user knows or reasonably should know uses PFAS chemicals shall require such industrial user to test its wastestream for PFAS chemicals prior to and after cleaning, repairing, refurbishing, or processing such items. The results of such tests shall be transmitted to the receiving POTW within three days of receipt of the test results by the industrial user of the POTW.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 40, Issue 4, eff. November 8, 2023; Errata, 40:5 VA.R. 336 October 23, 2023.

Article 4
Pathogens and Vector Attraction Reduction

9VAC25-31-810. POTW pretreatment programs and/or authorization to revise pretreatment standards: submission for app.

A. A POTW requesting approval of a POTW pretreatment program shall develop a program description which includes the information set forth in subdivisions B 1 through B 4 of this section. This description shall be submitted to the department which will make a determination on the request for program approval in accordance with the procedures described in 9VAC25-31-830.

B. The program description must contain the following information:

1. A statement from the city solicitor or a city official acting in a comparable capacity (or the attorney for those POTWs which have independent legal counsel) that the POTW has authority adequate to carry out the programs described in 9VAC25-31-800. This statement shall:

a. Identify the provision of the legal authority under 9VAC25-31-800 F 1 which provides the basis for each procedure under 9VAC25-31-800 F 2;

b. Identify the manner in which the POTW will implement the program requirements set forth in 9VAC25-31-800, including the means by which pretreatment standards will be applied to individual industrial users (e.g., by order, permit, ordinance, etc.); and

c. Identify how the POTW intends to ensure compliance with pretreatment standards and requirements, and to enforce them in the event of noncompliance by industrial users;

2. A copy of any statutes, ordinances, regulations, agreements, or other authorities relied upon by the POTW for its administration of the program which meet the requirements of 9VAC25-31-800 F 1. This submission shall include a statement reflecting the endorsement or approval of the local boards or bodies responsible for supervising or funding the POTW pretreatment program if approved;

3. A brief description (including organization charts) of the POTW organization which will administer the pretreatment program. If more than one agency is responsible for administration of the program the responsible agencies shall be identified, their respective responsibilities delineated, and their procedures for coordination set forth in an inter-jurisdictional agreement; and

4. A description of the funding levels and full and part-time manpower available to implement the program.

C. The POTW may request conditional approval of the pretreatment program pending the acquisition of funding and personnel from certain elements of the program. The request for conditional approval must meet the requirements set forth in subsection B of this section except that the requirements of subsection B of this section may be relaxed if the submission demonstrates that:

1. A limited aspect of the program does not need to be implemented immediately;

2. The POTW had adequate legal authority and procedures to carry out those aspects of the program which will not be implemented immediately; and

3. Funding and personnel for the program aspects to be implemented at a later date will be available when needed. The POTW will describe in the submission the mechanism by which this funding will be acquired. Upon receipt of a request for conditional approval, the director will establish a fixed date for the acquisition of the needed funding and personnel. If funding is not acquired by this date, the conditional approval of the POTW pretreatment program and any removal allowances granted to the POTW may be modified or withdrawn.

D. The request for authority to revise categorical pretreatment standards must contain the information required in 9VAC25-31-790 D.

E. Any POTW requesting POTW pretreatment program approval shall submit to the department three copies of the submission described in subsection B, and if appropriate, subsection D of this section. Within 60 days after receiving the submission, the director shall make a preliminary determination of whether the submission meets the requirements of subsection B and, if appropriate, subsection D of this section. If the director makes the preliminary determination that the submission meets these requirements, the director shall:

1. Notify the POTW that the submission has been received and is under review; and

2. Commence the public notice and evaluation activities set forth in 9VAC25-31-830.

F. If, after review of the submission as provided for in subsection E of this section, the director determines that the submission does not comply with the requirements of subsections B or C of this section, and, if appropriate, subsection D, of this section, the director shall provide notice in writing to the applying POTW and each person who has requested individual notice. This notification shall identify any defects in the submission and advise the POTW and each person who has requested individual notice of the means by which the POTW can comply with the applicable requirements of subsections B, C of this section, and, if appropriate, subsection D of this section.

G. Consistency with water quality management plans.

1. In order to be approved the POTW pretreatment program shall be consistent with any approved water quality management plan developed in accordance with 40 CFR Parts 130 and 131, as revised, where such 208 plan includes management agency designations and addresses pretreatment in a manner consistent with this part. In order to assure such consistency the director shall solicit the review and comment of the appropriate 208 planning agency during the public comment period provided for in 9VAC25-31-830 B 1 b prior to approval or disapproval of the program.

2. Where no 208 plan has been approved or where a plan has been approved but lacks management agency designations or does not address pretreatment in a manner consistent with this part, the director shall nevertheless solicit the review and comment of the appropriate 208 planning agency.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 16, Issue 25, eff. September 27, 2000; Volume 18, Issue 9, eff. February 15, 2002; Volume 28, Issue 10, eff. February 15, 2012.

9VAC25-31-820. [Reserved]. (Reserved)

9VAC25-31-830. Approval procedures for POTW pretreatment programs and POTW granting of removal credits.

The following procedures shall be adopted in approving or denying requests for approval of POTW pretreatment programs and applications for removal credit authorization:

A. The director shall have 90 days from the date of public notice of any submission complying with the requirements of 9VAC25-31-810 B and, where removal credit authorization is sought with 9VAC25-31-790 E and 9VAC25-31-810 D, to review the submission. The director shall review the submission to determine compliance with the requirements of 9VAC25-31-800 B and F, and, where removal credit authorization is sought, with 9VAC25-31-790. The director may have up to an additional 90 days to complete the evaluation of the submission if the public comment period provided for in subdivision B 1 b of this section is extended beyond 30 days or if a public hearing is held as provided for in subdivision B 2 of this section. In no event, however, shall the time for evaluation of the submission exceed a total of 180 days from the date of public notice of a submission meeting the requirements of 9VAC25-31-810 B and, in the case of a removal credit application, 9VAC25-31-790 E and 9VAC25-31-810 B.

B. Upon receipt of a submission, the director shall commence its review. Within 20 work days after making a determination that a submission meets the requirements of 9VAC25-31-810 B and, where removal allowance approval is sought, 9VAC25-31-790 D and 9VAC25-31-810 D, the director shall:

1. Issue a public notice of request for approval of the submission.

a. This public notice shall be circulated in a manner designed to inform interested and potentially interested persons of the submission. Procedures for the circulation of public notice shall include:

(1) Mailing, by electronic or postal delivery, notices of the request for approval of the submission to designated CWA § 208 planning agencies, federal and state fish, shellfish, and wildlife resource agencies (unless such agencies have asked not to be sent the notices); and to any other person or group who has requested individual notice, including those on appropriate mailing lists; and

(2) Publication of a notice of request for approval of the submission in a newspaper(s) of general circulation within the jurisdiction(s) served by the POTW that provides meaningful public notice.

b. The public notice shall provide a period of not less than 30 days following the date of the public notice during which time interested persons may submit their written views on the submission.

c. All written comments submitted during the 30-day comment period shall be retained by the director and considered in the decision on whether or not to approve the submission. The period for comment may be extended at the discretion of the director.

2. Provide an opportunity for the applicant, any affected state, any interested state or federal agency, person or group of persons to request a public hearing with respect to the submission.

a. This request for public hearing shall be filed within the 30-day (or extended) comment period described in subdivision 1 b of this subsection and shall indicate the interest of the person filing such request and the reasons why a public hearing is warranted.

b. The director shall hold a public hearing if the POTW so requests. In addition, a public hearing will be held if there is a significant public interest in issues relating to whether or not the submission should be approved. Instances of doubt should be resolved in favor of holding the public hearing.

c. Public notice of a public hearing to consider a submission and sufficient to inform interested parties of the nature of the public hearing and the right to participate shall be published in the same newspaper(s) as the notice of the original request for approval of the submission under subdivision 1 a (2) of this subsection. In addition, notice of the public hearing shall be sent to those persons requesting individual notice.

C. At the end of the 30-day (or extended) comment period and within the 90-day (or extended) period provided for in subsection A of this section, the director shall approve or deny the submission based upon the evaluation in subsection A of this section and taking into consideration comments submitted during the comment period and the record of the public hearing, if held. Where the director makes a determination to deny the request, the director shall so notify the POTW and each person who has requested individual notice. This notification shall include suggested modifications and the director may allow the requestor additional time to bring the submission into compliance with applicable requirements.

D. No POTW pretreatment program or authorization to grant removal allowances shall be approved by the director if following the 30-day (or extended) evaluation period provided for in subdivision B 1 b of this section and any public hearing held pursuant to subdivision B 2 of this section, the regional administrator sets forth in writing objections to the approval of such submission and the reasons for such objections. A copy of the regional administrator's objections shall be provided to the applicant and each person who has requested individual notice. The regional administrator shall provide an opportunity for written comments and may convene a public hearing on his objections. Unless retracted, the regional administrator's objections shall constitute a final ruling to deny approval of a POTW pretreatment program or authorization to grant removal allowances 90 days after the date the objections are issued.

E. The director shall notify those persons who submitted comments and participated in the public hearing, if held, of the approval or disapproval of the submission. In addition, the director shall cause to be published a notice of approval or disapproval in the same newspapers as the original notice of request for approval of the submission was published. The director shall identify in any notice of POTW pretreatment program approval any authorization to modify categorical pretreatment standards which the POTW may make, in accordance with 9VAC25-31-790, for removal of pollutants subject to pretreatment standards.

F. The director shall ensure that the submission and any comments upon such submission are available to the public for inspection and copying.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 14, Issue 9, eff. March 1, 1998; Volume 29, Issue 24, eff. September 1, 2013.

9VAC25-31-840. Reporting requirements for POTWs and industrial users.

A. (Reserved.)

B. Reporting requirements for industrial users upon effective date of categorical pretreatment standard baseline report. Within 180 days after the effective date of a categorical pretreatment standard, or 180 days after the final administrative decision made upon a category determination submission under 9VAC25-31-780 A 4, whichever is later, existing industrial users subject to such categorical pretreatment standards and currently discharging to or scheduled to discharge to a POTW shall be required to submit to the control authority a report which contains the information listed in subdivisions 1 through 7 of this subsection. At least 90 days prior to commencement of discharge, new sources and sources that become industrial users subsequent to the promulgation of an applicable categorical standard shall be required to submit to the control authority a report which contains the information listed in subdivisions 1 through 5 of this subsection. New sources shall also be required to include in this report information on the method of pretreatment the source intends to use to meet applicable pretreatment standards. New sources shall give estimates of the information requested in subdivisions 4 and 5 of this subsection.

1. Identifying information. The user shall submit the name and address of the facility including the name of the operator and owners.

2. Permits. The user shall submit a list of any environmental control permits held by or for the facility.

3. Description of operations. The user shall submit a brief description of the nature, average rate of production, and standard industrial classification of the operation or operations carried out by such industrial user. This description should include a schematic process diagram which indicates points of discharge to the POTW from the regulated processes.

4. Flow measurement. The user shall submit information showing the measured average daily and maximum daily flow, in gallons per day, to the POTW from each of the following:

a. Regulated process streams; and

b. Other streams as necessary to allow use of the combined wastestream formula of 9VAC25-31-780 E. (See subdivision 5 d of this subsection.)

The control authority may allow for verifiable estimates of these flows where justified by cost or feasibility considerations.

5. Measurement of pollutants.

a. The user shall identify the pretreatment standards applicable to each regulated process;

b. In addition, the user shall submit the results of sampling and analysis identifying the nature and concentration (or mass, where required by the standard or control authority) of regulated pollutants in the discharge from each regulated process. Both daily maximum and average concentration (or mass, where required) shall be reported. The sample shall be representative of daily operations. In cases where the standard requires compliance with a Best Management Practice or pollution prevention alternative, the user shall submit documentation as required by the control authority or the applicable standards to determine compliance with the standard;

c. The user shall take a minimum of one representative sample to compile that data necessary to comply with the requirements of this subsection;

d. Samples shall be taken immediately downstream from pretreatment facilities if such exist or immediately downstream from the regulated process if no pretreatment exists. If other wastewaters are mixed with the regulated wastewater prior to pretreatment, the user shall measure the flows and concentrations necessary to allow use of the combined wastestream formula of 9VAC25-31-780 E in order to evaluate compliance with the pretreatment standards. Where an alternate concentration or mass limit has been calculated in accordance with 9VAC25-31-780 E, this adjusted limit along with supporting data shall be submitted to the control authority;

e. Sampling and analysis shall be performed in accordance with the techniques prescribed in 40 CFR Part 136 and amendments thereto. Where 40 CFR Part 136 does not contain sampling or analytical techniques for the pollutant in question, or where the administrator determines that the Part 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analysis shall be performed by using validated analytical methods or any other applicable sampling and analytical procedures, including procedures suggested by the POTW or other parties, approved by the administrator;

f. The control authority may allow the submission of a baseline report which utilizes only historical data so long as the data provides information sufficient to determine the need for industrial pretreatment measures; and

g. The baseline report shall indicate the time, date and place of sampling, and methods of analysis, and shall certify that such sampling and analysis is representative of normal work cycles and expected pollutant discharges to the POTW.

6. Certification. A statement, reviewed by an authorized representative of the industrial user (as defined in subsection M of this section) and certified to by a qualified professional, indicating whether pretreatment standards are being met on a consistent basis, and, if not, whether additional operation and maintenance (O and M) or additional pretreatment, or both, are required for the industrial user to meet the pretreatment standards and requirements.

7. Compliance schedule. If additional pretreatment or O and M, or both, will be required to meet the pretreatment standards, the shortest schedule by which the industrial user will provide such additional pretreatment or O and M, or both. The completion date in this schedule shall not be later than the compliance date established for the applicable pretreatment standard.

a. Where the industrial user's categorical pretreatment standard has been modified by a removal allowance (9VAC25-31-790), the combined wastestream formula (9VAC25-31-780 E), or a fundamentally different factors variance (9VAC25-31-850), or any combination of them, at the time the user submits the report required by this subsection, the information required by subdivisions 6 and 7 of this subsection shall pertain to the modified limits.

b. If the categorical pretreatment standard is modified by a removal allowance (9VAC25-31-790), the combined wastestream formula (9VAC25-31-780 E), or a fundamentally different factors variance (9VAC25-31-850), or any combination of them, after the user submits the report required by this subsection, any necessary amendments to the information requested by subdivisions 6 and 7 of this subsection shall be submitted by the user to the control authority within 60 days after the modified limit is approved.

C. Compliance schedule for meeting categorical pretreatment standards. The following conditions shall apply to the schedule required by subdivision B 7 of this section:

1. The schedule shall contain increments of progress in the form of dates for the commencement and completion of major events leading to the construction and operation of additional pretreatment required for the industrial user to meet the applicable categorical pretreatment standards (e.g., hiring an engineer, completing preliminary plans, completing final plans, executing contract for major components, commencing construction, completing construction, etc.);

2. No increment referred to in subdivision 1 of this subsection shall exceed nine months; and

3. Not later than 14 days following each date in the schedule and the final date for compliance, the industrial user shall submit a progress report to the control authority including, at a minimum, whether or not it complied with the increment of progress to be met on such date and, if not, the date on which it expects to comply with this increment of progress, the reason for delay, and the steps being taken by the industrial user to return the construction to the schedule established. In no event shall more than nine months elapse between such progress reports to the control authority.

D. Report on compliance with categorical pretreatment standard deadline. Within 90 days following the date for final compliance with applicable categorical pretreatment standards or in the case of a new source following commencement of the introduction of wastewater into the POTW, any industrial user subject to pretreatment standards and requirements shall submit to the control authority a report containing the information described in subdivisions B 4 through B 6 of this section. For industrial users subject to equivalent mass or concentration limits established by the control authority in accordance with the procedures in 9VAC25-31-780 C, this report shall contain a reasonable measure of the user's long-term production rate. For all other industrial users subject to categorical pretreatment standards expressed in terms of allowable pollutant discharge per unit of production (or other measure of operation), this report shall include the user's actual production during the appropriate sampling period.

E. Periodic reports on continued compliance.

1. Any industrial user subject to a categorical pretreatment standard, after the compliance date of such pretreatment standard, or, in the case of a new source, after commencement of the discharge into the POTW, shall submit to the control authority during the months of June and December, unless required more frequently in the pretreatment standard or by the control authority or the director, a report indicating the nature and concentration of pollutants in the effluent which are limited by such categorical pretreatment standards. In addition, this report shall include a record of measured or estimated average and maximum daily flows for the reporting period for the discharge reported in subdivision B 4 of this section except that the control authority may require more detailed reporting of flows. In cases where the pretreatment standard requires compliance with a Best Management Practice (or pollution prevention alternative), the user shall submit documentation required by the control authority or the pretreatment standard necessary to determine the compliance status of the user. At the discretion of the control authority and in consideration of such factors as local high or low flow rates, holidays, budget cycles, etc., the control authority may agree to alter the months during which the above reports are to be submitted. For industrial users for which the department is the control authority, as of the start date in Table 1 of 9VAC25-31-1020, all reports submitted in compliance with this subsection shall be submitted electronically by the industrial user to the department in compliance with this subsection and 40 CFR Part 3 (including, in all cases, 40 CFR Part 3 Subpart D), 9VAC25-31-110, and Part XI (9VAC25-31-950 et seq.) of this chapter. Part XI of this chapter is not intended to undo existing requirements for electronic reporting. Prior to this date, and independent of Part XI of this chapter, the industrial users for which the department is the control authority may be required to report electronically if specified by a particular control mechanism.

2. The control authority may authorize the industrial user subject to a categorical pretreatment standard to forego sampling of a pollutant regulated by a categorical pretreatment standard if the industrial user has demonstrated through sampling and other technical factors that the pollutant is neither present nor expected to be present in the discharge, or is present only at background levels from intake water and without any increase in the pollutant due to activities of the industrial user. This authorization is subject to the following conditions:

a. The control authority may authorize a waiver where a pollutant is determined to be present solely due to sanitary wastewater discharged from the facility provided that the sanitary wastewater is not regulated by an applicable categorical standard and otherwise includes no process wastewater.

b. The monitoring waiver is valid only for the duration of the effective period of the permit or other equivalent individual control mechanism, but in no case longer than five years. The user must submit a new request for the waiver before the waiver can be granted for each subsequent control mechanism.

c. In making a demonstration that a pollutant is not present, the industrial user must provide data from at least one sampling of the facility's process wastewater prior to any treatment present at the facility that is representative of all wastewater from all processes. The request for a monitoring waiver must be signed in accordance with subsection L of this subsection, and include the certification statement in 9VAC25-31-780 A 2 b. Nondetectable sample results may only be used as a demonstration that a pollutant is not present if the EPA approved method from 40 CFR Part 136 with the lowest minimum detection level for that pollutant was used in the analysis.

d. Any grant of the monitoring waiver by the control authority must be included as a condition in the user's control mechanism. The reasons supporting the waiver and any information submitted by the user in its request for the waiver must be maintained by the control authority for three years after expiration of the waiver.

e. Upon approval of the monitoring waiver and revision of the user's control mechanism by the control authority, the industrial user must certify on each report with the statement below, that there has been no increase in the pollutant in its wastestream due to activities of the industrial user:

"Based on my inquiry of the person or persons directly responsible for managing compliance with the pretreatment standard for 40 CFR [specify applicable national pretreatment standard part(s)], I certify that, to the best of my knowledge and belief, there has been no increase in the level of [list pollutant(s)] in the wastewaters due to the activities at the facility since filing of the last periodic report under 9VAC25-31-840 E 1."

f. In the event that a waived pollutant is found to be present or is expected to be present based on changes that occur in the user's operations, the user must immediately: Comply with the monitoring requirements of subdivision 1 of this subsection or other more frequent monitoring requirements imposed by the control authority, and notify the control authority.

g. This provision does not supersede certification processes and requirements established in categorical pretreatment standards, except as otherwise specified in the categorical pretreatment standard.

3. The control authority may reduce the requirement in the subdivision 1 of this subsection to a requirement to report no less frequently than once a year, unless required more frequently in the pretreatment standard or by the approval authority, where the industrial user meets all of the following conditions:

a. The industrial user's total categorical wastewater flow does not exceed any of the following:

(1) 0.01% of the design dry weather hydraulic capacity of the POTW, or 5,000 gallons per day, whichever is smaller, as measured by a continuous effluent flow monitoring device unless the industrial user discharges in batches;

(2) 0.01% of the design dry weather organic treatment capacity of the POTW; and

(3) 0.01% of the maximum allowable headworks loading for any pollutant regulated by the applicable categorical pretreatment standard for which approved local limits were developed by a POTW in accordance with 9VAC25-31-770 C and D.

b. The industrial user has not been in significant noncompliance, as defined in 9VAC25-31-800 F 2 g, for any time in the past two years;

c. The Industrial User does not have daily flow rates, production levels, or pollutant levels that vary so significantly that decreasing the reporting requirement for this Industrial User would result in data that are not representative of conditions occurring during the reporting period pursuant to subdivision G 3 of this section;

d. The industrial user must notify the control authority immediately of any changes at its facility causing it to no longer meet conditions of subdivision 3 a or b of this subsection. Upon notification, the industrial user must immediately begin complying with the minimum reporting in subdivision 1 of this subsection; and

e. The control authority must retain documentation to support the control authority's determination that a specific industrial user qualifies for reduced reporting requirements under subdivision 3 of this subsection for a period of three years after the expiration of the term of the control mechanism.

4. Where the control authority has imposed mass limitations on industrial users as provided for by 9VAC25-31-780 C, the report required by subdivision 1 of this subsection shall indicate the mass of pollutants regulated by pretreatment standards in the discharge from the industrial user.

5. For industrial users subject to equivalent mass or concentration limits established by the control authority in accordance with the procedures in 9VAC25-31-780 C, the report required by subdivision 1 of this subsection shall contain a reasonable measure of the user's long-term production rate. For all other industrial users subject to categorical pretreatment standards expressed only in terms of allowable pollutant discharge per unit of production (or other measure of operation), the report required by subdivision 1 of this subsection shall include the user's actual average production rate for the reporting period.

F. Notice of potential problems, including slug loading. All categorical and noncategorical industrial users shall notify the POTW immediately of all discharges that could cause problems to the POTW, including any slug loadings, as defined by 9VAC25-31-770 B, by the industrial user.

G. Monitoring and analysis to demonstrate continued compliance with pretreatment standards and requirements.

1. Except in the case of nonsignificant categorical users, the reports required in subsections B, D, E, and H of this section shall contain the results of sampling and analysis of the discharge, including the flow and the nature and concentration, or production and mass where requested by the control authority, of pollutants contained therein which are limited by the applicable pretreatment standards. This sampling and analysis may be performed by the control authority in lieu of the industrial user. Where the POTW performs the required sampling and analysis in lieu of the industrial user, the user will not be required to submit the compliance certification required under subdivision B 6 and subsection D of this section. In addition, where the POTW itself collects all the information required for the report, including flow data, the industrial user will not be required to submit the report.

2. If sampling performed by an industrial user indicates a violation, the user shall notify the control authority within 24 hours of becoming aware of the violation. The user shall also repeat the sampling and analysis and submit the results of the repeat analysis to the control authority within 30 days after becoming aware of the violation. Where the control authority has performed the sampling and analysis in lieu of the industrial user, the control authority must perform the repeat sampling and analysis unless it notifies the user of the violation and requires the user to perform the repeat analysis. Resampling is not required if:

a. The control authority performs sampling at the industrial user at a frequency of at least once per month; or

b. The control authority performs sampling at the user between the time when the initial sampling was conducted and the time when the user or the control authority receives the results of this sampling.

3. The reports required in subsection E of this section must be based upon data obtained through appropriate sampling and analysis performed during the period covered by the report, which data are representative of conditions occurring during the reporting period. The control authority shall require that frequency of monitoring necessary to assess and assure compliance by industrial users with applicable pretreatment standards and requirements. Grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide, and volatile organic compounds. For all other pollutants, 24-hour composite samples must be obtained through flow-proportional composite sampling techniques, unless time-proportional composite sampling or grab sampling is authorized by the control authority. Where time-proportional composite sampling or grab sampling is authorized by the control authority, the samples must be representative of the discharge and the decision to allow the alternative sampling must be documented in the industrial user file for that facility or facilities. Using protocols (including appropriate preservation) specified in 40 CFR Part 136 and appropriate EPA guidance, multiple grab samples collected during a 24-hour period may be composited prior to the analysis as follows: for cyanide, total phenols, and sulfides the samples may be composited in the laboratory or in the field; for volatile organics and oil and grease the samples may be composited in the laboratory. Composite samples for other parameters unaffected by the compositing procedures as documented in approved EPA methodologies may be authorized by the control authority, as appropriate.

4. For sampling required in support of baseline monitoring and 90-day compliance reports required in subsections B and D of this section, a minimum of four grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide and volatile organic compounds for facilities for which historical sampling data do not exist; for facilities for which historical sampling data are available, the Control Authority may authorize a lower minimum. For the reports required by subsections E and H of this section, the control authority shall require the number of grab samples necessary to assess and assure compliance by industrial users with applicable pretreatment standards and requirements.

5. All analyses shall be performed in accordance with procedures contained in 40 CFR Part 136 and amendments thereto or with any other test procedures approved by EPA, and shall be reported to the control authority. Sampling shall be performed in accordance with EPA-approved techniques. Where 40 CFR Part 136 does not include sampling or analytical techniques for the pollutants in question, or where EPA determines that the Part 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analyses shall be performed using validated analytical methods or any other sampling and analytical procedures, including procedures suggested by the POTW or other parties, approved by EPA.

6. If an industrial user subject to the reporting requirement in subsection E or H of this section monitors any regulated pollutant at the appropriate sampling location more frequently than required by the control authority, using the procedures prescribed in subdivision 5 of this subsection, the results of this monitoring shall be included in the report.

H. Reporting requirements for industrial users not subject to categorical pretreatment standards. The control authority must require appropriate reporting from those industrial users with discharges that are not subject to categorical pretreatment standards. Significant noncategorical industrial users must submit to the control authority at least once every six months (on dates specified by the control authority) a description of the nature, concentration, and flow of the pollutants required to be reported by the control authority. In cases where a local limit requires compliance with a Best Management Practice or pollution prevention alternative, the user must submit documentation required by the control authority to determine the compliance status of the user. These reports must be based on sampling and analysis performed in the period covered by the report, and in accordance with the techniques described in 40 CFR Part 136 and amendments thereto. This sampling and analysis may be performed by the control authority in lieu of the significant noncategorical industrial user. For industrial users for which the department is the control authority, as of the start date in Table 1 of 9VAC25-31-1020, all reports submitted in compliance with this subsection shall be submitted electronically by the industrial user to the department in compliance with this subsection and 40 CFR Part 3 (including, in all cases, 40 CFR Part 3 Subpart D), 9VAC25-31-110, and Part XI (9VAC25-31-950 et seq.) of this chapter. Part XI of this chapter is not intended to undo existing requirements for electronic reporting. Prior to this date, and independent of Part XI of this chapter, the industrial users for which the department is the control authority may be required to report electronically if specified by a particular control mechanism.

I. Annual POTW reports. POTWs with approved pretreatment programs shall provide the department with a report that briefly describes the POTW's program activities, including activities of all participating agencies if more than one jurisdiction is involved in the local program. The report required by this section shall be submitted no later than one year after approval of the POTW's pretreatment program, and at least annually thereafter, and shall include, at a minimum, the following:

1. An updated list of the POTW's industrial users, including their names and addresses, or a list of deletions and additions keyed to a previously submitted list. The POTW shall provide a brief explanation of each deletion. This list shall identify which industrial users are subject to categorical pretreatment standards and specify which standards are applicable to each industrial user. The list shall indicate which industrial users are subject to local standards that are more stringent than the categorical pretreatment standards. The POTW shall also list the industrial users that are subject only to local requirements. The list must also identify industrial users subject to categorical pretreatment standards that are subject to reduced reporting requirements under subdivision E 3 of this section and identify which industrial users are nonsignificant categorical industrial users;

2. A summary of the status of industrial user compliance over the reporting period;

3. A summary of compliance and enforcement activities (including inspections) conducted by the POTW during the reporting period;

4. A summary of changes to the POTW's pretreatment program that have not been previously reported to the department;

5. Any other relevant information requested by the director;

6. Any additional applicable required data in Appendix A to 40 CFR Part 127 as adopted by reference in 9VAC25-31-1030; and

7. As of the start date in Table 1 of 9VAC25-31-1020, all annual reports submitted in compliance with this subsection shall be submitted electronically by the POTW pretreatment program to the department in compliance with this subsection and 40 CFR Part 3 (including, in all cases, 40 CFR Part 3 Subpart D), 9VAC25-31-110, and Part XI (9VAC25-31-950 et seq.) of this chapter. Part XI of this chapter is not intended to undo existing requirements for electronic reporting. Prior to this date, and independent of Part XI of this chapter, the department may also require POTW pretreatment programs to electronically submit annual reports under this section if specified by a particular permit.

J. Notification of changed discharge. All industrial users shall promptly notify the control authority (and the POTW if the POTW is not the control authority) in advance of any substantial change in the volume or character of pollutants in their discharge, including the listed or characteristic hazardous wastes for which the industrial user has submitted initial notification under the Code of Virginia and this section.

K. Compliance schedule for POTWs. The following conditions and reporting requirements shall apply to the compliance schedule for development of an approvable POTW pretreatment program required by 9VAC25-31-800:

1. The schedule shall contain increments of progress in the form of dates for the commencement and completion of major events leading to the development and implementation of a POTW pretreatment program (e.g., acquiring required authorities, developing funding mechanisms, acquiring equipment);

2. No increment referred to in subdivision 1 of this subsection shall exceed nine months; and

3. Not later than 14 days following each date in the schedule and the final date for compliance, the POTW shall submit a progress report to the department including, at a minimum, whether or not it complied with the increment of progress to be met on such date and, if not, the date on which it expects to comply with this increment of progress, the reason for delay, and the steps taken by the POTW to return to the schedule established. In no event shall more than nine months elapse between such progress reports to the department.

L. Signatory requirements for industrial user reports. The reports required by subsections B, D, and E of this section shall include the certification statement as set forth in 9VAC25-31-780 A 2 b, and shall be signed as follows:

1. By a responsible corporate officer, if the industrial user submitting the reports required by subsections B, D and E of this section is a corporation. For the purpose of this subdivision, a responsible corporate officer means (i) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy-making or decision-making functions for the corporation, or (ii) the manager of one or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiate and direct other comprehensive measures to assure long-term environmental compliance with environmental laws and regulations; can ensure that the necessary systems are established or actions taken to gather complete and accurate information for control mechanism requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures.

2. By a general partner or proprietor if the industrial user submitting the reports required by subsections B, D and E of this section is a partnership or sole proprietorship, respectively.

3. By a duly authorized representative of the individual designated in subdivision 1 or 2 of this subsection if:

a. The authorization is made in writing by the individual described in subdivision 1 or 2 of this subsection;

b. The authorization specifies either an individual or a position having responsibility for the overall operation of the facility from which the industrial discharge originates, such as the position of plant manager, operator of a well, or well field superintendent, or a position of equivalent responsibility, or having overall responsibility for environmental matters for the company; and

c. The written authorization is submitted to the control authority.

4. If an authorization under subdivision 3 of this subsection is no longer accurate because a different individual or position has responsibility for the overall operation of the facility, or overall responsibility for environmental matters for the company, a new authorization satisfying the requirements of subdivision 3 of this subsection must be submitted to the control authority prior to or together with any reports to be signed by an authorized representative.

M. Signatory requirements for POTW reports. Reports submitted to the department by the POTW in accordance with subsection I of this section must be signed by a principal executive officer, ranking elected official or other duly authorized employee. The duly authorized employee must be an individual or position having responsibility for the overall operation of the facility or the pretreatment program. This authorization must be made in writing by the principal executive officer or ranking elected official, and submitted to the approval authority prior to or together with the report being submitted.

N. Provision governing fraud and false statements. The reports and other documents required to be submitted or maintained under this section shall be subject to:

1. The provisions of 18 USC § 1001 relating to fraud and false statements;

2. The provisions of the law or § 309(c)(4) of the CWA, as amended, governing false statements, representation or certification; and

3. The provisions of § 309(c)(6) of the CWA regarding responsible corporate officers.

O. Recordkeeping requirements.

1. Any industrial user and POTW subject to the reporting requirements established in this section shall maintain records of all information resulting from any monitoring activities required by this section including documentation associated with Best Management Practices. Such records shall include for all samples:

a. The date, exact place, method, and time of sampling and the names of the person or persons taking the samples;

b. The dates analyses were performed;

c. Who performed the analyses;

d. The analytical techniques/methods used; and

e. The results of such analyses.

2. Any industrial user or POTW subject to the reporting requirements established in this section (including documentation associated with Best Management Practices) shall be required to retain for a minimum of three years any records of monitoring activities and results (whether or not such monitoring activities are required by this section) and shall make such records available for inspection and copying by the director and the regional administrator (and POTW in the case of an industrial user). This period of retention shall be extended during the course of any unresolved litigation regarding the industrial user or POTW or when requested by the director or the regional administrator.

3. Any POTW to which reports are submitted by an industrial user pursuant to subsections B, D, E, and H of this section shall retain such reports for a minimum of three years and shall make such reports available for inspection and copying by the director and the regional administrator. This period of retention shall be extended during the course of any unresolved litigation regarding the discharge of pollutants by the industrial user or the operation of the POTW pretreatment program or when requested by the director or the regional administrator.

P. 1. The industrial user shall notify the POTW, the EPA Regional Waste Management Division Director, and state hazardous waste authorities in writing of any discharge into the POTW of a substance, which, if otherwise disposed of, would be a hazardous waste under the Code of Virginia and 40 CFR Part 261. Such notification must include the name of the hazardous waste as set forth in the Code of Virginia and 40 CFR Part 261, the EPA hazardous waste number, and the type of discharge (continuous, batch, or other). If the industrial user discharges more than 100 kilograms of such waste per calendar month to the POTW, the notification shall also contain the following information to the extent such information is known and readily available to the industrial user: An identification of the hazardous constituents contained in the wastes, an estimation of the mass and concentration of such constituents in the wastestream discharged during that calendar month, and an estimation of the mass of constituents in the wastestream expected to be discharged during the following 12 months. All notifications must take place within 180 days of the effective date of this rule. Industrial users who commence discharging after the effective date of this rule shall provide the notification no later than 180 days after the discharge of the listed or characteristic hazardous waste. Any notification under this subsection need be submitted only once for each hazardous waste discharged. However, notifications of changed discharges must be submitted under subsection J of this section. The notification requirement in this section does not apply to pollutants already reported under self-monitoring requirements of subsections B, D, and E of this section.

2. Dischargers are exempt from the requirements of subdivision 1 of this subsection during a calendar month in which they discharge no more than 15 kilograms of hazardous wastes, unless the wastes are acute hazardous wastes as specified in 40 CFR 261.30(d) and 261.33(e). Discharge of more than 15 kilograms of nonacute hazardous wastes in a calendar month, or of any quantity of acute hazardous wastes as specified in 40 CFR 261.30(d) and 261.33(e), requires a one-time notification. Subsequent months during which the industrial user discharges more than such quantities of any hazardous waste do not require additional notification.

3. In the case of any new regulations under § 3001 of RCRA (42 USC § 6901 et seq.) identifying additional characteristics of hazardous waste or listing any additional substance as a hazardous waste, the industrial user must notify the POTW, the EPA Regional Waste Management Waste Division Director, and state hazardous waste authorities of the discharge of such substance within 90 days of the effective date of such regulations.

4. In the case of any notification made under this subsection, the industrial user shall certify that it has a program in place to reduce the volume and toxicity of hazardous wastes generated to the degree it has determined to be economically practical.

Q. Annual certification by nonsignificant categorical industrial users. A facility determined to be a nonsignificant categorical industrial user pursuant to 9VAC25-31-10 must annually submit the following certification statement, signed in accordance with the signatory requirements in subsection L of this section. This certification must accompany an alternative report required by the control authority:

"Based on my inquiry of the person or persons directly responsible for managing compliance with the categorical pretreatment standards under 40 CFR ____, I certify that, to the best of my knowledge and belief that during the period from __________, ________ to ________, ________ [months, days, year]:

1. The facility described as ____________________ [facility name] met the definition of a nonsignificant categorical industrial user as described in 9VAC25-31-10;

2. The facility complied with all applicable pretreatment standards and requirements during this reporting period; and

3. The facility never discharged more than 100 gallons of total categorical wastewater on any given day during this reporting period. This compliance certification is based upon the following information.

_____________"

R. The control authority that chooses to receive electronic documents must satisfy the requirements of 40 CFR Part 3 (Electronic reporting).

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 14, Issue 9, eff. March 1, 1998; Errata, 14:12 VA.R. 1937 March 2, 1998; amended, Virginia Register Volume 16, Issue 25, eff. September 27, 2000; Volume 18, Issue 9, eff. February 15, 2002; Volume 22, Issue 24, eff. September 6, 2006; Volume 28, Issue 10, eff. February 15, 2012; Volume 33, Issue 22, eff. July 26, 2017.

9VAC25-31-850. Variances from categorical pretreatment standards for fundamentally different factors.

A. The term "requester" means an industrial user or a POTW or other interested person seeking a variance from the limits specified in a categorical pretreatment standard.

B. Any interested person believing that factors relating to an industrial user are fundamentally different from the factors considered during development of a categorical pretreatment standard applicable to that user and further, that the existence of those factors justifies a different discharge limit than specified in the applicable categorical pretreatment standard, may request a fundamentally different factors variance under this section.

C. Criteria.

1. General criteria. A request for a variance based upon fundamentally different factors shall be approved only if:

a. There is an applicable categorical pretreatment standard which specifically controls the pollutant for which alternative limits have been requested;

b. Factors relating to the discharge controlled by the categorical pretreatment standard are fundamentally different from the factors considered by EPA in establishing the standards; and

c. The request for a variance is made in accordance with the procedural requirements in subsections G and H of this section.

2. Criteria applicable to less stringent limits. A variance request for the establishment of limits less stringent than required by the standard shall be approved only if:

a. The alternative limit requested is no less stringent than justified by the fundamental difference;

b. The alternative limit will not result in a violation of prohibitive discharge standards prescribed by or established under 9VAC25-31-770;

c. The alternative limit will not result in a nonwater quality environmental impact (including energy requirements) fundamentally more adverse than the impact considered during development of the pretreatment standards; and

d. Compliance with the standards (either by using the technologies upon which the standards are based or by using other control alternatives) would result in either:

(1) A removal cost (adjusted for inflation) wholly out of proportion to the removal cost considered during development of the standards; or

(2) A nonwater quality environmental impact (including energy requirements) fundamentally more adverse than the impact considered during development of the standards.

3. Criteria applicable to more stringent limits. A variance request for the establishment of limits more stringent than required by the standards shall be approved only if:

a. The alternative limit request is no more stringent than justified by the fundamental difference; and

b. Compliance with the alternative limit would not result in either:

(1) A removal cost (adjusted for inflation) wholly out of proportion to the removal cost considered during development of the standards; or

(2) A nonwater quality environmental impact (including energy requirements) fundamentally more adverse than the impact considered during development of the standards.

D. Factors considered fundamentally different. Factors which may be considered fundamentally different are:

1. The nature or quality of pollutants contained in the raw waste load of the user's process wastewater;

2. The volume of the user's process wastewater and effluent discharged;

3. Nonwater quality environmental impact of control and treatment of the user's raw waste load;

4. Energy requirements of the application of control and treatment technology;

5. Age, size, land availability, and configuration as they relate to the user's equipment or facilities; processes employed; process changes; and engineering aspects of the application of control technology; and

6. Cost of compliance with required control technology.

E. Factors which will not be considered fundamentally different. A variance request or portion of such a request under this section may not be granted on any of the following grounds:

1. The feasibility of installing the required waste treatment equipment within the time the CWA allows;

2. The assertion that the standards cannot be achieved with the appropriate waste treatment facilities installed, if such assertion is not based on factors listed in subsection D of this section;

3. The user's ability to pay for the required waste treatment; or

4. The impact of a discharge on the quality of the POTW's receiving waters.

F. Local law. Nothing in this section shall be construed to impair the right of any locality under the Code of Virginia or § 510 of the CWA to impose more stringent limitations than required by federal law.

G. Application deadline.

1. Requests for a variance and supporting information must be submitted in writing to the department or to the administrator, as appropriate.

2. In order to be considered, a request for a variance must be submitted no later than 180 days after the date on which a categorical pretreatment standard is published in the Federal Register.

3. Where the user has requested a categorical determination pursuant to 9VAC25-31-780 A, the user may elect to await the results of the category determination before submitting a variance request under this section. Where the user so elects, he must submit the variance request within 30 days after a final decision has been made on the categorical determination pursuant to 9VAC25-31-780 A 4.

H. Contents submission. Written submissions for variance requests, whether made to the administrator or the department, must include:

1. The name and address of the person making the request;

2. Identification of the interest of the requester which is affected by the categorical pretreatment standard for which the variance is requested;

3. Identification of the POTW currently receiving the waste from the industrial user for which alternative discharge limits are requested;

4. Identification of the categorical pretreatment standards which are applicable to the industrial user;

5. A list of each pollutant or pollutant parameter for which an alternative discharge limit is sought;

6. The alternative discharge limits proposed by the requester for each pollutant or pollutant parameter identified in subdivision 5 of this subsection;

7. A description of the industrial user "s existing water pollution control facilities;

8. A schematic flow representation of the industrial user's water system including water supply, process wastewater systems, and points of discharge; and

9. A statement of facts clearly establishing why the variance request should be approved, including detailed support data, documentation, and evidence necessary to fully evaluate the merits of the request, e.g., technical and economic data collected by the EPA and used in developing each pollutant discharge limit in the pretreatment standard.

I. Deficient requests. The administrator or the director will only act on written requests for variances that contain all of the information required. Persons who have made incomplete submissions will be notified by the administrator or the director that their requests are deficient and unless the time period is extended, will be given up to 30 days to remedy the deficiency. If the deficiency is not corrected within the time period allowed by the administrator or the director, the request for a variance shall be denied.

J. Public notice. Upon receipt of a complete request, the administrator or the director will provide notice of receipt, opportunity to review the submission, and opportunity to comment.

1. The public notice shall be circulated in a manner designed to inform interested and potentially interested persons of the request. Procedures for the circulation of public notice shall include mailing, by electronic or postal delivery, notices to:

a. The POTW into which the industrial user requesting the variance discharges;

b. Adjoining states whose waters may be affected; and

c. Designated 208 planning agencies, federal and state fish, shellfish and wildlife resource agencies; and to any other person or group who has requested individual notice, including those on appropriate mailing lists.

2. The public notice shall provide for a period not less than 30 days following the date of the public notice during which time interested persons may review the request and submit their written views on the request.

3. Following the comment period, the administrator or the director will make a determination on the request taking into consideration any comments received. Notice of this final decision shall be provided to the requester (and the industrial user for which the variance is requested if different), the POTW into which the industrial user discharges and all persons who submitted comments on the request.

K. Review of requests.

1. Where the director finds that fundamentally different factors do not exist, he may deny the request and notify the requester (and industrial user where they are not the same) and the POTW of the denial.

2. Where the director finds that fundamentally different factors do exist, he shall forward the request, with a recommendation that the request be approved, to the administrator.

Statutory Authority

§§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 29, Issue 24, eff. September 1, 2013.

9VAC25-31-860. Confidentiality.

Any information submitted to the department pursuant to this part may be claimed as secret formulae, secret processes or secret methods, other than effluent data, by the submitter. Any such claim will be considered under the conditions of 9VAC25-31-80.

Statutory Authority

§§ 62.1-44.15, 62.1-44.16, 62.1-44.17, 62.1-44.18, and 62.1-44.19 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996.

9VAC25-31-870. Net/gross calculation.

A. Application. Categorical pretreatment standards may be adjusted to reflect the presence of pollutants in the industrial user's intake water in accordance with this section. Any industrial user wishing to obtain credit for intake pollutants must make application to the control authority. Upon request of the industrial user, the applicable standard will be calculated on a "net" basis (i.e., adjusted to reflect credit for pollutants in the intake water) if the requirements of subsection B of this section are met.

B. Criteria.

1. Either

a. The applicable categorical pretreatment standards contained in 40 CFR subchapter N specifically provide that they shall be applied on a net basis; or

b. The industrial user demonstrates that the control system it proposes or uses to meet applicable categorical pretreatment standards would, if properly installed and operated, meet the standards in the absence of pollutants in the intake waters.

2. Credit for generic pollutants such as biochemical oxygen demand (BOD), total suspended solids (TSS), and oil and grease should not be granted unless the industrial user demonstrates that the constituents of the generic measure in the user's effluent are substantially similar to the constituents of the generic measure in the intake water or unless appropriate additional limits are placed on process water pollutants either at the outfall or elsewhere.

3. Credit shall be granted only to the extent necessary to meet the applicable categorical pretreatment standards or standards, up to a maximum value equal to the influent value. Additional monitoring may be necessary to determine eligibility for credits and compliance with standards adjusted under this section.

4. Credit shall be granted only if the user demonstrates that the intake water is drawn from the same body of water as that into which the POTW discharges. The control authority may waive this requirement if it finds that no environmental degradation will result.

Statutory Authority

§ 62.1-44.15 (10) of the Code of Virginia; § 402 of the Clean Water Act, 40 CFR Parts 122, 123, 124, 403 and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 22, Issue 24, eff. September 6, 2006.

9VAC25-31-880. Upset provision.

A. For the purposes of this section, "upset" means an exceptional incident in which there is unintentional and temporary noncompliance with categorical pretreatment standards because of factors beyond the reasonable control of the industrial user. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.

B. An upset shall constitute an affirmative defense to an action brought for noncompliance with categorical pretreatment standards if the requirements of subsection C of this section are met.

C. An industrial user who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs, or other relevant evidence that:

1. An upset occurred and the industrial user can identify the cause or causes of the upset;

2. The facility was at the time being operated in a prudent and workmanlike manner and in compliance with applicable operation and maintenance procedures; and

3. The industrial user has submitted the following information to the POTW and control authority within 24 hours of becoming aware of the upset (if this information is provided orally, a written submission must be provided within five days):

a. A description of the indirect discharge and cause of noncompliance;

b. The period of noncompliance, including exact dates and times or, if not corrected, the anticipated time the noncompliance is expected to continue; and

c. Steps being taken or planned, or both, to reduce, eliminate and prevent recurrence of the noncompliance.

D. In any enforcement proceeding the industrial user seeking to establish the occurrence of an upset shall have the burden of proof.

E. In the usual exercise of prosecutorial discretion, the director should review any claims that noncompliance was caused by an upset. No determinations made in the course of the review constitute final director action subject to judicial review. Industrial users will have the opportunity for a judicial determination on any claim of upset only in an enforcement action brought for noncompliance with categorical pretreatment standards.

F. The industrial user shall control production or all discharges to the extent necessary to maintain compliance with categorical pretreatment standards upon reduction, loss, or failure of its treatment facility until the facility is restored or an alternative method of treatment is provided. This requirement applies in the situation where, among other things, the primary source of power of the treatment facility is reduced, lost or fails.

Statutory Authority

§§ 62.1-44.15, 62.1-44.16, 62.1-44.17, 62.1-44.18, and 62.1-44.19 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996.

9VAC25-31-890. Bypass.

A. Definitions. For the purpose of this section:

1. "Bypass" means the intentional diversion of wastestreams from any portion of an industrial user "s treatment facility.

2. "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.

B. Bypass not violating applicable pretreatment standards or requirements. An industrial user may allow any bypass to occur which does not cause pretreatment standards or requirements to be violated, but only if it also is for essential maintenance to assure efficient operation. These bypasses are not subject to the provision of subsections C and D of this section.

C. Notice.

1. If an industrial user knows in advance of the need for a bypass, it shall submit prior notice to the control authority, if possible at least 10 days before the date of the bypass.

2. An industrial user shall submit oral notice of an unanticipated bypass that exceeds applicable pretreatment standards to the control authority within 24 hours from the time the industrial user becomes aware of the bypass. A written submission shall also be provided within five days of the time the industrial user becomes aware of the bypass. The written submission shall contain a description of the bypass and its cause; the duration of the bypass, including exact dates and times, and, if the bypass has not been corrected, the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the bypass. The control authority may waive the written report on a case-by-case basis if the oral report has been received within 24 hours.

D. Prohibition of bypass.

1. Bypass is prohibited, and the control authority may take enforcement action against an industrial user for a bypass, unless;

a. Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage;

b. There were no feasible alternatives to the 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 back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass which occurred during normal periods of equipment downtime or preventative maintenance; and

c. The industrial user submitted notices as required under subsection C of this section.

2. The control authority may approve an anticipated bypass, after considering its adverse effects, if the control authority determines that it will meet the three conditions listed in subdivision 1 of this subsection.

Statutory Authority

§§ 62.1-44.15, 62.1-44.16, 62.1-44.17, 62.1-44.18, and 62.1-44.19 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996.

9VAC25-31-900. Modification of POTW pretreatment programs.

A. Either the director or a POTW with an approved POTW pretreatment program may initiate program modification at any time to reflect changing conditions at the POTW. Program modification is necessary whenever there is a significant change in the operation of a POTW pretreatment program that differs from the information in the POTW's submission, as approved under 9VAC25-31-830.

B. Substantial modifications defined. Substantial modifications include:

1. Modifications that relax POTW legal authorities (as described in 9VAC25-31-800 F 1, except for modifications that directly reflect a revision to this part or to 40 CFR Chapter I, Subchapter N, and are reported pursuant to subsection D of this section;

2. Modifications that relax local limits, except for the modifications to local limits for pH and reallocations of the maximum allowable industrial loading of a pollutant that do not increase the total industrial loadings for the pollutant, which are reported pursuant to subsection D of this section. Maximum allowable industrial loading means the total mass of a pollutant that all industrial users of a POTW (or a subgroup of industrial users identified by the POTW) may discharge pursuant to limits developed under 9VAC25-31-770 C;

3. Changes to the POTW's control mechanism as described in 9VAC25-31-800 F 1 c;

4. A decrease in the frequency of self-monitoring or reporting required of industrial users;

5. A decrease in the frequency of industrial user inspections or sampling by the POTW;

6. Changes to the POTW's confidentiality procedures; and

7. Other modifications designated as substantial modifications by the director on the basis that the modification could have a significant impact on the operation of the POTW's pretreatment program, could result in an increase in pollutant loadings at the POTW, or could result in less stringent requirements being imposed on industrial users of the POTW.

C. Approval procedures for substantial modifications.

1. The POTW shall submit to the department a statement of the basis for the desired program modification, a modified program description (see 9VAC25-31-810 B), or such other documents the director determines to be necessary under the circumstances.

2. The director shall approve or disapprove the modification based on the requirements of 9VAC25-31-800 F and using the procedures in 9VAC25-31-830 B through F, except as provided in subdivisions C 3 and C 4 of this section. The modification shall become effective upon approval by the director.

3. The director need not publish a notice of decision under 9VAC25-31-830 E provided (i) the notice of request for approval under 9VAC25-31-830 B 1 states that the request will be approved if no comments are received by a date specified in the notice; (ii) no substantive comments are received; and (iii) the request is approved without change.

4. Notices required by 9VAC25-31-830 may be performed by the POTW provided that the director finds that the POTW notice otherwise satisfies the requirements of 9VAC25-31-830.

D. Approval procedures for nonsubstantial modifications.

1. The POTW shall notify the department of any nonsubstantial modification at least 45 days prior to implementation by the POTW in a statement similar to that provided for in subdivision C 1 of this section.

2. Within 45 days after the submission of the POTW's statement, the director shall notify the POTW of his decision to approve or disapprove the nonsubstantial modification.

3. If the director does not notify the POTW within 45 days of his decision to approve or deny the modification or to treat the modification as substantial under subdivision B 7 of this section, the POTW may implement the modification.

E. Incorporation in permit. All modifications shall be incorporated into the POTW's VPDES permit upon approval. The permit will be modified to incorporate the approved modification in accordance with 9VAC25-31-400.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996; amended, Virginia Register Volume 14, Issue 9, eff. March 1, 1998; Errata, 14:17 VA.R. 2477 May 11, 1998; amended, Virginia Register Volume 18, Issue 9, eff. February 15, 2002; Volume 28, Issue 10, eff. February 15, 2012.

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