Section
General Provisions
53.01 Purpose and policy
53.02 Definitions and abbreviations
53.03 Prohibited discharge standards
53.04 National categorical pretreatment standards
53.05 Local limits
53.06 State requirements
53.07 Right of revision
53.08 Dilution
53.09 Pretreatment of wastewater
53.10 Accidental discharge; slug control plans
53.11 Hauled wastewater
Fees; Wastewater Discharge Permit Application; Reporting Requirements
53.25 Purpose
53.26 User charges
53.27 Surcharges
53.28 Pretreatment program administration charges
53.29 Wastewater dischargers
53.30 Wastewater permits
53.31 Baseline monitoring reports
53.32 Compliance schedule progress reports
53.33 Reports on compliance with categorical pretreatment standard; deadline
53.34 Periodic compliance reports
53.35 Reports of changed conditions
53.36 Potential problems; reports
53.37 Reports from unpermitted users
53.38 Notice of violation; repeat sampling and reporting
53.39 Notification of the discharge of hazardous waste
53.40 Analytical requirements
53.41 Sample collection
53.42 Timing
53.43 Record keeping
Compliance Monitoring and Other Specific Provisions
53.55 Monitoring facilities
53.56 Inspection and sampling
53.57 Search warrants
53.58 Confidential information
53.59 Administrative remedies
53.60 Annual publication of significant noncompliance
53.61 Affirmative defenses to discharge violations
Fats, Oils, and Greases
53.75 Purpose
53.76 Definitions
53.77 General requirements
53.78 Exemptions
53.79 Maintenance
53.80 Recordkeeping
53.81 Removal
53.82 Enforcement
53.99 Penalty
GENERAL PROVISIONS
(A) This chapter sets forth uniform requirements for direct and indirect contributors into the wastewater collection and treatment system for the Town of Liberty, hereafter referred to as “the town,” and enables the town to comply with all applicable state and federal laws, including the Clean Water Act (33 U.S.C. §§ 1251 et seq.) and the General Pretreatment Regulations (40 C.F.R. 403).
(B) The objectives of this chapter are:
(1) To prevent the introduction of pollutants into the municipal wastewater system which will interfere with the operation of the system or contaminate the resulting sludge;
(2) To prevent the introduction of pollutants into the municipal wastewater system which will pass through the system, inadequately treated, into any waters of the state or otherwise be incompatible with the system;
(3) To promote reuse and recycling of industrial wastewater and sludges from the municipal system;
(4) To protect both municipal personnel who may be affected by sewage, sludge and effluent in the course of their employment as well as protecting the general public;
(5) To provide for equitable distribution of the cost of operation, maintenance and improvement of the municipal wastewater system; and
(6) To ensure that the municipality complies with its NPDES or non-discharge permit conditions, sludge use and disposal requirements and any other federal or state laws to which the municipal wastewater system is subject.
(C) This chapter provides for the regulation of direct and indirect contributors to the municipal wastewater system, through the issuance of permits to certain non-domestic users and through enforcement of general requirements for the other users, authorizes monitoring and enforcement activities, requires user reporting and provides for the setting of fees for the equitable distribution of costs resulting from the program established herein.
(D) (1) This chapter shall apply to all users of the municipal wastewater system, as authorized by G.S. §§ 160A-312 and/or 153A-275.
(2) The town shall designate an Administrator of the POTW (Publicly Owned Treatment Works) and pretreatment program hereafter referred to as the POTW Director.
(E) Except as otherwise provided herein, the POTW Director shall administer, implement and enforce the provisions of this chapter.
(F) (1) Any powers granted to or imposed upon the POTW Director may be delegated by the POTW Director to other town personnel.
(2) By discharging wastewater into the municipal wastewater system, industrial users located outside the town limits agree to comply with the terms and conditions established in this chapter, as well as any permits, enforcement actions or orders issued hereunder.
(Ord. – § 1.1, passed 9-26-2005)
(A) For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
ACT or THE ACT. The Federal Water Pollution Control Act, also known as the CLEAN WATER ACT, as amended, 33 U.S.C. §§ 1251 et seq.
APPROVAL AUTHORITY. The Director of the Division Of Water Quality of the North Carolina Department of Environment and Natural Resources or his or her designee.
AUTHORIZED REPRESENTATIVE OF THE INDUSTRIAL USER.
(a) If the industrial user is a corporation:
1. The president, secretary or a vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy or decision-making functions for the corporation; or
2. The manager of 1 or more manufacturing, production or operation facilities employing more than 250 persons or having gross annual sales or expenditures exceeding $25,000,000 (in second-quarter 1980 dollars), if authority to sign documents has been assigned or delegated to the Manager in accordance with corporate procedures.
(b) If the industrial user is a partnership or sole proprietorship, an AUTHORIZED REPRESENTATIVE shall mean a general partner or the proprietor, respectively.
(c) If the industrial user is a federal, state or local government facility, an AUTHORIZED REPRESENTATIVE shall mean a director or highest official appointed or designated to oversee the operation and performance of the activities of the government facility, or their designee.
(d) The individuals described in divisions (a) through (c) above may designate another AUTHORIZED REPRESENTATIVE if the authorization is in writing, the authorization specifies the individual or position responsible for the overall operation of the facility from which the discharge originates or having overall responsibility for environmental matters for the company, and the written authorization is submitted to the town.
BIOCHEMICAL OXYGEN DEMAND (BOD). The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedures for 5 days at 20° centigrade, usually expressed as a concentration (e.g. mg/l).
BUILDING SEWER. A sewer conveying wastewater from the premises of a user to the POTW.
BYPASS. The intentional diversion of waste streams from any portion of a user's treatment facility.
CATEGORICAL STANDARDS. National Categorical Pretreatment Standards or Pretreatment Standard.
COLOR UNIT. Produced by 1 milligram per liter of platinum in the form of the chloroplatinate ion. COLOR is expressed in UNITS of the platinum-cobalt scale.
DIRECTOR. The person designated by the town to supervise the operation of the publicly owned treatment works and who is charged with certain duties and responsibilities by this chapter, or his or her duly authorized representative.
ENVIRONMENTAL PROTECTION AGENCY or EPA. The United States Environmental Protection Agency, or where appropriate the term may also be used as a designation for the Administrator or other duly authorized official of the agency.
GRAB SAMPLE. A sample which is taken from a waste stream on a 1-time basis without regard to the flow in the waste stream and over a period of time not to exceed 15 minutes.
HOLDING TANK WASTE. Any waste from holding tanks, including but not limited to the holding tanks as vessels, chemical toilets, campers, trailers, septic tanks and vacuum-pump tank trucks.
INDIRECT DISCHARGE or DISCHARGE. The discharge or the introduction from any nondomestic source regulated under § 307(b), (c) or (d) of the Act, (33 § U.S.C. 1317), into the POTW (including holding tank waste discharged into the system).
INDUSTRIAL USER or USER. Any person which is a source of indirect discharge.
INTERFERENCE. The inhibition, or disruption of the POTW treatment processes, operations or its sludge process, use or disposal, which causes or contributes to a violation of any requirement of the POTW's NPDES or non-discharge permit or prevents sewage sludge use or disposal in compliance with specified applicable state and federal statutes, regulations or permits. The term includes prevention of sewage sludge use or disposal by the POTW in accordance with § 405 of the Act, (33 U.S.C. § 1345) or any criteria, guidelines or regulations developed pursuant to the Solid Waste Disposal Act (SWDA)(42 U.S.C. §§ 6901 et seq.), the Clean Air Act, being 42 U.S.C. §§ 7401 et seq., the Toxic Substances Control Act, being 15U.S.C. §§ 2601 et seq., the Marine Protection Research and Sanctuary Act (MPRSA), being 16 U.S.C. §§ 1431 et seq. and 33 U.S.C. §§ 1401 et seq., or more stringent state criteria (including those contained in any state sludge management plan prepared pursuant to Title IV of SWDA, being 42 U.S.C. §§ 6941 et seq.) applicable to the method of disposal or use employed by the POTW.
MEDICAL WASTE. Isolation wastes, infectious agents, human blood and blood products, pathological wastes, sharps, body parts, contaminated bedding, surgical wastes, potentially contaminated laboratory wastes and dialysis wastes.
NATIONAL CATEGORICAL PRETREATMENT STANDARD or CATEGORICAL STANDARD. Any regulation containing pollutant discharge limits promulgated by EPA in accordance with § 307(b) and (c) of the Act (33 U.S.C. § 1317) which applies to a specific category of industrial users, and which appears in 40 C.F.R. Ch. 1, Subchapter N, Parts 405-471.
NATIONAL POLLUTION DISCHARGE ELIMINATION SYSTEM or NPDES PERMIT. A permit issued pursuant to § 402 of the Act (33 U.S.C. § 1342), or pursuant to G.S. § 143-215.1 by the state under delegation from EPA.
NATIONAL PROHIBITIVE DISCHARGE STANDARD or PROHIBITIVE DISCHARGE STANDARD. Absolute prohibitions against the discharge of certain substances; these prohibitions appear in § 53.03 below and are developed under the authority of § 307(b) of the Act and 40 C.F.R. § 403.5.
NEW SOURCE.
(a) Any building, structure, facility or installation from which there may be a discharge of pollutants, the construction of which commenced after the publication of proposed categorical pretreatment standards under § 307(c) of the Act which will be applicable to the source if the standards are thereafter promulgated in accordance with § 307(c), provided that:
1. The building, structure, facility or installation is constructed at a site at which no other source is located;
2. The building, structure, facility or installation totally replaces the process or production equipment that causes the discharge of pollutants at an existing source; or
3. The production or wastewater generating processes of the building, structure, facility or installation are substantially independent of an existing source at the same site. In determining whether these are substantially independent, factors such as the extent to which the new facility is integrated with the existing plant, and the extent to which the new facility is engaged in the same general type of activity as the existing source, should be considered.
(b) Construction on a site at which an existing source is located results in a modification rather than a NEW SOURCE if the construction does not create a new building, structure, facility or installation meeting the criteria of divisions (a)2. or 3. above but otherwise alters, replaces or adds to existing process or production equipment.
(c) For purposes of this definition, construction of a NEW SOURCE has commenced if the owner or operator has:
1. Begun, or caused to begin, as part of a continuous on-site construction program:
a. Any placement, assembly or installation of facilities or equipment; or
b. Significant site preparation work including clearing, excavation or removal of existing buildings, structures or facilities which is necessary for the placement, assembly or installation of new source facilities or equipment.
2. Entered into a binding contractual obligation for the purchase of facilities or equipment which are intended to be used in its operation within a reasonable time. Options to purchase or contracts which can be terminated or modified without substantial loss, and contracts for feasibility, engineering and design studies do not constitute a contractual obligation under this definition.
NON-CONTACT COOLING WATER. Water used for cooling which does not come into direct contact with any raw material, intermediate product, waste product or finished product.
NON-DISCHARGE PERMIT. A disposal system permit issued by the state pursuant to G.S. § 143-215.1.
PASS THROUGH. A discharge which exits the POTW into waters of the state in quantities or concentrations which, alone or with discharges from other sources, causes a violation, including an increase in the magnitude or duration of a violation, of the POTW's NPDES or non-discharge permit, or a downstream water quality standard.
PERSON.
(a) Any individual, partnership, copartnership, firm, company, corporation, association, joint stock company, trust, estate, governmental entity or any other legal entity; or their legal representatives, agents or assigns.
(b) This definition includes all federal, state and local government entities.
pH. A measure of the acidity or alkalinity of a substance, expressed as standard units, and calculated as the logarithm (base 10) of the reciprocal of the concentration of hydrogen ions expressed in grams per liter of solution.
POLLUTANT. Any waste as defined in G.S. § 143-213(18) and dredged spoil, solid waste, incinerator residue, sewage, garbage, sewage sludge, munitions, medical wastes, chemical wastes, biological materials, radioactive materials, heat, wrecked or discarded equipment, rock, sand, cellar dirt and industrial, municipal and agricultural waste and certain characteristics of wastewater (e.g., pH, temperature, TSS, turbidity, color, BOD, COD, toxicity or odor).
POTW or PUBLICLY OWNED TREATMENT WORKS. A treatment works which is owned by a state, municipality, city, town, special sewer district or other publicly owned and financed entity as opposed to a privately (industrial) owned treatment facility.
POTW DIRECTOR. The Town Administrator designated with the responsibility for the pretreatment program and enforcement of this chapter.
POTW TREATMENT PLANT. That portion of the POTW designed to provide treatment to wastewater.
PRETREATMENT or TREATMENT.
(a) The reduction of the amount of pollutants, the elimination of pollutants or the alteration of the nature of pollutant properties in wastewater prior to or in lieu of discharging or otherwise introducing pollution into a POTW.
(b) The reduction or alteration can be obtained by physical, chemical or biological processes, or process changes or other means, except by diluting the concentration of the pollutants unless allowed by an applicable PRETREATMENT standard.
PRETREATMENT PROGRAM. The program for the control of pollutants introduced into the POTW from non-domestic sources which was developed by the town in compliance with 40 C.F.R. § 403.8 and approved by the approval authority as authorized by G.S. § 143-215.3(a)(14) in accordance with 40 C.F.R. § 403.11.
PRETREATMENT REQUIREMENTS. Any substantive or procedural requirement related to pretreatment, other than a pretreatment standard.
PRETREATMENT STANDARDS. Prohibited discharge standards, categorical standards and local limits.
PUBLICLY OWNED TREATMENT WORKS (POTW) or MUNICIPAL WASTEWATER SYSTEM.
(a) A treatment works as defined by § 212 of the Act, (33 U.S.C. § 1292) which is owned in this instance by the town.
(b) This includes any devices or systems used in the collection, storage, treatment, recycling and reclamation of municipal sewage or industrial wastes of a liquid nature.
(c) It also includes sewers, pipes and other conveyances only if they convey wastewater to the POTW treatment plant.
(d) For the purposes of this chapter, POTW shall also include any sewers that convey wastewaters to the POTW from persons outside the town who are, by contract or agreement with the town, or in any other way, users of the POTW of the town.
SEVERE PROPERTY DAMAGE.
(a) Substantial physical damage to property, damage to the user's 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.
(b) SEVERE PROPERTY DAMAGE does not mean economic loss caused by delays in production.
SIGNIFICANT INDUSTRIAL USER. Any industrial user of the wastewater disposal system who:
(a) Has an average daily process wastewater flow of 25,000 gallons or more;
(b) Contributes more than 5% of any design or treatment capacity (i.e., allowable pollutant load) of the wastewater treatment plant receiving the indirect discharge;
(c) Is required to meet a national categorical pretreatment standard; or
(d) Is found by the town, the Division of Water Quality or the United States Environmental Protection Agency (EPA) to have the potential for impact, either singly or in combination with other contributing industrial users, on the wastewater treatment system, the quality of sludge, the system's effluent quality or compliance with any pretreatment standards or requirements.
SIGNIFICANT NONCOMPLIANCE or REPORTABLE NONCOMPLIANCE. Status is as follows:
(a) Violations of wastewater discharge limits:
1. Chronic violations: Sixty-six percent or more of the measurements exceed (by any magnitude) the same daily maximum limit or the same average limit in a 6-month period;
2. Technical review criteria (TRC) violations: Thirty-three percent or more of the measurements equal or exceed the TRC times the limit (maximum or average) in a 6-month period. There are 2 groups of TRCs: For the conventional pollutants: BOD, TSS, fats, oil and grease TRC=1.4 For all other pollutants TRC=1.2;
3. Any other violation(s) of an effluent limit (average or daily maximum) that the control authority believes has caused, alone or in combination with other discharges, interference or pass-through; or endangered the health of the sewage treatment plant personnel or the public; and
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 to halt or prevent a like discharge.
(b) Violations of compliance schedule milestones, contained in a pretreatment permit or enforcement order, for starting construction, completing construction and attaining final compliance by 90 days or more after the schedule date;
(c) Failure to provide reports for compliance schedule, self-monitoring data, baseline monitoring reports, 90-day compliance reports and periodic compliance reports within 30 days from the due date;
(d) Failure to accurately report noncompliance; and
(e) Any other violation or group of violations that the control authority considers to be significant.
SLUG LOAD. Any discharge at a flow rate or concentration which could cause a violation of the prohibited discharge standards in § 53.03 below.
STANDARD INDUSTRIAL CLASSIFICATION (SIC). A classification pursuant to the Standard Industrial Classification Manual issued by the Executive Office of the President, Office of Management and Budget, 1987.
STORM WATER. Any flow occurring during or following any form of natural precipitation and resulting therefrom.
SUSPENDED SOLIDS. The total suspended matter that floats on the surface of, or is suspended in, water, wastewater or other liquids, and which is removable by laboratory filtering.
UPSET.
(a) An exceptional incident in which there is unintentional and temporary noncompliance with categorical pretreatment standards because of factors beyond the reasonable control of the user.
(b) 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.
WASTEWATER. The liquid and water-carried industrial or domestic wastes from dwellings, commercial buildings, industrial facilities, mobile sources, treatment facilities and institutions, together with any groundwater, surface water and storm water that may be present, whether treated or untreated, which are contributed into or permitted to enter the POTW.
WATERS OF THE STATE. All streams, lakes, ponds, marshes, watercourse, waterways, wells, springs, reservoirs, aquifers, irrigation systems, drainage systems and all other bodies or accumulations of water, surface or underground, natural or artificial, public or private, which are contained within, flow through or border upon the state or any portion thereof.
(B) Shall is mandatory; may is permissive or discretionary.
(C) The use of the singular shall be construed to include the plural and the plural shall include the singular as indicated by the context of its use.
(D) The following abbreviations when used in this chapter, shall have the designated meanings:
BOD. Biochemical oxygen demand.
C.F.R. Code of Federal Regulations.
COD. Chemical oxygen demand.
EPA. Environmental Protection Agency.
gpd. Gallons per day.
l. Liter.
mg. Milligrams.
mg/l. Milligrams per liter.
G.S. North Carolina General Statutes.
NPDES. National Pollution Discharge Elimination System.
O and M. Operation and maintenance.
POTW. Publicly Owned Treatment Works.
RCRA. Resource Conservation and Recovery Act.
SIC. Standard industrial classification.
SWDA. Solid Waste Disposal Act.
TSS. Total suspended solids.
TKN. Total kjeldahl nitrogen.
U.S.C. United States Code.
(Ord. – § 1.2, passed 9-26-2005)
(A) General prohibitions.
(1) No user shall contribute or cause to be contributed into the POTW, directly or indirectly, any pollutant or wastewater which causes interference or pass through.
(2) These general prohibitions apply to all users of a POTW whether or not the user is a significant industrial user or subject to any national, state or local pretreatment standards or requirements.
(B) Specific prohibitions. No user shall contribute or cause to be contributed into the POTW the following pollutants, substances or wastewater:
(1) Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, waste streams with a closed cup flashpoint of less than 140°F (60°C) using the test methods specified in 40 C.F.R. § 261.21;
(2) Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference but in no case solids greater than a 1/2 inch in any dimension;
(3) Petroleum oil, nonbiodegradable cutting oil or products of mineral oil origin, in amounts that will cause interference or pass through;
(4) Any wastewater having a pH less than 5.0 or more than 11.0 or wastewater having any other corrosive property capable of causing damage to the POTW or equipment;
(5) Any wastewater containing pollutants, including oxygen-demanding pollutants, (BOD and the like) in sufficient quantity, (flow or concentration) either singly or by interaction with other pollutants, to cause interference with the POTW;
(6) Any wastewater having a temperature greater than 150°F (66°C), or which will inhibit biological activity in the POTW treatment plant resulting in Interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104°F (40°C);
(7) Any 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;
(8) Any trucked or hauled pollutants, except at discharge points designated by the POTW Director in accordance with § 53.11 below;
(9) Any noxious or malodorous liquids, gases or solids or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for maintenance and repair;
(10) Any substance which may cause the POTW's effluent or any other product of the POTW such as residues, sludges or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case, shall a substance discharged to the POTW cause the POTW to be in noncompliance with sludge use or disposal regulations or permits issued under § 405 of the Act; the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act or state criteria applicable to the sludge management method being used;
(11) Any wastewater which imparts color which cannot be removed by the treatment process, including, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts sufficient color to the treatment plant's effluent to render the waters injurious to public health or secondary recreation or to aquatic life and wildlife or to adversely affect the palatability of fish or aesthetic quality or impair the receiving waters for any designated uses;
(12) Any wastewater containing any radioactive wastes or isotopes except as specifically approved by the POTW Director in compliance with applicable state or federal regulations;
(13) Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water and unpolluted industrial wastewater, unless specifically authorized by the POTW Director;
(14) Fats, oils or greases of animal or vegetable origin in concentrations exceeding limitations established under applicable federal, state or local regulations;
(15) Any sludges, screenings or other residues from the pretreatment of industrial wastes;
(16) Any medical wastes, except as specifically authorized by the POTW Director in a wastewater discharge permit;
(17) Any material containing ammonia, ammonia salts or other chelating agents which will produce metallic complexes that interfere with the municipal wastewater system;
(18) Any material that would be identified as hazardous waste according to 40 C.F.R. Part 261 if not disposed of in a sewer except as may be specifically authorized by the POTW Director;
(19) Any wastewater causing the treatment plant effluent to violate state water quality standards for toxic substances as described in 15A NCAC 2B.0200;
(20) Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test;
(21) Recognizable portions of the human or animal anatomy;
(22) Any wastes containing detergents, surface active agents or other substances which may cause excessive foaming in the municipal wastewater system; and
(23) At no time, shall 2 successive readings on an explosion hazard meter, at the point of discharge into the system (or at any point in the system) be more than 5% nor any single reading over 10% of the lower explosive limit (LEL) of the meter.
(C) Other regulations.
(1) Pollutants, substances, wastewater or other wastes prohibited by this section shall not be processed or stored in a manner so that they could be discharged to the municipal wastewater system.
(2) All floor drains located in process or materials storage areas must discharge to the industrial user's pretreatment facility before connecting with the system.
(3) When the POTW Director determines that a user(s) is contributing to the POTW, any of the above enumerated substances in amounts which may cause or contribute to interference of POTW operation or pass through, the POTW Director shall:
(a) Advise the user(s) of the potential impact of the contribution on the POTW in accordance with § 53.59(A) through (F); and
(Ord. – § 2.1, passed 9-26-2005) Penalty, see § 53.99
Users subject to categorical pretreatment standards are required to comply with applicable standards as set out in 40 C.F.R. Chapter 1, Subchapter N, Parts 405-471 and incorporated herein.
(A) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the POTW Director may impose equivalent concentration or mass limits in accordance with 40 C.F.R. 403.6(c).
(B) When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the POTW Director shall impose an alternate limit using the combined wastestream formula in 40 C.F.R. 403.6(e).
(C) A user may obtain a variance from a categorical pretreatment standard if the user can prove, pursuant to the procedural and substantive provisions in 40 C.F.R. 403.13, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard.
(D) A user may obtain a net gross adjustment to a categorical standard in accordance with 40 C.F.R. 403.15.
(Ord. – § 2.2, passed 9-26-2005)
(A) An industrial waste survey is required prior to a use discharging wastewater containing in excess of the following average discharge limits:
(1) BOD: 250 mg/l;
(2) TSS: 250 mg/l;
(3) NH3: 25 mg/l;
(4) Arsenic: 0.01 mg/l;
(5) Cadmium: 0.005 mg/l;
(6) Chromium: 0.05 mg/l (total chromium);
(7) Chlorides: 250 mg/l;
(8) Color: 15 color units;
(9) Copper: 0.06 mg/l;
(10) Cyanide: 0.015 mg/l;
(11) Lead: 0.015 mg/l;
(12) Mercury: 0.001 mg/l;
(13) Nickel: 0.01 mg/l;
(14) Silver: 0.01 mg/l; and
(15) Zinc: 0.175 mg/l.
(B) Industrial waste survey information will be used to develop user-specific local limits when necessary to ensure that the POTW's maximum allowable headworks loading are not exceeded for particular pollutants of concern. User-specific local limits for appropriate pollutants of concern shall be included in wastewater permits. The POTW Director may impose mass based limits in addition to, or in place of concentration based limits.
(Ord. – § 2.3, passed 9-26-2005)
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