United States Office of Water EPA821-B-01-003
Environmental Protection (4303) June 2001
Agency Version 3.0
4>EPA SMALL ENTITY COMPLIANCE GUIDE
Centralized Waste Treatment
Effluent Limitations Guidelines
and Pretreatment Standards
(40 CFR 437)
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DISCLAIMER
j i he Engineering and Analysis Division of EPA's Office of Water prepared this guide pursuant
j to section 212 of the Small Business Regulatory Enforcement Fairness Act of 1996 (SBREFA),
- Public Law 104-121. EPA intends this guide to aid small regulated entities that are direct or
indirect industrial dischargers in complying with recently published national regulations, "Effluent
Limitations Guidelines, Pretreatment Standards, and New Source Performance Standards for the
Centralized Waste Treatment Industry Point Source Category" (Federal Register, Vol. 65, No. 247,
pages 81242 - 81313, December 22, 2000).
The discussion in this document is intended solely as guidance. This guide is not a
regulation itself nor does not it substitute for any requirements under Clean Water Act or EPA's
regulations. Thus, it does not impose legally-binding requirements on EPA, States, or the regulated
community, and the general description provided here may not apply to a particular situation
based upon the circumstances. This guide does not confer legal rights or impose legal obligations
upon any member of the public.
Among other things, in the course of the guide, the document describes new and existing
requirements with respect to industrial dischargers under the Clean Water Act and its
implementing regulations at 40 CFR §§ 122, 123, 124 403 and chapter 1, subchapter N. A
discharger's legal duty requires it to comply with the CWA and its implementing regulations.
While EPA has made every effort to ensure the accuracy of the discussion in this guide, a
discharger's obligations are determined, in the case of direct dischargers by the terms of their
NPDES permit and EPA's regulations or in the case of indirect dischargers by permits or equivalent
control mechanisms issued to POTW industrial users or by regulatory requirements. Nothing in
this guide, of course, changes any statutory or regulatory requirement. In the event of a conflict
between the discussion in this guide and any permit or regulation, the guide would not be
controlling. EPA and local decision makers retain the discretion to adopt approaches on a case-by-
case basis that differ from those described in this guidance where appropriate. However, in any
civil or administrative action against a small business for violation of the effluent limitations
guidelines, pretreatment standards or new source performance standards for the centralized waste
treatment industry under 40 CFR Part 437, the content of this guide may be considered as evidence
of the reasonableness or appropriateness of proposed fines, penalties or damages.
Mention of trade names or commercial products does not constitute endorsement or
recommendation for their use.
EPA may decide to revise this guide without public notice to reflect changes in the Agency's
approach to implementing effluent limitations guidelines, pretreatment standards, and new source
performance standards for the centralized waste treatment industry, or to clarify and update text.
To determine whether the Agency has revised this guide and/or to obtain copies, contact EPA's
Small Business Ombudsman Office at (202)260-0490. You can also determine whether EPA has
revised or supplemented the information in this guide by accessing the document at:
www.epa.gov/ost/guide/cwti.html.
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1
INTRODUCTION
-"""--;"'- ihis document is published by the U.S. Environmental Protection Agency (EPA) as our official
| compliance guide for small entities, as required by the Small Business Regulatory
Enforcement Fairness Act of 1996. Before you begin using this guide you should know that
the rule for which EPA has prepared this guide was published on December 22, 2000. EPA is
continually improving and upgrading its rules, policies, compliance programs and outreach efforts.
You can determine whether EPA has revised or supplemented any of the rules or information
provided in this guide by visiting www.epa.gov/ost/guide/cwti.html.
EPA published the regulation titled " Effluent Limitations Guidelines and Pretreatment
Standards for the Centralized Waste Treatment Industry" (Federal Register, Volume 65, No. 247,
pages 81242 - 81313) on December 22, 2000 under the authority of the Clean Water Act (CWA).
EPA has prepared this small entity compliance guide because Section 212 of the Small Business
Regulatory Enforcement Fairness Act of 1996, Public Law No. 104-121, requires EPA to prepare and
publish such guides for any rule for which it has prepared a regulatory flexibility analysis under
the Regulatory Flexibility Act, 5 U.S.C. § 601, et seq. EPA prepared a regulatory flexibility analysis
of this rule and consequently also has developed this guide.
EPA designed this guide to help owners and operators of centralized waste treatment
(CWT) facilities that are small entities - whether they are small businesses, small government
jurisdictions or small non-profit organizations understand and comply with the CWT effluent
guidelines limitations and pretreatment standards ("the rule"). EPA has focused this guide on
what a small entity will need to know to comply with the regulation. Small entity is defined as (1)
a small business with gross revenue under $6 million (based on Small Business Administration size
standards); (2) a small governmental jurisdiction that is a government of a city, county, town,
school district or special district with a population less than 50,000; and (3) a small organization
that is any not-for-profit enterprise which is independently owned and operated and is not
dominant in its field.
1.1 Why is Proper Implementation Important?
Implementation of a regulation is obviously a critical component in achieving the desired
objectives of the regulation. If this regulation is not effectively implemented, then expected
reductions in pollutant discharges and the environmental benefits expected to be obtained from
the reduced discharges may not occur. Furthermore, CWT facilities that do not properly
implement the rule may not be able to comply with it and consequently may violate the CWA.
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INTRODUCTION CWT SMALL ENTITY COMPLIANCE GUIDE
Effective implementation of this regulation will require the cooperation of the CWT
facilities that are discharging their wastewater and the Federal, State and local authority that
regulate discharges from these facilities. In discussions with permitting control authorities, many
stressed the need for close communication with CWT facilities. Federal, State and local permit and
control authorities need to have a thorough understanding of a CWT facility's operations to
implement this rule properly. Likewise, CWT facilities must maintain close communication with
the generators and sources of the wastes and wastewater treated at the CWT facility in order to
accurately characterize and treat the incoming waste streams.
1.2 Who Should Use This Guide?
EPA developed this guide to aid small entities that are CWT facilities. CWT facilities treat
or recover hazardous or non-hazardous industrial waste, wastewater, or used material from off-
site. The entities that are subject to this rule include small entities that are CWT facilities that
either discharge wastewater directly into surface water or that introduce wastewater into publicly
owned treatment works.
Because the regulation establishes the same requirements for all affected facilities, this guide
is helpful for both small and large businesses that are CWT facilities.
1.3 What Does This Guide Cover?
EPA designed this information to provide guidance on implementing effluent limitations
guidelines and standards for the CWT industry. As part of this guidance, EPA included general
information on effluent limitations guidelines and pretreatment standards (that is, what are they?)
and specific information on those promulgated for the CWT industry. This guidance also enables
the reader to determine whether a facility is a CWT and, thus, affected by this rule, what CWT
wastewater discharges are subject to this rule, and what requirements a CWT facility may have to
meet to comply with this rule.
1.4 How to Use this Guide
This guide contains 11 chapters and 1 appendix:
Chapter 2 provides basic information on effluent guidelines and pretreatment standards. EPA
developed this chapter primarily for readers with little or no experience with
effluent limitations or pretreatment standards.
Chapter 3 provides a general overview of the CWT industry and summarizes the CWT rule.
This summary includes a description of the requirements of the CWT rule along
with a compliance timetable.
Chapter 4 provides guidance on what type of facilities and operations must comply with this
rule.
Chapter 5 provides information on determining what subcategories apply to a facility's
operations.
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INTRODUCTION
CWT SMALL ENTITY COMPLIANCE GUIDE
Chapter 6 provides information on implementing the rule for facilities complying with a
single subcategory only.
Chapter 7 provides information on implementing the rule for facilities complying with more
than one CWT subcategory.
Chapter 8 provides information on establishing equivalent treatment for facilities complying
with the multiple wastestream subcategory.
Chapter 9 includes information on the compliance assurance process. This chapter describes
how EPA determines compliance and how violations may be corrected.
Chapter 10 presents questions frequently asked during the development of this rule and EPA's
responses to those questions.
Chapter 11 provides a list of resources for additional help in complying with the regulation.
Appendix A presents the final limitations and standards for the CWT regulation.
How Do I Obtain a Complete Copy of the Rule?
You may obtain a complete copy of this rule at 65 Fed. Reg. 81242 (December 22,2000) or by
visiting www.epa.gov/ost/guide/cwti.html.
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2
OVERVIEW OF EFFLUENT LIMITATIONS GUIDELINES AND
PRETREATMENT STANDARDS
-- ., PA is providing basic information in this chapter on effluent limitations guidelines and
|: -:> pretreatment standards (ELGs). EPA has simplified the information presented so as to make
it useful to individuals with little or no experience with ELGs. You will find addition
information on ELGs in the preamble of the CWT rule.
2.1 What Are Effluent Limitations Guidelines and Pretreatment Standards?
Effluent limitations guidelines and pretreatment standards are restrictions which may apply to
wastewater discharges from CWT facilities. The Clean Water Act (CWA) prohibits the discharge
of pollutants into navigable waters except as otherwise authorized by the statute. It establishes
restrictions on the types and amounts of pollutants discharged from various industrial,
commercial, and public sources of wastewater. Among these are restrictions on the direct
discharge of effluent, i.e. wastewater, into navigable waters ("effluent limitations") and restrictions
on the indirect discharge of pollutants to navigable waters ("pretreatment standards") through
their introduction publicly owned treatment works (which, in turn, discharge to navigable waters).
These effluent limitations and pretreatment standards do not prevent CWT facilities from
discharging wastewater. However, they impose a requirement, or limit, on the concentration of
pollutants a CWT may discharge, regardless of its location in the United States or the condition of
the receiving water. ELGs are not water quality or health based requirements. Rather, as required
by the CWA, EPA bases ELGs on the performance of wastewater treatment technologies applied
to CWT wastestreams. ELGs represent the greatest pollutant reductions economically achievable
for the CWT industry.
CWT facilities are not the only facilities that may be subject to effluent limitations
guidelines and pretreatment standards. EPA develops ELGs on an industry-by-industry basis and
has developed effluent guidelines limitations and pretreatment standards for over 55 categories
of industries. Therefore, a facility which is required to meet the restrictions established by this rule
may also be required to meet the restrictions for another rule if it also performs industrial
operations in another regulated industrial category.
Effluent limitations and pretreament standards represent different sets of restrictions. As
noted above, effluent limitations apply to direct dischargers and pretreatment standards apply to
indirect dischargers. Finally, as mentioned above, ELGs are minimum requirements. The permit
writer or control authority may establish additional or tighter restrictions (based on site-specific
local POTW pretreatment ordinance limits, water quality standards, and other authority) than
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OVERVIEW OF ELGs
CWT SMALL ENTITY COMPLIANCE GUIDE
those established by this rule. Therefore, discharge requirements may be more restrictive than the
ELGs, but not less restrictive than the ELGs.
A CWT facility discharging wastewater
directly to waters of the U.S., the
construction of which commenced after
August 28,2000 is considered a new source.
2.2 Direct Dischargers and Effluent Guidelines
A direct discharger is a facility that
discharges pollutants directly to waters of the
U.S. such as a river or stream. If a CWT facility
is a direct discharger, it is required to have a
permit to discharge wastewater an NPDES
permit. NPDES permits are drafted by
"Permitting Authorities" and contain effluent limitations.
For CWT direct discharging facilities, EPA has established four overall sets of limits which
may apply. These are referred to as BPT, BCT, BAT, or NSPS. These acronyms stand for Best
Practicable Control Technology Currently Available, Best Conventional Pollutant Control
Technology, Best Available Technology
Economically Achievable, and New Source
Performance Standards, respectively.
Existing direct discharging CWT facilities
are required to comply with BPT for
conventional pollutants1 (BOD5, TSS, oil and
grease, pH) and BAT for all other regulated
pollutants. New source direct dischargers
must comply with NSPS for all regulated
pollutants. The BPT, BCT, BAT, and NSPS
limits are listed in Appendix A.
BPT-
Best Practicable Control Technology,
Economically Achievable.
Best Available Control Technology,
Economically Achievable.
Best Conventional Control Technology,
Economically Achieveable.
NSPS - New Source Performance Standards.
PSNS - Pretreatment Standards for New Sources.
PSES - Pretreatment Standards for Existing Sources.
BAT-
BCT-
2.3 Indirect Dischargers and Pretreatment Standards
An indirect discharger is a facility that discharges
In this guide and the CWT rule
and preamble, EPA refers to the
POTW or the state collectively
as the "control authority."
pollutants to surface water indirectly by introducing
pollutants into a publically owned treatment works
(POTW). POTWs are often referred to as municipal
wastewater treatment plants. If a CWT facility discharges
wastewater to a sewer, then it is an indirect discharger. It is
also an indirect discharger if it trucks or sends its
wastewater to a POTW by barge or rail. Permits for indirect dischargers are drafted by "Control
Authorities" and contain pretreatment standards.
Conventional pollutants also include fecal coliform, but EPA has not regulated
fecal coliform in the CWT rule.
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OVERVIEW OF ELGs
CWT SMALL ENTITY COMPLIANCE GUIDE
A CWT facility discharging wastewater
to a POTW, the construction of which
commenced after August 28, 2000 is
considered a new source.
For CWT indirect discharging facilities, EPA
has established two overall sets of pretreatment
standards which may apply. These are referred to
as PSES and PSNS. These acronyms stand for
Pretreatment Standards for Existing Sources and
Pretreatment Standards for New Sources. Existing
indirect dischargers must comply with PSES. New sources that are indirect dischargers must
comply with PSNS. PSES and PSNS do not contain restrictions for conventional pollutants because
POTWs are generally designed to treat these parameters effectively. PSES and PSNS are listed in
Appendix B.
2.4 Zero or Alternative Dischargers and ELGs
Some CWT facilities do not discharge process wastewater into waters of the U.S. or a POTW.
These facilities are referred to as zero or alternative dischargers. Zero or alternative discharging CWT
facilities dispose of their process wastewater through ^^^^^^^^^^^^^^^^^^^_^
evaporation, land application, deep well injection, or off-
site transfer to a facility other than a POTW. These
facilities do not have to meet the restrictions established
by this rule (these facilities may have to meet restrictions
established under other acts or rules, such as the Clean
Air Act or RCRA). However, if a CWT transfers its
process wastewater off-site directly to a POTW, then the
CWT standards would continue to apply to that wastewater (this would not be true if the CWT
wastewater is sent off-site to another CWT). If a zero or alternative discharging CWT facility alters
its disposal method and becomes a direct or indirect discharger, then it will be required to comply
with the applicable CWT restrictions. A CWT facility which is currently a direct or indirect
discharging facility and alters its wastewater disposal method to become a zero or alternative
discharger would no longer be regulated under this rule.
In the remainder of this
document, EPA refers to control
mechanism or permit to
discharge to a POTW collectively
as the "control mechanism."
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3
THE CWT INDUSTRY AND THE CWT RULE
i i f -:his chapter provides a general overview of the CWT industry and the CWT rule. It also
i includes general information on the requirements of the CWT rule. EPA developed this
! i chapter primarily for readers unfamiliar with this industry or this rule. Interested parties
may obtain additional information from the preamble or the technical development
document for the rule.
3.1 What Is A CWT Facility?
A CWT facility is one that accepts for treatment and/or recovery used industrial materials
generated off-site (at another location). These used materials may be hazardous, non-hazardous,
solid, or liquid. A CWT facility may be a stand alone operation (i.e., centralized waste treatment
is the only operation at that site) or it may be operated in conjunction with other industrial
operations (such as production of chemicals).
CWT facilities do not fall into a single
description. Some treat used materials or wastes
from a few generating facilities while others treat
wastes from hundreds of generators. Some treat
non-hazardous wastes exclusively while others
treat hazardous and non-hazardous wastes. Some
primarily treat concentrated wastes while others
primarily treat dilute wastes. Some primarily
perform wastewater treatment or materials
recovery and recycling, while others perform both.
EPA estimates there are 223 centralized
waste treatment facilities in 38 states. The major concentration of centralized waste treatment
facilities is in EPA Region 4, 5 and 6 due to the proximity of the industries generating the wastes
undergoing treatment. The vast majority of CWT
facilities are indirect dischargers. Fewer than
10% are direct dischargers. The average volume
of wastewater discharged on an annual basis by
an indirect discharging CWT facility is 9.3 million
gallons while a direct discharging CWT facility
averages 38 million gallons/year. EPA estimates
that sixty-three small companies own
discharging facilities that are subject to the
requirements of this rule.
Treatment means any method, technique,
or process designed to change the
physical, chemical or biological character
or composition of any metal-bearing,
oily, or organic waste so as to neutralize
such wastes, to render such wastes
amenable to discharge or to recover
energy or recover metal, oil, or organic
content from the wastes.
In this document, wastes are defined as
aqueous, non-aqueous, and solid waste,
wastewater, and/or used material.
Waste receipts are those wastes that CWT
facilties receive from off-site for the
purpose of treatment. Waste receipts do
not include those wastes generated at the
CWT as part of its regular operation.
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THE CWT INDUSTRY AND THE CWT RULE
CWT SMALL ENTITY COMPLIANCE GUIDE
Figure 3-1EPA Regions
3.2 What is the CWT Rule and What Does It Require?
The CWT rule contains effluent limitations guidelines and standards for the CWT industry.
These are numerical restrictions that may be applied to the discharge of wastewaters from CWT
facilities to waters of the U.S. or the introduction of wastewater from a CWT facility into a POTW.
The CWT rule requires facilities that are subject to this rule to meet these discharge requirements.
EPA developed different effluent limitations and
standards for the CWT operations depending on the type of
waste received by the CWT. There are four types, or
subcategories, of waste (oily, metals, and organics wastes and
a fourth, a mixture of any of the three previously listed waste
types). The subcategories are as follows :
Chapter 5 provides
guidance on determining
the applicable subcategories.
Subcategory A:
Subcategory B:
Subcategory C:
Subcategory D:
Facilities that treat or recover metal from metal-bearing waste, wastewater,
or used material received from off-site;
Facilities that treat or recover oil from oily waste, wastewater, or used
material received from off-site;
Facilities that treat or recover organics from organic waste, wastewater, or
used material received from off-site; and
Facilities that treat or recover some combination of metal-bearing, oily, or
organic waste, wastewater, or used material received from off-site.
Chapter 8 provides
more information on
demonstrating
equivalent treatment.
CWT facilities that fall within multiple subcategories (A, B, or C) may
elect to comply with each set of restrictions separately or those
established for Subcategory D. If a facility elects to comply with the
Subcategory D limitations, the CWT rule requires the facility to
demonstrate equivalent treatment.
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THE CWT INDUSTRY AND THE CWT RULE
CWT SMALL ENTITY COMPLIANCE GUIDE
3.3 What Treatment Technologies Were Used to Establish the CWT Limitations and
Pretreatment Standards?
EPA based the effluent limitations for existing CWT facilities on the following technologies:
Table 3-1 Technology Basis for the Final CWT Limitations for Existing Facilities
Subpart Name of Subcategory
Technology Basis
Metal-Bearing Waste
Treatment and Recovery
(metals)
A Metal-Bearing Waste Batch Precipitation, Liquid-Solid Separation, Secondary
Precipitation, Clarification, and Sand Filtration
For Metal-Bearing Waste Which Includes Concentrated
Cyanide Streams:
Alkaline Chlorination in a two step process
B Used/Waste Oil Treatment Emulsion Breaking/Gravity Separation, Secondary
and Recovery Gravity Separation and Dissolved Air Flotation
(oils)
C Organic Waste Treatment Equalization and Biological Treatment
(organic)
EPA based the pretreatment standards for the metals1 and organics subcategories on the same
technologies as those listed in Table 3-1. For the oils subcategory, however, the technology basis
for the pretreatment standards is emulsion breaking/ gravity separation and dissolved air flotation.
The technology basis for the effluent limitations and standards for new CWT facilities for the
oils and organics subcategories are the same as those listed in Table 1. For new CWT metals
facilities, however, the technology basis for the limitations is selective metals precipitation, liquid-
solid separation, secondary precipitation, liquid-solid separation, tertiary precipitation, and liquid-
solid separation.
The CWT rule only establishes numerical restrictions on a CWT
facility's discharge. It does not establish monitoring frequencies nor
does it require that a particular technology be used. A CWT facility
may use any technology it deems appropriate as long as its
discharges are not in excess of those established in the rule.
The CWT rule does not
require a specific
treatment technology.
lrThe treatment technology basis for PSES for the metals subcategory does not include sand
filtration
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CWT SMALL ENTITY COMPLIANCE GUIDE
3.4 What CWT Discharges Are Subject to This Rule?
The wastewater discharges covered by this
rule include some or all discharges related to
materials received from off-site (waste receipts)
and on-site CWT wastewater generated as a
result of CWT operations. Examples of off-site
waste receipts include metal finishing rinse
Discharges of non-contaminated
stormwater are not subject to this rule
and should not be mixed with discharges
subject to this rule prior to complete
treatment of covered wastewaters.
waters and sludges, used oils, and leachate or
^^^^^^^^^^_^^^^^^^^^^^ groundwater cleanup. On-site CWT wastewater include:
solubilization wastewater, emulsion breaking/gravity
separation wastewater, used oil processing wastewater,
treatment equipment washes, transport washes (tanker
truck, drum, and roll-off boxes), laboratory-derived
wastewater, air pollution control wastewater, landfill
wastewater from on-site landfills, and contaminated storm
water.
See Chapter 14 of the technical
development document for a
detailed description of
stormwater (contaminated and
non-contaminated) and
wastewaters subject to this rule.
Compliance Timetable
As described above, the CWT rule requires facilities subject to the rule to comply with the
applicable set(s) of effluent limitations or standards. The following table summarizes these
requirements and the required compliance dates.
Table 3-2 Compliance Times for CWT Facilities
Type of CWT Facility1
Requirement
Deadline
Existing Direct Discharger
New Direct Discharger
Comply with BPT (conventional
pollutants) and BAT (other regulated
pollutants)
Comply with NSPS
Existing Indirect Discharger Comply with PSES
New Indirect Discharger
Comply with PSNS
when your federal or
state NPDES permit is re-
issued
when you begin
discharging
December 22, 2003
when you begin
discharging
A new discharger is a CWT facility that commences construction after August 28, 2000
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THE CWT INDUSTRY AND THE CWT RULE CWT SMALL ENTITY COMPLIANCE GUIDE
3.6 How Does This Regulation Relate to Other Federal, State, and Local Requirements?
Effluent limitations and standards act as a primary mechanism to control the concentration of
pollutants discharged into waters of the United States. These effluent limitations and standards
are applied to individual facilities through NPDES permits or control mechanisms developed by
POTWs or authorized States under Section 402 of the CWA and local pretreatment programs under
Section 307 of the CWA.
A CWT facility may be required to comply with more stringent limits than those contained in
the CWT rule, pursuant to (1) federal or state statutes or rules or (2) local ordinances. For example,
certain POTWs are required by federal regulations to develop local limits to protect against pass-
through and interference. This means the control authority must develop local limits that protect
the treatment plant from pollutants that may upset the plant, pass-through the plant untreated (or
inadequately treated), may endanger the well being of workers, or would inhibit sludge
management practices. These local limits may be more stringent than the CWT pretreatment
standards.
In addition to CWT requirements, other federal, state, or local requirements may also apply
to a CWT facility. These may include, but are not limited to, other NPDES program and general
pretreatment requirements (CWA), waste tracking requirements (RCRA, EPCRA), waste
management planning requirements (RCRA), spill prevention, reporting and emergency response
requirements (SPCC, EPCRA), and maximum achievable control technology (MACT) requirements
(CAA). In general, the CWT rule will not impact these other requirements.
3.7 What Steps Do I Need to Take to Comply With This Rule?
1. A CWT facility should determine if its operations are subject to the CWT rule. Chapter 4
describes the applicability of the CWT rule to various CWT operations.
2. If a facility is subject to the CWT rule, it should determine what subcategory its wastes may
be classified into. Chapter 5 provides guidance on classifying wastes.
3. If a CWT facility accepts wastes in more than one subcategory, it must decide to comply with
each applicable set of limitations or standards separately or to comply with the applicable set
of multiple wastestream subcategory effluent limitations or standards. If the facility chooses
the later, it will be required to demonstrate equivalent treatment (See Chapter 8).
4. A CWT facility must determine if its treatment system will allow it to meet the required
discharge restrictions. If not, it will be required to alter its operation or treatment system prior
to the compliance date to achieve the discharge restrictions.
5. If a CWT facility is an indirect discharger, it must also _ ~AT1TT , ,
, , , The CWT rule does not require a
comply with the general pretreatment reporting BMR; the general pretreatment
requirements which includes submission of a baseline
monitoring report within 180
days of the effective date of the
CWT rule, or July 21, 2001. This
baseline monitoring report
The effective date
of the CWT rule is
January 22, 2000.
regulations do. BMRs for
existing indirect discharging
CWTs are due on July 21,2001.
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THE CWT INDUSTRY AND THE CWT RULE CWT SMALL ENTITY COMPLIANCE GUIDE
(BMR) must include results of sampling and analysis identifying ,, , , , , c
v ' r & 3 3 & You can obtain 40 CFR §
the concentration of all regulated pollutants in its discharges.
Additional information on this requirement can be found in 40 CFR
§ 403.12(b).
403.12 through EPA's
web site: www.epa.gov
3.8 What Compliance Monitoring Is Required by the CWT Rule?
The CWT rule does not establish monitoring frequency requirements. Monitoring frequencies
are found in other sections of the CWA regulations. For example, §403.12(e) requires industrial
users (lUs) subject to categorical pretreatment standards, such as the CWT regulations, to self-
monitor and report at least twice per year. Additionally, pursuant to 40 CFR 403, POTWs, or
control authorities, have developed industrial pretreatment programs (IPPs). IPPs generally
contain guidelines for determining monitoring frequencies. Permitting and control authorities look
towards these rules, IPPs, and guidelines to determine monitoring frequencies. They also consider
the individual characteristics of a site, such as compliance history of the facility and other relevant
factors.
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4
APPLICABILITY
-:his chapter provides guidance on the types of facilities and CWT operations that must
comply with this rule. It is only a summary. The preamble to the rule contains detailed
information on many of these operations.
4.1 Regulated and Non-Regulated CWT Activities
The CWT rule applies to all wastewater discharges to
See also Section V of the
preamble and Chapter 3 of the
Development Document.
a receiving stream or to a POTW from a facility defined by the
rule as a CWT facility unless specifically excluded. As
previously noted, the rule does not establish different
requirements for CWT that are small entities. The rule defines
a CWT facility as "any facility that treats and/or recovers or recycles any hazardous or non-
hazardous industrial waste, hazardous or non-hazardous industrial wastewater, and/or used
material from off-site." The following table provides a general summary of regulated and non-
regulated CWT activities.
Table 4-1 Examples of Regulated and Non-Regulated CWT Operations
Centralized Waste
Treatment Activity
Regulated by this rule
Not Regulated by this rule
Those performed at
federally owned
facilities
POTWs
Thermal drying of
POTW biosolids
Sanitary wastes or
toilet wastes
Food processing
all federally owned CWT operations
none
none
none
none
none
all
all
all
all
wastes
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APPLICABILITY
CWT SMALL ENTITY COMPLIANCE GUIDE
Table 4-1 Examples of Regulated and Non-Regulated CWT Operations
Centralized Waste
Treatment Activity
Regulated by this rule
Not Regulated by this rule
Manufacturing
facilities
those that accept off-site wastes for treatment
and/or recovery that are not generated in a
manufacturing process subject to the same
limitations/standards as on-site generated waste
and that the permit writer determines are not
similar to, and compatible with treatment of, the
on-site waste
those that accept waste materials from use of
, , , , , . their products that are not similar to, and
Product stewardship r ,. ..,.. . c ^ ^ A
compatible with, treatment of waste generated
Pipeline materials
Recycle/recovery
activities
Traditional solvent
recovery
Fuel blenders
Scrap metals
recyclers
Silver recovery
Used oil filters & oily
absorbent recycling
High Temperature
Metals Recovery
(HTMR)
Used glycol recovery
Re-refining
Solids, soils, and
sludges
Stabilization/ Solidifi
cation
Transfer stations and
recycling centers
on-site
materials received via pipeline from waste
consolidators or commingled with other covered
CWT wastewaters
all unless specifically excluded elsewhere
none
those that generate a wastewater
none
only included where wastewater generated from
these activities is commingled with other
covered wastes
those that generate a wastewater
those that generate a wastewater
all
all
those activities which generate a wastewater
unless specifically excluded
those that generate a wastewater
none
all others
those that accept back their
unused products, shipping
and storage containers with
product residues, and off-
specification products
all other piped materials and
POTWs
aU
"Dry" operations
aU
all others
"Dry" operations
"Dry" operations
none
none
"dry" operations
"Dry" operations
aU
4-2
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APPLICABILITY
CWT SMALL ENTITY COMPLIANCE GUIDE
Table 4-1 Examples of Regulated and Non-Regulated CWT Operations
Centralized Waste
Treatment Activity
Regulated by this rule
Not Regulated by this rule
only included when the wastewater generated
Incineration activities from these activities is received from off-site and all others
commingled with other covered wastewater
,. only included where wastewater generated from
, ,. these activities is commingled with other all others
transportation , . °
. i . covered waters
equipment cleaning
Landfills
Grease
trap/interceptor
wastes
Marine generated
wastes
only included where wastewater generated from
these activities is commingled with other all others
covered waters
those which contain petroleum based oils
off-loaded and subsequently sent to a CWT
facility at a separate location and commingled
with other covered wastewater
Waste, wastewater or those activities not listed in the next column or
used material re-use excluded elsewhere
Treatability, research
and development, or
analytical activities
only included where wastewater generated from
these activities is commingled with other
covered waters
those which contain animal
or vegetable fats/oils
all others
not covered if the
wastewater is accepted for
use in place of potable water
or if materials are accepted
in place of virgin treatment
chemicals.
all others
4-3
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Le".
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5
DETERMINING THE APPLICABLE SUBCATEGORIES
CWT facilities accept a wide variety
of materials, such as oils and acids.
Although many of these materials
are processed and reused, for
purposes of this guidance and the
rule, the material is collectively
referred to as 'waste/
P :, ;his chapter provides guidance on determining the
j applicable CWT subcategories for wastes accepted
ij at a CWT facility. EPA developed this chapter to
provide guidance to CWT facilities. EPA is aware
that many CWT facilities may classify their wastes
differently. The CWT rule does not require CWT
facilities, control authorities, or permitting authorities to
use this subcategorization process. EPA has provided it
only as guidance.
5.1 Waste Acceptance Procedures
In absence of the CWT rule, CWT facilities have already established waste acceptance
procedures. The CWT rule does not establish waste acceptance procedures. However, in EPA's
view, these procedures are critical in determining the applicable CWT subcategories and in
conducting adequate treatment or recovery, and in ensuring the wastes accepted conform to a
faciliy's discharge permit or control mechanism. Certainly, all CWT facilities should, at a
minimum, collect adequate information from the generator on the type of waste received since this
is the minimum information required by CWT facilities to effectively treat off-site wastes.
Consequently, EPA has included information on waste acceptance procedures as the first step in
its guidance for determining subcategories. The following paragraphs describe the waste
acceptance procedures generally performed at most CWT facilities.
Before a CWT facility accepts a wastestream for treatment, the CWT facility typically
performs a pre-approval review of the proposed wastestream. This pre-approval process may
include screening the waste for treatability and compatibility with both other wastes being treated
and the treatment system. The waste generator initially furnishes the CWT facility information
concerning the level of pollutants in the wastestream. Bench-scale treatability tests are typically
performed to determine what treatment is necessary for effective removal. At this point, the CWT
facility decides whether to approve the wastestream for acceptance. If the wastestream is
approved, each load received by the CWT facility is typically sampled to ensure that it is consistent
with the initially approved wastestream. If the sample is similar, the shipment of waste is accepted
for treatment. If the sample is dissimilar, but falls within an allowable range as determined by the
CWT facility, the CWT facility will reevaluate acceptance. This reevaluation may include
additional testing. Once the reevaluation is completed, the generator is contacted to discuss the
discrepancy and reach a resolution. Please note that the level of screening is based on the source
of the waste and the processes used. Figure 5-1 below is an example of a waste profile form.
5-1
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DETERMINING THE APPLICABLE SUBCATEGORIES
CWT SMALL ENTITY COMPLIANCE GUIDE
ANYFIRM GENERATOR'S
ANYTOWN, USA MATERIAL PROFI
(555)555-1212 _ N£W
AMENDMENT
GENERATOR
Name
Address
Technical Contact Phone
Shipping Contact Phone
Business Contact Phone
EPA ID #
WASTE DESCRIPTION
WASTE PROFILE NUMBER
LE SHEET
BROKER OR SALESPERSON
Name
Address
Contact | Phone
TRANSPORTER
Name
Address
Contact I Phone
EPA ID #
Applicable Manufacturing Category (if any):
CHEMICAL & PHYSICAL STATE
Liquid Multilayered
Semi-liquid Bilayered
Solid Single Phase
PH
2 8-10
2-4 10-12
4-6 -12
_ 6-8 _ N/A
Odor
TSS
Color
Flash Point
% Bottoms Sediment
% Debris
% Ash
Specific Gravity
PROCESS DESCRIPTION
(Describe process generating waste stream. Include a list of virgin materials and their Material Safety Data Sheets.)
CHEMICAL CONSTITUENTS
Petroleum Phase Aqueous Phase
OTHER CONSTITUENTS
% Oil (or ppm Oil)
METALS (PPM)
Arsenic Magnesium
Cadmium Mercury
Chromium Nickel
Copper Tin
Lead Zinc
SHIPPING INFORMATION
RCRA Code
Shipping Method
Volume (gallons)
Figure 5-1 Sample Waste Acceptance Form
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DETERMINING THE APPLICABLE SUBCATEGORIES
CWT SMALL ENTITY COMPLIANCE GUIDE
Furthermore, CWT facilities and waste generators complete extensive amounts of
paperwork during the waste acceptance process. The amount of paperwork necessary for
accepting a waste stream emphasizes the difficulty of operating CWT facilities.
Finally, EPA emphasizes that while the CWT rule does
not require waste segregation, CWT facilities should encourage
their waste generators to segregate their wastestreams (i.e.,
keep metal bearing wastes separate from organic-bearing
wastes). This will help CWT facilities comply with the CWT
rule and more effectively utilize their treatment technologies.
The CWT rule does not
require waste segregation.
EPA recognizes that
commingling wastes can be
beneficial in certain cases.
5.2 Initial Subcategory Determination for Existing CWT Facilities
Based on information provided by CWT facilities during the development of the CWT rule,
EPA has developed guidance for determining subcategorization. This guidance, which consists
of three basic steps, is illustrated in Figure 5-2 below. For many CWT facilities, however, steps 1
and 2 will be sufficient to determine into which subcategory the wastes treated at its facility should
be classified. Step 3 would only be necessary if the first two steps are inconclusive. This guidance
will help facilities classify their incoming wastes into the metals, oils, or organics subcategory. A
facility that accepts waste in more than one of these subcategories may also be classified as
"mixed". This is detailed in Chapter 7.
Incoming Waste
Receipt Data Collection
- collected when each
shipment is received at
the facility.
Compare Waste
Receipt Information
to Waste Receipt
Classification Table,
>=>
For waste receipts that are
unknown or not listed in the
waste receipt classification
table, the facility should
consult the numerical criteria.
Figure 5-2 Subcategory Determination Procedure
Step 1: Waste Receipt Data Collection
The first step in EPA's recommended subcategory determination procedure is to collect
information on the incoming waste receipts. This data is usually collected at the point where the
shipment is received by the CWT facility. Most (if not all) CWT facilities are already performing
this step. EPA believes that the paperwork and analyses currently performed at CWT facilities as
part of their waste acceptance procedures provide CWT facilities with sufficient information to
complete this step. Figure 5-1 shows an example of a waste acceptance form typical of those used
at existing CWT facilities.
Step 2: Compare Waste Receipt Information to Waste Receipt Classification Table
In Step 2, the CWT facility should review data collected from its waste receipts for a period
of one year. The CWT facility should use common sense to determine which subcategory the waste
falls into. To assist the CWT facility, it may use the waste classification table (Table 5-1) to classify
5-3
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DETERMINING THE APPLICABLE SUBCATEGORIES
CWT SMALL ENTITY COMPLIANCE GUIDE
each of its waste receipts for that one year period into Subcategory A (Metals), B (Oils), or C
(Organics).
If the CWT facility receives the wastes listed in the waste classification table, the
subcategory determination may be made solely from this information. For purposes of this rule,
the CWT facility need not determine the percentage of each type of waste within a subcategory or
between subcategories. The CWT facility only need to determine what subcategory the wastes fall
into: one or multiple subcategories. When subcategory determination is complete, the facility may
refer to Chapter 6 for implementing the rule if only one subcategory applies or Chapter 7 if more
than one subcategory applies.
Table 5-1 Waste Receipt Classification
Metals Subcategory
spent electroplating baths and/or sludges
metal finishing rinse water and sludges
chromate wastes
air pollution control blow down water and sludges
spent anodizing solutions
incineration wastewaters
waste liquid mercury
cyanide-containing wastes
waste acids and bases with or without metals
cleaning, rinsing, and surface preparation solutions from
electroplating or phosphating operations
vibratory deburring wastewater
alkaline and acid solutions used to clean metal parts or equipment
Oils Subcategory
used oils
oil-water emulsions or mixtures
lubricants
coolants
contaminated groundwater clean-up from petroleum sources
used petroleum products
oil spill clean-up
bilge water
rinse/wash waters from petroleum sources
interceptor wastes
off-specification fuels
underground storage remediation waste
tank clean-out from petroleum or oily sources
non-contact used glycols
aqueous and oil mixtures from parts cleaning operations
wastewater from oil bearing paint washes
Organics
Subcategory
- landfill leachate
- contaminated groundwater clean-up from non-petroleum sources
- solvent-bearing wastes
- off-specification organic product
- still bottoms
- byproduct waste glycol
- wastewater from paint washes
- wastewater from adhesives and/or epoxies formulation
- wastewater from organic chemical product operations
- tank clean-out from organic, non-petroleum sources
5-4
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DETERMINING THE APPLICABLE SUBCATEGORIES CWT SMALL ENTITY COMPLIANCE GUIDE
This classification is not inclusive of all possible wastestreams. It is simply a guidance of
the typical wastestreams in each subcategory.
Step 3: Waste Characterization Using Numerical Criteria
For wastestreams that are from non-specific sources or not listed in the waste receipt
classification table, the facility should additionally complete Step 3. In Step 3, the facility should
use data collected during the waste acceptance procedures to classify the waste into the appropriate
subcategory. EPA recommends the CWT facility apply the following hierarchy:
1). If the waste receipt contains oil and grease at or in excess of 100 mg/L, the waste
receipt should be classified in the oils subcategory;
2). If the waste receipt contains oil and grease <100 mg/L, and has any of the
pollutants listed below in concentrations in excess of the values listed below, the
waste receipt should be classified in the metals subcategory.
cadmium
chromium
copper
nickel
0.2 mg/L
8.9 mg/L
4.9 mg/L
37.5 mg/L
3). If the waste receipt contains oil and grease < 100 mg/L and does not have
concentrations of cadmium, chromium, copper, or nickel above any of the values
listed above, the waste receipt should be classified in the organics subcategory.
At this point, the CWT facility has determined the applicable subcategories and should refer
to Chapter 6 for implementing the rule if only one subcategory applies or Chapter 7 if more than
one subcategory applies.
5.3 Follow-Up Subcategory Determination Procedures
Once the CWT facility's initial subcategory determination (oils, metals, organics, or mixed)
has been made, the facility will not need to repeat this determination process where its
wastestreams remain consistent. This includes accepting a new wastestream that is within the
CWT facility's current subcategory. However, if a CWT facility alters its operation to accept wastes
from a subcategory outside its permit (or to no longer accept waste from a subcategory), the facility
should notify the appropriate permitting or control authority and the subcategory determination
should be re-visited. EPA notes that current permit and pretreatment regulations require
notification to the permitting or control authority when significant changes occur. EPA also
recommends that a facility revisit its subcategory determination whenever the permit or control
mechanism is re-issued, though this would not necessarily require complete characterization of a
subsequent year's waste receipts if there is no indication that the make-up of the CWT facility's
receipts had significantly changed.
5-5
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DETERMINING THE APPLICABLE SUBCATEGORIES CWT SMALL ENTITY COMPLIANCE GUIDE
5.4 Subcategory Determination Procedures for New CWT Facilities
New CWT facilities should estimate the percentage of waste receipts expected in each
subcategory. Alternatively, the facility could compare the treatment technologies being installed
to the treatment technologies selected as the basis for the limitations or standards for each
subcategory. After the initial year of operation, the permit writer or control authority should
reassess the facility's subcategory determination and follow the procedure outlined for the initial
determination for existing facilities. Because of the variable nature of waste receipts at CWT
facilities, EPA recommends issuance of short-term permits or control mechanisms for new CWT
facilities.
5.5 On-Site Wastewater Subcategory Determination
The sections above explain how an entity might approach classifying its off-site
wastestreams. For other on-site generated wastewater sources such as those described in Chapter
4 (for example, contaminated stormwater, emulsion breaking wastewater, solubilization
wastewater), wastewater generated in support of, or as the result of, activities associated with each
subcategory should be classified in that subcategory. For facilities that are classified in a single
subcategory, this step is unnecessary as the facilities should generally classify on-site wastewater
in that subcategory.
For facilities that are classified in more than one subcategory, and do not elect to comply
with the multiple wastestream subcategory limits, the facilities should apportion the on-site
generated wastewater to the appropriate subcategory. Certain waste streams may be associated
with more than one subcategory such as stormwater, equipment/area washdown, air pollution
control wastewater, etc. For these wastewater sources, the volume generated should be
apportioned to each associated subcategory. For example, for contaminated stormwater, the
volume can be apportioned based on the proportion of the surface area associated with operations
in each subcategory. Equipment/area washdown may be assigned to a subcategory based on the
volume of waste treated in each subcategory. Alternatively, permitting or control authorities may
assign the on-site wastestreams to a subcategory based on the appropriateness of the selected
subcategory treatment technologies. EPA notes that this is only necessary for multiple
subcategory facilities which elect not to comply with the Multiple Wastestream Subcategory
limitations or standards.
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DETERMINING THE APPLICABLE SUBCATEGORIES CWT SMALL ENTITY COMPLIANCE GUIDE
5.6 Examples
Example 1
A CWT facility has been operating for ten years and services 30 customers. This facility is located around
auto manufacturers and mainly accepts metal finishing rinsewaters. Over the past two years the facility has
also accepted used oils for recovery. It also accepts wastewaters from some customers that are unknown in
origin, but which usually have oil and grease levels about 100 mg/L. This facility generates emulsion
breaking/gravity separation wastewater and equipment cleaning wastewater. It also collects and discharges
rainwater collected on its property, but all of the CWT facility's activities occur inside a building.
This facility may wish to review first all of its incoming waste receipts from the past year
to ensure that the wastes listed above are the only wastes accepted for treatment. It may then
compare its wastestreams to the waste receipt classification table. The waste classification table
indicates that the metal finishing rinsewaters are classified in the metals subcategory and the used
oils are classified in the oils subcategory. The wastes of non-specific origin can not be classified
using the waste classification table, so this facility should utilize Step 3 for these wastes. The
facility notes that these wastes usually have oil and grease levels in excess of 100 mg/L. Therefore,
based on the hierarchy established for Step 3, these non-specific wastes are also classified in the oils
subcategory. Therefore, this facility is both a metals and an oils subcategory facility.
This facility also discharges on-site generated wastewaters - emulsion breaking wastewater
and stormwater. The facility must determine if the discharge of these on-site wastewaters is subject
to the CWT rule (that is, defined as "CWT process wastewaters"). As described in Chapter 3,
emulsion breaking wastewaters are subject to this rule. Stormwater, however, may or may not be
subject to this rule. Based on the information provided, since the stormwater is collected outside
the building, and there are no operations whatsoever outside, this stormwater is most likely non-
contact stormwater and not a CWT process wastewater subject to this rule. Necessarily, if the non-
contact stormwater is introduced prior to the monitoring location, the limits would be adjusted
using the combined wastestream formula or building block approach to account for the
stormwater. If the facility maintains a waste handling area outside the building and this
stormwater comes in contact with this waste handling area, it is contact stormwater and is CWT
process wastewater subject to this rule.
If this facility elects to comply with the mixed waste
subcategory, it does not need to classify these on-site CWT
j,- , ., c .,.. i . . Non-contact stormwater is not
process wastewaters. If, however, the facility elects to ^1TrT,
CWT process wastewater and
does not need to be classified
into a subcategory.
comply with the limitations or standards for the metals and
oils subcategory separately, it will be additionally required
to classify the on-site CWT process wastewaters into the
metals or oils subcategory. Clearly, the emulsion breaking
wastewater and any wastewater associated with cleaning the treatment equipment for these
wastewaters will be classified in the oils subcategory. Likewise, any wastewater associated with
cleaning the treatment equipment for the metals subcategory wastes will be classified in the metals
subcategory. If the stormwater is contact stormwater and the facility collects the contact
stormwater from dedicated areas of the facility for each subcategory, then these wastewaters would
be classified accordingly. If these contact stormwaters are not collected from dedicated areas, the
5-7
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DETERMINING THE APPLICABLE SUBCATEGORIES
CWT SMALL ENTITY COMPLIANCE GUIDE
facility could sample the wastewater to determine the level of oil and grease. If these levels exceed
100 mg/L, then these wastewaters will be classified in the oils subcategory. The facility may use
other methods as long as they can demonstrate to the permitting or control authority that these on-
site wastewaters receive adequate treatment.
Example 2:
The following is a waste receipt log for a single day for a CWT facility:
Table 5-2 Sample Waste Receipt Log
Customer
1
2
3
4
5
6
7
Waste Type
used oil
lubricants
oily wastewater
leachate
metal finishing waste
bilge water
electroplating waste
oil and grease
(mg/L)
40,000
50,000
250
20
15
99
150
Chromium
(mg/L)
10
2
non-detect
12
200
5
100
nickel
(mg/L)
15
50
non-
detect
39
1500
7
3000
Volatile Organic
Compounds
(VOCs)
(ug/L)
40
non-detect
20
100
non-detect
25
non-detect
This facility would only need to complete Step 2 to determine the waste receipt
classification for this day's waste receipts. All of the waste types are listed in the waste
classification table. Used oils, lubricants, oily wastewater, and bilge water are all in the oils
subcategory. Leachate is in the organics subcategory, and metal finishing and electroplating wastes
are in the metals subcategory. This facility would not complete Step 3 since the waste receipt table
generally takes precedence over the numerical criteria hierarchy. Notice, however, that if the
wastewater from customer 6 was an unknown waste type, this facility would need to complete Step
3. Using this step, the wastewater from customer 6 would be classified in the organics subcategory.
This is a different subcategory than was established using Step 2.
5-8
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8
SINGLE SUBCATEGORY FACILITIES
hapter 6 provides guidance to aid small entities in determining what CWT subcategories
i \ may apply to their CWT discharges. Many CWT facilities are subject to discharge limits
- for a single subcategory only. This chapter describes how CWT facilities that accept waste
in only one CWT subcategory may comply with the CWT rule.
6.1 How Will the Permitting or Control Authority Establish My Limitations or Standards?
An adequate waste management program is an important ingredient of a successful
wastewater treatment system at CWT facilities. The permitting or control authority should confirm
the CWT facility's single subcategory determination by looking at a sampling of the waste receipts
at the CWT facility. The permitting or control authority will then establish the appropriate
discharge limitations or standards. Available guidance in calculating NPDES categorical
limitations for direct discharge facilities can be found in the U.S. EPA NPDES Permit Writers'
Manual (December 1996, EPA-833-B-96-003). Sources of information used for calculating Federal
pretreatment standards for indirect discharge facilities include 40 CFR Part 403.6, the Guidance
Manual for the Use of Production-Based Pretreatment Standards and the Combined Waste Stream
Formula (September 1985) (CWF Guidance), and EPA's Industrial User Permitting Guidance
Manual (September 1989).
6.2 What Compliance Options Do Facilities That Accept Wastes in a Single Subcategory Have?
CWT facilities that are subject to effluent limitations and standards for more than one
subcategory have a choice of either complying with limitations or standards determined for each
applicable subcategory or complying with a single set of limitations and standards for multiple
wastestreams. A single subcategory facility does not have a similar option and must comply with
the limitations or pretreatment standards for the applicable subcategory (i.e. a metals subcategory
must comply with the limitations (or standards) for the metals subcategory, etc.)
6.3 How Will the Permitting or Control Authority Incorporate the Cyanide Limit in the Metals
Subcategory?
Whenever a CWT facility accepts a waste stream that contains more than 136 mg/L of total
cyanide, the CWT regulation requires that the CWT facility monitor for cyanide when the
wastewater exits the cyanide destruction process rather than after mixing with other process
wastewater. Alternatively, under the regulations, the facility may monitor for compliance after
mixing if the permitting or control authority adjusts the cyanide limitations (or standards) using
the "building block approach" or "combined waste stream formula," assuming the cyanide
6-1
-------
limitations do not fall below the minimum analytical detection limit. For further information on
the "building block approach" or "combined waste stream formula", see Section 14 of
Development Document for Effluent Limitations Guidelines and Standards for the Centralized
Waste Treatment Industry - Final, (EPA 821-R-00-020, referred to herein as TDD) and the CWF
Guidance referred to in 6.1 above.
6-2
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7
MULTIPLE SUBCATEGORY FACILITIES
; PA estimates that many facilities in the CWT industry accept wastes in two or more
! subcategories (a combination of wastes in Subcategory A, B or C). This chapter describes
ohow CWT facilities that accept
wastes in more than one subcategory
may comply with the CWT rule.
7.1 What Steps Should I Take To Help
Ensure Compliance with My
Limitations or Standards?
A multiple subcategory facility accepts wastes in
more than one CWT subcategory. It is different from
the case in which metal-bearing waste streams may
include low-level organic pollutants or that oily
wastes may include low level metal pollutants due to
the origin of the waste stream accepted for treatment.
An adequate waste management program is an important ingredient of a successful
wastewater treatment system at CWT facilities. The first step in such a system is identification and
segregation of wastestreams. By identifying and segregating waste streams in different
subcategories to the extent possible, a CWT facility is more likely to ensure obtaining optimal mass
removals of pollutants from industrial wastes. Next, the CWT facility should employ treatment
technologies designed and operated to optimally treat all off-site wastes received, as appropriate.
For example, biological treatment is inefficient for treating concentrated metals waste streams like
those found in the metals subcategory or wastestreams with oil and grease compositions and
concentrations like those found in the oils subcategory. In fact, concentrated metals streams and
high levels of oil and grease compromise the ability of biological treatment systems to function.
Likewise, emulsion breaking/gravity separation, and/or dissolved air flotation is typically
insufficient for treating concentrated metals wastewaters or wastewaters containing organic
pollutants which solubilize readily in water. Finally, chemical precipitation is insufficient for
treating organic wastes and waste streams with high oil and grease concentrations. This step is
only required for facilities that elect to make an equivalent treatment determination.
Once the CWT facility is segregating its wastestreams and has appropriate treatment
technologies in place for all off-site wastes received, as appropriate, the CWT facility should make
sure it is operating its treatment technologies optimally.
Finally, simply employing appropriate technologies may not ensure compliance with the
regulations. It is equally important that the CWT facility operate these treatment technologies
effectively.
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MULTIPLE SUBCATEGORY FACILITIES CWT SMALL ENTITY COMPLIANCE GUIDE
7.2 What Compliance Options Do Facilities Have if they Accept Wastes from More Than One
Subcategory?
Multiple subcategory facilities may comply with this rule in one of two ways. Facilities
may:
1. elect to comply with the effluent limitations or standards for each applicable subcategory
directly following treatment (before commingling with different subcategory wastes); or
2. certify equivalent treatment and comply with one of the four sets of limitations or
standards for the mixed waste subcategory (Subcategory D). Each of these options is
discussed further below.
The choice of compliance is up to the CWT facility. The percentage of waste in a particular
subcategory is irrelevant to the compliance method selected by the CWT facility.
7,2.1 Comply with Limitations or Standards for Subcategory A,B or C
If a multi-subcategory CWT facility elects to comply with each applicable subcategories
limitations or standards individually, the CWT facility must monitor for compliance with each
subcategory's effluent limitations or standards prior to commingling wastestreams from different
subcategories. For example, a CWT facility may accept metal finishing rinsewaters and used oils
for treatment and recovery. In this case, the CWT facility must treat/recover the metal finishing
rinsewaters and monitor for compliance with the metals subcategory limitations (or standards) and
treat/recovery the used oil and monitor for compliance with the oils subcategory limitations (or
standards). In other words, the example facility must monitor in two separate locations for the two
different sets of subcategory limitations (or standards).
This option can be beneficial in the case of CWT facilities that have separate treatment
systems for their incoming waste receipts, for facilities that only accept a small amount of waste
in one subcategory, or facilities that do not want to
complete the paperwork required to demonstrate
equivalent treatment. However, compliance
monitoring costs for this option will be more
expensive since it requires monitoring at more than
one sample point.
Multiple subcategory CWT facilities
that comply with each subcategory's
limitations separately do not have to
demonstrate equivalent treatment.
Figure 7-1 and the example 7-1 below illustrate this option.
7-2
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MULTIPLE SUBCATEGORY FACILITIES
CWT SMALL ENTITY COMPLIANCE GUIDE
Example 7-1
Facility A accepts wastes in all three CWT subcategories with separate subcategory
treatment systems and has elected to comply with each set of pretreatment standards
separately. This facility treats 20,000 L/day of metal-bearing wastes, 10,000 L/day of oily
wastes, and 45,000, L/day of organic wastes and discharges to its local POTW.
Metals Waste
20,000 L/day
Oils Waste
10,000 L/day
Organics Waste
45,000 L/day
Metals
Treatment
Oils
Treatment
Qrganics
Treatment
Sample Point 1 Sample Point 2 Sample Point 3
Figure 7-1 Facility Accepting Waste in All Three Subcategories With Treatment in Each
For this example, the control authority establishes monitoring points 1, 2, and 3. The
control authority requires that the facility comply with the metals subcategory pretreatment
standards at Sample Point 1, the oils subcategory pretreatment standards at Sample Point
2, and the organics subcategory pretreatment standards at Sample Point 3. Note that the
specific analytes requiring compliance monitoring vary at each sampling point since the
pollutants regulated vary among subcategories.
Comply with Limitations or Standards for Subcategory D
If a multi-subcategory CWT facility elects to comply with the limitations or standards for
Subcategory D, then the permitting or control authority will establish a single monitoring point
prior to discharge and apply the appropriate set of limitations or standards from Subcategory D.
This option can be beneficial in the case of existing CWT facilities that have sequential treatment
systems or to facilities that want to monitor at a single point. For example, if a CWT facility
accepts wastes in both the metals and oils subcategory, the permitting or control authority
establishes limits or standards for Subcategory D facilities that commingle wastes from
Subcategories A and B. Examples 6-2 and 6-3 illustrate this approach. EPA notes that under this
approach, the permitting or control authority must allow a multi-subcategory facility to commingle
wastestreams prior to discharge. Also, facilities that select this compliance method must first
establish equivalent treatment as detailed in Chapter 8.
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MULTIPLE SUBCATEGORY FACILITIES
CWT SMALL ENTITY COMPLIANCE GUIDE
Example 7-2
Facility B accepts wastes in all three CWT subcategories with separate subcategory
treatment systems and has elected to comply with Subcategory D pretreatment standards
at a combined outfall. This facility treats 20,000 L/day of metal-bearing wastes, 10,000
L/day of oily wastes, and 45,000 L/day of organic wastes and discharges to its local POTW.
Metals Waste
20,000 L/day
1
Metals
Treatment
Oils Waste
10,000 L/day
i
Oils
Treatment
Monitoring
Point
Organics Waste
45,000 L/day
Organics
Treatment
Discharge
75,000 L/day
Figure 7-2 Facility Accepting Waste in All Three Subcategories With Treatment in Each and
Combined Outfall
First, the CWT facility must demonstrate equivalent treatment for
all three subcategories. The control authority then establishes a
single monitoring point. The control authority requires the facility
to comply with Subcategory D pretreatment standards for facilities
which commingle wastes from Subcategory A, B, and C.
Facilities may only
use this approach if
they establish
equivalent treatment.
7-4
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MULTIPLE SUBCATEGORY FACILITIES
CWT SMALL ENTITY COMPLIANCE GUIDE
Example 7-3
Facility C accepts waste in the oils and metals subcategory. The total volume ofwastewater
discharged to the local POTWis 100,000 liters per day. The facility segregates oils and
metals waste receipts and first treats the oils waste receipts using two stage emulsion
breaking/gravity separation and dissolved air flotation. The facility then commingles this
wastewater with metal subcategory waste receipts and treats the combined wastestreams
using primary and secondary chemical precipitation and solid/liquid separation followed by
multimedia filtration.
Metals Waste
Oils
Treatment
h- A
\
r S
Metals
Treatment
h- A
U*
r 1
Monitoring
Point
i. j
L/iscnarge
Figure 7-3 Facility Accepting Wastes in Multiple Subcategories and Treating Separately
First, the CWT facility must demonstrate equivalent treatment for the metals and the oils
subcategory. Like example 7-2, the control authority then establishes a single monitoring
point. This monitoring point follows the metals treatment. The control authority requires
the facility to comply with Subcategory D pretreatment standards for facilities which
commingle wastes from Subcategories A and B.
7.3 How Will the Permitting or Control Authority Incorporate the Cyanide Limit in the Metals
Subcategory?
Whenever a CWT facility that is a small entity accepts a waste receipt that contains more
than 136 mg/L of total cyanide, the CWT facility must monitor for cyanide when the wastewater
exits the cyanide destruction process rather than after mixing with other process wastewater.
Alternatively, the facility may monitor for compliance after mixing if permitting or control
authority adjusts the cyanide limitations using the "building block approach" or "combined waste
stream formula/' assuming the cyanide limitations do not fall below the minimum analytical
detection limit. For further information on the "building block approach" or "combined waste
stream formula", see Section 14 of the TDD. Example 7-4 illustrates this approach.
7-5
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MULTIPLE SUBCATEGORY FACILITIES
CWT SMALL ENTITY COMPLIANCE GUIDE
Example 7-4
Facility C in example 7-3 also accepts concentrated cyanide baths.
Metals Wa
with Cyaru
ste
de
' ^
Cyanide
Pretreat
k. _j
Cyanide
Monitoring
Point
k. A
>ois waste
r -^
Oils
Treatment
k, ^
vr
r 1
Metals
Treatment
i j
Efecharge
Monitoring
Point
K. ^
L^iscnargt
Figure 7-4 Facility Accepting Multiple Subcategory Wastes (including Cyanide) and Treating
Separately
In addition to monitoring for compliance with the multiple wastestream subcategory
pretreatment standards for a combination of metals and oils wastes, this facility would be
required to monitor for compliance with cyanide pretreatment standards. Alternatively, the
control authority may allow the facility to monitor for compliance with the cyanide
pretreatment standards at the monitoring point at the point of discharge if the control
authority adjusts the limit appropriately and that limit does not fall below the minimum
analytical detection limit.
7-6
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o
EQUIVALENT TREATMENT DETERMINATION
s described in Chapter 7, a CWT facility that accepts wastes in more than one CWT
subcategory may elect to comply with the appropriate set of limitations or standards for
A ; Subcategory D. A facility, however, may only elect to comply with the Subcategory D
limitations or standards if it has established that it is providing "equivalent treatment."
Providing equivalent treatment means that the facility is providing treatment for its mixed
wastewater that is designed to ensure pollutant removal that are essentially the same as would be
obtained from separate treatment of the different subcategory wastestreams. If a facility cannot
establish equivalent treatment then it must comply with each applicable subcategory's limitations
or standards individually. This chapter provides guidance to CWT facilities on how to establish
equivalent treatment.
8.1 Introduction
Before a multi-subcategory CWT facility may elect to comply with effluent limitations or
standards from Subcategory D, it must first demonstrate equivalent treatment for each applicable
subcategory. The CWT rule defines equivalent treatment as "a wastewater treatment system that
achieves comparable pollutant removals to the applicable treatment technology selected as the
basis for the limits and standards." The permitting or control authority makes the equivalent
treatment determination. The CWT facility needs to provide its permitting or control authority
with the information and data needed to make this determination. The CWT rule defines three
things a CWT facility must do to demonstrate equivalent treatment. The facility must:
1. submit an initial certification statement;
2. submit periodic certification statements; and
3. maintain on-site compliance paperwork.
Each of these requirements are discussed in more detail below.
8.2 Initial Certification Statement
8,2.1 What is an Initial Certification Statement?
The initial certification statement is a written
submission from a CWT facility to the appropriate
permitting authority certifying that its treatment train
includes all applicable equivalent treatment systems. It
The initial certification
statement should be signed by
the same person who signs the
. , . j , ., .-., ,,. compliance status reports.
must be signed by the responsible corporate officer as r r
8-1
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EQUIVALENT TREATMENT DETERMINATION CWT SMALL ENTITY COMPLIANCE GUIDE
defined in 40 CFR 403.12(1) or 40 CFR 122.22. It should also be kept on file at the CWT facility as
part of the required on-site compliance paperwork.
3,2.2 When Does the Facility Have to Submit the Initial Certification Statement?
The CWT facility must notify its permitting or control authority of its desire to be subject
to Subcategory D limitations or
standards by submitting an initial
certification statement. Table 8-1
outlines when CWT facilities must
submit an initial certification statement.
EPA suggests that an indirect CWT facility planning to
comply with the multiple wastestream subcategory
standards notify its control authority of this intent and
also state, based on its BMR submission, whether it can
or cannot comply with the standards currently.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Table 8-1 Initial Certification Dates
....._ _, . ... i^ L-C: ^ ct t IT^ t Submission Must Be
Type of CWT Faculty Required Initial Certification Statement Date ,, ,
yv y ^ Made to:
Existing Direct Discharger at the time of permit renewal or modification NPDES permit writer
Existing Indirect Discharger prior to December 22, 20031 control authority
New Direct Discharger at the time of submitting its application for NPDES permit writer
permit
New Indirect Discharger at the time of submitting its application for an control authority
individual control mechanism
8.2,3 What Does a CWT Facility Have to Include in an Initial Certification Statement?
The CWT rule requires the initial certification to include three items:
1. A list and description of the subcategories of wastes accepted for treatment at the CWT
facility;
2. A list and description of the treatment systems at the CWT facility and the conditions under
which the treatment systems are operated for the subcategories of wastes accepted for
treatment; and
3. Information and supporting data establishing that these treatment systems will achieve
equivalent treatment.
The following sections provide guidance to small entities that are CWT facilities on how
EPA envisions these materials should be submitted.
facilities need to submit the initial certification to their control authorities well in
advance of this date to ensure multiple wastestream pretreatment standards are in effect by
this date.
8-2
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EQUIVALENT TREATMENT DETERMINATION CWT SMALL ENTITY COMPLIANCE GUIDE
1: List and description of the subcategories of wastes accepted for treatment at the facility
While not required, CWT facilities may use the guidance provided in Chapter 5 to aid in
determining what subcategories of wastes are accepted for treatment/recovery at the facility. The
list of wastes accepted for treatment at the facility may be general (i.e., landfill leachate, used oil,
metal finishing wastewater) or may be more specific (i.e., broken down by RCRA codes or waste
codes). Based on information collected by EPA during development of this rule, CWT facilities
already collect this type of information as part of their waste acceptance procedures. Table 8-2 is
an example of the type of information EPA envisions facilities submitting to document the wastes
accepted for treatment at the facility.
Table 8-2 Types of Wastes Accepted at Acme CWT
oils subcategory metals subcategory
used oil spent electroplating sludges
lubricants metal finishing rinse waters
coolants waste acids or bases with metals
oil-water emulsions
non-contact used glycols
2: A list and description of the treatment systems at the facility and the conditions under which the
treatment systems are operated for the subcategories of wastes accepted for treatment
The facility should provide information on the treatment systems for each subcategory
identified in Step 1 above. This should include a listing of each treatment technology step that will
be used (not which is present at the facility) to treat the wastestreams. In EPA's view, this should
include a flow diagram of each treatment system as well as a written discussion. This written
discussion should include pertinent information on the operation of each treatment step such as
the type of treatment chemicals included in a chemical precipitation step. Figure 8-1 is an example
of the level of detail envisioned by EPA.
8-3
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EQUIVALENT TREATMENT DETERMINATION
CWT SMALL ENTITY COMPLIANCE GUIDE
M EMORANDUM
July 1, 20XX
FROM: Jane Doe, Plant Supervisor, Acme CWT
TO: Pretreatment Coordinator, City POTW
SUBJECT: Equivalent Treatment Determination for CWT Regulation
The Acme CWT facility treats both oils and metals subcategory wastes. As illustrated below,
some oily wastewater is sent directly to oil/water separation tanks where gravity oil/water separation
occurs. Others do not separate efficiently using gravity alone and are transferred to the emulsion breaking
tank where heat and/or treatment chemicals may be added to break the emulsions. The temperature and
treatment chemicals vary depending on the emulsion being treated. Treatment chemicals may include
polymer, sulfuric acid, and/or alum. The resulting wastewater from the oil/water separation phase is
then treated by dissolved air flotation. The DAF system consists of a 3,000 gallon slow-mix tank, a DAF
unit, chemical mix tanks, metering pumps for each chemical, and in-line mixers. The treatment chemicals
added to the DAF vary depending on the wastewater being treated and may include polymer or caustic.
The total detention time of the DAF system is 50 to 100 minutes. Wastewater from the DAF is then
commingled with treated metals subcategory wastewater for final discharge.
Metals subcategory wastewaters are treated in a system which consists of primary and secondary
metals precipitation. Primary precipitation treatment occurs in the primary treatment tanks where lime is
added. The precipitation is carried out at ambient temperatures with pH ranging from 8 to 9.5. Caustic or
waste sulfuric acid may also be added to maintain pH. Other chemicals such as sodium sulfide or
potassium permanganate may also be added. The resulting wastewater is then sent to a clarifier.
Following clarification, the wastewater is processed through a second precipitation step. Once again the
precipitation is carried out at ambient temperatures and the pH varies depending on the specific metals
being removed from the wastewater. Treatment chemicals may include caustic, sulfuric acid, lime, or
ferric chloride. The resulting wastewater is then clarified and commingled with treated oils subcategory
wastewater.
Non-Emulsified
Oils Waste
Emulsified
Oils Waste
Emulsion
Breaking
Gravity
Separation
Dissolved
Air Flotation
Metals
Waste
Primary
Chemical
Precipitation
Clarification
Secondary
Chemical
Precipitation
Clarification
Figure 8-1 Sample Memorandum for Equivalent Treatment Determinations
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EQUIVALENT TREATMENT DETERMINATION
CWT SMALL ENTITY COMPLIANCE GUIDE
3: Information and supporting data establishing that these treatment systems will achieve equivalent
treatment.
The CWT rule defines equivalent treatment as a "wastewater treatment system that
achieves comparable pollutant removals to the applicable technology selected as the basis for the
limitations and pretreatment standards. Comparable removals may be demonstrated through
references in technical and engineering treatises, journals or other literature, treatability tests, or
self-monitoring data." The most common measurement of pollutant removals is percent removal
which measures the amount of contaminant removed from the wastestream. Calculation of percent
removals is discussed in more detail in Chapter 7 of the technical development document and is:
(MASS^^t - MASSeffluent)/MASStafluent. EPA calculated
the percent removals for each regulated pollutant using
the data included for developing the limitations and
standards in each subcategory. Tables 8-3 and 8-4 show
these pollutant removals. CWT facilities can use the
information in these tables to compare the pollutant
removals achieved by their selected technologies to
EPA's technology basis.
The treatment technologies selected
as the basis for the limitations and
pretreatment standards are listed in
Table 3-1 in Chapter 3.
Table 8-3 Removal Efficiencies for Indirect Discharging CWT Treatment Systems
Oils Subcategory
Pollutant Parameter
CLASSICALS
Total Cyanide
METALS
Antimony
Arsenic
Barium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Molybdenum
Nickel
Selenium
Silicon
Oils Subcat.
Existing
Source
Removal (%)
64.38
87.99
57.64
91.91
88.07
80.54
52.20
91.09
92.64
77.43
53.73
41.24
36.94
54.16
Oils Subcat.
New
Source
Removal (%)
64.38
87.99
57.64
91.91
88.07
86.24
52.20
90.02
88.26
77.43
53.73
41.24
36.94
54.16
Metals Subcategory
Pollutant Parameter
CLASSICALS
Hexavalent Chromium
Total Cyanide
METALS
Antimony
Arsenic
Cadmium
Chromium
Cobalt
Copper
Iridium
Lead
Lithium
Mercury
Molybdenum
Nickel
Selenium
Metals Subcat.
Existing & New
Source
Removal (%)
98.01
99.30
94.30
91.74
99.97
99.91
98.47
99.91
99.69
99.95
66.83
98.38
26.40
99.59
57.54
Organics Subcategory
Pollutant Parameter
CLASSICALS
Total Cyanide
METALS
Antimony
Cobalt
Copper
Molybdenum
Silicon
Strontium
Zinc
ORGANICS
2-butanone
2-propanone
2,3-dichloroaniline
2,4,6-trichlorophenol
Organics Subcat.
Existing &
New Source
Removal (%)
33.46
33.27
17.31
38.04
57.10
4.71
59.51
60.51
69.20
68.57
80.45
45.16
8-5
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EQUIVALENT TREATMENT DETERMINATION
CWT SMALL ENTITY COMPLIANCE GUIDE
Table 8-3 Removal Efficiencies for Indirect Discharging CWT Treatment Systems
Oils Subcategory
Pollutant Parameter
Strontium
Tin
Titanium
Zinc
ORGANICS
2-Butanone
4-chloro-3-methylphenol*
Acenapthene
Alpha-terpineol
Anthracene
Benzo (a) anthracene
Benzole acid
Bis(2-
Butyl benzyl phthalate
Carbazole
Chrysene
Diethyl phthalate
Fluoranthene
Fluorene
n-Decane
n-Docosane
n-Dodecane
n-Eicosane
n-Hexadecane
n-Octadecane
n-Tetradecane
o-cresol*
p-cresol*
Phenol
Pyrene
Pyridine
Oils Subcat.
Existing
Source
Removal (%)
50.68
90.77
89.99
80.33
15.41
-
96.75
94.77
97.07
94.38
6.54
93.22
92.19
81.09
96.93
77.01
96.24
95.32
97.36
97.25
94.14
95.88
97.38
97.32
97.26
-
-
53.68
97.10
21.45
Oils Subcat.
New
Source
Removal (%)
50.68
90.77
89.99
83.48
15.41
27.48
96.75
94.77
96.67
95.69
19.32
93.66
92.19
81.09
97.22
63.97
95.21
92.86
94.98
96.87
96.50
95.54
96.53
97.20
96.85
21.08
34.88
14.88
97.63
21.45
Metals Subcategory
Pollutant Parameter
Silicon
Silver
Strontium
Tin
Titanium
Vanadium
Yttrium
Zinc
Zirconium
ORGANICS
2-Butanone
2-Propanone
Benzole Acid
n,n-
Dimethylformamide
Pyridine
Metals Subcat.
Existing & New
Source
Removal (%)
98.58
99.62
95.89
99.94
99.84
99.46
95.39
99.93
42.13
74.72
65.62
82.99
54.81
48.49
Organics Subcategory Organics Subcat.
Pollutant Parameter Existing &
New Source
Removal (%)
Acetophenone 92.44
Aniline 92.88
Benzole Acid 94.29
n,n- 89.26
Dimethylformamide
o-Cresol 98.39
p-Cresol 85.38
Pentachlorophenol 23.19
Phenol 87.08
Pyridine 61.69
' Not applicable for Existing Sources
8-6
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EQUIVALENT TREATMENT DETERMINATION
CWT SMALL ENTITY COMPLIANCE GUIDE
Table 8-4 Removal Efficiencies for Direct Discharging CWT Treatment Systems
Oils Subcategory
Pollutant Parameter
CLASSICALS
Total Cyanide
METALS
Antimony
Arsenic
Barium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Molybdenum
Nickel
Selenium
Silicon
Strontium
Tin
Titanium
Zinc
ORGANICS
2-Butanone
4-chloro-3-
metnylpnenol*
Acenapthene
Alpha-terpineol
Anthracene
Benzo (a) anthracene
Benzole acid
Bis(2-ethylhexyl)
phthalate
Butyl benzyl phthalate
Carbazole
Chrysene
Diethyl phthalate
Fluoranthene
Fluorene
n-Decane
n-Docosane
n-Dodecane
n-Eicosane
n-Hexadecane
n-Octadecane
n-Tetradecane
o-cresol*
Oils Subcat.
Existing &
New Source
Removal (%)
64.38
87.99
57.64
91.91
88.07
86.24
52.20
90.02
88.26
77.43
53.73
41.24
36.94
54.16
50.68
90.77
89.99
83.48
15.41
27.48
96.75
94.77
96.67
95.69
19.32
93.66
92.19
81.09
97.22
63.97
95.21
92.86
94.98
96.87
96.50
95.54
96.53
97.20
96.85
21.08
Metals Subcategory
Pollutant Parameter
CLASSICALS
Hexavalent Chromium
Total Cyanide
METALS
Antimony
Arsenic
Cadmium
Chromium
Cobalt
Copper
Iridium
Lead
Lithium
Mercury
Molybdenum
Nickel
Selenium
Silicon
Silver
Strontium
Tin
Titanium
Vanadium
Yttrium
Zinc
Zirconium
ORGANICS
2-Butanone
2-Propanone
Benzole Acid
n,n-Dimethylformamide
Pyridine
Metals Subcat.
Existing Source
Removal (%)
98.01
99.30
94.30
91.74
99.97
99.91
98.47
99.91
99.69
99.95
66.83
98.38
26.40
99.59
57.54
98.58
99.62
95.89
99.94
99.84
99.46
95.39
99.93
42.13
74.72
65.62
82.99
54.81
48.49
Metals Subcategory
Pollutant Parameter
CLASSICALS
TSS
METALS
Antimony
Arsenic
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Tin
Titanium
Vanadium
Zinc
Metals Subcat.
New Source
Removal (%)
99.97
99.76
99.87
99.98
99.98
99.76
100.00
99.79
99.89
40.11
99.86
94.33
99.61
99.89
99.78
98.95
99.99
Organics
Subcategory
Pollutant Parameter
CLASSICALS
Total Cyanide
METALS
Antimony
Cobalt
Copper
Molybdenum
Silicon
Strontium
Zinc
ORGANICS
2-butanone
2-propanone
2,3-dichloroaniline
2,4,6-trichlorophenol
Acetophenone
Aniline
Benzole Acid
n,n-
Dimethylform amide
o-Cresol
p-Cresol
Pentachlorophenol
Phenol
Pyridine
Organics Subcat.
Existing &
New Source
Removal (%)
33.46
33.27
17.31
38.04
57.10
4.71
59.51
60.51
69.20
68.57
80.45
45.16
92.44
92.88
94.29
89.26
98.39
85.38
23.19
87.08
61.69
8-7
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EQUIVALENT TREATMENT DETERMINATION
CWT SMALL ENTITY COMPLIANCE GUIDE
Table 8-4 Removal Efficiencies for Direct Discharging CWT Treatment Systems
OilsSubcategory OilsSubcat.
Pollutant Parameter Existing &
New Source
Removal (%)
p-cresol* 34.88
Phenol 14.88
Pyrene 97.63
Pyridine 21 .45
Metals Subcategory Metals Subcat.
Pollutant Parameter Existing Source
Removal (%)
Metals Subcategory Metals Subcat.
Pollutant Parameter New Source
Removal (%)
Organics Organics Subcat.
Subcategory Existing &
Pollutant Parameter New Source
Removal (%)
For the Acme CWT facility described in Figure 8-
1 above, the facility could simply state that it uses the
same treatment technologies selected as the basis for the
limitations and standards for the oils and metals
subcategory, and has therefore demonstrated equivalent
treatment. However, a CWT facility does not need to
use the treatment systems selected as the basis of the
limitations and
An evaluation of equivalent
treatment should focus on
effective treatment of each
subcategory's wastes in the
treatment train. The goal is not to
evaluate combined wastestreams
from different subcategories.
EPA included this
requirement so that pollutant
reductions would be through
treatment rather than dilution.
standards to demonstrate equivalent treatment. As defined,
equivalent treatment may be demonstrated through
literature studies, treatability tests, or self-monitoring data,
or a combination of these. Each of these are discussed
further below.
The National Risk Management
Research Laboratory's (NRMRL)
Treatability Database can be accessed
on-line: www.epa.gov/tdbnrmrl
Demonstrate equivalent treatment through literature
Effective treatment technologies can be
identified through a variety of sources including
technical literature, treatability databases, and
treatment vendors. Treatability testing on similar
wastewaters may provide clues on how to effectively
treat a particular wastewater. Treatment technology
vendors should have information on the capabilities of their treatment systems. A CWT facility
may use information from any of these sources, if available, to demonstrate that a particular
treatment system will achieve comparable removals to EPA's model technologies. This option may
be particularly useful if a facility has actual removal data for a particular technology for some
regulated pollutants and not others, but can demonstrate through literature sources that the
pollutants should be treated in a similar manner.
Demonstrate equivalent treatment through treatability tests
Literature sources are a good method for evaluating various treatment technologies, but
treatability tests may also be required to demonstrate that a particular technology has comparable
removals to the model technologies selected as the basis for the rule. For example, a facility may
have literature information that carbon adsorption is effective for the removal of n-dodecane, but
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EQUIVALENT TREATMENT DETERMINATION CWT SMALL ENTITY COMPLIANCE GUIDE
does not have information on n-decane. Because these chemicals have similar structures, one
would expect them to behave similarly. However, a treatability test would provide the CWT
facility with the additional data which confirm the equivalent treatment demonstration.
Many CWT facilities already perform treatability tests to obtain optimum pollutant
removals and identify alternative treatment schemes. A treatability test may also allow a facility
to identify surrogate parameters that may be used on an on-going basis to demonstrate equivalent
treatment.
When conducting a treatability test, facilities may only test the individual treatment unit
operations. However, if a facility intends to implement an entire treatment train, testing the entire
train may reveal important information about how the wastewater characteristics change with each
treatment step. Testing the wastewater through the entire treatment train can help troubleshoot
the system and determine whether pretreatment steps are adequate to prevent malfunctioning of
other unit operations in the treatment train.
It is not always necessary to treat a large volume of wastewater in treatability tests, and
often valuable information can be acquired from smaller scale tests. Treatability tests are typically
categorized based on size as bench-, pilot- and full-scale test. A bench scale test is typically used
to screen treatment technologies or determine initial design and operating parameters, and is
typically conducted on one gallon or less of wastewater. Bench scale tests use laboratory
equipment (for example, beakers, hot plates, and stirring rods) and may be conducted on synthetic
wastewater (that is, distilled water spiked with a known concentration of contaminants). A bench
scale test requires less cost and effort because of the smaller volume of wastewater tested and the
basic equipment used. In addition, a bench scale treatability test may involve less sophisticated
sampling and analysis, and may use indicator parameters or visual appearance of the wastewater
instead of laboratory analysis to gauge test results.
A pilot scale test is conducted on actual wastewater, and is typically used to optimize
design and operating parameters and to troubleshoot treatment problems before constructing a
full-scale treatment system. Actual wastewater may contain surfactants, chelates, or impurities that
may interfere with treatment. The test is generally intermediate in size. Pilot scale tests typically
use smaller and simpler equipment than would be found in a full scale system, such as buckets and
drums instead of treatment tanks. These systems may also use temporary equipment that can be
disposed of after the test instead of permanently installed.
A full scale treatability test is conducted on actual wastewater using the actual size and type
of equipment to be used for routine treatment.
If a CWT facility elects to demonstrate equivalent treatment through treatability tests, it
needs to submit a detailed description of its treatability tests as well as the results. The detailed
description should include the type of treatability test and the parameters used for evaluation.
Operating parameters and information on the wastes treated should also be submitted. Figure 8-2
is an example of a treatment test summary that may be submitted as part of an equivalent
treatment demonstration. The example shows treatability tests using oils subcategory wastes.
8-9
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EQUIVALENT TREATMENT DETERMINATION
CWT SMALL ENTITY COMPLIANCE GUIDE
Facility:
Date:
Location:
Prepared by:
Insert your optimal treatment train and operating parameters in the space provided below:
Sulfuric
1 and Poly
Addition
V K
' IX*
Oils Waste
Technology
Acid Caustic and
mer |"| Lime Addition
II
Emulsion ^7
T = 60 deg C
24 hour settling time
Chemical
& Settling
PI pH adju
rx,
\^
pH=9
T = 25 deg C
1 hour detention time
stment
Carbon
i ^
pH=7
T = 25 deg C
flow rate = 87 mL/i
empty lied residenc
Pollutant pH Temp, Treat Constituent
deg. C Time Concentration
Influent Effluent
(mg/L) (mg/L)
Emulsion
breaking
Single stage
precipitation
Carbon
n-decane
carbazole
fluoranthene
chromium
chromium
n-decane
carbazole
fluoranthene
2 60 24 hr. 1,000 700
2 60 24 hr. 2500 2000
2 60 24 hr. 3,000 2,000
2 60 24 hr. 230 150
9 25 Ihour 150 1
7 25 15min 700 10
7 25 15min 2000 20
7 25 15min 2000 40
Treated
Effluent
nin
° time = 15 min
Test CWT
% BAT
Rem %
Rem
30.0
20.0
33.3
34.8
99.3
98.6
99.0
98.6
Figure 8-2 Sample Treatment Test Summary
For the parameters listed, this information indicates that the treatment systems evaluated
achieve comparable removals to the treatment systems selected as the basis for the CWT limitations
and pretreatment standards. Alternatively, if a treatment technology only removes 30 percent of
a parameter, but that parameter is removed to below its detection limit or to the required discharge
limits or standards, this would also demonstrate comparable removals.
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EQUIVALENT TREATMENT DETERMINATION CWT SMALL ENTITY COMPLIANCE GUIDE
Self Monitoring Data
The CWT facility may also provide the permitting or control authority with self-monitoring
data to establish equivalent treatment. This is essentially the same as conducting a full-scale
treatability test discussed above. It is important to remember that this self-monitoring data must
demonstrate equivalent treatment for each individual subcategory and should not include
commingled wastewater from different subcategories or non-CWT wastewater such as stormwater.
The information submitted should be similar to that submitted for treatability tests and should
include a summary table similar to Table 8-3. Self-monitoring data from the treatment system as
employed on actual waste receipts is the most fool-proof method for demonstrating equivalent
treatment.
8.3 Periodic Certification Statement
What Is a Periodic Certification Statement?
The periodic certification statement is a written submission to the permitting or control
authority that certifies the facility is operating its treatment systems to provide equivalent
treatment as set forth in its initial certification. In the event that the facility has modified its
treatment systems, it must also include a justification to allow modification of the practices listed
in its initial certification. The rule provides that the statement must be signed by the appropriate
manager in charge of overall operations at the site to ensure that information provided is true,
accurate, and complete to the best of his/her knowledge. Again, this manager should be the same
person who signs compliance status reports required by 40 CFR 403.12(1) or 40 CFR 122.22. The
periodic certification statements should also be kept on file at the facility as part of the required on-
site compliance paperwork.
8,3.2 When Does a CWT Facility Have to File the Periodic Certification Statement?
The CWT rule requires the CWT facility to submit a periodic certification statement once
per year. The permit writer or control authority should determine the required month of
submission of the periodic certification statement and include this in the facility's discharge permit
or control mechanism.
What Information Should Be Included in the Periodic Certification Statement?
If the information contained in the initial certification statement is still applicable, including
information on the subcategory type for wastes accepted for treatment, a facility shall simply state
that in a letter to the permit writer or control authority, and the letter shall constitute the periodic
statement. However, if the facility has modified its treatment system or the subcategories of wastes
accepted for treatment, it shall submit the revised information in a manner similar to the initial
certification. In EPA's view, a modification is a change in treatment technology or a major change
in operation. A CWT facility accepting different types of wastes within the same subcategory
previously identified is not a major modification. EPA understands that CWT facilities may change
operating parameters as needed depending on the waste being treated. In EPA's view, a major
change in operating parameters (such as pH, temperature, etc.) is one that is not listed in the
original certification that may reduce the effectiveness of the treatment. Similarly, a change in the
treatment technology is any significant technology change that may reduce the effectiveness of the
overall treatment system. For example, it would not include the addition of a mixer to an existing
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CWT SMALL ENTITY COMPLIANCE GUIDE
technology, but would include removing/changing an entire treatment step in a treatment train.
An example of a periodic certification statement in shown in Figure 8-3.
ACME CWT
1234 Main Street
Anytown, VA 12345
March 1, 20XX
Anytown POTW
1 Main Street
Anytown, VA 12345
Dear Sir/Madam:
Please be advised that our facility located at 1234 Main Street still accepts wastes in
both the CWT oils and metals subcategories. The information in our original certification
remains the same except that we now occasionally add a polymer to the DAF system. This
has not reduced the effectiveness of the system.
Please feel free to contact me at (703) 555-5555 if you have any questions or
comments about this additional treatment chemical.
Sincerely,
John Doe
President
Figure 8-3 Sample Periodic Certification Statement
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8.4 On-Site Compliance Paperwork:
What Materials Must Be Included with the On-site Paperwork?
The CWT rule requires the following materials be included as part of the on-site paperwork:
1. A general list and description of the subcategory wastes being accepted for
treatment/recovery at the facility;
2. A list and description of the treatment systems at the facility and the conditions under
which the treatment systems are operated for the subcategories of wastes accepted for
treatment;
3. Information and supporting data establishing that these treatment systems will achieve
equivalent treatment.
4. A description of the procedures it follows to ensure that its treatment systems are well
operated and maintained; and
5. An explanation of why the procedures it has adopted will ensure its treatment system are
well-operated and maintained.
The first three items are included in the initial certification and periodic certification
statements. Therefore, the CWT facility should keep these certifications on file. Items 4 and 5 are
discussed in more detail below.
Treatment System Operation and Maintenance
CWT facilities that comply with Subcategory D limitations or standards must also choose
a method to demonstrate that their treatment system(s) are well operated and maintained. This
method should be stated and the rationale for choosing it should be discussed in the on-site
compliance paperwork, such as an environmental management system (EMS).
Proper operation and maintenance of a system includes a qualified person to operate the
system, use of correct treatment chemicals in appropriate quantities, and operation of the system
within stated design parameters (for example, temperature and pressure). Basically, the CWT
facility should keep records of its operating parameters for its treatment systems. Based on
information EPA collected during the development of this rule, most CWT facilities already
maintain these records on-site. For example, the CWT facility should keep records on the amount
and type of chemicals added to each step of its treatment systems. The facility should also
document flow rates and recycle rates on a regular basis (or whenever possible). Additionally,
facilities operating systems that require periodic maintenance (such as multimedia filters or carbon
adsorption systems) should keep records on this aspect of treatment system operation.
Alternatively, a facility could also monitor for specific parameters or a surrogate parameter. For
example, a facility may operate dissolved air flotation. The method for demonstrating that the
dissolved air flotation system is well operated can be as simple as maintaining records on the
temperature and pH, the chemicals added (including quantity), the duration of treatment, recycle
ratio, and physical characteristics of the wastewater before and after dissolved air flotation.
Conversely, the facility could monitor for selected parameters for the purpose of demonstrating
effective treatment. This could include any pollutant or a combination of pollutants. A CWT
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facility should work with its permitting or control authority to determine whether its current EMS
or alternative method for demonstrating that its treatment system(s) are well operated and
maintained
EPA notes that permitting or control authorities may inspect the CWT facility at any time
to confirm that the listed practices are being employed, that the treatment system is well operated
and maintained, and that the necessary paperwork provides sufficient justification for any
modifications.
8.5 Additional Considerations Permitting and Control Authorities May Use in Confirming
Equivalent Treatment Determinations
Permitting and control authorities will evaluate and review certification statements and
on-site compliance paperwork from CWT facilities for conformity with the rule requirements.
Factors that may influence their decisions include previous experience with the CWT facility, the
CWT facility management's commitment to program implementation, and the thoroughness and
accuracy of the supporting documentation.
One area subject to interpretation is the determination of treatment system equivalency.
When reviewing treatment system performance data, the permitting or control authority will likely
review the source of data, the time period during which it was collected, and the type of data
collected.
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9
COMPLIANCE ASSURANCE PROCESS
.his chapter explains how EPA will determine compliance with the CWT rule, what happens
if you or EPA discovers noncompliance, and the legal status of this guide.
9.1 How Will EPA Determine Compliance With the CWT Rule
EPA uses several approaches to monitor compliance with its environmental regulations,
including methods initiated by EPA and by facilities.
A.
Compliance
Monitoring -
B. Reporting -
Each discharge permit or individual control mechanism includes
compliance monitoring requirements. These requirements typically specify
the frequency of monitoring required as well as the individual parameters
to be monitored and their respective discharge limits. Most permits (or
control mechanisms) include limits for the daily maximum and the monthly
average. The compliance monitoring must demonstrate that the discharge
complies with both.
The permitting or control authority will monitor reports submitted by the
facility including discharge monitoring reports and periodic certification
statements. These are the key means by which your compliance will be
evaluated.
C.
Inspections - Permitting authorities, control authorities, or EPA may conduct periodic
inspections at facilities subject to this regulation. Inspections may be
initiated by disclosures, random selection, or a variety of other targeting
methods. Inspections may be used to evaluate operations, records, or other
information at the facility. This will be an important component in assuring
equivalent treatment at facilities which have elected this option.
D.
Self
Disclosure -
The CWT facility has the primary responsibility for ensuring that its
wastewater discharge complies continuously with its numerical discharge
requirements and, if applicable, its equivalent treatment demonstration.
EPA encourages CWT facilities to take advantage of EPA's self disclosure
policies or small business policy.
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9.2 If I Discover a Violation, How Can I Work with EPA to Correct It?
EPA encourages self-disclosure of violations and has implemented two policies to meet this
goal. These policies meet the objectives of Section 223 of the Small Business Regulatory
Enforcement Fairness Act of 1996 (SBREFA), which provides for the reduction, and, under some
appropriate circumstances, the complete waiver of civil penalties for certain environmental
violations. The policies are:
! Small
Business Policy - The "Policy on Compliance Incentives for Small Businesses" applies to
companies with 100 or fewer employees and provides penalty waivers or
penalty reductions as incentives to participate in an on-site compliance
assistance program and to conduct self-audits to discover and correct
violations.
! Audit Policy - The "Incentives for Self-Policing: Disclosure, Correction, and Prevention of
Violations" policy applies to businesses of all sizes that meet the
applicability criteria and promptly disclose and correct violations.
9.3 If EPA Discovers a Violation, What Might EPA's Response Be?
To maximize compliance, EPA implements a balanced program of compliance assistance,
compliance incentives, and traditional law enforcement. EPA knows that CWT facilities owned
by small businesses that must comply with complicated new statutes or rules often want to do the
right thing, but may lack the requisite resources. Compliance assistance information and technical
advise helps small businesses to understand and meet their environmental obligations.
Compliance incentives, such as our Small Business Policy, encourage persons to voluntarily
discover, disclose, and correct violations before they're identified by the government. EPA's strong
law enforcement program protects all of us by targeting persons who neither comply nor cooperate
to address their problems.
EPA uses a variety of methods to determine whether businesses are complying, including
inspecting facilities, reviewing records and reports, and responding to citizen complaints. If we
learn a person is violating the law, EPA (or State, if the program is delegated) may file an
enforcement action seeking penalties of up to $27,500 per violation, per day. The proposed penalty
in a given case will depend on many factors, including the number, length, and severity of the
violations, the economic benefit obtained by the violator, and its ability to pay. EPA has policies
in place to ensure penalties are calculated fairly. These policies are available to the public. In
addition, any company with a violation has the right to contest EPA's allegations and proposed
penalty before an impartial judge or jury.
In summary, EPA recognizes that we can achieve the greatest possible protection by
encouraging small businesses to work with us to discover, disclose, and correct violations. That's
why we've issued self-disclosure, small business, and small community policies to eliminate or
reduce penalties for small and large entities which cooperate with EPA to address compliance
problems. In addition, we've established compliance assistance centers to serve over a million
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small businesses. For more information on these and other EPA programs for small business,
please contact EPA's Small Business Ombudsman, Karen Brown, at (202) 260-1390 or e-mail at
brown.karen@epa.gov.
9.4 What is the Legal Status of This Guide?
A judge may review a compliance or implementation guide in determining what penalty
is appropriate and reasonable, although the content of the guide cannot otherwise by reviewed by
the court.
In this Compliance Guide, we have tried to make clear what you must do to comply with
the applicable law and regulation. This is the minimum required by SBREFA. You'll notice,
however, that here and there we have also included suggestions for alternative approaches that
may make compliance easier and possibly even reduce costs. We hope you find this presentation
of regulatory requirements useful and the additional information helpful in reaching and
maintaining compliance.
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1 0
QUESTIONS AND ANSWERS
I rI -j'his chapter provides questions commonly asked during development of this rule and EPA's
j responses This information may serve to answer many questions which small entities may
.v! - have about the CWT rule.
10.1 General
Ql. How many facilities are covered under the scope of this rule? How many discharge
wastewater?
Al. EPA estimates there are 223 centralized waste treatment facilities in the U.S., 165 of which
discharge wastewater.
Q2. My facility is a CWT, but it does not discharge wastewater. All wastewaters are shipped
off-site to another CWT. Do I need to meet the CWT discharge requirements prior to
shipping the wastewater off-site?
A2. The CWT rule applies to CWT facilities that discharge wastewater to surface waters or to
POTWs. This facility does neither and is not required to meet the CWT discharge
requirements before shipping the wastewater to another CWT.
Q3. Does the CWT rule include a de minimis exemption?
A3. No, the CWT rule does not include a de minimis exemption.
10.2 Applicability
Ql. My facility accepts wastes from off-site, but we are not a treatment facility. RCRA classifies
us as a recycling facility. Are we subject to the CWT rule?
Al. The CWT rule is not limited to facilities that perform treatment only. In general,
wastewater discharges from facilities that accept wastes from off-site for recycling are
subject to the CWT rule. However, wastewater discharges from some specific recycling
activities (such as solvent recovery) are not subject to the rule. Therefore, a recycler should
consult the applicability section of the rule for more information on its specific recycling
activity. If information is not included on its specific recycling activity, then its discharges
associated with these acetifies are subject to this rule.
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Q2. My facility only treats and discharges non-hazardous wastes. Is it subject to the CWT rule?
A2. The CWT rule applies to both hazardous and non-hazardous wastes. It does not
differentiate based on the RCRA status of the wastes accepted for treatment.
Q3. My facility discharges wastewaters generated in the treatment of solid wastes received from
off-site. Since the off-site wastes are not liquid, is the wastewater generated subject to the
CWT rule?
A3. The CWT rule applies to wastewater discharges associated with the treatment and/or
recovery of solid wastes, wastewater and used materials received from off-site.
Q4. My local POTW is my biggest competitor. Are POTWs subject to the CWT rule?
A4. POTWs are not CWT facilities and are not subject to the CWT rule. However, wastes that
are hauled, piped or shipped by rail to POTWs must comply with applicable pretreatment
standards and requirements, including categorical standards.
Q5. I only accept non-industrial wastes (that is, sanitary wastes) from off-site. Am I a CWT
facility?
A5. No, the CWT rule only applies to discharges of industrial wastewaters. EPA does not
consider sanitary wastewater to be industrial.
Q6. Are scrap metal yards and municipal waste transfer stations considered CWT facilities?
A6. No, scrap metal yards and municipal waste transfer stations are not subject to the CWT
rule.
Q7. Is there a SIC Code which identifies the CWT industry?
A7. There is no SIC Code for the CWT industry. However, many CWT facilities have identified
themselves with the SIC code for "Refuse systems," 4953.
10.3 Pollutants Selected for Regulation
Ql. My facility's permit does not currently limit all of the pollutants regulated in this rule.
How did you select the regulated pollutants?
Al. EPA did not restrict its list of pollutants considered for regulation to the list of pollutants
limited in current permits. EPA examined data from influent wastewater samples collected
at many CWT facilities to determine the list of pollutants considered for regulation. Chapter
6 of the technical development document provides information on the methodology EPA
used to establish the pollutants considered for regulation and Chapter 7 of the technical
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QUESTIONS AND ANSWERS CWT SMALL ENTITY COMPLIANCE GUIDE
development document details EPA's decisions on which of these pollutants were selected
for regulation.
Q2. I discharge to a POTW and the regulated pollutants do not cause problems with my POTW.
Why do I have to monitor for these pollutants?
A2. The objective of the Clean Water Act is to "restore and maintain the chemical, physical, and
biological integrity of the Nation's waters." In order to achieve this objective, the CWA
establishes as a national goal the elimination of the discharge of all pollutants into the
nation's waters. Congress mandated EPA to establish pretreatment standards that are
equivalent to standards for direct dischargers. These limitations for direct dischargers are
based on effluent reductions that can be achieved by best available technology
economically achievable (BAT)). However, Congress further mandated that EPA consider
and recognize the treatment capability and performance of the POTW in controlling
discharges for indirect dischargers. Consequently, EPA evaluated which pollutants to
regulate for indirect dischargers by comparing removals of the pollutants regulated for
direct dischargers with POTW removals to determine whether they "pass through" the
POTW to surface waters. All pollutants regulated for indirect dischargers were determined
to pass-through in EPA's assessment. This pass-through assessment is detailed further in
Chapter 7 of the final technical development document and in the preamble to the final
rule.
Subcategorization Procedure
Ql. Who is responsible for determining the proper subcategories? The CWT facility or the
permit writer or control authority?
Al. EPA believes the CWT facility is in the best position to classify waste receipts into the
proper subcategory. For indirect dischargers, this responsibility is even clearer, as
categorical standards are self-implementing and do not depend necessarily on issuance of
a permit.
Q2. My facility mainly accepts used oils. Occasionally, we also accept landfill leachate. The
leachate represents no more than 5% of the volume of waste discharged when present.
Based on your recommended Subcategorization procedure, our facility would be classified
as an oils and organics facility. However, since the leachate is only periodic and such a
small percent of the wastewater discharged, can we simply classify ourselves as an oils
facility?
A2. No, your facility is both an oils and an organics facility. During development of this rule,
EPA considered an option for facilities that accept waste from different subcategories to
round to the nearest five percent. The final rule did not include this option. EPA clearly
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intends that the facility accurately account for all off-site wastes accepted - even if these off-
site wastes are small in volume or represent a small percent of the wastewater discharged.
Q3. Are we required to use the subcategorization procedure outlined by EPA? For example,
our facility accepts a waste that has high levels of zinc, low levels of other metals, and low
levels of oil and grease. Using EPA's hierarchy, it would fall into the organics subcategory,
but we believe it clearly belongs in the metals subcategory. Why do I have to classify it in
the organics subcategory?
A3. First, EPA stresses that the criteria and information on subcategory determination are
provided as guidance to permit writers, control authorities, and CWT facilities in properly
classifying their wastes by subcategory. EPA expects that facilities will also apply common
sense when using our suggested guides. Clearly, the waste described is a metals
subcategory waste and should be classified as such. If it is not explicitly listed in the waste
receipt classification table in Chapter 5, and the numerical hierarchy would otherwise
classify this unusual waste as an organics waste, despite the high concentration of zinc,
then the facility's judgment could override the classification procedure's output and classify
this particular waste as needed.
Q4. We accept lubricants that sometimes contain nickel in concentrations in excess of the 37.5
mg/L listed in the waste hierarchy. Should this be classified as an oils waste, a metals
waste or both?
A4. Using EPA's recommended subcategorization procedure, this waste would be classified in
the oils subcategory. Lubricants are included in the waste receipt classification table as an
oils subcategory waste. The subcategorization hierarchy (numerical criteria) should only
be consulted if the waste is not listed in the waste receipt classification table in Chapter 5.
Q5. Does the CWT rule require documentation for determining the proper classification of
wastes?
A5. The CWT rule does not require any documentation for determining the proper classification
of wastes. However, permitting or control authorities may require such documentation.
In EPA's view, however, most CWT facilities already collect and maintain sufficient
information during their waste acceptance procedures to classify their waste receipts
properly. In EPA's view, permitting or control authorities should only request additional
documentation if a facility's waste acceptance procedures are inadequate. Inadequate
support for classification could conceivably prevent a permitting or control authority from
confirming which subcategories apply, at which point the permitting or control authority
could choose to not issue a discharge permit.
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Q6. I have been accepting used oils and coolants. I am now accepting bilge water. Do I need
to repeat the determination?
A6. No, since bilge water is classified as an oils subcategory waste (see Table 5-1, Waste Receipt
Classification), a new round of subcategorization is unnecessary.
U£ Treatment
Ql. Does the CWT rule require facilities to use the model technologies?
Al. No, CWT facilities are not required to use the model technologies.
Q2. I installed the model technologies and still can't meet the required limits? What am I doing
wrong?
A2. Installation of the model technology does not guarantee that you will be able to meet the
discharge requirements. You must also optimize the operation of your system. In addition,
many facilities improperly target the design and operation of their treatment systems to
actual numerical limits. This does not ensure that the facility will be in compliance. Rather,
a facility should target the design and operation of its system to the long-term averages.
The long-term average for each limit is included in Appendix A. Unless there is a major
upset of the system, this should ensure compliance with the discharge requirements.
Q3. How does this rule prevent the commingling of different types of wastestreams prior to
receipt at the CWT. For example, waste is represented as oily waste, but metals have been
mixed in during transport.
A3. As discussed in Chapter 5, waste generators initially furnish a CWT facility with a sample
of the wastestream to be treated. The CWT analyzes this sample to characterize the level
of pollutants in the sample and to determine what treatment is necessary. Then, generally,
for each truck load of waste received for treatment from the generator, the CWT facility
collects a sample and conducts "fingerprint" analysis to confirm it is similar to the initial
sample tested. In this manner, the CWT facility should be aware if the waste generator is
misrepresenting the wastestream characteristics. In the case of the example provided, the
facility could decline to accept the wastestream (if it is unable to treat it effectively or if the
wastestream is from a subcategory which would violate the facility's discharge permit).
Monitoring for Compliance
Ql. What monitoring frequency is required by the CWT rule?
Al. The CWT rule does not establish nationally-applicable monitoring frequency requirements,
but rather, leaves the decision up to the permitting authority. The permitting or control
authority is in the best position to gauge the facilities potential for violations and establish
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monitoring frequencies accordingly. Permitting and control authorities generally use
factors such as raw waste variability, wastewater flow volume, type of treatment, and
compliance history, as well as self-developed IPPs to determine appropriate monitoring
frequencies. Section 403.12(e) of the pretreatment regulations requires Ills subject to
categorical pretreatment standards such as the CWT regulations to self-monitor and report
at least twice per year.
Q2. Can a permitting or control authority reduce or waive sampling requirements for a
particular pollutant after a history of sampling shows the pollutant to be absent?
A2. EPA has not established methods to waive sampling requirements for particular pollutants
under the CWT rule. In general, EPA does not believe sampling requirements for specific
pollutants should be waived entirely for the CWT industry because this industry accepts
a wide variety of wastestreams that can vary considerably from one batch to the next.
However, direct dischargers (those with NPDES permits) that demonstrate their
discharge is continually well within the limitations may have their monitoring
frequency reduced. The requirements and procedures for this are described in
detail in the EPA publication "Interim Guidance for Performance-Based Reduction
of NPDES Permit Monitoring Frequencies" (EPA-833-B-96-001, April, 1996). In
general, at least two years of monitoring data are needed and the modifications are
made during the re-issuance of the permit. The modifications are made on a
pollutant-by-pollutant basis.
For indirect dischargers, EPA has proposed regulatory and administrative changes
that may reduce the burden on entities regulated under the National Pretreatment
Program. These proposed changes are referred to as the Pretreatment Streamlining
Proposal. One of the proposed changes is to allow control authorities to waive
industrial user (IU) sampling for pollutants that have been determined not to be
present.
Q3. Does a CWT facility (electing to comply with the multiple wastestream limitations or
standards) that accepts cyanide have to monitor for cyanide immediately following cyanide
pretreatment?
A3. The CWT rule requires a facility that accepts wastes containing cyanide in excess of 136
mg/L to monitor for cyanide after cyanide treatment and before commingling with other
waste streams. However, the permitting or control authority may allow the facility to
monitor after commingling with other waste streams if the permitting or control authority
adjusts the limit (or standard) using the building block approach (or combined waste
stream formula) and the adjusted limit (or standard) does not fall below the analytical
minimum level.
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Q4. What if a wastewater matrix causes interference with the analytical method (and therefore
the detection limit is higher than the discharge limit)?
A4. The procedures outlined in EPA's Guidance on Evaluation, Resolution, and Documentation
of Analytical Problems Associated with Compliance Monitoring (EPA 821-B-93-001)
explain how to eliminate matrix or other interference with analysis.
Multiple Wastestream Subcategory
Ql. Can permitting or pretreatment authorities use the building block approach or combined
waste stream formula to determine the discharge requirements for a facility in lieu of the
multiple wastestream subcategory pretreatment standards?
Al. No, the building block approach and combined waste stream formula cannot be used to
establish discharge requirements for facilities subject to more than one CWT subcategory.
The facility must comply with each applicable subcategory's limitations or standards
separately or with the applicable set of multiple wastestream subcategory limitations or
standards.
Q2. Does a CWT facility need to know the percentage of wastes that would be in each of the
subcategories if it elects to comply with the multiple wastestream subcategory limitations?
A2. No, the CWT facility need not know the percentage of wastes that would fall into each of
the subcategories if it chooses to comply with the multiple wastestream subcategory
limitations. The multiple wastestream subcategory limitations consist of the most stringent
of the limitations from each subcategory for each pollutant.
Initial Certification Paperwork for Equivalent Treatment
Ql. Who receives the initial certification?
Al. The permitting or control authority receives the certification from CWT facilities that wish
to comply with multiple wastestream limitations or standards.
Q2. Does a CWT facility have to use the model technology to establish equivalent treatment?
A2. No, facilities electing to comply with the multiple wastestream subcategory limitations or
standards may use the model technology or any technology they can demonstrate will
achieve comparable removals.
Q3. What data requirements are necessary to establish equivalent treatment? For example, to
establish that my system achieves zinc removals equivalent to the model technology, how
many samples must I collect?
A3. The final CWT rule defines equivalent treatment, but gives CWT facilities the latitude to
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determine the appropriate manner in which to establish it. The rule does not specify a
particular "number" of samples that must be collected and submitted. In fact, the final rule
does not require CWT facilities to collect any samples. CWT facilities should work with
their respective permit writer or control authority to determine an appropriate and
reasonable manner to establish equivalent treatment for their particular circumstances.
Q4. When does the initial certification paperwork have to be completed?
A4. For existing indirect dischargers, the initial certification paperwork must be completed by
or before the compliance deadline. For existing direct dischargers, new direct dischargers
and new indirect dischargers, the initial certification must be completed by the time of
permit or control mechanism issuance, re-issuance or renewal. EPA suggests that an
indirect discharging CWT facility that plans to comply with the multiple wastestream
subcategory pretreatment standards notify its control authority of this intent and also state,
in their BMR submission, whether it can or cannot comply with theses standards currently.
Q5. Does the system have to be fully tested and operational at the time of the initial certific ation
statement is submitted?
A5. No, the treatment system may be tested after the initial certification statement is submitted,
but the system must be fully operational by the required date of compliance.
Q6. Do treatability tests require elaborate QA/QC procedures?
A6. No, the level of QA/QC conducted during EPA sampling is not necessary for facility
treatability testing.
Periodic Certification Statement for Equivalent Treatment Certification
Ql. When is the periodic certification required?
Al. The periodic certification requirement begins after the facility has submitted its initial
certification and is required once per year. The timing of submittal can be coordinated with
the submittal of compliance paperwork required by the General Pretreatment Regulations
or the NPDES regulations.
Q2. Does a facility need to monitor for the regulated pollutants when developing a relationship
for surrogate parameters used to demonstrate that a treatment system is well -operated and
maintained?
A2. The CWT rule does not require monitoring or the establishment of a surrogate parameter
to demonstrate that a system is well-operated and maintained. However, if a facility
chooses to use a surrogate parameter to demonstrate that a treatment system is well
10-8
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QUESTIONS AND ANSWERS CWT SMALL ENTITY COMPLIANCE GUIDE
operated and maintained, it should monitor for the specific regulated pollutant(s) to
establish the relationship between the surrogate and the regulated pollutants.
Q3. In the periodic certification statement, the CWT rule requires the facility to provide
information if it has modified its treatment system. What does EPA mean?
A3. In EPA's view, a modification is any significant change in the equipment, treatment
chemicals, or operating procedures that could negatively affect the demonstrated removals.
For example, if a facility has demonstrated equivalent treatment with a system that includes
chemical precipitation and dissolved air flotation, and decides to eliminate the chemical
precipitation step, this would be a modification that would require a re-demonstration
assuming the applicable subcategories have not changed. However, switching chemical
companies is an insignificant change.
Q4. Are CWT facilities required to submit monitoring data to the permitting or control
authority that they collect to demonstrate that a treatment system is well-operated and
maintained?
A4. No, such data should be kept with the facility's on-site compliance paperwork and must
be available to the permitting or control authority as well as enforcement officials.
On-Site Compliance Paperwork for Equivalent Treatment Certification
Ql. For on-site compliance paperwork, may a facility cross-reference other records at the
facility, or does a separate copy of those records need to exist in its CWT compliance file?
Al. Facilities may cross-reference records in other parts of the facility, but must be able to
produce those records when requested by their permitting or control authority.
Q2. How is confidential business information (CBI) that is included as part of compliance
paperwork (either initial or periodic certification or other on-site compliance paperwork)
handled? What can a facility claim as CBI?
A2. The permitting or control authority is authorized to view CBI, but they must have
procedures in place to protect CBI from unauthorized public access. Permitting and control
authorities have to allow access to the public at least to the extent that the EPA
confidentiality regulations allow public access. A facility cannot claim any effluent data
or data associated with the "point of compliance" as confidential.
Costs
Ql. Is there any guidance on how much CWT facilities should spend on treatment of CWT
wastewater?
10-9
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QUESTIONS AND ANSWERS CWT SMALL ENTITY COMPLIANCE GUIDE
Al. There is no guidance on the amount of money a facility should spend on wastewater
treatment; it depends on a number of factors that the facility should consider in making a
final compliance decision. These factors include the amount of wastewater treated, the
characteristics of the wastewater being treated, treatment in place currently at the facility,
the financial stability of the facility, and the market for waste treatment. For example, a
facility may be able to treat a wastewater adequately using available technologies.
However, if the amount of wastewater treated is very small, it may not be profitable for a
facility to treat and discharge this wastewater to comply with this rule.
Q2. My facility cannot currently afford the upgrades to our treatment system that will be
required to comply with this rule. Can we get a waiver of the requirements or an extension
on the date of compliance?
A2. No, a CWT facility can not obtain a waiver (or PDF) based on financial constraints. If the
facility is unable to comply with the regulation by the required date due to financial
considerations, it should cease discharge by the compliance date.
Q3. Can EPA make any recommendations on financing additional wastewater treatment
technologies for small businesses to comply with this rule?
A3. PPA has compiled a variety of sources to assist small businesses in applying for loans for
pollution control. See http://www.epa.gov/smallbusiness/money.htm.
Baseline Monitoring Report
Ql. When is the baseline monitoring report due and to whom must it be submitted?
Al. For existing indirect dischargers, the baseline monitoring report is due on July 21, 2001. It
is submitted to the control authority.
Q2. How many samples are required for the BMR?
A2. 40 CFR 403.12(b)(5)(iv) states, "The User shall take a minimum of one representative
sample to compile the data necessary to comply with the requirements of this paragraph."
The type of sample will depend on the nature of the pollutant as described in 40 CFR
403.12(b)(5)(iii), which states "a minimum of four(4) grab samples must be used for pH,
cyanide, total phenols, oil and grease, sulfide, and volatile organics. For all other
pollutants, 24-hour composite samples must be obtained through flow-proportional
composite sampling techniques where feasible. The Control Authority may waive flow-
proportional composite sampling for any Industrial User that demonstrates that flow-
proportional sampling is infeasible. In such cases, samples may be obtained through time-
proportional composite sampling techniques or through a minimum of four(4) grab
samples where the User demonstrates that this will provide a representative sample of the
10-10
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QUESTIONS AND ANSWERS CWT SMALL ENTITY COMPLIANCE GUIDE
effluent being discharged." If the process produces a discharge that is a homogeneous
batch, one grab sample may be taken.
RCRA Permits
Ql. Our facility has a Federal RCRA permit because we accept hazardous wastes. We cannot
obtain a RCRA permit modification to alter our treatment system to meet the required
pretreatment standards by the required date of compliance. How can we get an extension?
Al. Many CWT facilities with Federal RCRA permits are under the impression that if they
modify their existing treatment system to comply with this regulation they will have to
obtain a RCRA permit modification. This is incorrect. RCRA contains a wastewater
treatment unit exemption from RCRA permit modification requirements for wastewater
treatment units that are subject to NPDES or pretreatment requirements established under
the CWA. Thus, CWT facilities with RCRA permits will not need to modify their RCRA
permits as a result of this rule.
10-11
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Le".
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11
WHERE TO GET ADDITIONAL HELP
i i < T;his chapter presents additional sources of information, as well as EPA contacts, that may
i help small entities obtain additional information related to implementation of the CWT
l.i effluent guidelines limitations and standards for new and existing sources. Specifically, this
chapter presents a list of selected federal programs. These lists also include information on
how to reach EPA program personnel and how to access periodicals and directories.
11.1 Where Can I Get Copies of Document Related to the CWT Rule?
Copies of documents directly related to the CWT effluent guidelines and standards, such
as the Technical Development Document (EPA-821-R-00-020), the Economic Analysis (EPA-821-R-
00-024), the Cost Effectiveness Analysis (EPA-821-R-00-023), the Detailed Costing Document (EPA-
821-R-00-021), and the Environmental Assessment Document (EPA-821-R-00-022) may be obtained
from our web site at: www.epa.gov/ost/guide/cwti.html. You may also obtain copies of these
documents by contacting the Office of Water Resource Center at (202) 260-7786 or by e-mail at:
waterpubs@epamail.epa.gov or fax: (202) 260-0386.
11.2 Who Can Help Me at EPA with Specific Questions About the CWT Rule?
Questions specifically related to the effluent limitations guidelines and standards for the
CWT industry should be directed to:
A. Ms. Jan Matuszko (technical questions)
Engineering and Analysis Division
Washington, DC
Tel: (202) 260-9126
Fax: (202) 260-7185
e-mail: matuszko.jan@epa.gov
B. Mr. Timothy Connor (technical questions)
Engineering and Analysis Division
Washington, DC
Tel: (202) 260-3164
Fax: (202) 260-7185
11-1
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WHERE TO GET ADDITIONAL HELP
CWT SMALL ENTITY COMPLIANCE GUIDE
e-mail: connor.timothy@epa.gov
C. Dr. William Wheeler (economic questions)
Engineering and Analysis Division
Washington, DC
Tel: (202) 260-7905
Fax: (202) 260-7185
e-mail: wheeler.william@epa.gov
General Information
There are a number of web site resources for obtaining general information about the CWT
rule, related programs, and general EPA policies. The following table identifies some of the main
resources you may find helpful.
Table 11-1 General Resources Information
Resource
Web Address
Description
EPA web site
Engineering and Analysis
Division website
Federal Register Online via
GPO Access
EPA Small Business
Assistance Program (SBAP)
EPA Office of Enforcement
and Compliance Assurance:
Policy on Compliance
Incentives for Small Business
www.epa.gov
www.epa.gov/ ost/ guide
www.access.gpo.gov/
su_docs/aces/
acesl40.html
www.epa. gov/ ttn/ sbap
es.epa.gov/oeca/
smbusLhtml
EPA's web site includes press releases,
proposed and final EPA rules and
regulations, and updates to this manual.
Federal Register notices of proposed and
final effluent limitations guidelines and
standard rules, supplemental notices,
pre-proposal documents, background
information, draft industry
questionnaires, public meeting notices,
development documents and other
supporting documents, updates to this
manual, and related documents.
Official Federal Register documents,
including the published CWT regulation
(December 22, 2000)
State and local SBAP contacts, SBAP
materials, related web sites, meetings and
conferences
Applicability of EPA's policy to promote
environmental compliance among small
businesses. Criteria for civil penalty
mitigation.
11-2
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WHERE TO GET ADDITIONAL HELP
CWT SMALL ENTITY COMPLIANCE GUIDE
Table 11-1 General Resources Information
Resource
Web Address
Description
EPA Office of Enforcement
and Compliance Assurance:
Audit Policy: Incentives for
Self-Policing
es.epa.gov/oeca/
auditpol.html
Applicability of EPA's policy to enhance
protection of human health and the
environment by encouraging regulated
entities to voluntarily discover, and
disclose and correct, violations of
environmental requirements.
11-3
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FINAL EFFLUENT LIMITATIONS AND STANDARDS FOR
THE CWT INDUSTRY
p i < T;his appendix presents the final effluent limitations and standards for the CWT industry. The
j limitations and standards are presented in tables starting on the next page. The limits are
1 -:- accompanied by the long-term averages that CWT facilities ought to use as the basis for
design of their treatment systems. Note that the metals, oils, organics, and multiple wastestream
subcategories are labeled Subcategories A, B, Q and D, respectively. Note also that the multiple
wastestream effluent limitations and standards are presented for all possible subcategory
combinations.
Appendix A -1
-------
Table Appendix A-l. CWT design targets and BPT limitations by subcategory (mg/L)
Pollutant Parameters
CONVENTIONAL PARAMETERS*
BODs
Oil & Grease
TSS
METAL ANALYTES
Antimony
Arsenic
Barium
Cadium
Chromium
Cobalt
Copper
Cyanide (in-plant)
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Tin
Titanium
Vanadium
Zinc
ORGANIC ANALYTES
Acetone
Acetophenone
Aniline
Bis(2-ethylhexyl) phthalate
Butanone
Butylbenzyl phthalate
Carbazole
o-Cresol
p-Cresol
n-Decane
2,3-Dichloroaniline
Fluoranthene
n-Octadecane
Phenol
Pyridine
2.4.6-Trichloroohenol
CAS
Registry
Number
C-003
C-007
C-009
7440-36-0
7440-38-2
7440-39-3
7440-43-9
7440-47-3
7440-48-4
7440-50-8
7439-92-1
7439-97-6
7439-98-7
7440-02-0
7782-49-2
7440-22-4
7440-31-5
7440-32-6
7440-62-2
7440-66-6
67-64-1
98-86-2
62-53-3
117-81-7
78-93-3
85-68-7
86-74-8
95-48-7
106-44-5
124-18-5
608-27-5
206-44-0
593-45-3
108-95-2
110-86-1
88-06-2
Metals - Subcategory A
Long-Term Limitations
Avera9e .. ğu,
_ _ ., Monthly
Design Daily . '
T . .. Average
Targets Maximum , . °
Maximum
34.3
16.8
0.170
0.0839
0.0580
1.67
0.115
0.744
136
0.177
0.000560
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
205.
60.0
0.249
0.162
0.474
15.5
0.192
4.14
500
1.32
0.00234
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
50.2
31.0
0.206
0.104
0.0962
3.07
0.124
1.06
178
0.283
0.000739
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
Long-Term
Average
Design
Targets
28.3
25.5
0.103
0.789
0.221
0.00746
0.183
7.42
0.157
0.0986
0.00309
1.54
0.107
0.0217
3.14
0.0629
0.0550
0.151
0.238
0.0173
0.203
Oils - Subcategory B
Limitations
Monthly
Daily . *
. Average
Maximum , . °
Maximum
127.
74.1
0.237
2.95
0.427
0.0172
0.746
56.4
0.500
0.350
0.0172
3.50
0.335
0.0510
8.26
0.215
0.188
0.598
0.948
0.0537
0.589
38.0
30.6
0.141
1.33
0.281
0.0102
0.323
18.8
0.242
0.160
0.00647
2.09
0.165
0.0299
4.50
0.101
0.0887
0.276
0.437
0.0268
0.302
Organics - Subcategory C
Long-Term Limitations
Average Monthly
Design Daily . y
T . .. Average
Targets Maximum , . °
Maximum
41.0
45.0
0.569
0.704
0.943
0.382
2.06
0.0359
0.0105
0.878
0.185
0.0682
0.0230
0.362
0.116
0.0858
163.
216.
0.928
0.865
1.01
0.497
30.2
0.114
0.0333
4.81
1.92
0.698
0.0731
3.65
0.370
0.155
53.0
61.3
0.679
0.757
0.965
0.420
7.97
0.0562
0.0164
1.85
0.561
0.205
0.0361
1.08
0.182
0.106
* - The promulgated performance bounds for pH are 6-9 in standard units.
Appendix A - 2
-------
Table Appendix A-2. CWT design targets and BPT limitations for Subcategory D mixed wastestream combinations (mg/L)
Metals,
CAS Long-Term
Pollutant Parameters Registry Average
Number Design
Targets
CONVENTIONAL PARAMETERS*
BODs C-003 41.0
Oil & Grease C-007 28.3
TSS C-009 25.5
METAL ANALYTES
Antimony 7440-36-0 0.103
Arsenic 7440-38-2 0.0839
Barium 7440-39-3 0.221
Cadium 7440-43-9 0.00746
Chromium 7440-47-3 0.183
Cobalt 7440-48-4 0.115
Copper 7440-50-8 0.157
Cyanide (in-plant) 136
Lead 7439-92-1 0.0986
Mercury 7439-97-6 0.000560
Molybdenum 7439-98-7 0.943
Nickel 7440-02-0 1.16
Selenium 7782-49-2 0.280
Silver 7440-22-4 0.0264
Tin 7440-31-5 0.0898
Titanium 7440-32-6 0.0217
Vanadium 7440-62-2 0.0500
Zinc 7440-66-6 0.382
ORGANIC ANALYTES
Acetone 67-64-1 2.06
Acetophenone 98-86-2 0.0359
Aniline 62-53-3 0.0105
Bis(2-ethylhexyl) phthalate 117-81-7 0.0629
Butanone 78-93-3 0.878
Butylbenzyl phthalate 85-68-7 0.0550
Carbazole 86-74-8 0.151
o-Cresol 95-48-7 0.185
p-Cresol 106-44-5 0.0682
n-Decane 124-18-5 0.238
2,3-Dichloroaniline 608-27-5 0.0230
Fluoranthene 206-44-0 0.0173
n-Octadecane 593-45-3 0.203
Phenol 108-95-2 0.362
Pyridine 110-86-1 0.116
2.4.6-Trichloroohenol 88-06-2 0.0858
Oils, Organics (A, B, & C)
Limitations
Daily "f°"thlv
.. . Average
Maximum .. .
Maximum
163.
127.
74.1
0.237
0.162
0.427
0.0172
0.746
0.192
0.500
500
0.350
0.00234
1.01
3.95
1.64
0.120
0.409
0.0510
0.218
0.497
30.2
0.114
0.0333
0.215
4.81
0.188
0.598
1.92
0.698
0.948
0.0731
0.0537
0.589
3.65
0.370
0.155
53.0
38.0
30.6
0.141
0.104
0.281
0.0102
0.323
0.124
0.242
178
0.160
0.000739
0.965
1.45
0.408
0.0351
0.120
0.0299
0.0662
0.420
7.97
0.0562
0.0164
0.101
1.85
0.0887
0.276
0.561
0.205
0.437
0.0361
0.0268
0.302
1.08
0.182
0.106
Long-Term
Average
Design
Targets
28.3
25.5
0.103
0.0839
0.221
0.00746
0.183
0.115
0.157
136
0.0986
0.000560
1.54
1.16
0.280
0.0264
0.0898
0.0217
0.0500
0.413
0.0629
0.0550
0.151
0.238
0.0173
0.203
Metals, Oils (A & B)
Limitations
Daily "f°"thlv
.. . Average
Maximum .. .
Maximum
127.
74.1
0.237
0.162
0.427
0.0172
0.746
0.192
0.500
500
0.350
0.00234
3.50
3.95
1.64
0.120
0.409
0.0510
0.218
2.87
0.215
0.188
0.598
0.948
0.0537
0.589
38.0
30.6
0.141
0.104
0.281
0.0102
0.323
0.124
0.242
178
0.160
0.000739
2.09
1.45
0.408
0.0351
0.120
0.0299
0.0662
0.641
0.101
0.0887
0.276
0.437
0.0268
0.302
Metals, Organics (A & C)
Long-Term Limitations
nV8rage n -, Monthly
Design Daily *
Targets Maximum Average
Maximum
41.0
34.3
16.8
0.170
0.0839
0.0580
1.67
0.115
0.704
136
0.177
0.000560
0.943
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.382
2.06
0.0359
0.0105
0.878
0.185
0.0682
0.0230
0.362
0.116
0.0858
163.
205.
60.0
0.249
0.162
0.474
15.5
0.192
0.865
500
1.32
0.00234
1.01
3.95
1.64
0.120
0.409
0.0947
0.218
0.497
30.2
0.114
0.0333
4.81
1.92
0.698
0.0731
3.65
0.370
0.155
53.0
50.2
31.0
0.206
0.104
0.0962
3.07
0.124
0.757
178
0.283
0.000739
0.965
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.420
7.97
0.0562
0.0164
1.85
0.561
0.205
0.0361
1.08
0.182
0.106
Long-Term
Average
Design
Targets
41.0
28.3
25.5
0.103
0.789
0.221
0.00746
0.183
7.42
0.157
0.0986
0.00309
0.943
0.107
0.0217
0.382
2.06
0.0359
0.0105
0.0629
0.878
0.0550
0.151
0.185
0.0682
0.238
0.0230
0.0173
0.203
0.362
0.116
0.0858
Oils, Organics (B & C)
Limitations
.. Monthly
Daily 3
.. . Average
Maximum .
Maximum
163.
127.
74.1
0.237
2.95
0.427
0.0172
0.746
56.4
0.500
0.350
0.0172
1.01
0.335
0.0510
0.497
30.2
0.114
0.0333
0.215
4.81
0.188
0.598
1.92
0.698
0.948
0.0731
0.0537
0.589
3.65
0.370
0.155
53.0
38.0
30.6
0.141
1.33
0.281
0.0102
0.323
18.8
0.242
0.160
0.00647
0.965
0.165
0.0299
0.420
7.97
0.0562
0.0164
0.101
1.85
0.0887
0.276
0.561
0.205
0.437
0.0361
0.0268
0.302
1.08
0.182
0.106
' - The promulgated performance bounds for pH are 6-9 in standard units.
Appendix A - 3
-------
Table Appendix A-3. CWT design targets and NSPS standards by subcategory (mg/L)
Pollutant Parameters
CONVENTIONAL PARAMETERS*
BODs
Oil & Grease
TSS
METAL ANALYTES
Antimony
Arsenic
Barium
Cadium
Chromium
Cobalt
Copper
Cyanide (in-plant)
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Tin
Titanium
Vanadium
Zinc
ORGANIC ANALYTES
Acetone
Acetophenone
Aniline
Bis(2-ethylhexyl) phthalate
Butanone
Butylbenzyl phthalate
Carbazole
o-Cresol
p-Cresol
n-Decane
2,3-Dichloroaniline
Fluoranthene
n-Octadecane
Phenol
Pyridine
2,4,6-Trichlorophenol
CAS
Registry
Number
C-003
C-007
C-009
7440-36-0
7440-38-2
7440-39-3
7440-43-9
7440-47-3
7440-48-4
7440-50-8
7439-92-1
7439-97-6
7439-98-7
7440-02-0
7782-49-2
7440-22-4
7440-31-5
7440-32-6
7440-62-2
7440-66-6
67-64-1
98-86-2
62-53-3
117-81-7
78-93-3
85-68-7
86-74-8
95-48-7
106-44-5
124-18-5
608-27-5
206-44-0
593-45-3
108-95-2
110-86-1
88-06-2
Metals
Long-Term
Average
Design
Targets
34.3
9.25
0.0213
0.0112
0.0819
0.0398
0.0574
0.169
136
0.177
0.000201
0.255
0.0563
0.0100
0.0300
0.00500
0.0500
0.206
- Subcategory A
Standards
Monthly
Daily . *
. Average
Maximum , . °
Maximum
205.
29.6
0.111
0.0993
0.782
0.167
0.182
0.659
500
1.32
0.000641
0.794
0.176
0.0318
0.0955
0.0159
0.0628
0.657
50.2
11.3
0.0312
0.0199
0.163
0.0522
0.0703
0.216
178
0.283
0.000246
0.309
0.0698
0.0122
0.0367
0.00612
0.0518
0.252
Long-Term
Average
Design
Targets
28.3
25.5
0.103
0.789
0.221
0.00746
0.183
7.42
0.157
0.0986
0.00309
1.54
0.107
0.0217
3.14
0.0629
0.0550
0.151
0.238
0.0173
0.203
Oils - Subcategory B
Standards
Daily ^hly
. Average
Maximum , . °
Maximum
127.
74.1
0.237
2.95
0.427
0.0172
0.746
56.4
0.500
0.350
0.0172
3.50
0.335
0.0510
8.26
0.215
0.188
0.598
0.948
0.0537
0.589
38.0
30.6
0.141
1.33
0.281
0.0102
0.323
18.8
0.242
0.160
0.00647
2.09
0.165
0.0299
4.50
0.101
0.0887
0.276
0.437
0.0268
0.302
Long-Term
Average
Design
Targets
41.0
45.0
0.569
0.704
0.943
0.382
2.06
0.0359
0.0105
0.878
0.185
0.0682
0.0230
0.362
0.116
0.0858
Organics - Subcategory C
Standards
Daily ^hly
. Average
Maximum , . °
Maximum
163.
216.
0.928
0.865
1.01
0.497
30.2
0.114
0.0333
4.81
1.92
0.698
0.0731
3.65
0.370
0.155
53.0
61.3
0.679
0.757
0.965
0.420
7.97
0.0562
0.0164
1.85
0.561
0.205
0.0361
1.08
0.182
0.106
' - The promulgated performance bounds for pH are 6-9 in standard units.
Appendix A - 4
-------
Table Appendix A-4. CWT design targets and NSPS standards for Subcategory D mixed wastestream combinations (mg/L)
CAS
Pollutant Parameters Registry
Number
CONVENTIONALS PARAMETERS*
BODs C-003
Oil & Grease C-007
TSS C-009
METAL ANALYTES
Antimony 7440-36-0
Arsenic 7440-38-2
Barium 7440-39-3
Cadium 7440-43-9
Chromium 7440-47-3
Cobalt 7440-48-4
Copper 7440-50-8
Cyanide (in-plant)
Lead 7439-92-1
Mercury 7439-97-6
Molybdenum 7439-98-7
Nickel 7440-02-0
Selenium 7782-49-2
Silver 7440-22-4
Tin 7440-31-5
Titanium 7440-32-6
Vanadium 7440-62-2
Zinc 7440-66-6
ORGANIC ANALYTES
Acetone 67-64-1
Acetophenone 98-86-2
Aniline 62-53-3
Bis(2-ethylhexyl) phthalate 117-81-7
Butanone 78-93-3
Butylbenzyl phthalate 85-68-7
Carbazole 86-74-8
o-Cresol 95-48-7
p-Cresol 106-44-5
n-Decane 124-18-5
2,3-Dichloroaniline 608-27-5
Fluoranthene 206-44-0
n-Octadecane 593-45-3
Phenol 108-95-2
Pyridine 110-86-1
2,4,6-Trichlorophenol 88-06-2
Metals,
Long-Term
Average
Design
Targets
41.0
28.3
9.25
0.0213
0.0112
0.221
0.00746
0.0398
0.0574
0.169
136
0.0986
0.000201
0.943
0.255
0.0563
0.0100
0.0300
0.00500
0.0500
0.206
2.06
0.0359
0.0105
0.0629
0.878
0.0550
0.151
0.185
0.0682
0.238
0.0230
0.0173
0.203
0.362
0.116
0.0858
Oils, Organics (A, B, & C)
Standards
Monthly
Daily . *
. Average
Maximum , . °
Maximum
163.
127.
29.6
0.111
0.0993
0.427
0.0172
0.167
0.182
0.659
500
0.350
0.000641
1.01
0.794
0.176
0.0318
0.0955
0.0159
0.0628
0.657
30.2
0.114
0.0333
0.215
4.81
0.188
0.598
1.92
0.698
0.948
0.0731
0.0537
0.589
3.65
0.370
0.155
53.0
38.0
11.3
0.0312
0.0199
0.281
0.0102
0.0522
0.0703
0.216
178
0.160
0.000246
0.965
0.309
0.0698
0.0122
0.0367
0.00612
0.0518
0.252
7.97
0.0562
0.0164
0.101
1.85
0.0887
0.276
0.561
0.205
0.437
0.0361
0.0268
0.302
1.08
0.182
0.106
Long-Term
Average
Design
Targets
28.3
9.25
0.0213
0.0112
0.221
0.00746
0.0398
0.0574
0.169
0.0986
0.000201
1.54
0.255
0.0563
0.0100
0.0300
0.00500
0.0500
0.206
0.0629
0.0550
0.151
0.238
0.0173
0.203
Metals, Oils (A &B)
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
127.
29.6
0.111
0.0993
0.427
0.0172
0.167
0.182
0.659
500
0.350
0.000641
3.50
0.794
0.176
0.0318
0.0955
0.0159
0.0628
0.657
0.215
0.188
0.598
0.948
0.0537
0.589
38.0
11.3
0.0312
0.0199
0.281
0.0102
0.0522
0.0703
0.216
178
0.160
0.000246
2.09
0.309
0.0698
0.0122
0.0367
0.00612
0.0518
0.252
0.101
0.0887
0.276
0.437
0.0268
0.302
Metals, Organics (A &C)
Long-Term Standards
Average Monthly
Design Daily . y
T . .. Average
Targets Maximum , . °
Maximum
41.0
34.3
9.25
0.0213
0.0112
0.0819
0.0398
0.0574
0.169
0.177
0.000201
0.943
0.255
0.0563
0.0100
0.0300
0.00500
0.0500
0.206
2.06
0.0359
0.0105
0.878
0.185
0.0682
0.0230
0.362
0.116
0.0858
163.
205.
29.6
0.111
0.0993
0.782
0.167
0.182
0.659
500
1.32
0.000641
1.01
0.794
0.176
0.0318
0.0955
0.0159
0.0628
0.657
30.2
0.114
0.0333
4.81
1.92
0.698
0.0731
3.65
0.370
0.155
53.0
50.2
11.3
0.0312
0.0199
0.163
0.0522
0.0703
0.216
178
0.283
0.000246
0.965
0.309
0.0698
0.0122
0.0367
0.00612
0.0518
0.252
7.97
0.0562
0.0164
1.85
0.561
0.205
0.0361
1.08
0.182
0.106
Oils,
Long-Term
Average
Design
Targets
41.0
28.3
25.5
0.103
0.789
0.221
0.00746
0.183
7.42
0.157
0.0986
0.00309
0.943
0.107
0.0217
0.382
2.06
0.0359
0.0105
0.0629
0.878
0.0550
0.151
0.185
0.0682
0.238
0.0230
0.0173
0.203
0.362
0.116
0.0858
Organics (B & C)
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
163. 53.0
127. 38.0
74.1 30.6
0.237 0.141
2.95 1.33
0.427 0.281
0.0172 0.0102
0.746 0.323
56.4 18.8
0.500 0.242
0.350 0.160
0.0172 0.00647
1.01 0.965
0.335 0.165
0.0510 0.0299
0.497 0.420
30.2 7.97
0.114 0.0562
0.0333 0.0164
0.215 0.101
4.81 1.85
0.188 0.0887
0.598 0.276
1.92 0.561
0.698 0.205
0.948 0.437
0.0731 0.0361
0.0537 0.0268
0.589 0.302
3.65 1.08
0.370 0.182
0.155 0.106
' - The promulgated performance bounds for pH are 6-9 in standard units.
Appendix A - 5
-------
Table Appendix A-5. CWT design targets and PSES standards by subcategory (mg/L)
Pollutant Parameters
METAL ANALYTES
Antimony
Arsenic
Barium
Cadium
Chromium
Cobalt
Copper
Cyanide (in-plant)
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Tin
Titanium
Vanadium
Zinc
ORGANIC ANALYTES
Bis(2-ethylhexyl) phthalate
Carbazole
o-Cresol
p-Cresol
n-Decane
2,3-Dichloroaniline
Fluoranthene
n-Octadecane
2,4,6-Trichlorophenol
CAS
Registry
Number
7440-36-0
7440-38-2
7440-39-3
7440-43-9
7440-47-3
7440-48-4
7440-50-8
7439-92-1
7439-97-6
7439-98-7
7440-02-0
7782-49-2
7440-22-4
7440-31-5
7440-32-6
7440-62-2
7440-66-6
117-81-7
86-74-8
95-48-7
106-44-5
124-18-5
608-27-5
206-44-0
593-45-3
88-06-2
Long-Term
Average
Design
Targets
0.170
0.0839
0.0580
1.67
0.115
0.744
136
0.177
0.000560
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
Metals - Subcategory A
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.249
0.162
0.474
15.5
0.192
4.14
500
1.32
0.00234
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
0.206
0.104
0.0962
3.07
0.124
1.06
178
0.283
0.000739
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
Long-Term
Average
Design
Targets
0.103
0.221
0.323
7.42
0.257
0.149
1.54
0.107
3.45
0.116
0.151
2.37
0.253
0.793
Oils - Subcategory B
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.237
0.427
0.947
56.4
0.405
0.222
3.50
0.249
6.95
0.267
0.392
5.79
0.787
1.22
0.141
0.281
0.487
18.8
0.301
0.172
2.09
0.146
4.46
0.158
0.233
3.31
0.393
0.925
Organics - Subcategory C
Long-Term Standards
Avera9e .. ğu,
_ _ ., Monthly
Design Daily . '
T . .. Average
Targets Maximum , . °
Maximum
0943 1.01 0.965
0185 1.92 0.561
00682 0.698 0.205
00230 0.0731 0.0361
00858 0.155 0.106
Appendix A - 6
-------
Table Appendix A-6. CWT design targets and PSES standards for Subcategory D mixed wastestream combinations (mg/L)
CAS
Pollutant Parameters Registry
Number
METAL ANALYTES
Antimony 7440-36-0
Arsenic 7440-38-2
Barium 7440-39-3
Cadium 7440-43-9
Chromium 7440-47-3
Cobalt 7440-48-4
Copper 7440-50-8
Cyanide (in-plant)
Lead 7439-92-1
Mercury 7439-97-6
Molybdenum 7439-98-7
Nickel 7440-02-0
Selenium 7782-49-2
Silver 7440-22-4
Tin 7440-31-5
Titanium 7440-32-6
Vanadium 7440-62-2
Zinc 7440-66-6
ORGANIC ANALYTES
Bis(2-ethylhexyl)phthalate 117-81-7
Carbazole 86-74-8
o-Cresol 95-48-7
p-Cresol 106-44-5
n-Decane 124-18-5
2,3-Dichloroaniline 608-27-5
Fluoranthene 206-44-0
n-Octadecane 593-45-3
2,4,6-Trichlorophenol 88-06-2
Metals,
Long-Term
Average
Design
Targets
0.103
0.0839
0.221
0.0580
0.323
0.115
0.257
136
0.149
0.000560
0.943
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
0.116
0.151
0.185
0.0682
2.37
0.0230
0.253
0.793
0.0858
Oils, Organics (A, B, & C)
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.237
0.162
0.427
0.474
0.947
0.192
0.405
500
0.222
0.00234
1.01
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
0.267
0.392
1.92
0.698
5.79
0.0731
0.787
1.22
0.155
0.141
0.104
0.281
0.0962
0.487
0.124
0.301
178
0.172
0.000739
0.965
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
0.158
0.233
0.561
0.205
3.31
0.0361
0.393
0.925
0.106
Long-Term
Average
Design
Targets
0.103
0.0839
0.221
0.0580
0.323
0.115
0.257
136
0.149
0.000560
1.54
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
0.116
0.151
2.37
0.253
0.793
Metals, Oils (A &B)
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.237
0.162
0.427
0.474
0.947
0.192
0.405
500
0.222
0.00234
3.50
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
0.267
0.392
5.79
0.787
1.22
0.141
0.104
0.281
0.0962
0.487
0.124
0.301
178
0.172
0.000739
2.09
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
0.158
0.233
3.31
0.393
0.925
Metals, Organics (A &C)
Long-Term Standards
Avera9e .. ğu,
_ _ ., Monthly
Design Daily . '
T . .. Average
Targets Maximum , . °
Maximum
0.170
0.0839
0.0580
1.67
0.115
0.744
136
0.177
0.000560
0.943
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
0.185
0.0682
0.0230
0.0858
0.249
0.162
0.474
15.5
0.192
4.14
500
1.32
0.00234
1.01
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
1.92
0.698
0.0731
0.155
0.206
0.104
0.0962
3.07
0.124
1.06
178
0.283
0.000739
0.965
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
0.561
0.205
0.0361
0.106
Oils,
Long-Term
Average
Design
Targets
0.103
0.221
0.323
7.42
0.257
0.149
0.943
0.107
3.45
0.116
0.151
0.185
0.0682
2.37
0.0230
0.253
0.793
0.0858
Organics (B & C)
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.237 0.141
0.427 0.281
0.947 0.487
56.4 18.8
0.405 0.301
0.222 0.172
1.01 0.965
0.249 0.146
6.95 4.46
0.267 0.158
0.392 0.233
1.92 0.561
0.698 0.205
5.79 3.31
0.0731 0.0361
0.787 0.393
1.22 0.925
0.155 0.106
Appendix A - 7
-------
Table Appendix A-7. CWT design targets and PSNS standards by subcategory (mg/L)
Pollutant Parameters
METAL ANALYTES
Antimony
Arsenic
Barium
Cadium
Chromium
Cobalt
Copper
Cyanide (in-plant)
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Tin
Titanium
Vanadium
Zinc
ORGANIC ANALYTES
Bis(2-ethylhexyl)phthalate
Carbazole
o-Cresol
p-Cresol
n-Decane
2,3-Dichloroaniline
Fluoranthene
n-Octadecane
2,4,6-Trichlorophenol
CAS
Registry
Number
7440-36-0
7440-38-2
7440-39-3
7440-43-9
7440-47-3
7440-48-4
7440-50-8
7439-92-1
7439-97-6
7439-98-7
7440-02-0
7782-49-2
7440-22-4
7440-31-5
7440-32-6
7440-62-2
7440-66-6
117-81-7
86-74-8
95-48-7
106-44-5
124-18-5
608-27-5
206-44-0
593-45-3
88-06-2
Long-Term
Average
Design
Targets
0.170
0.0839
0.0580
1.67
0.115
0.744
136
0.177
0.000560
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
Metals - Subcategory A
Standards
Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.249
0.162
0.474
15.5
0.192
4.14
500
1.32
0.00234
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
0.206
0.104
0.0962
3.07
0.124
1.06
178
0.283
0.000739
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
Long-Term
Average
Design
Targets
0.103
0.221
0.183
7.42
0.157
0.0986
1.54
0.107
3.14
0.0629
0.151
0.238
0.0173
0.203
Oils - Subcategory B
Standards
Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.237
0.427
0.746
56.4
0.500
0.350
3.50
0.335
8.26
0.215
0.598
0.948
0.0537
0.589
0.141
0.281
0.323
18.8
0.242
0.160
2.09
0.165
4.50
0.101
0.276
0.437
0.0268
0.302
Organics - Subcategory C
Long-Term Standards
Avera9e .. ğu,
_ _ ., Monthly
Design Daily . '
T . .. Average
Targets Maximum , . °
Maximum
0943 1.01 0.965
0185 1.92 0.561
00682 0.698 0.205
00230 0.0731 0.0361
00858 0.155 0.106
Appendix A - 8
-------
Table Appendix A-8. CWT design targets and PSNS standards for Subcategory D mixed wastestream combinations (mg/L)
CAS
Pollutant Parameters Registry
Number
METAL ANALYTES
Antimony 7440-36-0
Arsenic 7440-38-2
Barium 7440-39-3
Cadium 7440-43-9
Chromium 7440-47-3
Cobalt 7440-48-4
Copper 7440-50-8
Cyanide (in-plant)
Lead 7439-92-1
Mercury 7439-97-6
Molybdenum 7439-98-7
Nickel 7440-02-0
Selenium 7782-49-2
Silver 7440-22-4
Tin 7440-31-5
Titanium 7440-32-6
Vanadium 7440-62-2
Zinc 7440-66-6
ORGANIC ANALYTES
Bis(2-ethylhexyl)phthalate 117-81-7
Carbazole 86-74-8
o-Cresol 95-48-7
p-Cresol 106-44-5
n-Decane 124-18-5
2,3-Dichloroaniline 608-27-5
Fluoranthene 206-44-0
n-Octadecane 593-45-3
2,4,6-Trichlorophenol 88-06-2
Metals,
Long-Term
Average
Design
Targets
0.103
0.0839
0.221
0.0580
0.183
0.115
0.157
136
0.0986
Oils, Organics (A, B, & C)
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.237
0.162
0.427
0.474
0.746
0.192
0.500
500
0.350
0.000560 0.00234
0.943
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
0.0629
0.151
0.185
0.0682
0.238
0.0230
0.0173
0.203
0.0858
1.01
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
0.215
0.598
1.92
0.698
0.948
0.0731
0.0537
0.589
0.155
0.141
0.104
0.281
0.0962
0.323
0.124
0.242
178
0.160
0.000739
0.965
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
0.101
0.276
0.561
0.205
0.437
0.0361
0.0268
0.302
0.106
Long-Term
Average
Design
Targets
0.103
0.0839
0.221
0.0580
0.183
0.115
0.157
136
0.0986
Metals, Oils (A &B)
Standards
_ ., Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.237
0.162
0.427
0.474
0.746
0.192
0.500
500
0.350
0.000560 0.00234
1.54
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
0.0629
0.151
0.238
0.0173
0.203
3.50
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
0.215
0.598
0.948
0.0537
0.589
0.141
0.104
0.281
0.0962
0.323
0.124
0.242
178
0.160
0.000739
2.09
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
0.101
0.276
0.437
0.0268
0.302
Metals, Organics (A &C)
Long-Term Standards
Avera9e .. ğu,
_ _ ., Monthly
Design Daily . '
T . .. Average
Targets Maximum , . °
Maximum
0.170
0.0839
0.0580
1.67
0.115
0.744
136
0.177
0.000560
0.943
1.16
0.280
0.0264
0.0898
0.0569
0.0500
0.413
0.185
0.0682
0.0230
0.0858
0.249
0.162
0.474
15.5
0.192
4.14
500
1.32
0.00234
1.01
3.95
1.64
0.120
0.409
0.0947
0.218
2.87
1.92
0.698
0.0731
0.155
0.206
0.104
0.0962
3.07
0.124
1.06
178
0.283
0.000739
0.965
1.45
0.408
0.0351
0.120
0.0618
0.0662
0.641
0.561
0.205
0.0361
0.106
Oils
Long-Term
Average
Design
Targets
0.103
0.221
0.183
7.42
0.157
0.0986
0.943
0.107
3.14
0.0629
0.151
0.185
0.0682
0.238
0.0230
0.0173
0.203
0.0858
Organics (B & C)
Standards
Monthly
Daily . *
. Average
Maximum , . °
Maximum
0.237 0.141
0.427 0.281
0.746 0.323
56.4 18.8
0.500 0.242
0.350 0.160
1.01 0.965
0.335 0.165
8.26 4.50
0.215 0.101
0.598 0.276
1.92 0.561
0.698 0.205
0.948 0.437
0.0731 0.0361
0.0537 0.0268
0.589 0.302
0.155 0.106
Appendix A - 9
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