UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF ENFORCEMENT AND COMPLIANCE ASSURANCE
EPA-330/9-97-001
PROCESS-BASED INVESTIGATION GUIDE
March 1997
Prepared by:
Steven W. Sisk
Gene Lubieniecki
Ken Garing
NATIONAL ENFORCEMENT INVESTIGATIONS CENTER
Diana A. Love, Director
Denver, Colorado
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CONTENTS
GUIDE FOR CONDUCTING PROCESS-BASED INVESTIGATION 1
WHAT IS THE PURPOSE OF THIS DOCUMENT? 1
WHAT IS A "PROCESS-BASED" INVESTIGATION? 1
WHY CONDUCT A PROCESS-BASED INVESTIGATION? 4
WHAT TYPE OF FACILITIES ARE APPROPRIATE FOR
THESE INVESTIGATIONS? 5
WHAT TYPE OF EXPERTISE IS DESIRABLE FOR
INDIVIDUAL/TEAM CONDUCTING THESE
INVESTIGATIONS? 5
WHAT ARE THE COMPONENTS OF A PROCESS-BASED
INVESTIGATION? 6
HOW TO PREPARE FOR A PROCESS-BASED
INVESTIGATION 7
Define Investigation Objective/Scope 7
Compiling/Evaluating Background Information 8
Team Formation/Interaction 11
Develop Inspection Plan/Strategy 12
HOW TO CONDUCT THE ON-SITE INSPECTION 14
Entry/Opening Conference 18
Evaluation of Facility Operations 19
Document Review 21
Interviews/Visual Inspection 23
Sampling/Monitoring 25
Closing Conference 25
HOW TO REPORT PROCESS-BASED INSPECTION
RESULTS 25
APPENDICES
A Sample Process Information Request
B Sample Responses to Information Requests
C Example TRIS Comparisons Between Similar Facilities
D Example Inspection Strategy
E Example Piping and Instrumentation Diagram (P&ID)
F Example Facility Water/Wastewater Balance Diagram
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CONTENTS (continued)
FIGURES
1 General Generic Processed-Based Investigation Focus Areas 3
2 Process-Based On-site Inspection Activities 15
3 Comprehensive Generic Process-Based Investigation Focus
Areas 17
TABLE
1 Example Major Waste Steam/Sources 28
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GUIDE FOR CONDUCTING PROCESS-BASED INVESTIGATIONS
WHAT IS THE PURPOSE OF THIS DOCUMENT?
The purpose of this document is to:
! Introduce and define the concept of "process-based" investigations
! Discuss the usefulness of this "tool"
! Provide a "road map" to planning and conducting these types of
investigations
This document focuses on the unique aspects of the "process-based"
investigation and is meant to supplement, not replace, general investigation or
media (law) specific protocol. The later guidance can be found in numerous
existing documents such as the basic training manual entitled "Conducting
Environmental Compliance Inspections" prepared by EPA Region 10 and the
"RCRA Inspection Manual." Therefore, in-depth discussion of issues, such as
sample collection or documentation of findings, is not provided here.
Examples presented in the document, although primarily focusing on iron
and steel making, are for illustration purposes only; the procedures discussed
are applicable to all types of manufacturing facilities.
WHAT IS A "PROCESS-BASED" INVESTIGATION?
A "process-based" investigation is an investigation that initially focuses
on, and is subsequently based on, a comprehensive understanding of the facility
processes.1 The process-based investigation includes tracking raw materials
1 "Processes," as used in this document, include all facility operations and activities,
including industrial and manufacturing operations, raw materials, product, co-
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through the industrial operations, identifying by-product, co-product and
products, identifying wastes generated, and determining how these wastes are
ultimately managed.
Figure 1 shows a general summary of the elements to be addressed and
evaluated in the early stages of a process-based investigation. This evaluation
provides the basis for addressing primary investigation objectives, such as
determining single or multimedia regulatory compliance status, identifying
pollution prevention opportunities, or providing compliance assistance.
Therefore, the purpose of a process-based investigation is not just to obtain an
in-depth understanding of facility processes, but to use this knowledge to
conduct more complete compliance monitoring, pollution prevention, compliance
assistance, etc., investigations.
The purpose of a process-based investigation is to obtain an in-depth
knowledge of facility operations and use this knowledge to make more
informed investigation evaluations and determinations. Process-
based investigations are appropriate for both single and multimedia
regulatory compliance evaluations, as well as other environmental
protection purposes.
For instance, if the overall investigation objective is to determine facility
compliance with Resource Conservation and Recovery Act (RCRA) requirements
(a single-media compliance evaluation), then facility processes will initially be
product, byproduct generation and waste management practices, and maintenance
activities. As used herein, an "investigation" comprises all activities from planning,
through on-site facility visit, to information evaluation, and report preparation. The
"investigation" includes an "inspection" which is the on-site facility visit.
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Raw
Materials
Air Emissions
Facility Processes
(all plant operations including
utilities, maintenance, etc.)
Waste Solids
Waste Liquids
By-Products
Co-Products
Intermediates
Products
Figure 1
GENERAL GENERIC PROCESSED-BASED INVESTIGATION FOCUS AREAS
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evaluated to identify all solid wastes and potential RCRA regulated hazardous
wastes and activities. A determination will then be made to identify actual
regulated wastes/activities. Finally, the compliance status of management of
each regulated wastestream and/or activity is determined.
WHY CONDUCT A PROCESS-BASED INVESTIGATION?
Heightened interest in industry sectors, in-depth and/or multimedia
compliance determinations, compliance assistance, pollution prevention, and
holistic plant evaluations has increased substantially during the past several
years. This interest has led to a necessary focus on waste producing operations
at manufacturing facilities, and a concurrent need for process-based
investigations.
Process-based investigations are, in many cases, the only method to:
! Determine the complete universe of regulated facility wastes/
activities
! Evaluate accuracy and completeness of facility self-reporting data/
permit application information
! Identify all actual or potential facility environmental impacts
! Obtain information important to permit development
! View the facility "holistically"
! Help ensure effective communication with facility personnel/
understanding of regulated wastes/activities
! Find pollution prevention and waste minimization opportunities
! Identify opportunities for supplemental environmental projects
(SEPs)
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Information obtained from process-based investigations can be used for
subsequent compliance determinations, as well as for compliance assistance and
pollution prevention endeavors. Such information has been used to help focus
limited regulatory resources on enforcement actions that address the more
egregious environmental problems, which might not have been apparent before
the investigation.
WHAT TYPE OF FACILITIES ARE APPROPRIATE FOR THESE
INVESTIGATIONS?
Process-based investigations can be conducted at, and may be appropriate
for, any size facility. Although they are inherently "multimedia" in scope and
are most effective when a complete facility evaluation is required, process-based
investigations have also proved appropriate during single-media or limited
scope activities. Although this guide is oriented toward evaluations at larger or
more complex facilities, normally conductedby multi-person teams, the methods
and principles can be readily applied to much smaller and simpler facilities that
may be visited by small teams or a single technical expert. The decision to
conduct a process-based investigation is based on numerous issues including
objectives, expected outcomes, and resource availability.
WHAT TYPE OF EXPERTISE IS DESIRABLE FOR TECHNICAL
EXPERTS CONDUCTING THESE INVESTIGATIONS?
As with other investigations, team make-up, including knowledge, skills,
and abilities, should be generally in-line with facility size, complexity, and
investigation objectives. Because an evaluation of industrial processes is
required, one or more investigators should have some knowledge (either first
hand or developed through background review, as discussed later) of the specific
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processes of the facility and wastestream treatment methods and technologies.
For multi-regulatory (multimedia) investigations, knowledge of multiple and
cross-program compliance issues is necessary.
A minimal team for a large complex process-based multimedia compliance
investigation would normally consist of inspectors familiar with the processes
to be investigated with expertise in air, water, and hazardous waste programs.
Ideally, the inspectors would be cross-trained in several other media programs
(such as Safe Drinking Water Act, Toxic Substances Control Act, etc.). This
level of experience may not be necessary at smaller, less complex facilities with
narrower investigation objectives that could be evaluated by a single
investigator with appropriate technical background.
WHAT ARE THE COMPONENTS OF PROCESS-BASED
INVESTIGATIONS?
In general, a process-based investigation can be divided into the following
three major activities.
1. Preparing for the investigation
2. Conducting the on-site inspection
3. Reporting investigation findings
The following guidance is organized by the above three activities.
Illustrative examples and specific discussions of some concepts are provided in
the appendices.
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HOW TO PREPARE FOR A PROCESS-BASED INVESTIGATION
As with any investigation, planning is a critical step in efficient and
effective execution of a process-based investigation. The various steps in proper
investigation planning are somewhat dependent on specific aspects and
requirements of each investigation. However, the following steps are virtually
always required.
! Define investigation objective(s) (identify purpose, desired end-
point, etc.) and scope (breadth and depth).
! Compile and evaluate facility background information (getting
"up-to-speed" with facility processes, regulatory requirements, and
special issues).
! Identify investigation "team" (choosing proper expertise mix or
individual).
! Develop investigation plan/strategy (on-site activities, logistics,
schedules).
Define Investigation Objectives/Scope
Probably the two most important "front end" tasks in preparing for the
investigation are defining investigation objective(s), and identifying project
scope because they are the basic building blocks for all subsequent activities.
Once defined, these two components enable investigators to identify what is to
be inspected, to what depth or level of detail, and for what purpose. This, in
turn, will dictate what background information should be compiled and
reviewed; the knowledge, skill, and experience mix needed in the investigation
team; and help define investigation strategy and required resources.
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While the overall focus of process-based investigations can vary from
compliance monitoring to compliance assurance, one common
objective is to obtain an understanding of facility processes to identify
all regulated wastes/operations. This provides information to
determine accuracy and completeness of facility self-reporting data.
Compiling/Evaluating Background Information
As with other investigations, the purpose of compiling and evaluating
available background information is to become "smarter" about the facility and
facility issues to ensure efficient use of on-site time and to help assure that
important issues are not "missed" during the on-site inspection.
Because one of the initial activities in a process-based investigation is an
evaluation of facility industrial operations and supporting activities in regards
to wastes/byproducts/co-products generated and actual/potential environmental
impacts, an understanding of facility operations is critical for a successful on-
site inspection. Therefore, in addition to reviewing information related to the
primary investigation objective(s), such as compliance monitoring, compliance
assistance, etc., it is important to compile and review background information
regarding facility operations.
To prepare for a process-based investigation, appropriate information
should be compiled and reviewed.
While the scope of this document is not to provide a complete inventory
of background information sources, the following have been found to be useful
in developing knowledge of both generic and specific processes.
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Kirk-Othmer Encyclopedia of Chemical Technology. Wiley, 3rd
ed., 1989; 4th ed. in publication process (basic process
information/flow diagrams)
U.S. EPA Effluent Guidelines Development Documents (process
information for most industrial sectors focussing on wastewater
generation)
U.S. EPA RCRA hazardous waste listing documents
Chemical Engineering Textbooks (basic process information)
Sector experts, knowledgeable technical contacts, and co-workers
U.S. EPA Sector Notebooks (overview of industry and operations)
Trade journals
Electronic process databases (e.g., Tomes by Micromedex,
Hazardous Substances Data Bank)
Dun & Bradstreet [facility Standard Industrial Classification (SIC)
codes]
Facility applications for air, wastewater discharge, and hazardous
waste management permits (site-specific information on processes/
activities associated with the generation of the regulated waste)
Information reported by the facility under the Emergency
Planning and Community Right-to-Know Act (EPCRA)
Reports of previous site inspections and discussions with the
inspectors (site-specific information on site operations and past
problems)
Computerized databases maintained by EPA and state media
programs
Occupational Safety and Health Administration (OSHA) inspector
reports (site processes and problem areas)
Formal Information Request [if inspection is to be announced,
submitting an information request under the various EPA/state
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authorities will provide site-specific process information (Appendix
A is an example of an information request letter requesting
process-based information.)]
Information obtained from the above sources should be viewed as a
starting point, not a comprehensive accounting of all facility processes and
identification of regulated wastestreams. Much of this information is "generic"
and may be obsolete or of minimal use because of company regulatory interpre-
tations, incomplete wastestream listings, and changing facility processes.
The extent and effort dedicated to gathering and evaluating back-
ground information is a function of investigation objectives, level of
available resources and facility complexity.
At a minimum, the investigator shouldbe well prepared andhave a basic
understanding of industrial operations/supporting activities and wastes
generated and can comfortably discuss associated issues with facility personnel.
For more complex facilities, it is often useful to develop a "conceptual model" of
the facility operations/activities and wastes generated (Appendix B provides
further information for building such a model).
At larger facilities, contractor operations may be integrated into plant
processes so that the contractors are actually the wastestream generator. Also,
some contractors treat or manage the solid/liquid wastestreams. Whether they
are the wastestream generator or manager, they may have reported their
activities to the regulatory agencies separate from the "host" facility. This
should be explored as part of the background information review. To do this, a
list of major facility contractors and their operations/functions should be
obtained, if possible, during background information gathering.
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Comparison of background information from the target facility to other,
similar type facilities often yields useful information. For example, TRIS emis-
sions data can be compared by obtaining database retrievals for facilities with
the same standard industrial classification (SIC) code(s). Gross differences
between facility reports can provide clues to process differences and identify
areas for further inquiry. Also, significant year to year differences and/or
increases/decreases in chemicals listed for the target facility could indicate
process or other changes that should be investigated (Appendix C is an example
of TRIS comparisons between several similar industrial facilities).
Additionally, information "gaps" should be identified so that the required
information is obtained during the on-site portion of the investigation.
In summary, the goal of the background information review is for the
investigator(s) to obtain knowledge of site processes, wastestreams generated,
and waste management operations based on generic and site-specific informa-
tion. This enables a preliminary understanding of plant processes, which must
be verified and revised while on-site. Regulations applicable to site activities,
regulated wastestreams, and significant contractor operations, as well as
information "gaps" are identified. Obviously, the size and complexity of the
facility and the investigation objectives will dictate the level of detail required
during the background review.
Team Formation/Interaction
As with all investigations, selection of the proper individual or team of
individuals is critical. The expertise should be consistent with investigation
objectives, level of available resources, and facility complexity. If a team is to
be used, communication between members is of critical importance. A team or
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project leader to coordinate team activities should be identified. The team
leader must encourage communications so that background information and
knowledge are freely shared throughout the investigation. This communication
of observations and cross-media impacts becomes the real strength of the team
and enables the comprehensive view of the facility, especially when all team
members cannot observe all operations.
Develop Investigation Plan/Strategy
An important facet to any investigation is developing the site-specific
plan. The purpose of the investigation plan is to identify investigation
objectives, activities, assignments, and time lines, help ensure that all team
members are aware of these issues, and that required information is obtained
during the investigation in an efficient and effective manner. To formulate an
effective plan, some knowledge of general facility operations, waste
management procedures, applicable regulations and available resources is
critical (and should be obtained during the background review). The scope
(breadth and depth) of the plan may be fairly simple or complex, and will vary
as a function of the investigation objectives and size and complexity of the target
facility. Most plans will include:
! General facility background, including known processes and
regulatory issues
! Investigation objectives
! Inspection activities
! Tentative schedule for investigation activities
! Safety plan
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For complex facilities, the investigation plan can also include prioritizing
the manufacturing operations and waste management activities to be evaluated.
A useful strategy used for evaluating facility operations is to follow material
flows through the plant. Material flows should be followed, to the extent
possible, beginning with raw material receiving and storage facilities; then to
manufacturing areas, utilities and maintenance areas, product storage facilities;
and finally, to waste management units. The strategy should be somewhat
flexible so that "mid-course corrections" can be made. Appendix D provides a
brief discussion of an inspection strategy used at a complex iron and steel
facility.
Depending on investigation objectives and focus, there may be a need for
sample collection. Samples might be needed for determining if a particular
wastestream is a characteristic hazardous waste, or verifying that a company
has adequately characterized a wastewater discharge. In any case, evaluation
of the need and purpose for sampling should be thoroughly evaluated to ensure
that proper samples are taken. Additionally, if sample collection is anticipated
or is a possibility, appropriate planning and documentation (such as preparation
of a Quality Assurance Plan) must be completed before going into the field.
A determination must be made whether to announce the inspection to the
facility or conduct an unannounced visit. This determination will depend on
various factors including inspection objectives, strategies, andpolicy and should
be made during the planning process.
An "announced" inspection, while providing an opportunity for the
facility to make changes to realign themselves with regulatory
requirements, helps ensure the presence of knowledgeable personnel
necessary to describe facility processes and allows the facility time to
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compile useful documents. However, both announced and
unannounced process-based inspections have successfully been
conducted.
If the inspection is to be announced, the investigators should take the
opportunity to obtain as much facility specific information as possible during
announcement communications. Company officials should identify major opera-
tions and their relationship to each other regarding material flows. If time
permits, a written request for process and contractor information can be
prepared and responded to by the company [Appendix A]. If this information
is not requested in advance, it should be requested during the on-site inspection.
An aspect of investigation planning that should not be overlooked is the
time/resources necessary to conduct a process-based evaluation. In general,
more time and expertise is required to conduct a process-based investigation as
compared to a typical "regulatory-based" investigation (where a complete
understanding of the facility processes is not usually obtained because the
initial focus is to evaluate the regulated units/activities based on facility self-
reporting). The additional time required could be as little as a couple of hours
to several days depending on the inspection scope and facility complexity as
identified during project planning. Resource limitations should be identified
during investigation planning so that realistic objectives can be met and
alternatives (such as a prioritizing processes to evaluate) can be developed.
HOW TO CONDUCT THE ON-SITE INSPECTION
The on-site portion of the process-based inspection, like most other
inspections, can be separated for purposes of discussion into various activities
[Figure 2 ], including:
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Entry/Opening conference
Evaluation of facility operations and activities (processes)
Document/records review
Interviews with facility personnel
Visual observations of selected areas
Sampling/monitoring
Closing conference
While these activities are discussed separately, the primary purpose of
most of these activities is to obtain information. The individual activities
(except for the opening and closing conferences) are "intermingled" throughout
the on-site inspection. Information obtained from each activity is used to "check
and balance" information obtained from the other sources in order to get the
most complete and accurate "picture" of facility processes.
Unlike most other inspections, the initial focus, and a continuing activity
throughout the process-based inspection, is obtaining a relatively
comprehensive understanding of facility manufacturing operations/facility
activities and how they relate to regulated wastes/activities and/or
environmental issues (although many inspections rely on at least a general
understanding of facility activities, the process-based inspection requires an in-
depth evaluation of waste generating operations/regulated activities). Figure 3
shows areas of focus for the process-based inspection. The investigator/
investigation team then uses this knowledge as a basis to carry out the major
objective of the investigation (compliance monitoring, compliance assistance,
pollution prevention, etc.).
The following discusses the above identified activities, as they relate
specifically to gaining an in-depth understanding of facility processes.
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Figure 3
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Raw Materials
Off-Site
Management
Air Emissions
Controls
Air Emissions
Facility Processes*
On-Site
Management
Solid Wastes
Solid Waste
Treatment
J\
Wastewater
Wastewater
Treatment
-> \ Release
Products and/or
Intermediates .
* Includes all facility operations, including maintenance, laboratories and utilities
Release
Sewer
Figure 3
COMPREHENSIVE GENERIC PROCESSED-BASED INVESTIGATION
FOCUS AREAS
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Entry/Opening Conference
During the opening conference, the company should provide an overview
of plant organization and processes. This information is used to identify (and
verify) major facility processes and can aid in scheduling subsequent interviews
and specific process inspections. For example, if Operation A and Operation B
are in different major organizational units (i.e., Divisions), it is unlikely that
interviews addressing them would be conducted concurrently.
Company safety procedures should also be discussed during the opening
conference.
Safety is an issue of increased concern during process-based inspec-
tions because potentially dangerous manufacturing areas, not
normally visited, may be thoroughly examined.
Company officials should be asked about special safety equipment or
training that may be required to enter specific plant areas. Investigators should
follow company safety procedures, as a minimum, and be alert for and comply
with, all warning signs. Experience has shown that not all plant personnel
have equal respect for safety procedures - safety must be the responsibility of
the investigator while on-site.
Other items that should be discussed during the opening conference are
similar to other type inspections, such as use of vehicles on-site, meeting times,
photograph policies, confidentiality, etc. Additionally, it is also useful at this
time to have the facility provide a conference room the team can use to review
documents, discuss issues, make phone calls, etc.
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Evaluation of Facility Operations
Evaluation of facility processes is usually accomplished in three steps.
1. Brief initial plant orientation tour
2. In-depth discussion of specific plant processes with facility
engineers (or other knowledgeable personnel) using flow
diagrams/blueprints
3. "Fine tuning" of facility knowledge throughout the remaining part
of the inspection through document review, visual observation,
further discussions with facility personnel and inspection team
interaction (obviously, on relatively simple facilities these steps
can be combined)
Process-based inspections may involve discussing, reviewing, and
possibly receiving confidential business information. Investigators
need to be sensitive to legitimate company concerns and ensure that
such information is protected in compliance with federal regulations
(40 CFR Part 2).
The general orientation plant tour (the "windshield tour") should be
provided for the investigation team as a group. Once the investigator/
investigation team has a general overview of facility operations, more detailed
discussions regarding processes take place. These may be conducted as a
complete team, or in smaller groups, depending on personnel, objectives, and
available resources.
The inspection team should ensure that knowledgeable personnel are
being interviewed about plant processes. These usually are the facility
operations managers and operators, but can include environmental staff.
Unless there is some overriding reason not to, a schedule of process staff
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interviews and operation inspections should be set up early in the inspection,
so that the company can plan ahead and minimize the disruption to plant
operations.
The process evaluation normally begins with interviews of operation and
activity managers, engineers, and operators. Later, the information obtained
is verified by records review and visual inspection. The initial process inter-
views are best done in a quiet office or conference room, not in the noisy process
area. Block process flow and/or piping and instrumentation diagrams (P&ID)
are reviewed starting with raw material received, processing, by-product,
product, and waste generation, step-by-step, to confirm all information and
ensure that no products, byproducts, residues, or wastestreams have been
omitted or misidentified. The generic/specific process information compiled
during investigation background information compilation/evaluation should be
used during interviews and plant tours to ensure all facets of the process and
resulting wastestreams are discussed.
Beware of industry-specific "terms of art," as they can be very
misleading. A "chilled brine" at one facility was actually methylene
chloride, which had leaked and contaminated the underlying
groundwater. The investigator must be willing to ask for clarification
where "terms of art" are suspected.
Some often overlooked issues/processes and activities include:
Recyclable material streams (the company may not consider them
to be wastes as they are not "disposed of)
Facility "support activities" such as maintenance, research
facilities, and laboratories may not be considered by the facility as
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"processes," but usually generate/manage regulated wastes and
should be included as part of facility operations evaluations.
! Chemical storage areas/mixing rooms that often contain
documents regarding types of substances/raw materials used
on-site [material safety data sheets (MSDS), material labels, etc.]
! Facility "utilities" such as boilers, power and water treatment
systems sometimes generate regulated wastes.
! Contractor activities, such as construction/demolition,
maintenance, and unit process operations can result in
environmental/noncompliance problems.
Process interviews can be time consuming, but need to be of adequate
detail and thorough enough so that major or environmentally significant
wastestreams are identified within the objectives and scope of the investigation.
If the process is understood, wastestreams identified, and waste management
practices discussed, it is probably time to proceed to other areas of inquiry.
The condition and age of plant sewers are of environmental interest,
especially at older plants. Leaking sewers can be contaminating the
underlying groundwater and may constitute illegal waste disposal.
Wastestreams discharged to nonmunicipal sewer systems may be
subject to RCRA hazardous waste and land disposal restriction
determinations. Consequently, questions about sewered wastes, sewer
inspection and repair programs, and inspection/repair records should
be asked.
Document Review
Document review is commonly used to supplement process knowledge
obtained during the in-depth process interviews, determine waste management
practices/facility compliance status, and identify compliance assistance and
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pollution/waste minimization opportunities. Review of documents can also be
used to verify previously provided information of facility operations (such as
information obtained during visual observation and interviews of plant
personnel) and identify actual or potential environmental problems. Document
review is normally conducted throughout the process-based on-site inspection.
While state and federal regulations require facilities to maintain and
have available many documents (shipping manifests, inspection records, etc.)
that are useful in identifying environmental management operations and
activities, the following documents have also been found to be useful in
evaluating facility processes.
! Facility map(s) showing buildings and waste management areas/
operations
! Plant personnel organization chart
! Piping and Instrumentation Diagrams (P&IDs) [Appendix E]
! Facility water/wastewater balance information [Appendix F]
! Plant sewer map(s) showing all building collection systems,
laterals and sewer mains, heat/material balance sheet(s) for the
process(es)
! Operation Manual for specific manufacturing or waste
management
! OSHA Process Safety Management Manual for Highly Hazardous
Chemicals (required by 29 CFR 1910.119)
! List of emission points or wastestreams that have: (a) required, or
(b) voluntary monitoring (includes air, sewers, land, surface water)
! List of imported or exported feedstock, recyclables, and waste
materials
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Excess air emissions reports
Spill logs
The information may be available in both paper copy and electronic
format. If available, electronic format may facilitate analysis and expedite
investigation report preparation. Information obtained during document review
should be compared with that reported by the facility and obtained from other
on-site activities to determine compliance and ensure an accurate picture of the
issues.
An important element of document review is to understand internally-
generated documents, how and when they are completed, the source of the
information contained, and how they relate to other documents. Information
from these documents are often critical in understanding facility operations and
waste generation, tracking and management activities.
Interviews/Visual Inspection
Verifying process information generally involves inspecting and further
discussing facility operations and waste management areas to ensure nothing
has been overlooked during the interviews or omitted from the flow diagrams.
This part of the inspection relies most heavily on investigator experience and,
at large or complex facilities, is better done by a team of at least two.
One strategy used to verify process information at complex facilities
requires two investigators working together: one tracks the facility
processes on flow and/or P&ID diagrams, while the other tracks
process and equipment (e.g., tanks, reactors, waste management units,
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etc.) locations on a plant site map. Both investigators should ask ques-
tions; however, the one tracking facility processes normally takes the
lead.
When appropriate (often while in process areas), the investigators should
ask operators about types and frequency of upsets, and how materials are
managed during upsets. As a courtesy and for safety reasons, the company
"guide" should be consulted before approaching an operator for questioning.
While in the operation area, look at each major unit or a "typical" major unit
shown on process flow diagrams, and identify wastestream points of generation
and management procedures, including the location of all pits, sumps, vents,
and stacks.
Team members need to be constantly alert for operations, materials,
tanks, and waste management activities not previously identified or discussed.
These could also include anything unusual: unmarked or unexplained drums,
visible emissions, odors, material piles, tanks, piping, open pipes near
drainages, ventilation, or structures because they may reveal operations or
waste handling activities not previously discussed. If discovered, the function
and purpose should be determined. The investigator should never assume that
there is a "good" and "regulatory compliant" explanation for an unusual item or
activity.
At one facility, a question about a specially ventilated sump cover
revealed the facility's concern about phosgene gas generation as a
process byproduct, although phosgene gas had not been identified as
a waste/byproduct during previous discussions.
All waste treatment systems associated with manufacturing wastes
should be inspected. Treatment system operators should be asked about upsets,
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influent and upstream monitoring, alarm locations and types, and problem or
upset notification by production staff. (The degree to which there is effective
communication can suggest the likelihood of treatment system upsets.)
Treatment system bypassing capabilities should be discussed with the operator,
as well as frequency of use. All treatment units and the flow options for each
need to be identified.
Sampling/Monitoring
As with other inspections, sampling or on-site monitoring can be useful
in gathering information about facility operations, including waste management
activities. Issues associated with sampling/monitoring, including identifying
clear objectives and Quality Assurance/Quality Control needs, do not differ
significantly from other types of inspections.
Closing Conference
The closing conference for process-based inspections does not normally
differ from that conducted during other types of inspections. However, if a
closing conference is conducted, the facility must be informed that information
provided is only preliminary and subject to change as a result of more thorough
evaluation.
HOW TO REPORT PROCESS-BASED INVESTIGATION RESULTS
Reporting results of a process-based investigation generally follow the
same basic rules for reporting of "regulatory-based" investigation results. No
single reporting format will satisfy the needs of all agencies conducting various
types of process-based investigations (compliance monitoring/compliance
25
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assistance, etc.). However, the following two points are emphasized to avoid
report problems.
1. As with all investigation reports, the principles of clear
presentation apply. This is especially important because process
descriptions can be very complex, and the information may not be
"usable" if the presentation is not "reader friendly."
The process presentation should start at the beginning of the
process (usually receipt/handling of raw materials) and work
systematically toward the end (product). Figures/flow diagrams
are extremely helpful and can eliminate (or supplement) the need
for complicated narrative and should be included wherever
possible. Because the objective of including a process description
in the report is to provide a clear foundation for identify-
ing/discussing facility problems/issues, the description should be
of sufficient detail to enable the reader to understand facility
operations associated with the identified issues/problems.
The narrative should identify all significant wastestreams, their
point of generation, and disposition, especially those wastestreams
that are associated with follow-up issues (noncompliance, pollution
prevention, compliance assistance, etc.). A summary table of
wastestreams can be very useful to readers [Table 1].
2. Confidential business information should be avoided in reports, if
at all possible, because of the resulting restrictions on subsequent
use and distribution. A separate "confidential" report, containing
the process information claimed confidential may be appropriate
26
-------
and would allow the nonconfidential information (usually the bulk
of the findings) to be used without constraint.
27
-------
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APPENDICES
A Sample Process Information Request
B Sample Responses to Information Requests
C Example TRIS Comparisons Between Similar Facilities
D Example Inspection Strategy
E Example Piping and Instrumentation Diagram (P&ID)
F Example Facility Water/Wastewater Balance Diagram
-------
APPENDIX A
EXAMPLE PROCESS INFORMATION REQUEST
-------
EXAMPLE PROCESS INFORMATION REQUEST
The information outlined in this request* is to assist us in understanding
your company's operations, identifying processes for inspection, and reducing
the time spent with process personnel. Information is requested for:
1. Coking
2. Sintering
3. Blast Furnaces
4. Basic Oxygen Furnace Shop
5. Hot Strip Mill
6. Cold Rolling Mills
7. Galvanizing Mills
8. Central Wastewater Treatment Plant (include any upstream
treatment units)
9. Plant Maintenance Operations (include garages and machine
shops)
10. Laboratories (research and development, process control and/or
environmental monitoring)
Specific information needs for these processes are identified below. The
information should be provided by .
1. Identify the building(s) in which processes or process groups are
located.
2. Provide a schematic for each process or process group (see attached
example). The schematic should, as a minimum, identify: (1)
what is being produced as products and byproducts, (2) process
steps and start-up date (month and year) for the current process
or process group.
3. On the schematic, identify each wastestream leaving the process
and its disposition (e.g., recovery, storage, discharge to sewers,
discharge to air, collection for off-site treatment/disposal, collection
for on-site treatment/disposal, etc.). Provide the state-assigned
Request may be formal (e.g., RCRA, 3007 letter) or informal (e.g., provided to company
contact by lead inspector).
-------
emission point source identification number for controlled air
discharges (i.e., having air pollution control devices) and indicate
the respective NPDES outfall for wastewater streams.
4. For each process indicate the presence of, as appropriate, side
sumps, pump stations, scale pits, and any hazardous waste
accumulation areas (55-gallons or more).
5. If a hazardous waste determination was made for a wastestream
or group of wastestreams identified on the schematic, please
provide results of that determination.
Contractor Operations
1. For the following contractors having operations at your plant,
please provide complete company names; mailing addresses;
principal contacts; and their telephone numbers, RCRA I.D.
numbers, if applicable; and briefly describe the services rendered.
a. Contractor 1
b. Contractor 2
c. Contractor 3
d. Contractor 4
e. Contractor 5
f. Contractor 6
g. Contractor 7
2. For the above listed contractors having operations at the your
plant, please provide the information indicated above, as
appropriate, in items 1 through 5, plus 6, as follows.
3. For each contractor, list any raw materials (feedstock) brought on-
site from off-site sources. If this raw material is also derived from
your plant, please indicate the approximate percentage derived
from on-site and off-site sources.
4. Please identify any other contractor who has on-site operations
involved in the processing; recovery; or reprocessing of raw
materials (feedstock), byproducts, intermediates, recyclable
materials, or wastes. For each contractor identified, please provide
the information indicated in item 1 above.
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APPENDIX B
DEVELOPING A DETAILED FACILITY PROCESS MODEL DURING
PLANNING
-------
Appendix B
DEVELOPING A DETAILED FACILITY PROCESS MODEL
DURING PLANNING
Preparation, as discussed here, focuses on identifying likely and/or known
operations, wastestreams, and applicable regulations. A conceptual model of
plant manufacturing operations, developed by investigation team members, is
often helpful in assimilating and displaying background information on the
facility. The model is typically based on both generic and site-specific
information; the level of detail is dependent on project scope and objectives,
information availability, member experience, and available time. A useful
model form is a process block flow diagram(s) to which information can be added
as it is obtained [Figures 1 and 2]. Process notes and questions are often
developed to supplement the diagram(s). The flow diagrams can be generated
using computer-based drawing programs, which are available to Agency
personnel through the local area networks.
If generic and site-specific information are used to develop the model,
judgement must be exercised in use of the composite information. At best, the
model developed during background information review only indicates what
conditions might be found at the inspected facility. The model should not be
assumed to portray actual site conditions, but should be considered continually
in draft form and updated whenever more accurate information is available,
such as during the on-site inspection.
-------
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APPENDIX C
EXAMPLE TRIS COMPARISONS BETWEEN SIMILAR FACILITIES
-------
EPCRA
EXAMPLE COMPARISON OF PETROLEUM REFINERY
FORM R SUBMITTALS
(Reporting Year Data - 1992)
Chemical
Refinery Size
(bbls/day)
Ammonia
Fugitive air
Stack air
Water
Land
Off-site
POTW
Ammonia Nitrate
Fugitive air
Benzene
Fugitive air
Stack air
Water
Land
Off-site
POTW
1,3 - Butadiene
Fugitive air
Stack air
N-butyl Alcohol
Fugitive air
Carbon Tetrachloride
Fugitive air
Carbonyl
Sulfide
Stack air
Chlorine
Fugitive air
Stack air
Chromium
Compounds
Fugitive air
Stack air
Water
Land
Off-site
POTW
Cobalt
Off-site
Refinery
• A
400,000
24,000
4,200
93
900
92
570
610
1,929
Refinery
B
300,000
420
900
230,000
71,000
112,000
68
1
390
930
51,000
11
500
1,200
4,300
4,528
Refinery
C
265,000
2,200
19,000
13,000
79
66
21,000
1,500
732
160
Refinery
D
130,000
170
550,000
250
4,500
6,200
210
10,000
15
16
5
1
175
75
8,100
Refinery
' • E" .
250,000
3,700
170,000
65,400
0
0
270,000
18,000
0
5,648
230
0
1,100
10,000
2,330
0
31,030
14,840
-------
Copper
Compounds
Fugitive air
Stack air
Water
Off-site
POTW
Cresol
Fugitive air
Stack air
Land
Cumene
Fugitive air
Stack air
Water
Off-site
Cyclohexane
Fugitive air
Stack air
Water
Land
Off-site
POTW
Dichlorodifluoro-
methane (CFC-12)
Fugitive air
1,2-Dichloro
ethane
Fugitive air
Stack air
Off-site
Diethanolamine
Water
Off-site
Ethylbenzene
Fugitive air
Stack air
Water
Land
Off-site
POTW
Ethylene
Fugitive air
Stack air
Ethylene Glycol
Stack air
Water
Formaldehyde
Fugitive air
Stack air
Water
Off-site
Glycol Ethers
Fugitive air
15,000
780
97
20,000
2,800
330
23,000
250
490
170,000
34,000
1,700
68
18,000
110,000
68
168,000
60,000
3,700
68
1
480
1,500
36,000
1,500
250
200
170
15
62
6,679
110
16,000
2,000
534
45,000
77
2
79
4,600
6,900
330
4,170
8,400
22
180
2,400
4
660
250
99
11
210
2,314
2,500
490
1,500
18,000
1,100
51
0
- 6,600
1,200
0
2,130
51,000
1,100
0
651
0
0
74,000
9,000
1
0
13,034
25,000
1,400
Note - This is not a complete table for refineries
-------
APPENDIX D
EXAMPLE INSPECTION STRATEGY
-------
Appendix D
EXAMPLE INSPECTION STRATEGY
Developing an inspection strategy involves prioritizing the manufacturing
processes and waste management activities with regard to inspection objectives
and, in consideration of these priorities, systematically moving from the
beginning to the end of an operation. Material flows should be followed, to the
extent possible, beginning with raw material receiving/storage facilities, then
to manufacturing areas. Utilities, maintenance, laboratory, and other activities
should also be addressed, as appropriate, and prioritized. The strategy should
be somewhat flexible so that "mid-course corrections" can be made. Finally, the
inspection strategy must include opportunities for team member interactions to
share observations and findings; daily meetings are suggested.
To illustrate an inspection strategy, based on the above factors, consider
the plant processes shown in Figure D-l. The facility was inspected by a team
consisting of an air inspector with a strong industrial process background, a
wastewater (CWAprogram) inspector with extensive treatment plant evaluation
experience, a RCRA inspector, and a project coordinator with a strong RCRA,
CWA, and industrial process background. The objectives included doing (1) a
thorough process-based inspection, (2) an evaluation of wastewater treatment
plant problems and sources, and (3) an evaluation of hazardous waste
management activities at the site.
The strategy developed involved the team initially splitting into three
subgroups (after the opening conference and site tour, as discussed below) and
later recombining into two subgroups. Initially, the coordinator and air
inspector went through the more complex air and solid waste producing
processes (coking, sintering, and blast furnaces). The wastewater inspector
-------
evaluated the on-site wastewater treatment plant, and the RCRA inspector went
to the regulated hazardous waste management units, which were being closed.
As the process evaluation proceeded "downstream," the inspectors
recombined into two teams. The wastewater inspector joined the coordinator to
inspect the hot and cold forming mills, which are major wastewater sources, and
the wastewater recycle systems. The air inspector was joined by the RCRA
inspector to look at the basic oxygen furnaces, the plate mill, contractor
operations, and the shops. These operations were judged more likely to
produce/manage solid and hazardous wastes and to have significant air
emissions and controls.
-------
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APPENDIX E
EXAMPLE PIPING AND INSTRUMENTATION DIAGRAM (P&ID)
-------
-------
APPENDIX F
EXAMPLE FACILITY WATER/WASTEWATER BALANCE DIAGRAM
-------
APPENDIX F
EXAMPLE FACILITY WATER/WASTEWATER
BALANCE DIAGRAM
LINE DRA WINGS FOR DISCHARGE NOS.
1.5 MOD
SS7
V_
I MOD
HOT STRIP MILL
BASEMENT SVMPS
0.5 MOD
HOT STRIP MILL
ROLL SHOP SUMP
OMGD
. 1STAND SHEET COLD REDUCTION
MILL PROCESS WATER
OMGD
4-STAND SHEET COLD REDUCTION
MILL PROCESS WATER
2MGD
t-STAND TIN COLD REDUCTION
MILL PROCESS WATER
.1MCD
NO. 7 CLEANING LINE PROCESS WATER
5-STAND SHEET COLD REDUCTION
MILL PROCESS WATER
PICKLE LINE PROCESS WATER
1MGD
PICKLE LINE PROCESS WATER
I MOD
PICKLE LINE PROCESS WATER
.1 MOD
NORTH SHEET TEMPER
MILL PROCESS WATER
.1MGD
HOT ROLLING TEMPER
MILL PROCESS WATER
JMGD
NO. f GALVANIZING LINE
PROCESS WATER
JMOD
NO. I GALVANIZING LINE
PROCESS WATER
.1MGD
NO. 1CONT. ANNEALING
PROCESS WATER
.1MGD
NO. 2 CONT. ANNEALING
PROCESS WATER
PROCESS WATER PUMPING STATION
.1MGD
' ' OILY WASTE FORCE MAIN
POND
0.1 MOD
4S" TEMPER MILL
STOKH WATEt tUNOFF
fOILSI SLOWDOWN
FILTEt BACIWASB
NO. I ELECTRO-GALVANIZE LINE
NON-CONTACT COOLING WATER
TIN DOUBLE COLD RED.
MILL PROCESS WATER
.2 MOD
.2 MOD
. NO. 1 ELECTRO-GALVANIZE
LINE PROCESS WATER
TERMINAL TREATMENT PLANT
NO. f API SEPARATOR
NO. 5 ELECTROLYTIC TINNING
LINE PROCESS WATER
JMGD
NO. 6 ELECTROLYTIC TINNING
LINE PROCESS WATER
.2 MOD
NO. I TIN FREE STEEL PROCESS WATER
.SHOD
CHROME TREATMENT FACILITY
WEST SHEET TEMPER
MILL PROCESS WATER
AMGD
2-STAND SHEET TEMPER
MILL PROCESS WATER
"S-I" PROCESS WATER
PUMPING STATION
PROCESS WATER
PUMPING STATION
TERMINAL TREATMENT PLANT -
NOS. 2,3,4,5 API SEPARATORS
TERMINAL TREATMENT PLANT
FLOCCULATOR CLARIFIERS
RIVER
S4" RECYCLE SLOWDOWN, MISC.
SHEET £ TIN COOLING
WATER, STORM WATER RUNOFF
(S4~ X 9t" SEWER)
-------
EXAMPLE OF PROCESS FLOW DIAGRAMS SHOWING
ADEQUATE LEVEL OF DETAIL
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