State/Local Spotlight:
Rhode Island Amends Nuisance Regulation
by Barbara Morin, Rhode Island Division of Air and Hazardous Materials
NATICH
NEWSLETTER
&ERA 453N91001
Office of Air Quality Planning and Standards
Research Triangle Park, North Carolina 27711
0 MJN?©©
State and Territorial Air Pollution Program Administrators
Association of Local Air Pollution Control Officials
Produced by the National Air Toxics Information Clearinghouse January 1991
In July 1990, Rhode Island
amended Air Pollution Control
Regulation No. 7, Emission of Air
Contaminants Detrimental to Per-
son or Property, one of the 22 air
pollution control regulations the
Department of Environmental
Management (DEM) enforces. The
regulation had consisted of a one-
sentence statement: "No person
shall emit any contaminant which
either alone or in connection with
other emissions, by reason of their
concentration or duration, may be
injurious to human, plant or animal
life, or cause damage to property
or which unreasonably interferes
with the enjoyment of life and
property." The lack of specificity
of the regulation has traditionally
given the DEM latitude in eval-
uating nuisance situations. How-
ever, in recent years this has
resulted in extensive debate over
what constitutes an adequate
demonstration of the lack of threat
to human, plant and animal life.
While the earlier version of the
standard continues to apply for ex-
isting sources, the health and wel-
fare impacts of new sources are
now evaluated by a standardized
set of criteria. Potential health im-
pacts are demonstrated by com-
pliance with (1) National Ambient
Air Quality Standards, (2) Accep-
table Ambient Levels listed in the
Air Toxics Regulation (Air Pollu-
tion Control Regulation No. 22), (3)
calculated Acceptable Ambient
Levels that are derived for pol-
lutants not regulated in the above
categories, and (4) the criteria in
the DEM document, "Guidelines
for Assessing Health Risks for
Proposed Air Pollution Sources."
These guidelines stipulate that
applicants for permits to construct
resource recovery plants or power
plants that are major sources and
have heat input capacities greater
than or equal to 250 million BTUs
per hour conduct multi-pathway
risk assessments using specified
procedures. The risk assessments
must include an evaluation of a
number of pollutants. Several ex-
posure pathways must also be
evaluated including inhalation of
indoor and outdoor air; ingestion of
soil, dust, water, vegetables, meat,
milk, fish, and mother's milk; and
dermal exposure to water, soil, and
dust. Health impacts are assessed
by comparing intake of each pollu-
tant via all applicable routes to the
corresponding EPA Oral Reference
Dose or Inhalation Reference
Concentration* as applicable for
each exposure route, as well as the
dose corresponding to a cancer
risk of 10"5 where applicable. Ap-
plicants must also evaluate
cumulative effects of exposure to
multiple pollutants by calculating
hazard indices (the sum of the
ratios of the intake of each pollu-
tant to the corresponding Oral
Reference Dose or Inhalation
Reference Concentration for each
exposure route) and total car-
cinogenic risk.
The guidelines also require a
simplified risk analysis from small
fossil fuel power plants having
(continued on page 2)
In This Issue
Air Pathway Analysis
Guide Revised 2
South Carolina Regulates
285 Air Toxics 2
New Mexico's Program
Addresses New and
Existing Sources 3
AEERL Develops Indoor
Air Pollution Document 4
Air RISC Responds to
Nickel, Styrene, and
Indoor Air Questions 5
New OAQPS Branch
Focuses on Emission Factors
and Inventories 6
OAQPS Updates
VOC/PM Species Data 6
EMTIC Activities
Highlighted 7

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Rhode Island (continued)
capacities greater than 100 million
BTUs per hour which do not meet
the above criteria, sewage sludge
incinerators and biomedical waste
incinerators. The guidelines specify
procedures to estimate soil impacts
and to evaluate the acceptability of
such impacts, considering both
carcinogenic and noncarcinogenic
health effects.
The DEM plans to update the
guidelines periodically to reflect
state-of-the-art procedures. For
more information or to get a copy
of the guidelines, contact Barbara
Morin at (401) 277-2808, Rhode
Island Division of Air and Hazar-
dous Materials, 291 Promenade
Street, Providence, Rhode Island
02908-5767.
*See related articles in the
Newsletter issues for July 1988 and
November 1990.
Air Pathway Analysis Guide Revised
The OAQPS has recently up-
dated and revised Volume II
(EPA-450/1-89-002) of the four
volume series of Air/Superfund
National Technical Guidance Study
Series. This series provides guid-
ance on conducting air pathway
analyses at Superfund hazardous
waste sites. The revised report,
EPA-450/l-89-002a, has received
review by the Air/Superfund
Technical Advisory Committee,
Regional Air/Superfund Coordi-
nators, and Superfund contractors
who will be using the report. It
presents available methods for
estimating air emissions at Super-
fund hazardous waste sites prior to
any remedial action. Estimation
methods include direct emission
measurement techniques, indirect
measurement methods, and predic-
tive emissions modeling. Techni-
ques are compared and case ex-
amples are provided. Specific revi-
sions to the report are:
•	Revised models for estimating
emissions from co-disposal
landfills;
•	New information on long path
monitoring;
•	Expansion of information on
measurement techniques and
emission models for PM and
VOC;
•	Comparison of estimation
methods on the basis of cost,
accuracy, complexity, time re-
quirements, sensitivity, ap-
plicable species, and data
outputs;
•	New information on assessing
impacts of indoor air quality of
homes or structures adjacent to
Superfund sites;
•	Inclusion of Superfund Exposure
Assessment Manual models;
•	Expansion of information on
emission models - the com-
parison, selection, and data in-
put of models; and
•	Inclusion of physical and
chemical property data for
selected compounds.
The volume is available
through the National Technical In-
formation Service (NTIS PB90-
270588). Revisions are planned as
new information becomes avail-
able. Comments on this document
may be sent to PEI Associates,
Inc., 3170 University Drive, Suite
201, Durham, North Carolina
27707.
South Carolina Regulates 258 Air Toxics
by J. Preston Campbell, South Carolina Department of Health and Environmental Control, Bureau of Air Quality Control
The Board of the South
Carolina Department of Health
and Environmental Control
(SCDHEC) approved Regulation
61-62.5, Standard No. 8 Toxic Air
Pollutants on August 9, 1990.
Originally proposed in 1987, the
regulation now includes both new
and existing sources, and sets a
2-year compliance date that starts
with the effective date of the
regulation. A total of 159 chem-
icals are listed, each with an
allowable ambient concentration
based on the ACGIH TLV or,
where TLVs were not established,
on OSHA Permissible Exposure
Limits, National Institute for
Occupational Safety and Health
Recommended Exposure Limits,
LC50 (inhalation concentration at
which 50 percent of the exposed
population dies) data, or another
recognized source. Each value is
then divided by a safety factor.
The pollutants are divided into
three categories based on chronic
exposure:
• Category I - Low Toxicity:
pollutants that cause readily
reversible changes that disap-
pear once exposure ends;
•	Category II - Moderate Toxicity:
pollutants that may cause
chronic reversible or irreversible
changes but that do not result in
death or permanent injury; and
•	Category III - High Toxicity:
pollutants that may cause
chronic effects that result in
death or permanent injury after
very brief exposure to small
quantities.
2

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South Carolina (continued)
The initial list of chemicals to
be regulated was developed after a
review of existing or proposed air
toxics regulations in nine States. In
addition, 37 chemicals under
assessment by the U.S. EPA at the
time were considered. The goal was
to include pollutants with chronic
rather than acute health effects be-
cause both dispersion models and
permit limits assume continuous
emissions (8760 hours). Chemicals
with no reported chronic health ef-
fects were automatically eliminated
from the list. In addition, chemicals
with few or no significant emission
sources in or likely to be in South
Carolina were deleted.
For sources with potential
emissions of any single toxic air
pollutant of 1,000 pounds per
month or greater, an operating per-
mit is required; permit require-
ments for smaller sources are ex-
amined on a case-by-case basis. All
sources must provide data on toxic
emissions. The same criteria apply
to the permitting of construction
projects. Toxic emissions data pro-
vided by the source will be used in
the latest versions of EPA air dis-
persion models to predict concen-
trations and determine compliance.
The SCDHEC held a public
hearing on November 2, 1990, on
the addition of 101 chemicals to
the air toxics regulation. These
chemicals are the hazardous air
pollutants in the Clean Air Act
Amendments of 1990 that South
Carolina was not yet regulating.
Sixteen statements were taken at
the hearing and 56 written com-
ments have been received. Approx-
imately two-thirds of the com-
ments were citizens in favor of tox-
ic air regulations; the rest were re-
quests from industry for various
modifications or clarifications.
With the passage of the Clean Air
Act Amendments, this list has
been shortened to 99 and SCDHEC
is currently considering the public
comments. They expect a revised
list to be in effect by June 1991.
For further information on the
South Carolina air toxics program,
contact Preston Campbell, Section
Manager, Air Toxics Section, or
M. K. Batavia, Director, Engineer-
ing Services Division, Bureau of
Air Quality Control, SCDHEC,
2600 Bull Street, Columbia, South
Carolina 29201, (803) 734-4750 or
Fax (803) 734-4556.
New Mexico's Program Addresses
New and Existing Sources
by Bill Blankenship, Program Manage^ Control Strategy Section, New Mexico Air Quality Bureau
When New Mexico began to
draft Air Quality Control Regula-
tions (AQCRs) in 1986, the Federal
National Emissions Standards for
Hazardous Air Pollutants program
did not adequately address air tox-
ics. In addition, the U.S. EPA was
encouraging States to develop an
air toxics program as part of the
National Air Toxics Strategy
through the Clean Air Act Section
105 grant process. At the State
level, the New Mexico Air Quality
Bureau did not have an air toxics
emissions inventory to use to iden-
tify areas for possible public health
concerns. Furthermore, the State
new source review program
primarily focuses on criteria
pollutants.
In December 1986, the State
Environmental Improvement
Board adopted AQCR 752-Regi-
stration of Existing Toxic Air
Pollution Sources, a one-time
reporting requirement for existing
sources. A second regulation that
expanded AQCR 702-Permits to
include new air toxics sources was
proposed but rejected. Following
revisions, the Board adopted
AQCR 702-Part Three-Permits for
Toxic Air Pollutant Emissions that
took effect December 31, 1988.
Registration of Existing Sources
Complete
The AQCR 752 required ex-
isting sources of air toxics to
register with the Bureau by
December 31, 1988. Toxic air
pollutants are defined as chemicals
with ACGIH TLVs (1986-1987).
The regulation specifies an emis-
sions threshold for potential uncon-
trolled sources that is calculated by
dividing the TLV by 15. This
value represents an emission rate
that produces 1 percent of the TLV
at the facility's fenceline, assuming
conservative stack parameters for
a hypothetical emission source.
The Bureau received over 400
responses that included all major
emitters. The final inventory con-
tained 92 facilities, a total of 321
point sources and 174 pollutants.
Table 1 shows emission totals for
ten pollutants. The State's inven-
tory is more comprehensive for
New Mexico than the EPA's Toxic
Release Inventory (only 11 sources
are required to report under SARA
Title III Section 313) because it
includes a longer list of pollutants,
more Standard Industrial Classifi-
cation Codes, and small sources
who report voluntarily.
Based on an analysis of the
reported data, the largest sources
are refineries, coal-fired power
plants, and copper smelters. The
Bureau began to develop a plan to
evaluate the need for specific
regulations for oil refineries.
However, with the passage of the
new Clean Air Act Amendments,
refinery emissions are expected to
3

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New Mexico (continued)
be controlled through operating
permits which would incorporate
any new Federal emission stan-
dards for refineries. The Bureau's
next step is to review the data
again and decide whether regula-
tions for other major industries are
needed.
New Sources Subject to Permitting
Under AQCR 702, emissions
of over 700 chemicals included in
the ACGIH list are subject to per-
mitting. New sources must eval-
uate their emissions potential prior
to construction and compare them
to specified emission thresholds
(calculated in the same manner as
in AQCR 752) to determine the
need to apply for a permit.
The Bureau begins the permit
review by determining the poten-
tial maximum 8-hour ambient con-
centration measured at the facili-
ty's fenceline. The permit is
granted if 0.1 percent of the TLV
is not exceeded; if exceeded, the
permit process becomes more com-
plex. Depending on whether the
pollutant is a carcinogen (defined
as those considered carcinogenic
Table 1.
Total Emissions for Select Pollutants
Substance Emitted Tons Per Year
Gasoline
6825.5
Nitrogen monoxide
1173.5
Sulfuric acid
865.4
Hydrogen sulfide
481.5
Hydrochloric acid
402.6
Ammonia
247.0
Asphalt fumes
215.5
Toluene
200.0
Quartz
193.5
Formaldehyde
38.0
by ACGIH), the second step varies.
For noncarcinogens, the appli-
cant must prepare a health assess-
ment. The Bureau reviews this and
decides whether emissions from
the new source will, with reason-
able probability, injure human
health.
If the source will emit a car-
cinogen, the permit application
must show that the applicant will
install the best available control
technology (BACT). Unlike the
Federal PSD program, the State
definition of BACT requires that
the facility consider process
changes and substitution of
materials. The control require-
ments are strictly technology
based; the regulation does not re-
quire that any residual health risk
be identified.
The permit requirements went
into effect on December 31, 1989.
As of mid-December 1990, only
one permit had been issued under
the new program, although several
applications are under review.
In addition to reevaluating
data collected under AQCR 752
and new source permits review
under AQCR 702 Part Three, New
Mexico will be evaluating and im-
plementing the new Clean Air Act
amendments. Also, they may pro-
mulgate their own air toxics
regulations on a case-by-case basis.
For more information on New
Mexico's air toxics program, con-
tact John Vance, New Mexico Air
Quality Bureau, 1190 St. Francis
Drive, Santa Fe, New Mexico
87503 or call (505) 827-0044.
AEERL Develops Indoor Air Pollution Sources Document
Although research by both the
U.S. EPA and the Consumer Pro-
duct Safety Commission indicates
that many building materials and
products commonly found in
homes and offices may be sources
of harmful air pollutants, no com-
plete characterization of the
sources has been done. The EPA's
Air and Energy Engineering
Research Laboratory (AEERL) has
undertaken a systematic approach
to identifying sources and their
potential to pollute indoor air.
The project is focusing on one
of five categories of indoor air
pollution sources; materials found
in homes or offices that are emis-
sion sources. The other sources in-
clude indoor combustion sources;
outdoor sources; biological sources;
and activities, such as vacuuming
or using photocopy machines,
which result in emissions to the in-
door air. Material sources include
construction materials, interior fix-
tures and furnishings, and con-
sumer products used in the
building.
The AEERL plans to present
the results in three documents.
The first report has been devel-
oped, and presents a classification
of building materials, fixtures and
furnishings, and consumer pro-
ducts used or found in homes or
offices, regardless of their potential
to emit air pollutants. The purpose
of this classification is to define the
universe of materials and products
in homes and offices, to create an
organized list of these materials
and products, and to establish a
nomenclature for future indoor air
quality work. The classification
will be developed by reviewing the
approximately 11,000 products for
which data are collected by the
Census of Manufactures and
presented in the Standard Indus-
trial Classification (SIC) Code
manual, and will be cross-refer-
enced by the architectural code,
Masterspec. Materials used in con-
nection with the construction of
homes and office buildings, as well
as products typically brought in-
side homes and offices, were iden-
tified. Products that were not rele-
vant, for example, industrial gases,
4

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(continued)
were eliminated. The final docu-
ment will contain all potential con-
struction materials or products
found in homes and office build-
ings organized by their respective
SIC Code.
The second report will be a
catalog of products taken from the
first report that are thought to be
potential sources of indoor air
pollution. Information on chemical
constituents, usage, and sources of
existing emissions data will be in-
cluded. To produce this catalog,
the first report will be reviewed
and products that are considered
to have little or no potential for
emissions will be eliminated. This
process will be based on a review
of the literature on indoor air emis-
sions and three criteria: the quanti-
ty of product produced, composi-
tional information (what chemicals
does the product contain), and the
nature of its use (what is the
likelihood of human exposure to
materials emitted). This report will
be helpful in identifying products
that may warrant further study to
establish their effect on indoor air.
The third report will serve as a
handbook for architects, building
contractors, and homeowners. It
will provide information on chemi-
cals that may be emitted from pro-
ducts, exposure, and low- or non-
emitting alternatives for a selected
group of commonly used materials
and products. The target audience
for this handbook will be archi-
tects, building contractors, and
homeowners who make decisions
on what types of building mater-
ials to use and what types of pro-
ducts to bring into their homes and
office buildings.
The first report was published
in October 1990, and is available
as EPA Report Number 600/8-90-
074. The catalog and handbook
documents are targeted for publi-
cation in fall 1991 and summer
1992, respectively.
For more information on these
indoor air documents, contact
James White, AEERL, at (919)
541-1189 or (FTS) 629-1189.
Air RISC Responds to Nickel, Styrene,
and Indoor Air Questions
The Air Risk Information Sup-
port Center (Air RISC) provides
technical assistance to State and
local air pollution control agencies
on air toxics questions pertaining
to health, exposure, and risk
assessment* Air RISC assistance
includes a hotline, in-depth tech-
nical evaluations and retrieval of
information, and broader technical
guidance. Air RISC received ap-
proximately 600 calls between Oc-
tober 1989 and September 1990.
Three requests are described as
examples of the types of assistance
that the Center provides.
In the first request, the State
of Maryland asked Air RISC to
confirm Maryland's risk assess-
ment approach for nickel com-
pounds. In their screening analysis
for nickel compounds, Maryland
made conservative exposure and
dose- response assumptions. All
nickel and nickel compounds with-
out potency factors are assumed to
be as toxic as nickel refinery dust
for which a potency factor has
been determined. The Center
recommended this approach in the
screening analysis. However, if a
source fails the screening analysis,
they recommended a source-
specific risk assessment based on
any health risk information avail-
able for the site and an alternate
potency factor. The alternate
potency factor should only be used
where the source can supply ade-
quate justification for its selection.
Air RISC has also received re-
cent requests from air pollution
control agencies in Kansas, Ver-
mont, Michigan, and Louisiana to
clarify EPA's position on the car-
cinogenicity of styrene. EPA's
Human Health Assessment Group
(HHAG) responded to these re-
quests with an explanation of the
Agency's ongoing review of the in-
halation data found in the 1986
EPA Drinking Water Criteria
Document. The HHAG stated that
styrene will receive a classification
of between Group D (not classifi-
able as to human carcinogenicity)
and Group B2 (probable human
carcinogen) once the Agency
releases either their final position
or a status report within the next
several months.
In the third call, representa-
tives from Virginia contacted Air
RISC seeking advise on an indoor
mold problem. A persistent odor
was thought to be causing them
severe esophagitis (inflammation
of the esophagus), dizziness,
numbness and confusion, and a
doctor had recommended they
abandon the house. The local and
State health departments were
unequipped to conduct a site visit.
Air RISC contacted EPA's Indoor
Air Office and specialists in
biological contaminants. Dr.
Harriet Burge at the University of
Michigan discovered an improperly
constructed flue in their home that
was trapping rainwater and harbor-
ing a large mold colony.
For assistance, the Air RISC
hotline telephone number is (919)
541-0888 or (FTS) 629-0888.
*See related articles in the
November 1988 and March 1990
issues.
5

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New OAQPS Branch Focuses on
Emission Factors and Inventories
Developing good estimates for
how much of a given pollutant is
being emitted and from what
sources has always been key to
determining proper controls and
program emphasis. The Clean Air
Act Amendments are expected to
increase the need for emission fac-
tors and inventories for both cri-
teria pollutants and air toxics. Con-
sequently, a new Emission Inven-
tory Branch in the Technical Sup-
port Division (TSD) of the EPA's
Office of Air Quality Planning and
Standards has been formed to be
the focal point of these activities.
This Branch replaces the criteria
pollutant emission factor/inventory
components of the Monitoring and
Reports Branch of TSD and the air
toxics emission factor/inventory
components of the Noncri^eria
Pollutant Programs Branch of the
Air Quality Management Division.
With a staff of 12, the Branch will
continue its predecessors' em-
phasis on technology transfer and
emission estimation technology im-
provements.
In addition to the recently
revised XATEF* data base, the
Branch has released SPECIATE
Version 1.32a (see inset). The
SPECIATE data base contains
speciation profiles for more than
300 VOC and PM sources each.
The Branch is also in the process
of developing an Emissions CD-
ROM disk and CHIEF, a new
bulletin board option in the TSD
bulletin board system.** The
Emissions CD will contain XATEF,
SPECIATE, AFSEF, a data base
containing criteria pollutant emis-
sion factors, the Locating and
Estimating Air Emissions from
Sources of (Pollutant) series of
reports, and AP-42. The Emissions
CD will be released in the summer
of 1991. The CHIEF, Clearing-
house for Inventories and Emission
Factors, is designed to provide
electronic bulletin board system
access to several tools for esti-
mating emissions of criteria and
toxic air pollutants. The CHIEF
will serve as a central clearing-
house for the latest information on
emission inventories and emission
factors, and is expected to be in
operation in January 1991.
For information on inventory
procedures for criteria pollutants
and air toxics, call (919) 541-0875;
for emission factor information,
call (919) 541-5522. For further in-
formation on XATEF, SPECIATE,
the Emissions CD, or CHIEF,
please contact Anne Pope, U.S.
EPA, MD-14, Research Triangle
Park, North Carolina 27711, or call
(919) 541-5373 or (FTS) 629-5373.
*See related articles in the March
1990 and September 1990 issues.
* *See related article in the
September 1990 issue.
OAQPS Updates
VOC/PM Species Data
The OAQPS has revised and expanded the "Air Emissions
Species Manual," (EPA-450/2-90-001a and b) and the VOC/PM
Species Data System* The new system, SPECIATE, presents
species profiles for both VOCs and PM. By applying the species
profiles to either total VOC or PM emissions estimates, the weight
percentage of specific VOCs or the elemental composition of PM
can be estimated for the source categories covered in the system.
SPECIATE now contains about 250 VOC profiles for 30 industrial
and nonindustrial source categories and over 300 PM profiles for 20
source categories.
The data base requires an IBM AT PC™ or compatible
machine that runs MS-DOS™ version 3.0 or later, at least 640 KB
of free RAM, a fixed disk drive with at least 5 MB of storage, and
a 5 1/4-inch external drive. The system is distributed on one high-
density (1.2 MB) 5 1/4-inch diskette with a user's manual.
Because of the large size of the manual (over 1500 pages), EPA
has discontinued making it available in hard copy and will only be
distributing the data on diskette. The diskette and manual are free
to government agencies and non-profit organizations through Anne
Pope, EPA, OAQPS, Emissions Inventory Branch, MD-14, Research
Triangle Park, North Carolina 27711, or call (919) 541-5373 or
(FTS) 629-5373. Private (for profit) requestors should order
through the National Technical Information Service or Radian Cor-
poration [contact Joel Watson at (919) 541-9100].
*See related articles in the November 1988 and March 1990 issues.
6

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EMTIC Activities Highlighted
The Emission Measurement
Technical Information Center
(EMTIC) was established in 1988
as an information exchange net-
work * Comprised of representa-
tives from EPA Headquarters,
Regional Offices, and State and
local agencies, EMTIC's goal is to
promote nationally consistent and
uniform application of Stationary
Source Emission test methods in
the development and enforcement
of emission control programs.
To this end, EMTIC has been
encouraging the development of a
national source testing accredita-
tion program. The EMTIC has
reviewed an outline prepared by
the Source Evaluation Society and
the Center is represented on the
EPA ad hoc panel on laboratory
accreditation.
In June 1990, EMTIC released
their first draft of the Test Method
Storage and Retrieval System
(TSAR), a computerized test
method information filing system.
The system contains emission
testing contacts and abstracts for
test methods, test reports, techni-
cal assistance records, and alter-
native test method evaluation pro-
cedures, decisions, and results.
Run on MS-DOS, TSAR allows
users to review, list, and print
abstracts selected through menus.
The EMTIC also provides in-
formation via its quarterly mailing.
The October package contained
several sampling and analysis
methods for nitrogen oxides, re-
cent relevant Federal Register
notices, and the Benzene Equip-
ment Leak Inspection Manual




—5M)
JiVFORM^^0
(EPA-340/1-90-001), among other
publications.
Other projects include produc-
ing videos and holding workshops.
Videos on PMio and VOC sam-
pling are available free to the
public; scripts for a VOC leak de-
tection video and a gas chroma-
tograph sampling (EPA Method
18) video are complete. The EM-
TIC plans several more videos
over the next year including ones
on multiple metals testing and
chromium emissions testing. Seven
workshops have also been com-
pleted and four more are sche-
duled for 1991. The general goal is
to provide an overview of technical
developments in emissions testing;
specific objectives for each work-
shop are tailored to the requests
from the Regional Office nearest
the workshop location.
For more information on
EMTIC or any of the Center's
projects, contact Roy Huntley,
EPA, MD-19, Research Triangle
Park, North Carolina 27711. The
EMTIC's telephone number is
(919) 541-2237 or (FTS) 629-2237.
The TSAR is available to the
private sector by joining the
Source Evaluation Society, Post
Office Box 12124, Research
Triangle Park, North Carolina
27709. The first year's dues are
$10.00. The public sector may ac-
cess TSAR through the OAQPS
Technical Support Division bulletin
board system.**
*See related articles in the March
1989 and September 1990 issues.
* *See the related article in the
September 1990 issue.
The NATICH Newsletter is published six times a year by the National Air Tbxics Information Clearinghouse. The Newsletter is
prepared by Radian Corporation under EPA Contract Number 68-D8-0065, Work Assignment 3-1. The EPA Project Officer is Martha
Keating, EPA Office of Air Quality Planning and Standards, Research Triangle Park, North Carolina 27711, Telephone: (919)541-5346.
The Radian Project Director is Susan Buchanan, P. O. Box 13000, Research Triangle Park, North Carolina 27709, (919)541-9100.
The Newsletter is distributed free of charge. To report address changes, write Meredith Haley, Radian Corporation, P. O. Box 13000,
Research Triangle Park, North Carolina 27709.
The views expressed in the NATICH Newsletter do not necessarily reflect the views and policies of the Environmental Protection
Agency. Mention of trade names or commercial products does not constitute any endorsement or recommendation for use by EPA.
Printed on recycled papee
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Martha Keating
Pollutant Assessment Branch
U.S. Environmental Protection Agency
MD-13
Research Triangle Park, NC 27711
FIRST CLASS MAIL
U.S. Postage Paid
E.P.A.
Permit No. G-35

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