	SF-83 SUPPORTING STATEMENT

	ENVIRONMENTAL PROTECTION AGENCY

	NSPS for Asphalt Processing and Roofing Manufacture (40 CFR part 60,
subpart UU)

1.  Identification of the Information Collection

1(a)  Title of the Information Collection

NSPS for Asphalt Processing and Roofing Manufacture (40 CFR part 60,
subpart UU)(Renewal)

1(b)  Short Characterization/Abstract

The New Source Performance Standards (NSPS) for Asphalt Processing and
Asphalt Roofing Manufacture were proposed on November 18, 1980, amended
on May 26, 1981, and promulgated on August 6, 1982.  These standards
apply to each saturator and each asphalt storage facility at asphalt
roofing plants; and to each asphalt storage tank and each blowing still
at asphalt processing plants, petroleum refineries, and asphalt roofing
plants.  New facilities include those that commenced construction,
modification or reconstruction after the date of proposal.  This
information is being collected to assure compliance with 40 CFR part 60,


subpart UU.

In general, all NSPS standards require initial notifications,
performance tests, and periodic reports.  Owners or operators are also
required to maintain records of the occurrence and duration of any
startup, shutdown, or malfunction in the operation of an affected
facility, or any period during which the monitoring system is
inoperative.  These notifications, reports, and records are essential in
determining compliance, and are required of all sources subject to NSPS.
 

Any owner or operator subject to the provisions of this part shall
maintain a file of these measurements, and retain the file for at least
two years following the date of such measurements, maintenance reports,
and records.  All reports are sent to the delegated state or local
authority.  In the event that there is no such delegated authority, the
reports are sent directly to the United States Environmental Protection
Agency (EPA) regional office.

Approximately 178 sources are currently subject to the regulation, and
it is estimated that two (2) existing sources will undergo
reconstruction and become new sources subject to the regulation per year
over the next three years.  Based on historical data provided by the
U.S. Census Bureau, we also estimate that nine (9) facilities currently
subject to the regulation will cease operations per year over the next
three years.  There were 83 sources identified in the previous
Information Collection Request (ICR) and a new growth rate of two (2)
sources per year.  The increase in the number of sources in this ICR
compared to the previous ICR is due to an error in estimating the number
of sources in the previous ICR.  The change in the estimated growth rate
from the previous ICR is due to the availability of new information
provided by the United States Census Bureau (USCB).

The Office of Management and Budget (OMB) approved the currently active
ICR without any (Terms of Clearance.(

2.  Need for and Use of the Collection

2(a)  Need/Authority for the Collection

The EPA is charged under Section 111 of the Clean Air Act (CAA), as
amended, to establish standards of performance for new stationary
sources that reflect: 

. . . application of the best technological system of continuous
emissions reduction which (taking into consideration the cost of
achieving such emissions reduction, or any non-air quality health and
environmental impact and energy requirements) the Administrator
determines has been adequately demonstrated.  Section 111(a)(l).

The Agency refers to this charge as selecting the best demonstrated
technology (BDT).  

Section 111 also requires that the Administrator review and, if
appropriate, revise such standards every four years.

In addition, section 114(a) states that the Administrator may require
any owner or operator subject to any requirement of this Act to: 

(A) Establish and maintain such records; (B) make such reports; (C)
install, use, and maintain such monitoring equipment, and use such audit
procedures, or methods; (D) sample such emissions (in accordance with
such procedures or methods, at such locations, at such intervals, during
such periods, and in such manner as the Administrator shall prescribe);
(E) keep records on control equipment parameters, production variables
or other indirect data when direct monitoring of emissions is
impractical; (F) submit compliance certifications in accordance with
Section 114(a)(3); and (G) provide such other information as the
Administrator may reasonably require.

In the Administrator's judgment, particulate matter emissions from
asphalt processing and roofing manufacture cause or contribute to air
pollution that may reasonably be anticipated to endanger public health
or welfare.  Therefore, the NSPS were promulgated for this source
category at 40 CFR part 60, subpart UU.



2(b)  Practical Utility/Users of the Data

The control of particulate matter emissions from asphalt processing and
roofing manufacture requires not only the installation of properly
designed equipment, but also the operation and maintenance of that
equipment.  Emissions of particulate matter from asphalt processing and
roofing manufacture are the result of the operation of the affected
facilities.  The subject standards are achieved by the capture of
particulate emissions using control devices such as electrostatic
precipitators, high velocity air filters, or afterburners.  The
notifications required in the applicable regulations are used to inform
the Agency or delegated authority when a source becomes subject to the
requirements of the regulations.  The reviewing authority may then
inspect the source to ensure that the pollution control devices are
properly installed and operated, that leaks are being detected and
repaired, and that the regulations are being met.  Performance test
reports are needed as these are the Agency's record of a source's
initial capability to comply with the emission standards, and to serve
as a record of the operating conditions under which compliance was
achieved.  The semiannual reports are used for problem identification,
as a check on source operation and maintenance, and for compliance
determinations.  The information generated by the monitoring,
recordkeeping and reporting requirements described in this ICR is used
by the Agency to ensure that facilities affected by the NSPS continue to
operate the control equipment in compliance with the regulation. 
Adequate monitoring, recordkeeping, and reporting are necessary to
ensure compliance with the applicable regulations, as required by the
Clean Air Act.  The information collected from recordkeeping and
reporting requirements is also used for targeting inspections, and is of
sufficient quality to be used as evidence in court.

3.  Nonduplication, Consultations, and Other Collection Criteria

The requested recordkeeping and reporting are required under 40 CFR part
60, 

subpart UU.

3(a)  Nonduplication

 If the subject standards have not been delegated, the information is
sent directly to the appropriate EPA regional office.  Otherwise, the
information is sent directly to the delegated state or local agency.  If
a state or local agency has adopted its own similar standards to
implement the Federal standards, a copy of the report submitted to the
state or local agency can be sent to the Administrator in lieu of the
report required by the Federal standards.  Therefore, no duplication
exists.

3(b)  Public Notice Required Prior to ICR Submission to OMB

An announcement of a public comment period for the renewal of this ICR
was published in the Federal Register (69 FR 29718) on May 25, 2004.  No
comments were received on the burden published in the Federal Register.



3(c)  Consultations

In estimating the burden associated with this standard, we contacted the
Asphalt Roofing Manufacturers Association (ARMA).  However, no response
was provided.  As an alternative, we used EPA(s Enforcement and
Compliance History Online (ECHO) database and United States Census
Bureau (USCB) data to estimate the number of sources and the growth rate
of the industry.  Based on these sources, there are approximately 178
sources currently subject to the regulation.  We also estimate two (2)
existing sources will undergo reconstruction and become new sources
subject to the regulation each year over the next three years.  Based on
historical data provided by the USCB, we estimate that nine (9) sources
currently subject to the regulation will cease operations each year over
the next three years.

The increase in the number of sources compared to the previous ICR is
due to an error in estimating the number of sources in the previous ICR.
 The change in the estimated growth rate from the previous ICR is due to
the availability of new information as provided by the USCB.

3(d)  Effects of Less Frequent Collection

Less frequent information collection would decrease the margin of
assurance that facilities are continuing to meet the standards. 
Requirements for information gathering and recordkeeping are useful
techniques to ensure that good operation and maintenance practices are
applied and emission limitations are met.  If the information required
by these standards was collected less frequently, the likelihood of
detecting poor operation and maintenance of control equipment and
noncompliance would decrease.

3(e)  General Guidelines

None of these reporting or recordkeeping requirements violate any of the
regulations established by OMB at 5 CFR part 1320, section 1320.5.

3(f)  Confidentiality

Any information submitted to the Agency for which a claim of
confidentiality is made will be safeguarded according to the Agency
policies set forth in Title 40, Chapter 1, part 2, subpart B -
Confidentiality of Business Information.  (See 40 CFR 2; 41 FR 36902, 

September 1, 1976; amended by 43 FR 40000, September 8, 1978; 43 FR
42251, 

September 20, 1978; 44 FR 17674, March 23, 1979).

3(g)  Sensitive Questions

None of the reporting or recordkeeping requirements contain sensitive
questions.



4.  The Respondents and the Information Requested

4(a)  Respondents/SIC Codes

The respondents to the recordkeeping and reporting requirements are
asphalt processing and roofing manufacture facilities.  The table below
provides a list of the United States Standard Industrial Classification
System (SIC) codes and corresponding North American Industry
Classification System (NAICS) codes for the respondents.

Standard	

SIC Codes	

NAICS Codes



40 CFR part 60, subpart UU	

2911 - Petroleum Refining	

324110 - Petroleum Refineries



	

2951 - Asphalt Paving Mixtures and Blocks	

324121 - Asphalt Paving Mixture and Block Manufacturing



	

2952 - Asphalt Felts 

and Coatings	

324122 - Asphalt Shingle and Coating Materials Manufacturing



4(b)  Information Requested

	

(i)  Data Items

All data in this ICR that are recorded and/or reported are required by
the NSPS for Asphalt Processing and Roofing Manufacture (40 CFR part 60,
subpart UU).			

A source must make the following reports:

Notification Reports



Notification of construction/reconstruction.	

60.7(a)(1)



Notification of actual startup.	

60.7(a)(3)



Notification of physical or operational change which may increase the
emission rate.	

60.7(a)(4)



Notification of demonstration of continuous monitoring system.	

60.7(a)(5)



Notification of initial performance tests.	

60.8(d)





Reports



Report on initial performance test.	

60.8(a)



A source must keep the following records:

Recordkeeping



Startups, shutdowns, malfunctions, periods where the continuous
monitoring system is inoperative.	

60.7(b)



Records of operating parameters of the Continuous Monitoring Systems
(CMS)	

Operating temperature measurements of pollution control devices as
appropriate, and the initial performance test results including
temperature measurements.	

60.7(d)

	

Continuously monitor and record the temperature of the gas at the inlet
of the control device.	

60.473(a)

	

Continuously monitor and record the temperature in the combustion zone
of the afterburner.	

60.472(b)(1)

	

For control devices not mentioned in paragraphs (a) and (b) of this
section, provide to the Administrator information describing the
operation of the control device and the process parameter(s) which would
indicate proper operation and maintenance of the device.	

60.473(c)



Records are required to be retained for two (2) years.	

60.7(f)



Electronic Reporting

Currently, sources are using monitoring equipment that provides
automated parameter data, e.g., continuous opacity monitoring.  Although
personnel at the affected facility must evaluate the data, this type of
monitoring equipment has significantly reduced the burden associated
with monitoring and recordkeeping.  In addition, some regulatory
agencies are setting up electronic reporting systems to allow sources to
report electronically.  This reduces the reporting burden.  However,
electronic reporting systems are not widely used by the regulatory
agencies.  It is estimated that approximately 10 percent of the
respondents use electronic reporting.

(ii)  Respondent Activities

Respondent Activities



Read instructions.



Install, calibrate, maintain, and operate temperature monitoring device.



Perform initial performance test, Reference Methods 5a, Method 9
(opacity), Method 22 and repeat performance tests if necessary.



Write the notifications and reports listed above.



Enter information required to be recorded above.



Submit the required reports developing, acquiring, installing, and
utilizing technology and systems for the purpose of collecting,
validating, and verifying information.



Develop, acquire, install, and utilize technology and systems for the
purpose of processing and maintaining information.



Develop, acquire, install, and utilize technology and systems for the
purpose of disclosing and providing information.



Adjust the existing ways to comply with any previously applicable
instructions 

and requirements.



Train personnel to be able to respond to a collection of information.



Transmit, or otherwise disclose the information.



5.  The Information Collected: Agency Activities, Collection
Methodology, and Information Management

5(a)  Agency Activities 

EPA conducts the following activities in connection with the
acquisition, analysis, storage, and distribution of the required
information.



Agency Activities



Observe initial performance tests and repeat performance tests if
necessary.



Review notifications and reports, including performance test reports,
and excess emissions reports, required to be submitted by industry.



Audit facility records.



Input, analyze, and maintain data in the Air Facility System (AFS).

5(b)  Collection Methodology and Management

Following notification of startup, the reviewing authority might inspect
the source to determine whether the pollution control devices are
properly installed and operated.  Performance test reports are used by
the Agency to discern a source(s initial capability to comply with the
emission standard.  Data and records maintained by the respondents are
tabulated and  published for use in compliance and enforcement programs.
 The semiannual reports are used for problem identification, as a check
on source operation and maintenance, and for compliance determinations.

Information contained in the reports is entered into the AFS which is
operated and maintained by EPA's Office of Compliance.  AFS is EPA(s
database for the collection, maintenance, and retrieval of compliance
data for approximately 125,000 industrial and government-owned
facilities.  EPA uses the AFS for tracking air pollution compliance and
enforcement by local and state regulatory agencies, EPA regional offices
and EPA headquarters.  EPA and its delegated Authorities can edit,
store, retrieve and analyze the data.

 The records required by this regulation must be retained by the owner
or operator for 

two years.

5(c)  Small Entity Flexibility

A majority of the affected facilities are large entities (e.g., large
businesses).  However, the impact on small entities (i.e., small
businesses) was taken into consideration during the development of the
regulation.  Due to technical considerations involving the process
operations and the types of control equipment employed, the
recordkeeping and reporting requirements are the same for both small and
large entities.  The Agency considers these requirements the minimum
needed to ensure compliance and, therefore, cannot reduce them further
for small entities.  To the extent that larger businesses can use
economies of scale to reduce their burden, the overall burden will be
reduced.

5(d)  Collection Schedule

The specific frequency for each information collection activity within
this request is shown in Table 1: Annual Respondent Burden and Cost,
NSPS for Asphalt Processing and Roofing Manufacture (40 CFR Part 60,
Subpart UU).

6.  Estimating the Burden and Cost of the Collection

Table 1 documents the computation of individual burdens for the
recordkeeping and reporting requirements applicable to the industry for
the subpart included in this ICR.  The individual burdens are expressed
under standardized headings believed to be consistent with the concept
of burden under the Paperwork Reduction Act.  Where appropriate,
specific tasks and major assumptions have been identified.  Responses to
this information collection are mandatory.

The Agency may not conduct or sponsor, and a person is not required to
respond to, a collection of information unless it displays a currently
valid OMB Control Number.

6(a)  Estimating Respondent Burden

The average annual burden to industry over the next three years from
these recordkeeping and reporting requirements is estimated to be 30,419
hours [Total Labor Hours from Table 1: Annual Respondent Burden and
Cost, NSPS for Asphalt Processing and Roofing Manufacture (40 CFR Part
60, Subpart UU), attached].  These hours are based on Agency studies and
background documents from the development of the regulation, Agency
knowledge and experience with the NSPS program, the previously approved
ICR, and any comments received.

6(b)  Estimating Respondent Costs

(i)  Estimating Labor Costs 

 

This ICR uses the following labor rates: 

Managerial	$95.32   ($45.39 + 110%)

Technical	$64.60   ($30.76 + 110%)

Clerical	$40.09   ($19.09 + 110%)

These rates are from the United States Department of Labor, Bureau of
Labor Statistics, December 2003, (Table 10. Private industry, by
occupational and industry group.(  The rates are from column 1, (Total
compensation.(  The rates have been increased by 110 percent to account
for the benefit packages available to those employed by private
industry.

(ii)  Estimating Capital/Startup and Operation and Maintenance Costs

 The type of industry costs associated with the information collection
activities in the subject standard(s) are both labor costs which are
addressed elsewhere in this ICR and the costs associated with continuous
monitoring.  The capital/startup costs are one-time costs when a
facility becomes subject to the regulation.  The annual operation and
maintenance costs are the ongoing costs to maintain the monitor(s) and
other costs such as photocopying and postage.

(iii)  Capital/Startup vs. Operation and Maintenance (O&M) Costs

Capital/Startup vs. Operation and Maintenance (O&M) Costs



(A)

Continuous Monitoring Device	

(B)

Capital/Startup Cost for One Respondent	

(C)

Number of Reconstructed Respondents 	

(D)

Total Capital/Startup Cost

(B X C)	

(E)

Annual O&M Costs for One Respondent	

(F)

Number of Respondents with O&M	

(G)

Total O&M,

(E X F)



Temperature Monitors	

$100,000	

2	

$200,000	

$35,000	

167	

$5,845,000



 	The total capital/startup costs for this ICR are $200,000.  This is
the total of column D in the above table.  These costs are shown on the
OMB 83-I form in block 14(a), Total annualized capital/startup costs.

The total operation and maintenance (O&M) costs for this ICR are
$5,845,000.  This is the total of column G.  These costs are shown on
the OMB 83-I form in block 14(b), Total annual costs (O&M).

The total respondent costs in block 14 have been calculated as the
addition of the capital/startup costs, and the annual operation and
maintenance costs.  The average annual cost for capital/startup and
operation and maintenance costs to industry over the next three years of
the ICR are estimated to be $6,045,000.  This cost is shown on the OMB
83-I form in block 14(c), Total annualized cost requested.  The numbers
in block 14 of the OMB 83-I form are rounded to show the cost in
thousands of dollars.  The continuous monitoring costs that are included
in this section consist only of those capital/startup and O&M costs that
a source incurs as a result of the standard.  Some continuous monitoring
costs may not be included in this section.  For instance, if a
particular industry typically utilizes a control device that must have a
continuous monitor (e.g., temperature, pressure drop, etc.) to function
properly, and the recordation of additional measurements beyond the
minimum are required by the standard, then there is no capital/startup
or O&M cost, but there is a labor cost to record the additional
readings.  Such a cost would not appear in this section, but in the
industry burden Section 6 (d) below.

6(c)  Estimating Agency Burden and Cost

The only costs to the Agency are those costs associated with analysis of
the reported information.  EPA's overall compliance and enforcement
program includes activities such as the examination of records
maintained by the respondents, periodic inspection of sources of
emissions, and the publication and distribution of collected
information.

The average annual Agency cost during the three years of the ICR is
estimated to 

be $3,848.

This cost is based on the average hourly labor rate as follows:

Managerial	$54.66   (GS-13, Step 5, $34.16 x 1.6)

Technical	$40.56   (GS-12, Step 1, $25.35 x 1.6)

Clerical	$21.95   (GS-6, Step 3, $13.72 x 1.6)

These rates are from the Office of Personnel Management (OPM) (2004
General Schedule( which excludes locality rates of pay.  Details upon
which this estimate is based appear in 

Table 2: Annual Agency Burden and Cost, NSPS for Asphalt Processing and
Roofing Manufacture (40 CFR Part 60, Subpart UU).

6(d)  Estimating the Respondent Universe and Total Burden and Costs

Based on our research for this ICR, approximately 169 existing sources
are currently subject to the standard.  Over the next three years, we
estimate that two (2) existing sources per year will undergo
reconstruction such that they will become a new source subject to the
standard.  Based on historical data provided by the United States Census
Bureau, we also estimate that nine (9) facilities currently subject to
the regulation will cease operations per year over the next 

three years.

Number of respondents is calculated using the following table which
addresses the three years covered by this ICR.

Number of Respondents1



	

Respondents That Submit Reports	

Respondents That Do Not Submit Any Reports	





Year	

(A)

Number of New Respondents	

(B)

Number of Existing Respondents	

(C)

Number of Existing Respondents That Keep Records but Do Not Submit
Reports	

(D)

Number of Existing Respondents That Are Also New Respondents	

(E)

Number of Respondents

(E=A+B+C-D)



1	

0	

2	

178	

2	

178



2	

0	

2	

169	

2	

169



3	

0	

2	

160	

2	

160



Average	

0	

2	

169	

2	

169

1We estimate that two (2) existing sources will undergo reconstruction
such that they are new sources.  We also estimate that the number of
existing respondents will decrease by approximate nine (9) respondents
per year of the next three years.

As shown above, the average Number of Respondents over the three-year
period of this ICR is 169.  This number appears on the OMB 83-I form in
block 13(a), Number of Respondents.

The total number of annual responses per year is calculated using the
following table: 

Total Annual Responses



(A)

Information Collection Activity	

(B)

Number of Respondents 	

(C)

Number of Responses	

(D)

Number of Existing Respondents That Keep Records But Do Not Submit
Reports	

(E)

Total Annual Responses 

E=(BxC)+D



Notification and application of construction or modification.	

2	

1	

N/A	

2



Notification of actual startup.	

2	

1	

N/A	

2



Notification of physical or operational change which may increase the
emission rate.	

2	

1	

N/A	

2



Notification of demonstration of continuous monitoring system.	

2	

1	

N/A	

2



Notification of initial performance tests.	

2	

1	

N/A	

2



Report on initial performance test.	

2	

1	

N/A	

2



Records of production rate and hours of operations	

169	

0	

169	

169



Records of operating parameters of CMS	

169	

0	

169	

169



Records of startup, shutdown, malfunction	

169	

0	

169	

169



	

	

	

Total	

519



The number of Total Annual Responses is 519.  This number is shown on
the OMB 83-I form in block 13(b), Total Annual Responses.

6(e)  Bottom Line Burden Hours Burden Hours and Cost Tables

The detailed bottom line burden hours and cost calculations for the
respondents and the Agency are shown in the attached Tables 1 and 2,
respectively, and are summarized on the following page.

(i) Respondent Tally

The Total Hours Requested is shown on the OMB 83-I form in block 13(c). 
The total annual labor costs are $1,940,874.  The annual labor costs are
not shown on the OMB 83-I form.  Details regarding these estimates may
be found in Table 1: Annual Respondent Burden and Cost, NSPS for Asphalt
Processing and Roofing Manufacture (40 CFR Part 60, Subpart UU),
attached.  Furthermore, the annual public reporting and recordkeeping
burden for this collection of information is estimated to average 58.6
hours per response.

The total annual capital/startup and O&M costs to the regulated entity
are $6,045,000.  This number is shown on the OMB 83-I form in block
14(c), Total annualized cost requested.  The cost calculations are
detailed in Section 6(b)(iii), Capital/Startup vs. Operation and
Maintenance (O&M) Costs.

(ii) The Agency Tally

The average annual Agency burden and cost over next three years is
estimated to be 

97 labor hours at a cost of $3,848.  See Table 2: Annual Agency Burden
and Cost, NSPS for Asphalt Processing and Roofing Manufacture (40 CFR
Part 60, Subpart UU), attached.

6(f)  Reasons for Change in Burden

The increase in burden from the most recently approved ICR is due to an
adjustment in the number of existing affected sources from 83 to 178. 
The reason for the change in the number of existing sources is due to
the availability of better data (e.g., EPA(s Enforcement and Compliance
History Online (ECHO) database and the U.S. Census Bureau(s 2002
Economic Census Reports).

6(g)  Burden Statement

The annual public reporting and recordkeeping burden for this collection
of information is estimated to average 58.6 hours per response.  Burden
means the total time, effort, or financial resources expended by persons
to generate, maintain, retain, or disclose or provide information to or
for a Federal agency.  This includes the time needed to review
instructions; to develop, acquire, install, and utilize technology and
systems for the purposes of collecting, validating, and verifying
information, processing and maintaining information, and disclosing and
providing information; to adjust the existing ways to comply with any
previously applicable instructions and requirements; to train personnel
to be able to respond to a collection of information; search data
sources; to complete and review the collection of information; and to
transmit or otherwise disclose the information.

An agency may not conduct or sponsor, and a person is not required to
respond to, a collection of information unless it displays a valid OMB
Control Number.  The OMB Control Numbers for EPA(s regulations are
listed at 40 CFR part 9 and 48 CFR chapter 15.

To comment on the Agency's need for this information, the accuracy of
the provided burden estimates, and any suggested methods for minimizing
respondent burden, including the use of automated collection techniques,
EPA has established a public docket for this ICR under Docket ID Number
OECA-2004-0013, which is available for public viewing at the Enforcement
and Compliance Docket and Information Center in the EPA Docket Center
(EPA/DC), EPA West, Room B102, 1301 Constitution Avenue, NW, Washington,
D.C.  The EPA Docket Center Public Reading Room is open from 8:30 a.m.
to 4:30 p.m., Monday through Friday, excluding legal holidays.  The
telephone number for the Reading Room is (202) 566-1744, and the
telephone number for the OECA Docket is (202) 566-1752.  An electronic
version of the public docket is available through EPA Dockets (EDOCKET)
at http://www.epa.gov/edocket.  Use EDOCKET to submit or view public
comments, access the index listing of the contents of the public docket,
and to access those documents in the public docket that are available
electronically.  When in the system, select (search,( then key in the
Docket ID Number identified above.  Also, you can send comments to the
Office of Information and Regulatory Affairs, Office of Management and
Budget, 725 17th Street, NW, Washington, D.C. 20503, Attention: Desk
Officer for EPA.  Please include the EPA Docket ID Number OECA-2004-0013
and OMB Control Number 2060-0002 in any correspondence.

Part B of the Supporting Statement

This part is not applicable because no statistical methods were used in
collecting 

this information.

  Asphalt Shingle and Coating Materials Manufacturing: 2002, 2002
Economic Census, Manufacturing Industry Series, U.S. Census Bureau,
ECO2-311-324122, August 2004

 PAGE  14 

