[Code of Federal Regulations]
[Title 40, Volume 29]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR745.227]

[Page 562-569]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 745_LEAD-BASED PAINT POISIONING PREVENTION IN CERTAIN RESIDENTIAL 
STRUCTURES--Table of Contents
 
                  Subpart L_Lead-Based Paint Activities
 
Sec. 745.227  Work practice standards for conducting lead-based paint 
activities: target housing and child-occupied facilities.

    (a) Effective date, applicability, and terms. (1) Beginning on March 
1, 2000, all lead-based paint activities shall be performed pursuant to 
the work practice standards contained in this section.
    (2) When performing any lead-based paint activity described by the 
certified individual as an inspection, lead-hazard screen, risk 
assessment or abatement, a certified individual must perform that 
activity in compliance with the appropriate requirements below.
    (3) Documented methodologies that are appropriate for this section 
are found in the following: The U.S. Department of Housing and Urban 
Development (HUD) Guidelines for the Evaluation and Control of Lead-
Based Paint Hazards in Housing; the EPA Guidance on Residential Lead-
Based Paint, Lead-Contaminated Dust, and Lead-Contaminated Soil; the EPA 
Residential Sampling for Lead: Protocols for Dust and Soil Sampling (EPA 
report number 7474-R-95-001); Regulations, guidance, methods or 
protocols issued by States and Indian Tribes that have been authorized 
by EPA; and other equivalent methods and quidelines.
    (4) Clearance levels are appropriate for the purposes of this 
section may be found in the EPA Guidance on Residential Lead-Based 
Paint, Lead-Contaminated Dust, and Lead Contaminiated Soil or other 
equivalent guidelines.
    (b) Inspection. (1) An inspection shall be conducted only by a 
person certified by EPA as an inspector or risk assessor and, if 
conducted, must be conducted according to the procedures in this 
paragraph.
    (2) When conducting an inspection, the following locations shall be 
selected according to documented methodologies and tested for the 
presence of lead-based paint:

[[Page 563]]

    (i) In a residential dwelling and child-occupied facility, each 
component with a distinct painting history and each exterior component 
with a distinct painting history shall be tested for lead-based paint, 
except those components that the inspector or risk assessor determines 
to have been replaced after 1978, or to not contain lead-based paint; 
and
    (ii) In a multi-family dwelling or child-occupied facility, each 
component with a distinct painting history in every common area, except 
those components that the inspector or risk assessor determines to have 
been replaced after 1978, or to not contain lead-based paint.
    (3) Paint shall be sampled in the following manner: (i) The analysis 
of paint to determine the presence of lead shall be conducted using 
documented methodologies which incorporate adequate quality control 
procedures; and/or
    (ii) All collected paint chip samples shall be analyzed according to 
paragraph (f) of this section to determine if they contain detectable 
levels of lead that can be quantified numerically.
    (4) The certified inspector or risk assessor shall prepare an 
inspection report which shall include the following information:
    (i) Date of each inspection.
    (ii) Address of building.
    (iii) Date of construction.
    (iv) Apartment numbers (if applicable).
    (v) Name, address, and telephone number of the owner or owners of 
each residential dwelling or child-occupied facility.
    (vi) Name, signature, and certification number of each certified 
inspector and/or risk assessor conducting testing.
    (vii) Name, address, and telephone number of the certified firm 
employing each inspector and/or risk assessor, if applicable.
    (viii) Each testing method and device and/or sampling procedure 
employed for paint analysis, including quality control data and, if 
used, the serial number of any x-ray fluorescence (XRF) device.
    (ix) Specific locations of each painted component tested for the 
presence of lead-based paint.
    (x) The results of the inspection expressed in terms appropriate to 
the sampling method used.
    (c) Lead hazard screen. (1) A lead hazard screen shall be conducted 
only by a person certified by EPA as a risk assessor.
    (2) If conducted, a lead hazard screen shall be conducted as 
follows:
    (i) Background information regarding the physical characteristics of 
the residential dwelling or child-occupied facility and occupant use 
patterns that may cause lead-based paint exposure to one or more 
children age 6 years and under shall be collected.
    (ii) A visual inspection of the residential dwelling or child-
occupied facility shall be conducted to:
    (A) Determine if any deteriorated paint is present, and
    (B) Locate at least two dust sampling locations.
    (iii) If deteriorated paint is present, each surface with 
deteriorated paint, which is determined, using documented methodologies, 
to be in poor condition and to have a distinct painting history, shall 
be tested for the presence of lead.
    (iv) In residential dwellings, two composite dust samples shall be 
collected, one from the floors and the other from the windows, in rooms, 
hallways or stairwells where one or more children, age 6 and under, are 
most likely to come in contact with dust.
    (v) In multi-family dwellings and child-occupied facilities, in 
addition to the floor and window samples required in paragraph 
(c)(1)(iii) of this section, the risk assessor shall also collect 
composite dust samples from common areas where one or more children, age 
6 and under, are most likely to come into contact with dust.
    (3) Dust samples shall be collected and analyzed in the following 
manner:
    (i) All dust samples shall be taken using documented methodologies 
that incorporate adequate quality control procedures.
    (ii) All collected dust samples shall be analyzed according to 
paragraph (f) of this section to determine if they contain detectable 
levels of lead that can be quantified numerically.

[[Page 564]]

    (4) Paint shall be sampled in the following manner: (i) The analysis 
of paint to determine the presence of lead shall be conducted using 
documented methodologies which incorporate adequate quality control 
procedures; and/or
    (ii) All collected paint chip samples shall be analyzed according to 
paragraph (f) of this section to determine if they contain detectable 
levels of lead that can be quantified numerically.
    (5) The risk assessor shall prepare a lead hazard screen report, 
which shall include the following information:
    (i) The information required in a risk assessment report as 
specified in paragraph (d) of this section, including paragraphs 
(d)(11)(i) through (d)(11)(xiv), and excluding paragraphs (d)(11)(xv) 
through (d)(11)(xviii) of this section. Additionally, any background 
information collected pursuant to paragraph (c)(2)(i) of this section 
shall be included in the risk assessment report; and
    (ii) Recommendations, if warranted, for a follow-up risk assessment, 
and as appropriate, any further actions.
    (d) Risk assessment. (1) A risk assessment shall be conducted only 
by a person certified by EPA as a risk assessor and, if conducted, must 
be conducted according to the procedures in this paragraph.
    (2) A visual inspection for risk assessment of the residential 
dwelling or child-occupied facility shall be undertaken to locate the 
existence of deteriorated paint, assess the extent and causes of the 
deterioration, and other potential lead-based paint hazards.
    (3) Background information regarding the physical characteristics of 
the residential dwelling or child-occupied facility and occupant use 
patterns that may cause lead-based paint exposure to one or more 
children age 6 years and under shall be collected.
    (4) The following surfaces which are determined, using documented 
methodologies, to have a distinct painting history, shall be tested for 
the presence of lead:
    (i) Each friction surface or impact surface with visibly 
deteriorated paint; and
    (ii) All other surfaces with visibly deteriorated paint.
    (5) In residential dwellings, dust samples (either composite or 
single-surface samples) from the interior window sill(s) and floor shall 
be collected and analyzed for lead concentration in all living areas 
where one or more children, age 6 and under, are most likely to come 
into contact with dust.
    (6) For multi-family dwellings and child-occupied facilities, the 
samples required in paragraph (d)(4) of this section shall be taken. In 
addition, interior window sill and floor dust samples (either composite 
or single-surface samples) shall be collected and analyzed for lead 
concentration in the following locations:
    (i) Common areas adjacent to the sampled residential dwelling or 
child-occupied facility; and
    (ii) Other common areas in the building where the risk assessor 
determines that one or more children, age 6 and under, are likely to 
come into contact with dust.
    (7) For child-occupied facilities, interior window sill and floor 
dust samples (either composite or single-surface samples) shall be 
collected and analyzed for lead concentration in each room, hallway or 
stairwell utilized by one or more children, age 6 and under, and in 
other common areas in the child-occupied facility where one or more 
children, age 6 and under, are likely to come into contact with dust.
    (8) Soil samples shall be collected and analyzed for lead 
concentrations in the following locations:
    (i) Exterior play areas where bare soil is present; and
    (ii) The rest of the yard (i.e., non-play areas) where bare soil is 
present.
    (iii) Dripline/foundation areas where bare soil is present.
    (9) Any paint, dust, or soil sampling or testing shall be conducted 
using documented methodologies that incorporate adequate quality control 
procedures.
    (10) Any collected paint chip, dust, or soil samples shall be 
analyzed according to paragraph (f) of this section to determine if they 
contain detectable levels of lead that can be quantified numerically.
    (11) The certified risk assessor shall prepare a risk assessment 
report which

[[Page 565]]

shall include the following information:
    (i) Date of assessment.
    (ii) Address of each building.
    (iii) Date of construction of buildings.
    (iv) Apartment number (if applicable).
    (v) Name, address, and telephone number of each owner of each 
building.
    (vi) Name, signature, and certification of the certified risk 
assessor conducting the assessment.
    (vii) Name, address, and telephone number of the certified firm 
employing each certified risk assessor if applicable.
    (viii) Name, address, and telephone number of each recognized 
laboratory conducting analysis of collected samples.
    (ix) Results of the visual inspection.
    (x) Testing method and sampling procedure for paint analysis 
employed.
    (xi) Specific locations of each painted component tested for the 
presence of lead.
    (xii) All data collected from on-site testing, including quality 
control data and, if used, the serial number of any XRF device.
    (xiii) All results of laboratory analysis on collected paint, soil, 
and dust samples.
    (xiv) Any other sampling results.
    (xv) Any background information collected pursuant to paragraph 
(d)(3) of this section.
    (xvi) To the extent that they are used as part of the lead-based 
paint hazard determination, the results of any previous inspections or 
analyses for the presence of lead-based paint, or other assessments of 
lead-based paint-related hazards.
    (xvii) A description of the location, type, and severity of 
identified lead-based paint hazards and any other potential lead 
hazards.
    (xviii) A description of interim controls and/or abatement options 
for each identified lead-based paint hazard and a suggested 
prioritization for addressing each hazard. If the use of an encapsulant 
or enclosure is recommended, the report shall recommend a maintenance 
and monitoring schedule for the encapsulant or enclosure.
    (e) Abatement. (1) An abatement shall be conducted only by an 
individual certified by EPA, and if conducted, shall be conducted 
according to the procedures in this paragraph.
    (2) A certified supervisor is required for each abatement project 
and shall be onsite during all work site preparation and during the 
post-abatement cleanup of work areas. At all other times when abatement 
activities are being conducted, the certified supervisor shall be onsite 
or available by telephone, pager or answering service, and able to be 
present at the work site in no more than 2 hours.
    (3) The certified supervisor and the certified firm employing that 
supervisor shall ensure that all abatement activities are conducted 
according to the requirements of this section and all other Federal, 
State and local requirements.
    (4) A certified firm must notify EPA of lead-based paint abatement 
activities as follows:
    (i) Except as provided in paragraph (e)(4)(ii) of this section, EPA 
must be notified prior to conducting lead-based paint abatement 
activities. The original notification must be received by EPA at least 5 
business days before the start date of any lead-based paint abatement 
activities.
    (ii) Notification for lead-based paint abatement activities required 
in response to an elevated blood lead level (EBL) determination, or 
Federal, State, Tribal, or local emergency abatement order should be 
received by EPA as early as possible before, but must be received no 
later than the start date of the lead-based paint abatement activities. 
Should the start date and/or location provided to EPA change, an updated 
notification must be received by EPA on or before the start date 
provided to EPA. Documentation showing evidence of an EBL determination 
or a copy of the Federal/State/Tribal/local emergency abatement order 
must be included in the written notification to take advantage of this 
abbreviated notification period.
    (iii) Except as provided in paragraph (e)(4)(ii) of this section, 
updated notification must be provided to EPA for lead-based paint 
abatement activities that will begin on a date other than

[[Page 566]]

the start date specified in the original notification, as follows:
    (A) For lead-based paint abatement activities beginning prior to the 
start date provided to EPA an updated notification must be received by 
EPA at least 5 business days before the new start date included in the 
notification.
    (B) For lead-based paint abatement activities beginning after the 
start date provided to EPA an updated notification must be received by 
EPA on or before the start date provided to EPA.
    (iv) Except as provided in paragraph (e)(4)(ii) of this section, 
updated notification must be provided to EPA for any change in location 
of lead-based paint abatement activities at least 5 business days prior 
to the start date provided to EPA.
    (v) Updated notification must be provided to EPA when lead-based 
paint abatement activities are canceled, or when there are other 
significant changes including, but not limited to, when the square 
footage or acreage to be abated changes by more than 20%. This updated 
notification must be received by EPA on or before the start date 
provided to EPA, or if work has already begun, within 24 hours of the 
change.
    (vi) The following must be included in each notification:
    (A) Notification type (original, updated, cancellation).
    (B) Date when lead-based paint abatement activities will start.
    (C) Date when lead-based paint abatement activities will end 
(approximation using best professional judgement).
    (D) Firm's name, EPA certification number, address, telephone 
number.
    (E) Type of building (e.g., single family dwelling, multi-family 
dwelling, child-occupied facilities) on/in which abatement work will be 
performed.
    (F) Property name (if applicable).
    (G) Property address including apartment or unit number(s) (if 
applicable) for abatement work.
    (H) Documentation showing evidence of an EBL determination or a copy 
of the Federal/State/Tribal/local emergency abatement order, if using 
the abbreviated time period as described in paragraph (e)(4)(ii) of this 
section.
    (I) Name and EPA certification number of the project supervisor.
    (J) Approximate square footage/acreage to be abated.
    (K) Brief description of abatement activities to be performed.
    (L) Name, title, and signature of the representative of the 
certified firm who prepared the notification.
    (vii) Notification must be accomplished using any of the following 
methods: Written notification, or electronically using the Agency's 
Central Data Exchange (CDX). Written notification can be accomplished 
using either the sample form titled ``Notification of Lead-Based Paint 
Abatement Activities'' or similar form containing the information 
required in paragraph (e)(4)(vi) of this section. All written 
notifications must be delivered by U.S. Postal Service, fax, commercial 
delivery service, or hand delivery (persons submitting notification by 
U.S. Postal Service are reminded that they should allow 3 additional 
business days for delivery in order to ensure that EPA receives the 
notification by the required date). Instructions and sample forms can be 
obtained from the NLIC at 1-800-424-LEAD(5323), or on the Internet at 
http://www.epa.gov/lead.
    (viii) Lead-based paint abatement activities shall not begin on a 
date, or at a location other than that specified in either an original 
or updated notification, in the event of changes to the original 
notification.
    (ix) No firm or individual shall engage in lead-based paint 
abatement activities, as defined in Sec. 745.223, prior to notifying 
EPA of such activities according to the requirements of this paragraph.
    (5) A written occupant protection plan shall be developed for all 
abatement projects and shall be prepared according to the following 
procedures:
    (i) The occupant protection plan shall be unique to each residential 
dwelling or child-occupied facility and be developed prior to the 
abatement. The occupant protection plan shall describe the measures and 
management procedures that will be taken during the abatement to protect 
the building occupants from exposure to any lead-based paint hazards.

[[Page 567]]

    (ii) A certified supervisor or project designer shall prepare the 
occupant protection plan.
    (6) The work practices listed below shall be restricted during an 
abatement as follows:
    (i) Open-flame burning or torching of lead-based paint is 
prohibited;
    (ii) Machine sanding or grinding or abrasive blasting or 
sandblasting of lead-based paint is prohibited unless used with High 
Efficiency Particulate Air (HEPA) exhaust control which removes 
particles of 0.3 microns or larger from the air at 99.97 percent or 
greater efficiency;
    (iii) Dry scraping of lead-based paint is permitted only in 
conjunction with heat guns or around electrical outlets or when treating 
defective paint spots totaling no more than 2 square feet in any one 
room, hallway or stairwell or totaling no more than 20 square feet on 
exterior surfaces; and
    (iv) Operating a heat gun on lead-based paint is permitted only at 
temperatures below 1100 degrees Fahrenheit.
    (7) If conducted, soil abatement shall be conducted in one of the 
following ways:
    (i) If the soil is removed:
    (A) The soil shall be replaced by soil with a lead concentration as 
close to local background as practicable, but no greater than 400 ppm.
    (B) The soil that is removed shall not be used as top soil at 
another residential property or child-occupied facility.
    (ii) If soil is not removed, the soil shall be permanently covered, 
as defined in Sec. 745.223.
    (8) The following post-abatement clearance procedures shall be 
performed only by a certified inspector or risk assessor:
    (i) Following an abatement, a visual inspection shall be performed 
to determine if deteriorated painted surfaces and/or visible amounts of 
dust, debris or residue are still present. If deteriorated painted 
surfaces or visible amounts of dust, debris or residue are present, 
these conditions must be eliminated prior to the continuation of the 
clearance procedures.
    (ii) Following the visual inspection and any post-abatement cleanup 
required by paragraph (e)(8)(i) of this section, clearance sampling for 
lead in dust shall be conducted. Clearance sampling may be conducted by 
employing single-surface sampling or composite sampling techniques.
    (iii) Dust samples for clearance purposes shall be taken using 
documented methodologies that incorporate adequate quality control 
procedures.
    (iv) Dust samples for clearance purposes shall be taken a minimum of 
1 hour after completion of final post-abatement cleanup activities.
    (v) The following post-abatement clearance activities shall be 
conducted as appropriate based upon the extent or manner of abatement 
activities conducted in or to the residential dwelling or child-occupied 
facility:
    (A) After conducting an abatement with containment between abated 
and unabated areas, one dust sample shall be taken from one interior 
window sill and from one window trough (if present) and one dust sample 
shall be taken from the floors of each of no less than four rooms, 
hallways or stairwells within the containment area. In addition, one 
dust sample shall be taken from the floor outside the containment area. 
If there are less than four rooms, hallways or stairwells within the 
containment area, then all rooms, hallways or stairwells shall be 
sampled.
    (B) After conducting an abatement with no containment, two dust 
samples shall be taken from each of no less than four rooms, hallways or 
stairwells in the residential dwelling or child-occupied facility. One 
dust sample shall be taken from one interior window sill and window 
trough (if present) and one dust sample shall be taken from the floor of 
each room, hallway or stairwell selected. If there are less than four 
rooms, hallways or stairwells within the residential dwelling or child-
occupied facility then all rooms, hallways or stairwells shall be 
sampled.
    (C) Following an exterior paint abatement, a visible inspection 
shall be conducted. All horizontal surfaces in the outdoor living area 
closest to the abated surface shall be found to be cleaned of visible 
dust and debris. In addition, a visual inspection shall be conducted to 
determine the presence of paint chips on the dripline or next to

[[Page 568]]

the foundation below any exterior surface abated. If paint chips are 
present, they must be removed from the site and properly disposed of, 
according to all applicable Federal, State and local requirements.
    (vi) The rooms, hallways or stairwells selected for sampling shall 
be selected according to documented methodologies.
    (vii) The certified inspector or risk assessor shall compare the 
residual lead level (as determined by the laboratory analysis) from each 
single surface dust sample with clearance levels in paragraph 
(e)(8)(viii) of this section for lead in dust on floors, interior window 
sills, and window troughs or from each composite dust sample with the 
applicable clearance levels for lead in dust on floors, interior window 
sills, and window troughs divided by half the number of subsamples in 
the composite sample. If the residual lead level in a single surface 
dust sample equals or exceeds the applicable clearance level or if the 
residual lead level in a composite dust sample equals or exceeds the 
applicable clearance level divided by half the number of subsamples in 
the composite sample, the components represented by the failed sample 
shall be recleaned and retested.
    (viii) The clearance levels for lead in dust are 40 [mu]g/
ft2 for floors, 250 [mu]g/ft2 for interior window 
sills, and 400 [mu]g/ft2 for window troughs.
    (9) In a multi-family dwelling with similarly constructed and 
maintained residential dwellings, random sampling for the purposes of 
clearance may be conducted provided:
    (i) The certified individuals who abate or clean the residential 
dwellings do not know which residential dwelling will be selected for 
the random sample.
    (ii) A sufficient number of residential dwellings are selected for 
dust sampling to provide a 95 percent level of confidence that no more 
than 5 percent or 50 of the residential dwellings (whichever is smaller) 
in the randomly sampled population exceed the appropriate clearance 
levels.
    (iii) The randomly selected residential dwellings shall be sampled 
and evaluated for clearance according to the procedures found in 
paragraph (e)(8) of this section.
    (10) An abatement report shall be prepared by a certified supervisor 
or project designer. The abatement report shall include the following 
information:
    (i) Start and completion dates of abatement.
    (ii) The name and address of each certified firm conducting the 
abatement and the name of each supervisor assigned to the abatement 
project.
    (iii) The occupant protection plan prepared pursuant to paragraph 
(e)(5) of this section.
    (iv) The name, address, and signature of each certified risk 
assessor or inspector conducting clearance sampling and the date of 
clearance testing.
    (v) The results of clearance testing and all soil analyses (if 
applicable) and the name of each recognized laboratory that conducted 
the analyses.
    (vi) A detailed written description of the abatement, including 
abatement methods used, locations of rooms and/or components where 
abatement occurred, reason for selecting particular abatement methods 
for each component, and any suggested monitoring of encapsulants or 
enclosures.
    (f) Collection and laboratory analysis of samples. Any paint chip, 
dust, or soil samples collected pursuant to the work practice standards 
contained in this section shall be:
    (1) Collected by persons certified by EPA as an inspector or risk 
assessor; and
    (2) Analyzed by a laboratory recognized by EPA pursuant to section 
405(b) of TSCA as being capable of performing analyses for lead 
compounds in paint chip, dust, and soil samples.
    (g) Composite dust sampling. Composite dust sampling may only be 
conducted in the situations specified in paragraphs (c) through (e) of 
this section. If such sampling is conducted, the following conditions 
shall apply:
    (1) Composite dust samples shall consist of at least two subsamples;
    (2) Every component that is being tested shall be included in the 
sampling; and
    (3) Composite dust samples shall not consist of subsamples from more 
than one type of component.
    (h) Determinations. (1) Lead-based paint is present:

[[Page 569]]

    (i) On any surface that is tested and found to contain lead equal to 
or in excess of 1.0 milligrams per square centimeter or equal to or in 
excess of 0.5% by weight; and
    (ii) On any surface like a surface tested in the same room 
equivalent that has a similar painting history and that is found to be 
lead-based paint.
    (2) A paint-lead hazard is present:
    (i) On any friction surface that is subject to abrasion and where 
the lead dust levels on the nearest horizontal surface underneath the 
friction surface (e.g., the window sill or floor) are equal to or 
greater than the dust hazard levels identified in Sec. 745.227(b);
    (ii) On any chewable lead-based paint surface on which there is 
evidence of teeth marks;
    (iii) Where there is any damaged or otherwise deteriorated lead-
based paint on an impact surface that is cause by impact from a related 
building component (such as a door knob that knocks into a wall or a 
door that knocks against its door frame; and
    (iv) If there is any other deteriorated lead-based paint in any 
residential building or child-occupied facility or on the exterior of 
any residential building or child-occupied facility.
    (3) A dust-lead hazard is present in a residential dwelling or child 
occupied facility:
    (i) In a residential dwelling on floors and interior window sills 
when the weighted arithmetic mean lead loading for all single surface or 
composite samples of floors and interior window sills are equal to or 
greater than 40 [mu]g/ft2 for floors and 250 [mu]g/
ft2 for interior window sills, respectively;
    (ii) On floors or interior window sills in an unsampled residential 
dwelling in a multi-family dwelling, if a dust-lead hazard is present on 
floors or interior window sills, respectively, in at least one sampled 
residential unit on the property; and
    (iii) On floors or interior window sills in an unsampled common area 
in a multi-family dwelling, if a dust-lead hazard is present on floors 
or interior window sills, respectively, in at least one sampled common 
area in the same common area group on the property.
    (4) A soil-lead hazard is present:
    (i) In a play area when the soil-lead concentration from a composite 
play area sample of bare soil is equal to or greater than 400 parts per 
million; or
    (ii) In the rest of the yard when the arithmetic mean lead 
concentration from a composite sample (or arithmetic mean of composite 
samples) of bare soil from the rest of the yard (i.e., non-play areas) 
for each residential building on a property is equal to or greater than 
1,200 parts per million.
    (i) Recordkeeping. All reports or plans required in this section 
shall be maintained by the certified firm or individual who prepared the 
report for no fewer than 3 years. The certified firm or individual also 
shall provide copies of these reports to the building owner who 
contracted for its services.

[61 FR 45813, Aug. 29, 1996, as amended at 64 FR 42852, Aug. 6, 1999; 66 
FR 1239, Jan. 5, 2001; 69 FR 18496, Apr. 8, 2004]