Moisture (by wt.)..................  20 PPM.....................  10 PPM................  20 PPM.
Noncondensable Gas (by vol.).......  N/A........................  2.0%..................  2.0%.
High Boiling Residues (by vol.)....  1.0%.......................  0.02%.................  0.02%.
Chlorides by Silver Nitrate Test...  No turbidity...............  No turbidity..........  No turbidity.
Particulates.......................  Visually clean.............  Visually clean........  Visually clean.
----------------------------------------------------------------------------------------------------------------

0
9. Revise Sec.  82.160 to read as follows:

Sec.  82.160  Approved equipment testing organizations.

    (a) Any equipment testing organization may apply for approval by
the Administrator to certify equipment under the standards in Sec.
82.158 and appendices B2, B3, B4, or C of this subpart. Applications
must be sent to<EMAIL_ADDRESS>or if containing confidential
business information, mailed to: Section 608 Program Manager;
Stratospheric Protection Division; Mail Code: 6205T; U.S. Environmental
Protection Agency; 1200 Pennsylvania Avenue NW., Washington, DC 20460.
    (b) Applications for approval must include:
    (1) A list of equipment present at the organization that will be
used for equipment testing.
    (2) Verification of the organization's expertise in equipment
testing and the technical experience of the organization's personnel.
    (3) Verification of the organization's knowledge of the standards
and recordkeeping and reporting requirements of this subpart.
    (4) A description of the organization's program for verifying the
performance of certified recovery and/or recycling equipment
manufactured over the long term, specifying whether retests of
equipment or inspections of equipment at manufacturing facilities will
be used.
    (5) Verification that the organization has no conflict of interest
and receives no direct or indirect financial benefit from the outcome
of certification testing.
    (6) Agreement to allow the Administrator access to records and
personnel to verify the information contained in the application.
    (c) Organizations may not certify equipment before receiving
approval from EPA. If approval is denied under this section, the
Administrator must give written notice to the organization setting
forth the basis for the determination.
    (d) If an approved testing organization conducts certification
tests in a way not consistent with the representations made in its
application or with the provisions of this subpart, the Administrator
may revoke approval in accordance with Sec.  82.169. In such cases, the
Administrator must give notice to the organization setting forth the
basis for the determination.
    (e) Recordkeeping and reporting. (1) Approved equipment testing
organizations must maintain records of equipment testing and
performance and a list of equipment that meets EPA requirements. This
list must include the name of the manufacturer and the name and/or
serial number of the model line. Approved equipment testing
organizations must publish online a list of all certified equipment
that includes the information specified above and update the list
annually.
    (2) Approved equipment testing organizations must notify EPA at
<EMAIL_ADDRESS>if retests of equipment or inspections of
manufacturing facilities conducted under to Sec.  82.158(i) show that a
previously certified model line fails to meet EPA requirements. Such
notification must be received within thirty days of the retest or
inspection.
0
10. Revise Sec.  82.161 to read as follows:

Sec.  82.161  Technician certification.

    Until [ONE YEAR FROM PUBLICATION OF A FINAL RULE IN THE FEDERAL
REGISTER], this section applies only to technicians and organizations
certifying technicians that maintain, service, or repair appliances
containing class I and class II refrigerants. Starting on [ONE YEAR
FROM PUBLICATION OF A FINAL RULE IN THE FEDERAL REGISTER], this section
applies to technicians and organizations certifying technicians that
maintain, service, or repair appliances containing any refrigerant as
defined in Sec.  82.152.
    (a) Requirements for Technicians. (1) Technicians must pass a
certification exam offered by an approved technician

certification program to work on different types of appliances, as
follows:
    (i) Technicians who maintain, service, or repair small appliances
must be certified as Type I technicians.
    (ii) Technicians who maintain, service, repair, or dispose of
medium-, high-, or very high-pressure appliances (except small
appliances, MVACs, and MVAC-like appliances) must be certified as Type
II technicians.
    (iii) Technicians who maintain, service, repair, or dispose of low-
pressure appliances must be certified as Type III technicians.
    (iv) Excluding persons who exclusively dispose of small appliances,
MVACs, and MVAC-like appliances, technicians who maintain, service,
repair, or dispose of appliances as described in paragraph (a)(1)(i)-
(iii) of this section must be certified as Universal technicians.
    (v) Technicians who maintain, service, or repair MVAC-like
appliances must either be certified as Type II technicians or be
certified by a training and certification program approved under Sec.
82.40.
    (vi) Technicians who maintain, service, or repair MVAC appliances
must be certified by a training and certification program approved
under Sec.  82.40.
    (2) Apprentices are exempt from the requirement in paragraph (a)(1)
of this section provided the apprentice is closely and continually
supervised by a certified technician while performing any maintenance,
service, repair, or disposal that could reasonably be expected to
release refrigerant from an appliance into the environment. The
supervising certified technician and the apprentice have the
responsibility to ensure that the apprentice complies with this
subpart.
    (3) The Administrator may require technicians to demonstrate at
their place of business their ability to perform proper procedures for
recovering and/or recycling refrigerant. Failure to demonstrate or
failure to properly use the equipment may result in revocation or
suspension of the certificate. Failure to abide by any of the
provisions of this subpart may also result in revocation or suspension
of the certificate. If a technician's certificate is revoked, the
technician would need to recertify before maintaining, servicing,
repairing, or disposing of any appliances.
    (4) Technicians certified under this section must keep a copy of
their certificate at their place of business.
    (5) Recertification. The Administrator reserves the right to
specify a requirement for technician recertification at some future
date, if necessary, by placing a notice in the Federal Register.
    (b) Requirements for Technician Certification Programs. (1) No
technician training or testing program may issue certificates under
this section unless the program complies with all the standards of this
section and appendix D, and has been granted approval by the
Administrator.
    (2) Program Approval. Persons may seek approval of any technician
certification program (program), in accordance with this paragraph, by
submitting to the Administrator at the address in Sec.  82.160(a)
verification that the program meets all the standards listed in
appendix D. The Administrator reserves the right to consider other
relevant factors to ensure the effectiveness of certification programs.
If approval is denied under this section, the Administrator must give
written notice to the program setting forth the basis for the
determination.
    (3) Alternative Examinations. Programs are encouraged to make
provisions for non-English speaking technicians by providing tests in
other languages or allowing the use of a translator when taking the
test. A test may be administered orally to any person who makes this
request, in writing, to the program at least 30 days before the
scheduled date for the examination. The written request must explain
why the request is being made.
    (4) Proof of Certification. Programs certifying technicians must
provide technicians with identification cards in accordance with
section (f) of appendix D of this subpart.
    (5) Programs certifying technicians must maintain records in
accordance with section (g) of appendix D of this subpart.
    (6) Starting January 1, 2018, programs certifying technicians,
excluding Federally-run programs, must create and maintain a publicly-
searchable database of technicians they have certified.
    (i) At a minimum, the database must include all technicians
certified after January 1, 2017.
    (ii) The database must provide the first name, middle initial, and
last name of the certified technician, the technician's city of
residence when taking the test, the type(s) of certification received,
and the date each certification was completed.
    (iii) Programs certifying technicians must provide notice to
technicians of their inclusion in the database in compliance with any
other federal, state or local regulations, and give technicians the
ability to opt out of being included in the database.
    (7) If an approved program violates any of the above requirements,
the Administrator may revoke approval in accordance with Sec.  82.169.
In such cases, the Administrator must give notice to the organization
setting forth the basis for the determination.
    (c) Test Subject Material. A bank of test questions developed by
the Administrator consists of groups, including a core group and
technical groups. The Administrator will release this bank of questions
only to approved technician certification programs. Each test for each
type of certification must include at least 25 questions drawn from the
core group and at least 25 questions drawn from each relevant technical
group. These questions must address the subject areas in appendix D.
0
11. Remove and reserve Sec.  82.162:

Sec.  82.162  [Reserved]

0
12. Revise Sec.  82.164 to read as follows:

Sec.  82.164  Reclaimer certification.

    (a) All persons reclaiming used refrigerant for sale to a new owner
must meet the following requirements:
    (1) Reclaim refrigerant to all the specifications in appendix A of
this subpart (based on AHRI Standard 700-2015, Specifications for
Refrigerants) that are applicable to that refrigerant;
    (2) Verify that each batch of refrigerant reclaimed meets these
specifications using the analytical methodology prescribed in appendix
A, which includes the primary methodologies included in the appendix to
the AHRI Standard 700-2015;
    (3) Release no more than 1.5 percent of the refrigerant during the
reclamation process;
    (4) Dispose of wastes from the reclamation process in accordance
with all applicable laws and regulations; and
    (5) Maintain records and submit reports in accordance with
paragraph (d) of this section.
    (b) The owner or a responsible officer reclaiming used refrigerant
for sale to a new owner, except for persons who properly certified
under this section before May 11, 2004, must certify to the
Administrator at the address in Sec.  82.160(a) that they will meet the
requirements in paragraph (a) of this section. The certification must
include the name and address of the reclaimer and a list of equipment
used to reclaim the refrigerant to the required standard, and to
analyze the refrigerant to ensure it meets these specifications.
    (c) Certificates are not transferable. In the event of a change in
ownership of an entity which reclaims refrigerant, the new owner of the
entity must certify with the Administrator within 30 days

of the change of ownership under this section. In the event of a change
in business management, location, or contact information, the owner of
the entity must notify EPA within 30 days of the change at the address
in Sec.  82.160(a).
    (d) Recordkeeping and reporting. (1) Reclaimers must maintain
records of the analysis conducted to verify that reclaimed refrigerant
meets the necessary specifications in paragraphs (a)(1) and (a)(2) of
this section.
    (2) Reclaimers must maintain records of the names and addresses of
persons sending them material for reclamation and the quantity of the
material (the combined mass of refrigerant and contaminants) by
refrigerant type sent to them for reclamation. Such records must be
maintained on a transactional basis for three years.
    (3) Reclaimers must report to the Administrator annually within 30
days of the end of the calendar year the total annual quantity of
material (the combined mass of refrigerant and contaminants) by
refrigerant type sent to them for reclamation, the total annual mass of
each refrigerant reclaimed, and the total annual mass of waste
products.
    (e) Failure to abide by any of the provisions of this subpart may
result in revocation or suspension of the certification of the
reclaimer in accordance with Sec.  82.169. In such cases, the
Administrator must give notice to the organization setting forth the
basis for the determination.
0
13. Amend section 82.166 by:
0
a. Removing and reserving paragraphs (a) through (i), and (l); and
0
b. Revising paragraph (m).
    Revisions to read as follows:

Sec.  82.166  Reporting and recordkeeping requirements.

    (a)-(i) [Reserved]
* * * * *
    (l) [Reserved]
    (m) All records required to be maintained pursuant to this section
must be kept for a minimum of three years unless otherwise indicated.
* * * * *
0
14. Amend subpart F by revising appendix A to read as follows:

APPENDIX A TO SUBPART F OF PART 82--SPECIFICATIONS FOR REFRIGERANTS

    This appendix is based on the Air-Conditioning, Heating, and
Refrigeration Institute Standard 700-2015, Specifications for
Refrigerants.

Section 1. Purpose

    1.1 Purpose. The purpose of this standard is to evaluate and
accept/reject refrigerants regardless of source (i.e., new,
reclaimed and/or repackaged) for use in new and existing
refrigeration and air-conditioning products as required under 40 CFR
part 82.
    1.1.1 Intent. This standard is intended for the guidance of the
industry including manufacturers, refrigerant reclaimers,
repackagers, distributors, installers, servicemen, contractors and
for consumers.
    1.1.2 Review and Amendment. This standard is subject to review
and amendment as the technology advances.

Section 2. Scope

    2.1 Scope. This standard specifies acceptable levels of
contaminants (purity requirements) for various fluorocarbon and
other refrigerants regardless of source and lists acceptable test
methods. These refrigerants are as referenced in the ANSI/ASHRAE
Standard 34 with Addenda:
    2.1.1 Single-Component Fluorocarbon Refrigerants: R-11, R-12, R-
13, R-22, R-23, R-32, R-113, R-114, R-115, R-116, R-123, R-124, R-
125, R-134a, R-141b, R-142b, R-143a, R-152a, R-218, R-227ea, R-
236fa, R-245fa, R-1233zd(E), R-1234yf, R-1234ze(E);
    2.1.2 Single Component Hydrocarbon Refrigerants: R-50, R-170, R-
E170, R-290, R-600, R-600a, R-601, R-601a, R-610, R-1150, R-1270;
    2.1.3 Carbon Dioxide Refrigerant: R-744;
    2.1.4 Zeotropic Blend Refrigerants: R-401A, R-401B, R-402A, R-
402B, R-403A, R-403B, R-404A, R-405A, R-406A, R-407A, R-407B, R-
407C, R-407D, R-407E, R-407F, R-408A, R-409A, R-409B, R-410A, R-
410B, R-411A, R-411B, R-412A, R-413A, R-414A, R-414B, R-415A, R-
415B, R-416A, R-417A, R-417B, R-417C, R-418A, R-419A, R-419B, R-
420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-422E, R-
423A, R-424A, R-425A, R-426A, R-427A, R-428A, R-429A, R-430A, R-
431A, R-434A, R-435A, R-437A, R-438A, R-439A, R-440A, R-442A, R-
444A, R-444B, R-445A, R-446A, R-447A, R-448A, R-49A, R-450A;
    2.1.5 Zeotropic Hydrocarbon Blend Refrigerants: R-432A, R-433A,
R-433B, R-433C, R-436A, R-436B, R-441A, R-443A; and
    2.1.6 Azeotropic Blend Refrigerants: R-500, R-502, R-503, R-
507A, R-508A, R-508B, R-509A, R-510A, R-511A, and R-512A.

Section 3. Definitions

    3.1 Definitions. All terms in this appendix will follow the
definitions in Sec.  82.152 unless otherwise defined in this
appendix.
    3.2 Shall, Should, Recommended, or It Is Recommended shall be
interpreted as follows:
    3.2.1 Shall. Where ``shall'' or ``shall not'' is used for a
provision specified, that provision is mandatory if compliance with
this appendix is claimed.
    3.2.2 Should, Recommended, or It is Recommended is used to
indicate provisions which are not mandatory but which are desirable
as good practice.

Section 4. Characterization of Refrigerants and Contaminants

    4.1 Characterization. Characterization of single component
fluorocarbon (Table 1A) and zeotropic/azeotropic blend (Table 2A/3)
refrigerants and contaminants are listed in the following general
classifications:
    4.1.1 Isomer content (see Table 1A)
    4.1.2 Air and other non-condensables (see Tables 1A, 2A, 3)
    4.1.3 Water (see Tables 1A, 2A, 3)
    4.1.4 All other volatile impurities (see Tables 1A, 2A, 3)
    4.1.5 High boiling residue (see Tables 1A, 2A, 3)
    4.1.6 Halogenated unsaturated volatile impurities (see Table 1A)
    4.1.7 Particulates/solids (see Tables 1A, 2A, 3)
    4.1.8 Acidity (see Tables 1A, 2A, 3)
    4.1.9 Chloride (see Tables 1A, 2A, 3)
    4.2 Hydrocarbon Characterization. Characterization of
hydrocarbon refrigerants (Tables 1B and 2B) and contaminants are
listed in the following general classifications:
    4.2.1 Nominal composition
    4.2.2 Other allowable impurities
    4.2.3 Air and other non-condensables
    4.2.4 Sulfur odor
    4.2.5 High boiling residue
    4.2.6 Particulates/solids
    4.2.7 Acidity
    4.2.8 Water
    4.2.9 All other volatile impurities
    4.2.10 Total C3, C4, and C5 polyolefins
    4.3 Carbon Dioxide Characterization. Characterization of carbon
dioxide (Table 1C) and its contaminants are listed in the following
general classifications:

    4.3.1 Purity
    4.3.2 Air and other non-condensables
    4.3.3 Water
    4.3.4 High boiling residue
    4.3.5 Particulates/solids

Section 5. Sampling and Summary of Test Procedures

    5.1 Referee Test. The referee test methods for the various
contaminants are summarized in the following paragraphs. Detailed
test procedures are included in Appendix C to AHRI Standard 700. If
alternative test methods are employed, the user must be able to
demonstrate that they produce results at least equivalent to the
specified referee test method.
    5.2 Refrigerant Sampling
    5.2.1 Sampling Precautions. Special precautions should be taken
to ensure that representative samples are obtained for analysis.
Sampling shall be done by qualified personnel following accepted
sampling and safety procedures. Refrigerants with critical
temperatures near or below ambient temperature cannot be reliably
sampled for both liquid and vapor phase without special handling.
    Note: Flammable refrigerants which are ASHRAE 34 class 2L, 2, or
3 present additional safety challenges and require additional
measures for sampling safety procedures compared to nonflammable
halocarbons documented in this standard.
    5.2.2 Cylinder Preparation. Place a clean, empty sample cylinder
with the valve open in an oven at 110 [deg]C (230 [deg]F) for one
hour. Remove it from the oven while hot, immediately connect it to
an evacuation system and evacuate to less than 56 kPa. Close the
valve and allow it to cool. Weigh the empty cylinder.

    5.2.3 Vapor Phase Sampling. A vapor phase sample shall be
obtained for determining the non-condensables. The source
temperature shall be measured and recorded at the time the sample is
taken.
    <IP_ADDRESS> Special Handling for Low Critical Temperature
Refrigerant. A vapor phase sample is required to determine non-
condensables and volatile impurities, including other refrigerants.
The vapor phase sample is obtained by regulating the sample
container temperature to 5 K or more above the refrigerant critical
temperature.
    <IP_ADDRESS> Handling for Liquid Refrigerants with Boiling Points
Near or Above Room Temperature. Since R-11, R-113, R-123, R-141b, R-
245fa, and R-1233zd(E) have normal boiling points near or above room
temperature, non-condensable determination is not required for these
refrigerants.
    Note: Non-condensable gases, if present, will concentrate in the
vapor phase of the refrigerant; care must be exercised to eliminate
introduction of either air or liquid phase refrigerant during the
sample transfer.
    5.2.4 Liquid Phase Sampling. A liquid phase sample is required
for all tests listed in this standard except the test for non-
condensables.
    <IP_ADDRESS> Liquid Sampling. Accurate analysis requires that the
sample cylinder, at ambient temperature, be filled to at least 60%
by volume; however, under no circumstances should the cylinder be
filled to more than 80% by volume. This can be accomplished by
weighing the empty cylinder and then the cylinder with refrigerant.
When the desired amount of refrigerant has been collected, close the
valve(s) and immediately disconnect the sample cylinder.
    Note: Care should be taken to ensure that all connections and
transfer lines are dry and evacuated to avoid contaminating the
sample.
    Note: Low critical temperature refrigerants can have extremely
high pressure and the sampling vessel, all connections, and transfer
lines must be designed to handle high pressures.
    <IP_ADDRESS> Special Handling for Low Critical Temperature
Refrigerant. A liquid phase sample is required for all testing
except volatile impurities, including other refrigerants. The liquid
phase sample is obtained by regulating the sample cylinder
temperature to 2 [deg]C below the critical temperature of the
refrigerant.
    Note: If free water is present in the sample, cooling to below 0
[deg]C may result in the formation of ice. Clathrates may form at
temperatures above 0 [deg]C with some fluorocarbon refrigerants.
    <IP_ADDRESS> Record Weight. Check the sample cylinder for leaks and
record the gross weight.
    5.3 Refrigerant Identification. The required method shall be gas
chromatography (GC) as described in Appendix C to AHRI Standard 700-
2015 with the corresponding gas chromatogram figures as illustrated
in Informative Appendix D to AHRI Standard 700. The chromatogram of
the sample shall be compared to known standards.
    5.3.2 Alternative Method. Determination of the boiling point and
boiling point range is an acceptable alternative test method which
can be used to characterize refrigerants. The test method shall be
that described in the Federal Specification for ``Fluorocarbon
Refrigerants,'' BB-F-1421 B, dated March 5, 1982, section 4.4.3.
    5.3.3 Required Values. The required values for boiling point and
boiling point range are given in Table 1A, Physical Properties of
Single Component Refrigerants; Table 1B, Physical Properties of
Zeotropic Blends (400 Series Refrigerants); and Table 1C, Physical
Properties of Azeotropic Blends (500 Series Refrigerants).
    5.4 Water Content.
    5.4.1 Method. The Coulometric Karl Fischer Titration shall be
the primary test method for determining the water content of
refrigerants. This method is described in Appendix C to AHRI
Standard 700-2015. This method can be used for refrigerants that are
either a liquid or a gas at room temperature. For all refrigerants,
the sample for water analysis shall be taken from the liquid phase
of the container to be tested.
    5.4.2 Limits. The value for water content shall be expressed in
parts per million (ppm) by weight and shall not exceed the maximum
specified in Tables 1A, 1B, 1C, 2A, 2B, and 3.
    5.5 Conductivity. (Alternative to chloride and acidity tests).
    5.5.1 Method. A refrigerant may be tested for conductivity as an
indication of the presence of acids, metal chlorides, and any
compound that ionizes in water. This alternative procedure is
intended for use with new or reclaimed refrigerants, however,
significant amounts of oil can interfere with the test results.
    5.5.2 Limits. The value for conductivity shall be converted to
and expressed in ppm by weight calculated as HCl and shall be
compared with the maximum acidity value specified (see in Tables 1A,
1B, 1C, 2A, 2B, and 3). If the conductivity is above this amount,
then the chloride and acidity tests shall be conducted. If the
conductivity is not greater than this amount, then the chloride and
acidity tests may be omitted.
    5.6 Chloride. The refrigerant shall be tested for chloride as an
indication of the presence of hydrochloric acid and/or metal
chlorides. The referee procedure is intended for use with new or
reclaimed halogenated refrigerants; however, high boiling residue in
excess of the amounts in Tables 1A, 1B, 1C, 2A, 2B, and 3 can
interfere with the test results.
    5.6.1 Method. The test method shall be that described in
Appendix C to AHRI Standard 700-2015. The test will show noticeable
turbidity at chloride levels of about 3 ppm or greater by weight.
    5.5.2 Limits. The results of the test shall not exhibit any sign
of turbidity. Report the results as ``pass'' or ``fail.''
    5.7 Acidity.
    5.7.1 Method. The acidity test uses the titration principle to
detect any compound that is soluble in water and ionizes as an acid.
The test method shall be that described in Appendix C to AHRI
Standard 700-2015. This test may not be suitable for determination
of high molecular weight organic acids; however these acids will be
found in the high boiling residue test outlined in Section 5.8. The
test requires a 50 to 60 gram sample and has a detection limit of
0.1 ppm by weight calculated as HCl.
    5.7.2 Limits. The value for acidity shall be expressed in ppm by
weight as HCl and shall not exceed the limits in Tables 1A, 1B, 2A,
2B, and 3.
    5.8 High Boiling Residue.
    5.8.1 Method. High boiling residue shall be determined by either
volume or weight. The volume method measures the residue from a
standard volume of refrigerant after evaporation. The gravimetric
method is described in Appendix C to AHRI Standard 700-2015. Oils
and/or organic acids will be captured by these methods.
    5.8.2 Limits. The value for high boiling residue shall be
expressed as a percentage by volume or weight and shall not exceed
the maximum percent specified in Tables 1A, 1B, 1C, 2A, 2B, and 3.
    5.9 Particulates and Solids.
    5.9.1 Method. A measured amount of sample shall be placed in a
Goetz bulb under controlled temperature conditions. The
particulates/solids shall be determined by visual examination of the
Goetz bulb prior to the evaporation of refrigerant. For details of
this test method, refer to Part 3 of Appendix C to AHRI Standard
700-2015.
    Note: R-744 will partially sublimate when measuring a known
amount of liquid sample into the dry Goetz bulb and the solid R-744
will interfere with the visual examination of particulates/solids.
Determining the particulates/solids shall be completed by visual
examination of the Goetz bulb after the evaporation of the
refrigerant.
    5.9.2 Limits. Visual presence of dirt, rust, or other
particulate contamination is reported as ``fail.''
    5.10 Non-Condensables.
    5.10.1 Method. A vapor phase sample shall be used for
determination of non-condensables. Non-condensable gases consist
primarily of air accumulated in the vapor phase of refrigerants
where the solubility of air in the refrigerant liquid phase is
extremely low and air is not significant as a liquid phase
contaminant. The presence of non-condensable gases may reflect poor
quality control in transferring refrigerants to storage tanks and
cylinders.
    The test method shall be gas chromatography with a thermal
conductivity detector as described in Appendix C to AHRI Standard
700-2015.
    5.10.2 Limits. The maximum level of non-condensables in the
vapor phase of a test sample shall not exceed the maximum at 25
[deg]C as shown in Tables 1A, 1B, 1C, 2A, 2B, and 3.
    5.11 All Other Volatile Impurities and/or Other Refrigerants.
    5.11.1 Method. The amount of volatile impurities including other
refrigerants in the subject refrigerant shall be determined by gas
chromatography as described in Appendix C to AHRI Standard 700-2015.
    5.11.2 Limits. The test sample shall not contain more than 0.5%
by weight of volatile impurities including other refrigerants as
shown in Tables 1A, 1B, 1C, 2A, 2B and 3.
    5.12 Total C3, C4 and C5 Polyolefins in Hydrocarbon
Refrigerants.
    5.12.1 Method. The amount of polyolefin impurities in the
hydrocarbon shall be

determined by gas chromatography as described in GPA STD 2177--
Natural Gas Liquid Mixtures Containing Nitrogen and Carbon Dioxide.
    5.12.2 Limits. The test sample shall not contain more than 0.05%
by weight in the hydrocarbon sample as shown in Tables 1B and 2B.
Report the results as ``pass'' or ``fail.''
    5.13 Sulfur Odor in Hydrocarbon Refrigerants.
    5.13.1 Method. The amount of sulfur containing compounds or
other compounds with an odor shall be determined by ASTM method
D1296, Odor of Volatile Solvents and Diluents.
    5.13.2 Limits. The test sample paper shall not emit a residual
sulfur odor as shown in Tables 1B and 2B.

Section 6. Reporting Procedure

    6.1 Reporting Procedure. The source (manufacturer, reclaimer, or
repackager) of the packaged refrigerant shall be identified. The
refrigerant shall be identified by its accepted refrigerant number
and/or its chemical name. Maximum allowable levels of contaminants
are shown in Tables 1A, 1B, 1C, 2A, 2B, and 3. Test results shall be
tabulated in a similar manner.

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APPENDIX A. REFERENCES--NORMATIVE

    Listed here are all standards, handbooks, and other publications
essential to the formation and implementation of the standard. All
references in this appendix are considered as part of this standard.
    ASHRAE Terminology, https://www.ashrae.org/resources--publications/free-resources/ashrae-terminology, 2014, American
Society of Heating, Refrigerating, and Air-Conditioning Engineers,
Inc.
    ANSI/ASHRAE Standard 34-2013, Designation and Safety
Classification of Refrigerants, with Addenda, American National
Standards Institute/American Society of Heating, Refrigerating, and
Air-Conditioning Engineers.
    Appendix C to AHRI Standard 700-2015: Analytical Procedures for
AHRI Standard 700-2015, Normative, Specification for Fluorocarbon
Refrigerants, 2008. Air-Conditioning, Heating, and Refrigeration
Institute.
    ASTM Standard D1296-01-2012, Standard Test Method for Odor of
Volatile Solvents and Diluents, 2012, ASTM International.
    GPA STD-2177, Analysis of Natural Gas Liquid Mixtures Containing
Nitrogen and Carbon Dioxide by Gas Chromatography, 2013, Gas
Processors Association.
    REFPROP Reference Fluid Thermodynamic and Transport Properties
NIST Standard Reference Database 23 version 9.1, 2013, U.S.
Department of Commerce, Technology Administration, National
Institute of Standards and Technology.

APPENDIX A. REFERENCES--INFORMATIVE

    Listed here are standards, handbooks, and other publications
which may provide useful information and background but are not
considered essential.
    2012 Appendix D Gas Chromatograms for AHRI Standard 700-2015--
Informative, Specification for Fluorocarbon Refrigerants, 2012, Air-
Conditioning, Heating, and Refrigeration Institute.
0
15. Amend subpart F by adding appendix B3 to read as follows:

APPENDIX B3 TO SUBPART F OF PART 82--PERFORMANCE OF REFRIGERANT
RECOVERY, RECYCLING, AND/OR RECLAIM EQUIPMENT

    This appendix is based on the Air-Conditioning, Heating, and
Refrigeration Institute Standard 740-2015, Performance Rating of
Refrigerant Recovery Equipment and Recovery/Recycling Equipment.

Section 1. Purpose

    1.1 Purpose. The purpose of this standard is to establish
methods of testing for rating and evaluating the performance of
refrigerant recovery, and/or recycling equipment and general
equipment requirements (herein referred to as ``equipment'') for
contaminant or purity levels, capacity, speed and purge loss to
minimize emission into the atmosphere of designated refrigerants.

Section 2. Scope

    2.1 Scope. This standard applies to equipment for recovering
and/or recycling single refrigerants, azeotropes, zeotropic blends,
and their normal contaminants from refrigerant systems. This
standard defines the test apparatus, test gas mixtures, sampling
procedures and analytical techniques that will be used to determine
the performance of refrigerant recovery and/or recycling equipment
(hereinafter, ``equipment''). Appendix B4 of this subpart
establishes standards for recovery/recycling equipment used with
flammable refrigerants.

Section 3. Definitions

    3.1 Definitions. All terms in this appendix will follow the
definitions in Sec.  82.152 unless otherwise defined in this
appendix.
    3.2 Clearing Refrigerant. Procedures used to remove trapped
refrigerant(s) from equipment before switching from one refrigerant
to another.
    3.3 High Temperature Vapor Recovery Rate. For equipment having
at least one designated refrigerant (see Section 11.2) with a
boiling point in the range of -50 to +10 [deg]C, the rate will be
measured for R-22, or the lowest boiling point refrigerant if R-22
is not a designated refrigerant.
    3.4 Published Ratings. A statement of the assigned values of
those performance characteristics, under stated rating conditions,
by which a unit may be chosen to fit its application. These values
apply to all units of like nominal size and type (identification)
produced by the same manufacturer. As used herein, the term
``published rating'' includes the rating of all performance
characteristics shown on the unit or published in specifications,
advertising, or other literature controlled by the manufacturer, at
stated rating conditions.
    3.5 Push/Pull Method. The push/pull refrigerant recovery method
is defined as the process of transferring liquid refrigerant from a
refrigeration system to a receiving vessel by lowering the pressure
in the vessel and raising the pressure in the system, and by
connecting a separate line between the system liquid port and the
receiving vessel.
    3.6 Recycle Flow Rate. The amount of refrigerant processed
divided by the time elapsed in the recycling mode. For equipment
which uses a separate recycling sequence, the recycle rate does not
include the recovery rate (or elapsed time). For equipment which
does not use a separate recycling sequence, the recycle rate is a
rate based solely on the higher of the liquid or vapor recovery
rate, by which the contaminant levels were measured.
    3.7 Residual Trapped Refrigerant. Refrigerant remaining in
equipment after clearing refrigerant.
    3.8 Shall, Should, Recommended or It Is Recommended shall be
interpreted as follows:
    3.8.1 Shall. Where ``shall'' or ``shall not'' is used for a
provision specified, that provision is mandatory if compliance with
this appendix is claimed.
    3.8.2 Should, Recommended or It Is Recommended is used to
indicate provisions which are not mandatory but which are desirable
as good practice.
    3.9 Standard Contaminated Refrigerant Sample. A mixture of new
or reclaimed refrigerant and specified quantities of identified
contaminants which constitute the mixture to be processed by the
equipment under test. These contaminant levels are expected only
from severe service conditions.
    3.10 Trapped Refrigerant. The amount of refrigerant remaining in
the equipment after the recovery or recovery/recycling operation but
before clearing refrigerant.
    3.11 Vapor Recovery Rate. The average rate that refrigerant is
withdrawn from the mixing chamber between two pressures as vapor
recovery rate is changing depending on the pressure. The initial
condition is vapor only at saturation pressure and temperature at
either 24 [deg]C or at the boiling point at 100 kPa, whichever is
higher. The final pressure condition is 10% of the initial pressure,
but not lower than the equipment final recovery vacuum and not
higher than 100 kPa.

Section 4. General Equipment Requirements

    4.1 Equipment Information. The equipment manufacturer shall
provide operating instructions, necessary maintenance procedures,
and source information for replacement parts and repair.
    4.2 Filter Replacement. The equipment shall indicate when any
filter/drier(s) needs replacement. This requirement can be met by
use of a moisture transducer and indicator light, by use of a sight
glass/moisture indicator, or by some measurement of the amount of
refrigerant processed such as a flow meter or hour meter. The
equipment manufacturer must provide maximum quantity recycled or
filter change interval in its written instructions.
    4.3 Purge of Non-Condensable. If non-condensables are purged,
the equipment shall either automatically purge non-condensables or
provide an indicating means to guide the purge process. Recycling
equipment must provide purge means.
    4.4 Purge Loss. The total refrigerant loss due to purging non-
condensables, draining oil, and clearing refrigerant (see Section
9.5) shall be less than 3% (by weight) of total processed
refrigerant.
    4.5 Permeation Rate. High pressure hose assemblies 5/8 in. (16
mm) nominal and smaller shall not exceed a permeation rate of 3.9 g/
cm\2\/yr (internal surface) at a temperature of 48.8 [deg]C. Hose
assemblies that UL recognized as having passed ANSI/UL 1963
requirements shall be accepted without testing. See Section 7.1.4.
    4.6 Clearing Trapped Refrigerant. For equipment rated for more
than one refrigerant, the manufacturer shall provide a method and
instructions which will accomplish connections and clearing within
15 minutes. Special equipment, other than a vacuum pump or manifold
gauge set, shall be furnished. The clearing procedure shall not rely
upon the storage cylinder below saturated pressure conditions at
ambient temperature.
    4.7 Temperature. The equipment shall be evaluated at 24 [deg]C
with additional limited evaluation at 40 [deg]C. Normal operating
conditions range from 10 [deg]C to 40 [deg]C.
    4.8 Exemptions. Equipment intended for recovery only shall be
exempt from Sections 4.2 and 4.3.

Section 5. Contaminated Refrigerants

    5.1 Sample Characteristics. The standard contaminated
refrigerant sample shall have the characteristics specified in Table
1, except as provided in Section 5.2. Testing shall be conducted at
an ambient temperature of 24 [deg]C 1 [deg]C except high
temperature vapor recovery shall be 40 [deg]C 1 [deg]C.
    5.2 Recovery-only Testing. Recovery equipment not rated for
removal of contaminants shall be tested with new or reclaimed
refrigerant.

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Section 6. Test Apparatus

    6.1 General Recommendations. The recommended test apparatus is
described in the following paragraphs. If alternate test apparatus
are employed, the user shall be able to demonstrate that they
produce results equivalent to the specified reference apparatus.
    6.2 Self-Contained Equipment Test Apparatus. The apparatus,
shown in Figure 1, shall consist of:
    6.2.1 Mixing Chamber. A mixing chamber consisting of a tank with
a conical-shaped bottom, a bottom port and piping for delivering
refrigerant to the equipment, various ports and valves for adding
refrigerant to the chamber, and stirring means for mixing.
    6.2.2 Filling Storage Cylinder. The storage cylinder to be
filled by the refrigerant transferred shall be cleaned and at the
pressure of the recovered refrigerant at the beginning of the test.
It will not be filled over 80%, by volume.
    6.2.3 Vapor Feed. Vapor refrigerant feed consisting of
evaporator, control valves and piping to create a 3.0 [deg]C
superheat condition at an evaporating temperature of 21 [deg]C
2 [deg]C.
    6.2.4 Alternative Vapor Feed. An alternative method for vapor
feed shall be to pass the refrigerant through a boiler and then
through an automatic pressure regulating valve set at different
saturation pressures, moving from saturated pressure at 24 [deg]C to
final pressure of recovery.
    6.2.5 Liquid Feed. Liquid refrigerant feed consisting of control
valves, sampling port, and piping.
    6.2.6 Instrumentation. Instrumentation capable of measuring
weight, temperature, pressure, and refrigerant loss, as required.
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    6.3 Size. The size of the mixing chamber and filling storage
cylinder used during testing shall correspond to the size of the
equipment being tested per Section 6.3.1 or 6.3.2:
    6.3.1 For equipment utilizing nominal \1/4\'' or \3/8\'' flare
ports and hoses, the mixing chamber shall be 0.09 m\3\ and all
ports, valves, mixing valves, and piping shall be \1/2\'' or larger,
reduced down to the port size of the equipment by fittings at the
connection ports of the mixing chamber. The filling storage cylinder
used during testing shall be a nominal 50-pound water capacity DOT
4Bx cylinder with \1/4\'' flare liquid and vapor ports.
    6.3.2 For equipment utilizing \1/2\'' or larger flare ports and
hoses, the mixing chamber shall be 0.45 m\3\ (or nominal 1000-pound
water capacity DOT 4Bx cylinder) and all ports, valves, mixing
valves, and piping shall be 1-\1/2\'' or larger, reduced down to the
port size of the equipment by fittings at the connection ports of
the mixing chamber. The filling storage cylinder used during testing
shall be a nominal 1000-pound water capacity DOT 4Bx cylinder with
liquid and vapor ports, valves and piping sized \3/4\'' NPT and
reduced or increased to the port size of the equipment by fittings
at the connection ports of the filling storage cylinder.
    6.4 System Dependent Equipment Test Apparatus. This test
apparatus is to be used for final recovery vacuum rating of all
system dependent equipment.
    6.4.1 Test Setup. The test apparatus shown in Figure 2 consists
of a complete refrigeration system. The manufacturer shall identify
the refrigerants to be tested. The test apparatus can be modified to
facilitate operation or testing of the system dependent equipment if
the modifications to the apparatus are specifically described within
the manufacturer's literature. A 6.3 mm

balance line shall be connected across the test apparatus between
the high- and low-pressure sides, with an isolation valve located at
the connection to the compressor high side. A 6.3 mm access port
with a valve core shall be located in the balance line for the
purpose of measuring final recovery vacuum at the conclusion of the
test.
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Section 7. Performance Testing Procedures

    7.1 General Testing.
    7.1.1 Temperatures. Testing shall be conducted at an ambient
temperature of 24 [deg]C  1 [deg]C except high
temperature vapor recovery shall be at 40 [deg]C  1
[deg]C. The evaporator conditions of Section 6.2.3 shall be
maintained as long as liquid refrigerant remains in the mixing
chamber.
    7.1.2 Refrigerants. The equipment shall be tested for all
designated refrigerants (see Section 11.2). All tests in Section 7
shall be completed for each refrigerant before starting tests with
the next refrigerant.
    7.1.3 Selected Tests. Tests shall be as appropriate for the
equipment type and ratings parameters selected (see Sections 9.9,
11.1 and 11.2).
    7.1.4 Hose Assemblies. For the purpose of limiting refrigerant
emissions to the atmosphere, hose assemblies shall be tested for
permeation according to ANSI/UL Standard 1963.
    7.2 Equipment Preparation and Operation. The equipment shall be
prepared and operated per the operating instructions.
    7.3 Test Batch. The test batch consisting of refrigerant sample
(see Section 5) of the test refrigerant shall be prepared and
thoroughly mixed. Continued mixing or stirring shall be required
during the test while liquid refrigerant remains in the mixing
chamber. The mixing chamber shall be filled to 80% level by volume.
    7.3.1 Control Test Batch. Prior to starting the test for the
first batch for each refrigerant,

a liquid sample will be drawn from the mixing chamber and analyzed
per Section 8 to assure that contaminant levels match Table 1 within
10 ppm for moisture, 20 ppm for oleic acid
and 0.5% for oil.
    7.4 Recovery Tests (Recovery and Recovery/Recycling Equipment)
    7.4.1 Determining Recovery Rates. The liquid and vapor
refrigerant recovery rates shall be measured during the first test
batch for each refrigerant (see Sections 9.1, 9.2 and 9.4).
Equipment preparation and recovery cylinder changeover shall not be
included in elapsed time measurements for determining vapor recovery
rate and liquid refrigerant recovery rate. Operations such as
subcooling the recovery cylinder shall be included. The recovery
cylinder shall be the same size as per Section 6.3 or as furnished
by the equipment manufacturer. Oversized tanks shall not be
permitted.
    <IP_ADDRESS> Liquid Refrigerant Recovery Rate. If elected, the
recovery rate using the liquid refrigerant feed means (see Section
6.2.5) shall be determined. After the equipment reaches stabilized
conditions of condensing temperature and/or recovery cylinder
pressure, the recovery process shall be stopped and an initial
weight shall be taken of the mixing chamber (see Section 9.2). The
recovery process shall be continued for a period of time sufficient
to achieve the accuracy in Section 9.4. The recovery process shall
be stopped and a final weight of the mixing chamber shall be taken.
    <IP_ADDRESS> Vapor Refrigerant Recovery Rate. If elected, the average
vapor flow rate shall be measured to accuracy requirements in
Section 9.4 under conditions with no liquid refrigerant in the
mixing chamber. The liquid recovery feed means shall be used. At
initial conditions of saturated vapor at the higher of 24 [deg]C or
the boiling temperature (100 kPa), the weight of the mixing chamber
and the pressure shall be recorded. At final conditions representing
pressure in the mixing chamber of 10% of the initial condition, but
not less than the final recovery vacuum (see Section 9.6) nor more
than 100 kPa, measure the weight of the mixing chamber and the
elapsed time. At initial conditions, the recovery cylinder shall be
at saturation pressure at ambient conditions.
    <IP_ADDRESS> High Temperature Vapor Recovery Rate. This is applicable
for equipment having at least one designated refrigerant (see
Section 11.2) with a boiling point between -50 [deg]C and +10
[deg]C. Measure the rate for R-22, or the refrigerant with the
lowest boiling point if R-22 is not a designated refrigerant. Repeat
the test in Section <IP_ADDRESS> at saturated conditions at 40 [deg]C and
continue to operate equipment to assure it will operate at this
condition (see Section 7.4.3). At initial conditions, the recovery
cylinder shall be at saturated pressure at 40 [deg]C.
    <IP_ADDRESS> Push/Pull Liquid Refrigerant Recovery Rate. If elected,
the average liquid push/pull flow rate shall be measured to accuracy
requirements in Section 9.4. The mixing chamber and filling storage
cylinder shall be filled with refrigerant vapor at initial
conditions of saturated vapor at the higher of 24 [deg]C or the
boiling temperature at 100 kPa. An amount of liquid refrigerant
shall be added to the mixing chamber equivalent to 80% by weight of
the capacity of the filling storage cylinder. The pressure between
the mixing chamber and filling storage cylinder shall be equalized
and stabilized at initial conditions of saturated vapor at the
higher of 24 [deg]C or the boiling temperature at 100 kPa. The
initial weight of the mixing chamber and the pressure shall be
recorded. The equipment is then operated in push/pull recovery mode
and the weight change of the mixing chamber is recorded over time
until all of the liquid has been transferred.
    7.4.2 Recovery Operation. This test is for determining the final
recovery vacuum and the ability to remove contaminants as
appropriate. If equipment is rated for liquid recovery (see Section
<IP_ADDRESS>), liquid recovery feed means described in Section 6.2.5
shall be used. If not, vapor recovery means described in Sections
6.2.3 or 6.2.4 shall be used. Continue recovery operation until all
liquid is removed from the test apparatus and vapor is removed to
the point where equipment shuts down by automatic means or is
manually shut off per operating instructions.
    <IP_ADDRESS> Oil Draining. Capture oil from the equipment at
intervals as required in the instructions. Record the weight of the
container. Completely remove refrigerant from oil by evacuation or
other appropriate means. The weight difference shall be used in
Section 7.5.2.
    7.4.3 Final Recovery Vacuum. At the end of the first test batch
for each refrigerant, the liquid valve and vapor valve of the
apparatus shall be closed. After waiting 1 minute, the mixing
chamber pressure shall be recorded (see Section 9.6).
    7.4.4 Residual Refrigerant. This test will measure the mass of
remaining refrigerant in the equipment after clearing and therefore
the extent of mixing different refrigerants (see Section 9.6).
    <IP_ADDRESS> Initial Conditions. At the end of the last test for each
batch for each refrigerant, the equipment shall be disconnected from
the test apparatus (Figure 1). Recycle per Section 7.5, if
appropriate. Perform refrigerant clearing operations as called for
in the instruction manual. Capture and record the weight of any
refrigerant which would have been emitted to the atmosphere during
the clearing process for use in Section 9.5. If two loops are used
for recycling, trapped refrigerant shall be measured for both.
    <IP_ADDRESS> Residual Trapped Refrigerant. Evacuate an empty test
cylinder to 1.0 kPa. Record the empty weight of the test cylinder.
Open all valves to the equipment so as to provide access to all
trapped refrigerant. Connect the equipment to the test cylinder and
operate valves to recover the residual refrigerant. Record the
weight of the test cylinder using a recovery cylinder pressure no
less than specified in Section 6.2.2. Place the test cylinder in
liquid nitrogen for a period of 30 minutes or until a vacuum of 1000
microns is reached, whichever occurs first.
    7.5 Recycling Tests (Recovery/Recycling Equipment).
    7.5.1 Recycling Operation. As each recovery cylinder is filled
in Section 7.4.2, recycle according to operating instructions. There
will not necessarily be a separate recycling sequence. Note non-
condensable purge measurement in Section 9.5.
    <IP_ADDRESS> Recycle Flow Rate. While recycling the first recovery
cylinder for each refrigerant, determine the recycling flow rate by
appropriate means (see Section 9.3) to achieve the accuracy required
in Section 9.4.
    7.5.2 Non-Condensable Sample. After completing Section 7.4.3,
prepare a second test batch (see Section 7.3). Recover per Section
7.4.2 until the current recovery cylinder is filled to 80% level by
volume. Recycle per Section 7.5.1. Mark this cylinder and set aside
for taking the vapor sample. For equipment having both an internal
tank of at least 3 kg refrigerant capacity and an external recovery
cylinder, two recovery cylinders shall be marked and set aside. The
first is the cylinder described above. The second cylinder is the
final recovery cylinder after filling it to 80% level by volume and
recycling.
    <IP_ADDRESS> Push/Pull Liquid Refrigerant Recovery Rate. This rate
shall be measured by weight change of the mixing chamber divided by
elapsed time (see Section <IP_ADDRESS>). The units shall be kg/min and
the accuracy shall be per Section 9.4.
    7.5.3 Liquid Sample for Analysis. Repeat steps in Sections 7.3,
7.4.2 and 7.5.1 with further test batches until indication means in
Section 4.2 show the filter/drier(s) need replacing.
    <IP_ADDRESS> Multiple Pass. For equipment with a separate recycling
circuit (multiple pass), set aside the current cylinder and draw the
liquid sample (see Section 7.4) from the previous cylinder.
    <IP_ADDRESS> Single Pass. For equipment with the single pass
recycling circuit, draw the liquid sample (see Section 7.4) from the
current cylinder.
    7.6 Measuring Refrigerant Loss. Refrigerant loss due to non-
condensables shall be determined by appropriate means (see Section
9.5.1). The loss could occur in Sections 7.4.1, 7.4.2 and 7.5.1.

Section 8. Sampling and Chemical Analysis Methods

    8.1 Chemical Analysis. Chemical analysis methods shall be
specified in appropriate standards such as AHRI Standard 700,
Appendix C to AHRI Standard 700, and Addendum 700-1 to Appendix C.
If alternate test methods are employed, the laboratory must be able
to demonstrate that they produce results equivalent to the specified
referee method.
    8.2 Refrigerant Sampling.
    8.2.1 Moisture Content. The water content in refrigerant shall
be measured by the Karl Fischer Coulometric Titration technique.
Report the moisture level in parts per million by weight.
    8.2.2 Chloride Ions. Chloride ions shall be measured by
turbidity tests. At this time, quantitative results have not been
defined. Report chloride content as ``pass'' or ``fail.'' In the
future, when quantitative results are possible, report chloride
content as parts per million by weight.
    8.2.3 Acid Content. The acidity test uses the titration
principle. Report the acidity in

parts per million by weight (mg KOH/kg) of sample.
    8.2.4 High Boiling Residue. High boiling residues shall use
measurement of the volume of residue after evaporating a standard
volume of refrigerant. Using weight measurement and converting to
volumetric units is acceptable. Report high boiling residues as
percent by volume.
    8.2.5 Particulates/Solids. The particulates/solids measurement
employs visual examination. Report results as ``pass'' or ``fail.''
    8.2.6 Non-condensables. The level of contamination by non-
condensable gases in the base refrigerant being recycled shall be
determined by gas chromatography. Report results as percent by
volume.

Section 9. Performance Calculations for Ratings

    9.1 Vapor Refrigerant Recovery Rate. This rate shall be measured
by weight change of the mixing chamber divided by elapsed time (see
<IP_ADDRESS>). The units shall be kg/min and the accuracy shall be per
Section 9.4.
    9.1.1 High Temperature Vapor Recovery Rate. This rate shall be
measured by measured weight change of the mixing chamber divided by
elapsed time (see Section <IP_ADDRESS>). The units shall be kg/min and
the accuracy shall be per Section 9.4.
    9.2 Liquid Refrigerant Recovery Rate. This rate shall be
measured by weight change of the mixing chamber divided by elapsed
time (see <IP_ADDRESS>). The units shall be kg/min and the accuracy shall
be per Section 9.4.
    9.3 Recycle Flow Rate. The recycle flow rate shall be as defined
in Section 3.12, expressed in kg/min, and the accuracy shall be per
Section 9.4.
    9.3.1 For equipment using multi-pass recycling or a separate
sequence, the recycle rate shall be determined by dividing the net
weight, W, of the refrigerant to be recycled by the actual time T
required to recycle. Any set-up or operator interruptions shall not
be included in the time T.
    9.3.2 If no separate recycling sequence is used, the recycle
rate shall be the higher of the vapor refrigerant recovery rate or
the liquid refrigerant recovery rate. The recycle rate shall match a
process which leads to contaminant levels in Section 9.9.
Specifically, a recovery rate determined from bypassing a
contaminant removal device cannot be used as a recycle rate when the
contaminant levels in Section 9.9 are determined by passing the
refrigerant through the contaminant removal device.
    9.4 Accuracy of Flow Rates. The accuracy of test measurements in
Sections 9.1, 9.2 and 9.3 shall be 008 kg/min for flow
rates up to 0.42 kg/min and 2.0% for flow rates larger
than 0.42 kg/min. Ratings shall be expressed to the nearest 0.02 kg/
min.
    9.5 Refrigerant Loss. This calculation will be based upon the
net loss of refrigerant which would have been eliminated in the non-
condensable purge process (see Section 7.5.1), the oil draining
process (see Section <IP_ADDRESS>) and the refrigerant clearing process
(see Section <IP_ADDRESS>), all divided by the net refrigerant content of
the test batches. The refrigerant loss shall not exceed 3% by
weight.
    9.5.1 Non-Condensable Purge. Evacuate an empty container to 2
kPa. Record the empty weight of the container. Place the container
in a dry ice bath. Connect the equipment purge connection to the
container and operate purge according to operating instructions so
as to capture the non-condensables and lost refrigerant. Weigh the
cylinder after the recycling is complete. Equivalent means are
permissible.
    For units which either recycle or list non-condensable removal,
non-condensable gases are purged, operating the recycle device per
the manufacturer's instructions through an evaporator pressure
regulator (EPR) valve into a liquid nitrogen-chilled cylinder. This
combination will simulate the atmosphere while allowing the capture
of purge gases. The cylinder is weighed before and after the purge
procedure.
    9.5.2 Oil Draining. Refrigerant removed from the oil after
draining shall be collected and measured in accordance with Section
<IP_ADDRESS>.
    9.5.3 Clearing Unit. Refrigerant captured during the clearing
process shall be measured in accordance with Section <IP_ADDRESS>.
    9.6 Final Recovery Vacuum. The final recovery vacuum shall be
the mixing chamber pressure in Section 7.4.3 expressed in kPa at 24
[deg]C. The accuracy of the measurement shall be within 0.33 kPa.
    9.7 Residual Trapped Refrigerant. The amount of residual trapped
refrigerant shall be the final weight minus the initial weight of
the test cylinder in Section <IP_ADDRESS>, expressed in kg. The accuracy
shall be 0.02 kg and reported to the nearest 0.05 kg.
    9.8 Refrigerant Processed. The amount of refrigerant processed
before changing filters (see Section 7.5.3) shall be expressed in kg
to an accuracy of 1%.
    9.9 Contaminant Levels. The contaminant levels remaining after
testing shall be published as follows:

Moisture content, ppm by weight
Chloride ions, pass/fail
Acid Content, ppm by weight
High boiling residue, % (by volume)
Particulates/solids, pass/fail (visual examination)
Non-condensables, % (by volume)

    9.10 Minimum Data Requirements for Published Ratings. Published
ratings shall include all of the parameters as shown in Tables 2 and
3 for each refrigerant designated by the manufacturer.

Section 10. Tolerances

    10.1 Tolerances. Performance related parameters shall be equal
to or better than the published ratings.

Section 11. Marking and Nameplate Data

    11.1 Marking and Nameplate Data. The nameplate shall display the
manufacturer's name, model designation, type of equipment (Recovery
or Recovery/Recycling and Self-Contained or System Dependent),
designated refrigerant(s), capacities, and electrical
characteristics where applicable. The nameplate shall also conform
to the labeling requirements established for certified recycling and
recovery equipment established at 40 CFR 82.158(h).
    Recommended nameplate voltages for 60 Hertz systems shall
include one or more of the equipment nameplate voltages shown in
Table 1 of ANSI/AHRI Standard 110. Recommended nameplate voltages
for 50 Hertz systems shall include one or more of the utilization
voltages shown in Table 1 of IEC Standard Publication 60038, IEC
Standard Voltages.
    11.2 Data for Designated Refrigerants. For each refrigerant
designated, the manufacturer shall include all the following that
are applicable per Table 2:

a. Liquid Recovery Rate, kg/min

b. Vapor Recovery Rate, kg/min
c. High Temperature Vapor Recovery Rate, kg/min
d. Push/Pull Liquid Recovery Rate, kg/min
e. Final Recovery Vacuum Level, kPa
f. Recycle Flow Rate, kg/min
g. Refrigerant Loss, kg
h. Residual Trapped Refrigerant, kg
i. Quantity of Refrigerant Processed at Rated Conditions, kg

           Table 2--Performance Ratings for Refrigerant Recovery and Recovery/Recycling Equipment 4,5
----------------------------------------------------------------------------------------------------------------
                                                                       Type of equipment
                                             -------------------------------------------------------------------
                  Parameter                                                                           System
                                                  Recovery        Recovery/        Recycling        dependent
                                                                  recycling                         equipment
----------------------------------------------------------------------------------------------------------------
Liquid Refrigerant Recovery Rate, kg/min....           X \1\            X \1\              N/A              N/A
Vapor Refrigerant Recovery Rate, kg/min.....           X \1\            X \1\              N/A              N/A
High Temperature Vapor Recovery Rate, kg/min           X \1\            X \1\              N/A              N/A
Push/Pull Liquid Recovery Rate, kg/min......           X \1\            X \1\              N/A              N/A
Final Recovery Vacuum Level, kPa............               X                X              N/A                X
Recycle Flow Rate, kg/min...................             N/A                X                X              N/A
Refrigerant Loss, kg........................           X \2\                X                X            X \3\
Residual Trapped Refrigerant, kg............           X \3\            X \2\            X \2\            X \2\

Quantity of Refrigerant Processed at Rated               N/A                X                X              N/A
 Conditions, kg.............................
----------------------------------------------------------------------------------------------------------------
\1\ For a recovery or recovery/recycle unit, one must rate either liquid refrigerant recovery rate or vapor
  refrigerant recovery rate or one can rate for both. If rating only one, the other shall be indicated by N/A,
  ``not applicable.''
\2\ Mandatory rating if multiple refrigerants, oil separation or non-condensable purge are rated.
\3\ Mandatory rating for equipment tested for multiple refrigerants.
\4\ ``X'' denotes mandatory rating or equipment requirements.
\5\ ``N/A'' indicates ``Not Applicable'' for a parameter that does not have a rating.

       Table 3--Contaminant Removal Ratings for Refrigerant Recovery and Recovery/Recycling Equipment 1,2
----------------------------------------------------------------------------------------------------------------
                                                                       Type of equipment
                                             -------------------------------------------------------------------
                 Contaminant                                                                          System
                                                  Recovery        Recovery/        Recycling        dependent
                                                                  recycling                         equipment
----------------------------------------------------------------------------------------------------------------
Moisture Content, ppm by weight.............             N/A                X                X              N/A
Chloride Ions, pass/fail....................             N/A                X                X              N/A
Acid Content, ppm by weight.................             N/A                X                X              N/A
High Boiling Residue, % by volume...........             N/A                X                X              N/A
Particulates/solids, pass/fail..............             N/A                X                X              N/A
Non-Condensables, % by volume...............             N/A                X                X              N/A
----------------------------------------------------------------------------------------------------------------
\1\ ``X'' denotes mandatory rating.
\2\ ``N/A'' indicates ``Not Applicable.''

Attachment 1 to Appendix B3 to Subpart F of Part 82--References

    Listed here are all standards, handbooks, and other publications
essential to the formation and implementation of the standard. All
references in this appendix are considered as part of this standard.

 ANSI/UL Standard 1963, Refrigerant Recovery/Recycling
Equipment, First Edition, 2011, American National Standards
Institute/Underwriters Laboratories, Inc.
 ANSI/AHRI Standard 110-2012, Air-Conditioning, Heating and
Refrigerating Equipment Nameplate Voltages, 2012, Air-Conditioning,
Heating, and Refrigeration Institute
 AHRI Standard 700-2015, Specifications for Refrigerants,
Air-Conditioning, Heating, and Refrigeration Institute
 ASHRAE Terminology, https://www.ashrae.org/resources--publications/free-resources/ashrae-terminology, 2014, American
Society of Heating, Refrigerating, and Air-Conditioning Engineers,
Inc.
 International Standard IEC 60038, IEC Standard Voltages,
2009, International Electrotechnical Commission

Attachment 2 to Appendix B3 to Subpart F of Part 82--Particulate Used
in Standard Contaminated Refrigerant Sample

1. Particulate Specification

    B1.1 The particulate material (pm) will be a blend of 50% coarse
air cleaner dust as received, and 50% retained on a 200-mesh screen.
The coarse air cleaner dust is available from: AC Spark Plug
Division; General Motors Corporation; Flint, Michigan.
    B1.2 Preparation of Particulate Materials. To prepare the blend
of contaminant per ASHRAE Standard 63.2, first wet screen a quantity
of coarse air cleaner dust on a 200-mesh screen (particle retention
74 [mu]m). This is done by placing a portion of the dust on a 200-
mesh screen and running water through the screen while stirring the
dust with the fingers. The fine contaminant particles passing
through the screen are discarded. The larger than 200-mesh particles
collected on the screen are removed and dried for one hour at 110
[deg]C. The blend of standard contaminant is prepared by mixing 50%
by weight of coarse air cleaner dust as received (after drying for
one hour at 110 [deg]C) with 50% by weight of the larger than 200-
mesh screened dust.
    B1.3 Particle Size Analysis. The coarse air cleaner dust as
received and the blend used as the standard contaminant have the
following approximate particle size analysis:

  Table B1--Weight Percentage in Various [mu]m Size Ranges for Particle
                              Size Analysis
------------------------------------------------------------------------
                                                        As
                Size range ([mu]m)                   received  Blend (wt
                                                      (wt %)       %)
------------------------------------------------------------------------
0-5...............................................         12          6
5-10..............................................         12          6
10-20.............................................         14          7
20-40.............................................         23         11
40-80.............................................         30         32
80-200............................................          9         38
------------------------------------------------------------------------

0
16. Amend subpart F by adding appendix B4 to read as follows:

Appendix B4 to Subpart F of Part 82--Performance and Safety of
Flammable Refrigerant Recovery and/or Recycling Equipment

    This appendix is based on the Air-Conditioning, Heating, and
Refrigeration Institute Standard 740-2015, Performance Rating of
Refrigerant Recovery Equipment and Recovery/Recycling Equipment, and
Underwriters Laboratories Standard 1963 (Fourth Edition), Standard
for Safety: Refrigerant Recovery/Recycling Equipment, including
Supplement SB (added October 11, 2013), Requirements for Refrigerant
Recovery/Recycling Equipment Intended for Use with a Flammable
Refrigerant.

Section 1. Purpose

    1.1 Purpose. The purpose of this standard is to establish
methods of testing for rating and evaluating the performance and
safety of refrigerant recovery and/or recycling equipment and
general equipment requirements (herein referred to as ``equipment'')
for contaminant or purity levels, capacity, speed and purge loss to
minimize emission into the atmosphere of designated refrigerants, as
well as safety for use with flammable refrigerants.

Section 2. Scope

    2.1 Scope. This standard applies to equipment for recovering
and/or recycling flammable single refrigerants, azeotropes,
zeotropic blends, and their normal contaminants from refrigerant
systems. This standard defines the test apparatus, test gas
mixtures, sampling procedures, analytical techniques, and equipment
construction that will be used to determine the performance

and safety of refrigerant recovery and/or recycling equipment
(hereinafter, ``equipment'').

Section 3. Definitions

    3.1 Definitions. All terms in this appendix will follow the
definitions in Sec.  82.152 and Appendix B3 to Subpart F of Part 82
unless otherwise defined in this appendix.
    3.2 All definitions used in Underwriters Laboratories Standard
1963 (Fourth Edition), Standard for Safety: Refrigerant Recovery/
Recycling Equipment as applicable, are incorporated by reference.
    3.3 All definitions used in Supplement SB (added October 11,
2013), Requirements for Refrigerant Recovery/Recycling Equipment
Intended for Use with a Flammable Refrigerant in Underwriters
Laboratories Standard 1963 (Fourth Edition), Standard for Safety:
Refrigerant Recovery/Recycling Equipment, are incorporated by
reference.

Section 4. Evaluation of Performance

    4.1 Performance Ratings. All recovery and/or recycling equipment
to be tested under this appendix must follow the procedures and meet
all requirements established in Appendix B3 to Subpart F of Part 82
to determine the performance ratings in addition to the safety
evaluation conducted under the rest of this appendix.
    4.2 Safety. All recovery and/or recycling equipment to be tested
under this appendix must follow the procedures and meet all
requirements in Supplement SB (added October 11, 2013), Requirements
for Refrigerant Recovery/Recycling Equipment Intended for Use with a
Flammable Refrigerant in Underwriters Laboratories Standard 1963
(Fourth Edition), Standard for Safety: Refrigerant Recovery/
Recycling Equipment.
0
17. Amend subpart F by revising appendix D to read as follows:

Appendix D to Subpart F of Part 82--Standards for Becoming a Certifying
Program for Technicians

a. Test Preparation

    Technicians must pass an EPA-approved test, provided by an EPA-
approved certifying program to be certified as a Type I technician.
Organizations providing Type I certification only may choose either
an on-site format or a mail-in format similar to what is permitted
under the MVACs program.
    Technicians must pass a closed-book, proctored test,
administered in a secure environment, by an EPA-approved certifying
program to be certified as a Type II or Type III technician.
    Technicians must pass a closed-book, proctored test (or series
of tests), administered in a secure environment, by an EPA-approved
certifying program to be certified as a Universal technician. Mail-
in format Type I tests cannot be used toward a Universal
certification.
    Each certifying program must assemble tests by choosing a
prescribed subset from the EPA test bank. EPA will have a test bank
with more questions than are needed for an individual test, which
will enable the certifying program to generate multiple tests in
order to discourage cheating. Each test must include 25 questions
drawn from Group 1 and 25 questions drawn from each relevant
technical Group. Tests for Universal technicians will include 100
questions (25 from Group 1 and 25 from each relevant technical
Group). Universal tests may be taken all at once, or by combining
passing scores on separate Type I, Type II, and Type III tests.
Questions should be divided in order to sufficiently cover each
topic within the Group.
    Certifying programs must provide a paper hand-out or electronic
form of communication to technicians after they have completed their
certification test that contains the following information:

--Which certifying program is providing the testing;
--contact information for the certifying program;
--the name and contact information of the proctor; and
--when they should expect to receive their score and, if they
passed, their certification card.

    Each certifying program must show a method of randomly choosing
which questions will be on the tests. Multiple versions of the test
must be used during each testing event. Test answer sheets must
include the name and address of the applicant, the name and address
of the certifying program, and the date and location at which the
test was administered.
    Training material accompanying mail-in Type I tests must not
include sample test questions mimicking the language of the
certification test. All mail-in material will be subject to review
by EPA.
    Certifying programs may charge individuals reasonable fees for
the administration of the tests. EPA will publish a list of all
approved certifying programs.

b. Proctoring

    A certifying program for Type I (if in-person), Type II, Type
III, and Universal technicians must designate at least one proctor
registered for every 50 people taking tests at the same time at a
given site.
    The certification test for Type I (if taken as part of a
Universal certification), Type II, Type III, and Universal
technicians is a closed-book exam. The proctors must ensure that the
applicants for certification do not use any notes or training
materials during testing. Desks or work space must be placed in a
way that discourages cheating. The space and physical facilities are
to be conducive to continuous surveillance by the proctors and
monitors during testing.
    The proctor may not receive any benefit from the outcome of the
testing other than a fee for proctoring. Proctors cannot know in
advance which questions are on the tests they are proctoring.
    Proctors are required to verify the identity of individuals
taking the test by examining photo identification. Acceptable forms
of identification include but are not limited to drivers' licenses,
government identification cards, passports, and military
identification.
    Certifying programs for Type I technicians using the mail-in
format, must take sufficient measures at the test site to ensure
that tests are completed honestly by each technician. Each test for
Type I certification must provide a means of verifying the
identification of the individual taking the test. Acceptable forms
of identification include but are not limited to drivers' licenses
and passports.

c. Test Security

    A certifying program must demonstrate the ability to ensure the
confidentiality and security of the test questions and answer keys
through strict accountability procedures. An organization interested
in developing a technician certification program will be required to
describe these test security procedures to EPA.
    After the completion of a test, proctors must collect all test
forms, answer sheets, scratch paper and notes. These items are to be
placed in a sealed envelope.

d. Test Content

    All Type I, Type II, Type III, and Universal certification tests
will include 25 questions from Group I. Group I will ask questions
in the following areas:

I. Environmental impact of CFCs, HCFCs, and substitute refrigerants
II. Laws and regulations
III. Changing industry outlook

    Type I, Type II and Type III certification tests will also
include 25 questions from Group II. Group II will ask questions
covering sector-specific issues in the following areas:

IV. Leak detection
V. Recovery Techniques
VI. Safety
VII. Shipping
VIII. Disposal

    Universal certification tests will include 75 questions from
Group II, with 25 from each of the three sector-specific areas. This
is in addition to the 25 questions from Group I.

e. Grading

    Tests must be graded objectively. Certifying programs must
inform the applicant of their test results no later than 30 days
from the date of the test. Type I certifying programs using the
mail-in format must notify the applicants of their test results no
later than 30 days from the date the certifying programs received
the completed test and any required documentation.
    The passing score for the closed-book Type I, Type II, Type III
and Universal certification test is 70 percent. The passing score
for Type I certification tests using the mail-in format is 84
percent.

f. Proof of Certification

    Certifying programs must issue a standard wallet-sized
identification card no later than 30 days from the date of the test.
Type I certifying programs using mail-in formats must issue cards to
certified technicians no later than 30 days from the date the
certifying program receives the completed test and any required
documentation.
    Each wallet-sized identification card must include, at a
minimum, the name of the certifying program including the date the
certifying program received EPA approval, the name of the person
certified, the type of

certification, a unique number for the certified person that does
not include a technician's social security number, and the following
text:
    [Name of person] has successfully passed a [Type I, Type II,
Type III and/or Universal--as appropriate] exam on how to
responsibly handle refrigerants as required by EPA's National
Recycling and Emissions Reduction Program.

g. Recordkeeping and Reporting Requirements

    Certifying programs must maintain records of the names and
addresses of all individuals taking the tests, the scores of all
certification tests administered, and the dates and locations of all
tests administered. These records must be maintained indefinitely,
unless transferred to another certifying program or EPA.
    EPA must receive an activity report from all approved certifying
programs by every January 30 and July 30, which covers the previous
six months of certifications. The first report must be submitted
following the first full six-month period for which the program has
been approved by EPA. This report includes the pass/fail rate and
testing schedules. If the certifying program believes a test bank
question needs to be modified, information about that question
should also be included.
    Approved certifying programs will receive a letter of approval
from EPA. Each testing center must display a copy of that letter at
their place of business.
    Approved technician certification programs that voluntarily plan
to stop providing the certification test must forward all records
required by this appendix and Sec.  82.161 to another program
currently approved by EPA in accordance with this appendix and with
Sec.  82.161. Approved technician certification programs that
receive records of certified technicians from a program that no
longer offers the certification test, and the program that is
voluntarily withdrawing from being a technician certification
program must inform EPA in writing at the address listed in Sec.
82.160 within 30 days of receiving or transferring these records.
The notification must include the name and address of the program to
which the records have been transferred. If another currently
approved program willing to accept the records cannot be located,
these records must be submitted to EPA at the address listed at
Sec.  82.160.
    Technician certification programs that have had their
certification revoked in accordance with Sec.  82.169 must forward
all records required by this appendix and Sec.  82.161 to EPA at the
address listed in Sec.  82.160. Failure to do so is a violation of
40 CFR part 82, subpart F.

h. Additional Requirements

    EPA may periodically inspect testing sites to ensure compliance
with EPA regulations. If testing center discrepancies are found,
they must be corrected within a specified time period. If
discrepancies are not corrected, EPA may suspend or revoke the
certifying program's approval.
    The inspections will include but are not limited to a review of
the certifying program's provisions for test security, the
availability of space and facilities to conduct the administrative
requirements and ensure the security of the tests, the availability
of adequate testing facilities and spacing of the applicants during
testing, a review of the proper procedures regarding accountability,
and that there is no evidence of misconduct on the part of the
certifying programs, their representatives and proctors, or the
applicants for certification.
    If the certifying programs offer training or provide review
materials to the applicants, these endeavors are to be considered
completely separate from the administration of the certification
test.

0
18. Amend subpart F by adding appendix E to read as follows:

Appendix E to Subpart F of Part 82--Test Procedure for Leaks From
Containers Holding Two Pounds or Less of Refrigerant for Use in an MVAC

    This appendix is based on the California Air Resources Board
(CARB) standard TP-503: Test Procedure for Leaks from Small Cans of
Automotive Refrigerant, as amended on January 5, 2010; and CARB
standard BP-A1: Balance Protocol for Gravimetric Determination of
Sample Weights using a Precision Balance, as amended January 5,
2010.

Section 1. Applicability

    This test procedure is used by manufacturers of containers
holding two pounds or less of refrigerant for use in a motor vehicle
air conditioner (MVAC) to determine the leakage rate of small
containers of automotive refrigerant that are subject to the
requirements of 40 CFR part 82, subpart F. Specifically, this test
procedure will specify the equipment, procedures, and calculations
to determine if a container holding two pounds or less of
refrigerant for use in an MVAC complies with the leakage rate
specified in Sec.  82.154(c)(2)(ii). All terms in this appendix will
follow the definitions in Sec.  82.152 unless otherwise defined in
this appendix.
    All containers holding two pounds or less of refrigerant for use
in an MVAC must comply with other applicable codes and regulations
such as local, state, or Federal safety codes and regulations.
    This test procedure involves the use of materials under pressure
and operations and should only be used by or under the supervision
of those familiar and experienced in the use of such materials and
operations. Appropriate safety precautions should be observed at all
times while performing this test procedure.

Section 2. Principle and Summary of Test Procedure

    This procedure is used to determine the leakage rate of
containers holding two pounds or less of refrigerant for use in an
MVAC (small cans). Testing will involve subjecting both full and
partially empty cans in both upright and inverted positions at two
temperatures: 73 [deg]F and 130 [deg]F.
    Thirty small cans are tested under each condition for a total of
240 small cans tested. Small cans are brought to temperature
stability, weighed, then stored for 30 days under specified
conditions of temperature, orientation, and state of fill, then re-
weighed. Leakage rate (grams/year) is estimated by (weight loss in
grams) x 365/(days duration). The leakage rate is then compared to a
standard of 3.00 grams/year to determine if a given small can
complies with the leakage rate specified in Sec.  82.154(c)(2)(ii).

Section 3. Biases and Interferences

    3.1 Contaminants on the operator's hands can affect the weight
of the small can and the ability of the small can to absorb
moisture. To avoid contamination of the small can, the balance
operator should wear gloves while handling the small cans.
    3.2 Weight determinations can be interfered with by moisture
condensing on the small can and by thermal currents generated by
temperature differences between the small can and the room
temperature. The small cans cool during discharge and could cause
condensation. For these reasons, small cans must be equilibrated to
balance room temperature for at least four hours before weighing.
    3.3 Variations in the temperature, pressure, and humidity of the
ambient air will cause variations in the buoyancy of the small can.
These variations should typically be less than 25 mg for a small
can. If the small can is not leaking at all, then the uncorrected
weight changes will be within the range of 0  25 mg,
which is about ten percent of the 247 mg loss expected after thirty
days for a can leaking at 3 g/yr. In that case buoyancy corrections
can be omitted. If the absolute value of the uncorrected weight
change exceeds 25 mg, then all calculations must be made using
weights corrected for buoyancy based on the temperature, pressure,
and humidity of the weighing room.
    3.4 Some electronic balances are sensitive to the effects of
small static charges. The small can should be placed directly on the
balance pan, ensuring metal to metal contact. If the balance pan is
not grounded, the small can and balance pan should be statically
discharged before weighing.

Section 4. Sensitivity and Range

    The mass of a full small can could range from roughly 50 g to
1000 g depending on the container capacity. A top loading balance,
capable of a maximum weight measurement of not less than 1,000 g and
having a minimum readability of 0.001 g, reproducibility and
linearity of  0.002 g, must be used to perform mass
measurements.

Section 5. Equipment

    5.1 A top loading balance that meets the requirements of Section
4 above.
    5.2 A NIST traceable working standard mass for balance
calibration. A NIST traceable working standard mass for a balance
linearity check. A reference mass to serve as a ``blank'' small can.
    5.3 An enclosure capable of controlling the internal air
temperature from 73 [deg]F  5 [deg]F, and an enclosure
capable of controlling the internal air temperature to 130 [deg]F
 5 [deg]F.
    5.4 A temperature instrument capable of measuring the internal
temperature of the

temperature conditioning enclosures and the balance room with a
sensitivity of  2 [deg]F.
    5.5 A barometric pressure instrument capable of measuring
atmospheric pressure at the location of the balance to within  0.02 inches of mercury.
    5.6 A relative humidity measuring instrument capable of
measuring the relative humidity (RH) at the location of the balance
with a sensitivity of  2% RH.
    5.7 A hose with appropriate fitting for dispensing refrigerant
from the small can to a recovery machine.
    5.8 A refrigerant recovery machine to collect the discharged
refrigerant from small cans being tested.

Section 6. Calibration Procedures

    6.1 Calibrations are applied to the balance and to the support
equipment such as temperature, humidity, and pressure monitoring
equipment. Procedures for calibration are not spelled out here.
General calibration principals for the support equipment and the
balance are described in Section 11, Quality Assurance/Quality
Control. Detailed calibration procedures for measurements made using
the balance are contained in Attachment A: ``Balance Protocol for
Gravimetric Determination of Sample Weights using a Precision
Balance.''

Section 7. Small Can Preparation

    7.1 Receive a batch of 240 small cans of one design to be
tested. These may include several SKUs from different manufacturers
if the container and valve combination are the same.
    7.2 Clean small cans with Alkanox solution or equivalent and dry
with a lint free towel.
    7.3 Confirm that the sample ID sticker on the small can matches
the sample ID on the chain of custody forms.
    7.4 Select a reference mass similar to the weight of a full
small can. If multiple sets of similar sized small cans are being
tested, only one reference mass is needed; it can be used with all
sets. Store the reference mass in the balance area.
    7.5 Evacuate the contents of one half of the small cans (120
cans) into the refrigerant recovery machine using normal DIY
dispensing procedures until each small can is approximately half
full.
    7.6 Select a reference mass similar to the weight of the half-
full small can. If multiple sets of similar size small cans are
being tested, only one reference mass is needed; it can be used with
all sets. Store the reference mass in the balance area.

Section 8. Small Can Weighing

    Weighing cans on the balance is done in accordance with
Attachment A to this appendix. Attachment A describes how to conduct
weight determinations including appropriate calibration and QC data.
This section, ``Small Can Weighing,'' describes the overall process,
not the details of how to use the balance.

Initial Weights

    8.1 Put on gloves. Check the small cans for contamination.
    8.2 Place the 240 small cans into a location where they can
equilibrate to balance room temperature. Record the small can test
IDs and the equilibration start time on the Small Can Test Data
Forms (Form XXXX-YY) available on EPA's Web site in sets of thirty,
one form for each of the eight test conditions.
    8.3 Let cans equilibrate for at least four hours.
    8.4 Weigh the set of 240 small cans and the reference weights
using Attachment A and log the results to the Balance Weighing Log
Form (Form XXXX-YY) available on EPA's Web site.
    8.5 Transfer data from the Balance Weighing Log Form to the
Small Can Test Data Form in sets of 30, one set for each of the
eight conditions to be tested.

Thirty-Day Soak

    8.6. Place each set of 30 small cans into the appropriate
orientation and temperature for soaking:
    30 full small cans--73 [deg]F, upright
    30 full small cans--73 [deg]F, inverted
    30 full small cans--130 [deg]F, upright
    30 full small cans--130 [deg]F, inverted
    30 half-full small cans--73 [deg]F, upright
    30 half-full small cans--73 [deg]F, inverted
    30 half-full small cans--130 [deg]F, upright
    30 half-full small cans--130 [deg]F, inverted
    8.7. Soak the small cans for 30 days undisturbed.

Final Weighing

    8.8 Place the 240 small cans into a location where they can
equilibrate to balance room temperature.
    8.9 Let the small cans equilibrate for at least four hours.
    8.10 Weigh the set of 240 small cans, the reference weights, and
any additional sets of small cans using Attachment A.
    8.11 Transfer data from the Balance Weighing Log Form to the
corresponding Small Can Test Data Forms.

Section 9. Calculations

Corrections for Buoyancy

    The calculations in this section are described in terms of
``weight.'' Mass is a property of the small can, whereas weight is a
force due to the effects of buoyancy and gravity. Procedures for
correcting the effect of buoyancy are given in Attachment B of this
appendix. Ignoring buoyancy, i.e. using weight data uncorrected for
buoyancy effects, is acceptable for a thirty day test if the
absolute magnitude of the weight change is less than 25 mg. If the
uncorrected weight change exceeds 25 mg for any small can, then
correct all small can weights for buoyancy using the procedures in
Attachment B before performing the calculations described below.

Calculation of Leak Rate

    The emission rate in grams/day for each small can is calculated
by subtracting the final weight from the initial weight and then
dividing the weight difference by the time difference measured in
days to the nearest hour (nearest 1/24 of a day). The emission rate
in g/day is multiplied by 365 to determine emission rate in grams/
yr. If the annual emission rate for any small can exceeds the entire
small can contents, then the annual emission rate for that small can
is adjusted to equal the entire small can contents/year (e.g., about
350 g/yr for a 12 ounce small can). The annual emission rate for the
purpose of the test is calculated by averaging the 240 individual
adjusted annual emission rates and rounding to two decimal places.
The cans fail the test if the adjusted annual emission rate averaged
over 240 cans is greater than 3.00 g/yr. The calculations are
described below.

Loss Rate for Each Small Can

Eidaily = (Wifinal - Wiinitial) /
(Difinal - Diinitial) g/day
Eiannual = 365 x Eidaily g/year
Eiadjusted = Minimum of (Eiadjusted, Ci/year)
g/yr

Where,

Ei = emission rate
Wifinal = weight of can i after soaking (grams)
Wiinitial = weight of can I before soaking (grams)
Difinal = date/time of final weight measurements (days)
Diinitial = date/time of initial weight measurements
(days)
Ci = original factory mass of refrigerant in can i

    Note: Date/Times are measured in days. Microsoft Excel stores
dates and times in days, and the calculations can be made directly
in Excel. If calculations are made manually, calculate serial days
to the nearest hour for each date and time as follows:
D = Julday + Hour/24

Where,

Julday = serial day of the year: Jan 1 = 1, Jan 31 = 31, Feb 1 = 32,
etc.
Hour = hour of day using 24-hour clock, 0 to 23

    Calculate the average loss rate for the 240 small cans as
follows:

Emean = [Sum (Eadjustedi), i=1 to 240] / 240

Section 10. Recordkeeping

    During small can weighing, record the small can weights and
date/times on the Balance Weighing Log Form. After each weighing
session, transfer the measured weights and date/times from the
Balance Weighing Log Form to the Small Can Test Data Form.
    At the end of the test, complete the calculations described in
Section 9, Calculations, and record the results on the Small Can
Test Data Form.

Section 11. Quality Assurance/Quality Control

    11.1 All temperature, pressure, and humidity instruments should
be calibrated annually against NIST traceable laboratory standards.
The main purpose of the NIST traceable calibration is to establish
the absolute accuracy of the device. The instruments should also be
checked periodically such as weekly, monthly, or quarterly against
intermediate standards or against independent instruments. For
example, a thermocouple can be checked weekly against a wall
thermometer. A barometer or pressure gauge can be checked weekly by
adjusting to sea level and comparing with local airport data. The
main purpose of the frequent checks is to verify that the device has
not failed in some way.

This is especially important for electronic devices such as a
digital thermometer, but even a liquid filled thermometer can
develop a problem such as a bubble.
    11.2 The balance should be serviced and calibrated annually by
an independent balance service company or agency using NIST
traceable reference masses. Servicing verifies accuracy and
linearity, and the maintenance performed helps ensure that a
malfunction does not develop.
    11.3 The balance must also be calibrated and its linearity
checked with working standards before and after each weighing
session, or before and after each group of 24 small cans if more
than 24 small cans are weighed in a session. Procedures for
calibrating and using the balance, as well as recording balance
data, are described in the accompanying balance weighing protocol.
These procedures include zero checks, calibration checks, and
reference mass checks. Procedures for calculating quality control
data from those checks are described in Attachment A.
    11.4 The small cans are cleaned then handled using gloves to
prevent contamination. All equilibration and soaking must be done in
a dust free area.

ATTACHMENT A--BALANCE PROTOCOL FOR GRAVIMETRIC DETERMINATION OF SAMPLE
WEIGHTS USING A PRECISION BALANCE

1. Scope and Application

    This Protocol summarizes a set of procedures and tolerances for
weighing objects in the range of 0 to 1,000 g with a resolution of
0.001 g. This protocol only addresses balance operations, it does
not address project requirements for equilibration, sample hold time
limits, sample collection etc.

2. Summary of Method

    The balance is zeroed and calibrated using procedures defined
herein. Object weight determinations are conducted along with
control object weight determinations, zero checks, calibration
checks, sensitivity checks, and replicate weightings in a defined
sequence designed to control and quantitatively characterize
precision and accuracy.

3. Definitions

    N/A.

4. Interferences

    Object weights can be affected by temperature and relative
humidity of their environment, air currents, static electricity,
gain and loss of water vapor, gain or loss of and loss of volatile
compounds directly from the sample or from contaminants such as
finger prints, marker ink, and adhesive tape.
    Contamination, transfer of material to or from the samples, is
controlled by conducting operations inside a clean area dedicated to
the purpose and having a filtered laminar air flow where possible;
by wearing gloves while handling all samples and related balance
equipment; by using forceps to handle small objects, and by keeping
the balance and all related equipment inside the clean area.
    Air currents are controlled by conducting weighing operations
inside a closed chamber or glove box and by allowing the substrates
to reach temperature and relative humidity equilibrium. The chamber
is maintained at 40% relative humidity and 25 [deg]C by a continuous
humidity and temperature control system. The temperature and RH
conditions are recorded at least once per weighing sessions.
Equilibration times for samples that are particularly sensitive to
humidity or to loss of semi-volatiles species are specified by
project requirements.
    Static electric charges on the walls of the balance and the
weighed objects, including samples, controls, and calibration
weights, can significantly affect balance readings. Static is
avoided by the operator ground himself and test objects as described
in the balance manual.

5. Personnel Health and Safety

    N/A.

6. Equipment and Supplies

     Filtered, temperature and humidity controlled weighing
chamber.
     Precision Balance.
     Plastic forceps.
     Nylon fabric gloves.
     Working calibration weights: ANSI Class 2, 1000g and
500 g.
     Working sensitivity weight: 50 mg.
     Reference objects: references are one or more objects
that are typical of the objects to be weighed during a project, but
that are stored permanently inside the balance glove box. Reference
objects are labeled Test1, Test2, Test3, etc.

7. Reagents and Standards

    N/A.

8. Sample Collection, Preservation, and Storage

    N/A. See relevant project requirements and SOPs.

9. Quality Control

    Data quality is controlled by specifying frequencies and
tolerances for Zero, Calibration, Linearity, and Sensitivity checks.
If checks do not meet tolerance criteria, then samples must be re-
weighed. In addition, the procedures specify frequencies for Control
Object Checks.
    Data quality is quantitatively characterized using Zero Check,
Calibration Check, and Control Check data. These data are summarized
monthly in statistics and QC charts.

10. Calibration and Standardization

    The absolute accuracy of the balance is established by
calibration against an ANSI Class 2, stainless steel working weight:
1000.000 g  0.0025 g. Linearity is established checking
the midpoint against an ANSI Class 2 stainless steel working weight:
500.000  0.0012 g. Sensitivity is established using and
ANSI Class 2 stainless steel or aluminum working weight: 50 mg.
Precision is checked by periodically checking zero, calibration, and
reference object weights.

11. Procedure

    11.1 Overview of Weighing Sequence
    Weighing a series of substrates consists of performing the
following procedures in sequence, while observing the procedures for
handling and the procedures for reading the balance:
    1. Initial Adjustment.
    2. Weigh eight samples.
    3. Zero Check.
    4. Weigh eight samples.
    5. Zero Check.
    6. Weigh eight samples.
    7. Calibration Check.
    8. Return to step 2.
    9. If less than 24 cans are weighed, perform a final Calibration
Check at the end of weighing.
    This sequence is interrupted and samples are reweighed if QC
check tolerances are not met. Each of these procedures along with
procedures for handling and reading the balance are described below.
The QC tolerances referred to in these procedures are listed in
Table 1.

11.2 Handling

    1. Never touch samples, weights, balance pans, etc. with bare
hands. Wear powder free gloves to handle the weights, controls, and
samples.

11.3 Reading the Balance

    1. Close the door. Wait for the balance stabilization light to
come on, and note the reading.
    2. Watch the balance reading for 30 sec (use a clock). If the
reading has not changed by more than 0.001 g from the reading noted
in step 1, then record the reading observed at the end of the 30 sec
period.
    3. If the reading has drifted more than 0.001 g note the new
balance reading and go to step 2.
    4. If the balance reading is flickering back and forth between
two consecutive values choose the value that is displayed more often
than the other.
    5. If the balance reading is flickering equally back and forth
between two consecutive values choose the higher value.

11.4 Initial Adjustment

    1. Empty the sample pan Close the door. Select Range 1000 g.
    2. Wait for a stable reading.
    3. Record the reading with QC code IZC (initial zero check).
    4. Press the Tare button.
    5. Record the reading in the logbook with QC code IZA (initial
zero adjust).
    6. Place the 1,000 g working calibration weight on the balance
pan.
    7. Wait for a stable reading.
    8. Record the reading with QC code ICC (initial cal check).
    9. Press the Calibrate button.
    10. Record the reading with QC code ICA (initial cal adjust).
    11. Remove the calibration weight.
    12. Wait for a stable reading.
    13. Record the reading with QC code IZC.
    14. If the zero reading exceeds  0.002 g, go to step
4.
    15. Place the 500 g calibration weight on the balance pan.
    16. After a stable reading, record the reading with QC code
C500. Do not adjust the balance.

    17. Add the 0.050 g weight to 500 g weight on the balance pan.
    18. After a stable reading, record the reading with QC code
C0.05. Do not adjust the balance.
    19. Weigh reference object TEST1, record reading with QC code
T1.
    20. Weigh the reference object TEST2, TEST3, etc. that is
similar in weight to the samples that you will be weighing. Record
with QC code T2, T3, etc.

11.5 Zero Check

1. Empty the sample pan. Close the door.
2. Wait for a stable reading
3. Record the reading with QC code ZC
4. If the ZC reading is less than or equal to the zero adjustment
tolerance shown in Table 1, return to weighing and do not adjust the
zero. If the ZC reading exceeded the zero adjustment tolerance,
proceed with steps 5 through 7.
5. Press the Tare button
6. Record the reading in the logbook with QC code ZA.
7. If the ZC reading exceeded the zero re-weigh tolerance, change
the QC code recorded in step 3 from ZC to FZC. Then enter a QC code
of FZ into the QC code column of all samples weights obtained after
the last valid zero check. Re-weigh all of those samples, recording
new data in new rows of the logbook.

11.6 Calibration Check

1. First, follow procedures for Zero Check. If the ZC was within
tolerance, tare the balance anyway (i.e. follow steps 5 and 6 of the
Zero Check method)
2. Place the 1,000 g working calibration weight on the sample pan,
wait for a stable reading.
3. Record the reading with QC code C1000
4. If the C1000 reading is less than or equal to the calibration
adjustment tolerances, skip steps 5 through 8 and proceed to step 9.
Do not adjust the calibration.
5. If the C100 reading exceeded the calibration adjust tolerance,
press the Calibrate button.
6. Record the reading in the logbook with QC code CA
7. Perform a Zero Check (follow the Zero Check method)
8. If the C1000 reading exceeded the calibration re-weigh tolerance,
change the code recorded in step 3 from C1000 to FC1000. Enter FC
into the QC column for all sample weights obtained after the last
valid calibration check. Re-weigh all of those samples, recording
new data in new rows of the logbook.

11.7 Replicate Weighing Check

1. This protocol does not include reweigh samples to obtain
replicates. The projects for which this protocol is intended already
include procedures multiple weightings of each sample.

       Table 1--QC Tolerances and Frequencies for Balance Protocol
------------------------------------------------------------------------

------------------------------------------------------------------------
Reading Tolerance:
------------------------------------------------------------------------
    0.001 g, stable for 30 sec.
------------------------------------------------------------------------
Adjustment Tolerances:
------------------------------------------------------------------------
    Zero:..............................  -0.003 to +0.003 g.
    Calibration:.......................  999.997 to 1000.003 g.
    Controls:..........................  none.
    Replicates:........................  none.
------------------------------------------------------------------------
Re-weigh Tolerances:
------------------------------------------------------------------------
    Zero:..............................  -0.005 to +0.005 g.
    Calibration:.......................  999.995 to 1000.005 g.
    Controls:..........................  none.
    Replicates:........................  none.
------------------------------------------------------------------------
Reference Objects:
------------------------------------------------------------------------
    Test 1--A reference object weighing about 400 g.
    Test 2--A reference object weighing about 200 g.
    Test 3--A reference object weighing about 700 g.
------------------------------------------------------------------------
QC Frequencies:
------------------------------------------------------------------------
    Zero Checks:.......................  once per 8 samples.
    Calibration Checks:................  once per 24 samples.
    Repeat weighings:..................  none (test method includes
                                          replicate determinations).
    Control objects:...................  once per weighing session.
------------------------------------------------------------------------

12. Data Analysis and Calculations

    For Zero Checks, let Z equal the recorded Zero Check value. For
control checks let T1, T2, etc. equal the recorded value for control
object Test 1, Test 2, etc. For Calibration Checks, let C1000 equal
C1000 reading minus 1000, M = C500-500, S = .C.050-C500-.050. For
Replicate Checks, let D equal the loss that occurred between the
first and second measurements. In summary:

T1 = T1
T2 = T2
T3 = T3
Z = ZC -0
C = C1000 -1000
M = C500 -500
G = C050 - C500 - .050

    Tabulate the mean and standard deviation for each of the
following: Z, C, M, G. T1, T2, T3. Depending on the number of
operators using the balance and the number of protocols in use,
analyze the data by subcategories to determine the effects of
balance operator and protocol. Each of these standard deviations,
SZ, SC, etc. is an estimate of the precision
of single weight measurement.
    For Z, C, M, and G, check the mean value for statistical
difference from 0. If the means are statistically different than
zero, troubleshooting to eliminate bias may be called for. For Z, C,
M, G, T1, T2, T3, check that the standard deviations are all
comparable. If there are systematic differences, then
troubleshooting to eliminate the problem may be called for.
    Note that the precision of a weight gain, involves two weight
determinations, and therefore is larger than S by a factor of
sqrt(2). On the other hand replicate weighings improves the
precision of the determinations by a factor of sqrt(N). If N = 2,
i.e. duplicates, then the factors cancel each other.
    To estimate the overall uncertainty in a weight determination, a
conservative estimate might be to combine the imprecision
contributed by the zero with the imprecision contributed by the
calibration.

U = Sqrt(SZ\2\ + SC\2\)

    The uncertainty in a weight gain from N replicates is then given
by:

Ugain = Sqrt(2) x Sqrt(SZ\2\ +
SC\2\) /Sqrt(N)

    But due to the balance adjustment and reweigh tolerances, we
expect SZ to approximately equal SC, to
approximately equal SM, etc. tolerances, so that the
equation above becomes:

Ugain = 2 x S/Sqrt(N)

    Where S is any individual standard deviation; or better, a
pooled standard deviation.

13. Method Performance

    The data necessary to characterize the accuracy and precision of
this method are still being collected. The method is used primarily
to weigh objects before and after a period of soaking to determine
weight loss by subtraction. Given the reweigh tolerances, we expect
that the precision of weight gain determinations will be on the
order of 0.006 g at the 1-sigma level. Bias in the weight gain
determination, due to inaccuracy of the calibration weight and to
fixed non-linearity of the balance response is on the order 0.005%
of the gain.

14. Pollution Prevention

    When discharging half the can contents during can preparation,
do not vent the contents of the small can to the atmosphere. Use an
automotive recovery machine to transfer small can contest to a
recovery cylinder.

15. Waste Management

    Dispose of the contents of the recycle cylinder through a
service that consolidates waste for shipment to EPA certified
facilities for reclaiming or destruction.

ATTACHMENT 2--COMPENSATION OF WEIGHT DATA FOR BUOYANCY AND GRAVITY
EFFECTS

Gravity

    Variations in gravity are important only when weighing objects
under different gravitational fields, i.e. at different locations or
at different heights. Since the balance procedures calibrate the
balance against a known mass (the calibration ``weight'') at the
same location where sample objects are weighed, there is no need to
correct for location. Although both the sample and the calibration
weight are used at the same location, there will be a difference in
the height of the center of gravity of the sample object (small can)
and the center of gravity of the reference mass (calibration
weight). However, this difference in height is maintained during
both the initial weights and final weights, affecting the initial
and final weights by the same amount, and affecting the scale of the
weight difference by only a few ppm. In any event, the magnitude of
this correction is on the order of 0.3 ug per kg per mm of height
difference. A difference on the order of 100 mm would thus yield a
weight difference of about 0.03 mg, which is insignificant compared
to our balance resolution which is 0.001 g or 1 mg.
    Based on the discussion above, no corrections for gravity are
necessary when determining weight changes in small cans.

Buoyancy

    Within a weighing session, the difference in density between the
sample object and the calibration weight will cause the sample
object weight value to differ from its mass value due to buoyancy.
For a 1-liter object in air at 20 [deg]C and at 1 atm, the buoyant
force is about 1.2 g. The volume of a 1 kg object with a density of
8 g/cm\3\ (e.g. a calibration weight), is about 0.125 liters, and
the buoyancy force is about 0.15 g. Variations in air density will
affect both of these values in proportion. The net value being
affected by variations in air density is thus on the order of 1.2-
0.15 = 1.05 g. Air density can vary up or down by 2% or more due to
variations in barometric pressure, temperature, and humidity. The
buoyancy force will then vary up or down by 0.02 g, or 20 mg. This
is significant compared to the weight change expected after one week
for a can leaking at 3 grams per year, which is 57 mg.
    Based on the discussion above, buoyancy corrections must be
made.
    Variables measured or calculated:

Vcan = volume of can (cm\3\). Estimate to within 10% by
measuring the can dimensions or by water displacement. Error in the
can volume will cause an error in the absolute amount of the
buoyancy force, but will have only a small effect on the change in
buoyancy force from day to day.
Wcan = nominal weight of a can (g), used to calculate the
nominal density of the can.
[rho]can = nominal density of a small can (g/cm\3\). The
nominal values can be applied to corrections for all cans. It is not
necessary to calculate a more exact density for each can. Calculate
once for a full can and once for a half full can as follows:
[rho]can = WCAN/VCAN
T = Temperature in balance chamber (degrees Celsius).
RH = Relative humidity in balance chamber (expressed a number
between 0 and 100).
Pbaro = Barometric pressure in balance chamber
(millibar). Use actual pressure, NOT pressure adjusted to sea level.
[rho]air = density of air in the balance chamber (g/
cm\3\). Calculate using the following approximation:
[rho]air = 0.001*[0.348444*Pbaro - (RH /
100)x(0.252xT - 2.0582)] / (T + 273.15)
[rho]ref = the reference density of the calibration
weight (g/cm\3\). Should be 8.0 g/cm\3\.
Equation to correct for buoyancy: Wcorrected =
Wreading x (1 - [rho]air /
[rho]ref) / (1 - [rho]air /
[rho]can)
[FR Doc. 2015-26946 Filed 11-6-15; 8:45 am]
BILLING CODE 6560-50-P