Updated (Approved.)
Projects may exceed 500 µg/m³ in total VOCs (part 1c), so long as the following individual component VOCs do not exceed the limits listed in CDPH/EHLB/Standard Method V1.1, Table 4.1 (one half the Chronic Reference Exposure Levels (CREL) issued by Office of Environmental Health Hazard Assessment):

For Part 2a, add: "(measured at 1.2-1.8 m [4-6 ft] above the floor)" after "800 ppm" at the end of the sentence

In Part 3a, change "After substantial completion and prior to occupancy, the HVAC system undergoes testing and balancing" to "After substantial completion and prior to occupancy, the HVAC system has (within the last 5 years), or is scheduled to, undergo testing and balancing."

(Approved)
AS 1668.2 may be used in lieu of ASHRAE 62.1 for Feature 3, Part 1: Ventilation Design. Note that all projects that wish to comply with AS 1668.2 must assume a minimum density of 16 m² per person.

At the end of Part 1b, add "Quality Standards feature in the WELL Building Standard for at least 95% of all hours in the previous year."

Previously published as an AAP:
Field and Laboratory Emission Cell (FLEC) emissions testing is approved as an emissions testing methodology only for furniture and furnishings that are made up of a uniform material and have flat testing surfaces on which the FLEC emissions testing methodology may be applied. For example, flat surfaced cabinetry that is made up of a uniform material may be tested using this methodology. However, chairs that are made from a variety of materials that lack flat surfaces may not be tested using this methodology. The emissions test must be administered by a third party investigator with no affiliation with the project. The associated costs are the responsibility of the project team. Additional tests performed in accordance with ISO 16000 methodology must be performed for total aldehydes and 4-Phenylcyclohexane and must meet the thresholds specified in the WELL Building Standard.

Add: "b. For furnishings, California Department of Public Health (CDPH) Standard Method v1.1-2010."

(Approved)
GreenGuard Gold is accepted as an equivalent for F04, Part 5

Updated (Approved):
LEED v4 EQc Low-emitting materials credit is deemed equivalent for Part 1. Please note that the project must adhere to the "Additional VOC content requirements for wet-applied products" section (found in LEED v4). Additionally, all newly applied paints and coatings must be in compliance.
BREEAM UK NC/RFO 2014, INC. 2016 and IRFO 2015 Hea 02: Indoor air quality - Volatile organic compound (VOC) emission levels (products) credit is deemed equivalent for Part 1. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014, Table 20 in the UK RFO 2014, Table 17 and 18 in the INC 2016). Additionally, all newly applied paints and coatings must be in compliance.

LEED v4 EQc Low-emitting materials credit is deemed equivalent for Part 2. Please note that the project must adhere to the "Additional VOC content requirements for wet-applied products" section (found in LEED v4). Additionally, all newly applied adhesives and sealants must be in compliance.
BREEAM UK NC/RFO 2014, INC 2016 and IRFO 2015 Hea 02: Indoor air quality - Volatile organic compound (VOC) emission levels (products)credit is deemed equivalent for Part 2. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014, Table 20 in the UK RFO 2014, Table 17 and 18 in the INC 2016). Additionally, all newly applied adhesives and sealants must be in compliance.

LEED v4 EQc Low-emitting materials credit is deemed equivalent for Part 3. Please note that the project must adhere to the "General emissions evaluation" section (found in LEED v4). Additionally, all newly installed flooring must be in compliance.
BREEAM UK NC/RFO 2014, INC 2016 and IRFO 2015 Hea 02: Indoor air quality - Volatile organic compound (VOC) emission levels (products) credit is deemed equivalent for Part 3. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014, Table 20 in the UK RFO 2014, Table 17 and 18 in the INC 2016). Additionally, all newly installed flooring must be in compliance.

LEED v4 EQc Low-emitting materials credit is deemed equivalent for Part 4. Please note that the project must adhere to the "General emissions evaluation" section (found in LEED v4). Additionally, all newly installed insulation must be in compliance.

LEED v4 EQc Low-emitting material credit is deemed equivalent for Part 5. Please note that the project must adhere to the "Furniture evaluation" section (found in LEED v4). Additionally, 95% (by cost) of all newly purchased furniture and furnishing must be in compliance.

Note BREEAM equivalency is only applicable for Feature 4 Parts 1-3.

(Approve)
For Feature 4, Part 5, as an alternative to the formaldehyde emissions thresholds cited in ANSI/BIFMA e3-2011 7.6.2, projects may use certain approved thresholds. For systems furniture laminates: CDPH Standard Method v1.1-2010 limits (9 ug/m3) may be used. For furniture substrates: CARB Phase II limits (50 ppb for hardwood plywood with veneer core, 50 ppb for hardwood plywood with composite core, 90 ppb for particleboard, 110 ppb for medium density fiberboard, and 113 ppb for thin medium density fiberboard) may be used. Additionally, note that the project will still be required to demonstrate Feature 01: Air Quality Standards.

(Approved)
CalGreen 2013 Title 24, Part 11, California Green Building code has been approved as an equivalent for F04, Parts 1 and 2. For Part 3, projects are required to meet 100% of the resilient flooring requirements according to CalGreen 2013 Title 24 in order to fully comply with WELL requirements.

(Approved)
LEED is deemed an equivalent standard for Part 1. Please note that the project must adhere to the "Additional VOC content requirements for wet-applied products" section (found in LEED v 4). Additionally, all newly applied paints and coatings must be in compliance. BREEAM is deemed an equivalent standard for Part 1. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014). Additionally, all newly applied paints and coatings must be in compliance.

LEED is deemed an equivalent standard for Part 2. Please note that the project must adhere to the "Additional VOC content requirements for wet-applied products" section (found in LEED v 4). Additionally, all newly applied adhesives and sealants must be in compliance. BREEAM is deemed an equivalent standard for Part 2. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014). Additionally, all newly applied adhesives and sealants must be in compliance..

LEED is deemed an equivalent standard for Part 3. Please note that the project must adhere to the "General emissions evaluation" section (found in LEED v 4). Additionally, all newly installed flooring must be in compliance. BREEAM is deemed an equivalent standard for Part 3. Please note the project must adhere to the Volatile organic compound (VOC) emission levels for products (found in Table 18 in the BREEAM UK New Construction 2014). Additionally, all newly installed flooring must be in compliance.

LEED is deemed an equivalent standard for Part 4. Please note that the project must adhere to the "General emissions evaluation" section (found in LEED v 4). Additionally, all newly installed insulation must be in compliance.

LEED is deemed an equivalent standard for Part 5. Please note that the project must adhere to the "Furniture evaluation" section (found in LEED v 4). Additionally, 95% (by cost) of all newly purchased furniture and furnishing must be in compliance.

PLEASE NOTE: BREEAM equivalency for F04 Parts 1-3, only applies to projects that are not pursuing any BREEAM Certification.

(Approved)
Green Star Credit 13: Indoor Pollutants is considered partially equivalent to WELL Feature 04: VOC reduction.
Compliance with the Green Star credit is sufficient to comply with Parts 1 and 2, as well as to a portion of Part 3 (only flooring that is classified as carpeting) of the WELL feature.
Projects will still need to comply with Part 3 (all non-carpet flooring), as well as with Parts 4 and 5 in order to fully comply with the Feature.

(Approved)
Indoor Advantage Gold is accepted as an equivalent for F04, Parts 1, 2, 4, and 5.

(Approved.)
Field and Laboratory Emission Cell (FLEC) emissions testing is approved as an emissions testing methodology ONLY for furniture and furnishings that are made up of a uniform material and have flat testing surfaces on which the FLEC emissions testing methodology may be applied. For example, flat surfaced cabinetry that is made up of a uniform material may be tested using this methodology. However, chairs that are made from a variety of materials that lack flat surfaces may not be tested using this methodology. The emissions test must be administered by a third party investigator with no affiliation with the project. The associated costs are the responsibility of the project team.

Additional tests performed in accordance with ISO 16000 methodology must be performed for total aldehydes and 4-Phenylcyclohexane and must meet the thresholds specified in the WELL Building Standard.

(Approved.)
Products and materials that have an A or A+ class rating under the French legislation on VOC emissions meet the requirements of Parts 1, 2, 3, or 4.

Add Contractor Letters of Assurance as required documentation.

Under Part 1c, delete "VOC control" and replace with "VOC content".

Remove: "Rack space and fan capacity is in place for future carbon filters or combination particle/carbon filters." Add: "Rack space is available and rack location identified for future implementation of carbon filters or combination particle/carbon filters."

(Approved)
Projects unable to provide additional space for carbon filters may instead educate future tenants on their ability to buy and install stand-alone air purifiers with carbon filters. The project team must provide a letter signed by the project owner to confirm that if required for WELL certification in the future, the project owner will buy and install the air purifiers with filters on behalf of the tenant. It must be demonstrated that adequate wall space is accommodated to install wall-mounted air purifiers. The WELL Assessor will confirm the available wall space and examine a copy of all the information given to tenants during the project’s Performance Verification.

Change Part 1b from "The system is able to accommodate additional filters" to "The mechanical system is sized to accommodate the additional filters."

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To remove indoor and outdoor airborne contaminants through air filtration.'

(Approved.)
Multifamily Residential projects may use wall-mounted HEPA filters to meet the requirements of Feature 5 Parts 1 and 2, provided the project contains a sufficient quantity of wall mounted HEPA filters in accordance with the manufacturer’s recommended area coverage. In addition, a policy document must be provided confirming Part 3 of the Feature and that the Owner will maintain the filters for the units that are located in both common and private areas.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce mold and bacteria growth within buildings, particularly from water damage or condensation on cooling coils.'

Add: "occurring within one year prior to Performance Verification" after "building construction"

Add: "occurring within one year prior to Performance Verification" after "building construction"

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To minimize the introduction of construction-related pollutants into indoor air and protect building products from degradation.'

In Part 3, change "To prevent building materials from absorbing and later releasing VOCs emitted by other (source) materials during construction, the following requirements are met: to "To prevent building materials from absorbing water or moisture during construction, the following requirements are met:"

Remove Parts 3b and 3c.

For Part 1b, add: "(sum of indoor and outdoor length)" after "primary direction of travel"

Remove: "Permanent" from title of Part name.

(Approved)
Where projects are restricted from using an entry vestibule or revolving door (for e.g. projects in the Philippines following the National Building Code, which prohibits revolving doors or vestibules for designated exits), they may use a permanent entryway system 3 meters long, and an air curtain to create an air seal. There are several specifications for this path:
1.       The air curtain must have a minimum velocity of not less than 2 meters per second (6.56 feet per second) at the floor, have been tested in accordance with ANSI/AMCA 220, and must be installed in accordance with manufacturer's instructions. It must also be commissioned prior to occupancy by a qualified agent.
2.       An indoor pressure sensor must be installed in the building lobby that is capable of providing automatic readings at least once an hour.
3.       The project team must specify target pressurization levels for these locations when the building is occupied. These levels have to keep air from entering the building more than the standard amount, allow occupants to open and close doors easily and not cause moisture problems due to exfiltration. Projects must provide documentation of these targeted levels and ensure they achieve the objectives outlines above.

Projects must also provide indoor pressure sensor readings from one day. This should include exhaust and supply sequences. Projects should also provide mechanical drawings of the project space and manufacturer documentation of the air curtain equipment.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To minimize the introduction of pollutants into indoor air at building entrances.'

Replace the first sentence with the following: "One of the following is in place to slow the movement of air from outdoors to indoors within mechanically ventilated main building entrances:"

Remove: "c. A cleaning protocol and dated cleaning logs that are maintained and available to all occupants". Add: "c. A list of high-touch surfaces and schedule of sanitization or disinfection as specified in the Disinfection and Sanitization section in Table A4 in Appendix C"

Remove: "e. The Cleaning Equipment and Training section of Table A4 in Appendix C". Add: "e. Dated cleaning logs that are maintained and available to all occupants"

Remove: "A cleaning plan is created which includes following requirements". Add: "A cleaning plan is created that includes"

(Approved)
The EU Ecolabel and the Charter for Sustainable Cleaning have been approved as equivalents for F09, Part 1, Requirement d.
Note that Multifamily Residential Pilot projects are required to meet GS-49 for residential cleaning services rather than GS-42.

Add Part 1e with the following text: 'The Cleaning Equipment and Program Protocol section of Table A4 in Appendix C.'

(Approved)
GECA and SCS have been approved as acceptable alternatives for F09, Part 1, Requirement d.

In Part 1 description, change “… a cleaning plan is created and presented…” to “… a cleaning plan is created in accordance with Table A4 in Appendix C and presented…”

Remove: "Pestcide and herbicide use is minimized by creating a use plan based on Chapter 3 of the San Francisco Environment Code Integrated Pest Management (IPM) program". Add: "The creation of a pest management plan in place of pesticide/herbicide use, based on Chapter 3 of the San Francisco Environment Code Integrated Pest Management (IPM) program"

(Approved)
The UK Regulations Directive 2009/128/EC has been approved for F10, Part 1, Requirement a. Adopting organic farming principles described in Council Regulation (EC) No 834/2007 of 28 June 2007 has been approved as an acceptable method to comply with F10 Part 1, Requirement b.
Note that:
1. Any envisaged exemptions adopted from the SF IPM program has to be listed.
2. The public has to be notified of any pesticides use under exempt conditions
3. Annual update of the IPM plan
4. Display the IPM plan in the building communal area and/or on website
5. Engage organic gardening professional for design of landscaping, and if infestation occurs
6. Ensure that ongoing use of IPM is part of any FM contract that manages the landscaping

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce the presence of pests in buildings and minimizing occupant exposure to harmful chemicals.'

Add "c. Not more than 100 ppm (by weight) added lead in all other building materials."