Greenstuf has been accepted as an equivalent for CDPH Standard Method v1.1-2010 of Feature 4 Part 4.

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.

In Parts 3, 4 and 5 of this Feature, change 'VOC content' to 'VOC emissions'

Floorscore has been approved as an equivalent standard F04, Parts 2 and 3.

GECA FFFv2.1i-2010 (Furniture, Fittings and Foam) has been accepted as an equivalent for the ANSI/BIFMA e3-2011 Standard and M7.1-2011 Method of Part 5.
Note that not all the VOCs required byANSI/BIFMA e3-2011 are incorportated in this standard and the allowable emission levels in GECA FFFv2.1i-2010 exceed those required in the ANSI/BIFMA e3-2011 Furniture Sustainability Standard.
This equivalency may only be used for projects in Australia and New Zealand.

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.

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

Under Part 2c, delete "VOC control" and replace with "VOC content".

Remove: 27 Apr, 2017 AAP "Projects registered as... Feature 05, Part 1: Filter Accommodation."

In a project with a split-system air conditioning unit that does not allow for accommodating MERV 13 filters, the following measures may be implemented as an alternative. For Parts 1 and 2a of this feature, a standalone air purifier with carbon filter and HEPA filter performing equivalent to MERV 17-20 may be used in accordance with manufacturer’s guidelines. Installation of the HEPA filters may not be conditional based on the criteria in Part 2b. A sufficient quantity of stand-alone air purifiers and carbon filters and HEPA filters must be provided in accordance with the manufacturers recommended area coverage. Provide a policy document to confirm Part 3 of this Feature, and a policy document that confirms that the project owner will maintain and replace the filters and filter units located within the project as per manufacturer specifications.

Add "or combination particle/carbon filters." to the end of Part 1a. Part 1a now reads "Rack space and fan capacity is in place for future carbon filters or combination particle/carbon filters."

Class F 7 (or higher) media filters are an acceptable equivalent to MERV 13 (or higher) media filters.

In lieu of installing rack space for future carbon filters, an execution plan for future modifications to the HVAC system to create rack space for carbon filters may be provided in the event that the installation of carbon filters is a requirement of the WELL Building Standard in the future. To follow this approach, it must be confirmed that the system would be able to physically accept carbon filters should the necessary rack space be created, the plan must identify the cost estimates of renovating the HVAC system to include the necessary rack space to confirm that it is considered a capital improvement item, and the owner must commit to making the upgrades should the WELL Building Standard require carbon filters in a future recertification of the project.

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: "newly installed" after "all"

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

Change title of Part 3 from "VOC Absorption Management" to "Moisture Absorption Management"

In Part 3a, change “A secure area is designated to store and protect…” to “A separate area is designated to store and protect…”.

Projects may achieve Feature 08, Part 1 by developing and using a comprehensive floor cleaning plan at entrances which details the cleaning products and equipment that will be used to clean various surfaces on a daily basis.
In addition to original documentation requirements, project teams submit a professional narrative which specifies cleaning products and equipment, protocols for post-inclement weather situations and a checklist with daily tasks that are completed at least two times per day.

In 24 Oct, 2016 AAP, remove: "Where the options of an entry vestibule or revolving door are not possible for projects with regularly occupied lobbies, projects". Add: "Projects"

In 24 Oct, 2016 AAP, remove: ""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"". Add: ""To document this alternative adherence path, the project team must provide the following in the Documentation Submission:

- Indoor pressure sensor readings in accordance with ANSI/ AMCA 220 including exhaust and supply sequences from a single day
- Mechanical drawings of the project space and manufacturer documentation of the air curtain equipment""

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

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

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.'

Projects 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.

To document this alternative adherence path, the project team must provide the following in the Documentation Submission:

• Indoor pressure sensor readings in accordance with ANSI/ AMCA 220 including exhaust and supply sequences from a single day
• Mechanical drawings of the project space and manufacturer documentation of the air curtain equipment

The requirements of Part 2 (Entryway Seal) may be met by controlling building pressure according to the following requirements:

- An indoor pressure sensor must be installed in the building lobby and near any other entrance to the building from the outside. The pressure sensor must be capable of providing automatic readings on a frequency of at least one per hour.
- The project team must specify the targeted building pressurization levels for these locations for when the building is in both cooling mode and heating mode. The pressure levels must keep outside air from entering the building (more than standard practice), allow occupants to open and close doors easily, and must not cause undue condensation or other moisture problems due to exfiltration through the building envelope.

To document this alternative path, the project team must provide the following in the documentation application submission:
- A narrative describing the targeted building pressurization levels for both cooling mode and heating mode.
- A narrative (and other supporting documentation as necessary) demonstrating that the pressure levels keep outside air from entering the building (more than standard practice), allow occupants to open and close doors easily, and do not cause undue condensation or other moisture problems due to exfiltration through the building envelope.
- Indoor pressure readings demonstrating one day of pressure sensor readings from a cooling period, and one day of pressure sensor readings from a heating period. The exhaust and supply sequences must be provided to demonstrate that the desired pressure readings will be achieved.

For Part 1b, remove: "A list of approved product seals with which". Add "A list of products that"

Where securing products that meet Hazard Statement requirements set in Table A4 is problematic, the project can submit documentation demonstrating an attempt has been made, including a petition or formal request filed with at minimum three manufacturers/labels (per product category). The project is then permitted instead to use products that meet Type 1 eco-labeling program, as defined by ISO 14024:H929:1999 and developed by a member of the Global Ecolabelling Network.

In system diagram, add: "Respiratory" and "Integumentary" to diagram and to list under diagram of body system

The Eco Mark Program has been accepted for Feature 09, Part 1.

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

Remove: "b. A list of approved product seals with which all cleaning products must comply (See Table A4 in Appendix C)". Add: "b. A list of approved product seals with which all cleaning, disinfection and hand hygiene products must comply in accordance with the Cleaning, Disinfection and Hand Hygiene Product section in Table A4 in Appendix C."

Remove: "d. A cleaning schedule that specifies the extent and frequency that a surface is cleaned, sanitized, or disinfected in accordance with the Disinfection and Sanitization and Entryway Maintenance sections of Table A4 in Appendix C". Add: "d. A cleaning schedule that specifies the extent and frequency of cleaning, including the Entryway Maintenance section of Table A4 in Appendix C"

The A.I.S.E. Charter for Sustainable Cleaning has been accepted as an alternative for Requirement (d) of Feature 9 Part 1.
Note that Multifamily Residential Pilot projects are required to meet GS-49 for residential cleaning services rather than GS-42.

Change Part 1b text to: 'A cleaning schedule that specifies the extent and frequency that a surface is cleaned, sanitized or disinfected in accordance with the Disinfection and Sanitization and Entryway Maintenance sections of Table A4 in Appendix C.'

Remove Waste stream management section from the Cleaning Protocol guidelines.

The EU Ecolabel has been accepted as an alternative for Requirement (d) of Feature 9 Part 1.
Note that Multifamily Residential Pilot projects are required to meet GS-49 for residential cleaning services rather than GS-42.

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…”

AVA Pesticide Registration has not been accepted as an alternative for the requirements of Feature 10 – Pesticide Management.

The European Regulations 1107/2009/EC and 528/2012/EU have been accepted as alternatives for the requirements of Feature 10 Part 1b.

Malmö Stads Riktlinjer för Kemisk Bekämpning (2015) (The City of Malmoe’s Guidelines for Pesticide Use, 2015) of Sweden has been accepted as an equivalent to the San Francisco Environment Code Integrated Pest Management (IPM) program of Feature 10 Part 1.

In system diagram, add: "Urinary" to diagram and to list under diagram of body system

Remove: "The following conditions are met for all pesticides and herbicides used on outdoor plants". Add: "Pesticide and herbicide use on outdoor plants is eliminated, or hazards are minimized through one of the following:"

Remove: "Only pesticides with a hazard tier ranking of 3 (least hazardous) as per the City of San Francisco Department of the Environment's (SFE) Hazard Tier Review Process are used. Refer to Table A2 in Appendix C for more details". Add: "Use of hazard-ranked pesticides based on screening lists described in Table A2 in Appendix C."

Under Part 1b, remove "Reduced Risk Pesticide List" and replace with "Hazard Tier Review Process"