Remove: "Not more than 100 ppm (by weight) added lead". Add: "Not more than a weighted average of 0.25% lead in wetted surfaces of pipes, pipe fittings, plumbing fittings, and fixtures, and 0.20% for solder or flux used in plumbing for water intended for human consumption"

NUCOR has been deemed an acceptable standard to meet the requirements of Feature 11, Part 1. It should be noted that allowable lead content in NUCOR exceed the WELL Part 1b requirement. However, NUCOR is currently deemed best in class for sheet steel at this time.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce or eliminate occupant exposure to lead, asbestos, and PCBs from building materials.'

Add MEP Letter of Assurance as required documentation.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the potential for bacteria and mold growth within buildings from water infiltration and condensation.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To remediate construction-related indoor air contamination.'

The ISO 9972-2015 - Thernal performance of buildings - Determination of air permeability of buildings - Fan Pressurization method, is an acceptable alternative to meet WELL Feature 14 Part 1a.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To minimize air quality and thermal comfort issues resulting from the infiltration of untreated air through the building envelope.'

Remove: "The following is required in terms of the rate of outdoor air supply to all regularly occupied spaces". Add: "One of the following is required in all regularly occupied spaces"

Add: "b. Follow CIBSE AM10, Section 4, Design Calculations, to predict that room-by-room airflows will provide effective natural ventilation."

AS 1668.2 may be used in lieu of ASHRAE 62.1 for Feature 15, Part 1. Note that projects that wish to comply with AS 1668.2 must increase ventilation by 50% rather than the 30% increase required when complying with ASHRAE 62.1.

Change Part name from "Increased Fresh Air Supply" to "Increased Outdoor Air Supply"

In Part 1a, change “Exceed ASHRAE fresh air supply rates…” to “Exceed ASHRAE outdoor air supply rates…”

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the growth of pathogens, reduce off-gassing, and maintain thermal comfort by providing the appropriate level of humidity.'

Under Part 1, change the beginning of the first line to 'All cleaning and chemical storage units, all bathrooms and all rooms that contain printers and copiers…"

Add annotated mechanical and architectural drawing as required documentation, remove MEP Letter of Assurance, remove on-site spot checks.

Add: "(measured at 1.2-1.8 m [4-6 ft] above the floor)" after "once an hour"

In projects with strict data privacy requirements, the requirements of Part 3 (Environmental Measures Display) may be met by hosting the required data on a website accessible to occupants and in locations where the physical display would be located, placing signage indicating the website where the data may be accessed.

Add on-site spot checks as required verification.

For Feature 19, Part 1, a dedicated outdoor terrace can be provided. The terrace must satisfy the following requirements:a. Must be directly accessible from the tenant spaceb. Must be able to accommodate a minimum of 15% of the total regular project occupantsc. Must be adequately shaded to allow occupants to perform their work without significant glared. Feature 19, Part 2 and Part 3 must be addressed

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To increase the supply of high quality outdoor air and promote a connection to the outdoor environment by encouraging occupants to open windows when outdoor air quality is acceptable.'

Add Architect Letter of Assurance as required documentation, remove annotated architectural drawing.

Add Owner Letter of Assurance as required documentation, remove Architect Letter of Assurance.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To allow buildings to control the outdoor air supply independently from the heating/cooling needs of the building.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To improve air quality in the breathing zone of the room and maintain thermal comfort by supplying low velocity outdoor air near the floor and expelling near the ceiling.'

When desk bins are used to comply with Feature 22, Part 1, Requirement b, waste must be emptied at least once per day. Bins must be lined with appropriate liners (e.g. biodegradable liners for the compost bin) that will sufficiently retain all waste and waste residue. Bins must be wiped to remove waste residue when present or at least weekly.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce the presence of pests in buildings and minimize occupant exposure to pest-related allergens.'

Inquiry: For Part 1b, our garbage cans are integrated into casework. The casework has a 6 inch opening at the top for users to insert waste. The garbage is collected from the garbage cans daily to minimize the time that waste remains in the garbage cans. Will this design meet the requirements of Part 1b?Ruling: No, the design as described is not approved. The openings are large enough to allow pests to gain access to the garbage and allow for discarded trash to fall outside the garbage receptacle within the casework.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To improve recirculated indoor air quality through the implementation of advanced air purification strategies.'

The following equivalencies have been approved for Feature 24 Part 4:1. Non-road diesel engine vehicles - Euro Stage IIIA, US Tier 3 and 2, Japan MoE standards.2. On road diesel engine vehicles - Euro V (2012) standard.It should be noted that Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V (2012) standard's allowable emission levels exceed those required in US Tier 4 and US EPA 2007. However, Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V are currently deemed best in class within Hong Kong at this time.It should be noted that Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V (2012) standard's allowable emission levels exceed those required in US Tier 4 and US EPA 2007. However, Euro Stage IIIA, US Tier 3 and 2, Japan MoE and Euro V are currently deemed best in class within Hong Kong at this time.

Projects that wish to include a gas range within the project scope must provide range hoods with increased exhaust efficiency in order to exhaust combustion byproducts. The range hood must provide at least 100 cubic feet per minute of exhaust air for every 10,000 BTU’s of burner output. If the burner output is unknown or cannot be guaranteed, then the range hood should provide a minimum of 600 cubic feet per minute of exhaust air. In addition, the range hood shall be exhausted directly to the outdoors.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce occupant exposure to combustion-related air pollution from heating and transportation sources.'

Remove: "(Please refer to Table A3 for additional details.)"

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To minimize the impact of hazardous building material chemicals on indoor air quality and protect the health of manufacturing and maintenance workers.'

Add Contractor Letters of Assurance as required documentation.

Remove: "At least one of the following requirements is met". Add: "At least 25% of products by cost (including furnishings, built-in furniture, all interior finishes and finish materials) meet one or more of the following requirements"

Remove: "At least 25% of products by cost (including furnishings, built-in furniture, all interior finishes and finish materials) are Cradle to Cradle™ Material Health Certified with a V2 Gold or Platinum or V3 Bronze, Silver, Gold or Platinum Material Health Score". Add: "Have a Cradle to Cradle™ Material Health Certified with a V2 Gold or Platinum or V3 Bronze, Silver, Gold or Platinum Material Health Score."

Remove: "At least 25% of products by cost (including furnishings, built-in furniture, all interior finishes and finish materials) meet some combination of the certifications described in requirements b and c".

Add Contractor Letter of Assurance as required documentation, add Owner Letter of Assurance as required documentation.

Remove: "that has an output of at least 4 mW/cm²" after "UV cleaning device"

Add annotated architectural drawing or operations schedule as required documentation, remove architect Letter of Assurance.

Remove: "Free of sharp internal angles, corners and crevices". Add: "Free of crevices and other hard-to-reach places"

Add on-site spot checks as required verification.

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To reduce occupant exposure to both harmful pathogens and hazardous chemicals through the use of high quality cleaning equipment and the proper storage of cleaning agents.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the presence of sediment and water-borne pathogens in water designated for human contact.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the presence of inorganic contaminants in drinking water.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the presence of organic contaminants in drinking water.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the presence of agricultural contaminants in drinking water.'

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To limit the presence of certain disinfectants, disinfection byproducts and fluoride in drinking water.'

Change “All water being delivered to the project area for human consumption meets the following limits:” to “All water being delivered to the project area for human consumption (at least one water dispenser per project) meets the following limits:

In the Feature description, remove the second paragraph. Replace with the following text:
'Intent: To maintain high quality water through regular water quality monitoring and remediation.'

Remove: "or showers/baths"

Remove: "or showers/baths"

In Part 2a, remove "Filter rated to remove suspended solids." And replace with "Filter rated to remove suspended solids with pore size 1.5 µm or less."

For regularly occupied spaces that are not within 30 meters (100 feet) of a drinking water station, pitchers of filtered water and glasses may be provided that are monitored and refilled through the day. The Operations Schedule for the project must include information regarding the provision (location and quantities) of water and the monitoring and refilling of pitchers if this strategy is used.

Remove: "If solid foods are sold or distributed" before "on a daily basis". Add: "If foods are sold or provided"