The following tables are referred to in various requirements of the WELL Building Standard™. The first letter of the table name denotes the concept chapter it refers to, e.g. "A" for Air.
Table A1: High-Touch Surfaces
These are surfaces that require more frequent and thorough sanitization. Cleaning protocols should list these surfaces within the project and incorporate the correct cleaning instructions accordingly. Based on CDC Environmental Checklist for Monitoring Terminal Cleaning.
|Public digital devices and keyboards|
|Bathroom handles and fixtures|
|Countertops in bathrooms|
|Toilet handles and lids|
|Bathtubs and shower walls and floor|
|Interior shower and bath surfaces|
|Kitchen handles and fixtures|
|Countertops in kitchens|
|Non-disposable medical devices|
|Serving trays and bed tables|
|Upholstered furniture covers|
|Bedding: linens, pillow cases and comforter|
Table A2: Reduced Risk Pesticides
If a pesticide has not yet been evaluated by the Pesticide Research Institute's tools above, use the Guide to the San Francisco's Reduced Risk Pesticide List Hazard Tier Review Process, which outlines the procedure for evaluating pesticides.
Table A3: (Removed in Q2 2017 Addenda)
Table A3 was removed from the WELL Building Standard as part of the Q2 2017 Addenda process. However, please note that the remaining tables (Table A4 and Table A5) were not renumbered so that project teams that registered prior to the release of the Q2 addenda can continue to access these tables as they had previously.
Table A4: Cleaning Protocol
Cleaning Practice Evaluation
An effective cleaning protocol must consider equipment use and staff training. A project's cleaning practice must include or be evaluated to incorporate the following changes and/or additions.
Projects must implement a program for the use of sustainably powered cleaning equipment that abide by Green Seal 42, Standard for Commercial and Institutional Cleaning Services for Powered Equipment Use/ Maintenance Plan or local equivalent for projects outside the United States. Additionally, the following requirements must be met:
- For projects in humid climates, as designated by ANSI/ASHRAE/IESNA 90.1-2007, powder carpet cleaning systems must be used in place of traditional carpet extraction systems.
- Battery-powered equipment must be equipped with environmentally preferable gel batteries.
- Equipment must be designed with safeguards, such as rollers or rubber bumpers, to reduce potential damage to building surfaces.
A successful cleaning program requires, beyond the selection of safer products, proper training and use of green cleaning materials and products. Projects must have in place a cleaning program that addresses each of the following:
- Chemical Measuring and Dilution: A control system; for example a wall mounted dispensing system for concentrates, that limits direct handling and worker exposure to chemicals, ensures proper dilution of mixtures and prevents overuse or waste.
- Training on Procedures: Sequencing of cleaning steps and use of personal protective equipment.
- Training on Safety: Training on how to reduce and prevent ergonomic injuries and exposure to hazardous materials.
- Annual In-Service Training: Training on use of certified green cleaning products, materials and equipment.
- Training on Purchasing: Training of purchasing personnel in the selection of green cleaning materials.
Cleaning, Disinfection and Hand Hygiene Product Selection
By establishing criteria that consider human health endpoints, certified cleaning products eliminate harmful ingredient contents and reduce potential associated hazards. Cleaning, disinfection, sanitization, hand soap and sanitizers selected for use must meet the below criteria. These include products such as EPA’s Safer Choice, GreenSeal, Environmental Choice New Zealand, EU Ecolabel, Nordic Ecolabel etc.
- Cleaning products, per appropriate functional class or use case, are not formulated or manufactured with intentionally added ingredients that are:
- Classified under the Globally Harmonized System (GHS) with one or more of following hazard statements: H340 (May cause genetic defects), H350 (May cause cancer), or H360 (May damage fertility of the unborn child)
- Classified under GHS with the following hazard statement: H372 (Causes damage to organs through prolonged or repeated exposure)
- Classified under the Globally Harmonized System (GHS) with one or more of following hazard statements: H317 (May cause an allergic skin reaction), H334 (may cause allergy or asthma symptoms or breathing difficulties if inhaled).
- Soaps, shampoos and hand sanitizers provided by the project:
- Use no antimicrobial agents (other than as a preservative) except where required by health codes and other regulations (e.g., food service and health care requirements).
Disinfection and Sanitization
High-touch surfaces present increased risk for contamination, particularly in high transit areas. A cleaning protocol must take into account the degree to which disinfection and sanitization are necessary. Unnecessary disinfection and sanitization can negatively impact immune health. Disinfection and sanitization reduce exposure to microorganisms and parasites that can result in decreased disease and illness, however these practices are also increasingly linked to a rising prevalence of hypersensitivity disorders and autoimmune diseases, especially in industrialized nations.
To effectively apply these cleaning principals, projects must:
- Maintain a list of high touch surfaces.
- Limit disinfection to high-touch surfaces.
Entryway maintenance and care is critical to minimizing dirt and pollutants tracked in from the outdoor environment. Clean and well-maintained entryways can contribute greatly to improved indoor air quality.
Entryways and Lobbies
In order to minimize the migration of contaminants into the building, projects shall adhere to the below cleaning and maintenance guidelines for entryways and lobbies:
- Walk-off mats, indoor and outdoor, should be wet-cleaned at least once every two days and allowed to dry before being used.
- The underside of entry mats should be cleaned at least once a day and twice a day during inclement weather.
- Entry mats must be vacuumed using a vacuum with a beater bar in both directions, at least once a day and twice a day during inclement weather.
- Non-toxic and environmentally safe ice melting compounds (e.g., non-corrosive, non- phosphate) must be selected through the winter months.
Table A5: Mercury Limits
This table indicates allowable mercury limits in lamps, as referred to in the Fundamental Material Safety feature. Values from LEED PBT source reduction - mercury prerequisite
|Lamp||Maximum Hg Content|
|Compact, integral ballast||3.5 mg|
|T-5, circular||9 mg|
|T-5, linear||2.5 mg|
|T-8, eight-foot||10 mg|
|T-8, four-foot||3.5 mg|
|T-8, two- and three-foot||3.5 mg|
|T-8, U-bent||6 mg|
|Lamp||Maximum Hg Content|
|400 W or less||10 mg|
|Over 400 W||32 mg|
Table N1: Produce Storage Temperatures
This table specifies appropriate temperature ranges for storing produce. Information is adapted from the Cornell Storage Guidelines for Fruits and Vegetables.
|Rosaceae (Apples, Cherries, Peaches, Pears and Strawberries|
|Solanaceae (Eggplant, Peppers, Potatoes and Tomatoes)|
|Cucurbitaceae (Cantaloupe, Cucumbers, Summer Squash, Watermelon and Winter Squash)|
|Asteraceae (Artichokes, Endive/Escarole and Lettuce|
|Umbelliferae (Carrots, Celery, Fennel, Parsley and Parsnips)|
|Chenopodiaceae (Beets, Spinach and Swiss Chard)|
|Brassicaceae (Broccoli, Brussel Sprouts, Cabbage, Cauliflower, Collards, Kale and Radishes)|
|Amaryllidaceae/Liliaceae (Asparagus, Chives, Garlic, Leeks and Onions)|
Table L1: Melanopic Ratio
The Equivalent Melanopic Lux (EML) is a measurement of light's effects on the circadian cycle.
This unit Equivalent Melanopic Lux (EML) was proposed by Lucas and others (Lucas et al., "Measuring and using light in the melanopsin age." Trends in Neuroscience, Jan 2014). The authors provided a toolbox which for a desired spectrum derives equivalent “α-opic” lux for each of the five photoreceptors in the eye (three cones, rods, and the ipRGCs). The authors selected scaling constants such that each of the values would be identical to each other and the standard definition of lux for a light spectrum of perfectly uniform energy (CIE Standard Illuminant E).
Given a spectrum of light, each equivalent α-opic lux is related to each other by a constant.
To calculate the equivalent melanopic lux (EML), multiply the visual lux (L) designed for or measured in a building by this ratio (R): EML = L × R. For example, if incandescent lights provide 200 lux in a space, they will also produce 108 equivalent melanopic lux. If daylight is modeled to provide the same visual brightness (200 lux), it will also provide 220 equivalent melanopic lux.
Table L2: Melanopic and Visual Response
To calculate the melanopic ratio of light, start by obtaining the light output of the lamp at each 5 nm increment, either from manufacturer or by using a spectrometer. Then, multiply the output by the melanopic and visual curves given below to get the melanopic and visual responses. Finally, divide the total melanopic response by the total visual response and multiply the quotient by 1.218.
Although the ipRGCs have a peak sensitivity at about 480 nm, the melanopic response in this table peaks at 490 nm because it takes into account the adult eye's lens, which preferentially transmits longer wavelength light.
|Wavelength||Light Output||Melanopic Curve||Melanopic Response||Visual Curve||Visual Response|