Appendix C: Tables
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: Materials Restrictions
This table specifies the harmful chemicals found in building materials that are disallowed by the WELL Building Standard in the features listed below.
Feature : Fundamental material safety
|Neutral anhydrous carbonate PbCO₃||598-63-0|
|Lead sulfate Pbx SO₄||15739-80-7|
|Lead sulfate PbSO₄||7446-14-2|
|Trilead-bis(carbonate)- dihydroxide 2Pb CO₃-Pb(OH)₂||1319-46-6|
Feature : Toxic material reduction
|Methylene diphenyl diisocyanate||101-68-8/9016-87-9|
Table A4: Cleaning Protocol
Cleaning Practice Evaluation
An improved cleaning protocol is achieved through a baseline assessment or evaluation prior to incorporation of appropriate changes. A project's cleaning practice must be evaluated to best 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 envir 2. onmentally preferable gel batteries.
- Equipment must be designed with safeguards, such as rollers or rubber bumpers, to reduce potential damage to building surfaces.
- Where possible, equipment that eliminates or reduces chemical use and qualifies as a sanitizing device under EPA when used with water and no chemicals, including steam vapor equipment and spray/vacuum touch-free cleaning systems, must be used.
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 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 Product Selection
Eco-label certifiers: Design for the Environment (DfE), EcoLogo and Green Seal address the human health, ecological toxicity and environmental fate characteristics of chemical ingredients used in cleaning products. By establishing specifications that prioritize ingredients that pose the least concern among chemicals in their class, these eco-label certifiers reduce potential hazards associated with use of cleaning products. When selecting cleaning products, all projects must comply by below guidelines (adopted from U.S. Green Building Council’s LEED for Existing Buildings: Operations & Maintenance Rating System Version 4). For projects outside the United States, any Type 1 eco-labeling program as defined by ISO 14024: 1999 developed by a member of the Global Ecolabelling Network may be used in place of Green Seal or UL EcoLogo standards.
Cleaning Products by Functional Class
Cleaning products must meet the relevant standard per appropriate functional class or use case, or a local equivalent for projects outside the United States.
- Green Seal GS-37, for general-purpose, bathroom, glass and carpet cleaners used for industrial and institutional purposes.
- UL EcoLogo 2792, for cleaning and degreasing compounds.
- UL EcoLogo 2759, for hard-surface cleaners.
- UL EcoLogo 2795, for carpet and upholstery care.
- Green Seal GS-40, for industrial and institutional floor care products.
- UL EcoLogo 2777, for hard-floor care.
- UL EcoLogo 2798, for digestion additives for cleaning and odor control.
- UL EcoLogo 2791, for drain or grease trap additives.
- UL EcoLogo 2796, for odor control additives.
- Green Seal GS-52/53, for specialty cleaning products.
- EPA Design for the Environment Program’s Standard for Safer Cleaning Products.
Hand Hygiene Products
Hand soaps and hand sanitizers must meet the relevant standard per appropriate functional class or use case, or a local equivalent for projects outside the United States.
- 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).
- Green Seal GS-41, for industrial and institutional hand cleaners.
- UL EcoLogo 2784 or EPA’s Design for the Environment, for hand cleaners and hand soaps.
- UL EcoLogo 2783, for hand sanitizers.
- EPA Design for the Environment Program’s standard for safer cleaning products.
Disposable janitorial paper products and trash must meet the relevant standard per appropriate functional class or use case, or a local equivalent for projects outside the United States.
- EPA comprehensive procurement guidelines for janitorial paper.
- Green Seal GS-01 for tissue paper, paper towels and napkins.
- UL EcoLogo 175 for toilet tissue.
- UL EcoLogo 175 for hand towels.
- California integrated waste management requirements (California Code of Regulations Title 14, Chapter 4, Article 5, or SABRC 42290-42297 Recycled Content Plastic Trash Bag Program) or EPA comprehensive procurement guidelines for plastic trash can liner.
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. Although reduced exposure to microorganisms and parasites can result in decreased disease and illness, it is also increasingly linked to a rising prevalence of hypersensitivity disorders and autoimmune diseases, especially in industrialized nations.
Cleaning for Health
Projects must limit disinfection to high-touch surfaces in areas including but not limited to restrooms, community rooms, gymnasium and workout areas in accordance with Green Seal 42, Standard for Commercial and Institutional Cleaning Services Edition 2.1, 2013.
- Disinfection (Section 4.6, with the exception of product specification in 4.6.2)
- Restroom Care (Section 4.7)
- Dining Areas and Break Rooms (Section 4.8)
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 must adhere to the below cleaning and maintenance guidelines for entryways and lobbies:
- Walk-off mats, indoor and outdoor, should be wet-cleaned 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.
Waste Stream Management
Waste reduction, recycling, management can help reduce the amount of waste sent to landfills and incinerators and help conserve natural and raw resources. A project must have an active waste reduction and recycling program, including the diversion of landscape waste.
Waste Collection and Recycling
Project recycling and collection of waste must:
- Be conducted in accordance with Green Seal 42, Standard for Commercial and Institutional Cleaning Services, Cleaning Procedure Requirements, Trash Collection and Recycling, Section 4.9.
- Provide a protocol for the diversion of landscape waste through strategies that include mulching lawn mowers, composting or similar low impact means.
Waste Stream Assessment
An audit, including data evaluation and documentation, must be executed in accordance with LEED EBOM-2009 MRc6: Solid Waste Management Waste Stream Audit to achieve:
- Effective opportunities for waste source reduction.
- Education of building occupants and cleaning staff on results of audit and effective means for waste stream reduction.
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
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. The table below shows the example ratios between the equivalent melanopic lux and the standard visual lux for several sources.
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.
Similar melanopic ratios can be determined by incorporating the spectrum of the desired source into the calculations in Table L2. Projects are encouraged to use this approach to obtain more accurate results. Both the authors of the journal article and the IWBI have spreadsheets to aid in this calculation.
|5450||CIE E (Equal Energy)||1.00|
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|