WATER-3 preconditions

Question 1

Some of the chemicals used for disinfecting drinking water may combine with natural organic matter and generate byproducts sometimes correlated with reproductive disease and cancer such as

Answer 1

trihalomethanes (THMs) and haloacetic acids (HAAs)

Question 2

The WELL Water concept aims to (5)

Answer 2

1. increase the rate of adequate hydration in building users,
2. reduce health risks due to contaminated water
3. reduce health risks due to excessive moisture within buildings
4. provide adequate sanitation through better infrastructure design and operations
5. awareness and maintenance of water quality.

Question 3

Feature W01 Precondition

Water Quality Indicators

Answer 3

Verify Water Quality Indicators

• Turbidity is less than or equal to 1.0 NTU, FTU or FNU (nephelometric turbidity, formazin turbidity or formazin nephelometric units, respectively).
• Coliforms are not detected in any 100 ml sample.

Question 4

WATER- how many and which preconditions?

Answer 4

3
W01 Water Quality Indicators
W02 Drinking Water Quality
W03 Basic Water Management

Question 5

WATER- how many and which optimizations?

Answer 5

6
W04 Enhanced Water Quality 
W05 Drinking Water Quality Management 
W06 Drinking Water Promotion 
W07 Moisture Management
W08 Hygiene Support 
W09 β Onsite Non-Potable Water Reuse

Question 6

Typical technologies able to capture contaminants include (3)

Answer 6

activated carbon filters, 
ion exchange resins and 
reverse osmosis (RO) systems.

Question 7

Feature W02 Precondition
DRINKING WATER QUALITY -
parts (2)

Answer 7

Part 1
Meet Chemical Thresholds 11+3

Part 2
Meet Thresholds for Organics and Pesticides
-drinking water quality report or on-site testing
(municipal reports)

Question 8

W02 DRINKING WATER QUALITY -

Part 1 Chemical Thresholds (3/11)

Answer 8

1. provision of water dispensers

2. Arsenic ≤ 0.01 mg/L.
    Cadmium ≤ 0.003 mg/L.
    Chromium (total) ≤ 0.05 mg/L.
    Copper ≤ 2 mg/L.
    Fluoride ≤ 1.5 mg/L.
    Lead ≤ 0.01 mg/L.
    Mercury (total) ≤ 0.006 mg/L.
    Nickel ≤ 0.07 mg/L.
    Nitrate ≤ 50 mg/L as Nitrate (11 mg/L as Nitrogen).
    Nitrite ≤ 3 mg/L as Nitrite (0.9 mg/L as Nitrogen).
    Total chlorine ≤ 5 mg/L.
(11)

3. Residual (free) chlorine does not exceed 4 mg/L.

The concentration of total trihalomethanes (TTHM, sum of dibromochloromethane, bromodichloromethane, chloroform and bromoform) is 0.08 mg/L or less.

The concentration of haloacetic acids (HAA5, sum of chloroacetic, dichloroacetic, trichloroacetic, bromoacetic and dibromoacetic acids) is 0.06 mg/L or less.

Question 9

W02 DRINKING WATER QUALITY

2 Thresholds for Organics and Pesticides

Answer 9

Option 1: Drinking water quality report by municipality within last year (pesticides 2/8 & contaminants 3/10)

Option 2: On-site testing - unbiased prof/ pest&cont in dispensers

Question 10

Feature W03 Precondition
Basic Water Management-
parts 2

Answer 10

Part 1
Monitor Chemical and Biological Water Quality
Part 2
Implement Legionella Management Plan

Question 11

W03 Basic Water Management
Part 1
Monitor Chemical and Biological Water Quality tested (min.) and submitted annually for (5)

Answer 11

1 Turbidity.
2 pH.
3 Residual (free) chlorine.
4 Total coliforms, only if residual chlorine is below detection limits.
5 Any other water parameter found at 80% or above its threshold listed in W02 Part 1, as stated in the Final WELL Report or in subsequent annual sampling.

Question 12

W03 Basic Water Management
Part 2
Implement Legionella Management Plan

Answer 12

1: Legionella plan development
2: Legionella plan implementation

Question 13

Feature W04 Enhanced Water Quality
deals with (aim)
part 1

Answer 13

aesthetics and taste concerns.
-provide access to drinking water without unpleasant taste, odor and appearance.

• Meet Thresholds for Drinking Water Taste (1 point)

Question 14

The water treatment system to address nuisance chemicals (2)

Answer 14

filtration with carbon media and reverse osmosis

Question 15

Feature W04
Enhanced Water Quality
Meet Thresholds for Drinking Water Taste (1 point)
9+2

Answer 15

Aluminum ≤ 0.2 mg/L.

Chloride ≤ 250 mg/L.

Copper ≤ 1 mg/L.

Manganese ≤ 0.05 mg/L

Iron ≤ 0.3 mg/L.

Silver≤ 0.1 mg/L.

Sodium ≤ 270 mg/L.

Sulfate ≤ 250 mg/L.

Sulfide ≤ 0.05 mg/L.

Zinc ≤5 mg/L.

Total Dissolved Solids (TDS) ≤ 500 mg/L.

Free Chlorine ≤ 1.25 mg/L.

Verified by Performance Test

Question 16

W04 Enhanced Water Quality
Total Dissolved Solids (TDS) are less than
Free Chlorine ≤

Answer 16

Total Dissolved Solids (TDS) ≤ 500 mg/L.

Free Chlorine ≤ 1.25 mg/L.

Question 17

Feature W05

Drinking-Water Quality Management
2 parts

Maintain and display a consistent high quality of drinking water.

Answer 17

Part 1
Assess and Maintain Drinking Water Quality (2 points)

Part 2
Promote Drinking Water Transparency (1 point)

Question 18

Feature W05
Drinking Water Quality Management
Part 1
Assess and Maintain Drinking Water Quality

Answer 18

1: Water quality pre-test - one month before Performance Verification
sampling , before any point-of-entry water treatment system
2: Water quality monitoring
piped water, Water is tested quarterly

turbidity, coliforms, TDS, total and residual chlorine, ph
Arsenic.
Lead.
Copper.
Nitrate
Benzene.

Question 19

Feature W05 
Drinking Water Quality Management
Part 2
Promote Drinking Water Transparency (1 point)
(3)

Answer 19

• displayed near sources of drinking water or on website
• Water quality results & compliance with WELL thresholds.
• information about the treatment technologies and most recent date of device maintenance

Question 20

Feature W06
Drinking Water Promotion (1 part)

readily available and maintained dispensers for drinking water.

Answer 20

Part 1
Ensure Drinking Water Access (1 point)
1: Dispenser availability 30 m/ (airports7terminals 90 m) / directly piped through the building’s water supply/ and made for bottle refill

2: Dispenser maintenance- daily cleaned

Question 21

Feature W07 Moisture Management

aim (3)

Answer 21

Limit the potential for bacteria and mold growth within buildings from
water infiltration,
condensation
and internal leaks.

Question 22

Feature W08 Hygiene Support

This WELL feature requires projects to

Answer 22

to provide bathrooms that accommodate users with diverse needs and to improve hygiene by offering large sinks, soap containers, hand drying support and reduced touch points.

Question 23

Moisture can damage the building itself by

3

Answer 23

creating an environment hospitable to insects and other destructive pests,
corroding metal components and
degrading wood and porous building materials.

Question 24

Projects can make conditions inhospitable to mold, microbes and pests, reducing the risk to respiratory health through 4

Answer 24

1 Through effective design of the building’s curtain wall,
2 water piping assemblies
3 ventilation systems,
4 by selecting appropriate materials where condensation may occur

Question 25

Feature W07 Moisture Management

3 parts

Answer 25

Part 1
Design Envelope for Moisture Protection

Part 2
Design Interiors for Moisture Management

Part 3
Implement Mold and Moisture Management Plan

Question 26

W07
Moisture Management

Part 1
Design Envelope for Moisture Protection (1 point)

aims to minimize moisture intrusion and accumulation through the following (6)

Answer 26

1 For a project where construction occurs after registration,
-verification of site drainage and
-storm water management
during building construction phase.

2 Air tightness testing
to assess water vapor transfer.

3 Adverse vapor pressure differentials
that may cause condensation on interstitially hidden materials.
(Vapour-pressure deficit, or VPD, is the difference (deficit) between the amount of moisture in the air and how much moisture the air can hold when it is saturated)

4 Entryway design
that considers at least three strategies to minimize the ingress or permeation of water into the building.

5 Installation of a continuous drainage plane (e.g., a weather-resistant barrier integrated with flashing systems at penetrations), interior to the exterior cladding.

6 Minimization of capillary suction (wicking) in porous building materials through one of the below capillary break methods:

• free-draining spaces (e.g., between exterior cladding, weather-resistant barriers in wall assemblies).
• Non-porous materials (e.g., closed-cell foams, waterproofing membranes, metal) between porous materials.

Question 27

W07
Moisture Management
Part 2
Design Interiors for Moisture Management (1 point)

Answer 27

1: Condensation and liquid water management
(protection of moisture-sensitive building materials and selection of moisture-resistant materials or finishes
-address Condensation on cold surfaces )

2: Water leak control in fixtures
(readily accessible single-throw manual or automatic shut-off,
water treatment devices the drain or waste line is plumbed in-place and is equipped with a backflow prevention system

Question 28

backflow prevention system 2

Answer 28

air gap or a backflow preventer valve.

Question 29

W07 Moisture Management

Part 3
Implement Mold and Moisture Management Plan (1 point)
2

Answer 29

1: Operational moisture management
periodic inspection, system or inspection protocol for pipe leaks, system for occupants and tenants to notify

2: Leaks and mold inspections
Results of inspections are submitted annually

Question 30

Feature W08
Hygiene Support
4 parts

Answer 30

Part 1
Provide Bathroom Accommodations (1 point)
Part 2
Enhance Bathroom Accommodations (1 point)
Part 3
Support Effective Handwashing (1 point)
Part 4
Provide Handwashing Supplies and Signage (1 point)

Question 31

Feature W08
Hygiene Support
Part 1
Provide Bathroom Accommodations (1 point)

Answer 31

1: Bathroom Accommodations
trash receptacles , free o 50% menstrual products, hook
1 per floor accecible
1 table change for infants
syringe drop box at no cost
signage 
Floor drains are equipped with a self-primed liquid-seal trap
2: Family bathrooms-e majority of occupants are visitors 
toilate sink table for children
Motion sensor lights.
Skid resistant floors.
Safety grab bars.
hook/bags

Question 32

Feature W08
Hygiene Support
Part 2
Enhance Bathroom Accommodations (1 point)

Answer 32

hands-free flushing.
Contactless soap dispensers and hand drying.
exit the bathroom hands-free.
Faucets
Sensor-activated.
Equipped with a programmable line-purge system.
If mixing is used, hot- and cold-water lines are mixed at the point of use.

Question 33

Feature W08
Hygiene Support
Part 3
Support Effective Handwashing (1 point)

Answer 33

The faucet design prevents the water column from flowing directly into the drain
or a sink drain stopper is installed.

Does not splash outside the sink when the faucet is fully open.

Newly installed sinks meet the following design parameters:
The sink basin is at least 23 cm across in the smallest dimension, measured at the point where the user is expected to place hands during hand washing.
The water column from the faucet spout to the basin is at least 20 cm in length (measured along flow of water, even if at an angle).
The water column is at least 7.5 cm away from any edge of the sink.

Question 34

W08 Hygiene Support

Part 4
Provide Handwashing Supplies and Signage

Verified by Policy and/or Operations Schedule

Answer 34

Fragrance-free liquid hand soap dispensed through one of the following:
Sealed dispensers equipped with disposable soap cartridges.
Dispensers with detachable and closed containers for soap refill.
Soap containers must be washed and disinfected when emptied, before refilling.

One of the following methods for hand drying:
    Paper towels.
    Hand dryers equipped with a HEPA filter. Filter replacement and equipment maintenance are carried out per manufacturer’s instructions. This method is not available for healthcare projects.
    Fabric hand towel rolls with dispensers, with rolls replaced before reaching their end of service. 
Signage displaying steps for proper hand washing.