Lombardo Associates, Inc.
Representative Project Descriptions

Sustainable Water Management
 Roof Runoff Reuse Green Roofs

Water Sustainability
Wastewater Reuse, Rain Water
Harvesting & Green Roofs

Wastewater Reuse
What is “Wastewater Reuse”? The use of treated gray water or total wastewater effluent for beneficial
nonpotable purposes such as toilet flushing, irrigation, cooling tower make-up, industrial processes, dustcontrol, etc.
Wastewater reuse can be grouped into the following categories:¾ In-Building— toilet flushing, cooling tower make-up waterand fire protection.

BENEFITS OF REUSE

¾ Landscape Irrigation— commercial, residential and publicplaces¾ Industrial reuse— process or makeup/cooling tower water.
¾ Agricultural reuse— irrigation of nonfood crops, such as
fodder and fiber, commercial nurseries, and pasture lands.
High-quality reclaimed water is used to irrigate food crops.
¾ Recreational impoundments— such as ponds and lakes.



Guaranteed water supplyeven in times of drought
when potable use isrestricted;
Treated wastewater has
nutrients and will reduce
costs of fertilizer;
Will reduce or eliminate
effluent discharge¾ Environmental reuse— creating artificial wetlands,
enhancing natural wetlands, and sustaining stream flows.

Sustainable, Integrated Water Process Flow Diagram
Landscape Irrigation
Rain
Rainwater Harvesting Roof Run-Off

WWTP*

Reuse forToilet Flushing

Irrigation
Storage Tank

Ponds/Rain
Gardens

Development*WWTP - Wastewater Treatment Plant

Landscape Stormwater Runoff - Capture & Treatment

Rain

Existing
StormDrainSystem

Rain Water Harvesting
What is “Rainwater Harvesting”?
Rainwater
harvesting is an innovative alternative water supply
which captures and stores rainwater for later use.
Captured rainwater is used for toilet flushing,landscaping, and other non-potable purposes.
Although rainwater is relatively clean and thequality is usually acceptable for many purposes,
filtration and disinfection is usually appropriate.
Implementing rainwater harvesting techniques
provides direct benefits by reducing:demand on the water supply
run-off, erosion
contamination of surface water

Rainwater may also be filtered and dispersed forgroundwater recharge.

Rainwater Harvesting with an Underground Storage Tank

Example of a Small Home using Rainwater for Reuse

Rainwater harvesting systems can provide water at or near
the point where water is needed or used.

oSizing of system dependent on rainfall patterns and nonpotable water demandoRainwater harvesting in urban areas canhave multiple reasons:Provides supplemental water for thebuilding requirement

Mitigates flooding and Combined
Sewer Overflows (CSOs)

Rainwater Treatment Equipment

Green Roofs
What is a “Green Roof”? A Green Roof is the roof of a building that is either partially or completely coveredin vegetation and/or soil. They can either be:

Extensive—Lightweight roofs, utilizing soil depths of 2-6 inches, with small vegetation
Intensive—Heavy roofs, designed with increased soil depths and larger vegetation

EXTENSIVE DESIGNINTENSIVE DESIGN

Why Green Roofs? Green roof technologies not only provide the owners of buildings with a proven return on
investment, but also represent opportunities for significant social, economic and environmental benefits for thegeneral public.
Public BenefitsImproved Air Quality & Temperature Regulation- A green roof will not only absorb heat, decreasing
the tendency towards thermal air movement, but will also filter the air moving across it.

Stormwater Retention & Water Filtration- Green roofs not only retain the rainwater, but also moderate
the temperature of the water and act as natural filters for any of the water that happens to run off

Private Benefits
Cost savings opportunities for the building owner¾ Protection of roof membrane resulting in a longer
material lifespan¾ Savings on energy heating and cooling costspotential to reduce the size of HVAC equipment onnew or retrofitted buildings (capital and operationalsavings).
¾ Potential to reduce the amount of standard insulation
used and incorporate cooling and/or water treatment
functions.
¾ Potential to meet regulatory requirements forstormwater management & reduce/eliminate roof
drains.

Sound Insulation- Soil, plants and the trapped layer of air
can be used for sound insulation.

Public Policy benefits/incentives- Green roofs can facilitate a significant improvement in the LEEDtm
rating of a building, contributing as many as 15 credits under the system, depending on design and levelof integration with other building systemsExamples of Sustainable Water Projects
La Paz Development, Malibu, CAWater Reuse – No Discharge SystemMalibu La Paz – Entry

Design Flow: 28,000 gpd


11 Commercial Buildings
2 Restaurants (175 seats/each)
New City Hall

No Wastewater Discharge is achieved by:
In-Building Reuse – Toilet FlushingLandscape Irrigation

Water use reduction of 60% will be achieved.

With Water Reuse & Rainwater Harvesting:
Potable Water Demand reduced 60% for La Paz
and 63% for Sycamore Village.

Sycamore Villages, Malibu, CARainwater Harvest & Water Reuse –No Discharge SystemThe development consists of a combination of
65,000 square feet of office and retail space andrestaurants with 300 seats.
The system will use roof runoff and treatedwastewater for toilet flushing and landscapeirrigation. Water use will be reduced by 63%.
Malibu Sycamore Village

MIT, Cambridge, MA Rainfall Harvest
Campus-Wide Water Reuse & Conservation Plan
¾ Water conservation and reuse projects were developed to reduce up to 80% ofMIT’s non-potable water demand, including cooling tower make-up for on-site
power plant.
¾ A result of these projects would be to reduce the demand on the Cambridge,
MA water supply system and have a simple payback of <10 years.

Water reuse of
approximately
110,000 gpd wasreadily feasible,resulting in anannual water/
sewer savings of$ 340,000

Kentucky Horse Farm Rainwater Harvesting¾ Covered arena with roof area of 112,500 sf.
¾ Reuse for the April – Oct period for irrigation &dust control¾ 40,000 gallon storage tank
¾ Filtration and UV disinfection with pumps forpressure discharge to tanker truck and irrigation
system

23852 Pacific Coast Highway #502Malibu, CA, 90265

www.LombardoAssociates.com