High Tech High Chula Vista is the first school to be built in the City's University Park and Research Center. As the pioneer in this development, it was important to design a building and campus that set set a high standard for sustainability and aesthetics.
From the outset of the planning process HTHCV was designed to be the most sustainably designed and operated school in San Diego County, and a great place to learn. Pre-fabricating major building components off-site not only accelerated the construction schedule, it also increased the ability to control material use and increase quality, and reduce construction waste and site disturbance.
Similar to earlier HTH schools, HTHCV incorporates essential elements such as enhanced acoustics, abundant daylighting, and stringent indoor air quality standards. A photovoltaic (PV) solar electric panel system on the roof is generating approximately 115% of the school’s electrical demand. When the school is fully occupied in the Fall of 2010, the system will still provide over 80% of the school’s electrical demand.
The project has been submitted for the EPA Energy Star Program, Collaborative for High Performance Schools (CHPS) Verification, and US Green Building Council LEED Gold Certification. Results for these certifications are due by February, 2010. Other points: - Energy performance is optimized to far exceed California Title 24 energy efficiency requirements, and the result is a documented 54% energy cost savings over a school that meets the already-stringent code requirements. - HTHCV is extremely energy efficient, and therefore the large solar photovoltaic array produces more energy than the school consumes in the first year. By the third year, it is anticipated that the solar system will produce as much as 80% of the school’s energy demand.
This renewable energy source is grid-connected, serving the entire community, and is done in partnership with the SDG&E Sustainable Communities Program. - As further commitment to reduce greenhouse gas emissions by utilizing renewable energy sources, HTHCV entered into a contract with Sterling Planet to purchase 100% of the school’s required power through only Green-e Certified power producers, which includes biomass, solar, and wind power generation certified sources. - Water efficient fixtures and operations results in a 52% water savings over the EPA guidelines.
Located on a small triangular lot located at 54th Street and Chollas Parkway in City Heights, a grass roots effort has taken hold to create a community farm for the surrounding neighborhood. Spearheaded by San Diego's Somali Bantu Community Organization, this farm plot will be the first of its kind for this neighborhood. It will provide fresh fruits and vegetables to the community and may also provide an economic opportunity to sell the produce local businesses.
Beginning in 2006, Hamadi Jumale, a Somali refuge, teamed with the San Diego office of the International Rescue Committee (IRC), a non-governmental agency that assists refugees worldwide, to find and acquire a parcel of land that would give the women of his community an opportunity to produce something. Amy Lint, IRC’s New Roots Farm Coordinator and others who have worked closely with Jumale say that in addition to creating a much-needed outlet for the talents of the Bantu women, his efforts have established a link to their fading culture.
Open since mid-July, the New Roots Community Farm is a raw patch of land located on 2.2 acres of city property with the potential to supplement the diets of hundreds if not thousands of low-income individuals living in greater San Diego. Several other communities, including Vietnamese, Cambodian and Guatemalan groups, are taking part in the farm. This is an enormous opportunity for a community that does not always have even their basic needs met. These farms plots will provide not only sustenance but will also carry forth the tradition of numerous cultures who call City Heights home.
In January 2009 the County of San Diego proudly opened the San Elijo Lagoon Nature Center. This is the first public agency building in San Diego to obtain a LEED PLATINUM certification. The educational facility utilizes a multitude of innovative LEED features and incorporates state-of-the art, interactive exhibits that showcase the local ecology and the environmental benefits of the LEED program.
The San Elijo Lagoon Nature Center’s goal is to increase awareness and education of sustainability and the environment. In support of this effort the building was designed by Zagrodnik + Thomas Architects to meet the Platinum Certification requirements of the LEED program. The building incorporates green building elements including radiant floor heating, green planted roof, recycled cotton insulation, certified renewable lumber, photovoltaics that will provide 52% of energy requirements, natural daylighting and ventilation, stormwater filtering, and native vegetation. It is one of the few buildings in San Diego that utilize recycled water in interior plumbing to supply the toilets. Perhaps most important is that the facility is used as a venue to educate the public on the advantages of sustainable design.
The goal for the San Elijo Visitor Center is to utilize the LEED PLATINUM certification to educate the public on environmentally friendly building design and present a “practice what we preach” public facility; demonstrating conservation of natural resources, use of recycled and environmentally friendly construction materials, reduced carbon footprint and water use. State of the art, museum quality, interactive exhibits and interpretive signage bring this message home to visitors. Exhibits also incorporate innovative view panels in the floors, walls and ceilings that provide visitors “windows” into the internal special features of the construction, normally hidden from the naked eye. The facility will serve to promote future sustainable design in the San Diego region.
As with any successful project, it was important to have a dynamic, dedicated team. Kudos to the County of San Diego, Zagrodnik + Thomas Architects, Riha Construction and the many consultants who worked on this project. This project has been recognized by the US Green Building Council, Sustainable Communities Program, San Diego Excellence in Energy Awards (SANDEE), Concrete Masonry Association and Green Building of America.
Here is a concerted effort to establish a comprehensive sustainable program that includes architectural design but also extends to the systems required for wastewater treatment – electricity generation, water recycling, and solid waste recycling.
Encina Wastewater Authority (EWA) provides wastewater treatment to 300,000+ San Diego County residents. Facilities include a 36 million gallon/day wastewater treatment plant, water recycling facility and pump stations. EWA has defined a comprehensive sustainable site philosophy for an energy efficient and environmentally responsive facility.
Recent steps in implementing this philosophy include enhancements to on-site electrical cogeneration system, a new solid waste treatment facility that creates fuel pellets on site which are used to provide energy at local concrete plants, and even experiments with Scripps Oceanography to develop media for raising algae that can be converted to bio-fuel.
Now, take a look at the new operations complex. Designed to last more than 100 years, the facility follows the owner’s sustainable philosophy for an energy efficient and environmentally responsive facility. The board of directors mandated LEED guidelines be followed, though certification was not pursued.
A study during design identified 38 potential qualifying credits. Elements incorporated include:
The West City Campus for Continuing Education is a new $18 million project that serves as the Campus of Excellence for Hospitality and Consumer Sciences, and is a model of smart construction and energy efficiency, reducing utility and maintenance costs substantially compared to a standard building. Sustainable design and construction can greatly reduce the amount of energy need to produce and transport materials, and to construct, operate and maintain a building. At West City, quality of life for the building users will be enhanced by better connections to the outside environment, and reduction of materials and systems contributing to indoor pollution. The use of sustainable materials or those with a high volume of recycled content is proving to have an aesthetic value as well, prompting users to learn more about these materials and see the benefits of including these materials in their learning and working environment.
Storm Water Management - The parking area is constructed with pervious concrete, which allows storm water to percolate through into the ground. Building roof drains are directed into landscaped detention basins, which also filter the water and absorb into the ground. This recharges the aquifer and greatly reduces run-off that may migrate into the Bay and San Diego River.
Heat Island Reduction – Light colored roofing, concrete paving, and canopy-type trees will reduce the heat absorbed and re-radiated by the West City building and site. Light Pollution Reduction – Fully shielded exterior lighting helps reduce nighttime glare, both for neighbors and on the nighttime sky. High-efficiency fixtures also reduce electrical consumption.
Water Efficient Landscaping – Trees and shrubs have been selected for their compatibility to the area, to provide shade and to minimize the need for water. A high-efficiency irrigation system utilizes a controller that adjusts itself to local weather.
Water Use Reduction – Restrooms are equipped with water-saving aerators, low-flow toilet valves and waterless urinals to reduce the need for water by 30% from a typically-constructed building.
Lighting and Ventilation – High-efficiency lighting and heating, ventilating and air conditioning systems are used to reduce the need for energy. Lighting controls automatically dim or shut off the lights when there is adequate daylight from outside. Economizers turn off the air conditioning and circulate filtered outside air when the outdoor temperature is comfortable. These features reduce the need for energy by 38% and are expected to save up to $40,000/year in operating costs over standard construction.
Building Materials – Building materials were selected to provide high performance and reduce environmental impact. High efficiency windows and skylights optimize views and daylighting while reducing heat transmission into or out of the building. Whenever possible, materials are from local manufacturers, have high recycled content, and have low off-gassing of volatiles. Materials that do not require waxing and refinishing were also selected to reduce maintenance and limit contaminants washed down the drains.
Construction Waste Management – Recycling and salvaging programs during construction diverted a minimum of 75% of the waste from our landfills.
The project is expected to meet eligibility requirements for a Silver LEED certification, requiring a very high level of design, construction and performance. The incorporation of sustainable materials throughout the facility serve to inform and enhance appreciation and understand of green building practices in regard to environmental health, water savings, energy efficiency, quality of the indoor environment, and innovative use of sustainable and recycled materials.
The facility serves as model project for sustainability and is a working, living laboratory for mitigation issues that continue to inform and inspire local architects, engineers and contractors. The West City project involved some direct environmental benefits including the substantial reduction in emissions associated with the very low site energy use. By reducing regulated electrical use by approximately 47%, the building’s associated reduction in CO2 emissions is estimated at 16 tons per year. The peak electrical demand is reduced by approximately 40%, which helps to alleviate pressure on existing production and distribution systems.
Also, 50% of the remaining annual electrical use for the building will be offset for two years by a Green Tags contract, which will ensure that renewable energy is generated in an amount equal to the remaining estimated annual regulated grid electrical use. This strategy is also replicable. In addition to these primary environmental benefits that are due to integrated design and a commitment to energy and resource efficiency, there are substantial related secondary environmental and related community benefits associated with the West City Center project.
Heat Island Effect is a phenomenon found in most of our cities. It is caused by the re-radiation of absorbed light and associated heat in dark man-made materials such as roofing and asphalt paving. To combat this effect, the building utilizes a cool roofing membrane, which reflects rather than absorbs the heat. This also keeps the building cooler and reduces cooling requirements. The driveways and parking lot use permeable concrete paving and wide canopy type trees that will also prevent daytime heat absorption. Water use has been reduced by over 40% through the use of low-flow lavatories, waterless urinals, low-flow water closets, and low-flow kitchen sinks. This reduction in demand also reduces the amount of energy that is required to move water into the region. The project takes advantage of the ability of the soil to percolate water. Storm water runoff has been minimized by the use of onsite detention basins and pervious concrete pavement. This benefits everyone by greatly reducing the storm water runoff that often contaminates our oceans and bays. This project also lessens the burden on the municipal drain system.
Indoor Environment: The quality of the indoor work environment can play a significant part in the support of the educational mission of this Continuing Education campus. This project addresses the indoor environment in several ways. The generous use of windows and controllable skylights reinforces a connection to the outside environment and reduces the need for artificial lighting. Economizers allow the heating, ventilating and cooling system to take advantage of non-conditioned outside air to ventilate the building. This ensures that occupants have adequate amounts of fresh air without unnecessarily increasing building cooling loads. The system also automatically monitors Carbon Dioxide (CO2) levels and alerts occupants if they exceed recommended standards. Low-emitting materials are used throughout the project: all adhesives, sealants, paints, and carpeting are low-VOC.
Resources: Recycling is encouraged and facilitated by conveniently locating collection and storage facilities on-site, both indoors and outdoors. Additionally, by grinding the foundations and parking lots, construction waste was carefully recycled or reused on-site and reduced the burden on local landfills by 75% over standard construction. Ozone emitting coolants such as CFC’s, HCFC’s, or Halons, all of which deplete the ozone layer, were not used in the project.