CA: Bay-Friendly Landscapes Case Studies - Ohlone College Newark Center for Health Sciences

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Bay-Friendly Landscapes Case Studies - Ohlone College Newark Center for Health Sciences

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CA: Bay-Friendly Landscapes Case Studies - Ohlone College Newark Center for Health Sciences

  1. 1. A Bay-Friendly Rated Landscape: A Case Study OHLONE COLLEGE NEWARK CENTER FOR HEALTH SCIENCES & TECHNOLOGYBay-Friendly Rated Campus Teaches Environmental Stewardship T he San Francisco Bay Area’s newest community college campus FAST FACTS COST $117.5 million (total project cost including has been receiving a steady land acquisition, buildings, landscaping, roads, parking, stream of accolades for its furnishings, equipment) leadership in sustainable LOCATION 39399 Cherry Street landscaping and green Newark, California building practices. Ohlone PARCEL SIZE College Newark Center 81 acres BUILDING SIZE for Health Sciences and 135,000 sq. ft.Technology is the largest landscape to date—and the first college campus—to be LANDSCAPE SIZEdesignated a Bay-Friendly Rated Landscape. 31 acres BUILDING TYPEIt is also the first college campus in the world to achieve Platinum certification, the Community college campushighest level of recognition offered by the LEED green building rating system. The COMPLETION DATE January 2008Newark Center’s grounds, which include native plants and a stormwater management OWNER/DEVELOPERsystem that functions as a seasonal wetland preserve, contributed to the school’s top Ohlone Community College District, Fremont, CaliforniaLEED rating. LANDSCAPE ARCHITECT Conger Moss GuillardThe grounds were designed to teach environmental stewardship through responsible, San Francisco, Californiasustainable practices, including soil and watershed conservation, the use of native and LANDSCAPE CONSTRUCTIONclimate-appropriate plant species and creation of wildlife habitat. StopWaste.Org CONTRACTOR ValleyCrest Landscape provided a $110,000 grant to fund some of the Bay-Friendly Development Pleasanton, California Landscape and green building features. BUILDING ARCHITECT The Bay-Friendly Rating was an outgrowth of the College’s Perkins+Will San Francisco, California determination to “create a healthy and innovative learning GENERAL CONTRACTOR space for students,” said Leta Stagnaro, the Newark Center’s Turner Construction San Jose, California associate vice president. And with the campus located close CONTACT FOR MORE INFO to the San Francisco Bay, “Ohlone wanted to make sure we Leta Stagnaro did our part as a college and as a community leader” to be a Ohlone College Newark Center TEL 510-742-2301 responsible steward of the watershed, she said. J a n u a r y , 2 010 1
  2. 2. The first phase of the Newark Center, which opened in January 2008,consists of a 135,000-square-foot building on an 81-acre site. Built to B AY-FRIENDLYaccommodate 3,500 students, the Center offers general education as well AT A GLANCEas vocational programs including biotechnology, nursing, physical therapistassistant, respiratory therapy and a new environmental studies program. Bay-Friendly Rated Landscape score:Landscape architects Conger Moss Guillard designed the grounds andparticipated in the master planning process for the campus. Although H 83 Hdesigned to accommodate future expansion, the landscape feels completetoday, with sunny and sheltered seating areas, shade trees and a gently LANDSCAPE LOCALLYsloping amphitheater. Walkways lead from formal lawns through areas of • Site analysis completed tonative sedges and grasslands and alongside a newly constructed seasonal maximize benefits of Bay-Friendly Landscape practiceswetland that cleanses stormwater runoff before it flows into the Bay. • Soil analysis provided recommendations for organic soilHaving learned so much about Bay-Friendly Landscaping at the Newark amendments and fertilizersCenter, the College will be looking at ways to introduce these practices to LANDSCAPE FOR LESS TO THEtheir much larger Fremont campus, said Stagnaro. LANDFILL • Plant species installed will notB require shearing and will grow to mature size within space allotted; AY- F R I E N D LY L A N D S C A P I N G P R AC T I C E S overplanting was avoided • No invasive species were planted • Soil surface under tree and shrubProtect Water Quality: Contributing to a canopies will be used as repository for fallen leavesHealthier San Francisco Estuary • Onsite composting uses plantThe Newark Center’s Bay-Friendly landscape has been designed to help debris from the landscapeimprove the health and function of the San Francisco Estuary, the largest and serves as an educational opportunityestuary in western North America. This extraordinary resource encompasses • 100% of compost and mulch usedthe San Francisco Bay and Delta and a range of tidal flats, marshes, lagoons, was produced from urban plantsalt ponds and grasslands. waste • 91% (957 tons) of constructionThe campus is near the southeastern periphery of the Bay, in a transitional and demolition debris was diverted from landfillsarea between urban development and the Estuary’s wetlands. Those wetlands • Plant debris is taken to a facilityhelp recharge groundwater supplies, reduce the destructiveness of floods, that produces compost and mulchand absorb and filter pollutants. Over the past 200 years, however, human NURTURE THE SOIL • Soil was not worked when wet • A stormwater pollution prevention plan was prepared for the site • Valuable trees, shrubs and sensitive habitat were protected with fencing during construction • Compacted soil was aerated prior to planting in all landscaped areas • Long-term maintenance for turf includes topdressing with finely screened quality compost after aeration • Compost was used to amend soil32 J a n u a r y , 2 010
  3. 3. B AY-FRIENDLY AT A GLANCECONSERVE WATER PROTECT WATER & AIR• All soil is protected with QUALITY 2-inch layer of recycled • 20% of installed plants mulch are listed by Cornflower• 1 inch of compost was Farms as attracting tilled into all planting beneficial insects areas • Integrated pest• Over 75% of all plants management (IPM) are California native or will be used during Mediterranean species maintenance that require little or no • Maintenance practices summer water require that oil leaks be• Sod is a water- repaired immediately activities have resulted in the loss of more than 90 conserving dwarf tall and off site fescue percent of the original wetlands in the Estuary, severely • 100% of average annual• No more than 10% of runoff is treated in impairing their ability to provide vital ecological total landscape area is bioswales, stormwater functions. turf garden and detention• High efficiency irrigation basin/seasonal wetland The campus’s 81-acre site is nearly flat, with tight clay system includes • At least one member soils that impede the downward movement of water. If a smart irrigation of staff is a Bay-Friendly controller; irrigation Qualified Landscape there were no system in place to manage stormwater system reduces potable Professional runoff, some of the rain falling on the site would carry water consumption by 55.6% compared to CREATE WILDLIFE sediment, road oil and other pollutants into nearby conventional irrigation HABITAT Mowry Slough, ultimately reaching the salt ponds and• Dedicated landscape tidal flats fringing the Bay. • More than 30 distinct water meter was species were planted to installed; water use is “We had the opportunity to do the site planning from increase biodiversity reported according to regular schedule • 955,927 s.f. of the site the outset and think about how to move stormwater area (roughly 56% of the• Maintenance non-building area) has across the site sustainably,” said Chris Guillard, a specifications require been planted with native principal with Conger Moss Guillard. Instead of “hard- checking soil moisture or climate-adaptive content with soil piping” runoff to a discharge point, the team designed a species probes before watering, low impact system that directs runoff from impervious adjusting the watering • A mosquito abatement schedule based on plan was developed for surfaces such as roofs, parking lots and walkways into a weather conditions and the bioretention areas series of onsite bioretention areas. immediately replacing BE INNOVATIVE broken irrigation Runoff from the site hardscape drains to landscaped equipment • A Bay-Friendly maintenance manual was areas, where the soil naturally filters suspended solidsCONSERVE ENERGY developed as a basis for and removes much of the dissolved organics and• Deciduous trees shade training maintenance contractors phosphorous; area drains then collect the treated runoff. some of west-facing building walls and • Educational signage was Meanwhile, runoff from the roof, which is relatively windows installed to describe the free of pollutants, is directed from downspouts to area• Full cut-off exterior light property’s Bay-Friendly fixtures reduce light Landscape features drains. The runoff from both the landscaped areas and pollution the roof is then piped underground to a large depression• Site lighting does dubbed the “stormwater garden” that is planted with not cast direct beam illumination onto native grasses and other vegetation. As the water adjacent properties percolates into the stormwater garden’s soil, it is further filtered and cleansed. J a n u a r y , 2 010 2 3
  4. 4. A three-level treatment system, including bioswales, two hydrodynamic separators, and two sedimentation ponds, cleanse the runoff before it spills into the constructed wetland. Designed to be a visible part of the landscape, the stormwater management system serves as a teaching tool for students and visitors. Students in the Environmental Studies department study the native and exotic plants in the bioretention areas, collect bugs and leaves, and test the water, said Stagnaro. Detailed interpretive signs in front of the stormwater garden promote awareness about how the campus’s Bay-Friendly features are contributing to a healthier Estuary. Create Wildlife Habitat: Establishing Native Grasslands Areas of the Newark Center’s landscape that are designed for fairly intensive use, such as the amphitheater, have been planted with a tall fescue grass that requires less water than conventional turf grass. In other areas, the lawns give way to wilder zones that take their cue from the native grasslands that once edged the Bay.From the stormwater garden, runoff is then conveyed “The design attempted to acknowledge the relationshipthrough a bioswale to a constructed seasonal wetland, a with the Bay and with the indigenous Californialarge detention basin designed to detain water for at least landscape to try to bring areas where there would be24 hours. This fully planted basin provides additional some habitat creation right into campus,” said Guillard.biological filtration, further reducing dissolved toxins andchemicals such as nitrogen and phosphorous that havethe potential to cause eutrophication in local streamsand the Bay. The cleansed runoff then flows into anotherchannel that directs it to the slough and ultimately theBay.The sequence of stormwater management elements“creates this linear link to the horizon and to the Bay,”said Guillard. “Those areas were seeded with nativeplants and wetland species to start the process ofhabitat creation,” including many species “common to Some of these areas have been planted with Carex pansa,transitional grasslands that would have been on the site a native sedge that needs relatively little irrigation andhistorically,” he said. no mowing. Other areas have been seeded with cool- season native grasses and forbs that grow through theAlong the periphery of the campus, a separate storm winter and early spring and then go dormant duringdrainage system was installed to handle the potentially the dry season. The sedges and grasses provide wildlifehigher levels of suspended solids and toxins in runoff habitat and create a transition between the more formalfrom the parking lots, landscape islands and drive aisles.54 J a n u a r y , 2 010
  5. 5. landscaping close to the building and the wetlandpreserve and open space in the outlying areas of the site. The Newark Center’sThe native grasses initially established reasonably well,Guillard said, but because weed abatement strategies LEED Platinum Buildingwere not used prior to construction, over time weeds Achieving the Platinum level of LEED certificationhave become a problem in some areas. Also, budget required Ohlone College to make an extraordinaryshortfalls have made it difficult to devote landscape commitment to sustainable design and constructionmaintenance time to weed control, said Manmohan practices. The building has an innovative heating,Gill, the College’s building and grounds supervisor. The ventilation and air conditioning system designed toCollege is currently evaluating options for the grasslands, use less energy than conventional HVAC systems.such as overseeding them with nonnative annual grasses A geothermal system heats and cools the building,that can outcompete the undesirable broadleaf weeds. circulating water through 26 miles of closed-loopTo guide ongoing landscape maintenance practices at pipes buried 12 feet under the landscaping. Thethe site, the College developed a landscape maintenance water absorbs heat from the earth to warm the airmanual based on Bay-Friendly techniques, said Gill, in the building on cool days, and it rejects heat towho is a Bay-Friendly Qualified Landscape Professional. the earth to cool the building on warm days.Landscape waste is currently collected and composted at Two enthalpy wheels (also known as heat wheels ora nearby site, he said, and onsite composting will become rotary air-to-air heat exchangers) further reduce thestandard practice after completion of a student project amount of energy required for heating and coolingto build a three-bin composting system large enough to by transferring energy between the HVAC system’shandle a truckload of material. outgoing air and incoming air. This energy recovery system allows significant amounts of fresh air to be introduced into the building without expending extra energy to heat or cool it. More fresh air results in better indoor air quality and a healthier environment for the students, staff and faculty. The enthalpy wheels can be seen through a glass window inside the building, allowing them to serve as a teaching tool. A 480 kilowatt solar electric system covering 38,000 square feet of the building’s roof meets roughly 40 percent of the building’s electrical demand. Other green building features include abundant interior daylight, high efficiency lighting, high performance windows, water-conserving fixtures, low VOC interior paint, Forest Stewardship Council–certified wood in the elevator lobbies, recycled cotton insulation, recycled-content carpet tiles, and furniture designed for easy disassembly and recycling. A remarkable 91.8 percent (957 tons) of the waste generated onsite during construction was diverted from landfills. J a n u a r y , 2 010 4 5
  6. 6. 1537 Webster Street, Oakland, CA 94612Ask about our FREE resources: This case study was written by StopWaste.Org as part of its Bay-Friendly Landscaping program. ForAvailable online at www.Bay-Friendly.Org: information about waste reduction, recycling and • Bay-Friendly Civic & Commercial Landscape Scorecard sustainable landscaping, visit www.BayFriendly.org • Bay-Friendly Landscape Guidelines: Sustainable Practices for the Landscape Professional About the Agency • A Bay-Friendly Landscaping Guide to Mulch: Save The Alameda County Waste Management Authority & Money, Control Weeds, and Create Healthy Landscapes the Alameda County Source Reduction and Recycling (Available in English and Spanish) Board is an integrated public agency whose mission • A Bay-Friendly Landscaping Guide to Grasscycling: Save is to provide the most environmentally sound waste Time, Save Money and Create Beautiful Lawns (Available management program for the people of Alameda County. in English and Spanish) The authority and the Recycling Board produced this • A Bay-Friendly Landscaping Guide to Recycled-Content case study to aid developers in creating and building and Salvaged Materials: Add Value, Reduce Greenhouse sustainable landscapes Gas Emissions and Create Attractive Landscapes • Fact Sheet on Recycled Content Park & Recreation Products in Alameda County • Bay-Friendly Model Landscape Maintenance SpecificationsAlso check our website for information on the Bay-Friendly Landscape Professional Qualification andTraining for both landscape design and maintenanceprofessionals at www.bayfriendly.org/bf-qualified. W W W. B AY- F R I E N D LY. O R G6 J a n u a r y , 2 010

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