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ACTION

BOARD OF EDUCATION OF HOWARD COUNTYMEETING AGENDA ITEM

TITLE: Stevens Forest Elementary School DATE: September 22, 2011Construction Document Brochure

PRESENTER(S): Bruce Gist, Director, School ConstructionDan Bailey, President, Penza Bailey Architects

OVERVIEW:The attached construction document brochure describes the renovations and additions to Stevens Forest Elementary School. Stevens Forest Elementary School, originally opened in 1972, will have a complete renovation of the facility including installation of a sprinkler system, new lighting and electrical systems, new mechanical systems, plumbing upgrades, full handicap accessibility, a new roof, and the relocation of interior walls where necessary. A construction phasing plan has been developed to minimize disruption to the school. The project will be constructed while the school is being occupied by relocating students inside the building and using existing relocatable classrooms on site. The add-alternate includes a 100-seat classroom addition.

Since the design development presentation, several refinements have been made including the addition of 25 parking spaces (add-alternate), quartz tile flooring (add-alternate), providing adesignated parent volunteer room, and the use of multi-fount sinks outside of toilet rooms.

This project will utilize the United States Green Building Council Leadership in Energy and Environmental Design (LEED) for Schools version 2009. The design intent is to achieve a LEED Certified designation. Construction award is currently scheduled for April 2012.

RECOMMENDATION/FUTURE DIRECTION:It is recommended that the construction document brochure for Stevens Forest Elementary School be approved as submitted.

Submitted by:

Approval/Concurrence:

Ken Roey, Executive Director,Facilities Planning and Mgmt.

Raymond H. BrownChief Operating Officer

Bruce GistDirector, School Construction

Stevens Forest Elementary School – Construction Document Brochure Penza Bailey Architects, Inc. 1 �

Construction Document Brochure

Additions and Renovations to

Stevens Forest Elementary School HOWARD COUNTY PUBLIC SCHOOL SYSTEM

September 22, 2011

Penza Bailey Architects

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Construction Document Brochure September 22, 2011 Additions and Renovations to

Stevens Forest Elementary School FOR THE BOARD OF EDUCATION: Chairman Janet Siddiqui, M.D. Vice Chairman Sandra H. French Members Frank J. Aquino, Esq.

Allen Dyer, Esq. Ellen Flynn Giles Brian J. Meshkin Cynthia L. Vaillancourt Student Member Tomi Williams Superintendent Sydney L. Cousin Deputy Superintendent Mamie Perkins Chief Operating Officer Raymond H. Brown Executive Director Facilities Planning and Management Ken Roey Director School Construction Bruce Gist


Table of Contents

Schematic Design Planning Advisory Committee Members 4

Design Development Phase Participants 5

Continuation of the School Design Process 6

Project Description and Project Data 7

Project Schedule 8

Sustainable Design Considerations 9

Vicinity Map 10

Proposed Construction Document Site Plan Narrative 11

Proposed Construction Document Site Plan 12

Existing Facility Description 13

Existing Floor Plan 14

Proposed Construction Document Narrative 15

Proposed Construction Document Floor Plan 17

Proposed Construction Exterior Elevations Narrative 18

Proposed Construction Document Exterior Elevations 19

Proposed Construction Document Building Sections 20

Proposed Space Analysis 21

Proposed Construction Document Mechanical Narrative 24

Proposed Construction Document Electrical Narrative 27

Construction Document Cost Estimate 30


Planning Advisory Committee Members William Arbelaez Stevens Forest Elementary School, Media Specialist Jennifer Adkins Stevens Forest Elementary School, PTA President Ruth Barth Stevens Forest Elementary School, Teacher Cathleen Conley Young HCPSS, Architect/Engineer, School Construction Wayne Crosby HCPSS, Building Services, Interim Director, School Facilities Yvette Custis Stevens Forest Elementary School, Teacher Marie DeAngelis HCPSS, Director, Elementary Curricular Programs Grace Derenberger Stevens Forest Elementary School, Teacher Frederick Elland Stevens Forest Elementary School, Parent Bruce Gist HCPSS, Director, School Construction Dan Keiser HCPSS, Construction Program Manager, School Construction Sharon Lewandowski Stevens Forest Elementary School, Assistant Principal Gloria Mikolajczyk MSDE, School Facilities Architect Supervisor Marion Miller HCPSS, Administrative Director Elementary Leticia Morman Stevens Forest Elementary School, Teacher Ron Morris Stevens Forest Elementary School, Principal Terri Savage HCPSS, Instructional Facilitator, Elementary Schools Mike Skrodinsky HCPSS, Construction Project Manager Andrea Sexton Stevens Forest Elementary School, Parent Brian Smith Stevens Forest Elementary School, Teacher Caroline Walker HCPSS, Coordinator, Academic Intervention/Title I Scott Washington HCPSS, Manager of Design and Preconstruction Services Ken Roey HCPSS, Executive Director, Facilities Planning & Management Architects Dan Bailey, AIA President, Penza Bailey Architects, Inc. Tara Labosky, AIA Project Manager, Penza Bailey Architects, Inc. Design Team Architect: Penza Bailey Architects, Inc. Civil Engineer: Fisher, Collins & Carter, Inc. Structural Engineer: Columbia Engineering, Inc. Mechanical/Electrical Engineer: James Posey Associates, Inc. Acoustical Engineer: Acoustical Design Collaborative, Ltd LEED Consultant: TerraLogos Eco Architecture, PC Construction Manager: Lewis Contractors

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Design Development Phase Participants Lisa Simmons Stevens Forest Elementary School, Special Education Team Leader Kim Dillard Stevens Forest Elementary School, Primary Teacher Sharon McGuire-Smith Stevens Forest Elementary School, Behavior Intervention Renee Cornelius Stevens Forest Elementary School, Guidance Jeff Dombek Stevens Forest Elementary School, Art Barry Palmer Stevens Forest Elementary School, Physical Education Teacher Amanda McKay Stevens Forest Elementary School, Strings Teacher Joan Tellish Stevens Forest Elementary School, Math Resource Brenda Gregor Stevens Forest Elementary School, Cluster Nurse Trulanda Ginyard Stevens Forest Elementary School, Health Assistant Susan Sitek Stevens Forest Elementary School, Reading Support Teacher Amy Gooding Stevens Forest Elementary School, Reading Specialist Toni Sommerville Stevens Forest Elementary School, Reading Recovery Teacher Ruth Barth Stevens Forest Elementary School, Title I/Focus Teacher Bridget Darden Stevens Forest Elementary School, Grade 3 Teacher Melanie Tomanek Stevens Forest Elementary School, Grade 4 Paraeducator Laila Farhadi Stevens Forest Elementary School, Grade 5 Teacher William Arbelaez Stevens Forest Elementary School, Media Specialist Allen Johnson Stevens Forest Elementary School, Custodian Brian Smith Stevens Forest Elementary School, Technology Education Alfreda Walker Stevens Forest Elementary School, ELL Teacher Tom Stabile Stevens Forest Elementary School, Vocal Music Teacher Ron Morris Stevens Forest Elementary School, Principal Sharon Lewandowski Stevens Forest Elementary School, Assistant Principal Cathy Papathakis Stevens Forest Elementary School, Administrative Secretary Kimberly Hughes Stevens Forest Elementary School, Kindergarten Team Leader Lindsay Derenberger Stevens Forest Elementary School, Kindergarten Teacher Rachel Kastner Stevens Forest Elementary School, G/T Resource Teacher Juliette Wilson Stevens Forest Elementary School, G/T Resource Teacher Yvette Custis Stevens Forest Elementary School, Grade 2 Team Leader Judy Gottsagen Stevens Forest Elementary School, Grade 1 Teacher Grace Derenberger Stevens Forest Elementary School, Grade 1 Teacher Peggy Buckler Stevens Forest Elementary School, Grade 1 Paraeducator Scott Washington HCPSS, Manager of Design and Preconstruction Services Bruce Gist HCPSS, Director, School Construction Mike Skrodinsky HCPSS, Construction Project Manager Dan Keiser HCPSS, Construction Program Manager Design Team Dan Bailey President, Penza Bailey Architects, Inc. Tara Labosky Project Manager, Penza Bailey Architects, Inc. Chuck Crovo Civil Engineer, Fisher Collins & Carter, Inc. Neil Thompson Shade Acoustical Engineer, Acoustical Design Collaborative Steve Hudson Principal, James Posey Associates James Graf Electrical Engineer, James Posey Associates Joe Gauthier Mechanical Engineer, James Posey Associates Maureen Bands Project Manager, Lewis Contractors Brian Serp Project Manager, Lutz Engineering Randy Haist Structural Engineer, Columbia Engineering, Inc. Cheryl Zaron Structural Engineer, Columbia Engineering, Inc. Kim Schaefer Principal, TerraLogos Eco Architecture, PC Mark Sullivan Project Manager, TerraLogos Eco Architecture, PC Mike Steinfelt TerraLogos Eco Architecture, PC


Continuation of the School Design Process This Construction Document Brochure explains the aspects of the additions and renovations to Stevens Forest Elementary School that have changed since the Design Development Concept Brochure. Included are updates to the project including revisions to areas and exterior elevations. The planning process for Stevens Forest Elementary School, the factors that influenced design decisions and the organization of the facility, were described in detail in the Schematic Design Concept Brochure submitted to the Board of Education and approved on December 6, 2010. Following approval of the schematic design, a formal schematic design submission was sent to the Maryland State Department of Education (MSDE) and later approved for the continuation of the design process. The design development phase involved plan refinements, minor program space revisions, and integration of mechanical, electrical and structural design. However, the overall design concept remained relatively unchanged. The planning process for Stevens Forest Elementary School, the factors that influenced design decisions and the organization of the facility were described in detail in the Design Development Concept Brochure submitted to the Board of Education and approved on April 28, 2011. Following approval of the design development brochure, a formal design development submission was sent to the MSDE and later approved for the continuation of the design process. During the construction document phase, the drawings progressed to a format suitable for construction. This involved further coordination of structural, mechanical, plumbing, and electrical systems with walls and ceilings, fine tuning of construction phasing and egress plans, finish selection, interior details, and further examination of building envelope design. Several meetings were conducted during this phase including bi-weekly progress and facilities department meetings with representatives of the Howard County Public School System (HCPSS), the design team, and construction manager in attendance. Issues such as constructability, hardware, electrical, IT and program requirements were reviewed and coordinated. A meeting with Principal Ron Morris was also conducted as a follow up to the quarter scale meetings and to discuss outstanding issues. In addition, Penza Bailey met with the Howard County Fire Marshal to review the egress plans for the multiple construction phases. The civil drawings were submitted to Howard County for the grading permit application on August 17, 2011. Project Description updates noted on page 7 Project Data updates noted on page 7 Project Schedule updates noted on page 8 Sustainable Design Considerations updates noted on page 9 Construction Document site plan refinements are noted on page 11 Construction Document floor plan refinements are noted on page 15 Program Space Analysis updates noted on page 21 Cost Estimate updates noted on page 30

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Project Description The general scope of work for Stevens Forest Elementary School includes programmatic, systemic, and physical upgrades. The main programmatic task involves designing a new plan that provides individual classrooms and corridors within the existing pod footprint and structural bearing walls. Additional programmatic changes will include expanding the existing health suite to meet MSDE design guidelines, providing adequate space for specialized and adjunct classrooms and support areas, and relocating all of the existing portable program space into the building. Systemic upgrades include complete replacement of the mechanical system, new plumbing fixtures, upgraded electrical service, and new lighting. An emphasis on energy efficient systems and fixtures will be incorporated into the design. Physical upgrades include a roof replacement, new doors and hardware, additional exterior windows, new casework, and new finishes. Three additions are also anticipated and include a vestibule and canopy at the west main entrance, and enlarged mechanical and electrical rooms with adjacent vestibule at the south. Classroom and storage space will be included in the third addition located at the north side of the building. An add-alternate addition is also proposed at the north end and will include four additional classrooms, extended learning rooms, and storage. A better learning and teaching environment will be the focus of many of the physical upgrades. During the construction document phase, a site add-alternate was added to the project in order to provide additional parking at the school. Project Data Existing Building Gross Area 44,440 sf West Vestibule Addition 243 sf South Mechanical, Electrical and Vestibule Addition 913 sf North Classroom and infill addition 5,572 sf North Classroom and infill addition Add-alternate 5,313 sf Total Gross Area 56,481 sf* * 51,168 sf without Add-Alternate

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Project Schedule Schematic Design

Presentation to the Board of Education for Review and Approval December 6, 2010

Submission to the State MSDE/IAC December 8, 2010

Design Development Presentation to the Board of Education for Review and Approval April 28, 2011

Submission to the State MSDE/IAC May 2, 2011

Construction Documents

Presentation to the Board of Education for Review and Approval September 22, 2011

Submission to the State MSDE/IAC September 23, 2011

Permit Submission September 23, 2011

Bidding

Bid Preparation and Advertisement January 16, 2012

Bid Opening February 15, 2012

Bidding / Construction Contract & Approvals April 12, 2012

Construction

Construction Start June 16, 2012

Construction Completion (18 months) December 31, 2013

Note: Construction schedule is contingent on receiving appropriate funding in April 2012. We are continuing to review schedule in order to expedite completion due to late start.

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Sustainable Design Considerations Preliminary discussions with the design team, estimator, and the HCPSS Building Services have determined that the project will be able to obtain a Leadership in Energy and Environmental Design (LEED) Certified rating with the possibility of a LEED Silver rating per LEED for Schools (2009). Below is a partial list of main design intent and overall scorecard listing design credits that will be submitted.

• Sustainable Sites: Heat Island Effect - Roof. The replacement roofing membrane will be specified to meet the Solar Reflectance Index (SRI) equal or greater than 78 for a minimum of 75 percent of the roof surface.

• Water Efficiency: A minimum of 30 percent water use reduction will be achieved by the selection of water efficient new and replacement plumbing fixtures throughout the building.

• Energy and Atmosphere: Fundamental and Enhanced Commissioning. The replacement HVAC system will be designed for maximum energy efficiency, and commissioning will ensure that the system is properly installed, functions as specified, and meets the owner’s expectations.

• Materials and Resources: Certified Wood. Selection of fixtures to be installed in the school such as doors and casework will be based on certification with the Forest Stewardship Council’s (FSC) Principles and Criteria. FSC certification ensures that the raw material comes from forests that are managed in an environmentally responsible fashion.

• Materials and Resources: Construction Waste Management. Recycling is feasible for many of the building elements to be removed such as ceiling tiles, ductwork, light fixtures, and ceiling grids. A minimum of 50 percent of demolished materials will be recycled and diverted from a landfill.

• Materials and Resources: Building Reuse – 75 percent. With the exception of new windows, the existing exterior skin will remain in place as will a majority of the roof structure, floor structure, and interior bearing walls and columns.

Stevens Forest LEED Scorecard

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VICINITY MAP Stevens Forest Elementary School is located on Stevens Forest Road near the intersection of Kilimanjaro Road. The school is within Oakland Mills Village in Columbia, Maryland.

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Proposed Construction Document Site Plan Narrative Key features noted on the proposed site plan are identified by numbers in yellow circles.

1. North Addition: An addition at the north end of the building was included in order to provide adequate classroom and storage space and eliminate the use of portable classrooms.

2. North Addition: Add-Alternate - If funding is available, a 100-seat addition (four classrooms) will

be constructed to allow for additional students in the event of redistricting. In addition to classroom space, storage rooms and extended learning areas are provided.

3. West Addition: In order to provide additional security at the main entrance, a vestibule was

designed to move visitors first into the reception area to check in with the staff. The vestibule will also provide an air-lock during bad weather.

4. South Addition: New mechanical and electrical systems and upgrades made additional space

necessary. The best solution was to provide an addition adjacent to the existing mechanical/electrical room to accommodate the equipment.

5. The proposed mechanical system will be a hybrid geothermal system that requires a large well field.

6. A new concrete sidewalk was designed at the west and north sides of the building, and connects

to the entrance and east sidewalk, to provide a continuous walk around the perimeter of the building.

7. A bio retention pond was located at the north of the building and will serve the roof drains at the

north addition per storm water management requirements.

8. The paved area near the building entrance will be repurposed as a bike storage area. In addition, a marked bike lane will be provided at the north drive and a new paved bike lane will be constructed along the south drive. These improvements will not only satisfy a LEED credit requirement, but also provide dedicated bike lanes on the property for both students and staff.

9. Due to the poor condition of the existing sewer line from the building entrance to Stevens Forest

Road, a new sewer line will be constructed at the north end of the north drive, and the existing line will be abandoned.

Construction Document Site Plan Refinements Key features noted on the proposed floor plan are identified by letters in yellow hexagons.

A. As existing on-site parking is inadequate, an add-alternate is proposed that will provide an

additional 25 spaces in the area that is currently the paved play area. The new location for the basketball and various activity courts will be along the east side of the school.

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Existing Facility Description The existing facility was originally constructed in 1972 with a gym addition and partial systemic renovation in 1995. The renovations, additions, and modifications are listed below:

• 1972 - Original structure built. Design based on a classroom pod/open floor plan. • 1995 - Gymnasium, toilet room, and storage addition at the southeast corner; space reconfiguration

and renovation at art room and music room; partial height partitions at some open teaching areas; and mechanical and electrical replacement throughout entire building, including structural upgrades for new rooftop mechanical equipment.

Existing Floor Plan Existing Footprint: The school was originally designed using the pod and open plan concepts with five pod areas for core classrooms. Interior and exterior structural bearing walls and columns were designed around the pod plan layout. Original Program: The original 1972 school program was comprised of 18 teaching areas in four pods, two kindergarten teaching areas in one pod, administrative suite, health suite, kitchen, cafeteria, music room, open media center, and storage rooms, with work/seminar and team rooms distributed throughout the building. Current Program: The current program has expanded and transformed from the original and now includes 15 teaching stations (including three kindergartens), media technology resources, computer lab, science area, art room, expanded special education, alternative education, reading resource, regional program – students with emotional disturbance (SED), English for Speakers of Other Languages (ESOL), family and Hispanic liaisons, and guidance. Four portable classrooms are located to the north of the school and house the Title I classroom and office, a second music classroom, and the gifted/talented program.

1. Administration: Currently located near the front entrance, the administration area has an undersized health suite, lacks a direct view to the parking lot and does not allow for secure access into the building.

2. Grades 1-5: Classrooms are arranged in a pod configuration and lack walls, built in storage and natural light.

3. Fine Arts: The art room is adequate, but one of the music rooms is located in a portable unit with instrument storage along a corridor.

4. Kindergarten: The two original kindergarten spaces are poorly configured and require students and staff to pass through one class to get to the second. Current enrollment requires a third kindergarten space and it is located remotely from the other two classrooms.

5. Building Services: Two of the existing gang toilet rooms do not meet the Americans with Disabilities Act (ADA) accessibility standards. The mechanical and electrical room is undersized and contains overflow custodian storage.

6. Special Education: The regional program is not a self-contained suite and space for alternative education is inadequate.

7. Central Support: Many of the support spaces such as reading resource, ESOL, and math resource are undersized and lack storage space. The media center is open to the corridor and does not allow for a quiet learning space. The cafetorium stage is not wheelchair accessible.

8. Circulation: As the school was originally configured as a pod plan, in many cases it is necessary to pass through one classroom to get to another.


Proposed Construction Document Narrative Key features noted on the proposed floor plan are identified by numbers in yellow circles. Existing Footprint: The goal of the design team was to work within the existing interior structural bearing walls and columns in order to keep costs of reconfiguring the structure to a minimum. As the pod plan layout was not conducive to a double-loaded corridor, a portion of the existing north/south corridors were extended at an angle to the north in order to divide the space as efficiently as possible. Proposed Program: All existing program requirements were maintained and in some instances, expanded to accommodate the school needs and space requirements per the HCPSS Guidelines Manual for Renovations and Modernizations at Existing Schools, the 2010 HCPSS General Elementary Educational Specifications for New Schools, and as in the case of the health suite, a 100 percent increase in area in order to meet the MSDE design standards. All spaces currently located in portables have been included in the main building, thus eliminating the need for portables. The existing 15 teaching stations (including kindergarten) will remain and the add-alternate will provide an additional 100 seats, or four classrooms.

1. Administrative: The main office was relocated to the southwest corner of the building in order to provide a better view of the parking lot and front drive of the school. A vestibule addition is proposed at the front door to allow for better security in that visitors will be required to enter the reception area prior to entering the remainder of the building. The teacher lounge was relocated to the north of the building and the health suite was enlarged to meet the MSDE design guidelines and allow for ADA clearances and fixtures in the toilet room.

2. Grades 1-5: All attempts were made to locate the core classrooms along the perimeter of the

building to allow for windows and natural light in the teaching areas. Tubular daylighting devices will provide indirect natural light for the interior classrooms. Each grade has a support area open to the corridor that provides desk space for paraeducators, easy access to storage, wet areas (in existing building only) and close proximity to the extended learning rooms.

3. Fine Arts: The second music room was relocated from a portable to a space adjacent to the

existing music room. The rooms are connected by a dedicated storage room and are close to the cafetorium stage. The art room remains relativity unchanged.

4. Kindergarten: Kindergarten rooms were relocated to the area north of the main entrance and

have immediate access to individual toilets, wet area, and storage. The number of kindergarten classes fluctuate between two and three classes per year.

5. Building Services: With the exception of the toilet rooms adjacent to the gym, the existing student

toilet rooms were reconfigured in order to comply with all ADA clearances and fixture requirements. Additional gang toilet rooms were located at the north end of the building to serve the base-bid addition and add-alternate addition. The custodial closets were enlarged to provide adequate storage space, office space, and work space. In addition, the existing custodian closet located within the mechanical and electrical room was relocated to eliminate any storage use of the room. A mechanical and electrical room addition has been included to allow for service equipment upgrades.

6. Special Education: The regional program, students with emotional disturbance was consolidated

into a suite complete with office, classrooms, safe room, storage, and toilet facilities. This space replaces the typical special education classroom and toilet.

7. Central Support: The addition allowed many of the central support space deficiencies (as noted

in the Gilbert Report, 2010 HCPSS General Elementary Educational Specifications for New Schools, and discussions with school staff) to be addressed. Reading resource, math resource,

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ESOL and storage as well as office space for Title I instructors have been expanded. The media center was enclosed and includes a combined technology resource room and production lab. The gym and cafetorium space remain relatively unchanged with the exception of a ramp added at the stage for wheelchair access.

8. Circulation: As many of the existing corridor walls are bearing, they were left in place, allowing the

continuous path around the center core area to remain. Access to all classrooms, offices, and work areas is now by a separate corridor and not through an adjoining space as in the previous plan.

9. Insulation was provided at exterior walls in the original 1972 building, with the exception of the

cafetorium and kitchen. The new wall type will consist of 3-5/8 inch metal studs, R-13 polyurethane spray foam insulation, and gypsum board.

10. The casework, furniture, and fixture layouts were reviewed with the school staff during quarter

scale meetings at the school. These include cabinets, shelving, wardrobes, sinks, cubbies, visual display boards, and furniture and equipment that is not part of the contract.

11. Classrooms 07 and 08 were enlarged and an individual toilet room was located nearby. The

redesign will provide flexible space for either a general classroom, pre-K suite or Kindergarten suite.

12. All four classrooms included in the add-alternate (16, 17, 18, and 19) were enlarged to meet the

850 square feet recommended classroom size as noted in the Educational Specifications.

13. During quarter scale meetings, the staff noted the need for acoustical separate at the Regional Program suite. The design team will be working closely with the acoustical engineer to provide maximum sound abatement at this area.

Construction Document Floor Plan Refinements Key features noted on the proposed floor plan are identified by letters in yellow hexagons.

A. Room 080 was designated as the parent volunteer room and will contain data drops, a wardrobe, and space for two desks.

B. Per discussions with the principal and custodian, room 121 was designated as custodian storage

and room 053 (formerly custodian storage) will be designated general classroom storage. C. The common areas were modified in order to eliminate angled walls in adjacent classrooms and

allow more space for the paraeducator desks and wet areas, so their use would not conflict with corridor egress.

D. Toilet rooms 083 and 086, toilet rooms 056 and 058, and toilet rooms 008 and 009 were modified

to provide the preferred HCPSS layout with a multi-fount sink along the corridor.

E. Add Alternate included for quartz tile in lieu of vinyl composition tile (VCT) throughout the building.

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Proposed Construction Document Exterior Elevations Narrative The north and south additions were designed to match the existing brick styles of the existing building, with window and transom head heights extending to the change in materials. Windows were added at the perimeter of the existing building and included at the north additions to provide natural light into the classrooms. At the relocated administrative suite, windows located in existing and new openings not only provide natural light, but a view to the pick-up/drop-off lane and partial view of the parking lot. A canopy will extend past the vestibule to provide protection from the elements, and the new entry vestibule will be glazed to allow daylight and views from the lobby. Due to the addition of tapered insulation at the roof, it was necessary to incorporate a parapet along the perimeter of the main and cafetorium roofs. The parapet is approximately 18 inches high and is clad in a metal panel that will match the skin of the entrance canopy.

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Proposed Space Analysis

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Mechanical Narrative General A Life Cycle Cost Analysis has been performed to determine the appropriate mechanical system. The following system types were considered for this analysis:

1. Hybrid geothermal water source variable air volume (VAV) rooftop heat pump units with a water-to-water heat pump providing heating water for the VAV terminal units.

2. Geothermal water source heat pump system with heat pumps located in closets within classrooms and a dedicated outdoor air rooftop heat pump energy recovery unit to provide ventilation air.

3. Gas-fired DX packaged rooftop units serving VAV terminal units. Hot water is provided to the VAV terminal units by a gas-fired boiler located in the boiler room.

4. Rooftop air-handling units serving VAV terminal units. Hot water is provided to the air-handling units and VAV terminal units by a gas-fired boiler located in the boiler room. Chilled water is provided to the air-handling units by a chiller.

The life cycle cost analysis concluded that the hybrid geothermal system will provide the lowest total installation, maintenance, and energy costs over the life of the equipment. The following heating, ventilating, and air-conditioning (HVAC) system description is provided to describe the selected system in more detail. Heating, Ventilating, and Air Conditioning Systems Controls A new Direct Digital Control (DDC) system will be provided for the HVAC systems serving the entire building. The control system will have a PC-based graphic user interface and will be capable of observing, adjusting, and trend logging set points, occupancy schedules, damper and valve positions, and status for all major HVAC equipment in the project. Central HVAC System A geothermal borehole well field will provide heating and cooling for the building. This well field will be located on the east side of the school adjacent to the existing playground. Geothermal supply and return piping circuits will extend to a piping vault and connect to the main geothermal supply and return headers. The main headers will extend to the mechanical room where they will be pumped throughout the building to the rooftop heat pump units. A water-to-water heat pump unit, located in the main mechanical room, will provide heating water for the VAV terminal units and various other heating elements throughout the building. The existing mechanical room will be expanded to accommodate the new equipment. Air Handling Systems Rooftop variable-volume water-cooled heat pump units will provide heating, ventilating, and air-conditioning for the classrooms, offices, and other auxiliary spaces. These units will be in the same locations as the existing units and will utilize the existing steel roof supports (with modifications) where possible. Roof curbs for TUU-1, 3, & 9 will be replaced. Each system will have full economizer capability. Larger units will have return fans with relief air through a damper integral to the rooftop unit. Smaller units will incorporate exhaust fans. Several rooftop units will be provided for the classroom areas and one unit will serve the administrative suites and media center. VAV terminal units with hot water heat will provide individual temperature control for each classroom, group of offices, and other auxiliary spaces.

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The gymnasium and cafeteria will be served by rooftop variable-volume water-cooled heat pump units. These units will be capable of full economizer operation. Miscellaneous Ventilation Systems

• Mechanical Room: An outdoor air louver and exhaust fan will provide ventilation air for the mechanical room. The same system will be used for refrigerant exhaust in the emergency ventilation mode.

• Toilet Exhaust Systems: Roof-mounted exhaust fans will be located to maximize distance between fan exhaust outlets and rooftop unit intakes.

• Health Suite: Toilet fans shall run continuously. The patient area will have a purge exhaust fan with a wall-mounted on-off switch for odor control.

Supplemental heating will consist of hydronic propeller unit heaters in mechanical and electrical rooms, hydronic cabinet unit heaters at entries, and hydronic convectors in toilet rooms located on exterior walls. Plumbing All plumbing fixtures will be institutional grade with dual flush valves on water closets, 0.35 gpm faucets with aerators, and pint flush urinals. Lead-free water coolers will be specified. Plumbing fixtures will be installed with provisions for the Americans with Disability Act (ADA), which is required for any institutional or commercial building. The under-floor sanitary and storm water piping will be cast iron, and will be connected to the existing under-floor sanitary piping as required. Above-ground sanitary and storm water piping will be cast iron. Above ground radon and sanitary vent will be cast iron or plastic drain, waste, and vent. Interior domestic water piping will be type “L” copper with no lead solder. A gas-fired condensing type water heater will be installed. This will serve the entire building and will be equipped with a hot water circulator and expansion tank. A thermostatic water mixing valve will be installed on the hot water supply to all areas except the kitchen. Water temperature will be maintained at 110 degrees. Fire Protection Water supplies for the sprinkler system will extend from the existing combination domestic/fire water service. The entire building will be sprinklered in accordance with National Fire Protection Association (NFPA) 13. The existing system will be modified to accommodate new room layouts. The building will be divided into sprinkler zones that match fire alarm zones. A flow test was performed on the existing site water main and the results indicate that a fire pump will not be required.

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Energy Statement Energy conservation is an important goal for the design of Stevens Forest Elementary School. Many conventional energy saving techniques are incorporated into the building to achieve energy efficiency. The completed facility will meet current energy requirements of the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) 90.1, and the State of Maryland Energy Index for School Construction. The following are features incorporated into the design:

• Thermal break aluminum windows with insulating glass to reduce energy consumption • Carefully detailed and located insulation and weather-stripping • Air-lock vestibule in the main building entrance • HVAC system controlled by the latest generation of computerized energy management equipment • HVAC system divided into multiple zones for efficient year-round and after-hours community use • Light switching zoned by lighting fixture layout in rooms to minimize energy consumption • Energy saving lamps and ballasts specified in all lighting fixtures

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Electrical Narrative Power Distribution Electrical service will be provided by Baltimore Gas & Electric Company at 277/480 volts via utility-owned, pad mounted transformer located onsite. The existing building service equipment will be removed and a new service switchboard provided. The replacement will be phased to maintain building operation. The new service entrance equipment will require additional space due to added loads. The main service entrance switchboard will be rated approximately 1600 amps and contain the utility current transformer (CT) and metering section, main switches, and service distribution sections. Building interior power distribution shall be rated at 277/480 volt, 3-phase, 4-wire. Separate panelboards with 200 percent neutrals will be provided for computer outlets. Transient voltage surge suppressors will be provided at the service switchboard and at the computer power panelboards. New electrical closets will be required to house electric panels and various systems panels. Where space is limited in the existing building closets, panels will be mounted in storage or utility/support rooms. All branch circuits and feeders shall have separate green ground wire in same raceway. A new, gas-fired, emergency standby generator will be provided in a weatherproof/sound-attenuated enclosure and serve as back-up power source for emergency systems and optional standby system loads. The emergency branch will serve exit and emergency lighting, and fire alarm system equipment. The optional standby branch will serve telecommunications, intercom, and security equipment; kitchen walk-in refrigerator/freezers; and other building loads deemed critical by the owner. Automatic transfer switches will be located in the main electrical room. Lighting In general, interior classroom lighting will be direct/indirect, linear fluorescent type fixtures with 25-watt, 4100K, T-8 lamps and electronic ballasts. Corridors and other spaces will also feature 2’x4’ recessed fluorescent fixtures. Main office areas will have 2’x4’ parabolic fluorescent fixtures. Other energy-saving lamp types such as compact fluorescent downlights and HID lights will also be provided for the interior and exterior lighting designs. The ASHRAE Standards lighting power budget will have to be achieved for Leadership in Energy and Environmental Design (LEED); therefore, the HCPSS lighting levels of 65 footcandles in a classroom will not be met. The Illuminating Engineering Socitey of North America (IESNA) lighting recommendations will be followed. Switches and occupancy sensors will provide general lighting control of classrooms. Unoccupied spaces will include occupancy sensors. Office and support spaces will also be provided with occupancy sensor switching. Multiple switching levels will be provided for larger areas. Exit lights will be the LED type. Emergency lighting will be switched. Occupancy sensors will be provided to control the corridor lighting. A low voltage switching system will be provided to control any space not controlled by occupancy sensors. New stage lighting with dimming switch control will be provided in the cafeteria. Integrated Telecommunications Systems System The existing intercom system, a Rauland Telecenter 2100, will be replaced and located in the main distribution frame (MDF) room. The intercom system will include device outlet boxes, conduit, surface raceways, and sleeves for installation of call switches in each new instructional area with ceiling speakers. Speakers will be provided in corridors, and program clocks will be provided in classrooms and the cafeteria. Telephone handsets shall be provided in new offices and at each new teacher station. The system will be integrated with the security, fire alarm, phone, café and gym sound systems. The master clock portion will be used for system clocks in the corridors, café, gym, media center and classrooms. An individual public address system for the cafeteria and gymnasium with transmitter for hearing impaired shall be provided. These systems will be complete with new speakers, microphone jacks, auxiliary jacks, and wall mounted equipment cabinets.

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An HCPSS-approved system’s contractor will provide the public address system. Fire Alarm System A new, non-addressable, non-coded, zoned, microprocessor based, hardwired fire alarm and detection system will provide complete coverage throughout the building. Occupant notification will be provided by visible and audible signals. Audible (horns) and visual alarm signals will operate throughout the entire building. The Fire Alarm Control Panel (FACP) shall be located in the MDF room. A graphic annunciator panel shall be located in the main entrance lobby outside the administrative suite. All new fire alarm system wiring will be installed in conduit. The fire alarm system initiating devices will consist of smoke detectors, manual pull stations, and sprinkler water flow switches. Smoke detectors will be provided in areas where doors are held-open with magnetic hold-open devices. Manual pull stations will be provided at designated exit locations. Duct smoke detectors will be provided in HVAC systems over 2,000 CFM capacity. A water flow switch will be provided at each sprinkler zone control assembly. Valve supervisory switches will be provided for all sprinkler system control valves. Alarm, trouble, and supervisory signals are displayed on the building fire alarm control panel and all annunciator panels. The FACP will transmit alarm, supervisory, and trouble conditions to the central station via a digital communicator. The operation of any of the following devices will automatically activate the notification appliance (horn and strobe) devices, and release all magnetically open doors:

• Manual pull stations • Smoke Detectors • Sprinkler system water flow or pressure switches

The following devices will transmit a supervisory signal to the central station:

• Valve tamper switches • HVAC duct smoke detector

The following devices or events shall transmit a trouble signal to the central station:

• Loss of AC power to FACP • Open circuit, ground fault, or short in fire alarm system

Security System The existing security system will be replaced with a new building security system installed with keypads at main entry door(s). The new security system design will include device outlet boxes, conduit and raceways for the installation of contact switches, control unit, door control units, card readers, connections to electric strikes, request to exit devices, over ride switches, motion detectors, and new cameras (where required). Existing security cameras will be replaced with new. New security cameras will be provided in the corridors, gym, cafeteria, and all exterior building entrances. New DVR, monitors, a 37 inch in main office and a 17 inch in principles office will be provided. The system will be connected to the new emergency power system. The head-end security equipment will be housed in the new MDF. An HCPSS-approved security contractor will provide the security system. The HCPSS head administrative and security office will monitor the system.

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Technology Infrastructure Data and Video System The existing data network infrastructure will be replaced with new. The existing head-end equipment will remain with modifications and additions as required to serve new infrastructure. The existing branch cabling will be replaced. The new network system design will include device outlet boxes, conduit and raceways, surface raceways, and conduit sleeves for the installation of network cabling. Cabling will include copper Category 6 UTP station and multimode fiber optic backbone cables. The data network infrastructure will support implementation of a wireless LAN system. The CATV distribution system will meet the HCPSS technology requirements including outlets and cabling to the teachers’ workstation and high/low LCD projector outlets. The system will distribute over broadband coaxial cables. The CATV cable distribution system will connect to the classroom ceiling mounted LCD projectors through TV tuners located in the teacher’s wardrobe cabinet. The video controller shall be in the MDF. The system shall support an electronic bulletin board for distribution of messages or announcements to televisions sets school wide. Telephone System The existing telephone system will be replaced with new. The existing head-end equipment will remain with modifications and additions as required to serve new system infrastructure. The existing branch cabling will be replaced. The system will be relocated to the new MDF. The new telephone system design will include device outlet boxes, conduit and raceways, surface raceways, and conduit sleeves for the installation of cabling and equipment. The telecommunications system will be provided by an HCPSS-approved information technology contractor. �

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Construction Document Cost Estimate

Schematic Design

Development Construction Documents

Design Design Design Phasing & Temporary Facilities $1,351,387 $842,538 $932,472 Site Work $148,979

$1,048,619 $734,800

Renovation including addition $9,512,786

$9,816,879

$10,251,344

Total for Project $11,013,152

$11,708,036 $11,918,616

Options: Add Alternate #1 - Add 5,313 SF to Base

Building Classroom Addition

$1,061,130

$1,154,145 $1,050,630

Add Alternate #2 - Add new Play Area

$75,841

Add Alternate #3 - Quartz Tile in lieu of VCT

$105,200

Total for Project (including Alternates) $12,074,282

$12,862,181 $13,150,287

Notes Construction cost was prepared by the construction manager, Lewis Construction, and

assumes that bids will be received February 2012.

Estimate includes a 3% contingency for construction documents and 3% for escalation

(divisions 2 through 33)

Estimate does not include prevailing wage rates. Estimate does not include a project contingency.

Estimate does not include abatement of hazardous materials.

Overall estimate has increased due to the following: • Corridor walls have been changed from drywall/metal stud to CMU • Underpinning of existing footing