K-12 Schools

El Cerrito High School Sports Fields – El Cerrito, CA

Geotechnical Investigation
Construction Observation and Testing Services

echs-stadiumAKA conducted a geotechnical investigation and provided geotechnical engineering services during construction of the new sports field at El Cerrito High School (ECHS) in Contra Costa County. Completed in 2016, the ECHS Sports Field project included the construction of a new track and field, new visitor bleachers, 5 new buildings, site retaining walls, and exterior pavements. AKA’s geotechnical investigation included drilling borings, conducting laboratory tests, and providing recommendations for the mitigation of existing fill and expansive soils at the site. AKA also provided comprehensive geotechnical observation and testing services during construction that included observation/testing of fill placement, foundation construction, and drainage; miscellaneous consultation; and preparation of daily field reports, summary reports, and Geotechnical Verified Reports for submittal to the DSA.

El Cerrito High School – El Cerrito, CA

Geotechnical and Geologic Hazards Investigation
Construction Observation and Testing Services

El Cerrito High School - El Cerrito, CAAKA conducted a design-level geotechnical investigation and geologic hazards study for the new El Cerrito High School (ECHS) campus in Contra Costa County. ECHS is located near the base of the East Bay Hills in a geologic environment that includes landslides, faults, and shallow bedrock. Our study included trenching to locate the toe of an adjacent landslide complex, establishing appropriate landslide setbacks, drilling borings to evaluate geotechnical conditions, and producing a design-level geotechnical and geologic hazard evaluation report. Removal of old fill and re-use of onsite excavated bedrock as non-expansive select fill were also key geotechnical issues. Our report was favorably peer-reviewed with no exceptions by the California Geological Survey.

Ecole Bilingue de Berkeley Schoolyard Expansion and Renovation – Berkeley, CA

Geotechnical Investigation
Construction Observation and Testing Services

Ecole BilingueAKA performed a geotechnical investigation for the proposed schoolyard expansion and renovation at the Ecole Bilingue de Berkeley. Founded in 1977, Ecole Bilingue de Berkeley offers a high quality bilingual education from preschool through 8th grade by integrating a French and American curriculum in an international environment. The expansion and renovation of the schoolyard included the demolition of portions of the adjacent one-story warehouse building and conversion of the property to part of the schoolyard. The improvements on the annexed warehouse property consisted of the construction of a sod sports field, basketball court, bathroom/storage building, and trash enclosure. The improvements on the existing schoolyard included the construction of a lawn amphitheatre with concrete stage, an outdoor wood gazebo, and a seasonal stream/water retention area with a pedestrian bridge. AKA’s geotechnical investigation consisted of reviewing data gathered from our previous investigation at the site, drilling borings, conducting laboratory tests, and providing recommendations for the mitigation of expansive soils at the site and design of the proposed schoolyard improvements. AKA also provided comprehensive geotechnical observation and testing services during the construction of the schoolyard improvements.

St. John the Baptist School Expansion and Remodel – El Cerrito, CA

Geotechnical Investigation
Construction Observation and Testing Services

St. John the BaptistAKA conducted a geotechnical investigation for the proposed expansion and remodel of the St. John the Baptist School in El Cerrito. The proposed project consists of the remodel of portions of the existing school buildings and the expansion of the existing school through the construction of two additions that will include a new mechanical room, conference room, media center, student and staff restrooms, and janitorial storage. AKA’s geotechnical investigation included drilling borings at the site, conducting laboratory tests, and providing recommendations for the mitigation of expansive surficial soils, existing fill soils, and differential foundation performance (existing vs. new construction). The proposed expansion and remodel of the school will be performed in phases and AKA provided comprehensive geotechnical observation and testing services and provided consultation to resolve on-site geotechnical issues during the first phase of construction which involved the remodel of portions of the existing school buildings.

Lexington Elementary School – Los Gatos, CA

Geotechnical and Geologic Peer Review Services

Prospect Sierra School - El Cerrito, CAThe Lexington Elementary School project consisted of the complete demolition and rebuilding of the 1950s school. The new school will accommodate up to 385 students and will include up to 16 new classrooms and a new library, multi-purpose building, and administration building. AKA provided peer review services for the geologic and geotechnical studies at the Lexington Elementary School site. The reports by others were reviewed by California Geologic Survey (CGS) and CGS found the reports to be insufficient. CGS concluded that the geologically complex site is possibly underlain by landslide deposits that may undergo movement during future large earthquakes. The site is within 1400 feet of the San Andreas Fault and in an area of mapped landslide hazard. On the basis of our review, we recommended that a staged program of investigation be developed to collect and analyze additional site data to help complete and resolve data gaps and uncertainties. The studies were intended to confirm whether landslide materials are present under the site and analyze possible seismic movements in more detail to help conclude if the site is suitable for a school modernization project. Our peer review included active communication with the project team, CGS, and the very active community. AKA performed geotechnical and geologic observations during the drilling of borings, the study of fault trenches, and the logging of a large diameter boring. The studies included a fault rupture assessment, earthquake ground motion characterization, landslide characterization, static and seismic slope stability and displacements, coseismic ground deformation, and liquefaction assessment. With the help of AKA’s involvement and active communications with CGS, the revised geotechnical and geologic report was accepted by CGS.

Berkeley High School – Berkeley, CA
Student Union, Cafeteria, Library, Gym, and Pool Buildings

Geotechnical and Geologic Hazards Investigation
Construction Observation and Testing Services

Berkeley High School - Berkeley, CAAKA conducted a design-level geotechnical investigation and geologic hazards study for a significant expansion to Berkeley High Schools campus. The project location, in Downtown Berkeley, is near the former location of Strawberry Creek and adjacent areas have recently been designated by the California Geological Survey as a liquefaction hazard zone. Our geotechnical investigation found the two-block-long building site to be generally free of liquefaction hazards and identified strong earthquake ground shaking, old fills, and expansive onsite soils as the primary concerns. Geotechnical mitigation involved supporting the buildings on deepened spread footings bearing on compacted fill or natural soil below the depth of significant shrink/swell behavior.

AKA provided comprehensive geotechnical services during construction of this major school expansion project, which included replacing unsuitable onsite fill soils with engineered fill. All our work for the project was performed in accordance with DSA requirements and the school buildings are all open and actively in use.

Prospect Sierra School – El Cerrito, CA
Arts Building

Geotechnical Investigation
Geotechnical Services during Construction

Prospect Sierra School - El Cerrito, CAAKA conducted a geotechnical investigation for a new Arts Building at Prospect Sierra School, which is located in El Cerrito near the base of the East Bay Hills. A review of published information showed the Arts Building site to be located along the edge of a very large landslide complex that extends thousands of feet upslope. However, AKA’s detailed review of onsite geotechnical data and targeted test borings were able to demonstrate that the proposed site was disconnected from the upslope portion of the nearby landslide, and that the landslide did not pose a significant hazard to the future Arts Building. A conventional shallow foundation system was therefore deemed appropriate for foundation support, which resulted in significant cost savings for the project. Follow-on services provided by AKA included a geotechnical review of the project plans and specifications and comprehensive geotechnical services during construction. The Arts Building is now open and in active use.

Pinole Middle School – Pinole, CA
Gymnasium and Library/Classroom Building

Geotechnical and Geologic Hazards Investigation
Construction Observation and Testing Services

Pinole Middle School - Pinole, CAAKA conducted a design-level geotechnical investigation and geologic hazards study for the new Pinole Middle School Gymnasium and Library/Classroom Building in Contra Costa County. Our study included drilling borings to evaluate geotechnical conditions and producing a design-level geotechnical and geologic hazard evaluation report. Our investigation revealed that extensive deposits of old fill existed in areas where the new buildings were planned. During an initial phase, we worked closely with the school district to identify alternate building locations to reduce the amount of mitigation required. Geotechnical mitigation involved the removal of old fill, installation of subdrainage, and construction of a new engineered fill slope and pad. Our report was favorably peer-reviewed with no exceptions by the California Geological Survey.

AKA provided comprehensive geotechnical engineering services during the construction of the new buildings. The scope of our construction-phase services included observation/testing of excavation, drainage installation, fill placement, and foundation construction; consultation; and preparation of daily reports, summary reports, and Geotechnical Verified Reports for submittal to the DSA.

Lowell High School – San Francisco, CA
Classroom Building

Geotechnical and Seismic Hazards Investigation
Construction Observation and Testing Services

Lowell High School - San Francisco, CAAKA conducted a design-level geotechnical investigation and geologic hazards study for expansion to Lowell High School in San Francisco. AKA identified strong earthquake ground shaking and differential settlement of loose dune sands as the primary seismic hazard for this major multi-story classroom building. AKA consulted with the project team on foundation alternatives, which included drilled piers, piles, and footings supported on improved ground. Cost-benefit analyses led to a preferred ground improvement alternative involving the excavation and recompaction of loose near-surface soils, which allowed the building to be supported on cost-effective spread footing foundations.

AKA observed and tested during geotechnical mitigation, foundation construction, and other geotechnical aspects of the project. DSA interactions were managed by the project Inspector of Record, to whom we submitted daily reports documenting our geotechnical observations and test results. All our work for the project was performed in accordance with DSA requirements and the school building is open and actively in use.

Alice Fong Yu Alternative School – San Francisco, CA

Geotechnical Investigation and Geologic Hazards Evaluation
Construction Observation and Testing Services

Alice Fong Yu Alternative School - San Francisco, CAAKA performed both a geotechnical investigation and geologic hazards evaluation (in conjunction with Joyce Associates) for two new classroom buildings and a multi-purpose building at the Alice Fong Yu Alternative School in San Francisco. Potentially loose dune sands underlie the site. The potential for seismic hazards was determined to be low and normal foundation construction was approved. AKA monitored the construction of the new facilities.