PROJECTS Santana Row Office Development (Lot 11) — San Jose Federal Realty Investment Trust retained Cornerstone Earth Group to provide geotechnical and environmental engineering services for a 6-story commercial/office complex with a 4-level subterranean garage. The project included the deepest excavation in San Jose at its time with cuts up to 48 feet. The office complex and parking garage have footprints of 230,000 and 271,000 square feet, respectively. Cornerstone’s Value Added Benefits: Cornerstone provided geotechnical engineering services during construction: Observation and testing of soil nail and tie-back installation to cost effectively address various construction challenges that included perched water, tight construction tolerances, and unexpected subsurface soil conditions. Observation and testing during mass grading, foundation excavations, utility trench backfill, and more. Cornerstone also provided environmental services: Coordination with state regulatory agency, DTSC, to address environmental restrictions related to former agricultural Site use. Soil profiling to develop cost-effective disposal alternatives. Dust monitoring during excavation activities to document (and mitigate if needed) potential impact to surrounding businesses. ©2021 Cornerstone Earth Group, Inc. All rights reserved.

PROJECTS Central and Wolfe Office Campus — Sunnyvale San Francisco-based developer Jay Paul Company is building a 777,000 square foot office development at the intersection of Central Expressway and Wolfe Road in Sunnyvale, which is designed in the shape of a three-leaf clover. The campus’ three connected main 6-story buildings (4-stories of office space over 2-stories of podium parking) will protrude from a central courtyard, wrapped in a sweeping, curvilinear glass skin that appears to billow in and out. Park-like greenery will surround the site. A 5-story parking structure and a 1-story amenities building are also being constructed. Jay Paul Company hired Level 10 Construction as the General Contractor and Cornerstone Earth Group as the Geotechnical Engineer. Cornerstone’s Value Added Benefits: Provided foundation alternatives to help save construction costs. Provided ground improvement recommendations to economically mitigate and reduce impacts from potentially significant consolidation/static and liquefaction induced settlement. Performed in-situ field density testing of undocumented fill to minimize over-excavation and re-compaction. Provided staffing for an expedited construction schedule. Presented cost-effective field solutions (e.g. stabilization fabric, lime treatment, etc.) during construction to address construction challenges, including mitigation of unstable pavement subgrades, shallow ground water, and saturated soils. Provided options to reuse on-site materials such as recycled asphalt concrete pavement and aggregate base, and crushed Portland cement concrete. ©2021 Cornerstone Earth Group, Inc. All rights reserved.