Montgomery County, MD
GTA provided environmental consulting, underslab drainage system design, and construction observation and testing (COT) services for the new 15-story, 154-unit luxury apartment tower with two levels of underground parking, located on 1.65 acres and within walking distance to the Bethesda Metro station.
GTA prepared a Maryland Department of the Environment (MDE) Voluntary Cleanup Program (VCP) application, Phase I and II ESA, and tasks associated with preparation and implementation of an Environmental Management Plan (EMP) and Health and Safety Plan (HASP) so that construction could proceed under MDE regulatory oversight. GTA prepared a final EMP Completion Report and is pursuing final regulatory closure.
COT services include a pre-construction condition survey and crack monitor installation for an existing retaining wall of neighboring property. COT services also include Support of Excavation (SOE) monitoring of soldier piles, excavation, tiebacks, and wood lagging installation, crack monitor readings, and survey point review. COT services related to the building construction were performed in accordance with the Montgomery County Special Inspections Program and include observation and testing of foundation subgrades, foundation backfill, underslab drain tile, post tension slabs and beams; formwork, reinforcing steel, cast-in-place concrete, masonry, structural steel, light gauge metal framing, laboratory services, and engineering consultation. GTA also performed observation of below grade CETCO waterproofing system installation. COT services further included observation and testing of utility construction, micro-bio-retention facilities, and site pavements, landscaping walls, and sidewalks.