MFS coordinated with a trusted subcontractor drilling agency to conduct ten test borings throughout the project site to a depth of 15 feet to 16 feet below existing site grade. Soil samples were taken via Standard Penetration Testing (SPT) continuously from existing site grade to each respective boring termination depth. In addition, five permeability tests were conducted at depths ranging from 6.2 feet to 8.6 feet below grade at boreholes adjacent to select boring locations in accordance with Appendix D of the New York State Department of Environmental Conservation (NYSDEC) Stormwater Management Design Manual.
MFS provided on-site, full-time oversight during the subsurface field investigation for the project. During boring operations, MFS observed the subsurface conditions and generated test boring logs to include soil classifications in accordance with the United Soil Classification System (USCS) and the New York City Building Code (NYCBC), groundwater observations, action of equipment, and other noteworthy observations. During the permeability testing, MFS conducted the testing and recorded the drop in water at specified intervals to determine the permeability rates of the soils.
Upon completion of the field investigation, MFS coordinated with an accredited geotechnical testing laboratory to conduct laboratory testing on select soil samples to verify field classifications and obtain geotechnical physical characteristics. The laboratory testing conducted on soil samples included moisture content and sieve and hydrometer analyses.
The results of the field investigation and laboratory testing were compiled and presented in a written Geotechnical Data Report for the subject project. The report included a detailed summary of the field methods used as well as final typed boring logs, permeability test logs, and an as-drilled subsurface investigation plan.