Exploration no. 146239 is a Test pit (depth 8 feet) named: TP-CJS-1-4 described in subsurface document no. 64057. The document, a report titled Geotechnical Memorandum, Landsburg Facilities and Chlorination Project, King County, Washington was prepared by City of Seattle, Public Utilities, Geotechnical Engineering on 11-09-2012 for a Utility project.