Gendell Center for Engineering, Energy, and the Environment

Publications [#53708] of David E. Schaad

Papers Published

1. Schaad, David E and Halley, James M. and Wilson, Scott A., Using UCS as a surrogate performance standard at the NCSU NPL site, Journal of Environmental Engineering, vol. 132 no. 10 (2006), pp. 1355 - 1365 [(ASCE)0733-9372(2006)132:10(1355)]
   (last updated on 2007/03/23)

   Abstract:
   Treated hazardous material at the North Carolina State University (NCSU) Lot 86 National Priorities List (NPL) Site was evaluated using unconfined compressive strength (UCS) as a surrogate performance standard for the toxicity characteristic leaching procedure (TCLP). During a preconstruction treatability study, UCS test results were related to the TCLP performance standards as stipulated in the record of decision. During construction, 113 UCS samples were obtained and test results indicated that over 8,410 m³ (11,000 yd³) of pre-RCRA (Resource Conservation and Recovery Act) chemical waste generated from the University's educational and research laboratories had been successfully stabilized. Using a crane-mounted mixing unit for a portion of the stabilization operations, and a trackhoe unit for the remainder of the construction, 2.03 Gg (2,240 t) of cement and 2.81 ML (743,000 gal.) of water were mixed with impacted soil and waste material resulting in a 3 m (10ft) thick encapsulated monolith half the size of a football field. © 2006 ASCE.

   Keywords:
   Hazardous materials;Waste treatment;Leaching;Compressive strength;