White Paper:

 Bioavailability of Contaminants in Soils and Sediments: Status and Recommendations (2016)

User's Manual:
Draft Laboratory, Field, and Analytical Procedures for Using Passive Sampling in the Evaluation of Contaminated Sediments (2016)

ITRC Guidance:
Bioavailability of Contaminants in Soil: Considerations for Human Health Risk Assessment
  Guide for DOD Remedial Project Managers:
Integrating Passive Sampling Methods into Management of Contaminated Sediment Site (2016)