Field Manual for Grid Sampling of PCB (Polychlorinated Biphenyl) Spill Sites to Verify Cleanup

摘要

The purpose of this manual is to provide detailed, step-by-step guidance to EPA staff for using hexagonal grid sampling at a PCB spill site. Guidance is given for preparing the sample design; collecting, handling, and preserving the samples taken; maintaining quality assurance and quality control; and documenting and reporting the sampling procedures used. An optional strategy for compositing samples is given in the appendix. This is a companion document to the report 'Verification of PCB Spill Cleanup by Sampling and Analysis' (EPA 560/5-85-026, August 1985, Second Printing). This 'how-to' report concentrates on detailed guidance for field sampling personnel and does not attempt to provide background information on the techniques presented. The types of field sampling situations discussed in this manual are those typically found when a PCB spill results from a PCB article, PCB container, or PCB equipment spill. Unusual PCB spill situations, such as elongated spills on highways from a moving vehicle, large spills in waterways, and large, catastrophic spills, are not addressed.