EPA 560/5-86-017 Field Manual for Grid Sampling of PCB Spill Sites to Verify Cleanup  

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. Emphasis is placed on sampling sites which have already been cleaned, although the sampling methods presented may also be used at PCB spill sites which have not been cleaned. 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.