40 CFR § 761.265 - Sampling bulk PCB remediation waste and porous surfaces.
(1) Use a core sampler to collect a minimum of one core sample for the entire depth of the waste at the center of the container. Collect a minimum of 50 cm 3 of waste for analysis.
(2) If more than one core sample is taken, thoroughly mix all samples into a composite sample. Take a subsample of a minimum of 50 cm 3 from the mixed composite for analysis.
(3) For more than three containers of the same type, list the containers and assign each container an unique sequential number. Use a random number generator or table to select a minimum of 10 percent of the containers from the list, or select three containers, whichever is the larger.
(4) Sample the selected container(s) according to paragraph (b) of this section.
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