CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER R—TOXIC SUBSTANCES CONTROL ACT (Parts 700–799) > PART 761—POLYCHLORINATED BIPHENYLS (PCBs) MANUFACTURING, PROCESSING, DISTRIBUTION IN COMMERCE, AND USE PROHIBITIONS > SUBPART T—Comparison Study for Validating a New Performance-Based Decontamination Solvent Under § 761.79(d)(4) (§761.380 to §761.398) > 761.395—A validation study.

761.395—A validation study.

(a) Decontaminate the following prepared sample surfaces using the selected testing parameters and experimental conditions. Take a standard wipe sample of the decontaminated surface.
(1) At least one uncontaminated surface. The surface levels of PCBs on the uncontaminated surface must be <1 µg/100 cm 2.
(2) At least seven contaminated surfaces.
(b) (1) Use SW-846, Test Methods for Evaluating Solid Waste methods for sample extraction and chemical analysis as follows: Use Method 3500B/3540C or Method 3500B/3550B for the extraction and cleanup of the extract and Method 8082 for the chemical analysis, or methods validated under subpart Q of this part.
(2) Report all validation study surface sample concentrations on the basis of micrograms of PCBs per 100 cm 2 of surface sampled.
(c) Following completion of the validation study, measurements from the contaminated surfaces must have an arithmetic mean of ≤10 µg/100 cm 2. If the arithmetic mean is >10 µg/100 cm 2, then the validation study failed and the solvent may not be used for decontamination under § 761.79(d)(4) according to the parameters tested.