---
kind: "section"
citation: "40 C.F.R. § 761.395"
title: "40"
number: "761.395"
heading: "A validation study."
url: "https://uscodex.org/cfr/40/761.395"
---

# §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) Select applicable method(s) from the following list to extract PCBs and determine the PCB concentration from the standard wipe sample collection medium: SW-846 Method 3540C, Method 3550C, Method 3541, Method 3545A, Method 3546, or Method 8082A (all standards incorporated by reference in [§ 761.19](/cfr/40/761.19.md)). Modifications to the methods listed in this paragraph or alternative methods not listed may be used if validated under [subpart Q](/cfr/40/subpartQ.md) 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)](/cfr/40/761.79.md?p=d-4) according to the parameters tested.

## Notes

### Amendments

[63 FR 35473, June 29, 1998, as amended at 88 FR 59696, Aug. 29, 2023]

### Source

Source: 63 FR 35473, June 29, 1998, unless otherwise noted.

### Authority

Authority: 15 U.S.C. 2605, 2607, 2611, 2614, and 2616 and 42 U.S.C. 6939g.

### Source

Source: 43 FR 7156, Feb. 17, 1978, unless otherwise noted.

### Amendments

[63 FR 35473, June 29, 1998, as amended at 88 FR 59696, Aug. 29, 2023]