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 Code of Federal Regulations (Last Updated: November 8, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter R - Toxic Substances Control Act
 Part 761 - Polychlorinated Biphenyls (Pcbs) Manufacturing, Processing, Distribution in Commerce, and Use Prohibitions
 Subpart M - Determining a PCB Concentration for Purposes of Abandonment or Disposal of Natural Gas Pipeline: Selecting Sample Sites, Collecting Surface Samples, and Analyzing Standard PCB Wipe Samples

  § 761.253 - Chemical analysis.  

Latest version.

  • § 761.253 Chemical analysis.

    Cross Reference
    Link to an amendment published at 88 FR 59695, Aug. 29, 2023.

    (a) Extract PCBs Select applicable method(s) from the following list to extract PCBs and determine the PCB concentration from the standard wipe sample collection medium and clean-up the extracted PCBs in accordance with either Method 3500B/3540C or Method 3500B/3550B from EPA's SW-846, Test Methods for Evaluating Solid Waste, or a method validated under subpart Q of this part. Use Method 8082 from SW-846, or a method validated under subpart Q of this part, to analyze these extracts for PCBs.

    (

    : SW–846 Method 3540C, Method 3550C, Method 3541, Method 3545A, Method 3546, or Method 8082A (all standards incorporated by reference in § 761.19). Modifications to the methods listed in this paragraph or alternative methods not listed may be used if validated under Subpart Q of this part or authorized in a § 761.61(c) approval.

    (b) Report all PCB sample concentrations in µg/100 cm2 (16 square inches) of surface sampled. If sampling an area smaller than 100 cm2, report converted sample concentrations in accordance with § 761.243(b).

    [63 FR 35462, June 29, 1998, as amended at 88 FR 59695, Aug. 29, 2023]