40 CFR 761.312 - Compositing of samples.

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There are 2 Updates appearing in the Federal Register for 40 CFR 761. View below or at eCFR (GPOAccess)
§ 761.312 Compositing of samples.
For a surface originally contaminated by a single source of PCBs with a uniform concentration, it is permissible to composite surface wipe test samples and to use the composite measurement to represent the PCB concentration of the entire surface. Composite samples consist of more than one sample gauze extracted and chemically analyzed together resulting in a single measurement. The composite measurement represents an arithmetic mean of the composited samples.
(a) Compositing samples from surfaces to be used or reused. For small or irregularly shaped surfaces or large nearly flat surfaces, if the surfaces are contaminated by a single source of PCBs with a uniform concentration, composite a maximum of three adjacent samples.
(b) Compositing samples from surfaces to be disposed of off-site or on-site.
(1) For small or irregularly shaped surfaces, composite a maximum of three adjacent samples.
(2) For large nearly flat surfaces, composite a maximum of 10 adjacent samples.

Title 40 published on 2013-07-01

The following are only the Rules published in the Federal Register after the published date of Title 40.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-06-13; vol. 79 # 114 - Friday, June 13, 2014
    1. 79 FR 33867 - Polychlorinated Biphenyls (PCBs): Manufacturing (Import) Exemption for the Defense Logistics Agency (DLA)
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Withdrawal of Direct final rule and Notice of Informal Hearing.
      Effective June 13, 2014, EPA withdraws the direct final rule published at 79 FR 18471 on April 2, 2014. The informal hearing will take place on Tuesday, July 8, 2014, from 9 a.m. to 1 p.m. All those wishing to provide oral comments at the hearing must send a written request to EPA. Requests must be received on or before July 1, 2014.
      40 CFR Part 761

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United States Code

Title 40 published on 2013-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR 761 after this date.

  • 2014-06-13; vol. 79 # 114 - Friday, June 13, 2014
    1. 79 FR 33867 - Polychlorinated Biphenyls (PCBs): Manufacturing (Import) Exemption for the Defense Logistics Agency (DLA)
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Withdrawal of Direct final rule and Notice of Informal Hearing.
      Effective June 13, 2014, EPA withdraws the direct final rule published at 79 FR 18471 on April 2, 2014. The informal hearing will take place on Tuesday, July 8, 2014, from 9 a.m. to 1 p.m. All those wishing to provide oral comments at the hearing must send a written request to EPA. Requests must be received on or before July 1, 2014.
      40 CFR Part 761