40 CFR 761.312 - Compositing of samples.

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There is 1 rule 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.

  • 2014-04-02; vol. 79 # 63 - Wednesday, April 2, 2014
    1. 79 FR 18471 - Polychlorinated Biphenyls (PCBs): Manufacturing (Import) Exemption for the Defense Logistics Agency (DLA)
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Direct final rule.
      This direct final rule will be effective July 1, 2014 without further notice, unless EPA receives adverse written comment or a request for an informal hearing (per 40 CFR part 750, subpart B) by May 2, 2014 If adverse comments or a request for an informal hearing are received, EPA will publish a timely withdrawal in the Federal Register informing the public that this rule will not take effect based on the direct final rule. EPA will then address all public comments in any subsequent final rule based on the proposed rule which accompanies this direct final rule.
      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.

  • 2014-04-02; vol. 79 # 63 - Wednesday, April 2, 2014
    1. 79 FR 18471 - Polychlorinated Biphenyls (PCBs): Manufacturing (Import) Exemption for the Defense Logistics Agency (DLA)
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Direct final rule.
      This direct final rule will be effective July 1, 2014 without further notice, unless EPA receives adverse written comment or a request for an informal hearing (per 40 CFR part 750, subpart B) by May 2, 2014 If adverse comments or a request for an informal hearing are received, EPA will publish a timely withdrawal in the Federal Register informing the public that this rule will not take effect based on the direct final rule. EPA will then address all public comments in any subsequent final rule based on the proposed rule which accompanies this direct final rule.
      40 CFR Part 761