FCC Record, Volume 34, No. 14, Pages 11031 to 11845, November 25 - December 6, 2019 Page: 11,767
iv, 11031-11845p. ; 28 cm.View a full description of this book.
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the occupational exposure limit is exceeded. However, proper use of RF personal protective equipment
may be considered sufficient in lieu of time averaging for occupational personnel in the areas in which the
occupational exposure limit is exceeded. If such procedures or power reduction, and therefore Category
reduction, are not feasible, then lockout/tagout procedures in 29 CFR Section 1910.147 must be followed.
(v) Category Four - WARNING/DANGER: Where the occupational limit could be exceeded by a
factor of more than ten, "WARNING" signs with the associated color (orange), controls, or indicators
(e.g., chains, railings, contrasting paint, diagrams) are required (in addition to the positive access control
established for Category Two) surrounding the area in which the occupational exposure limit in a
controlled environment is exceeded by more than a factor of ten Signs must contain the components
discussed in paragraph (b)(4)(vi) of this section. "DANGER" signs with the associated color (red) are
required where immediate and serious injury will occur on contact, in addition to positive access control,
regardless of mitigation actions taken in Categories Two or Three. If the boundaries between Category
Three and Four are such that placement of both Category Three and Four signs would be in the same
location, then the Category Three sign is optional. No access is permitted without Category reduction. If
power reduction, and therefore Category reduction, is not feasible, then lockout/tagout procedures in 29
CFR Section 1910.147 must be followed.
(vi) RF exposure advisory signs must be viewable and readable from the boundary where the
applicable exposure limits are exceeded, pursuant to 29 CFR Section 1910.145, and include at least the
following five components:
(A) Appropriate signal word, associated color {i.e., "DANGER" (red), "WARNING" (orange),
"CAUTION," (yellow) "NOTICE" (blue)};
(B) RF energy advisory symbol);
(C) An explanation of the RF source;
(D) Behavior necessary to comply with the exposure limits; and
(E) Up-to-date contact information.
(5)(i) In general, when the exposure limits specified in Section 1.1310 are exceeded in an accessible
area due to the emissions from multiple fixed RF sources, actions necessary to bring the area into
compliance or preparation of an Environmental Assessment (EA) as specified in Section 1.1311 are the
shared responsibility of all licensees whose RF sources produce, at the area in question, levels that exceed
5% of the applicable exposure limit proportional to power. However, a licensee demonstrating that its
facility was not the most recently modified or newly-constructed facility at the site establishes a
rebuttable presumption that such licensee should not be liable in an enforcement proceeding relating to
the period of non-compliance. Field strengths must be squared to be proportional to SAR or power
density. Specifically, these compliance requirements apply if the square of the electric or magnetic field
strength exposure level applicable to a particular RF source exceeds 5% of the square of the electric or
magnetic field strength limit at the area in question where the levels due to multiple fixed RF sources
exceed the exposure limit. Site owners and managers are expected to allow applicants and licensees to
take reasonable steps to comply with the requirements contained in Section 1.1307(b)(1) and, where
feasible, should encourage co-location of RF sources and common solutions for controlling access to
areas where the RF exposure limits contained in Section 1.1310 might be exceeded. Applicants and
licensees are required to share technical information necessary to ensure joint compliance with the
exposure limits, including informing other licensees at a site in question of evaluations indicating possible
non-compliance with the exposure limits.11767
Federal Communications Commission
FCC 19-126
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United States. Federal Communications Commission. FCC Record, Volume 34, No. 14, Pages 11031 to 11845, November 25 - December 6, 2019, book, December 2019; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1637223/m1/745/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.