THE CGC COMMUNICATOR
                            CGC #598
                    Friday, October 24, 2003
               Robert F. Gonsett, W6VR, Publisher
           Stephen H. Blodgett, W7RNA, Letters Editor
                  mailto: steve@earthsignals.com
    Copyright 2003, Communications General=AE Corporation (CGC)
  The FCC has proposed to fine four Mt. Wilson broadcast
licensees a total of $40,000 for jointly violating the RF
radiation ("RFR") limits on a portion of Mt. Wilson that is
accessible to the general public.
  The underlying FCC RFR investigation was first mentioned
in CGC #523 (July 16, 2002), and the Commission's official
findings are presented below, verbatim, in this special edition
  If you have comments on the Commission's proposed action,
or would like to tell our readers how the stations involved
took action to limit public access to the area where the RFR
exceeded the maximum permissible exposure limit, please send
mailto: steve@earthsignals.com.
  We appreciate the many letters already received alerting
us to the fact that the FCC has reached a decision in this
precedent-setting case.
  [FCC News release, for immediate release, October 22, 2003]
  Washington, D.C. - Today, for the first time, the FCC
proposed forfeitures against four licensees for violating the
radiofrequency radiation maximum permissible exposure limits at
a multi-user site where the power density level produced by each
individual licensee was within acceptable limits, but the
cumulative effect exceeded the limits established by the FCC.
The transmitters at issue are located on Mt. Wilson, in Los
Angeles, California.  The Commission proposed a forfeiture of
$10,000 for each station, for a total of $40,000.
  FCC rules establish maximum permissible exposure (MPE)
limits for radiofrequency radiation (RFR) from FCC-regulated
transmitters.  If these limits are exceeded due to the cumulative
RFR emissions of multiple transmitters, as at Mt. Wilson, then
all of the licensees whose transmitters produce power density
levels exceeding 5% of the power density exposure limit
applicable to their particular transmitter share responsibility
for reducing RFR to permissible levels.
  FCC agents inspecting the Mt. Wilson transmitter site
determined that RFR levels in a publicly accessible area,
located approximately 100 feet from a U.S. Post Office, exceeded
the maximum permissible exposure limits by 60.5%.  Measurements
taken by the agents revealed that transmitters for four stations,
KBIG-FM, KKBT, KRTH-FM, and KWHY-TV, each were producing RFR
power density levels at significantly more than 5% of the public
RFR MPE limits in this area.  In addition, the agents found that
the licensees of the four stations failed to take adequate steps
to prevent the public from accessing areas that exceeded the RFR
exposure limits.  Shortly after the violation was brought to the
stations' attention by the FCC, however, they took steps to limit
public access to the area where the radiofrequency radiation
exceeded the maximum permissible exposure limits.
  The Commission issued Notices of Apparent Liability for
$10,000 each to AMFM Radio Licenses, L.L.C. ("AMFM"), licensee
of FM radio station KBIG-FM; Radio One Licenses, LLC ("Radio
One"), licensee of FM radio station KKBT; Infinity Broadcasting
Operations, Inc. ("Infinity"), licensee of FM radio station
KRTH-FM; and Telemundo of Los Angeles License Corporation
("Telemundo"), licensee of TV station KWHY-TV, all serving
Los Angeles, California.
  Action by the Commission on October 20, 2003, by Notice of
Apparent Liability for Forfeiture (FCC 03-258).  Chairman Powell,
Commissioners Abernathy, Copps, Martin and Adelstein.
  - FCC -
  Editor's Note - This text is also posted at:
  The CGC Communicator is published for broadcast engineering
  professionals in so. California by Communications General=AE
  Corporation (CGC), consulting radio engineers, Fallbrook, CA.
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