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                       FEDERAL COMMUNICATIONS COMMISSION

                               ENFORCEMENT BUREAU

                                 WESTERN REGION

                              San Francisco Office

                          5653 Stoneridge Dr., Ste 105

                           Pleasanton, CA 94588-8543

                               December 10, 2007

   Remedial Construction Services, L.P.

   Houston, Texas 77064

                         NOTICE OF UNLICENSED OPERATION

   Case Number: EB-07-SF-282

   Document Number: W20083296002

   The San Francisco Office received a complaint from the National Park
   Service (NPS) reporting that an unlicensed radio station on 173.675 MHZ
   was operating in the Fresno, California vicinity causing interference to
   Sequoia and Kings National Park (SEKI), California radio operations. This
   channel was authorized for government-only use and was assigned for
   air-to-ground and flight-follow usage. On November 2, 2007, an agent from
   this office confirmed by direction finding techniques that radio signals
   on frequency  173.675 MHz were emanating from transceivers used by
   Remedial Construction Services, L.P. (RECON) employees in the vicinity of
   3265 South Golden State Blvd and Frontage Road, Fresno, California. The
   Commission's records show that no license was issued for your business
   operation  on 173.675 MHz at this location in Fresno, California, as the
   frequency is authorized for Federal Government use only.

   Radio stations must be licensed by the FCC pursuant to 47 U.S.C. S: 301.
   You are hereby warned that operation of radio transmitting equipment
   without a valid radio station authorization constitutes a violation of the
   Federal laws cited above and could subject the operator of this illegal
   operation to severe penalties, including, but not limited to, substantial
   monetary forfeitures, in rem arrest action against the offending radio
   equipment, and criminal sanctions including imprisonment. (See 47 U.S.C.
   S:S: 401, 501, 503 and 510.)

   UNLICENSED OPERATION OF THIS RADIO STATION MUST BE DISCONTINUED
   IMMEDIATELY.

   Inspection of your radio equipment revealed that three other channels,
   152.075, 173.900, and 147.050 MHz, were installed in the mobile
   transceivers. The frequency 173.900 MHz is for Federal Government use
   only, and the frequency 147.050 MHz is for use by the Amateur Radio
   Service only. Be advised that RECON has no authority to operate on any of
   these frequencies. 

   You have ten (10) days from the date of this notice to respond with any
   evidence that you have authority to operate granted by the FCC. Your
   response should be sent to the address in the letterhead and reference the
   listed case and document number. Under the Privacy Act of 1974, 5 U.S.C.
   S: 552a(e)(3), we are informing you that the Commission's staff will use
   all relevant material information before it to determine what, if any,
   enforcement action is required to ensure your compliance with FCC Rules.
   This will include any information that you disclose in your reply.

   You may contact this office if you have any questions.

   Thomas N. Van Stavern

   District Director

   San Francisco Office

   Western Region

   Enforcement Bureau

   Attachments:

   Excerpts from the Communications Act of 1934, As Amended

   Enforcement Bureau, "Inspection Fact Sheet," March 2005