30 C.F.R. § 250.1742 What other methods can I use to verify that a site is clear?
Title 30 - Mineral Resources
If you do not trawl a site, you can verify that the site is clear of obstructions by using any of the methods shown in the following table: [67 FR 35406, May 17, 2002; 67 FR 44266, July 1, 2002]
Title 30: Mineral Resources
PART 250—OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF
Subpart Q—Decommissioning Activities
Site Clearance for Wells, Platforms, and Other Facilities
§ 250.1742 What other methods can I use to verify that a site is clear?
------------------------------------------------------------------------ If you use_ You must_ And you must_------------------------------------------------------------------------(a) Sonar................... cover 100 percent of Use a sonar signal the appropriate with a frequency of grid area listed in at least 500 kHz. § 250.1741(a).(b) A diver................. ensure that the Ensure that the diver visually diver uses a search inspects 100 pattern of percent of the concentric circles appropriate grid or parallel lines area listed in spaced no more than § 250.1741(a). 10 feet apart.(c) An ROV (remotely ensure that the ROV Ensure that the ROV operated vehicle). camera records uses a pattern of videotape over 100 concentric circles percent of the or parallel lines appropriate grid spaced no more than area listed in 10 feet apart. § 250.1741(a).------------------------------------------------------------------------
