Appendix B

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Marine Chemist Certificate - Serial No.

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Survey Requested By    Vessel Owner or Agent      Date

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Vessel      Type of Vessel      Specific Location of Vessel

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Last Three Cargoes      Test Method      Time Survey Completed

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In the event of any physical or atmospheric changes adversely affecting the Standard Safety Designations assigned to any of the above spaces, or if in any doubt, immediately stop all work and contact the undersigned marine chemist.

Standard Safety Designations

Safe for Workers

Means that in the compartment or space so designated: (a) the oxygen content of the atmosphere is at least 19.5 percent and not more than 23 percent by volume; and that, (b) toxic materials in the atmosphere are within permissible concentrations; and that (c) the residues cannot produce toxic materials under existing atmospheric conditions while maintained as directed on the marine chemist's certificate.

Not Safe for Workers

Means that in the compartment or space so designated, the requirements of Safe for Workers have not been met.

Safe for Hot Work

Means that in the compartment so designated (a) oxygen content of the atmosphere is at least 19.5 per cent and not more than 23 percent by volume, except for inerted spaces or where external hot work is to be performed; and that, (b) the concentration of flammable materials in the atmosphere is below 10 per cent of the lower flammable limit; and that, (c) the residues cannot produce a higher concentration than permitted by (b) under existing atmospheric conditions in the presence of fire and while maintained as directed on the marine chemist's certificate; and further, that (d) all adjacent spaces containing, or having contained, flammable or combustible materials have been cleaned sufficiently to prevent the spread of fire; or are satisfactorily inerted; or, in the case of fuel tanks or lube oil tanks, or engine room, or fire room bilges, have been treated in accordance with the marine chemist's requirements.

Not Safe for Hot Work

Means that in the compartment so designated, the requirements of Safe for Hot Work have not been met.

Safe for Repair Yard Entry

Means that the compartments and spaces of the flammable cryogenic liquid carrier so designated (a) have been tested by sampling at remote sampling stations, and results indicate the atmosphere tested to be above 19.5 per cent oxygen and less than 10 percent of the lower flammable limit; or (b) the compartments are inerted.

Qualifications

Unless specifically approved in this certificate, transfer of ballast or manipulation of valves, closure equipment tending to alter conditions in pipe lines, tanks, or compartments subject to gas accumulation requires inspection and endorsement, or reissue of the certificate for the spaces so affected. All lines, vents, heating coils, valves and similarly enclosed appurtenances shall be considered "Not Safe" unless otherwise specifically designated.

Chemist's Endorsement

This is to certify that I have personally determined that all spaces in the foregoing list are in accordance with the Gas Hazard Control Standard TP 3177, and I have found the condition of each to be in accordance with its assigned designation.

This Certificate is based on conditions existing at the time the inspection herein set forth was completed and is issued subject to compliance with all qualifications and instructions.

Signed ________________________________________________________
Marine Chemist

The undersigned acknowledges receipt of this Certificate under section 10, Gas Hazard Control Standard, and understands the conditions and limitations under which it was issued.

Signed ________________________________________________________

Name

Company

Date

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