APPENDIX A

Each detector station can support two sensors. The sensors should be mounted 6–12 in above the deck. Detector areas and number and position of fixed sensors follow:

Core Processing Area

Sensor 1: Below the sampling table next to the working half storage rack.

Sensor 2: Below the description table.

Core Receiving Platform

Sensor 1: Mount on handrail at the forward end of the platform next to the outdoor storage rack.

Sensor 2: Mount on the handrail at the midpoint of the platform.

Core Entry

Sensor 1: Mount at the base of the aluminum core rack.

Sensor 2: Mount beneath the splitting table.

Core Catcher Bench

Sensor 1: Mount on the handrail at the aft end of the core receiving platform.

Sensor 2: Mount beneath core catcher bench.

Lower 'tween Deck Landing

Sensor 1: Mount inside the lower 'tween core refrigerator at the base of the unistrut shelving.

Hold Deck Landing

Sensor 1: Mount inside the hold core refrigerator at the base of the unistrut shelving.

Sensor 2: Mount at the bottom of the stairwell.

Fresh-Air Intake Plenum

Sensor 1: Mount inside the fresh air intake plenum where the air enters the A/C on the main deck.

Sensor 2: Mounted on the forward end of the core receiving platform.

Rig Floor

Sensor 1: Mount at the base of forward starboard tugger.

Sensor 2: Mount at the base of aft starboard tugger.

Post warning signs at the entrance(s) to potential H₂S areas during operations at sites where H₂S may be encountered. Use the following text on the warning signs:

WARNING--HAZARDOUS AREA

HYDROGEN SULFIDE H₂S

UNAUTHORIZED PERSONNEL KEEP OUT

NO SMOKING

Warning signs are to be posted in the following areas:

• Rig floor,
• Core receiving platform,
• Core laboratory—in all areas where cores will be processed,
• Core storage reefer—including reefer entrance(s),
• Bottom of core laboratory stairwell—H₂S gas may accumulate in that area, and
• Living quarter exits that are entrances into designated H₂S danger areas—all deck levels.

Wind socks are mounted on the following areas:

• Ship's bow,
• Crane no. 1,
• Crane no. 2, and
• Crane no. 3.

Bright color streamers are located in the following areas:

• Along the catwalk aft of crane no. 2,
• Under the rig floor on the mezzanine deck, and
• Along the port side of the core-receiving platform.