This is not a mandatory form, but a typical Shipyard Competent Person Log. [29 CFR 1915.7(d)] 

SHIPYARD COMPETENT PERSON LOG   Job No. Vessel /Type: Location/Berth: Marine Chemist Cert# SCP Name: Date:
Space/Cargo	Operation	Time	Test Results			Instructions/Designation
			O2%	LEL	Toxics
Forward Rake, Void	Inspection & cold work	0510	21	< 1%	NA	SAFE FOR WORKERS NOT SAFE FOR HOT WORK 1. Maintain Ventilation
1 Port, Diesel	Inspection & cold work	0515	21	< 1%	NA
1 Starboard, Diesel	Inspection & cold work	0520	21	< 1%	NA
2 Port, Diesel	Inspection & cold work	0525	21	< 1%	< 0.5
2 Starboard, Diesel	Inspection & cold work	0530	21	< 1%	< 0.5
3 Port, F.O.	Inspection & cold work	0540	21	2%	3 ppm	ENTER WITH RESTRICTIONS Wear 1/2 mask OV respirator Maintain Ventilation
3 Starboard,  F.O.	Inspection & cold work	0545	21	3%	4 ppm
4 Port,  F.O.	Inspection & cold work	0550	21	< 1%	< 0.5	SAFE FOR WORKERS SAFE FOR HOT WORK 1. Maintain Ventilation 2. Maintain Firewatch
4 Starboard,  F.O.	Inspection & Hot Work	0600	21	< 1%	< 0.5
5 Port, Diesel	Inspection & Hot Work	0610	21	< 1%	NA
5 Starboard, Diesel	Inspection & Cold Work	0615	21	< 1%	NA
Aft Rake, Void	Hot Work	0630	19.8	< 1%	NA

Specific Toxics & PEL/TLVs (List) Benzene in gasoline PEL = 1.0 ppm, TLV = 0.5 ppm
Safe Entry Conditions:	Oxygen = 19.5 to 22%	LEL = < 10%	Toxics = < PEL/TLV

Standard Designations:
	SAFE FOR WORKERS	NOT SAFE FOR WORKERS	ENTER WITH RESTRICTIONS
	SAFE FOR HOT WORK	NOT SAFE FOR HOT WORK	SAFE FOR LIMITED HOT WORK
*Only Generators Use Diesel and Main Engine during Maneuvers