In cases involving alleged bypass of oil filtration equipment, samples may be sent to the MSL to determine ___.
Path of discharge
What three tests can MSL run on oil samples?
Gas Chromatography (GC)
Gas Chromatography-Mass Spectrometry (GC-MS)
Infrared Spectrometry (IR)
What type of gloves should be worn when taking oil samples?
Nitrile
What type of tape used to seal sample jars?
Electrical
Swipe samples should be taken with ___.
4” x 4” PTFE pad
Which samples should be taken first?
Spill (due to weathering)
Minimum number of samples in order to run a comparison at MSL
3 samples
What three locations should spill samples be taken from?
Center, leading edge, trailing edge
Spill samples should be taken where the oil appears ___ .
Heaviest
McGill sheen net samples are highly susceptible to ___.
Biodegradation
Source samples should be taken from any facility or vessel that had ___.
Opportunity to cause the spill
Where should you take samples from each suspected source?
All tanks and bilges
As oil samples are subject to weathering even after collection, samples should be sent to the MSL when?
-As soon as possible
-Immediately
-As soon as practical
-Within specified time
As soon as possible
Oil samples should be kept in a ___,___ place.
Cool, dark
Optimal conditions for storing samples at the unit are in what type of refrigerator?
Explosion proof
A ___ storage fridge may be used instead of an explosion proof fridge if conditions are appropriate.
Flammable
The refrigerator temperature for storing oil samples should be___.
40-42 degrees F
MSL does not require the use of ___ when taking samples.
-Chain of Custody Labels
-Paper tubes
-Electrical tape
-Sorbents
Chain of custody labels
Cases sent to the MSL shall use what number for tracking on the Chain of Custody, Letter of Request, and sample jar labels?
MISLE Incident Investigation Activity number (IIA).
What is the most important document related to samples sent to MSL?
Chain of Custody
Sample labels should be copied to the chain of custody___
-word for word
-you can correct spelling
-verbatim
-add additional detail
Verbatim
If unit policy states the watch stander has custody of samples in the storage fridge, the Chain of Custody___ need to be signed each time the watch changes.
Does not
What two documents should be shipped with the oil samples?
Chain of custody and letter of request
The letter of request should be signed by a unit representative with ___.
“By Direction” signing authority