4-2.4 Sampling and Test Frequency - Cont'd .
or more samples have the same visual and gravity characteristics, the flow is cut to the appropriate fuel unit and flow to
the contaminated fuel unit is stopped.
Sampling to Assure Quality to the Dispensing Assembly. Samples from the water detector kit adapter (Fig. 2-21,
para. 4-2.1 b) downstream of each filter separator are taken to assure that the filter separators are performing properly.
The testing kit (para. 4-2.3a) is utilized for this purpose. It is recommended that samples be drawn and tested as follows:
Once each four (4) hours of operation of dispensing assembly
Three checks at 15 minute intervals after filter separator is first put in operation or whenever there has been a
filter change or an upset in operations.
Sampling from Tank Too via Pumps. It is recommended that samples be drawn and checked as follows.
Once per day
Whenever there is suspicion of contamination
Whenever that particular tank or module is to be transferred to another module in same TPT
Whenever that particular tank or module is to be transferred to the associated pipeline system, another TPT, or
any other major bulk movement.
Sampling from Tank Bottom Drain. It is recommended that samples be drawn and checked as follows:
Once per week
Whenever there is suspicion of contamination by water or other contaminates
Prior to transferring tank contents elsewhere
Contaminated tank bottoms should be drawn off and disposed of prior to transferring all of a
tank to another tank, to fuel dispensing, or to the associated pipeline. Under no conditions
should tank bottoms be dispensed to user vehicles.
4-2.5 Utilization of Laboratory Facilities
It is recommended that the laboratory facilities noted in para. 4-2.3b be utilized under the following circumstances:
When the quality of a fuel is questioned.
When a fuel cannot be classified.
To assist in determining action to be taken as regards the content of the contaminated fuel module.