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4-2.1 Sample Points
Normally, the quality of product shipped to the TPT has been proven at the source and again upon arrival at the point
where it is pumped to the associated pipeline feeding the TPT. Facilities at the TPT permit sample taking as follows:
a.
A sampling assembly (Fig. 2-22 and para. 2-4.8) is installed in the header feeding the TPT switching manifold
from the associated pipeline or other delivery system. The primary use of the sampling assembly is to check incoming
fuel and establish the arrival of the interface between batches of different specification fuel. It can also be used to spot
sample and check the quality of incoming fuel during the receiving period as desired by the operating authority.
b.
A sample point is located in the discharge line of each filter separator (Fig. 2-21 and para. 2-4.7a.4). The
primary purpose of this sample point is to check the quality and make sure no water is carried over to the dispensing
assembly.
c.
There are no facilities to safely take composite samples from the fabric collapsible tanks. A bottom sample may
be taken from the drain connection to check the accumulation of BS&W (bottom sediment and water). A top sample may
be taken when the hoseline pumps connected to the tanks are in operation through the vent petcock and hose connection
on the pump discharge elbow if handled carefully.
4-2.2 Sampling
a.
Extreme care must be taken when drawing samples. This is particularly true when drawing a sample from a
flowing line under pressure. The following warnings and cautions apply to all sampling under a, b, c, and d, below.
WARNING
Wear safety goggles, long sleeves, and approved gloves when drawing samples. If fuel
comes in contact with skin, wash off with water immediately. Warm water is most effective.
WARNING
When drawing samples, station a fire extinguisher near at hand.
WARNING
If fuel is spilled and accumulated, wash down the area to remove the fire hazard caused.
WARNING
No smoking within 100 ft. of any sampling operation.
CAUTION
Have an assistant or helper stand by to assist with any trouble when drawing a sample.
b.
The sampling assembly (Fig. 2-22) should be operated as follows:
1.
Place containers under the drain holes of the sampling table to catch any spilled fuel.
4-3
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