Sampling and Detection of Covert Identified Fuels

TB 703-2

the 1-quart oil sampler. The bulb has a capacity of

may not occur and the concentration may vary and be

approximately 85 milliliters and is equipped with a check

less than optimum.

valve at each end.

6. Sampling and Detection of Covert Identified

Fuels. a. Sampling Equipment. Items listed in Table 3

(a) Separate lengths of plastic tubing

provide a means to take samples of covert identified

are cut and affixed to the valve stems. The tubing on

fuels.

the suction side of the bulb should be of sufficient length

to extend below the surface of the fuel to be withdrawn.

b. Sampling Procedure.

The tubing on the discharge side

(1) The 1-quart oil sampler (item 1, table 3) is

should be of sufficient length to transfer the fuel sample

used to remove fuels to be tested from large bulk

into a graduated cylinder.

storage containers, tank trucks, rail cars, and barges.

The sampler is a weighted metal round 3/4 inch

(b) Lower the suction tubing into the

diameter beaker with a stoppered opening at the top and

container from which a fuel sample is to be taken. The

lowering rope. The lowering rope is attached through

suction tubing should extend below the fuel surface.

the stopper so that with a quick jerk the sampler can be

Fully squeeze bulb and allow product to be drawn into

opened at any point beneath the surface of the product.

bulb chamber. Squeeze bulb to transfer sample to

To take a sample, place the cork in the 3% inch opening

graduated cylinder.

and lower sampler to the bottom of the tank. While

(3) The bung wrench (item 4, table 3) is used

sample is setting on the bottom of the tank, jerk the rope

to open varied type and size closures of 55-gallon steel

to remove stopper and raise sampler at a uniform rate

drums.

of speed such that the sampler is about 3/4 full when

(4) Representative samples are prerequisites

withdrawn from the fuel.

for detection tests and positive identification that

(2) The pressure and circulating bulb (item 2,

sampled fuel was stolen or illegally diverted from

table 3) and the plastic tubing (item 3, table 3) are used

military supply channels. All sampling equipment must

to take samples from small containers, such as 5-gallon

be clean. Since covert identification agents have a

cans, 55-gallon drums, fuel tanks of automotive vehicles

residual characteristic, sampling equipment should be

and from other containers which cannot accept

thoroughly rinsed with unmarked fuel before used to

take samples of fuels from other containers.

Table 3

Item

NSN

Nomenclature

U/I

RIC

Cost

6695-00-359-9944

Sampler Oil, 1-qt. Cap

S9G

$66.00

6640-00-494-3726

Bulb, Pressure and Circulating

S9M

$ 1.20

4720-00-410-9505

Tubing, Tygon Plastic 3/8 inch ID

Length

S9C

$ 1.00

10 ft Length

5120-00-410-4389

Wrench, Bung

$ 6.10

6640-00-889-7089

Cylinder, Graduated Plastic O10MI

S9M

$ 1.90

6640-00-075-5817

Bottle, Screw Top Plastic 402

S9M

* Forward requisitions for this item to the applicable General Service Agency Support Center.

(3) Pour 10-milliliters of the extractant agent

c. Detection Equipment. Item 7, Table 1 and items

(item 7, table 1) into the graduated cylinder previously

5 and 6, Table 3 are required to determine presence of

used to 100 measure milliliters of the sampled fuel. The

covert identification in samples of petroleum fuels.

graduated cylinder should be thoroughly rinsed with

d. Detection Procedure.

unmarked fuel and dried before receiving the extractant

(1) After a sample of the fuel to be tested is

agent. For ease of handling, the extractant agent may

obtained, transfer 100-milliliters of the fuel from the oil

be transferred from the 1-gallon container into a 4-ounce

sampler or pressure and circulating bulb into the

bottle which the investigator can use at the place of test.

100milliliter graduated plastic cylinder (item 5, table 3).

(4) Add the 10-milliliters of extractant agent

(2) Pour the 100-milliliters of fuel from the

to the 4-ounce plastic bottle containing the fuel to be

graduated cylinder into a 4-ounce plastic bottle (item 2,

tested. Place top on the bottle and tighten.

table 4). The bottle will be filled to about one inch of the

top.