Bunker Sampling

Why Should you sample when Bunkering ?

• Good Practice
• Sampling should prevent system contamination from Diesel or Sea water

What Tests should be carried out ?

• Visual check for rust or other contamination
• Smell – for diesel contamination
• Conductivity for sea water contamination
• Free Chlorine – to check whether water requires chlorination post bunkering &

to make sure you are not getting super chlorinated water.

Sampling & Testing MUST be carried out before transferring water
to the storage tanks

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Measuring free chlorine

1. Rinse out the two vials with water to be tested
2. Fill both comparators cells to approx. 10ml mark
3. Add the contents of one DPD(free) powder pillow to one vial
4. Cap and invert gently to dissolve
5. Place this comparator cell into the right hand side of comparator
6. Place the other comparator cell into the left hand side of the comparator
7. Hold comparator to a source of light (preferably natural light)
8. Rotate disc until colour match is obtained
9. Read of the value on the right aperture of the comparator
10. Record result.

Reading must be taken within 1 min of adding the sachet

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Temperature Measurement

• Cold water temperature – within 2 minutes

• Hot water temperature – within 1 minute

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Cold & Hot Water TVC (Quantidisc)

• Measures background bacteria

• Shows the conditions of the water

• Sterile process

•

Theoretical Scale

• 40 hours

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1:38 PM

Cold & Hot Water TVC (Quantidisc)

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No. of positive wells

TVC MPN

No. of positive wells

TVC MPN

0

<1.8

1

2.0

26

73.4

2

4.1

27

77.7

3

6.2

28

82.1

4

8.3

29

86.8

5

10.5

30

91.6

6

12.8

31

96.8

7

15.1

32

102.2

8

17.4

33

107.9

9

19.8

34

113.9

10

22.3

35

120.4

11

24.8

36

127.3

12

27.4

37

134.7

13

30.1

38

142.7

14

32.9

39

151.4

15

35.7

40

160.9

16

38.6

41

171.5

17

41.6

42

183.3

18

44.6

43

196.6

19

47.8

44

212.0

20

51.1

45

230.3

21

54.5

46

252.6

22

58.0

47

281.3

23

61.6

48

321.9

24

65.4

49

391.2

25

69.3

50

>391.2

Cold & Hot Water Ecoli & Coliform

•

Positive or Negative Test

•

Sterile Testing required

•

24 hours

1:38 PM

Recommended Sample Matrix

Conductivity,

Visual

Inspection

pH.

Conductivity,
Free Chlorine

Temperature

TVC

Quanti-disc

E-coli

Coliform

Disinfection Flushing Volume Inspection

Laboratory

Chemical

test

BUNKERED

WATER

Each Time

Weekly

SICKBAY COLD

Daily

Daily

Weekly

Monthly

SICKBAY HOT

Daily

Weekly

Monthly

GALLEY COLD

Monthly

Monthly

Monthly

Quarterly

Annually

GALLEY HOT

Monthly

Monthly

Quarterly

Annually

OTHER LEVELS

COLD

Quarterly

Quarterly

Quarterly

OTHER LEVELS

HOT

Quarterly

Quarterly

LITTLE USED

OUTLETS

Weekly

SHOWER

Monthly

CALORIFIER

DRAIN

Weekly

Annually

STORAGE

TANK

Annually

OWM Daily Monitoring Spreadsheets

OWM Monthly Review Sheets

Group Exercise 2

Lets see if you have listened

1:38 PM

Practical Exercise 1

The following techniques will help you

interpret Quanti-Disc results correctly:

1. Read the Quanti-Disc sample with
a viewing cabinet or in a dark room
to avoid ambient light interference.

2. Read Quanti-Disc results with
a 6-watt, 365-nm UV lamp.

3. Keep the UV lamp at least 5 inches
(13 cm) from the disc. If the UV lamp is
too close, every well in the Quanti-Disc
may appear to be positive.

4. Count the number of fluorescing wells.
Any fluorescence visible within a well is
considered positive. Refer to the MPN table
to convert positive wells to MPN per mL.

5. Do not compare wells within the
same sample. Always use a negative
control for a reference.

Quanti-Disc

Reading Guide

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Quanti-Disc

Reading Guide

Test

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A

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A =
29

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B

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B =
12

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C

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C =
9

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D

1:38 PM

D =
25

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Practical Exercise 2

•

Chlorine Testing

•

pH Testing

•

Conductivity Testing

•

Hygiene Testing

Not a test – Have a play with the equipment

Any questions please ask

1:38 PM

The Final Slide!

Certificates

Thank You

Any Questions?

1:38 PM