Ballast Water Sampling and Sample Analysis for Compliance Control - Global Maritime Transport and Ballast Water Management: Issues and Solutions - page 202

• hoses to connect from the sampling point to the fl ow meter and plankton net as
well as from the sampling bin to the discharge point of the sampled water.

This equipment should be stored on the vessel that the sampling team would not
need to bring it on board which eases the logistics.
The sampling bin should be suffi ciently big that the plankton net can be placed
into the bin at best completely. A sampling bin with dimensions of ca. 100 cm in
height and approximately 50 cm in diameter has proven suitable. This size allows
enough space to ensure that the sampling net is placed in water in the bin when fi l-
tering ballast water so that the maximum of its fi ltering surface is permanently sub-
merged. This is very important to avoid a negative impact of the fi ltered organisms
because of exposure to different stresses during fi ltration (Figs. 13 and 14 ).
As an alternative it may further be considered to permanently install a sampling
arrangement on board so that the PSC only needs to bring the “consumables” on
board, including a new plankton net, sample bottles, buckets etc. Such sampling
skids are developing and tested with fi rst tests being conducted on commercial ves-
sels (IMO 2008 ; Lemieux et al. 2010 ; Schillack 2013 ; Wier 2013 ). However, rigor-
ous on board validation tests are currently lacking.

~ 2-2.5 m

~ 1m

FLOW
METER

INFLOW

Fig. 13 Elements of a
sampling arrangement for
in-line sampling on a vessel
(David 2013 )

OUTFLOW