Page 81 - Vessel Sanitation Program 2018 Operations Manual

VSP 2018 Operations Manual

WATER TANK(s) must be cleaned and disinfected.

5.3.4.1.2 Inspection (08)
POTABLE WATER TANKS must be inspected, cleaned, and
disinfected at least every 2 years.

5.3.4.1.3 Record Retention (08)
Documentation of all inspections, maintenance, cleaning, and
DISINFECTION must be maintained for 12 months and must be
available for review during inspections.

Records must include method of DISINFECTION, concentration
and contact time of the DISINFECTANT, and a recorded
HALOGEN value of less than or equal to 5 ppm before the tank is
put back into service.

5.3.4.1.4 Disinfection Residual (07 C)
DISINFECTION after potential CONTAMINATION must be
accomplished by increasing the free residual HALOGEN to at least
50 MG/L (ppm) throughout the affected area and maintaining this
concentration for 4 hours or by way of another procedure
submitted to and accepted by VSP.

In an emergency, this contact time may be shortened to 1 hour
by increasing free residual HALOGEN to at least 200 MG/L
(ppm) throughout the affected area.

Refer to Annex 13.6 for DISINFECTION method examples.

5.3.4.1.5 Documentation (08)
The free HALOGEN residual level must be documented.

5.3.4.1.6 Flush (08)
The disinfected parts of the system must be flushed with
POTABLE WATER or otherwise dechlorinated until the free
residual HALOGEN is ≤5.00 MG/L (ppm). The free HALOGEN
test result must be documented.

5.3.5 Potable Water Tank Disinfection Methods

5.3.5.1 Method for Disinfecting Filled Tanks (08)
DISINFECTION must be accomplished by increasing the free residual
HALOGEN to at least 50 MG/L (ppm) throughout the tank and
maintaining it for 4 hours. Maintain a pH value of 7.8 or less. The
DISINFECTION concentration and contact time must be documented.

5.0 Potable Water; 52