Page 95 - Vessel Sanitation Program 2018 Operations Manual

VSP 2018 Operations Manual

6.3.1.2 Filtration Systems

6.3.1.2.1 Filtered (10)
Recirculated RWF water must be filtered.

6.3.1.2.2 Filter Backwash and Cleaning (10)

Filter pressure differentials must be monitored. Granular filter
media must be backwashed until the water viewed through a sight
glass runs clear and at the following frequency:
• WHIRLPOOL SPA and SPA POOL: every 72 hours, or
sooner if the WHIRLPOOL SPA is drained.
• BABY-ONLY WATER FACILITY: daily.
• All other RWFs: at a frequency recommended by the
manufacturer.

For automatic backwashing systems, an individual must be present
in the filter room to ensure that backwashing is repeated as
necessary until the water runs clear.

Cartridge filters must be cleaned according to the manufacturer’s
recommendations.

A written or electronic record of the filter backwashing and
cleaning must be available for review during inspections.

6.3.1.2.3 Granular Filter Inspection, Core Sample Test, and Filter
Change (10)
Granular filter media must be examined for channels, mounds, or
holes. A core sample of the filter media must be inspected for
excessive organic material accumulation using a recommended
sedimentation method.

Inspections and sedimentation tests must be conducted quarterly
for all RWFs.

Inspection method:
Drain the water from the filter housing and inspect the
granular filter for channels, mounds, or holes.

Core sample method:
1. After inspection, take a sand sample from the filter core
and place it in a clear container. A core sample can be
taken by inserting a rigid hollow tube or pipe into the
filter media.
2. Add clean water to the container, cover, and shake.
3. Allow the container to rest undisturbed for 30 minutes.

6.0 Recreational Water Facilities (RWFs); 66