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4.
Roofing down spouts, footer drains or floor drains tied into system: notify owner to relocate connection
downstream of system
5.
Check valve is stuck in closed position: repair or replace check valve
Sampling
Proper sampling techniques are important to ensure that the results are representative of system performance. To ensure
an accurate sample is collected, Norweco recommends that a sample port be installed immediately downstream of the
treatment system. The sample port should allow a free falling sample to be collected. Sample ports should be cleaned
before attempting to collect a sample.
If a sample port has not been provided, effluent from the Bio-Film Reactor should be evaluated by collecting a sample
from the liquid above the Reactor Elements. The sample should be collected from 2-3" below the liquid surface to avoid
collection of any floating solids that could interfere with results.
If a sample port has not been provided, effluent from the Phos-4-Fade filter should be evaluated by collecting a sample
from the liquid above the Phos-4-Fade media. The sample should be collected from 2-3" below the liquid surface to avoid
collection of any floating solids that could interfere with results.
Samples of the UV system effluent must be collected from a sample port installed downstream of the UV disinfection system.
If an influent sample is required, the influent sample should be collected from the pretreatment chamber.
PROGRESS THROUGH
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©MMXXII NORWECO, INC. NORWALK, OHIO U.S.A / REV. 10/2022
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