In our blog post titled “Construction Site Runoff? You have options!,” we introduced HaloKlear Floc Socks. HaloKlear Floc Socks from Dober are sturdy, connected, fabric pouches containing an all-natural flocculant that dissolves slowly as moving water passes over them, creating dense flocs – with great shear strength and low water content – that settle out quickly. Solids are efficiently removed from the water, allowing your crew to focus on their work – instead of on dirty water. In addition, the HaloKlear Floc Socks are extremely flexible, and can be used in active, passive, and semi-passive treatment environments.
This post will outline HaloKlear Floc Sock use for Semi-Passive Treatment of Turbid Water Utilizing a Dual Product System and Dewatering Bags.
WHAT IS ITS PURPOSE?
To clean construction storm water from a pond using a passive system prior to discharge into a regulated water body.
WHERE AND HOW IS IT COMMONLY USED? (SEE FIGURE)
- On a stream of construction run off to treat the water prior to discharge.
WHEN SHOULD IT BE INSTALLED?
- Before construction activities begin
- While construction activities are occurring
- To treat water stored on site
- To treat water when larger amounts of sediment load are present
- After project completion to clean dirty water stored on site
- When discharging into a non-high quality water body
- When high sediment content in inﬂuent water
- When space is limited
WHEN SHOULD IT NOT BE INSTALLED?
- When no method of pumping water is available
- When precise dosing of treatment chemicals is required
- When discharging into a high quality water body
WHAT NEEDS TO BE INSPECTED?
- Is there excessive sediment loading in the pond?
- Are the natural ﬂocculant socks in good condition?
- What is the condition of the dewatering bags?
- Is the efﬂuent water from the system of sufﬁcient clarity?
- Does the residual water test show any remaining natural ﬂocculant in the efﬂuent water?
WHAT MAINTENANCE ACTIVITIES CAN BE EXPECTED?
- Clean sediment out of feed pond
- Check operation of water feed pump
- Changing of natural ﬂocculant socks
- Changing of dewatering bag
- Natural ﬂocculants in general should not be directly released into civic stormwater systems or natural watercourses.
- Discharging water through vegetated areas or additional BMP’s can further reduce turbidity.
- Dewatering bags should be placed on rock, geotextile fabric or vegetative surfaces.
- Natural ﬂocculants will completely degrade with enzymatic action.
- See table on drawing for ﬂow/dose rates of ﬂocculant.
Learn more by viewing the corresponding configuration: