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 a Passive System with Pretreatment Sediment Pond Utilizing a Loose Material Dual product System with Matting and Wattles.
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 SCHEMATIC)
- On a stream of construction run off to treat the water prior to discharge.
- Sedimentation pond utilizes natural gravitation settling. Flocculant enhancement and outlet ﬂow control allow for higher performance over gravitational settling alone.
WHEN SHOULD IT BE INSTALLED?
- Before construction activities begin
- While construction activities are occurring
- To treat water when larger amounts of sediment loads are present
- As a pre-treatment for secondary treatment
- When discharging into a non-high quality water body
WHEN SHOULD IT NOT BE INSTALLED?
- 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?
- Is the natural ﬂocculant material in good condition?
- What is the condition of the matting and wattles?
- Is the water exiting 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?
- Removal of sediment from pretreatment pond
- Addition of natural ﬂocculant when necessary
- Cleaning or replacement of matting and/or wattles
- Natural ﬂocculants in general should not be directly released into civic storm water systems or natural watercourses.
- Discharging water through vegetated areas or additional BMP’s can further reduce turbidity.
- Natural ﬂocculants will completely degrade with enzymatic action.
- Dose rate of chemical is dependent on ﬂow rate and volume of water. See approximate ﬂow/dose table on attached drawing.
Learn more by viewing the corresponding configuration: