Ecosol Storm Pit – Class 2

The EcosolTM Storm Pit (Class 2) (at-source or in-line/end-of-line solution) is an all-in-one, primary and secondary filtration system that helps overcome the need for multiple treatment measures on small catchments where gross pollutants, silts and sediment, and hydrocarbons are targeted for treatment.

Key Features

HOW THE ECOSOLTM STORM PIT WORKS

Ecosol Storm Pit View of Parts storm pit Ecosol Storm Pit – Class 2 Storm Pit Class 2 10L 01Two distinctive systems are available as compact, treatment train systems. The first, the EcosolTM Storm Pit (Class 1) a primary treatment system designed specifically to provide pre-treatment of stormwater run-off either at-source or in-line. The system utilises the process of physical filtration along with ravitational separation to efficiently remove gross pollutants,  edimentation and hydrocarbons.

The second system, the EcosolTM Storm Pit (Class 2) is an all-in-one primary and secondary filtration system that helps overcome the need for multiple treatment measures on small catchments.

For information on the EcosolTM Storm Pit (Class 1) please refer to the Primary Treatment Solutions section of our website.

Ecosol Storm Pit Internal Workings storm pit Ecosol Storm Pit – Class 2 Storm Pit Class 2 10L 02THE ECOSOLTM STORM PIT (CLASS 2)

The EcosolTM Storm Pit (Class 2) is a unique compact at-source or inline stormwater filtration system designed to carry out multiple treatment processes on stormwater runoff within the one compact underground device. In particular it is designed to remove, at predetermined treatable flows, particulate, dissolved and in some cases colloidally bound contaminants such as:

• suspended solids;
• heavy metals;
• oil & grease;
• hydrocarbons;
• nitrogen; and
• phosphorous.

Ecosol Storm Pit Internal Section View storm pit Ecosol Storm Pit – Class 2 Storm Pit Class 2 10L 03In developing this innovative stormwater treatment system careful consideration has been given to durability, longevity, cost, and maintainability. Key commercial technical features include:

• widely available chemically conditioned filtration medias;
• a system capable of achieving low pollutant discharge levels;
• low visual impact and energy footprint;
• designed hydraulics with proven performance and longevity;
• scalable design; and
• cost effective maintenance regime.

Ecosol Storm Pit Internal Side View storm pit Ecosol Storm Pit – Class 2 Storm Pit Class 2 10L 04The system is ideally suited for smaller catchments such as commericial car park applications with inlet flows ranging from 4 – 22L/s, it provides a compact, cost efficient treatment solution specifically targeting suspended solids, heavy metals, total phosphorous and nitrogen including free floating oils and grease. Housed in a pre-cast concrete pit, the unit consists of a primary treatment inlet litter basket designed to capture and retain all particles larger than 200 micron and then incorporates a series of internal baffles for retention of hydrocarbons in a spill situation and the retention of particles (> 93 micron). It also includes a unique patented multi barrier media filter for secondary treatment

The EcosolTM Storm Pit (Class 2) Typical Configuration

Eco Storm Pit Class 2 Benefits storm pit Ecosol Storm Pit – Class 2 Ecosol Storm Pit Class 1 Benefits1

 

The EcosolTM Storm Pit (Class 2) Key Features and Benefits

 

 

Under Construction

 

Key Dimensions

The EcosolTM Storm Pit product range has been designed to help practitioners meet today’s stringent water quality objectives. Whether installed at-source, in-line, or in-line the system is adaptable to most applications.

THE ECOSOLTM STORM PIT (CLASS 2) KEY DIMENSIONS

This system is also designed to target gross pollutants, coarse sediment and hydrocarbons however it is also designed to remove, at pre-determined treatable flows, particulate, dissolved and in some cases colloidally bound contaminants such as:

  • suspended solids;
  • heavy metals;
  • nitrogen; and
  • phosphorous.

The below table highlights the key dimensions for the EcosolTM Storm Pit (Class 2) product series.

EcosolTM Storm Pit (Class 2) Key Dimensions.

Please Note: For optimal performance this system requires a minimum drop from the grated inlet or inlet pipe invert to the outlet pipe invert level of 810mm.

The below table provides general information of the typical EcosolTM Storm Pit (Class 2) multi barrier media bed, replacement material volumes and approximated bed dimensions.

EcosolTM Storm Pit (Class 2) Key Multi-Barrier Filter Media Dimensions and Volumes

Collection Efficiencies

In recent years modern Water Sensitive Urban Design (WSUD) objectives and principles now applied to most urban development’s require more onerous water quality objectives (WQO’s) specifically targeting the removal of suspended solids, nitrogen, phosphorus and heavy metals.

The EcosolTM Storm Pit (Class 2) provides engineers with a compact treatment measure that when implemented with other measures such as rain gardens or swales will achieve the necessary Water Quality Objectives. The EcosolTM Storm Pit (Class 2) is the ideal treatment solution for applications where space is limited.

THE ECOSOLTM STORM PIT (CLASS 2) POLLUTANT REMOVAL EFFICIENCIES

1Typical pollutant removal efficiencies based on results derived from the independently tested EcosolTM Litter Basket and EcosolTM Storm Pit (Class 1) published performance data.
2Typical nitrogen and phosphorous removal efficiencies derived from international work undertaken on the performance of porous polypropylene, Clinoptilolite, and laterite as per references described in section 3.0 of the product technical specification.
3Typical removal efficiencies derived from the Port of Townsville Pilot Program testing (Athanasiadis et al., 2014). The removal efficiency depends heavily on the arsenic speciation (arsenite or arsenate).


Hydraulic Specification

Treatable Flow Rate (TFR) is defined as the maximum flow rate through the EcosolTM Storm Pit before flows surcharge and commence by-passing the system untreated. The TFR is constrained by the friction capacity and size of the outlet conduit and the percentage of unit fill. For the purpose of assisting designers we have adopted conservative values and recommend designing the system with an outlet at 1% gradient to achieve optimal capture efficiencies and maximum treatable flow rates. Further each system has been designed specifically to cater for peak flow by-pass conditions in the event that the system is full of contaminants and a significant storm event is occurring. This fail safe by-pass eliminates the risk of potential localised flooding.

THE ECOSOLTM STORM PIT (CLASS 2) HYDRAULIC SPECIFICATION

The EcosolTM Storm Pit (Class 2) is designed to treat stormwater runoff for typical urban catchments of 100 – 750m2 based on the product selection and on a 100% impervious catchment area. The system provides both primary and secondary treatment within the one compact underground device thereby reducing the space and cost of downstream tertiary treatment measures.

EcosolTM Storm Pit (Class 2) Hydraulic Specification

Maintenance

One of the key advantages of the EcosolTM Storm Pit (Class 2) is that a small vacuum truck can easily and efficiently remove all captures pollutants from both the primary litter basket and secondary treatment wet sump silo and the multi barrier media bed. This eliminates any risks associated with manually handling captured pollutants.

As the primary litter basket in the EcosolTM Storm Pit (Class 2) is a dry storage basket there is a reduced likelihood of captured contaminants causing any significant adverse environmental impact or nuisance (such as odors and putrefaction).

Cleaning and Maintenance

As with all filtration systems, the EcosolTM Storm Pit should be cleaned regularly. The cleaning frequency, and the cost, depends heavily on the surrounding environment, the unit’s proximity to a waste facility and the quality and quantity of stormwater run-off conveyed to the system.

Ecosol has a very competitive cleaning service. After each clean we provide a report detailing the volume and type of pollutants removed. We believe that it is in your best interests for Ecosol staff to clean and maintain the unit, not only because we are specialists, but also because proper monitoring and maintenance enhances the unit life significantly.

Should you use another company to clean the unit, or undertake this work yourself, we request that it be conducted according to Ecosol’s specifications. Otherwise, you may invalidate your warranty, as damage caused by inappropriate cleaning procedures is not covered. The advantages of using Ecosol to clean and maintain your unit are that you get:

  • regular inspections of your unit;
  • a comprehensive cleaning service with removal and disposal of all captured pollutants;
  • a detailed report provided on completion of each clean;
  • trained and experienced staff; and remedial work completed, if required.

The table below give a broad guideline about the number of cleans required annually for each treatment element within the EcosolTM Storm Pit (Class 1) and EcosolTM Storm Pit (Class 2).

EcosolTM Storm Pit Maintenance Frequencies

Applications

The EcosolTM Storm Pit (Class 2) can be installed either at-source or in-line on pipes ranging in diameter from 100mm up to 375mm, usually in small commercial and high-density catchments ranging in size from 0.010Ha to 0.075Ha. For larger pipe sizes contact your local Ecosol office.

THE ECOSOLTM STORM PIT (CLASS 2) TYPICAL APPLICATIONS

The EcosolTM Storm Pit (Class 2) is a unique compact at-source or in-line stormwater filtration system designed to carry out multiple treatment processes on stormwater runoff within the one compact underground device. In particular it is designed to remove, at pre-determined treatable flows, particulate, dissolved and in some cases colloidally bound contaminants.

Typically, the EcosolTM Storm Pit (Class 2) is designed for trafficable loadings and is located in commercial car parks, high-rise residential apartment complexes, hardstand areas in shopping centre car parks and industrial estates.

Typical applications include: 

  • light industrial estates;
  • mining and bulk handling facilities;
  • Industrial and commercial sites such as car parks and shopping centres;
  • Commercial wash down bays such as truck stops and council depots; and
  • high density housing estates.

This systems is often a preferred choice in developments where site space constraints prohibits the installation of multiple treatment measures. It also provides an efficient solution for pre-screening of stormwater run-off prior to onsite detention or rain water harvesting systems.

Ecosol Storm Pit Technical Specifications

EcosolTM Storm Pit -  Technical Specifications


Ecosol Storm Pit Maintenance Guide

EcosolTM Storm Pit -  Maintenance Guide


 

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