(321) 637-7552 ​​info@suntreetech.com
Suntree Technologies Inc
  • Home
  • Products
  • About Us
  • Projects
  • Contact & Requests
  • BMP Calculators
"The GISB is an Economical and Versatile Filter Solution for use in ​Grated Catch Basins with Low Cost Maintenance & Proven Performance.”

​
​Grate Inlet Skimmer Box​™ (GISB™​
)
​
 

The Grate Inlet Skimmer Box™ (GISB™) is a specialized inlet filter specifically for use in grated catch basins. The unit is made of marine grade fiberglass and stainless steel to ensure longevity and durability. During a storm event, all incoming runoff passes through the internal skimmer tray and into contact with a Stormboom™. Stormwater and solid material then fall into the lower section of the skimmer box where small sieve sized filters capture and retain all solids. Turbulence deflectors within the filtration box act to calm the water and allow for a greater removal efficiency. Purified stormwater passes through the catch basin allowing the filtered materials to dry after each storm.
Picture

Benefits​​​
  • Optimized filtration: multiple sieve size screens enhance filtration
  • Built strong: fiberglass and stainless steel construction​
  • Full capture for trash TMDL's
  • Bypass openings prevent clogging issues
  • Will not impede inlet flow
  • No need for confined space entry
  • Removes more than 80% TSS
  • Easy vacuum truck servicing

    ​
GISB Highlights:​
  • Durable UV coated fiberglass body with stainless steel filter screens. Engineered to be a permanent component of the infrastructure.
  • Multiple sieve size screens result in efficient pollutant removal without the need for bag or cartridge filters. 
  • Non scouring design: turbulence deflectors calm rushing water inside the filter screen system to prevent sediment scouring.
  • Servicing is quick and simple via vacuum truck with no risk or damage to screens.
Picture
LEED Credit Applicable:
6.2           Stormwater Design, Quality Control​

Operation
​

To better understand the functionality of the GISB™, ​please view the accompanying video to see the entire system in action.
Stage 1: Hydrocarbon Absorption

Stormwater enters the inlet immediately coming in contact with a StormBoom™ which absorbs floating hydrocarbons. The StormBoom™ can be outfitted with multiple types of biosorption activated media and is installed around the top perimeter.
Picture
Stage 2: Fine Particulate Filtering

Throughout the storm event, water continues to come in contact with the StormBoom™ and then flows into the lower filtration chamber adjacent to the fine sieve size screens. The fine sieve size screens filter out extra fine particulates such as phosphates and sand.
Picture
Stage 3: Medium Particulate Filtering

As the storm intensity increases, the water level in the GISB™ rises to a level adjacent with the medium size sieve screens and turbulence deflector. The medium size sieve screens provide additional flow with less chance of clogs or obstructions forming. The turbulence deflector reduces the turbidity in the lower chamber and prevents scouring.
Picture
Stage 4: Coarse Particulate Filtering

If the storm intensity becomes a high flow event, the water level in the GISB™ rises to a level adjacent to the coarse sieve size screens above the turbulence deflector. The coarse screen provides additional filtered flow with a far less chance of obstruction than the fine or medium sieve size screens and is designed to capture floating debris like foliage and trash.
Picture
Stage 5: Filter Bypass

If the stormwater flow rate is extreme or the unit is full where the flow rate exceeds flow through all the screens, the water will bypass the screens by passing through skimmer protected openings at the top of the GISB™.
Picture
Stage 6: Dry State Storage

After the storm event has subsided, the stormwater will drain from the GISB™ completely leaving all collected debris suspended in the screen system to dry until removed during routine service. The dry state storage contains the nutrient pollutant load while also working to prevent septic water, the breeding of mosquitoes and nutrient leaching.
Picture

Service & Maintenance
​

Service Information

The GISB™ is recommended to be inspected and serviced quarterly. However, site conditions can affect the service interval to be a longer or shorter time period. The maximum flow capacity of the unit will be restored after each servicing no matter the times serviced due to durable stainless steel construction. Service can be carried out either manually or via vacuum truck.
​​
Manual Service Procedure
  • Remove the grate
  • Remove the skimmer tray
  • Cut zip ties, remove StormBoom™ and dispose
  • Remove and dispose of debris in skimmer tray
  • Attach new StormBoom™ to skimmer tray with zip ties
  • Remove filtration box, dispose of debris and brush screens
  • Replace filtration box into inlet, replace skimmer tray into
    ​filtration box and replace grate​
    ​
Picture
Vacuum Service Procedure
  • Remove the grate
  • Remove the skimmer tray
  • Cut zip ties, remove StormBoom™ and dispose
  • Remove and dispose of debris in skimmer tray
  • Attach new StormBoom™ to skimmer tray with zip ties
  • Reach into filtration box and suction out debris and clean
    ​screens with spray wand or brush
  • Replace filtration box into inlet, replace skimmer tray into
    ​filtration box and replace grate
Picture

StormBoom™ (Optional)
​

StormBoom™ Absorption Media

A StormBoom™ is a hydrocarbon absorption media sock used within stormwater BMP's to remove chemicals and hydrocarbons from stormwater runoff. Developed into four distinct types, StormBoom's™ can cover a wide spectrum of pollutants suited for an array of stormwater applications.

Benefits
  • Hydrocarbon absorption booms designed specifically for stormwater applications
  • Available in a variety of absorption materials and blends
  • Absorbs oils on contact
  • Economical low cost media
  • Easy installation, simple to service
  • Resists clogging
    ​
    ​
Picture
Type 1: Hydrophobic Treated Cellulose

A wide spectrum absorbent with a large sieve size covering for greater stormwater penetration. Hydrophobic treated cellulose filler is made from reclaimed paper mill by-products and certified 100% recycled material. Absorbed liquids are drawn into the cellulose fibers via capillary action and are encapsulated.

​​
Type 2: Melt Blown Polypropylene

A non biodegradable large sieve size covering filled with shredded melt blown polypropylene. This media has indefinite lifespan with absorption limited to hydrocarbons and oils.

​​
Type 3: 50 - 50 Types 1 & 2 Blend

50 - 50 blend of Hydrophobic Treated Cellulose and Melt Blown Polypropylene with a large sieve size covering. This media blend offers wide spectrum absorption with a particular emphasis on hydrocarbons.

​
Type 4: Polymer Crumb Filler

A non biodegradable fine sieve size covering filled with polymer crumb filler. This media will not absorb water and is limited to hydrocarbon absorption via a chemical bond with hydrocarbon molecules on contact. This media is recommended for use near the outflow.

Related Products
​

Picture
StormBoom Media™

A StormBoom™ is an absorption media sock used within BMP's to remove hydrocarbons and harmful chemicals from stormwater. Designed and developed into four distinct types, StormBoom's™ cover a wide spectrum of pollutants for an array of applications.
Learn More

Technical Information

Brochure
Service Manual
​

Testing Reports

​Inlet Filters TSS Retention Testing
​Inlet Filters Removal Efficiency Chart
Inlet Filter Inserts Report - UC Irvine
Inlet Filters - Pond Restoration Project
​GISB Pollutant Removal Testing
​GISB Lab Testing
GISB Removal Efficiencies Evaluation
​
GISB Removal Efficiencies Report

Picture
798 Clearlake Road, Suite 2
Cocoa, Florida 32922
Picture

​​321.637.7552
 
Picture

​​​info@suntreetech.com 
Picture




​Products
​Proudly
Picture
© 2018 Suntree Technologies Inc
​ Privacy Policy | Terms & Conditions
Site powered by BizNet