Inlet Filters - Catch Basin Inserts

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Curb Inlet Basket Inlet Capacity Curb Inlet Grate Inlet Skimmer Inlet Skimmer Box Inlet filter Catch
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Curb Inlet Basket Inlet Capacity Curb Inlet Grate Inlet Skimmer Inlet Skimmer Box Inlet filter Catch
 Inlet Filters | Catch Basin Inserts
 Operation and Maintenance Manual
Suntree Technologies, Inc® 
798 Clearlake Road, Suite 2 
Cocoa Florida 32922
321.637.7552
www.suntreetech.com
info@suntreetech.com
 Version 1.0
 
 Table of Contents
   
 Warning 
 
 
pg 03
  
 Curb Inlet Basket™ Information  
 
pg 04
   
 Curb Inlet Basket™ Operation  
 
pg 05
   
 Curb Inlet Basket™ Maintenance  
 
pg 06
   
 Grate Inlet Skimmer Box™ Information 
 
pg 07
  
 GISB™ Specifications  
 
pg 08
  
 GISB™ Operation 
 
pg 09
  
 GISB™ Maintenance 
 
pg 10
  
 
StormBoom™ Media  
 
pg 11
  
 Warranty  
 
pg 12
  
 Notes 
 
 
pg 13
   
 Contact Information  
 
pg 14
"Innovative Stormwater Management Solutions" 
Since 1993
 
 Warning
Read the Following Information, Instructions and
Warnings Before Inspecting, Cleaning or Performing 
Maintenance on this Stormwater Treatment Device.
This manual is intended to explain the specifics of the
Suntree Technologies, Inc® Grate Inlet Skimmer Box™,  
High Capacity Curb Inlet Basket™ and Standard Capacity 
Curb Inlet Basket™  while reviewing the aspects of existing 
regulations and safety procedures. It is the responsibility of 
all personnel to familiarize themselves with, understand 
and comply with all applicable local, state and federal laws 
before attempting to inspect or service this unit.
All precautions and procedures in this manual are current  
at the time of printing but are subject to change based  
on the development of new processes and procedures. 
Suntree Technologies, Inc.® assumes no responsibility  
and is not accountable for any injuries, fines, penalties  
or losses that occur involving any procedure in this  
manual or other unaddressable actions taken. 
The Grate Inlet Skimmer Box™, High Capacity Curb 
Inlet Basket™ and Standard Capacity Curb Inlet Basket™ 
performance is based on the procedures being followed in 
this manual. Non-Compliance with the outlined measures 
will be the responsibility of the owner.  
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
03
 
 Curb Inlet Basket™ Information
Standard Capacity Curb Inlet Basket™ and 
High Capacity Curb Inlet Basket™ Information
 The Standard Capacity Curb Inlet Basket™ (used in  
 
 shallow catch basins) and High Capacity Curb Inlet Basket™  
 
(used in deep catch basins) are specialized inlet filters used  
 specifically for curb inlets where the only access element is  
 a manhole. Both units are made of UV Coated marine grade  
 fiberglass and stainless steel to ensure longevity and  
 durability. Stormwater flow is directed into the filtration   
 basket via a shelf system that is located directly under the  
 manhole for easy access. Under high volume flows, the   
 water can bypass the filtration system by simply flowing  
 past the filter and into the catch basin.  
 Benefits
• Will not impede design flow of the inlet.
• Removes more than 80% of total suspended solids.
• The High Capacity Curb Inlet Basket is able to retain  
 
 hundreds of pounds of debris and sediment.
• Screens of different sieve sizes optimize filtration and flow.
• Bypass openings prevent clogging.
• Multi stage filtration captures hydrocarbons, sediment, litter  
 and foliage.
• No need to enter the confined space of the catch basin.
• Easily serviced by vacuum truck.
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
04
High Capacity Curb Inlet Basket™ 
with built in shelf system for ease 
of installation and service. For use 
in deep catch basins.
Standard Capacity Curb Inlet 
Basket™ with built in shelf system 
for ease of installation and 
service. Typically used regularly 
 in shallow catch basins.
Curb inlet where servicing can only occur via  
access from the manhole. 
 
 Curb Inlet Basket™ Operation 
 
Operation Summary
 
The Curb Inlet Basket™ (CIB™) and High Capacity Curb  
 
Inlet Basket™ (HCCIB™) are unique for their “Shelf System”  
 
which directs stormwater flow into the filter positioned  
 
directly under the access manhole. The Shelf System  
 
can be manufactured to any size and style of catch basin.  
 
The CIB™ and HCCIB™ are multi stage filtration systems  
 
that can capture a variety of pollutants during a storm:
1 
Stormwater carrying debris and pollutants enters the  
 
inlet through the curb.
2 
An adjustable throat width funnels water to the weir.  
 
The immediate drop in the throat elevation prevents  
 
head loss through the inlet. This allows sediment to  
 
collect along the incoming side of the weir.
3 
The water then flows over the weir and into the removable  
 
filtration basket, filtering out trash, foliage and sediment.  
 
Furthermore, If a StormBoom™ is installed, it will filter out  
 
any hydrocarbons from the stormwater as it flows into the  
 
filtration basket.
4 
Filtered water leaves the basket and enters the catch basin  
 
where it flows down stream. The position of the curb inlet  
 
basket high in the catch basin allows for captured debris  
 
to dry between storm events as well as avoid restriction to  
 
any up stream pipes.
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
05
Standard Capacity Curb Inlet 
Basket™ removed from shelf 
inside inlet. The filtration basket 
holds dried debris ready to be 
disposed of and screen cleaned. 
High Capacity Curb Inlet Basket™ 
after storm event containing 
dry foliage and debris ready for 
collection and disposal.
Curb Inlet Basket™ operation diagram depicting water flow. 
 
 Curb Inlet Basket™ Maintenance 
 
Maintenance Summary
 
Heavy equipment is not required and the use of a vacuum  
 
truck is optional when servicing the CIB™. Whether servicing  
 
manually or with a vacuum truck, the 15 minute cleaning  
 
time facilitated by the Shelf System eliminates the need for  
 
confined space entry.  
 
 Manual Servicing
•  Remove the manhole cover.
•  Remove filtration basket either by hand or with  
 
 manhole hook tool.
•  Cut zip ties, remove StormBoom™ and dispose. 
•  Attach new StormBoom™ with zip ties.
•  Brush filtration basket screens clean if necessary.
•  Replace filtration basket and replace manhole cover.
 
 Vacuum Servicing
•  Remove the manhole cover.
•  Cut zip ties, remove StormBoom™ and dispose.
•  Reach into filtration basket with vacuum truck hose and  
 
 suction out debris.
•  Attach new StormBoom™ to skimmer tray with zip ties.
•  Replace filtration basket and replace manhole cover.
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
06
Standard Capacity Curb Inlet 
Basket™ installed under the 
manhole cover, full of trash and 
debris and ready for servicing. 
High Capacity Curb Inlet Basket™ 
full of debris and needs to be 
cleaned. The StormBoom™ is 
discolored indicating the need  
for necessary replacement.
The shelf system allows for easy access to each  
Curb Inlet Basket™ for manual servicing. 
 
 Grate Inlet Skimmer Box™ (GISB™)
General Information
 
 The Grate Inlet Skimmer Box™ (GISB™) is a specialized inlet  
 
 filter used specifically for 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 stormwater passes through the internal skimmer  
 
 
tray and into contact with a hydrocarbon absorption boom.  
 
 
 
 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 is thus  
 
 able to pass into the catch basin system allowing the  
 
 filters to dry after each storm event. 
 
 Benefits
•  Will not impede design flow of the inlet.
•  Captures hundreds of pounds of debris and sediment.
•  Screens of different sieve sizes optimize filtration and flow.
•  Bypass openings prevent clogging.
•  
Interior components are easily removed to allow access to   
 
 
the lower chamber.
•  Removes more than 80% of total suspended solids
•  No need to enter the confined space of the catch basin.
•  Easily serviced by vacuum truck.
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
07
Grate removed and prepared 
for installation of the Grate Inlet 
Skimmer Box™.
Grate Inlet Skimmer Box™ 
filtration basket installed into  
the grate inlet.
Grate Inlet Skimmer Box™ 
skimmer tray installed into the 
filtration basket and ready for use.
 
 GISB™ Specifications
Common Size GISB™ Flow Rate Specifications
 
 The maximum flow rate of the Grate Inlet Skimmer Box™  
 
 
is determined by the amount of flow that can pass through  
 
 
the throat, the exception is found only in very large units.  
 
 
 
 For instance, if the potential flow through the throat is less  
 
 
than the potential flow through the bypass, then the throat  
 
 determines the maximum flow. However, if the potential  
 
 water flow through the bypass is more than the throat,  
 
 
then the bypass determines the maximum flow. Filtered  
 
 
flow represents the potential flow rate through all screens  
 
 and does not include the potential flow through the bypass.  
 
 Water flow through the bypass happens only when the  
 
 
flow rate through the grate exceeds the flow rate through  
 
 all the screens or the filtration basket is full. 
 12-12-12  
12  
12  
12  
0.5  
2.1  
1.0
 15-30-25 
15 
30 
25 
0.54 
18.5 
6.6
 I-24-24-25 
24 
24 
25 
4.4 
4.0 
4.0
 A-24-37-25 
24 
37 
25 
10.2 
21.1 
8.7
 C-28-37-25 
28 
37 
25 
12.2 
19.4 
7.4
 36-36-25 
36 
36 
25 
18.8 
23.4 
13.4
 E-36-54-18 
36 
54 
18 
37.6 
27.8 
15.0
 S-46-39-18 
46 
39 
18 
38.2 
28.1 
14.8
 F-48-30-18 
48 
30 
18 
22.5 
22.6 
10.4
 G-52-58-18 
52 
58 
18 
89.3 
40.1 
25
 H-78-36-18 
78 
36 
18 
67.1 
50.6 
25.1
 GISB  
 Model #
 Width  
 (Inches)
 Length  
 (Inches)
 Depth 
 (Inches)
 Throat
 Filtered  
 Flow  
 (cfs)
 Bypass  
 Flow  
 (cfs)
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
08
 
 *GISB™ flow rates are based on common size units,  
 
 however, custom size units are available.   
 
 GISB™ Operation 
 
Operation Summary
1 
Stormwater enters the inlet through the grate and passes  
 
through the StormBoom™ installed around the basket top.
2 
Throughout the storm event, water continues to come in  
 
contact with the StormBoom™ and then flows into the  
 
lower filtration chamber.
3 
As the storm intensity increases, the water level in the  
 
GISB™ rises to an adjacent level with the medium size 
  
sieve screens and turbulence deflector.
4 
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.
5 
If the stormwater flow rate is extreme or the GISB™ is full  
 
where it exceeds flow through all the screens, the water  
 
will bypass the screens by passing through skimmer   
 
protected openings at the top of the GISB™. 
6 
After the storm event has subsided, the stormwater  
 
 
will drain from the GISB™, leaving all collected debris   
 
suspended in the basket to dry until removal during  
 
 
routine maintenance. 
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
09
GISB™ after storm event, full of debris and discolored StormBoom™
indicating the need for service and replacement.
 
 GISB™ Maintenance 
 
Maintenance Summary
 
The Grate Inlet Skimmer Box™ is recommended to be   
 
inspected and serviced quarterly. However, site conditions  
 
can affect the service interval to be either longer or shorter  
 
than the quarterly recommendation. The maximum flow  
 
capacity of the Grate Inlet Skimmer Box™ will be restored  
 
after each servicing. The flow rate through the unit will be  
 
the same as a new one no matter the times serviced due  
 
to the durable stainless steel construction of the GISB™  
 
The unit can easily be serviced manually or with the  
 
assistance of a vacuum truck. 
 
 Manual Servicing
•  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.
 
 Vacuum Servicing
•  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 with vacuum 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.
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
10
Grate Inlet Skimmer Box™ 
filtration basket removed by hand 
for manual disposal of debris and 
basket cleaning.
Grate Inlet Skimmer Box™ 
filtration basket being cleaned via 
vacuum truck hose and screens 
washed with spray wand.
 
 StormBoom™ Media 
 
Hydrocarbon Absorption Booms
 
Suntree Technologies Inc.® manufactures various  
 
media based StormBooms™ designed to filter a  
 
variety of pollutants. There are four types of media  
 
that StormBooms™ can be made of including:  
•  Type 1:  Hydrophobic Treated Cellulose is a wide  
 
 
 
spectrum absorbent with a large sieve covering  
 
 
 
capable of absorbing chemicals other than oils  
 
 
 
and hydrocarbons. This media is a cellulose filler  
 
 
 
made from reclaimed paper mill by-products.  
 
 
 
Liquids are drawn into the cellulose fibers through  
 
 
 
capillaries and are encapsulated in the boom. It is  
 
 
 
recommended that this type of boom should be  
 
 
 
replaced every 3 to 4 months.
•  Type 2:  Melt Blown Polypropylene with a large size
 
 
 
sieve covering which is limited to hydrocarbon  
 
 
 
absorption but will not biodegrade. This type of  
 
 
 
boom is recommended to be replaced every 3 to  
 
 
 
4 months or when it starts to look darkened.  
•  Type 3:  50 – 50 blend of Hydrophobic Treated  
 
 
 
 
Cellulose and Melt Blown Polypropylene with a  
 
 
 
large sieve sized covering. This boom offers wide  
 
 
 
spectrum absorption with an extra emphasis on  
 
 
 
hydrocarbons. This boom is vastly effective in high 
 
 
 
pollutant areas such as repair facilities and gas  
 
 
 
stations. It is recommended that this type of boom 
 
 
 
be replaced every 3 to 4 months. 
•  Type 4:  Polymer Crumb Filler with a fine sieve size  
 
 
 
covering. This media will not absorb water and  
 
 
 
can float indefinitely as well as not biodegrade.  
 
 
 
This media is limited to hydrocarbon absorption  
 
 
 
which occurs on contact by chemically bonding  
 
 
 
with hydrocarbon molecules. This type of boom  
 
 
 
should be replaced every 3 to 4 months or as  
 
 
 
needed, when it starts to darken in color.
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
11
Warranty
Warranty Information
Suntree Technologies, Inc® products are engineered and 
manufactured with the intent of being a permanent part of 
the infrastructure. Suntree Technologies, Inc® warranties 
its products to be free from manufacturing defects for a 
period of five (5) years from the date of purchase. 
In the event a warranty claim is made and determined 
to be valid, Suntree Technologies will replace or repair 
the product at their own discretion. Warranty claims 
must be submitted, evaluated and approved by 
Suntree Technologies for the claim to be determined 
valid. All warranty work must be authorized by Suntree 
Technologies prior to work beginning not covered by  
this warranty. There are no warranties expressed or  
implied other than what is specified herein.  
 
Abusive treatment, neglect or improper use of the  
Curb Inlet Basket™, High Capacity Curb Inlet Basket™  
or Grate Inlet Skimmer Box™ will not be covered.  
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
12
Notes
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
13
General Inquires
For additional information concerning general usage, 
maintenance products, warranties or replacement parts 
please contact:
 
 
Suntree Technologies Inc.®
 
 
798 Clearlake Road, Suite 2
 
 
Cocoa, Florida 32922
Phone:  321.637.7552
Fax:  
321.637.7554
Web:  
www.suntreetech.com
Email:  
info@suntreetech.com
Visit our website for in depth information  
on all of our products! 
Contact
Inlet Filters | Catch Basin Inserts Operation and Maintenance Manual 
14