Storm Water Inlet Screen Page 1 of 4
Section [________]
Storm Water Inlet Automatic Retractable Screen
PART 1 – GENERAL
01.01.00 Purpose
The purpose of this specification is to establish generally acceptable criteria for Automatic Retractable Screens (ARS) using flow control blades that prevent trash and debris from entering catch basins and other storm water drainage infrastructure. It is intended to serve as a guide to promote understanding regarding materials, manufacture and installation; and to identify devices complying with this specification.
01.02.00 Description
The ARS using flow control blades is used for screening stormwater runoff including dry weather flows. The ARS is a pre-engineered automatic retractable water screening system designed to stop larger trash and debris from entering catch basins during low to moderate flows by staying closed.
During higher flows water pressure force the flow control blades to open only where flow is present and only to a distance needed to pass the flow into the catch basin thus continuing to block trash and debris at all flow rates.
01.03.00 Manufacturer
The manufacturer of the ARS shall be one that is regularly engaged in the engineering design and production of systems developed for the treatment of stormwater runoff for at least (10) years, and which has a history of successful production that is acceptable to the engineer of work. In accordance with the drawings, the ARS(s) shall be a device manufactured by Bio Clean Environmental Services, Inc., or assigned distributors or licensees. Bio Clean Environmental Services, Inc. can be reached at:
Bio Clean Environmental Services, Inc
Corporate Headquarters:
398 Via El Centro
Oceanside, CA 92058
Phone: (760) 433-7640
Fax: (760) 433-3176
www.biocleanenvironmental.com
01.04.00 Submittals
01.04.01 Submittal drawings are to be provided with each order.
01.04.02 Submittal drawings are to detail the ARS and all components required and the sequence for installation, including:
• System configuration with primary dimensions
01.04.03 Inspection and maintenance documentation submitted upon request.
01.05.00 Work Included
01.05.01 Specification requirements for installation of ARS.
01.05.02 Manufacturer to supply components of the ARS(s):
• Flow Control Blade Assembly
• Mounting hardware
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PART 2 – COMPONENTS
The Automatic Retractable Screen (ARS) and all of its components shall be made of 304 and 316 stainless steel. The Flow Control Blades shall be fabricated out of structural polymer with an ultraviolet inhibitor to withstand environmental conditions.
02.01.00 Screening System/Flow Control Blades
02.01.01 Pivot Support Rod shall be manufactured of stainless steel grade 304 or 316, round bar. Length of bar will be per submittal drawings. All joints and seams are to be welded or fastened together with stainless steel hardware.
02.01.02 Flow Control Blades shall be fabricated out of structural polymer with an ultraviolet inhibitor to withstand environmental conditions. The blades shall assembled end to end to provide full coverage of the basin and move independently pivoting from the support rod.
02.01.03 Spring Tensioner shall be manufactured of stainless steel grade 304 or 316 and shall be field-adjustable to return screens to their closed position. The spring tensioner shall interconnect all the blades with a 316 stainless steel, 19 strand cable. No single/one movable screen or blade is allowed.
02.01.04 Mounting Bracket shall be manufactured of stainless steel grade 304 or 316.
The mounting bracket shall be secured to the concrete structure per section
02.01.05. Side brackets shall be hinged and adjustable for recessed mounting. Center mount shall be a pressure plate that is adjustable.
02.01.05 Mounting Hardware shall consist of 1/4" diameter Type 316L stainless steel mushroom head spike anchors or wedge anchors. The anchors shall secure the mounting brackets to the curb. The spike anchors shall not protrude from the face of the mounting bracket more than 7/64". Mounting hardware shall be installed per section 04.02.00
PART 3 – PERFORMANCE
The inlet screen shall meet performance specifications listed on the submittal drawings.
03.01.00 General
03.01.01 Function – The ARS is used for screening stormwater runoff including dry weather flows. The ARS is a water screening system designed to separate solid debris typically found in runoff.
03.01.02 Automatic Retractable Screen - The ARS is composed of a series of flow control blades extending downward from the pivot support rod which extends across the top portion of the curb opening. The blades pivot independently of one another yet are interconnected by a connection cable or spring. The connection cable attaches to each blade via an aperture that is mounted to the back of the blade in a slide grove so it can move up and down. The blades work together like baleen to allow runoff to pass into the basin where needed while staying closed and preventing trash and debris from passing through.
03.01.03 Removal Efficiencies - The ARS’s screening system must be capable of capturing 93% of all materials (trash and debris) during rain events based on independent field analysis performed by a municipality. In the closed position it should be cable of capturing 100% of all materials greater than the size of the screen openings.
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PART 4 - EXECUTION
04.01.00 General
The installation of the ARS shall conform to all applicable national, state, state highway, municipal and local specifications.
04.02.00 Installation
The contractor shall furnish all labor, equipment, materials and incidentals required to install the (ARS) device(s) and appurtenances in accordance with the drawings, installation manual, and these specifications. Any damage to catch basin and surrounding infrastructure caused by the installation of the ARS is the responsibility of the installation contractor.
04.02.01 Assembly - ARS shall be fully assembled prior to installation. To assemble ARS, attach screen section to side plates and mounting brackets with supplied hardware.
04.02.02 Mounting Anchors - After ARS is completely assembled per section 04.02.01 attach mounting brackets to inside of curb inlet using mounting hardware supplied by manufacturer per section 02.01.05. To install mounting anchors, a pilot hole must be drilled into curb face a minimum 1-3/4" to a maximum of 2".
The anchor shall then be inserted into pilot hole and properly set using a hammer or specially designed driver.
04.03.00 Shipping, Storage and Handling
04.03.01 Shipping – The ARS unit(s) shall be shipped to the contractor’s address or job site. The contractor is responsible for off-loading and placing the units(s) in the exact site of installation.
04.03.02 Storage and Handling – The contractor shall exercise care in the storage and handling of the ARS and all components prior to and during installation. Any repair or replacement costs associated with events occurring after delivery is accepted and unloading has commenced shall be born by the contractor. The ARS(s) and all components shall always be stored indoors and transported inside the original shipping container until the unit(s) are ready to be installed.
The ARS shall always be handled with caution according to contractor’s workplace safety professional recommendations.
04.04.00 Maintenance and Inspection
04.04.01 Inspection – After installation, the contractor shall demonstrate that the ARS has been properly installed at the correct location(s), elevations, and with appropriate components. All components associated with the ARS and its installation shall be subject to inspection by the engineer at the place of installation. In addition, the contractor shall demonstrate that the ARS has been installed per the manufacturer’s specifications and recommendations.
All components shall be inspected by a qualified professional at least once a year and results of inspection shall be kept in an inspection log.
04.04.02 Maintenance – The manufacturer recommends cleaning and debris removal as needed. The maintenance shall be performed by a qualified professional.
A maintenance manual is available upon request from the manufacturer. The manual has detailed information regarding the maintenance of the ARS. A maintenance/inspection record shall be kept by the maintenance operator.
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The record shall include any maintenance activities performed, amount and description of debris collected, and the condition of the ARS.
04.04.03 Material Disposal – All debris, trash, organics, and sediments captured by the ARS shall be transported and disposed of at an approved facility for disposal site in accordance with local and state requirements. Please refer to state and local regulations for the proper disposal of toxic and non-toxic materials.
PART 5 – QUALITY ASSURANCE
05.01.00 Warranty
The manufacturer shall guarantee the ARS against all manufacturing defects in materials and workmanship for a period of (1) year from the date of delivery to the customer. The manufacturer shall be notified of repair or replacement issues in writing within the warranty period. The ARS is limited to the recommended application for which it was designed.
05.02.00 Performance Certification
The ARS manufacturer shall submit to the Engineer of Record a “Manufacturer’s Performance Certificate” certifying the ARS is capable of achieving the specified flow rate. Devices without these performance certifications will not be accepted.
END OF SECTION
Bio Clean ARS
A Stormwater Trash Capture Solution
INSTALLATION MANUAL
5796 Armada Drive Suite 250 | Carlsbad, CA 92008 | 855.566.3938 [email protected] | biocleanenvironmental.com
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INSTALLATION
The Bio Clean ARS requires minimal time and tools for installation. The system is especially designed to be the easiest system on the market in install. Generally, the system can be installed into the basin from the curb opening. The end mounting brackets are adjustable and require only one wedge anchor per side. The center mount is pressure fitted to the top and bottom of the curb opening with now need to drill into the concrete.
It is recommended that the catch basin be cleaned during time of install as the install can be used as opportunity to do so. Also, this will allow the client to accurately observe the effectiveness of the Bio Clean ARS from preventing trash and debris from entering the basin.
Requirements:
The contractor shall furnish all labor, equipment, materials, and incidentals required to install the ARS and appurtenances in accordance with the contract documents. Any damage to the existing drainage structure (retrofit applications) or surrounding infrastructure that may need to be repaired to allow for proper installation of the ARS shall be considered incidental and to be paid for at no cost to the client. Bio Clean does offer installation services in certain areas. Please contact Bio Clean for more information on pre-authorized 3
rd party contractors that can provide install service in your area.
The manufacturer of the Bio Clean ARS does provide a warranty against defects in materials and workmanship for a period of 3 years from the date of acceptance by the Engineer. The Bio Clean ARS also carries a 2-year warranty on installation.
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Components:
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Tools:
• Marker – Sharpie
• Tape Measure
• Square – Straight Edge
• Grinder – Cut off blade
• Hammer (recommend 2lbs sledge hammer)
• Level 24”
• RotoHammer w/ 3/8” x 6” concrete bit
• 9/16 wrench
• Impact Drill with 9/16 socket (not required)
Hardware:
• 3/8” x 2 ¾” Wedge Anchors
• 3/8” x 1 ½” Nuts & Bolt, Washers
• Tringle Mounting Bracket
• Slotted “L” Bracket
Installation:
1. Before cutting the child safety bar, you must slide the ARS unit into the drain opening for a test fit. If the unit slides in, pull the units back out and cut the child safety bars off if necessary. Do not cut the vertical support bars off.
2. Set the ARS unit(s) in front of the drain numerically from left to right.
3. Verify that the end brackets fit into the catch basin correctly. If they do not fit, modify the bracket keeping in mind of the bracket holes that need be used to secure the swiveling bracket.
4. Remove swiveling bracket from back of unit and place into each end section making sure that the bracket leaves 1”-1.5” of clearance for the final ARS installation. Mark the bracket final location making sure the bracket sits at desired vertical angle in the basin. Please not that these can be angled differently dependent on type of catch basin to make sure optimal trash capture.
5. Hammer drill the marked holes and secure in the swiveling bracket into the wall.
6. Remove tensioner spring from back of the unit and slide bracket off of top support bar.
Secure bracket into one side of curb using the hex bolts and hex wrench for that particular size.
7. Slide support bar back into bracket and verify that unit fits into basin correctly. Remove Swiveling bracket from unsecured side and repeat steps 4 and 5 securing the swiveling bracket to the inner wall of the catch basin. ****Please note this step will be different if multiple units are strung together. Please refer to 3 steps for multiple units****
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a. Loosen tension bracket so that it can be easily adjusted. b. Verify length of first unit and slide into place the tension bracket that is included so that front bracket holes line up with the first section of holes on the tension bracket. c. Add structural caulking adhesive onto the tensioner bracket so that bracket stays in place and tighten the unit to fit the catch basin walls d. Attach front bracket hex screws to the tension bracket and repeat steps to fully install the complete basin
8. If unit is too long for the catch basin, remove the unsecured bracket from the support rod leaving the curb blades and support rod in the catch basin.
9. Measure the amount that is needed to be removed from the top support bar. Pull off necessary amount of blades to have a clear cut onto the support bar. Cut the top support bar to fit the new sized catch basin and replace the necessary amount of blades to make a seamless front ARS unit.
10. Dethread the retaining pin and cut the spring to the desired amount and tension. Rethread the retaining pin screw and secure tension spring to the back of the unit.
11. Place front bracket onto swiveling bracket and secure using hex wrench.
12. Verify that each blade moves independently and that the desired tension is in the spring.
13. If there is a need to add or remove tension to the system, adjust lateral tension screws on the front bracket to make the unit have more or less tension into the system.
For Installation Support
Please Contact Us At:
760-433-7640
[email protected]
Bio Clean ARS
A Stormwater Trash Capture Solution
A Forterra Company
OPERATION & MAINTENANCE
MANUAL
5796 Armada Drive Suite 250 | Carlsbad, CA 92008 | 855.566.3938 [email protected] | biocleanenvironmental.com
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MAINTENANCE
The Bio Clean ARS requires minimal preventative maintenance. Regular street sweeping will prevent debris from building up in front of the unit thereby obstructing storm water from entering the catch basin curb opening. The Bio Clean ARS is specially designed with flow control blades that will open during larger rain events to prevent flooding regardless of trash build up in front of the unit.
Pressure-washing the unit may be necessary if street sweeping is unavailable.
Yearly Maintenance Schedule:
Inspections consist of visually inspecting the unit from street level and performing an opening- closing function check.
Visual Inspection:
1. Built-up debris and foreign object debris can hinder the unit’s operation. Remove any visible debris that may be on, in front of, and nearby the unit.
2. Look for any visible signs of vandalism or damage that may compromise the unit’s ability to properly function. Attempted vandalism and slight damage should be inspected closely to ensure no future damage may result.
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Opening-Closing Function Check:
1. Manually push on the blades at the bottom from the front of the catch basin. Perform this at the center and at each end of the device Please ensure all appropriate traffic control has been set up and all appropriate safety procedures are followed based on local and state regulations, if required.
2. Observe if the tension is appropriate on the blades and that the return to the close position. Note if any or all of the blades to not return to the close position.
3. Observe if the blades which are interconnecting work together. The blade being pushed on should open the most and the adjacent blades should open slight less in an outward pattern as shown below. Please note if any blades are moving or not moving outside of this pattern.
5. Check to see if the tensioner and cable/spring is properly connected behind each blade. Note any issues related to the cable/spring not being connected.
Blades Maintenance/Adjustment/Replacement:
1. Verify which Blade is damaged and plan which faceplate is easiest and most efficient to remove.
2. Remove Faceplate from brackets and remove tension spring from back of unit.
3. Slide each blade off until damaged blade has been reached. Replace damaged blade or blades.
4. Feed tensioner spring through all the back clips and attach faceplate to top bar.
5. Secure tensioner spring on back of unit and secure faceplate to mounted bracket
LA-ARS Locking Screen: Torsion Spring and Adjustment Knob System Maintenance
1. Verify unit does not have damage blades and working properly
2. Check the status of the locking system making sure the system can tighten by first releasing the unit by pressing on the releases on each side of the unit. If unit releases, proceed to next step
3. Check the status of the tension knob by clicking it tighter to make sure the unit tightens with each click of the tightening knob. If unit tightens, maintenance is complete.
4. If unit does not tighten or release, remove faceplates from bracket and remove torsion spring system. Both Torsion Spring and Adjustment knob units will need to be replaced.
5. Screw new torsion spring and adjustment knob system into place and place metal wire into plastic holding system on back of each blade.
6. Test unit by tightening and releasing the locking system. If unit is working properly, reinstall unit.
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Replacement Schedule:
All components on the on the Bio Clean ARS are made from 304 or 316 stainless steel parts with the exception of the flow control blades which are made of structural polymer. Replacement of individual blades is quick and easy. If during maintenance inspection it is observed the unit is damaged or vandalized to the point at which the opening-closing function is not operating correctly, the unit should be repaired. Bio Clean Environmental should be notified if a replacement parts or repair work is needed.
For Maintenance Services
Please Contact Us At:
760-433-7640
[email protected]