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.. <br />(k-'-1 <br />WeYsll-Wy-oastSto17n,Inc. <br />Storm ff ater and Ertviromttental Solutions <br />County of Orange, OC Public Works <br />Automatic Retractable Screen Excluders, Connector Pipe Screen Full Capture Trash <br />Systems, and Catch Basin Inserts <br />RIF, P# 080-591792 <br />West Coast Storm Screen <br />Automatic Retractable Screen <br />Equipment Design and Specification Report <br />(Information provided to the City as requested in the RFQ documents under <br />Attachment A. Scope of Work) <br />West Coast Storm Automatic Retractable Screens Operation Criteria <br />The ARS device swings open and remains open as long as the flow depth exceeds specified <br />height and return to the mechanically locked and closed position as the flow of water recedes. <br />The West Coast Storm Screen device meets the following criteria: <br />1) Screens cover the entire existing curb opening. The maximum clear opening between the <br />top, bottom, and sides of the curb opening and the screen or frame of the screen shall be <br />%2 inch. <br />2) The Device has no springs, pulleys, buckets, troughs or protruding tracks, thereby <br />enabling the full capture trash system to function without obstruction. <br />3) In curb openings with support bolts, multiple units shall be installed between the existing <br />support bolt(s) to span the entire curb opening width. <br />4) The existing support bolt(s) shall be protected in place and the operation of the units shall <br />not be hindered by the support of the bolt(s). <br />5) The maximum clear opening between adjacent screens, adjacent fixed frame members, or <br />between the screens and support bolts shall be %2 inch. <br />6) At no point in its range of motion shall any part of the screen or the operating mechanism <br />interfere with the function of a CPS device or its bypass. <br />7) If any part of the frame of the unit is fixed and does not swing open, the maximum <br />allowed width of the fixed part of the frame is 1.5 inches per side per unit. No fixed parts <br />shall obstruct the top or bottom of the catch basin opening. <br />8) All screens shall be fabricated from twelve (12) gauge (0.105 inches), with 3/4 -inch <br />diameter holes, and with a total open area of not less than 50 percent. <br />9) The edges of the screen shall be ground to remove all sharp edges. <br />10) The ARS device can be adjusted to open (unlock) at a specific height specified. <br />11) The operational (locking) mechanism is isolated from the storm drain and debris. A built <br />in 0.50 inch gap between the main screen and ARS ends also insures the mechanism <br />isolation. <br />Page 3 of 45 <br />654 South Lincoln Avenue, San Bernardino, CA 92408 — Telephone 909.890.5700 Facsimile 909.890.5988 <br />California General A/HAZ Contractor License Number: 888152 <br />