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West Coast Stonn,lnc. <br />Storm lVater and Envirownental 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 />RFP# 080-591792 <br />West Coast Storm Connector Pipe 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 />Device Manufacturing Assembly. The CPS device is assembled accordu1g to following <br />requirements: <br />1) CNC punch all individual parts. <br />2) Form (bend) all parts to the appropriate drawing. <br />3) Insert all necessary hardware into the required parts. <br />4) Seam weld the vertical members to the horizontal members ]Waking the frame. <br />5) Be sure frame is square. <br />6) Cut individual perforated screen for necessary areas. <br />7) Tack weld the perforated screen into the frame. <br />8) Using the 10-32 CREW screws, attach the appropriate bypass supports (if needed). <br />9) Using the 10-32 CREW screws, attach the appropriate bypass top (if needed). <br />10) Using the 10-32 CREW screws, attach the bottom extensions. <br />11) Mark the CPS device with the applicable location ID. <br />12) CPS devices are shipped completely assembled. Most CPS devices will fit through the man <br />hole assembled. If they don't fit, the bypass top and supports can be removed and re- <br />assembled in the storm drain. <br />Flow or range of flows for which device is rated (in cubic feet per second). <br />The table below provides an example of screen capacity in cubic feet per second based on a catch basin with a 3.5' <br />V-depth. <br />V-depth <br />(ft) CB <br />width Max 10-yr. <br />flow rate (efs) Bypass <br />Height <br />(in) Freeboard <br />(in) Screen <br />Height <br />(in) Max 1-yr. <br />flow rate <br />(cfs) Clearance <br />(in) Screen <br />Length (ft) Screen <br />Capacity <br />(cfs) <br />3.5 3.5 2.8 6.0 6.0 18 0.6 10.0 1.5 1.5 <br />3.5 7.0 5.3 6.0 6.0 18 1.2 10.0 2.9 2.9 <br />3.5 10.0 7.5 6.0 5.0 18 1.7 10.0 3.8 3.8 <br />3.5 14.0 10.0 8.0 0 18 2.2 8.0 3.1 3.1 <br />3.5 21.0 13.9 8.0 0 18 3.1 8.0 4.3 4.3 <br />3.5 28.0 17.3 12.0 0 18 3.8 4.0 3.9 3.9 <br />Note: Results were obtained from the California Regional Water Quality Control Board, Los Angeles Region Approved County ofLos Angeles Connector Pipc <br />Screen Design Technical Report, page 12. <br />Page 18 of 41 <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 />25C-43