Site work for a water / sewer project in San Rafael, California. Completed plans call for site work for a water / sewer project.

The project consists of 3 phases and the work is generally described as: 1. Phase 1 a) Install approximately 33 of new 36 line from existing 24 blind flange to existing 36 Chlorine Contact Chamber (CCC) piping. b) Install new 24" isolation gate valve at the existing tee fitting/spool. c) Install a new manhole (8-foot diameter with cast-in-place floor) over existing 36" CCC piping. 2. Phase 2 a) Install 8-foot diameter manhole with cast-in-place floor over existing 42" secondary effluent piping. Remove dual reducers at this location once the work is completed. b) Remove approximately 16' of 24" line at the CCC Weir Box along with associated concrete covering as needed. c) Core hole for 42" HDPE pipe in CCC Weir Box. d) Install approximately 50' of 42" HDPE line from new manhole to CCC Weir Box. e) Install new doppler ultrasonic flow meter (Hach Submerged Area/Velocity Sensor and AV9000 or similar) in 42" line adjacent to new manhole. 3. Phase 3 a) Remove reducers in new manhole, cap pipe, and remove existing flow meter. Questions regarding the bid package should be directed in writing as soon as possible (but no later than five (5) working days prior to the opening of bids to: Irene Huang, PE, Associate Engineer, 101 Lucas Valley Road, Suite 300, San Rafael, CA 94903. Where appropriate, the District may respond to such questions by addenda transmitted to all bid package recipients.