Agmt06 CSG Consultants - RWC Recycled Water Phase 1, Redwood Shores Distribution (Bid pkgs 1 & 2)

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2. Laydown & Equipment Parking- Sheet 2 of the plans under note 5a, state that no over night parking of construction equipment is allowed except as locations approved by the City Engineer. We recommend providing contractors with laydown and storage areas to reduce the unit bid costs. In other projects, CSG staff secured sites for storage of materials and equipment prior to bid process to minimize contractors' mark up. 3. Trench de-watering, disposal of trench water and NPDES- Our review of the plans did not indi- cate any measures for de-watering and disposal requirements and compliance with NPOES for this activity. Due to proximity to San Francisco Bay and depth of trenches, it is likely that the contractor will have to utilize de-watering techniques to install the water main. CSG staff will work with the City staff, Kennedy Jenks, and City's geotechnical consultants to specify guidelines for disposal and de-watering of the trench. We suggest inclusion of geotechnical data on the plans indicating ground water elevation and the date of geotechnical exploration to inform the contractor of site conditions. 4. Bay Mud/back fill, geotechnical conditions and shoring- The plans include detail RWT2 for trenches within Bay Mud. We recommend plans indicate the limits and areas where contractor may potentially be excavating in Bay Mud. CSG staff will work with City and its consultants to ensure contractors are well informed of these site conditions that may require special shoring and backfill. 5. Utility conflicts and potholing- The pipeline crosses numerous utilities whose depth are shown on the drawings. Note 3e of the plans references the Potholing Report in the specifications. Given the uncertain nature of underground installation, it is recommended that all pothole information be included in the plans. and that plans and specifications include timing and locations of additional required contractor potholing. 6. Pavement replacement and A.C. thickness- The plans should include known information of exist- ing structural sections of pavements. The plans also include RWT-1 and RWT-2 requiring replace- ment of all AC section within 3 feet of gutter. Our staff will work with the City consultants to ensure that the contract specifications include these requirements. 7. Separation of utilities- Notes under section 4 establish OHS requirements for separation of water mains and require 01 pipe in certain areas. We recommend the plans show locations for this change in pipe material. Also, in recent months, due to Hurricane Katrina, the price and delivery schedule of PVC pipe has increased significantly. It may be cost effective to consider alternate pipe material through an alternate bid process or explore other options to purchase pipe to expedite completion of the project. 8. Preliminary Plan Review- CSG consultants provides plan review services for a number of jurisdic- tions. We understand the plans for this project are not yet complete and are still under revision. We have identified a number of inconsistencies in the details, drafting standards, recycle water services outside rights of way and other corrections that will have to be addressed prior to the bid process. CSG will provide a comprehensive review of plans, specifications, potholing report, geotechnical report, CEQA compliance report, NPOES compliance and other conditions required for adjacent residents and businesses to ensure successful completion of this project. CONSTRUCTION MANAGEMENT SERVICES Our staff will follow the general principles of construction management along with City standards by per- forming the following tasks for projects which are assigned to CSG: Project Coordination and Correspondence. Our staff will serve as a focal point for coordination and communication of all project issues. City of Redwood City I 1 0 -"-.,--_.~. ,- ~.-.~,_..._-_. .. ."-"'.~"'^'~'---"~, ._;.,._"~._~.,~_.~._-" -