Agmt12 G&E Engineering System Inc.

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100% Design Redwood City will perform a detailed design review of the 90% submittal. Consultant will meet with Redwood City staff to review comments on the 90% review. Consultant shall make all necessary revisions and modifications to the 90% Design as agreed upon befinreen Redwood City and Consultant. These revisions and modifications will be incorporated into the 100% Finalized Plans, Calculations and Specifications. All comments shall be either incorporated, or responded to if not incorporated. Consultant shall finalize all construction documents for bidding (i.e., plans and specifications) and shall finalize the Engineer's Cost Estimate. Expanded Original Task 4 - Peninsula 2 Tank Modifications Consultant has prepared an investigation of the Peninsula 1 and 2 tanks (Ref. G&E report 70.04.05, Rev. 0, dated September 18, 2013). That report recommends the following seismic upgrades (moderate / high to high priority): • Task 4a - Peninsula 2: Modify inlet / outlet pipe, drain pipe, overtlow pipe. (High or moderate/high priority) • Task 4b - Peninsula 2: Add external pile system (moderate priority, optional). The work scope below address both conditions. 50% Design Submittal We will prepare drawings and specifications for the designs to be implemented for Peninsula 2 as described in the above report. It is understood that after the 50% submittal, the City may decide to go forward (or not)with the pile upgrades. Final drawings shall be printed in D size (24x36 inch) format, set up to produce half size prints at B size (11x17 inch) format. We will perform tank analyses (nonlinear dynamic models of existing tank with added piles) with the assumed upgraded piles, to demonstrate that under the 2,475 earthquake that the combine system (existing and new piles) that the existing piles had demand ductility under 3. We will submit a tech memo with the findings. The list of drawings includes but is not limited to the following: ATTY/AGR/2014/AMENDMENTS/AMEND N0.1 G&E ENGINEERING REV:03-21-14 VR Page 7 of 13