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TETRA TECH EXHIBIT "A" San Lorenzo Sewage Lift Station Agreement No. A-2005-142 Additional Services Request BACKGROUND Tetra Tech has been working with the City on the San Lorenzo Sewage Lift Station Project since June 2005 under Consultant Agreement No. A-2005-142. Amendment No. A-2006-107 was approved on May 2006 and provided for additional geotechnical services to handle hazardous materials and the preparation of renderings. The City approved an additional services request dated July 17"', 2007 which provided for the following: additional structural modifications; additional plan check and permit effort; additional construction phase support due to the structural modifications; and delay in construction phase support (assumed construction would be completed by December 2009). Tetra Tech completed the plans and specifications in March 2009. The City of Santa Ana is now proceeding with the preparation of an EIR for the project. The City is requesting Tetra Tech to provide some assistance during the EIR process, as well as some additional work on the Plans and Specifications. By this correspondence, Tetra Tech is requesting the City increase the approved budget to compensate us for these additional services. ADDITIONAL SERVICES Task No. L• EIR Assistance. Tetra Tech will provide assistance to the City's environmental firm (T&B Planning) with the preparation of the EIR. The total time frame including public review periods is estimated to be ten (10} months. We have assumed the following level of effort on a monthly average will be required: one (1) hour of a Senior Project Manager (Tom Epperson) and one (1) hour of a Project ManagerBngineer (Mark Bush} for the ten (10} month duration. In addition, Tetra Tech will provide written responses to all public comments on engineering issues. We are requesting a budget of $8,700 for this additional service. Task Na. 2: Attend EIR Meetings. We are assuming that Tetra Tech will be requested to attend three (3) meetings with T&B to discuss the project and respond to specific items of concern (project overview meetin ~ meeting to discuss ma'or issues: and meetin to discuss res once to ublic s, ~ ~ ~ r r comments). We are requesting a budget of $2,100 for this additional service. Task No. 3: Estimate Construction Durations far Various Stages of Construction. Tetra Tech will provide estimate of construction duration for the various stages of construction (i.e.: excavation of wet well and dry pit; construction of underground portion of lift station; permanent westbound lane closure on Segerstrom Ave.; construction of above ground portion of building; construction of gravity sewers and farce main; and demolition of old lift station}. We are requesting budget of $1,700 for this additional service. 'hi3 ~dy.l. .it ~`[z!;Y').i dvi. J._'1e: ~t 1 I. ~ .r t F`4 3tF;1 f3 ~:}3 _'.'t~~. z ~'i `-~.'%l.,+Jf}7 i~;~=~2Y.'E?#t~}'?i;,'°'v +rYJY't 25A-8