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OTETRATECH <br />EXHIBIT A -2 <br />SECOND AMENDMENT TO CONTRACT <br />San Lorenzo Sewage Lift Station <br />Agreement No. A -2005 -142 <br />Additional Services Request <br />BACKGROUND <br />Tetra Tech has been working with the City on the San Lorenzo Sewage Lift Station Project since June <br />2005 under Consultant Agreement No. A -2005 -142. Amendment No. A- 2006 -107 was approved on <br />May 2006 and provided for additional geotechnical services to handle hazardous materials and the <br />preparation of renderings. The City approved an additional services request dated July 17`h, 2007 which <br />provided for the following: additional structural modifications; additional plan check and permit effort; <br />additional construction phase support due to the structural modifications; and delay in construction <br />phase support (assumed construction would be completed by December 2009). Tetra Tech completed <br />the plans and specifications in March 2009. <br />The City of Santa Ana is now proceeding with the preparation of an EIR for the project. The City is <br />requesting Tetra Tech to provide some assistance during the EIR process, as well as some additional <br />work on the Plans and Specifications. By this correspondence, Tetra Tech is requesting the City <br />increase the approved budget to compensate us for these additional services. <br />ADDITIONAL SERVICES <br />Task No. 1: EIR Assistance. Tetra Tech will provide assistance to the City's environmental firm <br />(T &B Planning) with the preparation of the EIR. The total time frame including public review periods <br />is estimated to be ten (10) months. We have assumed the following level of effort on a monthly average <br />will be required: one (1) hour of a Senior Project Manager (Tom Epperson) and one (1) hour of a <br />Project Manager/Engineer (Mark Bush) for the ten (10) month duration. In addition, Tetra Tech will <br />provide written responses to all public comments on engineering issues. We are requesting a budget of <br />$8,700 for this additional service. <br />Task No. 2: Attend EIR Meetings. We are assuming that Tetra Tech will be requested to attend three <br />(3) meetings with T &B to discuss the project and respond to specific items of concern (project <br />overview meeting; meeting to discuss major issues; and meeting to discuss response to public <br />comments). We are requesting a budget of $2,100 for this additional service. <br />Task No. 3: Estimate Construction Durations for Various Stages of Construction. Tetra Tech will <br />provide estimate of construction duration for the various stages of construction (i.e.: excavation of wet <br />well and dry pit; construction of underground portion of lift station; permanent westbound lane closure <br />on Segerstrom Ave.; construction of above ground portion of building; construction of gravity sewers <br />and force main; and demolition of old lift station). We are requesting budget of $1,700 for this <br />additional service. <br />-zr.. Tech, 1= r.. <br />16241 L ?gun? Car,yorl' Read. Suite 20� . Irnne. CA 92':18 <br />^49.727.7x393 F;x 94:3.727 7097 :,anv ;etratech-com <br />