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—r CRO <br />FUGRO CONSULTANTS, INC. <br />1000 Broadway, Suite 440 <br />Oakland, California 94607 <br />Tel: (510) 268-0461 <br />Fax: (510) 268-0137 <br />July 25, 2014 <br />Project No. 04.72140027 <br />Carollo Engineers <br />2700 Ygancio Valley Road <br />Walnut Creek, California 94598 <br />Attention: Mr. Rick Chan & Zaheer Shaikh <br />Subject: Cost Modification Request, Geotechnical Engineering Evaluation, WPCP Former <br />Polishing Pond Equipment Pad Project, San Leandro Water Pollution Control Plant, <br />San Leandro, California <br />Dear Mr. Chan & Mr. Shaikh: <br />Fugro Consultants, Inc. (Fugro) is pleased to present this cost modification request for <br />design services associated with the WPCP Former Polishing Pond Equipment Pad Project. The <br />original vision for the project was to create an equipment storage area at the west end of the <br />existing polishing pond. During our initial geotechnical evaluations of the equipment pad area, <br />additional substantial geotechnical considerations were encountered. These additional <br />considerations include: <br />• Impacts to fuel lines (settlements). Placement of fill adjacent to the south levee (which <br />has active Kinder Morgan pipelines) will result in settlements that may stress and deform <br />the pipelines. <br />• Removal of effluent culvert. An existing culvert exists that allows effluent water from the <br />polishing pond to drain to the bay. The culvert will need to be decommissioned. This <br />culvert traverses under the Kinder Morgan pipelines, so extra care must be taken during <br />the decommissioning process to prevent impacting these pipelines. <br />In response to these considerations, the City of San Leandro (City) requested Fugro <br />evaluate situating the new equipment pad in the east end of the polishing pond. This resulted in <br />additional geotechnical and environmental evaluations to develop conceptual sections, <br />construction approaches, and analyzing slope stability & settlements. <br />A member of the Fugro group of companies with offices throughout the world. <br />i3P 9Upt <br />C eniRcam hJp. xYQg Crrc&xr Na.OH. IE56 <br />