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Cost Estimate for Geotechnical Engineering Services 1 rrrrac® <br /> Drainage Ditch Improvements — Battleground Estates ® La Porte, Texas <br /> July 5, 2011 ® Terracon Document No. P91110112 <br /> Page 4 <br /> attached unit rates in concurrence with your approval. Any project and /or scope changes requiring <br /> additional or revised analyses will also incur additional charges. We will provide you an estimate of <br /> additional charges for authorization prior to executing the scope changes. <br /> D. AUTHORIZATION <br /> Environmental Considerations. In an effort to reduce the potential for cross - contamination of <br /> subsurface media and exposure of site workers to contaminants that might be present at the site, <br /> Terracon requests that prior to mobilization to the site, the Client inform Terracon of known or <br /> suspected environmental conditions at or adjacent to the site. If adverse environmental conditions <br /> are present, additional expenses may be necessary to properly protect site workers and abandon <br /> borings that penetrate affected groundwater- bearing units. <br /> If Terracon is not informed of potentially adverse environmental conditions prior to performing the <br /> Geotechnical services, Terracon will not be responsible for cross - contamination of groundwater <br /> aquifers, soil contamination, or any modification to the environmental conditions to the site that may <br /> occur during our Geotechnical services. The Geotechnical Scope of Services described above is <br /> based on our assumption that the site does not pose environmental risks to the personnel <br /> conducting the Geotechnical exploration services. <br /> Agreement for Services. The work will be performed under a mutually agreed upon clients <br /> Agreement for Professional Services which will be signed once the budget estimate is accepted, <br /> and upon completion of review by our legal department. We will provide you with our comments, <br /> once our review is completed. <br /> We appreciate the opportunity to provide this document and look forward to the opportunity of <br /> working with you. <br /> Sincerely, <br /> Terracon Consultants, Inc. <br /> (Terracon Registration No. F - 3272) <br /> Ather Mohiuddin, P.E. <br /> Geotechnical Services Manager / League City <br /> Todd E. Swoboda, P.E. <br /> Geotechnical Services Manager / Houston <br /> Reliable im Responsive ® Convenient El Innovative <br />