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May 10, 20 10 <br />Mr. T y Gob-;in <br />Page <br />Based on these observations it will then be passible to assess mitigation options for the storn sewer <br />pipe, which will include complete or partial lining of the storm pipe, possible re-grading in the <br />vicinityofthe outfall, or installation of a butte s or other retaining structure in that vic nity. Options <br />for retaining, structures will be assessed using slope stability computer modeling. <br />The cost proposal for this work is based on the casts associated with the assessment of the slope <br />movement below 505 Montara Way. The assessment portion or that work as S 13,475.00. It is <br />anticipated that the proposed work on the star /sanitary seer w ill require approximately the same <br />amount of time. A little more time may be spent in order to conduct the review of the pipe videos. <br />If you have arty questions regarding this matter, please do not hesitate to contact me at (541) 607- <br />570. <br />Sincerely, <br />GeoScionce, Inc. <br />Gun ar Schlieder, Ph.D., CBG <br />