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8.A. - Page 130 ta consider the potential far a deep-sea�ed land5lide complex in the eastern area of the develo�ment and to idEntify mitigation measures t#�at would be adequate to preuent structural damage to homes in that area. 2. Historical e�idence of significant hillside instability is not addressed by the DEIR. The residence at 3726 Laurel Way was determined to be structurally unsafe in 1992 (City of Redwoad Gity report, March 17, 1992�. The residence was determir�ed to be unsafe for a two year period, as a result of slope stability issues, according to a resident o# the neighborhood. The resident also informed me that anot#�er h9lfside hause, an the portion of Vista Road, directly abo�e the house at the end of t4�e unpaved portion of l.aurel Way (3769), slipp�d off its foundation (reportedly 30-pi�s years ago) and was candemned and later #arn down. Again, the DEIR needs to be revised to consider the patential for a deep-seated landslide complex ir� the eastern area of the de�e�opment and mitigation needs to be identi#ied to prevent structura! damage in �hat area. 3. The potential far lar�dsliding anc! slope instability ta be heightenec� ciuring a nine-year continuaus constructian period when portions of the hillside would }�e exposed to increased erosian is not addressed. Mitigatian a# patential impacts from slape movement are deferred; for example, mitigation measures Gealogy-1 and Gealogy-2 cal[ for design-le�el geatechnical evaluatinn that will be submifted only after the project is approved. The �IR simply doesn't addres5 them, but puts them off for future reports. The Planning Commission does not have sufficient informatian on which to base its canclu5ion that "no significant impact" will result from the �raject. 4. 51ope stability wilf be campromised by the removal of 91 mature trees, most of which are an steep slopes. The �Ilt does not discuss the extent to wh�ch the tree raot systems are connectec� ta soil stabiiity. The EIR fails to addres5 the significant potential risks of landslides resulting fram removaf of nearly all the trees (mature and not mature) from the site far purposes of road and home constru�tion. Replacements trees will take years to establish root syster�s and will do nothing in the ir�terim to mitiga#e the damage from instability and s�ides. The impact from the loss af the pratecti�e tree canapy similarly is not acldressed. ��r�� c�� f'�t��ti�liy �N��°dc��s 5€�i� �� 5. �n�irorsmental due diligence of ti�e site is inadequate, For example, the po#ential for soil contamination was not examined in the Phase I En�ironmental Site Assessment (ESA). Nearby operation o# rnercury mines in the 1950 is well document�d as is the more recent discovery of inercury residue. This evic�ence strongly suggests that Z http.//documents.redwoodcitv.or�/PublicWeblinklQocView.aspx?id=113�47&�aae=5&&dbid-0 3 http://w+�vw.�ealracker.swrcb.ca.�tovinrofile reoort.aso?alobal id=T0608130897 ° h4tp://articles.sfaate.com/1999-01-26/news/17676319 1 mercurv-Qark-impro�ements-minine-ooeration