AgdaPkt 2013-09-23 Closed and Regular

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8.A. - Page 372 8.A. - Page 130 to consider the potential for a deep-seated landslide comply in the eastern area of the developmerrt and to identify mitigatlon measures that would be adequate to prevent structural damage to homes In that area. 2. Hlstorkai evidence 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 Redwood City report, March 17,1992). t The residence was determined to be unsafe for a two year period, as a result of slope stability issues, according to a resident of the nelghbodwod. The resident also informed me that another hillside house, on The portion of Vista Road, directly above the house at the end of the unpaved portion of Laurel Way (3769), slipped off its foundation (reportedly 30 -plus years ago) and was condemned and later torn down. Again, the DEIR needs to be revised to consider the potential for a deep-seated landslide complex in the eastern area of the development and mitigation needs to be identified to prevent structural damage In that area. 3. The potential for landslid Ing and slope Instability to be heightened during a nine-year continuous construction period when portions of the hillside would be exposed to Increased erosion is not addressed. iMitigation of potential impacts from slope movement are deferred, for example, mitigation measures Geology -1 and Geology -2 call for design -level geotechnical evaluation that will be submitted only afiter the project Is approved. The EIR simply doesn't address them, but puts them off for future reports. The Planning Commission does not have sufficient Information an which to base Its conclusion that "no significant Impact" will result from the project. 4. Slope stability will be compromised by the removal of 91 mature trees, most of which are on steep slopes. The EIR does not discuss the extent to which the tree root systems are connected to soil stability. The EIR falls to address the significant potential risks of landslides resulting from removal of nearly all the trees (mature and not mature) from the site for purposes of road and home construction. Replacements trees will take years to establish root systems and will do nothing in the Interim to mitigate the damage from Instability and slides. The impact from the loss of the protective tree canopy similarly is not addressed. Failure to Disclose Potentially Hazardous Soil Conditions 5. Environmental due diligence of the site is Inadequate. For example, the potential for soil contamination was not examined in the Phase I EnAronmental Site Assessment (ESA). Nearby operation of mercury mines In the 195Ws is well documenteds as is the more recent discovery of mercury residue 4 This evidence strongly suggests that