Reso13 PC 13-24 2920 PC Reso-Adopt the Intitial Study MND - Undercrossing

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'Environmesatal�nalysif • Foorings far the cantilevered xetaining wall that bear on subgra�e soils below an elevarion oF 7 feet shou}.d derive all vertical resistance (down�,vaxds and up«'axds) from micropiles. Any resistance to vertical loads for foorings bearing on subgtade soils below an elevation of 7 feet should be neglected. + Foorings that bear on subgrade soils above an e�evarion of 7 feet may be designed using an allowable bearing pressure of�,000 psf. • The Contractor shall be�esponsible for the design of the temporary shoring needed for the construction of the wet well and retaining walls in conformance with the Caltrans Trenching and ShoringManual. The Contractor's s�oring design should be performed by a xegistexed civil engineer and submitted to the City fox review pnor to construcrion. • The Contractor shall be responsible for the design of the temporary cofferdam needed ta dewater the site to construct the joint-use path.under US 101. "The Contractor's cofferdam design should be performed by a registered civil engineer and submitted to the City for review prio�to construction. • The site is potentially corrosive to reinforcang steel embedded in concrete structures. A corrosion engineer shouid be consulted to adjust the concrete mi�c accordingly. With the incorporation of these measures the impacts from unstable and expansive soils would be reduced to less than significant levels. (Less than Significa�t Impact with Mitigation Incorporation) d)Be located on expanstve sarl, as defined irr Table 18-1-B ofthe U�fors�Building Code (1994), creating substa,t�tral risks to life or propetty.� See the discussion of expansive soils in the analysis of item c) above. (Less than Significant Impact with Mitigation Incorpoxation) e)Have sorls incapable ofadequately supporttng the use ofseptic tanlcs ot alretrlative waste water dispasal systems whete sewers are not available for the disposal of waste watet.� The pxoposed project would not involve the disposal of waste water or septic tanks,and there would be no impacts from soils incapable of suppo�ring septic tanks. (No Impact} 2.7 GREENHOUSE GA5 EMISSIONS The US 101 Pedestrian Undercrossing and Bair Island Storm Dxain Pump Station Project Air Qualiry and Greenhouse Gas Report describes the greenhouse gas regulations applicahle to the project, esiimates the emissions of greenhause gases during construction and operarion of the proposed project,and identifies mitigation measures for these emissions (see Appendix C)• Greenhouse gases include carbon dioxide,nitrous oxide,methane,hydrofluorocarbons, perfluorocarbons,and sulfur hexafluoride. Each of these gases has a different potential far trapping heat in the atmosphere and contributing to glabal warming. For example, accoxding to EPA, over a �� ry3 US 1 D 1 Pede.rtrian Undercrossirag and 8air Lrland Aoad Storm Drair�Pump Statzon Project