FULL PACKET_2018-06-19 (INCLUDES 25E EXHIBITS)

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Water Improvement Design and Coordination. Our utility design team along with.oursuboirsUltant, Hazen and Sowyet have Successfully, 0mpleted Water Infrastructure. projects for varlow igorrolas In. Southern California, These projects consist of Water main replacement, realignment, upilzing arid copsolty increase, master planning, existing system evaluation god and openfllorvil Support. Although each project Is urilque, the majority of challenging utility projects. we face are In developed areas where existing utility facilities ore located, WlJhIn thopropoSed project Area and any Imprwomont will generally effort or he Mratated.by the livoarflon.of uqlfty fpcilily, KirriaMorrit0loves In r1rowIng all VVIlty lines and features true to size In our plans to aid In Identifying conflicts early In tho design phase. We Will also pothole potential conflict locations when budgets allow, whichgIves a better understanding of the locations of the existing lines, and provide extensive coordination With the various utility 00m0ables. We also use 3-Droodslino rf LAIlItles to ldontll� potential conflicts iweagy stages, of Aoslon, This method has helped us to avoid discrepancies between construction docurlients.aod Actua�fteld.wndlfforrs that rosulfted to cost effective and timely manner oxeoution of projects. Sanitary Sawat Doilgh, Bowers will be dorsighod based on Orange County Sanitotloq District and City of Santa Ana's r0oulrements. All design crIlArfamIll be reviewed versus the provIous requirements Including sewerpipe alking, modeling end onalyplo,vower lino-OlIgnmert4nd rtopth� mirlmumg1opes, p1pa-materlals, bodding and franch.dosIgn, ondraquIred manholes. Krmjay�Horn will provide modeling based on assembled Information based on the exIsfirigi system and Incorporating proposed conditions It requested by the City. Results of the modeling end recommendation$ by Ktmley-Hom for project solotlons will then be submitted to the City for review and approval, Wel I Rehabilitation Design, A combination of three factors can cause water production decline. The III rst is a regional decline In Water elevations that shift the �startic"wator level downward. The Second Is a decline In Water levels In the local aquifer caused by continuous pumping, The third Is a decline In specific oapaofty oaused by a plugged filter pack or wall screen. The roglonal.dodne in water levels is not controllable and groundwater levels Will recover through natural recharge, The reduction In speciflorspacIty requires cQrrective action In the form of root cause evoluation, well redevelopment, and possibly modification to pump location and flow rate. The decline In spoolflo capacity could be assault of a reduction of pormqabl[Jty near the well screen. This type of permeability reduction Is often the result of b1ologloal foullng, cernoritaition, or the Intrusion of fine-grained aquifer send Into 11hogravel park surrounding the wall casIng. Well videos could confirm this, Migration of fine-grained aq ulfervand could be a root cause of the rapid decline In specific capacity The result of this Is that water volooftyclurIng pumping Is much %horin those sections of screen thatprodubothe most water, During pumping, small send particles mobilize -and migrate through thewell fillarpack and wedge Intothe pore space. reducing permeability In the flier pack. MlWmtlon of this Issue would Include careful wall development to remove the send and resettle thellifterpack and modification of pumping operations to reduce.sharp changes In water velocity that mobilize fine-grained aclulforsand. PrIorto redevelopment It Is.recommonded to review of the factors that can cause this reductlon In specific rapacity., The review Would Include assessment of biological and cementation plugging and review the original, well construction documents Including the Sieve analysis performed to size the Nor pack and the dally construction (if available), As part of developing a mItIgpt1on approach, spinner logs may be recommended to verify production zones. Environmental Studios. Our environmental services team provides complete natural resource regulatory compliance services for public works projects. Our environmental professionals have provided services for a wide variety of projects, including roadway, transit, transportation planning, green streets, complete streets, land development, storm drata, and water resources. They are well versed In all aspects of the development process from Phase I Environirrental Site Assessments to California Environmental Quality Act (CEQA) and National Environmental Policy Act (NEPA) KimlepMorn a TROG77025171 City or Santa Ana 25E-98