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TASK D : Geotechnical Studies/Reports/Boring— Review existing geotechnical report and prepare a comprehensive geotechnical investigation including adequate borings forproperdesign of proposed work. Obtain required permits to conduct geotechnical investigations and perform applicable lab test to provide information necessary for a comprehensive design. A draft copy of the geotechnical report will be provided for review and comment. Traffic control in accordance with W.A.T.C.H. Manual. TAS K E : Traffic Study/Report —As necessary. TASK F: Environmental (CEQA) —As necessary, TAS K G: Right -of -Way Acquisition and Temporary Construction Easements (TCEs) — Right -of Way acquisition as necessary. HZ will incorporate the preferred precise alignment into the Vi8 CADD Files. Plans will be evaluated and TCE's would be provided, if necessary. TAS K H : Drainage - Huitt-Zollars proposes to implement the recommendations from the draft Citywide FLO-2D model that accounts for backwater effects on the storm drain infrastructure. Sizing of the infrastructure will be based on both hydrology and hydraulic computations to be prepared as part of the drainage report. A preliminary drainage report will be created along with the 30% submittal. Afinal drainage report will be provided with the final submittal. TA S K 1: Water Quality Management Plan (WQMP) Sub -Task 1.1— The design will account for the 50% rule in the 2009 MS4 Permit, which requires treatment for 50% of added or replaced impervious areas. It will implement green street principles to the maximum extent practicable. If the underlying soil does not infiltrate we anticipate using the parkway to provide bio-filtration. HZ will prepare a Preliminary WQMP at the 30% stage that identify potential locations for LID BMPs and their interactions with the onsite storm drain network. HZ will develop the Preliminary WQMP into a Final WQMP consistent with the County's Technical Guidance Manual to accompany the final submittal. This will include an engineer's estimate of probable costs inclusive of material, freight, and maintenance for the selected BMPs. Sub -Task 1.2 SWPPP— Deferred: Construction Bid Task TAS K J: Plans, Specifications, and Estimates (PS&E) - HZ will adhere to city criteria, policies, procedure, and standards. PS&E includes three milestone deliverables — 30%, 60%, and Final. Each milestone will commence after HZ has received review comments from the previous milestone submittal. HZ will meet with the City after comments have been reviewed to resolve questions. All plan sheets will be prepared at 20 scale unless otherwise approved and noted. Sub -Task J.1 Street Improvements — HZ will match the precise alignment of the constructed street. Plans will include record information regarding utilities, obstructions, and appurtenant data. Sub -Task J.2 Traffic Design Street Signals Channelization Plan & Details — Plans will be completed to meet California MUTCD standard, signage will be evaluated and updated for proposed lane configuration. Temporary Traffic Control Plans — Deferred: Construction Bid Task Sub -Task J.3 Storm Drain Design - Drainage improvement plans will be prepared at the different milestones. Backbone storm drain profiles will be provided along with the 30% submittal. Profiles for lateral storm drains and storm drain detail sheets will be provided at the 60% and final submittals. Sub -Task JA Wall Design — Design of masonry wall height as specified by sound report or City but not to exceed 12 feet Sound Report — Provided by City Sub -Task J.5 Street Lighting & Electrical Design —Typically existing street lights are owned by SCE. If the proposed improvements relocate more than three street lights the proposed lights will be owned by the City of Santa Ana. Street lighting design standards will be coordinated with the City of Santa Ana prior to commencing the design. The design will be per City of Santa Ana lighting standards and consideration will be given to salvaging the existing light fixtures. Sub -Task J.6 Landscaping and Irrigation Design — Conceptual landscape and irrigation plans will be prepared in conformance with City of Santa Ana standards. Our landscape designers will work closely with our engineers to plan, design, and coordinate gateway features, public art, traffic, and pedestrian lighting, signage, and site amenities. Our team will coordinate with the City to responsibly design landscape and irrigation systems. Planting and irrigation will be mindful of water conservation standards. Sub-TaskJ.7 Dry Utilities — Undergrounding existing powerlines is possible if SCE accepts proposed switch locations. As described in the approach coordination with SCE would occur in two phases. Our current scope is limited to street design. HZ will coordinate City of Santa Ana Civil Engineering Services: RAP 23-030 13