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ONE BROADWAY PLAZA PROJECT EIR ADDENDUM <br />CITY OF SANTA ANA <br />5. Environmental Analysis <br />Table 13 Proposed Project Water Demand <br />Land Use <br />Unit Water Demand <br />Factor <br />Project DU, capita or <br />Acreage <br />Daily Water Usage(gpd) <br />Office (commercial) <br />0.09 gpd/sf <br />259,002 sf <br />23,311 <br />Apartments (high-rise residential) — 415 units <br />110 gpd/capita 2 <br />440 capita 3 <br />48,400 <br />Total Proposed Water Demand <br />71,711 <br />Total Current Entitled Water Flow <br />(46,621) <br />Project Net Water Demand (Project — Current) <br />+25,090 <br />Notes: <br />I Unit Water Demand Factor was taken from the City of Santa Ana Transit Zoning Code EIR (0.09 gpd/sf) <br />2 Unit Water Demand Factors was taken from the City of Santa Ana Water and Sewer Design Guidelines (110 gpd/capita) <br />3 Capacity was assumed at 1 person per bedroom (440 capita) for the 415 apartments <br />The Proposed Project would incorporate Mitigation Measure U-7, which requires the developer to pay their <br />fair share amount for the necessary facilities to accommodate project -related water supplies, and Mitigation <br />Measure U-10, which requires the project developer to pay all costs for the construction of a new 8-inch <br />waterline. The Department of Public Works has reviewed the Water and Sewer Study and determined that with <br />incorporation of identified mitigation measures no new significant impact would result from the <br />implementation of the Proposed Project. <br />c) Result in a determination by the wastewater treatment provider which serves or may serve the <br />project that it has adequate capacity to serve the project's projected demand in addition to the <br />provider's existing commitments? <br />Less Than Significant Impact/No Changes or New Information Requiring Preparation of an EIR. <br />There is a 15-inch sewer line adjacent to the Project Site and running along N. Broadway. Table 14 below <br />outlines the proposed conditions for wastewater service. The Proposed Project's estimated wastewater <br />generation is 72,727 gpd. <br />Table 14 Proposed Project Wastewater Generation <br />Land Use <br />Unit Water Demand <br />Factor <br />Project DU, capita or <br />Square Footage <br />Total Average <br />Wastewater <br />Generation(gpd) <br />Total Peak Flow <br />Wastewater <br />Generation cfs 2 <br />Office (commercial) <br />0.0765 gpd/sf <br />259,002 sf <br />19,814 gpd <br />0.09 cfs <br />Apartments (residential) <br />127.5 gpd/unit <br />415 units <br />52,913 gpd <br />0.25 cfs <br />Total Proposed Wastewater Generation <br />72,727 gpd <br />0.34 <br />Total Current Entitled Wastewater Flow <br />(39,628) gpd <br />(0.18) cfs <br />Project Net Wastewater Flow (Project — Current) <br />1 +33,099 gpd <br />1 +0.16 cfs <br />Notes: <br />1 Unit Water Demand Factor was taken from the City of Santa Ana Transit Zoning Code EIR (0.0765 gpd/sf & 127.5 gpd/unit) <br />2 Peak Flow = 3 * Average Daily Flow <br />Apri12020 Page 95 <br />