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ENY[EONMEPTAL IMPAO'r E?POET ADDENDUM .'AFMBTSONC.YANCN' 2EYI3ED.PnOJECT <br />BEPTCMDEE9dV SpNTAANA. ,CA61BOgyIA <br />Compliance }volt conditions orpermlt requirements estahlishcdbythe City, as"well as WD <br />outlmed by the Santa;Ana RWQCB, }t ould ensure that wastewaterdischarges from the Project. <br />sitz and treated by the wastewater'treaftnent facility system would not ciceed applicable Santa <br />Ana R1VQC'.B waster;datertrea[mzutrIe Wrehfents. In addition, using the'samegeneratioii rate. <br />provrdetl iii the Certified EIR (1,488 gallons:perday' [gpd].pei acre for restdential uses);"the <br />residential uses for the Revised Projectare anticipated to generate as additional 4,613 gallons of. <br />wastewater perday (gpd).wWell would be 0.005 percentor the remaining the treatment capacity - <br />of the OCSD Reclamation Plant No. l S1 The Revised Project would reduce die size of the church <br />campus which would reduce wastewater generated from this use: Therefore; the increased <br />was(ewater. flows from the Revised Project.can be.accommodated within the:existillg,design. <br />c.ipacity of Reclamation Plant No. I and would not result iii Reclamation PlanfNo.I exceeding its <br />wastewatertieatment r'eguiremeiits: Additionally, wastewater generated from the Revised Project <br />would be typical of w•astetvater flows:in the City and of existing floti s from-tlte Projeot site. <br />Comparatively, the Certified EIR determined that the Approved Project would result in the <br />generation of 41;2$8, gallons of }wastewater per day; which would be within the treatment <br />capacity :of the OCS Iteclamation'P1ant No. 1. Therefore, the Revised Project would not result in <br />new significant impacts beyond diose Edeutifred in the Certified EIR, No new mitigation Es <br />required. <br />b) Water. The 'City's main sources of water -supply arewater from the O611pCountp writer <br />Distriet (QCWD) andtheMetropolitan Water District of Southe i California (M MD) prtiridcd <br />by the Municipal. Water District of Orangc County: According to the Certified EIR, the Ciiy.relies <br />on 75 percentavater,from the OCNID and 25 pt7cent of water from M%VD. According to the <br />City's. Draft 2015 lrban'Water Management Plan (UWNiP), it is projected that by 2040, , <br />groundwater supply lrcnnalic OGWDavould account for approximately70;perccnt of the City's <br />total water demand. Imported -water from the MWD and,recycled water would account.far the 29 <br />percent and 0:7 percent,•respectively, of the,City`s water demand. Accordine to the Draft2,015 <br />UWMP, the City's wbier supplies. are, projected to,ineet Rill senvice demands:dtiougli the year <br />2040. <br />The Certified EIR determined that the Approved Project's,water.detnand would be similar in <br />quantity lo.the Approved Project'"s wastewater demand. The Certified EIR also noted4hat the <br />Approved 1'rojectwould not result ill increased demands oil-watersupplybeyond that already <br />projected. The Certified EIR determined that existing water mains could serve tlteApproved <br />Project. The Ravtsed Project o ould doe elop the site with 42 single-family residential units, which <br />would equate to u projected water demand of approximately 10,574 gpd (I I O.percent of the <br />wastewater generation rate). The Revised Project would reduce the size of the.church camps.which would redtice,water detna.nd of this use. According to the Draft 2015 U W MII, water <br />demand prlijections are developed based on available data as well as land use, population and. <br />economic, growth: The.Revised Project would be consistent with the General Plan land use. <br />designation of Low Density Resider tittl and is within SCAG's growth projections,'llterefore; the. <br />Reclamation Plant No. I has.aciesign capacity of 320 mgd, with a daily flow of 130 ntgd'and a remaining <br />treatment capacity, of 190 mgd. <br />Plcasc note that`an error in calculatioirs in Table 3.l 1-1 of the.0e66fied EiR determined Kiat using I <br />generation of 1,488 gpd per acre multiplied by 23.81 aerrs_would grialc to 1,512. Consequently, the total. <br />wastewater dcmaud for the Apprm�ed Project was reported to be 7;371- gpd, "rather than X11,288 g64. <br />PASHO 16a4%Addcndum Addend"Wmx ee9.05.!17,� <br />75B-120 <br />2-71 <br />