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i <br />5.13.5 Sewer <br />5.13.5.1 Environmental Setting <br />Sewage generated on the project site is presently collected <br />I <br />by an on -site 8-inch sewage line that extends south through the middle <br />of the site from Fashion Square Shopping Center to Roe Drive. This <br />i <br />8-inch line collects sewage from both Fashion Square and Mainstreet <br />Center. The 8-inch sewage line extends west along Roe Drive to Arnett <br />Drive where the line then extends in a northern direction for <br />�= approximately 100 feet. At this point, the sewage line crosses <br />underneath the Santa Ana Freeway to Jonquil Road. On -site sewage is <br />1s: <br />treated at the regional sewage treatment located in Fountain Valley. <br />There is also a 12-inch sewer main in Roe Drive that could <br />serve the proposed project. This line extends west from Main Street <br />along Roe Drive, south to the north side of Santiago Creek where the <br />�- main then crosses underneath the Santa Ana Freeway and extends in a <br />westerly direction. Although this 12-inch main does not currently <br />serve the site, it could provide sewer service to the proposed project. <br />5.13.5.2 Impacts <br />I Project Impact <br />J. <br />The existing uses on the site generate approximately 68,513 <br />t" gallons of sewage per day, assuming a generation rate of 100 gallons a <br />day per 1,000 square feet. As indicated in Table 48, the proposed <br />project is estimated to generate 490,000 gallons of sewage per day. <br />t <br />f The removal of Mainstreet Center and the construction of the <br />proposed project would result in a net increase in sewage generation of <br />f <br />L <br />r * John Burk, City of Santa Ana, Public Works Department. <br />** Ibid. <br />75D-3190 <br />