31B - CUP - 1901 NORTH FAIRVIEW ST

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City of Santa Ana Environmental Checklist footage. This methodology determined that the project would generate a wastewater demand of 25,992 gallons daily or 0.0260 mgd at full operating capacity of Phase H. Sewer flow monitoring was conducted for 7 days In March 2012 to determine the existing wastewater flows within the reach identified in the City's Sewer Master Plan as MH F05 -004 to MH FOS -005, which is the reach with the highest depth of flow to pipe diameter Cd /D) ratio of the system sewing the site, and is identified as being planned for capacity enhancements in the Sewer Master Plan. As described above, the proposed project is expected to generate a wastewater demand of 25,992 gallons daily or 0.0260 mgd at full capacity of Phase 1I. This wastewater treatment need is already accounted for by OCSD. The project will be served by the existing Fountain Valley Wastewater Facility. The anticipated flows from the project at full capacity of Phase It of 0.0260 mgd, is approximately 0.00029% of the 97 mgd that is currently treated daily at the Fountain Valley facility. In comparison to the upgraded plant design capacity of 180 mgd, the project would represent 0.00014% of daily flows. As described in XVIi.a., the treatment plant design capacity can accommodate the proposed project, and the project would not result or require the construction of new wastewater treatment facilities. However, after reviewing the sewer flow monitoring data and the City's Sewer Master Plan, the City of Santa Ana Water Engineering Division has concluded that the existing 12" sewer main in Westminster Avenue, (between Clinton Street, and Harbor Boulevard) is at capacity, and cannot meet the sewer discharge need of the proposed project. Subsequently, and pursuant to the City's Sewer Master Plan, the City is beginning to design, bid, and construct a new upgraded replacement for the said sewer main in Westminster Avenue, The City's sewer improvement is anticipated to be completed by December 2012. Because the proposed project is not scheduled to connect to the sewer until January 2013 and will not commence school activities until August 2013, impacts related to sewer infrastructure is not anticipated to occur. To ensure that impacts to sewer services and facilities do not occur, Mitigation Measure UTL -1 has been included, which restricts operations of the project until it can connect to the City Sewer System after completion of the construction of the replacement sewer main in Westminster Avenue. With implementation of ULT -1, the project would result in less- than - significant impacts to wastewater facilities. Mitigation Measure UTL -1: The City of Santa Ana Planning and Building Agency shall not issue a certificate of occupancy to the proposed project prior to completion of the City's sewer main replacement and improvement project located in Westminster Avenue, between Clinton Street and Harbor Boulevard. c. Require or result in the construction of new stormwater drainage facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? Less -than- Significant Impact. The proposed project site is currently covered with large areas of impervious surfaces that consist of building pads, parking lot pavement, and concrete walkways. Smaller areas of landscaping exist along North Fairview and within the parking area. The proposed project would redevelop the site with school uses, which would result in 2% less impervious surfaces on the project site, and likewise result in a slight decrease in surface water runoff when compared to existing conditions. The proposed project is surrounded by urban and built -up uses that currently rely on existing stormwater drainage facilities. The current drainage pattern of the site includes sheet flow across the site to the curb along North Fait-view Street that directs flow to n mLduemy a fidreer mgn acnooi June 2012 Initial Study /Mitigated Negative Declaration 3.105 ICF00914.11 OOR