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FINAL DRAFT PRELIMINARY REPORT (Connections to EOCF #2) Cambridge Facility Figure 3 shows the facility location and the corresponding proposed conveyance piping. The following is the proposed alignment: Waverly St. to Fairhaven Ave. to Tustin Ave. to St. Andrews Place to S. Grand Ave. to St. Gertrude Pl. to S Lyon St. to Richey Street to City of Santa Ana's SA-6 meter vault. Assuming 10 cfs excess groundwater, the EOCF#2 Discharge Water Main is proposed to be 18-inches in diameter and rated for 200 psi. The pressure reducing facility can be located within Tustin Ave. in the vicinity of the existing SA-6 MWD service connection. The PR facility is recommended to be located in the existing public parkway right-of-way or within an easement adjacent to the parkway. If not feasible or easement is difficult to obtain, it could be located within the street if there is open utility corridor. Figure 3 also shows the proposed MWD connection facilities at Santa Clara Ave. and Tustin Ave. These proposed facilities will include: proposed meter flow control vault with 18-inch modulating butterfly valve and magnetic flow meter; connection to the existing piping between the meter vault and connection vault, including one 18- inch valve (downstream side of the flow control vault) and one valve matching size of piping between the connection and the existing SA-7 meter vault; and new electrical and SCADA control facilities. The proposed flow control vault is recommended to be located in the existing public parkway right-of-way or within an easement adjacent to the parkway. If not feasible or easement is difficult to obtain, it could be located within the street if there is open utility corridor. 5.4 City of Orange City Yard Facilities Figure 4 shows the potential facility location and the corresponding proposed conveyance piping. The following is the proposed alignment: Almond Ave. to Lincoln St. to Palmyra Ave. to Tustin Ave. to City of Orange's OC-No. 42 meter vault. It should be noted that the proposed pipeline will need to be bored across the Santiago Creek (about 360 feet in length). Assuming 12 cfs excess groundwater, the EOCF#2 Discharge Water Main is proposed to be 18-inches in diameter and rated for 200 psi. The pressure reducing facility can be located within Tustin Ave. in the vicinity of the existing OC-No. 42 MWD service connection. The PR facility is recommended to be located in the existing public parkway right-of-way or within an easement adjacent to the parkway. If not feasible or easement is difficult to obtain, it could be located within the street if there is open utility corridor. The construction of the facility will have a large impact on traffic on Tustin Ave. Figure 4 also shows the proposed MWD connection facilities at La Veta and Tustin Ave. These proposed facilities will include: proposed meter flow control vault with 18-inch modulating butterfly valve and magnetic flow meter; connection to the existing piping between the meter vault and connection vault, including one 18-inch valve (downstream side of the flow control vault) and one valve matching size of piping between the connection and the existing OC-42 meter vault; and new electrical and SCADA control facilities. The proposed flow control vault is recommended to be located in the existing public parkway right-of-way or within an easement adjacent to the parkway. If not feasible or easement is difficult to obtain, it could be located within the street if there is open utility corridor. The construction of the facility will have a large impact on traffic on Tustin Ave. Batavia Plant Figure 5 shows the potential facility location and the corresponding proposed conveyance piping. The following is the proposed alignment: Batavia St. from Batavia Plant to Fletcher Ave. to Olive Road to Heim Ave. to Tustin Ave. to City of Orange's OC-No. 40 meter vault. It should be noted that the proposed pipeline will need to be bored across the storm drain channel within Fletcher Ave., bored under the railroad from Fletcher Ave. to Olive Road, and bored across Tustin Ave. (about 400 feet in length). Assuming 7 cfs excess groundwater, the EOCF#2 Discharge Water Main is proposed to be 16-inches in diameter and rated for 200 psi. Orange 9tq%9 1District/Moulton Niguel Water District 30 - 26 5/17/2W&A TECH Evaluation of Groundwater Conveyance Options 14