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CITY OF SANTA ANA <br />Well No. 32 Nitrate Mitigation and Rehabllilation Study <br />Sound attenuation <br />• Entry doors <br />Roof hatch <br />• Ventilation <br />4.3 Electrical Equipment Replacement <br />The electrical equipment will be located within the building to protect it from vandalism and weather. The <br />electrical equipment will include: <br />1. Main switchgear <br />2. PLC Control Plan <br />3. Variable Frequency Drive <br />4. Telemetry <br />5. Lighting <br />6, Programming <br />5. <br />We recommend either Alternatives 1 or 2, blending at Garthe Reservoir. This utilizes the 16 million <br />gallons of storage to blend the water qualities. In addition, depending on operating preferences, the City <br />can decide to continue to use Well No. 32 to augment the pressure in the local area or fill the reservoir. <br />This alternative appears the most practical and cost - effective to achieve the City's desired goal not to <br />waste approximately 2.1 million gallons of water while waiting for the nitrate residual to fall to half of the <br />MCL, maintain the desired pumping capacity of 2,500 gpm at Well No. 32 and minimize impacts to the <br />community at large. <br />P:tPe05990085Engineering \05\ Wen- 32- Nllnate- Mitlgationt mft Reponto2textdow 16 TETRA TECH <br />251 -34 <br />