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7.9.2 <br />7.9.3 <br />7.9.3.1 <br />7,9.3.2 <br />7.9.3.3 <br />7.9.3.4 <br />7.9.3.5 <br />7.9.3.6 <br />7.10 <br />Building Layout/General Sequence <br />Pressure filter building layouts are included in Appendix G. The chemical rooms are located on <br />the east side of the building, with exterior doors accessible for deliveries. The electrical, <br />mechanical, and generator rooms are located in close proximity to each other to allow for short <br />conduit runs and motor controls. <br />The pressure filter layout occurs on one level. The raw water enters the building in pressure pipe <br />and chlorine and permanganate are added. The water goes directly through the filters under <br />pressure where the iron and manganese are removed. Fluoride, chlorine, and phosphate will be <br />added to the finished water. <br />Main Level <br />Chemical Rooms <br />Chemical rooms are clustered on the east side of the building with exterior doors to allow easy <br />access for chemical deliveries. It is expected that chemical rooms will be required for chlorine <br />gas, sodium permanganate, fluoride, phosphate, and possibly polymer to aid in backwash <br />settling. <br />Electrical Room <br />The electrical room contains the motor control equipment and electrical panels. The location of <br />this room in close proximity to the mechanical room and generator room provide for short conduit <br />and wire runs. <br />Mechanical Room <br />This room contains the make-up air, dehumidification, and HVAC equipment. The location of this <br />room on an outside wall provides space for air louvers. <br />Blower Room <br />The blower room contains the filter backwash blower. The backwash blower provides air which is <br />used to help clean the filter media during a backwash. <br />Office/Control Room/Lab <br />An office/control room/lab is provided for operators to have a SCADA computer to monitor and <br />control the water system. A lab sink and desktop analyzer will be provided to allow operators to <br />monitor water quality. The office is located in the front of the building next to the entrance, and <br />has lots of windows for natural light. <br />Generator. Room <br />A standby generator will be located in the generator room. The generator is capable of running <br />the water treatment plant in the event of a power outage or possibly for peak shaving (peak <br />shaving requires additional emissions compliance). The service entrance and automatic transfer <br />switch are located in this room. Two exterior walls are provided for intake and exhaust louvers. <br />Backwash Alternatives <br />Sand filters (gravity and pressure) require periodic backwashing to remove solids from the filters. <br />Backwashing one of the filters (either gravity or pressure) will consume between 40,000 and <br />FEASIBILITY STUDY -DRAFT RAMSY 154354 <br />Page 31 <br />