ARCHIVED REPORTS XR0009921 - Laserfiche WebLink

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Corrective Action Plan Page 35 Potable Water Supply Water for cleaning and maintaining the groundwater treatment equipment is supplied from a hose bib (V-8) on a line tapped into the existing pipe that supplies potable water to the site (See System 26 on Figure 10 for location ) Secondary Containment Any process water that spills onto the treatment system slab (System 20 on Figure 10) is contained by 6 in high curbs (see System 21 on Figure 10) around the perimeter of the slab This arrangement provide a secondary containment capacity of approximately 2000 �i gallons A drain (see System 22 on Figure 10) passes through the curb so that any rainwater that falls onto the slab and does not evaporate can be released This drain is controlled by a shut-off valve (V-8) Electrical Power and Control Electrical power for the groundwater treatment equipment is supplied from a power pole (see System 15 on Figure 10), erected in one corner of the treatment system enclosure The 48OV, 3 phase supply is metered at the pole A hole in the fence (See System 16 on Figure 10) that encloses the treatment system slab permits the electric meter to be read without the service person having to entering the enclosure wschematically, in sin le- The required electrical power and signal connections are shown g line form, on Figure 11 The general layout of the conduit racks (which also carry the pipes that carry water around the system) is shown on Figure 10 (see System 18) The principal electrical power switching boxes, power distribution and control panels (that house the requisite motor controllers, control instrumentation, electronic switching equipment and system status indicators for the various element of the groundwater treatment system) are also shown schematically on Figure 11 They are mounted together on the main power and control board (System 17 on Figure 10) Minor control panels and boxes, such as that for the vertical silica-media filter system and the sand-bin pump, are mounted locally on the equipment that they control The power line from the power pole to the main power and control board is bifurcated in a gutter Power in each of these lines can be shut off at a 480V disconnect One branch provides 480V, 3 phase power to the air stripper blower and discharge pump motors via the air stripper module control panel The second branch connects to a step-down transformer that outputs 240V single phase power to a distribution panel Electrical power is routed from the 240/120V distribution panel to the groundwater, booster and sand-bin pumps via their respective control panels Power is supplied to flow meters, water level sensors and other electronic instrumentation after being stepped down to 24 volts