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Wastewater gravity discharges from the DAF clarifier to a pH adjustment tank <br /> where a pH monitoring system and controller delivers sulfuric acid as needed to <br /> reduce pH levels to acceptable condition for discharge. After pH adjustment, <br /> treated wastewater gravity discharges through a flume and wastewater sampling <br /> point. Flow monitoring and pH recording devices are located in this area to <br /> provide continuous monitoring of the wastewater discharge to the sanitary sewer. <br /> Solids generated from the clarifier will be treated with a filter aid to enhance <br /> dewatering. A 1,480 gallon sludge conditioning tank is utilized to transfer sludge <br /> to a 25 cuft. plate and frame filter press to increase solids concentration from <br /> approximately 1.5 percent to 45 percent. The filtrate will drain to a 935 gallon <br /> oil/water separator. Lighter-than-water non-aqueous phase liquid from the solids <br /> filter press will be contained in 55-gallon drums. Wastewater filtrate from the <br /> filter press operation will be returned to the wastewater pit for reprocessing. The <br /> dewatered solids are transported to an approved landfill for proper disposal. <br /> System Operating Guidelines: <br /> Initial and date all recording charts daily prior to operation. Change charts if <br /> necessary at beginning of each week. Store/file all chart recordings. <br /> Clean pH probes daily. <br /> Calibrate daily with buffer solutions 7 & 10. Maintain log documenting name of <br /> individual cleaning, and calibrating. <br /> Plug-in power supply to pH acid pump located at side of pH tank. This should be <br /> disconnected each night at shut-down for safety purposes. Always wear <br /> appropriate PPE (Personal Protective Equipment) when working around acid and <br /> all other chemicals. <br /> Check DAF filter basket strainer and clean as needed. <br /> Verify equalization tank level and start operation of system when equalization <br /> tank is at 22.0 ft. Turn on all equipment identified on the WW panel "ON" Check <br /> skimmer drive speed. <br /> Restart refrigerated auto composite sampler. Place sampler in run mode. <br /> Complete daily operation log for all equipment and conduct chemical feed rate <br /> draw-downs minimum once every two hours. <br />