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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 />