Titanium Ingot & Mill Operation

North pond was used for oil skimming and solids settling from treated wastewater and stormwater runoff. The pond contained approximately 760 cubic yards of PCB-impacted sediment. Sediment thickness ranged from four foot to one and half feet. Project consisted of water management by rerouting water to the South pond, pumping and treating over 700,000 gallons of water from North pond to South pond in accordance with the sites NPDES permit requirements of 40 NTU. Removing and dewatering over 760 cubic yards of sediment with a high-pressure filter press, resulting in 400 tons of PCB’s < 50 PPM filter cake for disposal at a RCRA subtitle D landfill. TSCA notification was required per Ohio EPA. Once pond was emptied, liner cleaned and sampled it was determined to remove the damaged liner and replace with 3300 square yards of 40-Mil HPDE geomembrane. A treatability study / bench test was performed on the bio-solids sludge prior to commencing operations. In-situ bio-solids were 20.33% by weight and we were able to realize a 68% reduction by weight, resulting in 64% cake solids by weight.