FIELD DOCUMENTS_1982-1985 - Laserfiche WebLink

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Brad Parsons -2- March 8, 1984 Generator Inspection - Marley Cooling Tower The treatment process used in both the past and at present is to place the wood in the retort, pull a vacuum, add the treatment chemical, add pressure until the proper retention of the chemical is achieved, pull a vacuum to remove the excess chemical, and then remove the wood and allow it to remain over the drip pads for about three (3) hours. The wastes generated at this facility are sludge from the mix tanks, rainwater runoff contaminated with chromium and copper, and sludge from the bottom of the percolation pond. The sludge from the mix tanks is cleaned out every couple of years and disposed of at the Class I landfill in Martinez. This waste is being manifested. An Extremely Hazardous Waste Permit is also being used due to the high levels of chromium, copper, and arsenic in the sludge. Contaminated rainwater runoff is captured in an underground sewage system and then pumped into a two.(2)-acre percolation pond. The runoff water is analyzed monthly for heavy metals. In the past, the level in the pond has been 20-21 feet deep during the winter. The sludge in the bottom of the percolation pond has never been analyzed to determine what levels of hazardous constituents are present. This sludge has also never been removed for proper disposal off-site. The floor of the retort pit is soil and has become heavily contaminated with heavy metals, according to sampling results taken by the Regional Water Quality Control Board and the Marley Cooling Tower Company. In order to prevent further contamination, metal open-top boxes have been placed beneath the openings of the retorts to catch any drippage of treatment chemicals when the doors are opened and the wood is pulled out. The drippage caught in these containers is piped back to the mix tanks . About a year ago, a collection system was put in beneath the drip pads. These collection systems discharge into the collection boxes beneath the retort openings. Also about a year ago, concrete retention walls were placed around the chemical storage tank and mix tank area. The base of the tank area is asphalt. The drain from the tank area is designed so that rainwater can be drained from the area into the sewage system and discharged into the percolation pond. However, if a spill occurs, there is a block in the drain which allows the material to be retained in the tank area and pre- vents discharge into the sewage system.