1995 JT MIN JUL 10 - Laserfiche WebLink

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Discussion. Possible Action Title 22 Report on the Water Ouality Control Plant. Prepared by CH2MHILL Director Tom Clarke reported included with tonight's Agenda was the Executive Summary Report prepared by CH2MHILL. Director Clarke stated the complete text of the report was sent to everyone this morning. Mr. Bruce Mowry, CH2MHILL Project Manager for the Colton Project, presented a revised Draft Report. Mr. Mowry stated this project is on a very fast track and new versions of the report are being generated almost on a daily basis. Mr. Mowry said the version he brought tonight are slightly different from what the Council has; however, there is no substantial changes. He said one or two more revisions will be made on the report, the report is required by the Regional Board by the Cease & Desist Order issued on April 7, 1995. He said the report is due on July 15 and the Regional Board has consented that since this falls on Saturday, it will be due to the Board on Monday, July 17, 1995. At the prompting of City Manager Martinez, Mr. Mowry reported that coordination has been taking place with the Regional Board as the work on this report was occurring. He said he has talked with Mr. Mark Adelson, of the Regional Board Enforcement Department and that Mr. Adelson had received a copy of the report from the City. Mr. Mowry presented an overhead projection of a schematic of the City's wastewater treatment plant consisting of three independent plants. He explained the methods used to transport wastewater to the plant from various locations throughout the City and from Grand Terrace. Mr. Mowry briefly explained the unit processes from receipt of the wastewater through pipelines into a lift station and going through a grit chambers unit to a mechanical bar screen, to the flow splitter where it is split into the various plants. He said once split, the wasterwater in Plants 1. and 2. go through a claerator unit into a secondary clarifier and then through a chlorine contact chamber with final destination being the Santa Ana River. At Plant 3, Mr. Mowry said, the wastewater when split goes to an oxidation ditch, then to the secondary clarifier before going to the chlorine contract chamber and to the Santa Ana River. He said at the same time a number of sludge trains are being produced; when the wastewater is treated, sludge is produced. The sludge is all processed through a processing facility using an air thickening process to remove the water and then it goes into three digesters to stabilize the sludge before it goes to the sludge drying beds, with disposal being accomplished by truck. Mr. Mowry said the main point he wanted to emphasize was that all three plants operate as separate, individual plants; meaning the clarifier at one treatment plant cannot be used at another plant because it is not piped to allow that, the hydraulics are not setup and the design was not done to do any interconnection. Mr. Mowry 4 JUL 1 0 1995