1995 JT MIN JUL 10 - Laserfiche WebLink

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said this is an important factor as he begins to explain the corrective measures or options that are necessary. Mr. Mowry stated the City of Colton staff provided CH2MHILL with all the background information that is available; the original design drawings, the Cease & Desist Order and all permits issued to the City over the last several years. He said CH2MHILL staff came to Colton and reviewed each of the unit processes at the plant to determine the current condition of the facilities and to confirm that what was on the drawings was actually in the field and that the report is a summary of their study. Mr. Mowry said the Executive Summary is basically what is in the whole report under various items. Mr. Mowry said some of the items may not be required for redundancy and reliability per the Title 22 requirements, but many times when upgrades are done to an existing facility, new regulations; such as from Air Quality Management, may apply and it may be necessary to look at that. Mr. Mowry gave the example of covering the grit chamber, one would say that this does not have anything to do with reliability of treatment and that the plant can run effectively without covers; however, this is the primary source of volatile organic carbons that may come from the aeration of the raw sewage and could cause the City to have a violation. Councilmember Hutton asked if Mr. Mowry could address hydraulic reliability and its effect on the three plants. Mr. Mowry reported that in the Title 22 requirements, it has a statement regarding hydraulic reliability meaning that if any one of the facilities is out of service you can still treat your wastewater effectively. Mr. Mowry said this was the key to why he pointed out that each plant is separate and individual and are not interconnected. Mr. Mowry gave a worse case scenario with Plant 2 with a 3 MGD capacity being out of service. He said if this were to happen, the City would lose almost 50% of its capacity. Mr. Mowry said the City must have a redundancy and reliability, to allow itself the capability to handle the additional flow if Plant 2 were to be out of service. Mr. Mowry said if any unit in any plant goes out, the City loses the entire plant because there is no ability to take flows from one plant to the other or to share plant units. He said this requirement is the critical point and will be one of the major cost items once the report is finished. Mr. Mowry said the City is looking at having to have an additional 3 million gallons of capacity to be added to the existing plant, not to expand the plant, but simply to make the plant a reliable Title 22 treatment facility to meet the permit requirements. Mr. Mowry stated he had discussed this issue with Mr. Adelson to see if there were other alternatives and it is their opinion that there are very few options. Councilmember Sanders asked if CH2MHILL was offering as part of their report an integrated plan; whereby if Plant 2 did fail, there would be backup systems in place. Mr. Mowry said one way to do 5 JUL 1 0 1995