2002 AGN JUL 02 I21 - Laserfiche WebLink

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Item #21 CITY OF COLTON AGENDA REPORT ror rne Loiron Utility Autrionty meeting or juiy z, zuuz TO: HONORABLE CHAIRPERSON AND UTILITY AUTHORITY MEMBERS FROM: ERIC R. FRASER, DIRECTOR OF WATER & WASTEWATER OPERATIONS SUB3ECT: ACCEPTANCE OF THE WASTEWATER TREATMENT PLANT EXPANSION AND RENOVATION FACILITIES PHASE 1 AND 2 AS 100% COMPLETE AND AUTHORIZATION FOR THE DIRECTOR OF WATER AND WASTEWATER OPERATIONS TO FILE THE NOTICE OF COMPLETION DATE: 3une 24, 2002 BACKGROUND On April 7, 1995, the Regional Water Quality Control Board (RWQCB) adopted Cease and Desist Order No. 95-36 (Order), for the City to make certain improvements to the City's Secondary Wastewater Treatment Plant. As a result of the Order, the Council and the Utilities Commission moved quickly to determine a course of action to comply with the RWQCB directives. Krieger and Stewart was ultimately hired to perform all of the required design work. The State Water Resources Control Board (WRCB) approved the plans and specifications for the project and awarded a State Revolving Fund loan to Colton for the construction of the project. After the plans and specifications were approved by the WRCB, Plant No. Ts digester had to be drained due to a problem with the re -circulation pumps. At that time, the digester cover was inspected and found to be unsafe due to structural damage resulting from age. In reviewing the estimated construction cost ($400,000), staff requested Krieger and Stewart to add the digester cover to the expansion and renovation plans and specifications as a bid alternate. Adding the digester cover to the overall project saved the City money by cuffing the cost of the design of the plans and specifications ($50,000), bidding documents and construction mobilization costs. The expansion was designed to add 2 million gallons per day (MGD) in treatment capacity. Part of the expansion and the Order was to perform restoration and rehabilitation work on Unit 1 and Unit 2. The restoration and rehabilitation work on Unit 2 was completed in late 2000. Unit 1 was built in 1949 and has operated almost continuously since startup. The typical life expectancy for this type of facility is 40 years. The City's consulting engineers inspected the unit as part of their contract to determine the extent of the possible restoration work. Their conclusion was that the unit was deteriorated beyond their expectations. They recommended that the unit be taken out of service and replaced by new facilities, since it could be expected that the unit could fail at any time. DISCUSSION/ANALYSIS On March 21, 2000, the City Council approved an emergency change order to add an additional 2 MGD of capacity to negate the possible failure of Unit 1 and the consequences of falling below the required hydraulic reliability of 8 MGD. The contract for the expansion was awarded to Americon Constructors, Inc. All work as part of this contract has been completed and is in service at this time. FISCAL IMPA The expansion of the facility, was funded by a State Revolving Fund Loan and bond proceeds, and will be paid by rate increases in accordance with the State Revolving Fund Loan requirement of rates based -on -strength. Page 1 of 2 (w/Attachment)