Agmt03 Camp Dresser & McKee CDM - Laserfiche WebLink

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Mr. Chu Chang August 19, 2003 Page 2 will extend beyond the sandbag barrier wall. In order to prevent pump cavitation and to control flow, the 10" discharge pipe off the pump will be fitted with a gate valve. A 10" header pipe will be installed after the valve and two 8" discharge pipes will be plumbed into the header pipe in a manifold arrangement. One of the 8" discharge pipes will be fitted with an 8" flowmeter capable of reading instantaneous flow. It is assumed the other discharge pipe will flow at the same rate, and a total flowrate can be determined by multiplying the flowmeter reading by two. The City will retain the valve and flowmeter after completion of the test. The pump will be powered by a rented trailer mounted Ingersoll Rand 40 kW diesel powered generator with a day tank capable of allowing the generator to run 24 hours. CDM will start up the generator and operate the pump to ensure proper operation. After t is determined that the generator and pump are working properly, City personnel will be responsible for daily operation and maintenance and starting and stopping the pump on the required schedule during the three week test period. We do not believe there is adequate room to install a temporary security fence enclosure to house the trailer-mounted generator, so we would place a tire lock on the trailer, as well as secure the trailer with a chain to a tree. CDM will provide 10 gallons of diesel for initial startup of the pump and the City will then be responsible for purchasing and providing fuel and oils to operate the generator. The City will be responsible for maintaining proper fuel and oil levels as required by the generator manufacturer. The City also will fill the generator tank to the startup level prior to return of the generator, if required by the rental company. Damage to the generator or submersible pump that occurs as the result of improper operation or maintenance by the City will be the responsibility of the City to repair. Total generator run-time for the test period is not to exceed 260 hours, which will be adequate to operate the pump 12 hours per day for 21 days. If the generator is to be operated for more than 260 hours, additional hourly rental charges will be assessed. Upon completion of the three week pump station test, CDM will demobilize the site which will Include removal of the submersible pump, generator, and temporary fencing and removal and proper disposal of the sandbag barrier walls at both box culverts. Demobilization does not include installation of safety grating at the box culverts. Prior to test pumping, CDM will work with the City staff to develop guidelines for pump operation during daytime hours considering high tide conditions at the gravity discharge from the Lagoon Outfall. At the conclusion of the test pump period, evaluate the results of the test. Prepare a brief letter describing the pump test, the test results, and the evaluation.