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SECTION 02665 WATER SYSTEM 1. If the chlorine concentrations and residuals fail to meet these requirements in any of the tests performed, the contractor shall be required to initiate new disinfection procedures in accordance with AWWA Specification C601-68, Continuous Feed Method. 2. The Contractor shall calculate the necessary dosage per length of pipe to insure compliance with these requirements based on the type of tablets utilized. 3.07 HYDROSTATIC TEST A. Each section of completed pipeline between successive valves or other closure shall be thoroughly flushed at hydrants to remove all confined air or foreign matter before testing. Every section shall then be tested individually in the following manner. 1. Each section shall be subjected to a hydrostatic pressure of 150 po,,nds per square inch, measured by a gauge at the lowest hydrant, fo a period of one hundred twenty minutes. The Engineer will evaluate any drop in pressure to determine when the test has been successfully completed. A further test shall then be made as follows: 2. The quantity of water pumped ii to the pipe to maintain a constant pressure of eighty pounds at the lowest hydrant, for a period of not less than one-half hour shall be accurately mesasured. The permissible leakage in a 24 hour period under this test shall be not more than 50 gallons per inch diameter per mile of pipe. B. The above described tests shall be made under the Engineer's supervision and to his satisfaction. The Contractor shall discover all faulty pipe or other material and workmanship during the tests and shall replace the same at his own expense to the satisfaction of the Engineer. All leaks shall be made tight. The above tests to be repeated after any replacements have been made. All necessary pumps, appliances and labor for these tests shall be furnished and all connections shall be made by the contractor at his own expense. The Engineer shall be notified 24 hours before tests. 3.08 ELECTRIC CONTINUITY A. The system (pipeline and hydrants) shall be tested for electrical continuity and current capacity. The electrical test shall be made after the hydrostatic pressure and while the line is at normal operating pressure. Backfilling shall have been completed. The line may be tested in sections of convenient length as approved by the Engineer. 1. direct current of 350 amperes, t 10%, shall be passed through the pipe line for 5 minutes. Current flow through the pipe shall be measure continuously or a suitable ammeter and shall remain steady without interruption or excessive fluctuation throughout the 5 minute test period. N KKE1186