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verified and approved by the Owner prior to installation, the IC shall provide and install valve box extension(s) as manufactured by Ametek. 3.07 THRUST BLOCK INSTALLATION A. All mainline pipe shall have thrust blocks installed at tees, bends, or at the end of pipe lines as detailed on the drawings. Care shall be taken to install the concrete on the fittings and away from joints of pipe. Control, power, and valve wires must be kept free of concrete and placed outside and away from the thrust blocks. Thrust blocks shall be poured against undisturbed ground as detailed on the drawings. No pre -cast or pre - "bagged" thrust blocks will be allowed. MYTIMIM A. Exterior alkyd - enamel, flat - black, shall be used on above - ground PVC risers and other designated irrigation equipment. The IC shall provide paint sample prior to execution of painting. 3.09 TESTING A. The IC shall notify the LA and Owner seventy -two (72) hours in advance of testing. B. Prior to backfilling of mainline fittings, the IC shall fill the mainline piping with water, in the presence of the Owner /OAR, taking care to purge the air from it by operating all the sprinkler - control valves one (1) or more times and /or such other means as may be necessary. A small, high - pressure pump or other means of maintaining a continuous water supply shall be connected to the mainline and set so as to maintain 125 psi in the mainline system for two (2) hours without interruption. When this has been accomplished, and while the pressure in the system is still 125 psi, leakage testing shall be performed in accordance with AWWA Standard C -600 (i.e., .08 of a gallon (x) diameter of pipe (x) per 1,000' of pipe ( =) allowable amount of water added). Pressure readings shall be noted and make -up water usage shall be recorded. Should the rate of make -up water usage indicate significant leakage, the source of such leakage shall be found and corrected and the system then re- tested until the Owner /OAR is satisfied that the system is reasonably sound. Lateral line testing shall be conducted during the operating testing of the system by checking visually the ground surface until no leaks in this portion of the system are evident. Leaks shall be repaired or paid for by the IC at anytime they appear during the warranty period. C. Adjustment and Coverage of System: Coordinate pressure testing with adjustments and coverage test of system so both may occur at the same 07/06 02810 -20 05 -5564