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S = STANDARD DEVIATION OF THE NUMBER <br /> OF OBSERVATIONS , MEASUREMENTS OR <br /> CALCULATED WATER APPLICATIONS AT <br /> POINTS BENEATH THE IRRIGATION <br /> SYSTEM , AND <br /> X = AVERAGE DEPTH OR VOLUME OF WATER <br /> MEASURED AT ALL OBSERVATION <br /> POINTS , <br /> SPRINKLER/EMITTER COVERAGE TESTING <br /> A . ALL SPRINKLERS MUST BE ADJUSTED TO MINIMIZE OVER- <br /> SPRAY ONTO BUILDINGS AND PAVED AREAS . <br /> B . ALL SPRINKLER CONTROLS MUST BE ADJUSTED TO MINIMIZE <br /> RUNOFF OF IRRIGATION WATER . <br /> C . ALL SPRINKLERS MUST OPERATE AT THEIR DESIGN RADIUS OF <br /> THROW . <br /> D . SPRAY PATTERNS MUST OVERLAP AS DESIGNED , <br /> E . VERIFY THAT THE SPRINKLERS ARE CONNECTED TO THE <br /> APPROPRIATE ZONE , <br /> F . VERIFY THAT NOZZLE OR EMITTER SIZES AND TYPES CALLED <br /> FOR IN THE SYSTEM DESIGN HAVE BEEN USED . <br /> PRESSURE DISTRIBUTION TESTING <br /> A . PRESSURE HEAD LOSS TESTS : THE DESIGN OPERATING <br /> PRESSURE OF THE SYSTEM SHALL BE STATED ON THE PLAN , <br /> THE PRESSURE AT ANY POINT IN THE SYSTEM SHALL NOT BE <br /> MORE THAN PLUS OR MINUS 10 % OF THE DESIGN OPERATING <br /> PRESSURE AT THAT POINT , <br /> B . TESTING WILL BE PERFORMED AS FOLLOWS : <br /> 1 . ZONES TO BE TESTED WILL INCLUDE , AT MINIMUM , THE <br /> LARGEST ZONE , SMALLEST ZONE , THE ZONE CLOSEST TO <br /> THE SOURCE IN TERMS OF MAINLINE DISTANCE , AND THE <br /> ZONE FARTHEST FROM THE SOURCE IN TERMS OF <br /> MAINLINE DISTANCE . <br /> 2 , TESTING OF EACH ZONE WILL BE DONE BY MEASURING <br /> PRESSURE AT A MINIMUM OF 2 POINTS , ONE PRESSURE <br /> WILL BE MEASURED AT THE SPRINKLER CLOSEST TO THE <br /> ZONE CONTROL VALVE AND THE SECOND WILL BE <br /> MEASURED AT THE SPRINKLER FARTHEST FROM THE ZONE <br /> CONTROL VALVE , <br /> BACKFLOW PREVENTION ASSEMBLY TESTING <br /> A. A CERTIFIED TECHNICIAN WILL TEST ALL ASSEMBLIES THAT <br /> CAN BE TESTED PRIOR TO BEING PLACED INTO SERVICE , <br /> F:\Engineering\Special Projects\Eagle Trace Phase 2\Contract Documents\Eagle Trace Subdivision Phase <br /> II\IRRIGATION SPECIFICATIONS from W. F. McCain .doc . 15 - <br />