PALMDALE WATER DISTRICT FLUSHING PROGRAM
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1 AGENDA ITEM NO. 5.1 PALMDALE WATER DISTRICT FLUSHING PROGRAM AMANDA THOMPSON WATER QUALITY SUPERVISOR PALMDALE WATER DISTRICT PALMDALE, CA 93550
2 PWD DISTRIBUTION SYSTEM OVER 414 MILES OF PIPELINE 7 DIFFERENT PRESSURE ZONES 18 STORAGE TANK LOCATIONS CAPACITY ~ 50 MILLION GALLONS
3 WHY DOES FLUSHING WORK? WATER AGE IS A MAJOR FACTOR IN WATER QUALITY DETERIORATION WITHIN THE DISTRIBUTION SYSTEM. TWO MAIN MECHANISMS FOR WATER QUALITY DETERIORATION: INTERACTIONS BETWEEN THE PIPE WALL AND THE WATER REACTIONS WITHIN THE BULK WATER ITSELF
4 FLUSHING REQUIREMENTS FLUSH PROBLEMATIC AREAS DESIGNATED LOCATIONS FLUSHING VELOCITY SHOULD BE BETWEEN FT/S
5 FLUSHING OPERATION
6 FLUSHING PROGRAM GOALS (IMPROVE WATER QUALITY & PROTECT PIPE INTEGRITY) TURBIDITY = THE CLOUDINESS OR HAZINESS OF A FLUID CAUSED BY LARGE NUMBERS OF INDIVIDUAL PARTICLES THAT ARE GENERALLY INVISIBLE TO THE NAKED EYE, SIMILAR TO SMOKE IN AIR.
7 FLUSHING PROGRAM GOALS (IMPROVE WATER QUALITY & PROTECT PIPE INTEGRITY) CHLORINE RESIDUAL = A LOW LEVEL OF CHLORINE REMAINING IN WATER AFTER ITS INITIALAPPLICATION.
8 WATER QUALITY CHLORINE RESIDUAL
9 WATER QUALITY CHLORINE RESIDUAL FLUSHING BRINGS FRESHER WATER INTO THE AREA & THEREFORE: INCREASES CHLORINE RESIDUAL REDUCES DEMAND REDUCES WATER AGE
10 FLUSHING PROGRAM GOALS (IMPROVE WATER QUALITY & PROTECT PIPE INTEGRITY) POOR TASTE AND ODOR AGED, STALE WATER PROVIDES AN ENVIRONMENT CONDUCIVE TO THE GROWTH AND FORMATION OF TASTE AND ODOR CAUSING MICROORGANISMS AND SUBSTANCES. FLUSHING BRINGS FRESHER WATER WITH HIGHER CHLORINE INTO THE AREA, THEREFORE REDUCING TASTE & ODOR CAUSING COMPOUNDS
11 FLUSHING PROGRAM GOALS (IMPROVE WATER QUALITY & PROTECT PIPE INTEGRITY) TRIHALOMETHANES (TTHMS) - DISINFECTION BY-PRODUCTS THAT RESULT FROM CHLORINE AND BROMIDE REACTING WITH ORGANIC CARBON IN WATER
12 WATER QUALITY TTHMS FLUSHING REDUCES WATER AGE, AND THUS THE TIME FOR CHLORINE TO REACT WITH ORGANICS, AND FORM DISINFECTION BYPRODUCTS
13 FLUSHING PROGRAM GOALS (IMPROVE WATER QUALITY & PROTECT PIPE INTEGRITY)
14 CORROSION CONTROL FLUSHING REDUCES THE TIME WATER IS IN CONTACT WITH THE PIPE, THUS REDUCING CORROSION
15 FLUSHING PROGRAM GOALS (MONITOR THE VOLUME OF WATER UTILIZED FOR FLUSHING) METERING USAGE
16 DROUGHT CHALLENGES
17 FLUSHING PROGRAM GOALS (STANDARDIZE THE FLUSHING PROGRAM) BE IN THE KNOW WHERE TO GO WHAT TO DO WHY WE DO IT
18 UTILIZING IPAD S SAVE EXACT GPS LOCATION INTO GIS MAKE NOTES AND TAKE PICTURES FOR REFERENCE LOG WATER QUALITY DATA AT THE SITE
19 FLUSHING PROGRAM GOALS (COLLABORATION TO ESTABLISH COMPETENT SOLUTIONS) SOLUTIONS FACILITIES ENGINEERING OPERATIONS
20 ACHIEVEMENTS EVALUATION OF WATER QUALITY REDUCED FLUSHING AT 4 WEEKLY SITES TO BI-MONTHLY REDUCED FLUSHING AT 2 BI-MONTHLY SITES TO YEARLY SCHEDULE EVALUATION OF DISTRIBUTION SYSTEM ELIMINATED 90 SITES REDUCED WATER USAGE FROM 7.1 MG (2013) TO 6.3 MG (2014)
21 ACHIEVEMENTS UTILIZING GEOGRAPHIC INFORMATION SYSTEMS (GIS) TO IDENTIFY AND MONITOR FLUSHING LOCATIONS
22 ACKNOWLEDGEMENTS
23 ANY QUESTIONS?
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