Water Quality Standards
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      2. Water Quality Standards

      Boiler Feedwater Limits

      Boiler feed water limits

      DRUM PRESSURE

      BELOW 600 PSI

      600 TO
      1,000 PSI

      1,000 TO
      2,000 PSI 

      OVER 2,000 PSI

      Total Solids, ppm

      		    

      0.15

      		  

      Total Hardness

      		 0 0 0 0

      Silica

       1.7 - 2.5

       0.4 - 0.8

       0.04 - 0.4

      0.01 - 0.04

      Iron, ppm

      0.1

      0.05

      0.01

      0.01

      Copper, ppm

      0.05

      0.03

      0.005

      0.002

      Oxygen, ppm

      0.007

      0.007

      0.007

      0.007

      pH

       8.0 - 9.5

      8.0 - 9.5

      8.5 - 9.5

      8.5 - 9.5

      Organic

      		 0 0 0 0