JUL-01 JUL-02 JUL-03 JUL-04 JUL-05 JUL-06 JUL-07
ELS Zone (1)              
Total Hardness (mg/L as CaCO3) (2) 175 171 174 172 174 175 --
pH (pH) (3) 8.0 8.0 7.8 7.6 7.6 7.6 7.7
Temperature (°C) -- -- -- -- -- -- --
Total Chlorine Residual (mg/L) (4) 1.99 1.99 1.98 1.99 2.00 2.01 2.01
Alkalinity (mg/L as CaCO3) (5) 115 117 116 115 115 117 121
Conductivity (µS/cm) (6) 413 411 409 407 401 395 390
Caustic Soda (mg/L) (7) 13.1 12.0 11.0 9.53 8.42 6.80 5.67