DATABASE C:\Program Files\USGS\Phreeqc Interactive 2.6\phreeqc.dat
SOLUTION_SPREAD
    -units    mg/l
 Description	 Number	   pH	   pe	      Redox	 Temperature	 O(0)	   Ca	   Mg	   Na	    Fe	   Mn	    Al	    Sr	      Si	  Cl	    C	 Alkalinity	   S(6)
           	       	     	     	           	            	     	     	     	     	      	     	      	      	 as SiO2	    	 as C	    as HCO3	 as SO4
    well 402	      1	 4.13	 7.09	           	          18	     	  502	  161	  121	   591	 71.6	  18.4	  2.29	    85.6	 140	   50	           	   3260
    well 504	      2	 7.05	     	 O(0)/O(-2)	        20.5	 6.64	 44.6	 15.6	 19.8	 0.001	    0	 0.001	 0.335	      27	 9.7	     	        227	   14.2
    well 503	      3	 5.59	  6.9	           	        18.2	     	  634	  200	   86	 0.001	  116	   2.3	   2.7	    91.8	 112	     	         66	   2350
INVERSE_MODELING 1
    -solutions      1        2        3
    -uncertainty    0.05     0.05     0.05
    -phases
        Calcite             dis
        Anorthite           dis
        Albite              dis
        Dolomite            dis
        Gypsum
        Gibbsite
        Goethite
        Rhodochrosite
        Pyrolusite
        Chalcedony
        Tremolite
        Celestite
    -balances
        Cl          0.05     0.05     0.05
    -tolerance         1e-010
    -mineral_water     true
PHASES
Tremolite
    Ca2Mg5Si8O22(OH)2 + 14H+ + 8H2O = 2Ca+2 + 8H4SiO4 + 5Mg+2
    log_k     0
END