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              A                    B           C            D           E         F
 1
 2   CALCULATION OF LEAD SOLUBILITY
 3                    David A. Vaccari, Ph.D., P.E.
 4                    Dept. of Civil, Environmental, and Coastal Engg.
 5                    Stevens Institute of Technology
 6                    Hoboken, NJ 07030         January 1990
 7
 8              pH (units)         8.500
 9      Alk (mg CaCO3/L)           180.0
10            TDS (mg/L)             500
11
12                Pb (ug/L):      111.76
13
14    Acidity (mgCaCO3/L)          354.2
15                    (H+)      3.16E-09
16                   (OH-)      3.16E-06
17                 (CO3=)       3.28E-05
18                (HCO3-)       3.12E-03
19               [H2CO3*]       2.47E-05
20                    [CT]      3.57E-03
21
22          SPECIES               Fresh      Aged       Carbonate     Basic      Beta
23   [Pb++]                      1.85E-04   2.23E-09     3.73E-09    1.82E-09
24   [PbOH+]                     2.45E-03   2.95E-08     4.94E-08    2.41E-08    5.89E+06
25   [Pb(OH)2]                   1.36E-04   1.64E-09     2.74E-09    1.34E-09    1.17E+11
26   [Pb(OH)3-]                  3.31E-07   3.98E-12     6.66E-12    3.25E-12    7.94E+13
27   [Pb2OH+++]                  5.18E-06   7.49E-16     2.10E-15    5.01E-16    4.27E+07
28   [Pb3(OH)4++]                3.22E-02   5.59E-17     2.63E-16    3.06E-17    1.26E+32
29   [Pb4(OH)4++++]              1.45E-02   3.02E-22     2.38E-21    1.35E-22    1.23E+35
30   [Pb6(OH)8++++]             3.31E+01    1.00E-28     2.22E-27    3.00E-29    2.04E+68
31   [PbCO3]                     4.78E-02   5.75E-07     9.63E-07    4.70E-07    1.26E+07
32   [Pb(CO3)2--]                4.26E-03   5.12E-08     8.57E-08    4.19E-08    2.14E+10
33   log[Pb total]                   2.30       -6.18        -5.96       -6.27
34   Pb (mg/l)                  41206993        0.137        0.229       0.112
35   I min calc'd              265.08028     0.00181      0.00181     0.00181
36   (Pb++)                      1.17E-04   1.41E-09     2.37E-09    1.16E-09
37
38                Gamma 0           1.014    Alpha 0       0.0069
39                Gamma 1           0.893    Alpha 1       0.9786
40                Gamma 2           0.635    Alpha 2       0.0145
41                Gamma 3           0.359                       1
42                Gamma 4           0.162
43                       I       0.01250
44                  Davies         -0.049
45
46   Based on Schock, JAWWA, 75(2), 1987




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