Environmental Engineering Reference
In-Depth Information
The total of Ca plus Mg in me/l must equal the total hardness in me/l,
which is not the case here (the total of Ca and MG is 3.22 me/l, whereas
the total hardness is only 1.86 me/l, which is impossible).
An iron value of 8.0 mg/l would be extremely high if not impossible for a
natural surface water, hence this value appears to be wrong. Maybe it
was misrecorded and should be 0.8 or 0.08 mg/l. Also, surface water
with this much iron would likely be highly colored (hence the color
could not be 0.1 units as reported).
Manganese levels in natural waters are very low, rarely over 1 mg/l and
usually much less. Values as high as 7.5 mg/l do not occur in natural
waters (if they did, the water would be very red and the color (Item 21)
would not be 0.1 units are recorded.)
Boron values over 2 mg/l are extremely rare.
If the turbidity is 15 ppm, then the suspended solids should be of the same
magnitude, not three times as much.
The TDS of 523 mg/l is much too high, i.e., is not consistent with the
reported values for major anions and cations (which indicate a TDS of
about half as much).
It the TDS is 523 mg/l, the electrical conductivity would be in the range of
600, not 106.
Exhibit C
Revised Tabulation
me/1
1
/
Constituent
Unit
Value
pH and Alkalinity (1, 2)
(1)
pH
-
7.35
-
(2)
Total alkalinity (as CaCO
3
)
mg/l
52.
1.04
(a) Carbonate alkalinity (as CaCO
3
)
”
2.0
-
(b) Bicarbonate alkalinity (as CaCO
3
)
”
50.1
1.00
Major Anions (3 to 7)
(3)
Bicarbonate (HCO
3
)
”
82.
1.34
(4)
Sulfate (SOV)
”
32.
0.67
(5)
Chloride (Cl)
”
35.
0.99
(6)
Nitrate (NO
3
)
”
17.
0.54
(7)
Total major anions
-
-
3.54
Major Cations (8 to 12)
(8)
Sodium (Na)
”
15.3
0.67
(9)
Potassium (K)
”
8.1
0.21
(10)
Calcium (Ca)
”
30.2
1.51
(11)
Magnesium
”
20.5
1.71
(12)
Total major cations
-
-
4.10
