HYDRO30666

• Permit No: M1977208
• IBM Index Class Name: Hydrology
• Doc Date: 6/18/2004
• Doc Name: Groundwater Response Plan
• From: DMG
• To: CEMEX Inc.
• Media Type: D
• Archive: No

TABLE 4
TDS Water Quality Standards
Background TDS Value (mg/D Maximum Allowable TDS Concentrations
0 - 500 400 mg/I or 1.25 times the background
level, whichever is least restrictive
501 - 10,000 1.25 times the background value
10,001 or greater No limit
a K Means less than. When the Membrane Filter Technique is used for analysis, the
average of all samples taken within a year must be less than 1 organism per 100
milliters of sample. When the Multiple Tube Fermentation Method is used for analysis,
the limit is less than 2.2 org/100 ml.
if the identity and concentration of each radionucide in a mixture are known, the
limiting value would be derived as follows: Determine, for each radionuclide in the
mixture, the ratio between the quantity present in the mixture and the limit speciFled.
The sum of such ratios for all radionuclides in the mixture shall not exceed "1" (i.e.
unity). A radionuclide may be considered as not present in a mixture if the ratio of the
concentration to the limit does not exceed 1/10 and the sum of such ratios for all
radionuclides considered as not present in the miMure does not exceed 1/4.
ND Means none detected using an approved analytical method with the lowest
detection limit for the parameter.
Measured as dissolved concentration. The sample water shall be filtered through a
0.45 micron membrane filter prior to preservation. The total concentration (not filtered)
may be required on a case-by-case basis if deemed necessary to characterize the
pollution caused by the activity.
If two or more radionuclides are present, the sum of their annual dose equivalent to
the total body or to any organ shall not exceed 4 mrem per year. Except for Tritium
and Strontium 90 the concentration of man-made radionuclides causing 4 mrem total
body or organ dose equivalents shall be calculated on the basis of a 2 liter per day
drinking water intake using the 168-hour data listed in "Maximum Permissible Body
Burden and Maximum Permissible Concentration of Radionuclides in Air or Wafer for
Occupational Exposure," NBS Handbook 69, as amended, August 1963, US
Department of Commerce.
These more stringent levels are necessary to protect livestock watering. Levels for
parameters without this footnote are set to protect irtigated crops at the same level.
Where a party can demonstrate that a livestock watering use of ground water is not
reasonably expected, the applicable standard for lead is 5.0 mg/I.
This level is set to protect the following plants in ascending order of sensitivity: Pecan,
Black Walnut, Persian (English) Walnut, Jerusalem Artichoke, Navy Bean, American
Elm, Plum, Pear, Apple, Grape (Sultanina and Malaga), Kadota Fig, Persimmori,
Cherry, Peach, Apricot, Thornless Blackberry, Orange, Avocado, Grapefruit, Lemon.
Where a party can demonstrate that a crop watering use of ground water is not
reasonably expected, the applicable standard for boron Is 5.0 mg/I.
This level protects all crops, except citrus which do not grow in Colorado and therefore
a more stringent level of protection is not required.
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