HYDRO24002

• Permit No: C1981019
• IBM Index Class Name: Hydrology
• Doc Date: 1/30/1996
• Doc Name: TELECOPY COVER
• From: COLOWYO COAL CO
• To: ERICA CROSBY
• Permit Index Doc Type: OTHER GROUND WATER
• Media Type: D
• Archive: No

SRN 30 '96 01~17PM COLOWYO CORL
TABLE 4
J
T1]9 Water f]uality Standards
~ckaround TDS Value fmo/11 ~eximum Allowable TD8 Coneentratlana
0 - 500 400 mg/I or 1.25 times the background
' level, whichever is least restrtctrYe
501 - 10,000 1.25 times the background value
10,001 or greater ~ No Ilmlt
P.9i13
a K Means lase than. When the Membrane Filter Technique Is used for analysis, the
average of all samples taken wrThtn a year must be less than 1 organism per 100
mllltter9 of sample. When the Filter Tube Method is used for analysis, the Ilmlt Is less
then 2,2 org/t00 ml.
1
1 b It the tdeMtty arad c~ncentratlon of each radionudide In a mixture are known, the
Ilmtting value would be derived ea follows: Determine, for each redlpnudide in the
mixture, the ratio between the quantity presertt in the mixture and the Ilmtt specified,
The sum of such ratios for all radlonudides In the mixture shall not exceed °1" (I.e-
unlty). A redionudkle may be wnskfered as not presem In a mbtture tt the ratio of
I the concentration to the Ilmtt does not exceed 1/10 and the sum of such ratios for all
radionuclides eonsldered as not present In the mbnure does not exceed 1/a.
c ND Means none detected using an approved analytical method wtth the lowest
detection Ilmtt for th1 parameter,
I
~d Measured as dlesdved concerrvetlon. The sample water shell be filtered through a
0:45 micron membrane filter pdor 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 actNtt}r,
e If two or more radlonudides ere present, the sum Of their annual dose equivalent to
the total body or to any organ shall not exts3ed 4 mrem per year. Except for Tritium
8nd Strontium 90 the concentration of man-made redfonuCl'xfes eauslnp 4 mrem total
hotly o- organ dose equivalents shell be calculated on the basis of a 2 Ilter per day
•drinking water intake using the 188-hour data listed in "Maximum Permissible Body
Burden and Maximum Permissible Concentration of Radionuclides in Air or Water for
Occupational Exposure,' NBS Handbook 89, es amended, August 19tH, US
Depertmam Of Commerce. I
These more stringent IevHS are necessary to protect livestock wetertng. Levels for
parameters wtthout this footnote are set t0 protect Inlgated 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.
g Thla level Is set to protect the fdlowing plama In ascending order of senshNtty:
Pecan, Black Walnut, Persian (English) W81nut, Jerusalem Artichoke. Navy Bean,
24