2014-04-29_HYDROLOGY - M2013070

• Permit No: M2013070
• IBM Index Class Name: HYDROLOGY
• Doc Date: 4/29/2014
• Doc Name: Quarterly groundwater monitoring
• From: Souder, Miller & Associates
• To: DRMS
• Email Name: THM
• Media Type: D
• Archive: No

MW -1
Table 1 -A
Ground Water Analytical Results
Liberty Mine Monitoring Well
Mesa County, Colorado
Total Well Depth (ft) 506
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CDPHE Water Quality
Basic Standards for
mg /I
5.0
0.1
0.1
0.75
0.01
0.1
0.05
0.2
5
0.1
2.5
0.2
0.01
0.2
0.02
0.1
2.0
Ground Water, Table -3
Sample Period
Date
I` Quarterly
1/18/13
NO WATER DRY
2ntlQuarterly
4/19/13
NO WATER DRY
3r° Quarterly
9/5 -6/13
mg /I
89.7
0.157
2.05
0.199
414
0.225
0.063
0.17
200
0.134
0.27
52.5
3.98
0.001
0.042
0.105
0.15
0.53
4` Quarterly
11/14/13
mg /I
47.4
70.03
0.65
0.662
70.01
0.209
159
0.89
0.024
0.068
66.6
0.051
0.23
28.7
1.37
0.0003
0.062
0.042
70.050
<0.03
<0.01
<0.05
0.082
0.24
5'" Quarterly
3/6/14
mg /I
1.78
<0.03
70.025
0.0569
<.01
0.26
7.01
21.7
7.01
<.005
<0.01
1.05
<0.05
0.22
0.0218
<0.0001
0.072
70.03
<0.05
70.03
70.01
70.05
70.01
70.03
Note: These sampling results are pre- minning and establish the water quality background for the mine.
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.
'These more stringent levels are necessary to protect livestock watering. Levels for parameters without this footnote are set to protect irrigated 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 folowing plants in ascending order of sensitivity: Pecan. Black Walnut, Persian (English) Walnut. Jerusalem Arluchoke, Nave Bean, American Elm, Plum, Pear. Apple, Grape (Sultanina and Malaga),
Kadota Fig, Persimmon. 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 /l.
" This level protect all crops, except citrus which do not grow in colorado and therefore a more stingent level of protection is not required.
This standard is only appropriate where irrigation water is applied to soils with pH values lower than 6.0.