2012-11-14_HYDROLOGY - M2002004

• Permit No: M2002004
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/14/2012
• Doc Name: 3RD QTR GROUNDWATER MONITORING REPORT
• From: GCC RIO GRANDE
• To: DRMS
• Type & Sequence: AM1
• Email Name: TC1
• Media Type: D
• Archive: No

GCC
Rio Grande
Pueblo Plant
Via FedEx 794059530766
Mr. Tim Cazier
Division of Reclamation, Mining, and Safety
1313 Sherman Street
Room 215
Denver, CO 80203
Re: GCC Rio Grande, Inc. - DRMS Permit No. M- 2002 -004, Revision No. AM -1
Third Quarter 2012 Groundwater Monitoring Report
Dear Mr. Cazier:
RECEIVED
NOV 14 2012
Division of Redamatllon,
Mining & Safety
November 13, 2012
Enclosed are two copies of the Third Quarter 2012 Groundwater Monitoring Report (Report), as required
by your letter to GCC dated February 24, 2012. Pursuant to your letter, GCC is only required to monitor
for TDS on a quarterly basis. Therefore, only TDS was monitored in this quarter.
The groundwater sampling was conducted on September 26, 2012, and the report was transmitted to
GCC on November 1, 2012. .
The following monitoring wells were sampled:
• MW -002
• MW -004
Samples were not collected at MW -003, as this well was dry, as was the Arkansas River.
The table below presents the numeric protection levels (NPLs) established in the DRMS's December 8,
2010 letter and the concentrations measured in April and October 2011 and March, June and September
2012.
GCC Rio Grande, Inc. • Pueblo Plant
3372 Lime Road • Pueblo, CO 81004
(719) 647 -6800 • Fax [phone]
DRMS
NPL
MW -002
April
2011
October
2011
March
2012
June
2012
September
2012
Sulfate,
1950
862
930
1200
713
sampled
TDS, mg /I
2630
1590
1760
2150
1480
1,870
R -226, PiC /I
23.5
3.4
1.4
2.6
2
Not
sampled
R -228, PiC /I
12.3
3.9
2.5
2.1
1.1
Not
sampled
GCC
Rio Grande
Pueblo Plant
Via FedEx 794059530766
Mr. Tim Cazier
Division of Reclamation, Mining, and Safety
1313 Sherman Street
Room 215
Denver, CO 80203
Re: GCC Rio Grande, Inc. - DRMS Permit No. M- 2002 -004, Revision No. AM -1
Third Quarter 2012 Groundwater Monitoring Report
Dear Mr. Cazier:
RECEIVED
NOV 14 2012
Division of Redamatllon,
Mining & Safety
November 13, 2012
Enclosed are two copies of the Third Quarter 2012 Groundwater Monitoring Report (Report), as required
by your letter to GCC dated February 24, 2012. Pursuant to your letter, GCC is only required to monitor
for TDS on a quarterly basis. Therefore, only TDS was monitored in this quarter.
The groundwater sampling was conducted on September 26, 2012, and the report was transmitted to
GCC on November 1, 2012. .
The following monitoring wells were sampled:
• MW -002
• MW -004
Samples were not collected at MW -003, as this well was dry, as was the Arkansas River.
The table below presents the numeric protection levels (NPLs) established in the DRMS's December 8,
2010 letter and the concentrations measured in April and October 2011 and March, June and September
2012.
GCC Rio Grande, Inc. • Pueblo Plant
3372 Lime Road • Pueblo, CO 81004
(719) 647 -6800 • Fax [phone]