HYDRO25726

• Permit No: M1999002
• IBM Index Class Name: Hydrology
• Doc Date: 7/30/2007
• Doc Name: Quarterly Report
• From: American Soda, LLP
• To: DRMS
• Media Type: D
• Archive: No

AMERICAN
SODA,LLP
2717 County Road 215
Parachute, CO 81635
Thursday, July 26, 2007
Ms. Erica Crosby
Colorado Division of Reclamation, Mining and Safety
1313 Sherman Street, Room 215
Denver, CO 80203
Dear Ms. Crosby:
~yd.
Todd Wilson
Plant Manager
International Telephone [phone]
Toll Free Customer Service (866) 4 BICARB
General Facsimile [phone]
ENV041.07
RE~~CEPVED
~fJUL 3 0 2007
1 D Division of Reclamation,
Mining and SafetyMining and Safety
v
Enclosed are two copies of American Sod 's 27th Quarterl Re ort in compliance with
Hard Rock Mining Operation Permit No.~99- 02. One copy of the document is not
bound. These documents include environmental ground water monitoring data collected
and compiled during ourtwenty-seventh quarter of operations (June 2007). No solution
mining activity occurred during the report period.
The ground water data summary report is spiral bound as anon-confidential document and
includes a comparison of the 27th operational quarter with baseline and operational
general statistics prior to the current reporting period. In addition, the tables provide
information for comparison of Ground Water Standards as provided in Regulation No. 41
and Numeric Protective Levels and Early Warning Indicators as amended in TR-4.
Analysis of the data collected in June 2007 shows one data point for dissolved sodium
elevated above the early warning indicator (EWI) at the 21-5 alluvial monitoring well. The
sample collected indicates a value for dissolved sodium of 505 mg/L. The calculated EWI
for this constituent at this sampling point is 498 mg/L. The baseline mean value for
dissolved sodium is 443 mg/L computed from 15 samples and the operational mean
derived from 60 samples is 468 mg/L. The maximum value observed in the baseline
monitoring phase prior to solution mining was 456 mg/L. No other constituents flagged
above the EW I at this well or any other sampling point during the quarter. Observations of
dissolved sodium at well 21-5 will continue on a quarterly frequency. A graph representing
data for dissolved boron at well 21-3U for the period of record is provided on page 2 of the
Executive Summary.
Should you have any questions or comments regarding this information, please contact me
at [phone] or Celina Akin at [phone].
Delivering a Crystal Clear Advantage
www.americansoda.com