REP37836

• Permit No: M1983194
• IBM Index Class Name: Report
• Doc Date: 12/31/1990
• Doc Name: THE 1990 PROJECT STATUS AND ANNUAL PLAN OF DEVELOPMENT
• Permit Index Doc Type: ANNUAL FEE / REPORT
• Media Type: D
• Archive: No

•
i •
TABLE 2-3
NATEC'8 HIBTORY OF RATER MONITORING PLAN
Nov. 1983 Bulk Sample (Phase I) solution mine operated.
Jan. 1984 Final Environmental Assessment for 3-ton per hour
pilot solution mine and approval of Mine Plan with
three cavities and a monitoring well was published.
Sept. 1985 Leasee updated Pilot Mine Plan with a monitoring
well completed at 1867-1887'.
Nov. 1985 Tentative BLM Stipulations received by Leasee for a
monitoring well with continuous water level
recorder and sampling major and trace constituents.
March 1986 Final Environmental Assessment for 6 ton per hour
pilot solution mine for up to three well pairs
(published Jan. 1986). Included a monitoring well
50' above the dissolution surface, equipped with
continuous graphic water-level recorder.
Monitoring well was to be sampled for major and
trace constituents twice initially and monthly
(long term) for major constituents.
June 1987 BLM notified leasee that monitoring of four
groundwater zones should be monitored 3 to 6 months
prior to and throughout operation of the pilot
project. The zones were
1. The Perched aquifer zone
2. The A-Groove of the upper aquifer
3. The B-Groove of the lower aquifer
4. Just above the dissolution surface at the
base of the lower aquifer
•
The BLM noted "that if the pilot project was the
only consideration, monitoring of the perched and
A-Groove zones would not be absolutely necessary,
based on projected impacts of only one well pair.
However, because the pilot project is an
experimental demonstration project to define and
prove the technical, economical and environmental
feasibility of leasee's proposed solution mining
and because leasee has proposed expansion of the
pilot to a 30-year project, the BLM feels that the
two projects cannot be viewed entirely separate".
29