PERMFILE49970

• Permit No: M1999002
• IBM Index Class Name: Permit File
• Doc Date: 4/26/1999
• Doc Name: TR 2 TO APPLICATION GROUNDWATER & SURFACE WATER MONITORING PLAN
• From: AMERICAN SODA
• To: DMG
• Media Type: D
• Archive: No

April 22, ! 999 • • Page i
American Soda, L.L.P.
Yankee Gulch Sodium Minerals Project
GROUNDWATER AND SURFACE WATER MONITORING PLAN
FOR THE YANKEE GULCH SODIUM MINERALS PROJECT
Table of Contents
PBeC
1.0 INTRODUCTION ......................................................1
2.0 GROUNDWATER MONITORING LOCATIONS ............................ 2
2.1 Yankee Gulch Lease Site ............................................ 2
2.2 Monitoring Well Layout for the Yankee Gulch Lease Site .................. 2
2.2.1 Multiple-Completion Monitoring Wells .......................... 5
2.2.2 Existing Monitoring Wells .................................... 7
2.3 Parachute Site .....................................................7
2.4 Local Domestic Wells .............................................. 9
3.0 GROUNDWATER MONITORING ........................................ 9
3. l Water Level Monitoring ............................................. 9
3.2 Groundwater Quality Analytical Parameters ............................. 9
3.3 Groundwater Quality Sample Collection and Frequency .................. 12
3.4 Life-of--Mine Groundwater Monitoring Plan ........................... 13
3.5 Monitoring after Cessation of Commercial Operations .................... 13
4.0 SURFACE WATER MONITORING ..................................... 14
4.1 Piceance Creek Monitoring .........................................14
4.2 Parachute Creek Monitoring ........................................16
4.3 Spring and Seep Monitoring-Yankee Gulch Lease ...................... 17
4.4 Precipitation Monitoring ........................................... 17
4.5 Monitoring after Cessation of Commercial Operations .................... 17
5.0 PROCESSING MONITORING ........................................... 18
5.1 Solution Wells ................................................... 18
5.2 Solution and Cooling Ponds ........................................ 19
5.3 Pipeline Monitoring ...............................................19
6.0 QUALITY ASSURANCE/QUALITY CONTROL ........................... 20
6.1 Groundwater Sampling Methods ..................................... 20
6.2 Calibration Procedures and Frequency ................................ 21
6.3 Data Reduction, Validation, and Reporting ............................. 21
6.3.1 Data Reduction ............................................. 2]
Agapito Associates, Inc.