PERMFILE56645

• Permit No: M1999002
• IBM Index Class Name: Permit File
• Doc Date: 4/7/1999
• Doc Name: ADDENDUM 1 TO THE AMERICAN SODA LLP DRAFT GROUNDWATER AND SURFACE WATER MONITORING PLAN
• From: AMERICAN SODA
• To: DMG
• Media Type: D
• Archive: No

APR-08-1999 10:40 AGtaPITO RSSOCIATES 970 245 9234 P.02
Draft: April 7, 1999 Page i
American Soda, L.L.P.
Yankee Gulch Sodium Minerals Project
ADDENDUM NO.1 TO THE
"GROUNDWATER AND SURFACE WATER MONITORING PLAN"
Table of Contents
Paee
6.0 QUALITY ASSURANCE/QUALITY CONTROL .......................... ... 1
6.1 Crroundwater Sampling Methods ................................... ... 1
6.2 Calibration Proceduresand Frequency .............................. ...1
6.3 Data Reduction, Validation, and Reporting ............................ ... 2
6.3.1 Data Reduction ............................. . . . ........... ... 2
6.3.2 Data Validation .............. . . . ......................... ... 2
6.4 Data Management ........ . . .................................:. ... 2
6.5 Internal Quality Control Checks ............................. . ..... ... 3
6.5.1 Quality Control Checks-Field Activities ................... . .. ... 3
6.5.2 Quality Control Checks-Laboratory ........................,. ... 3
6.6 External Quality Carurol Checks-Third party Data Validation .......... ... 4
6.7 Preventative Maintenance ....... . ................................ ... 4
6.8 Data Assessment Procedures ...................................... ...4
6.9 Corrective Action ....................... . . . ................ . .... ... 5
6.9.1 Watet Quality Data ....................................... ... 5
6.9.2 Change in hydrostatic Pressure at the Dissolution Surface ......... ... 5
6.9.3 Process Monitoring . . ..................................... ... 6
Agapito Associazes, Inc.