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This spreadsheet was designed for use with the RISC Technical Guide Appendix 3 stability monitoring guidelines. The spreadsheet executes the Mann-Kendall trend test** and displays results for one chemical at up to five wells. As stated in the RISC policy, the test should be executed on quarters 0 thru 8, 5 thru 12, 9 thru 16, 0 thru 12, and 0 thru 16. The 7 year evaluation is also executed on the 7 Year tab. The spreadsheet performs these tests and shows results on separate tabs.
The user should use the most accurate values possible in order to minimize duplicates.
* FROM: U.S. EPA Practical Methods for Data Analysis, U.S. EPA QA/G-9 QA00 UPDATE, July 2000, Section 4.3.4.
IDEM recommends that you download the tool and run it from your computer. It may not work properly from an internet browser.
Note that the user is responsible for all results on this sheet. IDEM is not responsible for any errors as a result of using this sheet.
If you have questions regarding risk-based closure, please see the Contact about Risk webpage