- EXHIBIT SEVEN
ESTABLISHMENT OF BACKGROUND VALUES FOR
PERCHLORATE, 1,4-DIOXANE AND MECOPROP
CLOSED COLLINSVILLE LANDFILL
COLLINSVILLE, ILLINOIS
EXHIBIT 7-1
Groundwater Results, Background Statistical Calculations and Background Values
(Section 5.0), Assessment of Detection, Sources, Extent and Applicability of Background
Values (Section 6.0), Summary of Conclusions (Section 7.0), References (Section 8.0) and
Tables 7-1.1 and 7-1.2 Submitted to IEPA October 24, 2014
NOTE: This copy excludes background information Sections 1-4), figures and comparison of all
data to Class I, background, and PQL criteria as well as Appendix B, Chain of Custodies and
Analytical Results and Appendix C, Statisti...