Original EA Amendment

Heritage Minerals MMM EA Compliance Review

Appendix C - Exceedance Graphs

0 0.5 1 1.5 2 2.5 3 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB04-D (Nickel) MB04-D WQO

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB05-D (Nickel) MB05-D WQO 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB07-D (Nickel) MB07-D WQO 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB09 (Nickel) MB09 WQO 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB14 (Nickel) MB14 WQO 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB04-D (Selenium) MB04-D WQO

MB05-S (Nickel)

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24

MB05-S

WQO

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB08-D (Nickel) MB08-D WQO

MB11 (Nickel)

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24

MB11

WQO

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB02 (Selenium) MB02 WQO

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