Original EA Amendment

Heritage Minerals MMM EA Compliance Review

Appendix C - Exceedance Graphs

0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB09 (Chromium) MB09 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 MB14 (Chromium) MB14 WQO 0 1 2 3 4 5 6 7 8 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB04-D (Cobalt) MB04-D WQO

0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB11 (Chromium) MB11 WQO

MB02 (Cobalt)

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

MB02

WQO

0 1 2 3 4 5 6 7 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB05-D (Cobalt) MB05-D WQO 0 0.5 1 1.5 2 2.5 3 3.5 4 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB07-D (Cobalt) 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 (Cobalt) MB09 WQO

MB05-S (Cobalt)

10 12 14 16 18 20

0 2 4 6 8

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

MB05-S

WQO

MB08-D (Cobalt)

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

MB08-D WQO

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