Original EA Amendment

Heritage Minerals MMM EA Compliance Review

Appendix C - Exceedance Graphs

MB14 (Copper)

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 (Lead) MB02 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 MB05-D (Lead) MB05-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 MB07-D (Lead) MB07-D WQO 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 0.0009 0.001 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB09 (Lead) MB09 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 MB14 (Lead) MB14 WQO

100 120 140 160 180 200

0 20 40 60 80

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

MB14

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 MB04-D (Lead) MB04-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 MB05-S (Lead) MB05-S WQO 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 0.0009 0.001 Jul-22 Oct-22 Jan-23 Apr-23 Jul-23 Oct-23 Jan-24 Apr-24 Jul-24 Oct-24 MB08-D (Lead) MB08-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 MB11 (Lead) MB11 WQO

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