2019-12-05_HYDROLOGY - M1999058 (4)

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e M T Y a9 // �1 w ram•-"" „ %%!��%/ J ,. /�r r � ,.z Figure 22. Water sampling the sump at post pumping levels of around 3 feet; notice the cracked ice at the height of the sump at its previous 6 foot level. Photo captured November 1, 2019; view to the west-southwest. Following confirmation with HRL regarding future water sampling of the sump, on Friday, November 1st, the sump was partially filled with marble blocks and soil to facilitate the transport of the excavator used to buildup and fortify the sump berm (Figure 23). Prior to filling with marble blocks and loose soils, the ice, debris and soil along the eastern edge of the sump was removed and stockpiled above the sump area for removal once soil import was approved. Fresh soil was placed in the sump and will be segregated for removal during installation of HRL's long-term water sampling and remediation plan for the sump. The final HRL designed long-term sampling plan will be provided once it is completed by HRL and confirmed by CSQ and GLA. Rough estimates of long-term sampling includes bi-monthly (2x) sampling of the to-be-installed monitoring wells, sump and surface waters through spring and summer 2020 during peak runoff. Sampling will occur across all areas on a monthly basis during the winter months as dictated by safe access. Two totes of Micro-Blaze were delivered to the site. Implementation of Micro- Blaze treatment will be conducted by HRL. HRL committed to completing an application plan, facilitating the application, and monitoring the immediate and long-term results of the Micro-Blaze application. The installation of bioremediation ports and the initial surface sprayed application of Micro-Blaze occurred on Thursday, November 141h and Friday, November 15th. The HRL Bioremediation Treatment Plan is included in Appendix F. 31