2019-12-05_HYDROLOGY - M1999058 (4)

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captured and retained in the sump by the numerous booms in the sump and the nature of the earthen surface of the berm. Following this determination, the pump was run for a few minutes on a 30-minute interval to ensure the pump and hoses did not freeze throughout the night. Approximately 10,000 gallons of tank space were kept open for this activity. Also, on Tuesday, the liner for full secondary containment of the primary generators, associated fuel tanks, and all included transfer points was ordered. The liner company, Raven CLI Construction, Inc., confirmed that the liner would be prepared and available for install the week of November 18, 2019. The liner was installed by Raven CLI Construction, Inc. on November 20 and 21, 2019, and is detailed in later sections of this report. CSQ only provided heavy equipment necessary to move and arrange the marble blocks used to anchor and support the liner. At the time this report was written, the generators were being reassembled by Rapid Energy, Wagner (Caterpillar), and Eaton exclusively. CSQ personnel did not participate in installation or assemblage activities associated with the liner and did not participate in placing the generators back online. Finally, HRL will to be utilized to review the liner installation as an additional third party knowledgeable in secondary containment implementation. On Wednesday, October 30t", GLA and CSQ representatives went to the quarry directly upon arrival at CSQ Marble. All CSQ personnel were reallocated to mitigation and pumping efforts to relieve the night shift crew. An immediate inspection was made by GLA to determine if diesel was discharged into Yule Creek. A strong diesel odor was present in the area along with a visible flow of water through the berm; however, visual cues did not exclusively indicate diesel had entered the creek (Figure 17). Agitated foam was observed on the surface of the two closest pools just north and downstream of the sump berm; however, the foam was likely the product of organics such as diesel and/or pine trees. The GLA representative first notified her offices of potential impact of diesel- laden waters into Yule Creek based on the strong diesel odor detectable north of the berm and also so advised HRL. While proper noticing occurred due to the concern for a potential impact to Yule Creek, all subsequent water sampling yielded results of non- detect in Yule Creek and thus verified that diesel impact to Yule Creek did not occur. 25