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October 31, 2016 Report
October 31, 2016 Report
Remediation Update #2
This post focuses on planned activities on and around the gypstack.
Earthwork and Construction
A safe zone was defined around the New Wales sinkhole to specify a safety perimeter for personnel and equipment. The perimeter allows Mosaic to work near the sinkhole safely and without compromising ground stability. To read more about how the safe zone was defined using LiDAR and other technologies, click here.
Among other things, we are preparing the gypstack surface for drilling and grouting operations. We are constructing a stable work pad atop the gypstack to support heavy machinery, such as drilling rigs and cement trucks. The work pad base will be made up of stockpiled gypsum and compacted to create a work area for foot and equipment traffic. Much like the foundation of a house, the work pad must be flat, strong and support the weight and movement on top of it.
Stabilization and Boring Installation
Mosaic will then stabilize the portion of the sinkhole just above the confining layer. Following the completion of these and all other needed preparations, Mosaic will drill from the safe zone to the base of the sinkhole. Initially these borings will be used to further evaluate the extent of the sinkhole and that information will be used to plan the detailed steps to seal the hole.
These borings will then be used to inject a concrete-like substance called grout into the cavity at high pressure. Application of the grout will seal the sinkhole base.
Mosaic will advance its efforts as quickly as possible, subject to FDEP’s continuing oversight. These and other activities are addressed in the consent order Mosaic entered into with FDEP on October 24, 2016.
Mosaic will share more plan details in the coming days, including an estimated timeline.
Daily Well Testing Update
As of today, Mosaic has received 1,223 well water test requests. Environmental Consulting & Technology, Inc. (ECT) is prioritizing testing based on neighbor’s proximity to the New Wales facility. Neighbors who have requested an alternative means of testing are encouraged to receive a water test at no cost from the Florida Department of Environmental Protection (FDEP).
Testing and Bottled Water Requests as of October 31, 2016
As of 12:00 pm
|Scheduled 3rd party well tests||1,223|
|Site visits/samples taken||1,123|
|Expected site visits today*||21|
|Requests for bottled water||1,019|
*Plans could change based on residents’ availability or inclement weather.