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2007-11-20_REVISION - M1982015 (12)
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2007-11-20_REVISION - M1982015 (12)
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Last modified
6/16/2021 6:12:41 PM
Creation date
3/18/2009 4:22:08 PM
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Template:
DRMS Permit Index
Permit No
M1982015
IBM Index Class Name
REVISION
Doc Date
11/20/2007
Doc Name
Integrated Corrective Action Plan
From
E-21 Engineering, Inc.
To
DRMS
Type & Sequence
TR3
Media Type
D
Archive
No
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the slurry wall construction, the groundwater monitoring wells will need to be <br />abandoned. The wells will either be filled with clean silica sand to the top of the <br />screen interval followed by hydrated bentonite, or the PVC well casings will be <br />removed by pulling then from the ground. Immediately upon completion of the <br />slurry wall, new groundwater monitoring wells will be installed to determine the <br />extent of residual gasoline impacts on both sides of the slurry wall. It is expected <br />that dissolved phase BTEX will be present in groundwater. Based on the level <br />and extent of residual gasoline impacts, a groundwater remediation system will <br />be designed for expedited installation. The goal of the remediation system will <br />be to eliminate the exposure pathways by dissolved phase groundwater to the <br />surrounding surface water bodies. When dissolved phase BTEX concentrations <br />have been remediated to below the Basic Colorado Groundwater Standards, the <br />remediation system will be shut off for monitoring. If groundwater is shown to be <br />successfully remediated for a period of four quarters after system shut-off, the <br />system will be removed and a petition for no further action will be submitted. <br />20
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