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_GENERAL DOCUMENTS - C1981017 (287)
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_GENERAL DOCUMENTS - C1981017 (287)
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Last modified
11/2/2020 11:50:20 AM
Creation date
6/25/2012 3:00:08 PM
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DRMS Permit Index
Permit No
C1981017
IBM Index Class Name
GENERAL DOCUMENTS
Doc Name
Bid Documents (IMP)
Media Type
D
Archive
No
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DRMS Re-OCR
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Signifies Re-OCR Process Performed
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' I I <br /> Page Two <br /> Mid Continent resources <br /> May 8, 1996. <br /> 3. Three ground-water samples will be collected from alongside Coal Creek to the northeast <br /> Of the maintenance shop. On Figure 1 it appears as though these three sampling paints <br /> are located to the north of Coal Creek, opposite the facility. All samples should be <br /> collected from Iocations along the south side of the creek. All existing seeps should be <br /> sampled, particularly if ground water emerges from separate and distinct areas. In the <br /> event that driven. or drilled wells are used to sample ground water, these sampling <br /> locations should be positioned such that they are located 'close to and downgradient of the <br /> maintenance shop (east to northeast). — <br /> 4- Every effort must be made to ensure that the single monitoring well GS-1 is truly located <br /> downgradient of the Sutey Pile. Although three monitoring wells are typically used to <br /> define the direction of ground-water flow and characterize water quality in the vicinity <br /> of an area of concern, a single well that is positioned correctly may be adequate for <br /> reconnaissance purposes. However, considering the large size of the Sutey Pile and the <br /> reasons for sampling ground water beneath it (possible releases from buried wastes in a <br /> limited area), the Division recommends that several ground-water samples' be collected <br /> from directly downgradient of the pile using driven wells. Unlike the single well <br /> approach proposed, the increased coverage and analytical data generated using multiple <br /> drive wells may be sufficient to conclusively demonstrate that the pile has no impact on <br /> ground-water quality. <br /> S. The plan proposes to collect'ground-water samples from only two areas at the Coal Basin <br /> property: downgradierit of the Sutey Pile and Maintenance Shop. Without knowing what <br /> activities occurred elsewhere on-site, it is currently not possible to say whether additional <br /> ground-water samples are needed downgradient of the other buildings, storage piles or <br /> ponds scattered across the site. A decision as to whether the sampling program should <br /> be expanded to other portions of the facility should be made following the historical <br /> review and field reconnaissance tasks. <br /> 6. All water samples will be analyzed for metals_ Since naturally occurring ground water <br /> may contain measurable metal concentrations,the Division recommends that ground-water <br /> samples be collected from locations upgradient of the area being investigated. The <br /> facilities influence on ground-water quality may then be determined by comparing the <br /> background data to the downgradient sample data. <br /> 7. A septic system is located outside the northeast corner of the Maintenance Shop_ This <br /> waste disposal unit should, also be sampled: either the contents of the septic tank or the <br /> soils immediately adjacent to and beneath the distribution lines. Past experience indicates <br /> that septic systems are used to dispose of materials other than sanitary wastes. Similar <br /> testing should perhaps be performed, at the septic systems which service the other <br /> buildings on-site, particularly if the site historical review and field reconnaissance tasks <br /> b0/£0-d ZT6## t7T:sT t,1-90`966T ess£ 998 £0£ -oas sBoanos9a 1UNrUUN1 W08=1 <br />
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