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PERMFILE105519
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PERMFILE105519
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Entry Properties
Last modified
8/24/2016 9:58:27 PM
Creation date
11/24/2007 12:27:29 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982057A
IBM Index Class Name
Permit File
Doc Date
12/5/2005
Section_Exhibit Name
Tab 15 Hydrologic Monitoring Program
Media Type
D
Archive
Yes
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of NPDES Permit No. CO-0000221 (Appendix 15-41. Pond 006 was completed in October, 1989 <br />and it started discharging effluent in March, 1990. Pond 005 was completed in July of 1992 <br />and started discharging in April, 1993. Pond 009 was completed in October of 1991 and started <br />discharging in April, 1996. Pond 015 was constructed in August 1999 and began to discharge in <br />February 2000. Pond 016 was constructed in September 2000 and began to discharge in Aprll <br />2007. Pond 017 was completed in December 2002 and began discharging in the spring of <br />2003. Monitoring at NPDES sites will adhere to the requirements of NPDES Permit No, CO- <br />0000221. In addition, [ri-annual full-suite water samples will be collected at all NPDES sites. <br />Ground Water Monitoring <br />Ground Water Monitoring Site Numbering System, An example of the format used to identify <br />ground water sites is "GW-S2W-19A". The "GW" prefix indicates ground water; the "S2W" <br />refers to the Seneca II-W Mine; the number "19" refers to the site number; and the "A" refers to <br />the aquifer code, which in this case is the alluvium. Other aquifer codes include: "OV' _ <br />Wadge Overburden; "W" =Wadge coal; "WC" =Wolf Creek coal; and "I" =Wadge/Wolf Creek <br />interburden. The addition of an "E" prior to these aquifer codes at Well Site #3 denotes an <br />eastern set of water level observation wells. For the sake of brevity in the text, the GWS2W <br />prefix is usually omitted. Thus, for example, Site GW-S2W-79A is referred to as simply "Site <br />19A'. <br />Ground Water Monitoring Well Construction and Testing. Well construction summaries and <br />lithologic logs are found in Appendix 7-1. No well development activities were documented for <br />walls drilled in 1979 {Well Sites 1-91- Wells GW-S2W-10W to 13W were developed in August, <br />1982. Development procedures consisted of water injection followed by air surging. Air is <br />injected into the well forcing water, sediment, and contaminants out of the top of the casing. <br />The air supply is periodically shut off, allowing the aerated water column to fall back down the <br />well bore which effectively back surges the gravel Dack. Development information for wells <br />drilled in 1987 (Well Sites 14 through 191 may be found with their respective well construction <br />summaries (Tab 7, Appendix 7-11. In general, these development activities included a <br />combination of bailing, pumping, and air surging. <br />Aquifer tests were attempted on all wells drilled in 1987 (Wells GW-S2W-140V to 19A1. Tests <br />conducted at Wells 140V and 160V were unsuccessful. Accurate water level <br />measurements could not be obtained in 140V, and 160V was dry at the time the aquifer tests <br /> <br />Tn_G 7 11! <br />o-..:__~ nei <br />a3ro5 <br />
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