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• Wells GCZ, Coy and GP1 through GP9 and GMP-1 were added to the list of groundwater monitoring sites
<br />during permit term 1988-1992. Most quarterly sampling requirements for far eastern wells were dropped
<br />in 1990 as mining should not affect the groundwater systems on the eastern side. Additional parameter
<br />sampling is conducted on asemi-annual and annual basis.
<br />In 1988, Trapper began a yearly spring survey program. The survey covers those areas in and adjacent
<br />to mined areas where springs could establish due to recharge through recontoured spoils. The program
<br />inventories and samples those springs exhibiting a five gallons per minute or greater flow. If weather
<br />allows, the survey will be completed by May 15th of each year. List A-3 of Table 4.8-12 shows the
<br />parameters to be evaluated. Since 1989, the results of the inventory and samples obtained from spoil
<br />related springs have been included in the annual hydrologic report (Appendix W). Permit revision 3 (1993-
<br />1997) changed the sample parameter list from a ground water monitoring list to a surface parameter
<br />sampling list
<br />In accordance with TR-44 "1988 Annual Report" approval, the following wells no longer require quarterly
<br />TDS analysis but still require annual TDS analysis; GA1, GA-2, GB-5, GC-1, G0.1, GD-2, GE-1, GE-2,
<br />GF-1, GF-2, GF-3, GF~t, GF-5, GP-1, GP-2, GP-3, GPI, GP-5, GP-0, GP-7 and GP-8.
<br />In accordance with TR-48 "1989 Annual Report" approval, the following groundwater sampling changes
<br />became effective:
<br />1) Vanadium was dropped as a sample parameter in the BBD lists; 2) Total concentrations for Arsenic,
<br />Barium, Cadmium, Chromium, Copper and Selenium were dropped from the B and E parameter lists, and
<br />Barium and Chromium total concentrations were dropped from the D parameter list, and replaced by
<br />dissolved sampling requirements; 3) Ash wells GD-2, GD-3, GF-0 and GF-11 will be sampled by the B&C
<br />lists (C list replaced D list) until ash disposal occurs in areas upgradient of these wells. At such time, the
<br />• D parameter list will be adopted for these wells, replacing the C-list.
<br />In accordance with TR-54 "1990 Annual Report" approval, the frequency of sampling for the following
<br />groundwater wells was modified to allow for semi-annual sampling (spring and fall): GA1, GA2, GB2,
<br />GBS, GD1, GD2, GD3, GE1, GE2, GF1, GF2, GF3, P5, 81-03A, GP3, GP4, GP5 and GPB. In the event
<br />ash disposal occurs upgradient of currently semi-annual monitored ash wells, quarterly monitoring will be
<br />required. The GD-1 (2) monitoring well was proposed for semi-annual (list C) and annual (list B) sampling
<br />and replaces the requirement for sampling GD-1.
<br />In October 1991, Trappers domestic water well, GD-1, began to experience substantial production
<br />problems. In January 1992, Trapper established a new domestic water well G0.1(2) (see MR-115) to
<br />supplement water produced from GD-1. During permit term 1998-2002, Trapper does not plan to
<br />establish any additional groundwater monitoring wells. Sampling of the established 38 wells will continue
<br />as described in Tables 4.8-13 and 4.8-13a. See Trappers Annual Reports (Appendix W, Volumes 17-26,
<br />Section 2) for complete hydrologic findings and analysis .
<br />Beginning in 1997, in accordance with Technical Revision TR-75, the frequency of sampling groundwater
<br />wells for water quality will be on asemi-annual basis (spring and fall). Sampling will be accomplished by
<br />pumping wells before water samples are taken. Monitoring of water level elevations for all groundwater
<br />wells will be on a quarterly basis. Groundwater sample data will be reported each year in the annual
<br />report. Table 4.8-13a lists the groundwater monitoring schedule for each well and Table 4.8-13 lists the
<br />parameters for each sample list.
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