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Table 15-7 <br /> Ground Water Quality Sampling Procedures for Each <br /> Monitor Well at Nucla and Nucla East Mining Area, <br /> Montrose County, Colorado <br /> Well No. Sampling Procedure and Remarks <br /> Nucla Mine: <br /> GW-N1 Bail or pump 2 CV's, then sample <br /> N3 As above <br /> N4R Bail or pump until dry, let recover, then sample <br /> N9 Bail or pump 2 CV's, then sample <br /> N10 Dry. No samples taken to date <br /> N26 Dry. No samples taken to date <br /> N27 Bail 2 CV's or pump for 2 minutes at 6 gpm, then sample when <br /> conductivity has stabilized <br /> N28 Dry. No samples taken to date <br /> Nucla East Area: <br /> GW-N13 Bail 2 CV's then sample, or pump dry, let recover 10 minutes, <br /> then sample <br /> N14 Bail until dry, let recover, bail again, then sample; or pump <br /> until dry, let recover 10 minutes, pump dry a second time, <br /> then sample <br /> N15 Bail 2 CV's then sample, or pump dry, let recover 15 minutes <br /> then pump dry again and sample last discharge <br /> N16 Bail or pump out one CV then sample when conductivity has <br /> stabilized <br /> N17P1 As above for Well N16 <br /> N18/18P1 Bail or pump out 2 CV's, then sample after last bail <br /> N19 As above for Well N18 <br /> N20 As above for Well N14 <br /> N21 Bail or pump out 2 CV's, then sample <br /> N22 As above for Well N21 <br /> Notes: Well GW-N1 is sampled annually for comparison purposes. Well GW-N4 is no longer <br /> sampled due to redundance with N4R. Wells GW-N5 is mined through and N6 is not <br /> sampled in response to a 1983 CMLRD request (Appendix 15-1, Page 15-1-12). Well <br /> GW-N17 is not sampled due to possible inconsistencies in its completion. <br /> 15-20 Revised 04/11/88 <br />