Laserfiche WebLink
Table 4 summaries the proposed commercial production monitoring plan. During commercial <br />operation water levels will be monitored: continuously using water level probes at dissolution surface <br />monitoring sites, and monthly with a manual measuring device at all other locations. Information <br />provided from the first five years of operation indicates that water level monitoring is the best primary <br />indicator of an influence from solution mining. Ground-water sampling would continue to take place on <br />a quarterly frequency. All proposed laboratory and field constituents are the same for both the temporary <br />suspension and commercial production time periods. The only difference is the frequency stipulated for <br />level measurements. In the event that the monitoring data indicate elevated occurrences of constituents, <br />increased monitoring frequency may be required. <br />1\o water quality sampling is required at Well 20-4A in either the interim status or conunercial <br />production ~l~onitoring plans. Well 20-4A is a re-completed B-Groove numitorin~ well that shows <br />elevated pI1 as a result of cement contact through the wJell perforations. Only water level data is of value <br />from this well. Well 19-3 was drilled to detect leakage from an evaporation pond that was never <br />constructed, and has never had sufficient water to collect a sample. ~'4'ell 19-3 will be checked for water <br />level during each sampling event and if suff cient water is present a sample will he collected. <br />Table 3 -Temporary Suspension -Monitoring Plan <br />Well Water Levels I Field Water Quality Parameters <br />Parameters See Table _5 for schedule) <br />~requency j Quarterly Quarterly Quarterly <br />~ Well 28-1 X X X <br />Well 21-2 X X _ X <br />Well 21-5 <br />- X <br />- _ X X <br />- <br />Well 19-3 X ~ When sufficient water is present to collect <br /> sample. <br />U er A uifer-Units <br /> <br />We11 20-8 <br />X <br />X ___ <br />X <br />Well 21-4U _ <br />Well21-3U X <br />X X ~ <br />X X _ <br />~ <br />Well 29-4U _ X _ <br />X <br />X X <br />Well 20-10 <br />---- X X X <br />Well 20-5 X - -- X <br />X <br />Upper Aquifer - A Gro <br />Wel 121-3A ! ove <br />X -- <br />~ X <br />- <br />Well21-~1.A X _ - <br />- - - X <br />_ X X <br />Well 29-4A __ I X X X <br />Well 29-3 X X X <br />Well 19-2 X X X <br />Well 20-4A X <br /> <br />Lower A uifer - B Gro <br />Well 21-36 <br />ove <br />X - - <br />_ <br />X <br /> <br />Well 21--1B- -- ---- <br />- X . <br />, <br />~, <br />X <br />-- X --- - X <br />Well 29-2 X <br />F[NAL Aeidendum to SOB For Modification No. 9, UIC Area Permit Vo. 0030858-00000 Page 19 vJ'?9 <br />