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/~-~G~-~ <br />RECE6VEC, / <br />3 00~ `' <br />MAR 0 2 ~~ <br />Division of Reclamation, <br /> <br />CEMEX Timeline <br />1-31-00 'rl~~[' Storage and monitoring plan approved <br />11-7-02 DMG notified CEMEX of the numeric protection levels (NFL's) for sampling <br />7-14-03 DMG recap letter of sampling requirements <br />4-16-04 1St non-compliant sample high Se and Ph (total selenium method) <br />5-19-04 2° non-compliant sample of high Se and Ph <br />6-18-04 DMG required ground water response plan/mitigation in form of TR by 7-26-04 <br />9-16-04 DMG requested input from DOW regarding Wildlife Resource Assessment Repo <br />9-24-04 Meeting DMG &CEMEX <br />10-4-04 CEMEX submits wildlife report regarding CKD <br />11-01-04 TR-04 submitted new sampling plan, impacts on C-pit water on groundwater quality <br />12-1-04 CEMEX required to submit a source removal and treatment plan. <br />12-17-04 Meeting DMG &CEMEX <br />2-28-OS TR-04 approved (AC) updated sampling, analysis and reporting plan <br />10-2005 CEMEX to assess remaining water in the pit; lower water within 12 months of <br />Approval. If water not removed in 1 year CEMEX will need to treat the water or <br />mitigate for wildlife impacts. <br /> Monitoring plan: <br />C-Pit- quarterly until water removed (same parameters as below) <br />A-Pit- monthly until detection well installed <br />Detection Well- quarterly <br />o dissolved selenium <br />o dissolved thallium <br />o pH <br />o total dissolved solids <br />o sulfates <br />o chlorides <br />11-1-OS required date to submit water treatment of C-Pit <br />12-1-OS DMG extended required date to submit water treatment plan of C-Pit water <br />12-19-OS TR-06 submitted to lower pH in spray tower <br />2-23-06 CEMEX requested to 4-15-06 to delay treatment of high pH water <br />3-1-OS CEMEX to begin implementation of TR-06 (treating high pH water) <br />1-17-06 TR-06 approved (with stipulation to submit TR to lower Se by 4-1-06) <br />3-22-06 Meeting DMG &CEMEX; method of sampling Se discussed <br />3-31-06 TR-07 TR required to addressing C-pit water to lower Se to 60 ug/1 for bonding purposes. <br />Bond for the water treatment plan ($735,000.00) <br />4-7-06 DMG approved extension to remove high pH water from C-Pit as required in <br />TR-06. Asper TR-04, water to be removed within 12 months of approval. <br />5-17-06 TR-07 Approval of TR-07 <br /> <br />