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4.0 RECOMMENDATIONS <br />This report combines recommendations from the 2006 and 2007 annual reports. These reports were not reviewed by the <br />Colorado Division of Mining Reclamation and Safety in prior years. <br />Recommended modifications to the analyte list are shown below and are based on: 1) results to-date; 2) likely groundwater <br />contaminates originating from similar operations to the Lupton Lakes mining operation; and 3) that dewatering water will now <br />be discharged into the South Platte River and not recharged into the groundwater. <br />• Standard Parameters will remain the same. <br />• Remove chloride, carbonate, bicarbonate, magnesium, iron, sodium, fluoride, and calcium from the Drinking Quality <br />Parameters. <br />• Remove total phosphate, mercury, fecal coliform, chlorinated pesticides, and herbicides from the Extended <br />Parameter list. <br />Well CRMW02 will be removed from the sampling list since it is not accessible. Four upgradient wells (CRMW04, 09, 40, & <br />42) and three downgradient wells (CRMW01, 06, & 16) will still be sampled. The 2009 groundwater monitoring schedule <br />follows: <br />Table 1: 2009 Groundwater Monitoring Schedule <br />Sampling <br />Event <br />Date Water <br />Levels Sampling Locations <br />Stnd1/DQP2 <br />Extended3 Reporting <br />Quarterly Annually <br />09-1 Jan-09 X 1, 4, 6, 9,16, 40, 42 None X <br />09-2 Apr-09 X 1, 4, 6, 9, 16, 40,42 1, 4, 6, 40 X <br />09-3 Jul-09 X 1, 4, 6, 9,16, 40, 42 None X <br />09-4 Oct-09 X 1, 4, 6, 9,16, 40, 42 1, 4, 6, 40 X <br />Notes: 1. Standard Parameters include: <br />- pH (Field/SM2540-C) <br />- Temperature (Field) <br />- Conductivity (Field/5M 2510-B) <br />- Turbidity (SM 2130-B) <br />- Total Suspended Solids (TSS) (SM 2540-D) <br />2. Drinking Quality Parameters (DQP) include: <br />- Sulfate <br />- Nitrate <br />- Total Dissolved Solids (TDS) <br />3. Extended Parameters (SDWA) specifically include: <br />- Arsenic <br />- TEPH (8015 mod.) <br />- BTEX + MTBE (8021 mod.) <br />JADenverWater-1511 1. EnvironmentaU008 DMG Samplingl0ctober 08 Samplingl0ct 08- annual report.doc <br />Annual 2UU8 Sampling Report - Lupton Lakes -19- December 2008