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2.9 Proposed Hydrological Monitoring and Analysis Reductions for 1990. <br />Trapper proposes and requests Division approval to reduce the following hydrological <br />monitoring and analyses criteria from our approved program (Sections 4.8.S.la and <br />4.8.5.2a). These reductions are based on historical data trends and recommendations <br />from Hydra Engineering Inc. <br />2.9.1 Parameter Reductions <br />These proposed reductions affect Table 4.8-12a, pages 4-241(c,d): <br />Vanadium <br />Drop from list A-1 (surface water) and lists B and D (groundwater). There are <br />no suspect levels and analytical values have historically been near the detection <br />limit for almost all samples. The highest detected concentration in 15 years was <br />0.20 ppm (1983). <br />Total Dissolved Solids (TDS) <br />Reduce TDS sampling frequency to the NPDES quarterly requirement for all <br />surface water sites. Monitor interim salinity levels with field specific conduc- <br />.~ [ante. Drop TDS from groundwater lists C, D and E. Analyze for TDS during <br />the third quarter annually (LIST B) to verify salinity trends between TDS and <br />specific conductance. <br />Total Concentrations <br />Drop all Total concentrations for Arsenic, Barium, Cadmium, Chromium, <br />Copper and Selenium from lists B, D and E. Monitor groundwater parameters <br />as dissolved concentrations until the Division requires otherwise. However con- <br />tinue dissolved and total concentrations for Iron, Lead and Manganese for ttte <br />current permit period (1988-1992). Then drop all '"Total" in the next permit <br />period (1993). <br />Ash Wells <br />Reduce sampling from list D to list C. All list D parameters are included in the <br />annual sampling (list B) and there are no indications of suspect levels for the <br />eight additional parameters. <br />Lux Well <br />Has been monitored for List E the agreed upon year (9/85-9/1989). There have <br />been no suspect levels and the data has been consistent. We propose reducing <br />,~~. sampling to list C quarterly and List B annually. <br />~rinn__..:._._=.ay <br />