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Fdmnry 1000 HmABi Cndd~ Temnu~ !rc * 1999 Amn! HXbofag~Repcor ~ Prye 3 <br />' 3.0 HYDROLOGIC MONITORING <br />' 3.1 SAMPLING AND MEASURING TECHNIQUES <br /> Field conductivity and pH me[ers were calibrated prior to each days use. The conductivity meter was <br /> calibrated using a potazsium chloride solution with an electrical conductivity in the 78 to 6,668 micro- <br />t Siemens per centimeter (µS/cm) range. The pH meter was calibrated using NBS traceable buffets <br /> with pH values of 7 and 10. Groundwater level measurements were taken with a water level indicator. <br />' Surface water flow was measured with a Flow Probe portable velocity meter. <br /> Table 1, NPDES Analytical Lut, presents the parameter list for the NPDES samples. Table 2, Surface <br /> Water Analytical List, shows the laboratory analyses for the surface water samples. Table 3, <br />' Groundwater Analytical List, presents the laboratory analyses for the groundwater samples. Analyses <br /> were performed by ACZ Laboratories, Inc. (ACZ) of Steamboat Springs, Colorado. ACZ performs all <br /> analyses by EPA or equivalent methods. Samples were generally hand-delivered to the lab the day of <br />' collection in an iced cooler. <br /> 3.2 SURFACE WATER DATA <br /> 3.2.1 NPDES Monitoring <br /> There are taro NPDES monitoring sites at the Loadout, the Tmck Loop Pond (Outfall OOlA), <br /> identified az NPDESIH in the data sumntarytables, and the Rail Loop Pond (Outfall 002A), identified <br /> az NPDES2H in the data summary tables. The locations of the two NPDES monitoring sites are <br /> shown on Figure 1, Monitoring Site Location Map. <br />1 <br /> During 1999, no discharge waz observed at either site. Appendix A includes a listing of water quality <br /> statistics for previous years for the Loadout NPDES sites. <br />' Per the requirements of the NPDES permit, No. COG-850008, quarterly Discharge Monitoring <br /> Reports (DMRs) were submitted to the appropriate regulatory agencies. Copies of the 1999 DMRs are <br />' provided in Appendix B, NPDES Discharge Monitoring Reports. <br /> 3.2.2 Stream Monitoring <br />' Two stream monitoring locations were sampled in the vicinity of the Loadout along Dry Creek. <br />Monitonng consorted of Berm-annual (spring and fall) monitortng for flow and water quality. The <br />upstream surface water monitoring site (HGSD1) is located approximately 1.5 miles upstream of the <br />' Loadout permit boundary. The dowastream surface water monitoring site (I-iGSD}J,'is ;located <br />immodiatelydownstream of the Loadout. The locations of HGSDl and HGSD3 are shown oii.Figute <br />1, Monitoring Site Location Map. <br />1 <br /> <br />1 <br />Surface water quality data for 1999 are included in Appendix C, Surface Water Quality Data. Water <br />quality analyses for both HGSD 1 and HGSD3 indicates that constituent concentrations were generally <br />within the range of previously observed values. The alkalinity az bicarbonate concentration, 603 <br />nulligrams per liter (mg/1), reported for the December 1999 sample at HGSD3 waz higher than <br />previously observed values. The ammonia az nitrogen concentration, 0.48 mg/l, reported for the <br />December 1999 sample at HGSDl was also higher than previously observed values. This <br />concentration spike u probably a result of agricultural operations located upstream of the loadout. <br />Manganese concentrations from both June and December samples were higher than previously <br />observed values at both HGSDl and HGSD3. The June samples from both sites had similar <br />concentrations. In December, manganese concentrations in the HGSDl sample were significatly <br />Matbvrrry Wrmm `P.D Ba< 774018 `S~lAa Sprcg, Q~80477 "(970J 8796260 <br />~u~~n~w,~rr.,...uyw <br />v:~ro'y <br />