Laserfiche WebLink
Site HGSD1 is upstream of the Loadout. This site is normally monitored <br />twice a year, once in the spring and once in the fall. This site <br />displays an increasing TDS trend, with the TDS peak occurring in October <br />2002. <br />Site HGSD3 is downstream of the Loadout. This site indicates an <br />increasing TDS trend, with the peak TDS occurring in April 1995. <br />Table 3 provides a comparison of this year's surface water quality to <br />CDPHE receiving stream standards for Dry Creek (Yampa Segment 13d, <br />Regulation No. 33, January 2009) . This Paradox database generated table <br />does not include the units of concentration (mg /l or ug /1) for each <br />parameter. The units used for each parameter are the same as those <br />listed on the Surface Water Parameter List (Table 1) and are also the <br />same as those used in the water quality reports. The frequency column on <br />Table 3 indicates, in this order: uncensored, that is, the number of <br />exceedances above the Method Detection Limit (MDL) / the number of <br />exceedances between the MDL and the Practical Quantitation Level (PQL) / <br />censored, that is, the number of sample values below the MDL but the MDL <br />was higher than the standard / the total number of samples. Below is a <br />summary of standards that were exceeded. <br />For upstream Site HGSD1, the total recoverable iron standard (1.0 mg /1) <br />was exceeded twice in October, with a value of 1.01 mg /l each time. <br />Exceedances were a result of high suspended solids (> 25 mg/ 1). <br />HGT ran selenium in three forms this year, often on the same samples, so <br />as to investigate the difference in the three methods. However, in a <br />regulatory sense, the potentially dissolved form is applicable to NPDES <br />sites, and the dissolved form is applicable to stream sites. The total <br />recoverable form was run only as a quality control check. The following <br />discussion will focus only on potential dissolved excursions at NPDES <br />sites and dissolved excursions at steam sites. There were no excursions <br />at NPDES Sites this year. <br />3 <br />