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Total dissolved solids (TDS), magnesium (Mg), sodium (Na) and sulfate (SO,)) concentrations <br />in Well HGDALS are generally twice those measured in We11 HGDAL2, Following the <br />completion of well HGDAL3 in November 1993, the groundwater quality data demonstrates that <br />a similar groundwater chemistry pattern exists between HGDALI and HGDAL3 as what existed <br />between HGDALI and HGDAL2. The TDS, Mg, Na and SOy concentrations measured in well HGDALI <br />were generally three times the corresponding concentrations measured in well HGDAL3, <br />however, they were generally only twice those measured in well HGDAL2. The TDS <br />concentrations at well HGDALI ranged from 15,000 mg/1 to 60,000 mg/1 while the TDS <br />concentrations at well HGDAL2 ranged from 2,000 mg/1 and 28,000 mg/1 and at well HGDAL3 <br />ranged from 19,000 to 19,000 mq/1. The TDS value at HGDAL2 for 08/13/90 appears to be <br />erroneous as the SOq concentration is 13 times the reported TDS value. <br />Prior to 1993, trace metal constituents (aluminum [Al), boron [B7, cadmium [Cd7, copper <br />[CU], iron [Ee], lead [Pb], manganese [Mnl, molybdenum [MO], selenium (Se7 and zinc [Zn] <br />were analyzed for the total fraction. Following the acquisition of the Loadout by HGTI, <br />the analytical analysis for groundwater trace metal constituents was changed to the <br />dissolved fraction. The current groundwater analytical suite is presented in Table 13-2 <br />under Tab 13. <br />r ~• <br />LJ <br />n <br />TR-07 la Revised 03/06 <br />