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~J <br />' 11. <br />' 6. WATER CHEMISTRY <br />' 6.1 WATER SAMPLING AND CHEMICAL ANALYSES <br />A number of water quality monitoring stations have been <br />established on the property by CRCC. Available analyses date <br />back to October, 1980 and locating of both surface water and <br />groundwater stations are indicated on plate 1. Water samples <br />' have been monitored in Stollsteimer Creek, both upstream and <br />downstream of the present mine operations. Monitoring wells <br />' include both rock holes and wells installed in the alluvial <br />valley floor (AVF). <br />' The frequency of sampling by CRCC personnel has generally been <br />monthly, however no sampling data is available for the 1981-1982 <br />' winter months. Available chemical analyses for each sample have <br />been presented previously to the CMLRD. Tests conducted on each <br />sample range from partial, involving pH, electrical conduc- <br />tivity, temperature and alkalinity measured in the field, to <br />' complete inorganic analyses including trace elements and major <br />cations and anions. <br />' 6.2 DISTRIBUTION AND EVALUATION OF MAJOR ION CHEMISTRY <br />' The gross chemical compaction of typical groundwaters and sur- <br />face waters have been analysed and illustrated in a Piper <br />' diagram Fig. 4. This figure shows that most of the water is <br />either Ca-HC03 or Ca-SOq type water and only some of the deeper <br />groundwaters are Na-HC03 type (Samples from W-3, W-2 and W-9). <br />Sodium ion concentrations range from 25 to about 250 mg/L while <br />chloride concentrations are generally less than 50 mg/L. <br /> <br />\, D R PILE AUB ASSDCiA iES LIMITED <br />