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ACAW-1 Alluvial well located in the Apache Canyon Alluvium at the mouth of <br /> Apache Canyon. Established to monitor potential effects of secondary <br /> or retreat mining. <br /> Contained in the following sections is a description of the methods and results of the <br /> 1984 water year of monitoring activities conducted at the New Elk and Golden Eagle Mine <br /> sites. <br /> 2.0 MONITORING METHODS <br /> 2.1 Surface Water <br /> Monthly surface water samplings were conducted at each of the five designated <br /> stations PRS-I, PRS-2, PRS-3, MDNE-1 and MDGE-1 during the last week of each month. <br /> Quarterly surface water samplings were conducted at each of the six designated stations <br /> CCS-1, CCS-2; SCF-I, ACF-1, MDNE-1 and MDGE-1 during the last week of February, <br /> May, August and November. Annual water quality sampling was conducted during <br /> November for each station. <br /> During each monthly sampling, in-situ water quality measurements of temperature, <br /> conductivity and pH were made using a Hydro Lab Model 4000 field sampling kit. An <br /> expanded list of water quality parameters was collected during the quarterly and annual <br /> samplings which were sent to Core Laboratories, Inc., of Denver for laboratory analysis. <br /> Filtration of certain water quality parameters was accomplished in the field with a <br /> Geotech 2.4 liter barrel filter. <br /> Quality control of water analyses was performed by two methods. Prior to any field <br /> sampling, the Hydro Lab Sampling Kit was calibrated to known standards produced in the <br /> laboratory. A record of each calibration was kept as to the date, person performing the <br /> calibration, and adjustments made. Also, in August all electronic components of the <br /> Hydro Lab were checked and calibrated by Sienco Instrumentation Service of Denver. <br /> Core Laboratories, Inc. maintains internal quality control of sample handling and <br /> instrumentation calibration. During the November sampling, one of the samples was split <br /> in the field and half was submitted to the lab as a blank. Analyses were compared and all <br /> were found to be within five percent. <br /> -6- <br />