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identified a seep along the northern bank of the Rito Seco on October 27, 1998. Preliminary field <br />water quality evaluation (i.e., pH, specific conductance, temperature) of the seep water identified <br />an elevated specific conductance. BMRI subsequently reported the seep and preliminary water <br />quality measurements to the CDMG and the CDPH on October 28, 1998. An interceptor trench <br />and french drain were constructed to collect the seep water. The water was pumped from the <br />french drain collection sump back to the West Pit. A revised monitoring plan was prepared and <br />submitted to CDMG on November 16, 1998 addressing the new information. Approval of the <br />revised response plan was received from CDMG on December 02, 1998 to proceed with the <br />actions proposed in the revised response plan. Initiation of those actions were began in <br />December with the installation and completion of seven (7) new ground water monitoring wells to <br />assist characterizing and better understanding the hydrology and geochemistry ~f the West Pit. <br />Weekly and bi-weekly sampling, in accordance with NOV abatement requirement No. 3, and <br />water level reading frequency continued throughout the year. Analytical reports nave been <br />submitted to the DMG upon receipt from the lab. <br />Lysimeters have been checked quarterly throughout the year and have remainej dry. <br />Sampling of the San Luis town well and The Shalom Ranch well occurred in Jaruary and July <br />and results have been forwarded to the applicable parties. <br />The underdrain at the base of the tailings embankment was monitored monthly for rate of <br />seepage. The underdrain continually flowed at an average of 30 gpm. <br />Results from the humidity cell testing was reported as received from the lab. <br />Staff gauges were read daily from April -June and weekly during the other months. RS-4 and <br />RS-6 continue to be dry. The staff gauges received routine maintenance during the year. <br />The tailings embankment piezometers have been checked and monitored monthly. <br />The collection pond leak detection system was sampled and pumped monthly fcr seven <br />months. The system was frozen in the months of December, January, February and March. <br />When we tried to sample the system in April the pump failed and we were unable to sample. <br />The average leakage rate was approximately 25 gpad. <br />As specified in the approved TR-010, weekly and monthly pond compliance reports have <br />been submitted to DMG. <br />