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Conductivities historically exhibited by the spring aze presented as Figure 109. A statistical water quality <br />summary for the site is presented as Table 51 a. Several measured parameters occurred outside of the previously <br />established range in May 1996. New minimums were estab]ished for field temperature, calcium, magnesium, <br />sodium, lab conductivity, hardness, nitrate, nitrate/nitrite as N, TSS, and sulfate in May in conjunction with the <br />maximum flow ever recorded at the site (Table 51). <br />SPOIL SPRING MONITORING <br />Two spoil spring sites, 7 and the 303 series, require monitoring under the approved program at TCC. Spoil spring <br />7 is monitored in accordance with the approved spoil spring monitoring program. The spoil spring monitoring <br />program was initiated in 1986 and is conducted annually. [n accordance with the approved plan, the annual mine <br />wide survey is conducted during May with springs measured for flow and fteld parameters. If a spring is <br />discharging at or above 35 gallons per minute it is monitored for the next year in accordance with the monitoring <br />plan. During the 1996 Water Year, spoil spring 7 flow was not measured in excess of 35 gpm and consequently <br />additional monitoring requirements were not triggered. November, March, and Apri] data is presented as the <br />additional monitoring from the spoil spring survey program was triggered in 1995. A water quality sample was <br />obtained in early June from this site even though the 35 gpm criteria requiring sampling under the 1996 spoil <br />spring monitoring program was not met. Quarterly flow and field parameter data along with semi-annual water <br />quality sampling is required from this site in addition to the spoil spring monitoring requirements. 1996 Water <br />Year data for this site is presented as Table 52. A statistical water quality summary for the site is presented as <br />Table 52a. Anomalous water quality instances observed at this site include elevated total recoverable manganese, <br />bicarbonate, total alkalinity, and lab conductivity values recorded in June. <br />The 303 series spoil springs require monitoring on asemi-annual basis for flows, field parameters, and water <br />quality samples. During 1996, water quality samples for these sites were obtained from composite site 87-i. The <br />second semi-annual water quality sample was collected in November. Tables 53 through 55 provide summaries <br />of the 1996 Water Year data collected at each 303 series spoil spring. Table 53a provides a period of record <br />statistical summary of collected data at site composite 87-]. Figure ] ]0 provides a graphical representation of <br />period of record field conductivity for spoil spring 303-1. Several water quality parameters were documented <br />outside of the previously established ranges at this site in May (Table 53). Calcium, magnesium, total recoverable <br />manganese, total recoverable silver, lab conductivity, hardness, TDS and sulfate values remained elevated in <br />November. <br /> <br />-l2- <br />