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Lprencirp Canyon Mine -Surface Water Technical Report <br />• The area has been extensively developed for stock water use. Windmills extract water from <br />colluvial/alluvial materials in the canyon bottoms, and a large number of ponds have been <br />constructed to store water. Spring SPCWC-1 is one spring that is obviously developed for this <br />use. This spring has a pond constructed to retain the spring discharge. Springs SPCYC-1 and <br />SPLJC-1 have ponds constructed above the emanation point; these ponds appear to be runoff <br />retention ponds and are not associated with the spring, but may protect the springs from washouts. <br />Exceedances in the metals standards were also determined. Since the standards for dissolved <br />silver, tree cyanide, dissolved copper, and dissolved mercury are very low, the detection limits <br />for these samples often exceeded the standard. Iron standards for total recoverable values were <br />exceeded at sites SPBC-2 and SPCYC-1. The CDMG material damage standards were exceeded <br />at SPCY-1. Ammonia, nitrite, and nitrate as N (dissolved) standards were exceeded at all sites. <br />This occurs also since the standard for these constituents are also low. Stations SPBC-2, SPBC-3, <br />SPBC, SPCC-1, SPCWC-1 and SPLJC exceeded the standard for dissolved lead. The maximum <br />specific conductance values ranged from 724 µmhos/cm to 1193 µmhos/cm at SPBC-1, SPBC-2, <br />SPBC-3, SPBC-4, SPBC-5, SPCC-1, SPCYC-1, and SPLJC-1 exceeding the CDMG material <br />damage standard of 700 µmhos/cm. A table summarising the highest exceedances of the standazds <br />for each station is presented as Table SW-8. <br />SARs for the surface stations were below 4.0 at all stations. The highest value was reported from <br />• the samples SPLJC-1. This sample had a conductivity of 1025 µmhos with a corresponding SAR <br />of 3.45. The lowest value was obtained from the station AC-1. This station had a conductivity <br />of 491 µmhos with a corresponding SAR of 1.15. <br />Ponds <br />At each of the nineteen pond sites, field parameters and staff gauge readings were acquired <br />quarterly during the baseline monitoring period. Field parameters obtained from the ponds were <br />temperature, pH, conductance and dissolved oxygen. Sumtnazies of these pazameters are included <br />in Appendix SW-3. Parameters for the sites varied with pH ranging from 5.50 to 9.75, <br />conductances ranging from 120 µmhos to 2240 µmhos, and dissolved oxygen ranged from 1.6 to <br />12.0 mg/L. Water levels in the ponds were fairly stationary in the case of ponds PCC-1, PCWC- <br />5, PCWC-8, and PUD-1. All other ponds experienced fluctuations, generally with the highest <br />levels in the month of August, and lower levels during the spring and summer monitoring. <br />• <br />sw.;75\Decemb<r 4, 1996 21 <br />