2014-11-21_PERMIT FILE - C1996084 (23)

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• absorption ratios (SARs) were compared to the Mined Land Reclamation Standards Division Procedures for the Assessment of Material Damage with Respect to Alluvial Valley Floors, the Cumulative Hydrologic Impact Assessment, and Subsidence at Coal Mines (11/87). The area has been extensively developed for stock water use. Windmills extract water from colluvial/alluvial materials in the canyon bottoms, and a large number of ponds have been constructed to store water. Spring SPCWC-1 is one spring that is obviously developed for this use. This spring has a pond constructed to retain the spring discharge. Springs SPCYC-1 and SPLJC-1 have ponds constructed above the emanation point; these ponds appear to be runoff retention ponds and are not associated with the spring, but may protect the springs from washouts. Exceedances in the metals standards were also determined. Since the standards for dissolved silver, free cyanide, dissolved copper, and dissolved mercury are very low, the detection limits for these samples often exceeded the standard. Iron standards for total recoverable values were exceeded at sites SPBC-2 and SPCYC-1. The CDMG material damage standards were exceeded at SPCY-1. Ammonia, nitrite, and nitrate as N (dissolved) standards were exceeded at all sites. This occurs also since the standazd for these constituents are also low. Stations SPBC-2, SPBC-3, SPBC, SPCC-1, SPCWC-1 and SPLiC exceeded the standard for dissolved lead. The maximum specific conductance values ranged from 724 µmhos/cm to 1193 µmhos/cm at SPBC-1, SPBC-2, SPBC-3, SPBC-4, SPBC-5, SPCC-1, SPCYC-1, and SPLTC-1 exceeding the CDMG material • damage standard of 700 µmhos/cm. SARs for the surface stations were below 4.0 at all stations. The highest value was reported from the samples SPLiC-1. This sample had a conductivities of 1025 µmhos with a corresponding SAR of 3.45. The lowest value was obtained from the station AC-1. This station had a conductivity of 491 µmhos with a corresponding SAR of 1.15. Ponds At each of the eighteen pond sites, field parameters and staff gauge readings were acquired quarterly during the baseline monitoring period. Field parameters obtained from the ponds were temperature, pH, conductance and dissolved oxygen. Parameters for the sites varied with pH ranging from 5.50 to 9.75, conductances ranging from 120 µmhos to 2240 µmhos, and dissolved oxygen ranged from 1.6 to 12.0 mg/L. Water levels in the ponds were fairly stationary in the case of ponds PCC-1, PCWC-5, PCWC-8, and PUD-1. All other ponds experienced fluctuations, generally with the highest levels in the month of August, and lower levels during the spring and summer monitoring. C~ PERMR.~75\Oexmber Z0. 1996 2.04-31