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Quarterly Monitoring Report- Fourth Quarter 2014 Page 5 ' OAK RIDGE WINERY WKA No. 6364.07 December 18, 2014 ' 6.2 Site Groundwater Quality Results of fourth quarter 2014 analysis of groundwater from the Oak Ridge Winery process waste treatment facility compare to applicable water quality standards as follows: • Ammonia as nitrogen does not have a water quality standard established by MRP Order No. 05-01-172 or by EPA MCI-s; however, ammonia contributes to ' total nitrogen. Ammonia as nitrogen was detected in concentrations ranging between 1.1 and 5.0 mg/L in MW1, MW2, MW3, and MW4. ' • Potassium does not have a water quality standard established by MRP Order No. 05-01-172 or by EPA Primary or Secondary MCI-s; however, it contributes to total dissolved solids levels. Potassium was detected in water samples from ' each of the MW1, MW2, MW3 and MW 4 monitoring wells at concentrations between 17 and 38 mg/I. • Nitrate-as-nitrogen was not detected in any groundwater sample above the laboratory reporting limit of 0.50 mg/I. • Groundwater pH has a Secondary MCL acceptable range, previously discussed ' between 6.5 to 8.5. The sample from MW3 showed a pH of 6.38. The water samples in the remaining wells ranged in pH from 6.55 pH units to 6.88 pH units ' all of which are within the Secondary MCL acceptable range. • TKN as nitrogen does not have a defined acceptable or actionable limit in ' groundwater; however, concentrations may contribute to TDS and may produce oxygen deficient groundwater conditions. TKN is also indicative of incomplete oxidation of bio-available nitrogen compounds discharged to the process wastewater treatment system. TKN was detected in samples collected from all wells this quarter at concentrations ranging between 2.8 to 4.6 mg/L. • TDS concentrations in samples collected for this monitoring event were below the criterion established by MRP Order No. 05-01-172 (450 mg/1)with concentrations ranging between 120 to 410 mg/I. ' 7.0 EVALUATION OF CONSTITUENTS OF CONCERN The following presents a discussion of water quality trends at the site including a statistical data ' analysis per Title 27 Section 20415(e) (8) (A)-(E).