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Site <br />NPDESI6 <br />NPDESI6 <br />NPDES6 <br />Date <br />4/1/03 <br />6/3/03 <br />9/8/03 <br />6/2/03 <br />9/8/03 <br />WSDS, 9/8/03 <br />WSH7 " <br />WSHF1 " <br />A = exceedence <br />NH3+NH4,mg/1 pH Temp,C $NH3 NH3 conc., mg/1 <br />1.1 8 .05 1 1.0 0. 01 <br />4.6 8 .30 16.5 5.7 0. 26 A <br />p.9 8 .26 16 5.1 0. 05 <br />0.3 8 .13 16 3.8 0. 01 <br />0.5 8 .16 14.5 3.7 0. 02 <br />0.2 8 .23 14.8 4.4 0. 01 <br />0.3 8 .25 11.5 3.6 0. 01 <br />0.3 8 .07 11.8 2.4 0. 01 <br />Only one sample exceeded the ammonia standard, the Sune sample from <br />NPDESI6. Values from stream sites downstream collected on the same day <br />did not exceed the standard. Ammonium nitrate blasting agent is most <br />likely the source. These values will subside after mining. <br /> Sulfide values also require extra calculations. The standard is 0.002 <br />• mg/1 un- ionized H2 S, while the m ethod detects for un-i onized H2S and <br /> ionized HS. The following table calculates the actual un-ionized H2S <br /> concentration of the exceedences reported on Ta ble 12. Sulfide values <br /> were cal culated from a table fo und on page 5 of the Internet site <br /> http://www.cpda.co.uk/techn/clay/w2253.pdf. <br /> Site Date H2S+HS,mg/1 pH ~H25 H2 S conc., mg/1 <br /> NPDESIS 4(15/03 0.07 7.84 14 0. 010 A <br /> NPDESS 4/21/03 0.03 8.55 3.0 0. 001 <br /> NPDES6 4/1/03 0.06 8.15 8.2 0. 005 A <br /> WSDS 0.15 8.47 3.5 0. 005 A <br /> ^ 6/2/03 0.04 8.45 3.5 0. 001 <br /> WSH7 4/1/03 0.70 8.16 6.7 0. 047 A <br /> " 6/2/03 0.10 8.16 6.7 0. 007 A <br /> WSHF1 4/1/03 0.40 8.41 3.9 0. 016 A <br /> " 6/2/03 0.02 8.13 7.0 0. 001 <br /> " 9/8/03 0.05 8.07 S.0 0. 004 A <br /> WSSF3 4/14/03 0.04 8.30 4.9 0. 002 <br /> A = exceedence <br />23 <br />