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ineasured are shown in the following table. Because historic and recent water quality data from <br />Sump Number One indicates that uranium is the only constituent requiring treatment to meet <br />water quality standards in Ralston Creek, Cotter proposes modifying the daily discharge <br />sampling and analysis requirement for radium 226+228 to a monthly composite, and pH, and <br />oil/grease to a weekly composite to be collected with the weekly uranium sample. Daily <br />sampling and analysis for these parameters would be excessive and unnecessarily onerous to <br />implement. <br />pwamater MeaszummaatFraguncy SamplaType <br />Now, MOD Continuous Recorder <br />COD, mgA Once per month Composite <br />TSB mgA Once per month Composite <br />Uranium, PD, ug4 Weekly Composite <br />Radium 226+228 (total), pCiR Once per month Composite <br />P9 s.u, weekly drab <br />Oil and Grease, mgll Weekly Visual <br />Antimony, TR ug4 Once per month Composite <br />Boron mg4 Once per month Composite <br />Chromium, TR ug/I Once per month Composite <br />Copper, PD, ug/I Once per month Composite <br />Silver, PD, ugR Once per month Composite <br />Zinc, PD, ug/I Once per month Composite <br />Cyanide, WAD, ugli Once per month Grab <br />Fluoride, mg4 Once per month Composite <br />Thallium, TR, ug4 Once per month Composite <br />Whole Effluent Toxicity, Chronic Lethality <br />Ceriodaphnia species Semi-annually 3 Composites/Test <br />Fathead Minnow (Pimephalespromelas) Annually (first halfofyear) 3 CompositeslTest <br />1 ariri%!ecluenfsnate .agr Jar 1t_lrallEetoileste a anahzr far ldandgrexe.:Itsremit: aretvFe rrpartedonthfD.1 Ranier <br />yaralnster0355: <br />In addition to the above discharge monitoring program for interim water treatment, Cotter <br />will conduct stream sampling for locations, parameters, and frequencies as identified in <br />the following table. Sampling locations are also shown in the following map figure: <br />Station Name Northing Easting Elevation Description Sampling Frequency /Parameters <br />SW-AWD 734870.0 2059850.0 6639.9 Above Waste Dump (above site) 1,2 <br />SW-A001 733673.75 2061141.35 6590.57 Above Discharge (outfall 001) 1 <br />SW-BDIS 733336.16 2061476.31 6577.34 Below Discharge (outfall 001) 1 <br />SW-PL 733088.71 2061744.42 6563.94 Parking Lot 1 <br />SW-OS 732902.10 2062102.41 6551.92 Ore Sorter 1 <br />SW-BOS 732696.77 2062307.12 6533.43 Below Ore Sorter 1 <br />SW-GS 732466.73 2062546.19 6533.43 Guard Shack 1 <br />SW-BPL 732144.38 2063063.84 6508.97 Below Property Line (below site) 1,2 <br />i -vveeKly (uranium; neio measuremenu ul temp, pn, a1N GV1NUb -Yj <br />2- Monthly [uranium (total 81 dissolved); molybdenum (total & dissolved); phosphorus; phosphate; nitrate+nimte; <br />gross alpha; gross beta; total dissolved solids; total suspended solids; radium 226+228 (total); pH; <br />antimony (total); boron; chromium (total); copper (dissolved); silver (dissolved): zinc (dissolved); <br />cyanide (weak acid dissociable); fluoride; thallium (total)] <br />6