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<br />TABLE 4 <br /> <br />Occidental Oil Shale, Inc. -Logan Wash <br />Surface Water Monitoring -STATION UN-1' <br /> Monitoring Frequency <br />Parameter <br />Weekl a <br />Monthl <br />uarterl ° <br />Flow X X X <br />Visible Oil & Greases X X X <br />Field pH, Conductivity, Temperature, <br />Dissolved Oxygen X X X <br />Alkalinity X X <br />To[alb Inorganics: Boron ,Fluoride X <br />Anions: Sulfate, Chloride X X <br />Nutrients: Ammonia, Nitrate, Nitrite X <br />Total Dissolved Metals: Calcium, <br />Cadmium, Copper, Chromium VI, Uon, <br />Manganese, Magnesium, Arsenic, <br />Nickel, Lead, Silver, Zinc X X X <br />Total Recoverable Metals: Arsenic, <br />Chromium ~, Iron, Selenium, <br />Manganese, Mercury (Total) X X X <br />Volatiles (BTEX) X X X <br />Semivolatiles X <br />Footnotes: <br />Station UN-1 is defined as the unnamed drainage at the highway near the mouth. <br />~ Weekly sampling is required from March through June. <br />' Monthly sampling is required from July through February. <br />° Quarterly sampling for all listed parameters is to be conducted in March, June, September, and <br />December. <br />s If a visible sheen is observed, a sample should be taken. <br />° Boron and fluoride listed as total recoverable in State standards; actually sampled for total. <br />[p:\oxy\logan\UN- l .tbl ] <br />