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<br />LABORATORY ANALYSIS OF INDUSTRIAL <br />WASTEWATER AND WATERCOURSE SAMPLES <br /> <br />To attain analysis objectives, the Environmental Specialist, under <br />self-direction, is responsible for all aspects of analyzing unknowns <br />for biological and chemical composition, including: determination of <br />tests and quality control work to be performed, performance of all <br />laboratory analyses according to "Approved Methods" as defined in <br />Section 30-60 (2) of the Industrail Waste Ordinance (specific test <br />methods are cataloged below), modification of "Approved Methods. <br />(current modifications are listed for each test below), preparation of <br />standard reagents and curves, preparation and assessment of data, and <br />design and performance of special studies as initiated or directed. <br /> <br />I. <br /> <br />Categorical Tests <br /> <br />A. <br /> <br />Biochemical Oxygen Demand - Standard Methods for the <br />Examination of Water and Wastewater, 15th Edition (Std. <br />Methods, 15th ed., Part 507) <br /> <br />B. <br /> <br />Chemical Oxygen Demand <br /> <br />1. <br />2. <br /> <br />Proc~dure - Std. Methods, 15th ed., Part 508 <br /> <br />Modification <br /> <br />a. <br /> <br />Normality of Ferrous Ammonium <br />from 0.10 N to 0.50 N <br /> <br />Sulfate <br /> <br />increased <br /> <br />b. <br /> <br />Normality of Potassium Dichromate increased <br />0.25 N to 1.00 N <br /> <br />from <br /> <br />c. <br /> <br />Total Suspended Solids - Std. Methods 15th ed., <br />Part 208 D (Total Nonfiltrable residue dried at <br />103°C) <br /> <br />d. <br /> <br />pH - Std. Methods 15th ed. Part 402 <br /> <br />II. <br /> <br />Determination of Metals <br /> <br />The following metals are quantitatively determined by use of the <br />Perkin-E~er 603 Atomic Absorption Spectrophotometer and <br />Instrumentation Laboratory 551Spectrophotometer: Barium, <br />Cadmium, Chromium, Copper, Lead, Manganese, Mercury, Nickel, <br />Selenium, Silver, Zinc and Iron. <br /> <br />III. Determination of Inorganic Nonmetallic Constituents <br /> <br />A. <br /> <br />Arsenic - Std. Methods, 15th ed., <br />Abosorption Spectrophotometric Method) <br /> <br />Part <br /> <br />404 <br /> <br />(Atomic <br /> <br />-77- <br />