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Table 1 <br />Monitoring Parameters, Analytical Methods, Detection Limits, Preservation, and Maximum Holding Times <br />Parameter Field or Laboratory <br />Anal sis Analytical <br />Method Method Detection <br />Limit Container Preservation Maximum <br />Holdin Time <br /> <br />H Field EPA 150.1 0.01 standard units P, G None 24 hours <br />S ecific Conductance Field EPA 120.1 1%or 1 S/cm P G None 24 hours <br />H Laborato EPA 150.1 0.01 standard units P G None 24 hours <br />S ecific Conductance Laborato EPA 120.1 1%or 1 S/cm P, G None 24 hours <br />Selenium, total Laborato EPA 7740 0.005 m P, G HNOs to H < 2 6 months <br />Thallium total Laborato EPA 7841 0.002 m P G HN03 to H < 2 6 months <br />U. S. Environmental Protection Agency. 1983, pH Method 150.1 (Electrometric) in Methods for Chemical Analysis of Water and Wastes, EPA 600/4-79-020, <br />Revised March 1983. <br />' P = polyethylene; G =glass. <br />" U. S. Environmental Protection Agency, 1983, Conductance Method 120.1 (Specific Conductance) in Methods for Chemical Analysis of Water and Wastes. <br />EPA 600/4-79-020, Revised March 1983. <br />s The method detection limit is 1%or 1µS/cm, whichever is greater. <br />e U. S. Environmental Protection Agency, 1986, Method 7740, Selenium (Atomic Absorption, Furnace Technique) in Test Methods for Evaluating Solid Waste: <br />PhvsicaUChemical Methods, 3rd Edition, EPA 530/SW-846, November. <br />' U. S. Environmental Protection Agency, 1986, Method 7841, Thallium (Atomic Absorption, Fumace Technique) in Tes[ Methods for Evaluating Solid Waste: <br />PhvsicaVChemical Methods, 3`d Edition. EPA 530/SW-846, November. <br />l J <br />• <br />