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WASTE DISCHARGE REQUIREMENTS GENERAL ORDER NO R5-2015-0012 <br />9 <br />IN-SITU GROUNDWATER REMEDIATION <br />AND DISCHARGE OF TREATED GROUNDWATER TO LAND <br />a. Pilot studies of limited extent and duration: <br />When the amendments have previously been demonstrated (previous <br />pilot tests or full-scale operations) to achieve the desired results and side <br />reactions, byproducts, breakdown products, and residuals are <br />understood. <br />When processes to remove byproducts, breakdown products, and <br />residuals are identified and discussed in the Remedial Action Work Plan <br />or Report of Waste Discharge. <br />b. Full-scale applications: <br />i. When it has been demonstrated in a pilot study, or full-scale application <br />at this site or a similar site, that the desired results can be achieved and <br />side reactions, breakdown products, and residuals do not result in long- <br />term adverse water quality effects. <br />4. Coverage under this Order applies to the following groups of amendments, except as <br />specifically excluded in A5 below, provided the conditions in Al, A2, and A3 are <br />satisfied: <br />a. Amendments that create reducing conditions (i.e., amendments that provide <br />carbon, energy, electrons and/or macronutrients). Examples include: <br />Zero valent metals such as iron or zinc <br />Easily degradable carbon sources such as glucose, acetate, citric acid, <br />acetic acid, ethanol, methanol and others <br />Slowly degradable carbon sources such as edible oils, poly-lactate, and <br />other hydrogen release compounds <br />Polysulfides <br />Macro nutrients such as nitrate, phosphate, and potassium <br />Microorganisms cultured on site materials. <br />b. Amendments that create oxidizing conditions (i.e., amendments that provide <br />oxygen or otherwise gain electrons). Examples include: <br />Air <br />Oxygen <br />Ozone <br />Potassium or sodium permanganate <br />Oxygen release compounds <br />Hydrogen peroxide