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I <br /> WASTE DISCHARGE REQUIREMENTS GENERAL ORDER NO. R5-2008-0149 9 <br /> IN-SITU GROUNDWATER REMEDIATION AT SITES IMPACTED BY VOLATILE ORGANIC <br /> COMPOUNDS, NITROGEN COMPOUNDS, PERCHLORATE, PESTICIDES, <br /> SEMI-VOLATILE COMPOUNDS, HEXAVALENT CHROMIUM AND/OR PETROLEUM HYDROCARBONS <br /> vi . 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 /> i . Air <br /> ii. Oxygen <br /> iii. Ozone <br /> iv. Potassium or sodium permanganate <br /> v. Oxygen release compounds <br /> A. Hydrogen peroxide <br /> c. Multiple amendments (includes application of reducing agents or oxidizing <br /> agents or both applied concurrently or over time as proposed in an approved <br /> Work Plan and the Notice of Intent) . Examples include: <br /> i . Establishing a reducing zone immediately downgradient of an oxidizing <br /> zone to reduce hexavalent chromium that may be produced under <br /> oxidizing conditions <br /> ii. Providing a slowly degradable carbon source along with polysulfides to <br /> precipitate sulfates as metal sulfides . <br /> d. Tracer compounds as discussed in Attachment A (Notice of Intent/Report of <br /> Waste Discharge) . <br /> e. Biofouling control agents such as chlorine dioxide, chlorine and bleach . <br /> 5. Amendments specifically excluded from coverage under this Order: <br /> a . Amendments that may cause violent exothermic reactions. <br /> B . NOTIFICATION OF COVERAGE <br /> Project coverage under this Order shall not take effect until the Executive Officer notifies <br /> the Discharger in writing, by issuance of a Notice of Applicability which shall be a part of <br /> this Order, that coverage has been issued . The Executive Officer will not issue notification <br /> of project coverage under this Order prior to providing notice and a 30-day public comment <br /> period on the proposed issuance of coverage. Notification of project coverage under this <br /> Order shall not be issued if the Executive Officer finds that there may be significant effects <br /> on water quality, or finds that significant public controversy has arisen or will likely arise <br /> from the issuance of project coverage by this Order and that individual Waste Discharge <br /> Requirements should be considered at a regularly scheduled Regional Water Board <br /> meeting . <br /> C. DISCHARGE PROHIBITIONS <br />